drivers/net/mlx5/mlx5_trigger.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright 2015 6WIND S.A.
   5  *   Copyright 2015 Mellanox.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of 6WIND S.A. nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33 #include <unistd.h>
  34
  35 #include <rte_ether.h>
  36 #include <rte_ethdev.h>
  37 #include <rte_interrupts.h>
  38 #include <rte_alarm.h>
  39
  40 #include "mlx5.h"
  41 #include "mlx5_rxtx.h"
  42 #include "mlx5_utils.h"
  43
  44 static void
  45 priv_txq_stop(struct priv *priv)
  46 {
  47         unsigned int i;
  48
  49         for (i = 0; i != priv->txqs_n; ++i)
  50                 mlx5_priv_txq_release(priv, i);
  51 }
  52
  53 static int
  54 priv_txq_start(struct priv *priv)
  55 {
  56         unsigned int i;
  57         int ret = 0;
  58
  59         /* Add memory regions to Tx queues. */
  60         for (i = 0; i != priv->txqs_n; ++i) {
  61                 unsigned int idx = 0;
  62                 struct mlx5_mr *mr;
  63                 struct mlx5_txq_ctrl *txq_ctrl = mlx5_priv_txq_get(priv, i);
  64
  65                 if (!txq_ctrl)
  66                         continue;
  67                 LIST_FOREACH(mr, &priv->mr, next)
  68                         priv_txq_mp2mr_reg(priv, &txq_ctrl->txq, mr->mp, idx++);
  69                 txq_alloc_elts(txq_ctrl);
  70                 txq_ctrl->ibv = mlx5_priv_txq_ibv_new(priv, i);
  71                 if (!txq_ctrl->ibv) {
  72                         ret = ENOMEM;
  73                         goto error;
  74                 }
  75         }
  76         return -ret;
  77 error:
  78         priv_txq_stop(priv);
  79         return -ret;
  80 }
  81
  82 static void
  83 priv_rxq_stop(struct priv *priv)
  84 {
  85         unsigned int i;
  86
  87         for (i = 0; i != priv->rxqs_n; ++i)
  88                 mlx5_priv_rxq_release(priv, i);
  89 }
  90
  91 static int
  92 priv_rxq_start(struct priv *priv)
  93 {
  94         unsigned int i;
  95         int ret = 0;
  96
  97         for (i = 0; i != priv->rxqs_n; ++i) {
  98                 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_priv_rxq_get(priv, i);
  99
 100                 if (!rxq_ctrl)
 101                         continue;
 102                 ret = rxq_alloc_elts(rxq_ctrl);
 103                 if (ret)
 104                         goto error;
 105                 rxq_ctrl->ibv = mlx5_priv_rxq_ibv_new(priv, i);
 106                 if (!rxq_ctrl->ibv) {
 107                         ret = ENOMEM;
 108                         goto error;
 109                 }
 110         }
 111         return -ret;
 112 error:
 113         priv_rxq_stop(priv);
 114         return -ret;
 115 }
 116
 117 /**
 118  * DPDK callback to start the device.
 119  *
 120  * Simulate device start by attaching all configured flows.
 121  *
 122  * @param dev
 123  *   Pointer to Ethernet device structure.
 124  *
 125  * @return
 126  *   0 on success, negative errno value on failure.
