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_driver.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                         if (idx == MLX5_PMD_TX_MP_CACHE)
  70                                 break;
  71                 }
  72                 txq_alloc_elts(txq_ctrl);
  73                 txq_ctrl->ibv = mlx5_priv_txq_ibv_new(priv, i);
  74                 if (!txq_ctrl->ibv) {
  75                         ret = ENOMEM;
  76                         goto error;
  77                 }
  78         }
  79         return -ret;
  80 error:
  81         priv_txq_stop(priv);
  82         return -ret;
  83 }
  84
  85 static void
  86 priv_rxq_stop(struct priv *priv)
  87 {
  88         unsigned int i;
  89
  90         for (i = 0; i != priv->rxqs_n; ++i)
  91                 mlx5_priv_rxq_release(priv, i);
  92 }
  93
  94 static int
  95 priv_rxq_start(struct priv *priv)
  96 {
  97         unsigned int i;
  98         int ret = 0;
  99
 100         for (i = 0; i != priv->rxqs_n; ++i) {
 101                 struct mlx5_rxq_ctrl *rxq_ctrl = mlx5_priv_rxq_get(priv, i);
 102
 103                 if (!rxq_ctrl)
 104                         continue;
 105                 ret = rxq_alloc_elts(rxq_ctrl);
 106                 if (ret)
 107                         goto error;
 108                 rxq_ctrl->ibv = mlx5_priv_rxq_ibv_new(priv, i);
 109                 if (!rxq_ctrl->ibv) {
 110                         ret = ENOMEM;
 111                         goto error;
 112                 }
 113         }
 114         return -ret;
 115 error:
 116         priv_rxq_stop(priv);
 117         return -ret;
 118 }
 119
 120 /**
 121  * DPDK callback to start the device.
 122  *
 123  * Simulate device start by attaching all configured flows.
 124  *
 125  * @param dev
 126  *   Pointer to Ethernet device structure.
 127  *
 128  * @return
 129  *   0 on success, negative errno value on failure.
 130  */
 131 int
 132 mlx5_dev_start(struct rte_eth_dev *dev)
 133 {
 134         struct priv *priv = dev->data->dev_private;
 135         struct mlx5_mr *mr = NULL;
 136         int err;
 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         err = priv_rxq_start(priv);
 155         if (err) {
 156                 ERROR("%p: RXQ allocation failed: %s",
 157                       (void *)dev, strerror(err));
 158                 goto error;
 159         }
 160         err = priv_rx_intr_vec_enable(priv);
 161         if (err) {
 162                 ERROR("%p: RX interrupt vector creation failed",
 163                       (void *)priv);
 164                 goto error;
 165         }
 166         priv_xstats_init(priv);
 167         /* Update link status and Tx/Rx callbacks for the first time. */
 168         memset(&dev->data->dev_link, 0, sizeof(struct rte_eth_link));
 169         priv_link_update(priv, 1);
 170         priv_dev_interrupt_handler_install(priv, dev);
 171         priv_unlock(priv);
 172         return 0;
 173 error:
 174         /* Rollback. */
 175         dev->data->dev_started = 0;
 176         for (mr = LIST_FIRST(&priv->mr); mr; mr = LIST_FIRST(&priv->mr))
 177                 priv_mr_release(priv, mr);
 178         priv_flow_stop(priv, &priv->flows);
 179         priv_dev_traffic_disable(priv, dev);
 180         priv_txq_stop(priv);
 181         priv_rxq_stop(priv);
 182         priv_flow_delete_drop_queue(priv);
 183         priv_unlock(priv);
 184         return -err;
 185 }
 186
 187 /**
 188  * DPDK callback to stop the device.
 189  *
 190  * Simulate device stop by detaching all configured flows.
 191  *
 192  * @param dev
 193  *   Pointer to Ethernet device structure.
 194  */
 195 void
 196 mlx5_dev_stop(struct rte_eth_dev *dev)
 197 {
 198         struct priv *priv = dev->data->dev_private;
 199         struct mlx5_mr *mr;
 200
 201         priv_lock(priv);
 202         dev->data->dev_started = 0;
 203         /* Prevent crashes when queues are still in use. */
 204         dev->rx_pkt_burst = removed_rx_burst;
 205         dev->tx_pkt_burst = removed_tx_burst;
 206         rte_wmb();
 207         usleep(1000 * priv->rxqs_n);
 208         DEBUG("%p: cleaning up and destroying hash RX queues", (void *)dev);
 209         priv_flow_stop(priv, &priv->flows);
 210         priv_dev_traffic_disable(priv, dev);
 211         priv_rx_intr_vec_disable(priv);
 212         priv_dev_interrupt_handler_uninstall(priv, dev);
 213         priv_txq_stop(priv);
 214         priv_rxq_stop(priv);
 215         for (mr = LIST_FIRST(&priv->mr); mr; mr = LIST_FIRST(&priv->mr))
 216                 priv_mr_release(priv, mr);
 217         priv_flow_delete_drop_queue(priv);
 218         priv_unlock(priv);
 219 }
 220
 221 /**
 222  * Enable traffic flows configured by control plane
 223  *
 224  * @param priv
 225  *   Pointer to Ethernet device private data.
 226  * @param dev
 227  *   Pointer to Ethernet device structure.
 228  *
 229  * @return
 230  *   0 on success.
