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         dev->data->dev_started = 1;
 136         priv_lock(priv);
 137         err = priv_flow_create_drop_queue(priv);
 138         if (err) {
 139                 ERROR("%p: Drop queue allocation failed: %s",
 140                       (void *)dev, strerror(err));
 141                 goto error;
 142         }
 143         DEBUG("%p: allocating and configuring hash RX queues", (void *)dev);
 144         rte_mempool_walk(mlx5_mp2mr_iter, priv);
 145         err = priv_txq_start(priv);
 146         if (err) {
 147                 ERROR("%p: TXQ allocation failed: %s",
 148                       (void *)dev, strerror(err));
 149                 goto error;
 150         }
 151         /* Update send callback. */
 152         priv_dev_select_tx_function(priv, dev);
 153         err = priv_rxq_start(priv);
 154         if (err) {
 155                 ERROR("%p: RXQ allocation failed: %s",
 156                       (void *)dev, strerror(err));
 157                 goto error;
 158         }
 159         /* Update receive callback. */
 160         priv_dev_select_rx_function(priv, dev);
 161         err = priv_dev_traffic_enable(priv, dev);
 162         if (err) {
 163                 ERROR("%p: an error occurred while configuring control flows:"
 164                       " %s",
 165                       (void *)priv, strerror(err));
 166                 goto error;
 167         }
 168         err = priv_flow_start(priv, &priv->flows);
 169         if (err) {
 170                 ERROR("%p: an error occurred while configuring flows:"
 171                       " %s",
 172                       (void *)priv, strerror(err));
 173                 goto error;
 174         }
 175         err = priv_rx_intr_vec_enable(priv);
 176         if (err) {
 177                 ERROR("%p: RX interrupt vector creation failed",
 178                       (void *)priv);
 179                 goto error;
 180         }
 181         priv_dev_interrupt_handler_install(priv, dev);
 182         priv_xstats_init(priv);
 183         priv_unlock(priv);
 184         return 0;
 185 error:
 186         /* Rollback. */
 187         dev->data->dev_started = 0;
 188         for (mr = LIST_FIRST(&priv->mr); mr; mr = LIST_FIRST(&priv->mr))
 189                 priv_mr_release(priv, mr);
 190         priv_flow_stop(priv, &priv->flows);
 191         priv_dev_traffic_disable(priv, dev);
 192         priv_txq_stop(priv);
 193         priv_rxq_stop(priv);
 194         priv_flow_delete_drop_queue(priv);
 195         priv_unlock(priv);
 196         return -err;
 197 }
 198
 199 /**
 200  * DPDK callback to stop the device.
 201  *
 202  * Simulate device stop by detaching all configured flows.
 203  *
 204  * @param dev
 205  *   Pointer to Ethernet device structure.
 206  */
 207 void
 208 mlx5_dev_stop(struct rte_eth_dev *dev)
 209 {
 210         struct priv *priv = dev->data->dev_private;
 211         struct mlx5_mr *mr;
 212
 213         priv_lock(priv);
 214         dev->data->dev_started = 0;
 215         /* Prevent crashes when queues are still in use. */
 216         dev->rx_pkt_burst = removed_rx_burst;
 217         dev->tx_pkt_burst = removed_tx_burst;
 218         rte_wmb();
 219         usleep(1000 * priv->rxqs_n);
 220         DEBUG("%p: cleaning up and destroying hash RX queues", (void *)dev);
 221         priv_flow_stop(priv, &priv->flows);
 222         priv_dev_traffic_disable(priv, dev);
 223         priv_rx_intr_vec_disable(priv);
 224         priv_dev_interrupt_handler_uninstall(priv, dev);
 225         priv_txq_stop(priv);
 226         priv_rxq_stop(priv);
 227         for (mr = LIST_FIRST(&priv->mr); mr; mr = LIST_FIRST(&priv->mr))
 228                 priv_mr_release(priv, mr);
 229         priv_flow_delete_drop_queue(priv);
 230         priv_unlock(priv);
 231 }
 232
 233 /**
 234  * Enable traffic flows configured by control plane
 235  *
 236  * @param priv
 237  *   Pointer to Ethernet device private data.
 238  * @param dev
 239  *   Pointer to Ethernet device structure.
 240  *
 241  * @return
 242  *   0 on success.