 127  */
 128 int
 129 mlx5_dev_start(struct rte_eth_dev *dev)
 130 {
 131         struct priv *priv = dev->data->dev_private;
 132         struct mlx5_mr *mr = NULL;
 133         int err;
 134
 135         if (mlx5_is_secondary())
 136                 return -E_RTE_SECONDARY;
 137
 138         dev->data->dev_started = 1;
 139         priv_lock(priv);
 140         err = priv_flow_create_drop_queue(priv);
 141         if (err) {
 142                 ERROR("%p: Drop queue allocation failed: %s",
 143                       (void *)dev, strerror(err));
 144                 goto error;
 145         }
 146         DEBUG("%p: allocating and configuring hash RX queues", (void *)dev);
 147         rte_mempool_walk(mlx5_mp2mr_iter, priv);
 148         err = priv_txq_start(priv);
 149         if (err) {
 150                 ERROR("%p: TXQ allocation failed: %s",
 151                       (void *)dev, strerror(err));
 152                 goto error;
 153         }
 154         /* Update send callback. */
 155         priv_dev_select_tx_function(priv, dev);
 156         err = priv_rxq_start(priv);
 157         if (err) {
 158                 ERROR("%p: RXQ allocation failed: %s",
 159                       (void *)dev, strerror(err));
 160                 goto error;
 161         }
 162         /* Update receive callback. */
 163         priv_dev_select_rx_function(priv, dev);
 164         err = priv_dev_traffic_enable(priv, dev);
 165         if (err) {
 166                 ERROR("%p: an error occurred while configuring control flows:"
 167                       " %s",
 168                       (void *)priv, strerror(err));
 169                 goto error;
 170         }
 171         err = priv_flow_start(priv, &priv->flows);
 172         if (err) {
 173                 ERROR("%p: an error occurred while configuring flows:"
 174                       " %s",
 175                       (void *)priv, strerror(err));
 176                 goto error;
 177         }
 178         err = priv_rx_intr_vec_enable(priv);
 179         if (err) {
 180                 ERROR("%p: RX interrupt vector creation failed",
 181                       (void *)priv);
 182                 goto error;
 183         }
 184         priv_dev_interrupt_handler_install(priv, dev);
 185         priv_xstats_init(priv);
 186         priv_unlock(priv);
 187         return 0;
 188 error:
 189         /* Rollback. */
 190         dev->data->dev_started = 0;
 191         for (mr = LIST_FIRST(&priv->mr); mr; mr = LIST_FIRST(&priv->mr))
 192                 priv_mr_release(priv, mr);
 193         priv_flow_stop(priv, &priv->flows);
 194         priv_dev_traffic_disable(priv, dev);
 195         priv_txq_stop(priv);
 196         priv_rxq_stop(priv);
 197         priv_flow_delete_drop_queue(priv);
 198         priv_unlock(priv);
 199         return -err;
 200 }
 201
 202 /**
 203  * DPDK callback to stop the device.
 204  *
 205  * Simulate device stop by detaching all configured flows.
 206  *
 207  * @param dev
 208  *   Pointer to Ethernet device structure.
 209  */
 210 void
 211 mlx5_dev_stop(struct rte_eth_dev *dev)
 212 {
 213         struct priv *priv = dev->data->dev_private;
 214         struct mlx5_mr *mr;
 215
 216         if (mlx5_is_secondary())
 217                 return;
 218
 219         priv_lock(priv);
 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         DEBUG("%p: cleaning up and destroying hash RX queues", (void *)dev);
 227         priv_flow_stop(priv, &priv->flows);
 228         priv_dev_traffic_disable(priv, dev);
 229         priv_rx_intr_vec_disable(priv);
 230         priv_dev_interrupt_handler_uninstall(priv, dev);
 231         priv_txq_stop(priv);
 232         priv_rxq_stop(priv);
 233         for (mr = LIST_FIRST(&priv->mr); mr; mr = LIST_FIRST(&priv->mr))
 234                 priv_mr_release(priv, mr);
 235         priv_flow_delete_drop_queue(priv);
 236         priv_unlock(priv);
 237 }
 238
 239 /**
 240  * Enable traffic flows configured by control plane
 241  *
 242  * @param priv
 243  *   Pointer to Ethernet device private data.
 244  * @param dev
 245  *   Pointer to Ethernet device structure.
 246  *
 247  * @return
 248  *   0 on success.
