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                         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         /* 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         priv_lock(priv);
 217         dev->data->dev_started = 0;
 218         /* Prevent crashes when queues are still in use. */
 219         dev->rx_pkt_burst = removed_rx_burst;
 220         dev->tx_pkt_burst = removed_tx_burst;
 221         rte_wmb();
 222         usleep(1000 * priv->rxqs_n);
 223         DEBUG("%p: cleaning up and destroying hash RX queues", (void *)dev);
 224         priv_flow_stop(priv, &priv->flows);
 225         priv_dev_traffic_disable(priv, dev);
 226         priv_rx_intr_vec_disable(priv);
 227         priv_dev_interrupt_handler_uninstall(priv, dev);
 228         priv_txq_stop(priv);
 229         priv_rxq_stop(priv);
 230         for (mr = LIST_FIRST(&priv->mr); mr; mr = LIST_FIRST(&priv->mr))
 231                 priv_mr_release(priv, mr);
 232         priv_flow_delete_drop_queue(priv);
 233         priv_unlock(priv);
 234 }
 235
 236 /**
 237  * Enable traffic flows configured by control plane
 238  *
 239  * @param priv
 240  *   Pointer to Ethernet device private data.
 241  * @param dev
 242  *   Pointer to Ethernet device structure.
 243  *
 244  * @return
 245  *   0 on success.
 246  */
 247 int
 248 priv_dev_traffic_enable(struct priv *priv, struct rte_eth_dev *dev)
 249 {
 250         struct rte_flow_item_eth bcast = {
 251                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 252         };
 253         struct rte_flow_item_eth ipv6_multi_spec = {
 254                 .dst.addr_bytes = "\x33\x33\x00\x00\x00\x00",
 255         };
 256         struct rte_flow_item_eth ipv6_multi_mask = {
 257                 .dst.addr_bytes = "\xff\xff\x00\x00\x00\x00",
 258         };
 259         struct rte_flow_item_eth unicast = {
 260                 .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 261         };
 262         struct rte_flow_item_eth unicast_mask = {
 263                 .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
 264         };
 265         const unsigned int vlan_filter_n = priv->vlan_filter_n;
 266         const struct ether_addr cmp = {
 267                 .addr_bytes = "\x00\x00\x00\x00\x00\x00",
 268         };
 269         unsigned int i;
 270         unsigned int j;
 271         int ret;
 272
 273         if (priv->isolated)
 274                 return 0;
 275         if (dev->data->promiscuous) {
 276                 struct rte_flow_item_eth promisc = {
 277                         .dst.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 278                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 279                         .type = 0,
 280                 };
 281
 282                 claim_zero(mlx5_ctrl_flow(dev, &promisc, &promisc));
 283                 return 0;
 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                 claim_zero(mlx5_ctrl_flow(dev, &multicast, &multicast));
 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,
 353                                              &unicast_mask);
 354                         if (ret)
 355                                 goto error;
 356                 }
 357         }
 358         return 0;
 359 error:
 360         return rte_errno;
 361 }
 362
 363
 364 /**
 365  * Disable traffic flows configured by control plane
 366  *
 367  * @param priv
 368  *   Pointer to Ethernet device private data.
 369  * @param dev
 370  *   Pointer to Ethernet device structure.
 371  *
 372  * @return
 373  *   0 on success.
 374  */
 375 int
 376 priv_dev_traffic_disable(struct priv *priv, struct rte_eth_dev *dev)
 377 {
 378         (void)dev;
 379         priv_flow_flush(priv, &priv->ctrl_flows);
 380         return 0;
 381 }
 382
 383 /**
 384  * Restart traffic flows configured by control plane
 385  *
 386  * @param priv
 387  *   Pointer to Ethernet device private data.
 388  * @param dev
 389  *   Pointer to Ethernet device structure.
 390  *
 391  * @return
 392  *   0 on success.
 393  */
 394 int
 395 priv_dev_traffic_restart(struct priv *priv, struct rte_eth_dev *dev)
 396 {
 397         if (dev->data->dev_started) {
 398                 priv_dev_traffic_disable(priv, dev);
 399                 priv_dev_traffic_enable(priv, dev);
 400         }
 401         return 0;
 402 }
 403
 404 /**
 405  * Restart traffic flows configured by control plane
 406  *
 407  * @param dev
 408  *   Pointer to Ethernet device structure.
 409  *
 410  * @return
 411  *   0 on success.
 412  */
 413 int
 414 mlx5_traffic_restart(struct rte_eth_dev *dev)
 415 {
 416         struct priv *priv = dev->data->dev_private;
 417
 418         priv_lock(priv);
 419         priv_dev_traffic_restart(priv, dev);
 420         priv_unlock(priv);
 421         return 0;
 422 }