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         if (rte_log_get_level(mlx5_logtype) == RTE_LOG_DEBUG)
 171                 mlx5_mr_dump_dev(dev);
 172         ret = mlx5_rx_intr_vec_enable(dev);
 173         if (ret) {
 174                 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed",
 175                         dev->data->port_id);
 176                 goto error;
 177         }
 178         mlx5_xstats_init(dev);
 179         ret = mlx5_traffic_enable(dev);
 180         if (ret) {
 181                 DRV_LOG(DEBUG, "port %u failed to set defaults flows",
 182                         dev->data->port_id);
 183                 goto error;
 184         }
 185         ret = mlx5_flow_start(dev, &priv->flows);
 186         if (ret) {
 187                 DRV_LOG(DEBUG, "port %u failed to set flows",
 188                         dev->data->port_id);
 189                 goto error;
 190         }
 191         dev->tx_pkt_burst = mlx5_select_tx_function(dev);
 192         dev->rx_pkt_burst = mlx5_select_rx_function(dev);
 193         mlx5_dev_interrupt_handler_install(dev);
 194         return 0;
 195 error:
 196         ret = rte_errno; /* Save rte_errno before cleanup. */
 197         /* Rollback. */
 198         dev->data->dev_started = 0;
 199         mlx5_flow_stop(dev, &priv->flows);
 200         mlx5_traffic_disable(dev);
 201         mlx5_txq_stop(dev);
 202         mlx5_rxq_stop(dev);
 203         rte_errno = ret; /* Restore rte_errno. */
 204         return -rte_errno;
 205 }
 206
 207 /**
 208  * DPDK callback to stop the device.
 209  *
 210  * Simulate device stop by detaching all configured flows.
 211  *
 212  * @param dev
 213  *   Pointer to Ethernet device structure.
 214  */
 215 void
 216 mlx5_dev_stop(struct rte_eth_dev *dev)
 217 {
 218         struct priv *priv = dev->data->dev_private;
 219
 220         dev->data->dev_started = 0;
 221         /* Prevent crashes when queues are still in use. */
 222         dev->rx_pkt_burst = removed_rx_burst;
 223         dev->tx_pkt_burst = removed_tx_burst;
 224         rte_wmb();
 225         usleep(1000 * priv->rxqs_n);
 226         DRV_LOG(DEBUG, "port %u cleaning up and destroying hash Rx queues",
 227                 dev->data->port_id);
 228         mlx5_flow_stop(dev, &priv->flows);
 229         mlx5_traffic_disable(dev);
 230         mlx5_rx_intr_vec_disable(dev);
 231         mlx5_dev_interrupt_handler_uninstall(dev);
 232         mlx5_txq_stop(dev);
 233         mlx5_rxq_stop(dev);
 234 }
 235
 236 /**
 237  * Enable traffic flows configured by control plane
 238  *
 239  * @param dev
 240  *   Pointer to Ethernet device private data.
 241  * @param dev
 242  *   Pointer to Ethernet device structure.
 243  *
 244  * @return
 245  *   0 on success, a negative errno value otherwise and rte_errno is set.