 249  */
 250 int
 251 priv_dev_traffic_enable(struct priv *priv, struct rte_eth_dev *dev)
 252 {
 253         struct rte_flow_item_eth bcast = {
 254                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 255         };
 256         struct rte_flow_item_eth ipv6_multi_spec = {
 257                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 258         };
 259         struct rte_flow_item_eth ipv6_multi_mask = {
 260                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 261         };
 262         struct rte_flow_item_eth unicast = {
 263                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 264         };
 265         struct rte_flow_item_eth unicast_mask = {
 266                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 267         };
 268         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 269         const struct ether_addr cmp = {
 270                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 271         };
 272         unsigned int i;
 273         unsigned int j;
 274         int ret;
 275
 276         if (priv->isolated)
 277                 return 0;
 278         if (dev->data->promiscuous) {
 279                 struct rte_flow_item_eth promisc = {
 280                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 281                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 282                         .type = 0,
 283                 };
 284
 285                 claim_zero(mlx5_ctrl_flow(dev, &promisc, &promisc));
 286                 return 0;
 287         }
 288         if (dev->data->all_multicast) {
 289                 struct rte_flow_item_eth multicast = {
 290                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 291                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 292                         .type = 0,
 293                 };
 294
 295                 claim_zero(mlx5_ctrl_flow(dev, &multicast, &multicast));
 296         } else {
 297                 /* Add broadcast/multicast flows. */
 298                 for (i = 0; i != vlan_filter_n; ++i) {
 299                         uint16_t vlan = priv->vlan_filter[i];
 300
 301                         struct rte_flow_item_vlan vlan_spec = {
 302                                 .tci = rte_cpu_to_be_16(vlan),
 303                         };
 304                         struct rte_flow_item_vlan vlan_mask = {
 305                                 .tci = 0xffff,
 306                         };
 307
 308                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 309                                                   &vlan_spec, &vlan_mask);
 310                         if (ret)
 311                                 goto error;
 312                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 313                                                   &ipv6_multi_mask,
 314                                                   &vlan_spec, &vlan_mask);
 315                         if (ret)
 316                                 goto error;
 317                 }
 318                 if (!vlan_filter_n) {
 319                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 320                         if (ret)
 321                                 goto error;
 322                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 323                                              &ipv6_multi_mask);
 324                         if (ret)
 325                                 goto error;
 326                 }
 327         }
 328         /* Add MAC address flows. */
 329         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 330                 struct ether_addr *mac = &dev->data->mac_addrs[i];
 331
 332                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 333                         continue;
 334                 memcpy(&unicast.dst.addr_bytes,
 335                        mac->addr_bytes,
 336                        ETHER_ADDR_LEN);
 337                 for (j = 0; j != vlan_filter_n; ++j) {
 338                         uint16_t vlan = priv->vlan_filter[j];
 339
 340                         struct rte_flow_item_vlan vlan_spec = {
 341                                 .tci = rte_cpu_to_be_16(vlan),
 342                         };
 343                         struct rte_flow_item_vlan vlan_mask = {
 344                                 .tci = 0xffff,
 345                         };
 346
 347                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 348                                                   &unicast_mask,
 349                                                   &vlan_spec,
 350                                                   &vlan_mask);
 351                         if (ret)
 352                                 goto error;
 353                 }
 354                 if (!vlan_filter_n) {
 355                         ret = mlx5_ctrl_flow(dev, &unicast,
 356                                              &unicast_mask);
 357                         if (ret)
 358                                 goto error;
 359                 }
 360         }
 361         return 0;
 362 error:
 363         return rte_errno;
 364 }
 365
 366
 367 /**
 368  * Disable traffic flows configured by control plane
 369  *
 370  * @param priv
 371  *   Pointer to Ethernet device private data.
 372  * @param dev
 373  *   Pointer to Ethernet device structure.
 374  *
 375  * @return
 376  *   0 on success.
 377  */
 378 int
 379 priv_dev_traffic_disable(struct priv *priv, struct rte_eth_dev *dev)
 380 {
 381         (void)dev;
 382         priv_flow_flush(priv, &priv->ctrl_flows);
 383         return 0;
 384 }
 385
 386 /**
 387  * Restart traffic flows configured by control plane
 388  *
 389  * @param priv
 390  *   Pointer to Ethernet device private data.
 391  * @param dev
 392  *   Pointer to Ethernet device structure.
 393  *
 394  * @return
 395  *   0 on success.
 396  */
 397 int
 398 priv_dev_traffic_restart(struct priv *priv, struct rte_eth_dev *dev)
 399 {
 400         if (dev->data->dev_started) {
 401                 priv_dev_traffic_disable(priv, dev);
 402                 priv_dev_traffic_enable(priv, dev);
 403         }
 404         return 0;
 405 }
 406
 407 /**
 408  * Restart traffic flows configured by control plane
 409  *
 410  * @param dev
 411  *   Pointer to Ethernet device structure.
 412  *
 413  * @return
 414  *   0 on success.
 415  */
 416 int
 417 mlx5_traffic_restart(struct rte_eth_dev *dev)
 418 {
 419         struct priv *priv = dev->data->dev_private;
 420
 421         priv_lock(priv);
 422         priv_dev_traffic_restart(priv, dev);
 423         priv_unlock(priv);
 424         return 0;
 425 }