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         for (i = 0; i != priv->rxqs_n; ++i) {
 106                 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_rxq_get(dev, i);
 107                 struct rte_mempool *mp;
 108
 109                 if (!rxq_ctrl)
 110                         continue;
 111                 /* Pre-register Rx mempool. */
 112                 mp = rxq_ctrl->rxq.mp;
 113                 DRV_LOG(DEBUG,
 114                         "port %u Rx queue %u registering"
 115                         " mp %s having %u chunks",
 116                         dev->data->port_id, rxq_ctrl->idx,
 117                         mp->name, mp->nb_mem_chunks);
 118                 mlx5_mr_update_mp(dev, &rxq_ctrl->rxq.mr_ctrl, mp);
 119                 ret = rxq_alloc_elts(rxq_ctrl);
 120                 if (ret)
 121                         goto error;
 122                 rxq_ctrl->ibv = mlx5_rxq_ibv_new(dev, i);
 123                 if (!rxq_ctrl->ibv)
 124                         goto error;
 125         }
 126         return 0;
 127 error:
 128         ret = rte_errno; /* Save rte_errno before cleanup. */
 129         mlx5_rxq_stop(dev);
 130         rte_errno = ret; /* Restore rte_errno. */
 131         return -rte_errno;
 132 }
 133
 134 /**
 135  * DPDK callback to start the device.
 136  *
 137  * Simulate device start by attaching all configured flows.
 138  *
 139  * @param dev
 140  *   Pointer to Ethernet device structure.
 141  *
 142  * @return
 143  *   0 on success, a negative errno value otherwise and rte_errno is set.
 144  */
 145 int
 146 mlx5_dev_start(struct rte_eth_dev *dev)
 147 {
 148         struct priv *priv = dev->data->dev_private;
 149         int ret;
 150
 151         dev->data->dev_started = 1;
 152         DRV_LOG(DEBUG, "port %u allocating and configuring hash Rx queues",
 153                 dev->data->port_id);
 154         ret = mlx5_txq_start(dev);
 155         if (ret) {
 156                 DRV_LOG(ERR, "port %u Tx queue allocation failed: %s",
 157                         dev->data->port_id, strerror(rte_errno));
 158                 goto error;
 159         }
 160         ret = mlx5_rxq_start(dev);
 161         if (ret) {
 162                 DRV_LOG(ERR, "port %u Rx queue allocation failed: %s",
 163                         dev->data->port_id, strerror(rte_errno));
 164                 goto error;
 165         }
 166         if (rte_log_get_level(mlx5_logtype) == RTE_LOG_DEBUG)
 167                 mlx5_mr_dump_dev(dev);
 168         ret = mlx5_rx_intr_vec_enable(dev);
 169         if (ret) {
 170                 DRV_LOG(ERR, "port %u Rx interrupt vector creation failed",
 171                         dev->data->port_id);
 172                 goto error;
 173         }
 174         mlx5_xstats_init(dev);
 175         ret = mlx5_traffic_enable(dev);
 176         if (ret) {
 177                 DRV_LOG(DEBUG, "port %u failed to set defaults flows",
 178                         dev->data->port_id);
 179                 goto error;
 180         }
 181         ret = mlx5_flow_start(dev, &priv->flows);
 182         if (ret) {
 183                 DRV_LOG(DEBUG, "port %u failed to set flows",
 184                         dev->data->port_id);
 185                 goto error;
 186         }
 187         dev->tx_pkt_burst = mlx5_select_tx_function(dev);
 188         dev->rx_pkt_burst = mlx5_select_rx_function(dev);
 189         mlx5_dev_interrupt_handler_install(dev);
 190         return 0;
 191 error:
 192         ret = rte_errno; /* Save rte_errno before cleanup. */
 193         /* Rollback. */
 194         dev->data->dev_started = 0;
 195         mlx5_flow_stop(dev, &priv->flows);
 196         mlx5_traffic_disable(dev);
 197         mlx5_txq_stop(dev);
 198         mlx5_rxq_stop(dev);
 199         rte_errno = ret; /* Restore rte_errno. */
 200         return -rte_errno;
 201 }
 202
 203 /**
 204  * DPDK callback to stop the device.
 205  *
 206  * Simulate device stop by detaching all configured flows.
 207  *
 208  * @param dev
 209  *   Pointer to Ethernet device structure.