 246  */
 247 int
 248 mlx5_traffic_enable(struct rte_eth_dev *dev)
 249 {
 250         struct priv *priv = dev->data->dev_private;
 251         struct rte_flow_item_eth bcast = {
 252                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 253         };
 254         struct rte_flow_item_eth ipv6_multi_spec = {
 255                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 256         };
 257         struct rte_flow_item_eth ipv6_multi_mask = {
 258                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 259         };
 260         struct rte_flow_item_eth unicast = {
 261                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 262         };
 263         struct rte_flow_item_eth unicast_mask = {
 264                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 265         };
 266         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 267         const struct ether_addr cmp = {
 268                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 269         };
 270         unsigned int i;
 271         unsigned int j;
 272         int ret;
 273
 274         if (priv->isolated)
 275                 return 0;
 276         if (dev->data->promiscuous) {
 277                 struct rte_flow_item_eth promisc = {
 278                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 279                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 280                         .type = 0,
 281                 };
 282
 283                 ret = mlx5_ctrl_flow(dev, &promisc, &promisc);
 284                 if (ret)
 285                         goto error;
 286         }
 287         if (dev->data->all_multicast) {
 288                 struct rte_flow_item_eth multicast = {
 289                         .dst.addr_bytes = "\x01\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, &multicast, &multicast);
 295                 if (ret)
 296                         goto error;
 297         } else {
 298                 /* Add broadcast/multicast flows. */
 299                 for (i = 0; i != vlan_filter_n; ++i) {
 300                         uint16_t vlan = priv->vlan_filter[i];
 301
 302                         struct rte_flow_item_vlan vlan_spec = {
 303                                 .tci = rte_cpu_to_be_16(vlan),
 304                         };
 305                         struct rte_flow_item_vlan vlan_mask = {
 306                                 .tci = 0xffff,
 307                         };
 308
 309                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 310                                                   &vlan_spec, &vlan_mask);
 311                         if (ret)
 312                                 goto error;
 313                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 314                                                   &ipv6_multi_mask,
 315                                                   &vlan_spec, &vlan_mask);
 316                         if (ret)
 317                                 goto error;
 318                 }
 319                 if (!vlan_filter_n) {
 320                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 321                         if (ret)
 322                                 goto error;
 323                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 324                                              &ipv6_multi_mask);
 325                         if (ret)
 326                                 goto error;
 327                 }
 328         }
 329         /* Add MAC address flows. */
 330         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 331                 struct ether_addr *mac = &dev->data->mac_addrs[i];
 332
 333                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 334                         continue;
 335                 memcpy(&unicast.dst.addr_bytes,
 336                        mac->addr_bytes,
 337                        ETHER_ADDR_LEN);
 338                 for (j = 0; j != vlan_filter_n; ++j) {
 339                         uint16_t vlan = priv->vlan_filter[j];
 340
 341                         struct rte_flow_item_vlan vlan_spec = {
 342                                 .tci = rte_cpu_to_be_16(vlan),
 343                         };
 344                         struct rte_flow_item_vlan vlan_mask = {
 345                                 .tci = 0xffff,
 346                         };
 347
 348                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 349                                                   &unicast_mask,
 350                                                   &vlan_spec,
 351                                                   &vlan_mask);
 352                         if (ret)
 353                                 goto error;
 354                 }
 355                 if (!vlan_filter_n) {
 356                         ret = mlx5_ctrl_flow(dev, &unicast, &unicast_mask);
 357                         if (ret)
 358                                 goto error;
 359                 }
 360         }
 361         return 0;
 362 error:
 363         ret = rte_errno; /* Save rte_errno before cleanup. */
 364         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 365         rte_errno = ret; /* Restore rte_errno. */
 366         return -rte_errno;
 367 }
 368
 369
 370 /**
 371  * Disable traffic flows configured by control plane
 372  *
 373  * @param dev
 374  *   Pointer to Ethernet device private data.
 375  */
 376 void
 377 mlx5_traffic_disable(struct rte_eth_dev *dev)
 378 {
 379         struct priv *priv = dev->data->dev_private;
 380
 381         mlx5_flow_list_flush(dev, &priv->ctrl_flows);
 382 }
 383
 384 /**
 385  * Restart traffic flows configured by control plane
 386  *
 387  * @param dev
 388  *   Pointer to Ethernet device private data.
 389  *
 390  * @return
 391  *   0 on success, a negative errno value otherwise and rte_errno is set.
 392  */
 393 int
 394 mlx5_traffic_restart(struct rte_eth_dev *dev)
 395 {
 396         if (dev->data->dev_started) {
 397                 mlx5_traffic_disable(dev);
 398                 return mlx5_traffic_enable(dev);
 399         }
 400         return 0;
 401 }