 231  */
 232 int
 233 priv_dev_traffic_enable(struct priv *priv, struct rte_eth_dev *dev)
 234 {
 235         struct rte_flow_item_eth bcast = {
 236                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 237         };
 238         struct rte_flow_item_eth ipv6_multi_spec = {
 239                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 240         };
 241         struct rte_flow_item_eth ipv6_multi_mask = {
 242                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 243         };
 244         struct rte_flow_item_eth unicast = {
 245                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 246         };
 247         struct rte_flow_item_eth unicast_mask = {
 248                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 249         };
 250         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 251         const struct ether_addr cmp = {
 252                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 253         };
 254         unsigned int i;
 255         unsigned int j;
 256         int ret;
 257
 258         if (priv->isolated)
 259                 return 0;
 260         if (dev->data->promiscuous) {
 261                 struct rte_flow_item_eth promisc = {
 262                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 263                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 264                         .type = 0,
 265                 };
 266
 267                 claim_zero(mlx5_ctrl_flow(dev, &promisc, &promisc));
 268                 return 0;
 269         }
 270         if (dev->data->all_multicast) {
 271                 struct rte_flow_item_eth multicast = {
 272                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 273                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 274                         .type = 0,
 275                 };
 276
 277                 claim_zero(mlx5_ctrl_flow(dev, &multicast, &multicast));
 278         } else {
 279                 /* Add broadcast/multicast flows. */
 280                 for (i = 0; i != vlan_filter_n; ++i) {
 281                         uint16_t vlan = priv->vlan_filter[i];
 282
 283                         struct rte_flow_item_vlan vlan_spec = {
 284                                 .tci = rte_cpu_to_be_16(vlan),
 285                         };
 286                         struct rte_flow_item_vlan vlan_mask = {
 287                                 .tci = 0xffff,
 288                         };
 289
 290                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 291                                                   &vlan_spec, &vlan_mask);
 292                         if (ret)
 293                                 goto error;
 294                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 295                                                   &ipv6_multi_mask,
 296                                                   &vlan_spec, &vlan_mask);
 297                         if (ret)
 298                                 goto error;
 299                 }
 300                 if (!vlan_filter_n) {
 301                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 302                         if (ret)
 303                                 goto error;
 304                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 305                                              &ipv6_multi_mask);
 306                         if (ret)
 307                                 goto error;
 308                 }
 309         }
 310         /* Add MAC address flows. */
 311         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 312                 struct ether_addr *mac = &dev->data->mac_addrs[i];
 313
 314                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 315                         continue;
 316                 memcpy(&unicast.dst.addr_bytes,
 317                        mac->addr_bytes,
 318                        ETHER_ADDR_LEN);
 319                 for (j = 0; j != vlan_filter_n; ++j) {
 320                         uint16_t vlan = priv->vlan_filter[j];
 321
 322                         struct rte_flow_item_vlan vlan_spec = {
 323                                 .tci = rte_cpu_to_be_16(vlan),
 324                         };
 325                         struct rte_flow_item_vlan vlan_mask = {
 326                                 .tci = 0xffff,
 327                         };
 328
 329                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 330                                                   &unicast_mask,
 331                                                   &vlan_spec,
 332                                                   &vlan_mask);
 333                         if (ret)
 334                                 goto error;
 335                 }
 336                 if (!vlan_filter_n) {
 337                         ret = mlx5_ctrl_flow(dev, &unicast,
 338                                              &unicast_mask);
 339                         if (ret)
 340                                 goto error;
 341                 }
 342         }
 343         return 0;
 344 error:
 345         return rte_errno;
 346 }
 347
 348
 349 /**
 350  * Disable traffic flows configured by control plane
 351  *
 352  * @param priv
 353  *   Pointer to Ethernet device private data.
 354  * @param dev
 355  *   Pointer to Ethernet device structure.
 356  *
 357  * @return
 358  *   0 on success.
 359  */
 360 int
 361 priv_dev_traffic_disable(struct priv *priv, struct rte_eth_dev *dev)
 362 {
 363         (void)dev;
 364         priv_flow_flush(priv, &priv->ctrl_flows);
 365         return 0;
 366 }
 367
 368 /**
 369  * Restart traffic flows configured by control plane
 370  *
 371  * @param priv
 372  *   Pointer to Ethernet device private data.
 373  * @param dev
 374  *   Pointer to Ethernet device structure.
 375  *
 376  * @return
 377  *   0 on success.
 378  */
 379 int
 380 priv_dev_traffic_restart(struct priv *priv, struct rte_eth_dev *dev)
 381 {
 382         if (dev->data->dev_started) {
 383                 priv_dev_traffic_disable(priv, dev);
 384                 priv_dev_traffic_enable(priv, dev);
 385         }
 386         return 0;
 387 }
 388
 389 /**
 390  * Restart traffic flows configured by control plane
 391  *
 392  * @param dev
 393  *   Pointer to Ethernet device structure.
 394  *
 395  * @return
 396  *   0 on success.
 397  */
 398 int
 399 mlx5_traffic_restart(struct rte_eth_dev *dev)
 400 {
 401         struct priv *priv = dev->data->dev_private;
 402
 403         priv_lock(priv);
 404         priv_dev_traffic_restart(priv, dev);
 405         priv_unlock(priv);
 406         return 0;
 407 }