 210  */
 211 void
 212 mlx5_dev_stop(struct rte_eth_dev *dev)
 213 {
 214         struct priv *priv = dev->data->dev_private;
 215
 216         dev->data->dev_started = 0;
 217         /* Prevent crashes when queues are still in use. */
 218         dev->rx_pkt_burst = removed_rx_burst;
 219         dev->tx_pkt_burst = removed_tx_burst;
 220         rte_wmb();
 221         usleep(1000 * priv->rxqs_n);
 222         DRV_LOG(DEBUG, "port %u cleaning up and destroying hash Rx queues",
 223                 dev->data->port_id);
 224         mlx5_flow_stop(dev, &priv->flows);
 225         mlx5_traffic_disable(dev);
 226         mlx5_rx_intr_vec_disable(dev);
 227         mlx5_dev_interrupt_handler_uninstall(dev);
 228         mlx5_txq_stop(dev);
 229         mlx5_rxq_stop(dev);
 230 }
 231
 232 /**
 233  * Enable traffic flows configured by control plane
 234  *
 235  * @param dev
 236  *   Pointer to Ethernet device private data.
 237  * @param dev
 238  *   Pointer to Ethernet device structure.
 239  *
 240  * @return
 241  *   0 on success, a negative errno value otherwise and rte_errno is set.
 242  */
 243 int
 244 mlx5_traffic_enable(struct rte_eth_dev *dev)
 245 {
 246         struct priv *priv = dev->data->dev_private;
 247         struct rte_flow_item_eth bcast = {
 248                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 249         };
 250         struct rte_flow_item_eth ipv6_multi_spec = {
 251                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 252         };
 253         struct rte_flow_item_eth ipv6_multi_mask = {
 254                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 255         };
 256         struct rte_flow_item_eth unicast = {
 257                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 258         };
 259         struct rte_flow_item_eth unicast_mask = {
 260                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 261         };
 262         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 263         const struct ether_addr cmp = {
 264                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 265         };
 266         unsigned int i;
 267         unsigned int j;
 268         int ret;
 269
 270         if (priv->isolated)
 271                 return 0;
 272         if (dev->data->promiscuous) {
 273                 struct rte_flow_item_eth promisc = {
 274                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 275                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 276                         .type = 0,
 277                 };
 278
 279                 ret = mlx5_ctrl_flow(dev, &promisc, &promisc);
 280                 if (ret)
 281                         goto error;
 282         }
 283         if (dev->data->all_multicast) {
 284                 struct rte_flow_item_eth multicast = {
 285                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 286                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 287                         .type = 0,
 288                 };
 289
 290                 ret = mlx5_ctrl_flow(dev, &multicast, &multicast);
 291                 if (ret)
 292                         goto error;
 293         } else {
 294                 /* Add broadcast/multicast flows. */
 295                 for (i = 0; i != vlan_filter_n; ++i) {
 296                         uint16_t vlan = priv->vlan_filter[i];
 297
 298                         struct rte_flow_item_vlan vlan_spec = {
 299                                 .tci = rte_cpu_to_be_16(vlan),
 300                         };
 301                         struct rte_flow_item_vlan vlan_mask = {
 302                                 .tci = 0xffff,
 303                         };
 304
 305                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 306                                                   &vlan_spec, &vlan_mask);
 307                         if (ret)
 308                                 goto error;
 309                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 310                                                   &ipv6_multi_mask,
 311                                                   &vlan_spec, &vlan_mask);
 312                         if (ret)
 313                                 goto error;
 314                 }
 315                 if (!vlan_filter_n) {
 316                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 317                         if (ret)
 318                                 goto error;
 319                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 320                                              &ipv6_multi_mask);
 321                         if (ret)
 322                                 goto error;
 323                 }
 324         }
 325         /* Add MAC address flows. */
 326         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 327                 struct ether_addr *mac = &dev->data->mac_addrs[i];
 328
 329                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 330                         continue;
 331                 memcpy(&unicast.dst.addr_bytes,
 332                        mac->addr_bytes,
 333                        ETHER_ADDR_LEN);
 334                 for (j = 0; j != vlan_filter_n; ++j) {
 335                         uint16_t vlan = priv->vlan_filter[j];
 336
 337                         struct rte_flow_item_vlan vlan_spec = {
 338                                 .tci = rte_cpu_to_be_16(vlan),
 339                         };
 340                         struct rte_flow_item_vlan vlan_mask = {
 341                                 .tci = 0xffff,
 342                         };
 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 }