 243  */
 244 int
 245 priv_dev_traffic_enable(struct priv *priv, struct rte_eth_dev *dev)
 246 {
 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                 claim_zero(mlx5_ctrl_flow(dev, &promisc, &promisc));
 280                 return 0;
 281         }
 282         if (dev->data->all_multicast) {
 283                 struct rte_flow_item_eth multicast = {
 284                         .dst.addr_bytes = "\x01\x00\x00\x00\x00\x00",
 285                         .src.addr_bytes = "\x00\x00\x00\x00\x00\x00",
 286                         .type = 0,
 287                 };
 288
 289                 claim_zero(mlx5_ctrl_flow(dev, &multicast, &multicast));
 290         } else {
 291                 /* Add broadcast/multicast flows. */
 292                 for (i = 0; i != vlan_filter_n; ++i) {
 293                         uint16_t vlan = priv->vlan_filter[i];
 294
 295                         struct rte_flow_item_vlan vlan_spec = {
 296                                 .tci = rte_cpu_to_be_16(vlan),
 297                         };
 298                         struct rte_flow_item_vlan vlan_mask = {
 299                                 .tci = 0xffff,
 300                         };
 301
 302                         ret = mlx5_ctrl_flow_vlan(dev, &bcast, &bcast,
 303                                                   &vlan_spec, &vlan_mask);
 304                         if (ret)
 305                                 goto error;
 306                         ret = mlx5_ctrl_flow_vlan(dev, &ipv6_multi_spec,
 307                                                   &ipv6_multi_mask,
 308                                                   &vlan_spec, &vlan_mask);
 309                         if (ret)
 310                                 goto error;
 311                 }
 312                 if (!vlan_filter_n) {
 313                         ret = mlx5_ctrl_flow(dev, &bcast, &bcast);
 314                         if (ret)
 315                                 goto error;
 316                         ret = mlx5_ctrl_flow(dev, &ipv6_multi_spec,
 317                                              &ipv6_multi_mask);
 318                         if (ret)
 319                                 goto error;
 320                 }
 321         }
 322         /* Add MAC address flows. */
 323         for (i = 0; i != MLX5_MAX_MAC_ADDRESSES; ++i) {
 324                 struct ether_addr *mac = &dev->data->mac_addrs[i];
 325
 326                 if (!memcmp(mac, &cmp, sizeof(*mac)))
 327                         continue;
 328                 memcpy(&unicast.dst.addr_bytes,
 329                        mac->addr_bytes,
 330                        ETHER_ADDR_LEN);
 331                 for (j = 0; j != vlan_filter_n; ++j) {
 332                         uint16_t vlan = priv->vlan_filter[j];
 333
 334                         struct rte_flow_item_vlan vlan_spec = {
 335                                 .tci = rte_cpu_to_be_16(vlan),
 336                         };
 337                         struct rte_flow_item_vlan vlan_mask = {
 338                                 .tci = 0xffff,
 339                         };
 340
 341                         ret = mlx5_ctrl_flow_vlan(dev, &unicast,
 342                                                   &unicast_mask,
 343                                                   &vlan_spec,
 344                                                   &vlan_mask);
 345                         if (ret)
 346                                 goto error;
 347                 }
 348                 if (!vlan_filter_n) {
 349                         ret = mlx5_ctrl_flow(dev, &unicast,
 350                                              &unicast_mask);
 351                         if (ret)
 352                                 goto error;
 353                 }
 354         }
 355         return 0;
 356 error:
 357         return rte_errno;
 358 }
 359
 360
 361 /**
 362  * Disable traffic flows configured by control plane
 363  *
 364  * @param priv
 365  *   Pointer to Ethernet device private data.
 366  * @param dev
 367  *   Pointer to Ethernet device structure.
 368  *
 369  * @return
 370  *   0 on success.
 371  */
 372 int
 373 priv_dev_traffic_disable(struct priv *priv, struct rte_eth_dev *dev)
 374 {
 375         (void)dev;
 376         priv_flow_flush(priv, &priv->ctrl_flows);
 377         return 0;
 378 }
 379
 380 /**
 381  * Restart traffic flows configured by control plane
 382  *
 383  * @param priv
 384  *   Pointer to Ethernet device private data.
 385  * @param dev
 386  *   Pointer to Ethernet device structure.
 387  *
 388  * @return
 389  *   0 on success.
 390  */
 391 int
 392 priv_dev_traffic_restart(struct priv *priv, struct rte_eth_dev *dev)
 393 {
 394         if (dev->data->dev_started) {
 395                 priv_dev_traffic_disable(priv, dev);
 396                 priv_dev_traffic_enable(priv, dev);
 397         }
 398         return 0;
 399 }
 400
 401 /**
 402  * Restart traffic flows configured by control plane
 403  *
 404  * @param dev
 405  *   Pointer to Ethernet device structure.
 406  *
 407  * @return
 408  *   0 on success.
 409  */
 410 int
 411 mlx5_traffic_restart(struct rte_eth_dev *dev)
 412 {
 413         struct priv *priv = dev->data->dev_private;
 414
 415         priv_lock(priv);
 416         priv_dev_traffic_restart(priv, dev);
 417         priv_unlock(priv);
 418         return 0;
 419 }