drivers/net/failsafe/failsafe_ether.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright 2017 6WIND S.A.
   5  *   Copyright 2017 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
  34 #include <unistd.h>
  35
  36 #include <rte_flow.h>
  37 #include <rte_flow_driver.h>
  38
  39 #include "failsafe_private.h"
  40
  41 /** Print a message out of a flow error. */
  42 static int
  43 fs_flow_complain(struct rte_flow_error *error)
  44 {
  45         static const char *const errstrlist[] = {
  46                 [RTE_FLOW_ERROR_TYPE_NONE] = "no error",
  47                 [RTE_FLOW_ERROR_TYPE_UNSPECIFIED] = "cause unspecified",
  48                 [RTE_FLOW_ERROR_TYPE_HANDLE] = "flow rule (handle)",
  49                 [RTE_FLOW_ERROR_TYPE_ATTR_GROUP] = "group field",
  50                 [RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY] = "priority field",
  51                 [RTE_FLOW_ERROR_TYPE_ATTR_INGRESS] = "ingress field",
  52                 [RTE_FLOW_ERROR_TYPE_ATTR_EGRESS] = "egress field",
  53                 [RTE_FLOW_ERROR_TYPE_ATTR] = "attributes structure",
  54                 [RTE_FLOW_ERROR_TYPE_ITEM_NUM] = "pattern length",
  55                 [RTE_FLOW_ERROR_TYPE_ITEM] = "specific pattern item",
  56                 [RTE_FLOW_ERROR_TYPE_ACTION_NUM] = "number of actions",
  57                 [RTE_FLOW_ERROR_TYPE_ACTION] = "specific action",
  58         };
  59         const char *errstr;
  60         char buf[32];
  61         int err = rte_errno;
  62
  63         if ((unsigned int)error->type >= RTE_DIM(errstrlist) ||
  64                         !errstrlist[error->type])
  65                 errstr = "unknown type";
  66         else
  67                 errstr = errstrlist[error->type];
  68         ERROR("Caught error type %d (%s): %s%s\n",
  69                 error->type, errstr,
  70                 error->cause ? (snprintf(buf, sizeof(buf), "cause: %p, ",
  71                                 error->cause), buf) : "",
  72                 error->message ? error->message : "(no stated reason)");
  73         return -err;
  74 }
  75
  76 static int
  77 eth_dev_flow_isolate_set(struct rte_eth_dev *dev,
  78                          struct sub_device *sdev)
  79 {
  80         struct rte_flow_error ferror;
  81         int ret;
  82
  83         if (!PRIV(dev)->flow_isolated) {
  84                 DEBUG("Flow isolation already disabled");
  85         } else {
  86                 DEBUG("Enabling flow isolation");
  87                 ret = rte_flow_isolate(PORT_ID(sdev),
  88                                        PRIV(dev)->flow_isolated,
  89                                        &ferror);
  90                 if (ret) {
  91                         fs_flow_complain(&ferror);
  92                         return ret;
  93                 }
  94         }
  95         return 0;
  96 }
  97
  98 static int
  99 fs_eth_dev_conf_apply(struct rte_eth_dev *dev,
 100                 struct sub_device *sdev)
 101 {
 102         struct rte_eth_dev *edev;
 103         struct rte_vlan_filter_conf *vfc1;
 104         struct rte_vlan_filter_conf *vfc2;
 105         struct rte_flow *flow;
 106         struct rte_flow_error ferror;
 107         uint32_t i;
 108         int ret;
 109
 110         edev = ETH(sdev);
 111         /* RX queue setup */
 112         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 113                 struct rxq *rxq;
 114
 115                 rxq = dev->data->rx_queues[i];
 116                 ret = rte_eth_rx_queue_setup(PORT_ID(sdev), i,
 117                                 rxq->info.nb_desc, rxq->socket_id,
 118                                 &rxq->info.conf, rxq->info.mp);
 119                 if (ret) {
 120                         ERROR("rx_queue_setup failed");
 121                         return ret;
 122                 }
 123         }
 124         /* TX queue setup */
 125         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 126                 struct txq *txq;
 127
 128                 txq = dev->data->tx_queues[i];
 129                 ret = rte_eth_tx_queue_setup(PORT_ID(sdev), i,
 130                                 txq->info.nb_desc, txq->socket_id,
 131                                 &txq->info.conf);
 132                 if (ret) {
 133                         ERROR("tx_queue_setup failed");
 134                         return ret;
 135                 }
 136         }
 137         /* dev_link.link_status */
 138         if (dev->data->dev_link.link_status !=
 139             edev->data->dev_link.link_status) {
 140                 DEBUG("Configuring link_status");
 141                 if (dev->data->dev_link.link_status)
 142                         ret = rte_eth_dev_set_link_up(PORT_ID(sdev));
 143                 else
 144                         ret = rte_eth_dev_set_link_down(PORT_ID(sdev));
 145                 if (ret) {
 146                         ERROR("Failed to apply link_status");
 147                         return ret;
 148                 }
 149         } else {
 150                 DEBUG("link_status already set");
 151         }
 152         /* promiscuous */
 153         if (dev->data->promiscuous != edev->data->promiscuous) {
 154                 DEBUG("Configuring promiscuous");
 155                 if (dev->data->promiscuous)
 156                         rte_eth_promiscuous_enable(PORT_ID(sdev));
 157                 else
 158                         rte_eth_promiscuous_disable(PORT_ID(sdev));
 159         } else {
 160                 DEBUG("promiscuous already set");
 161         }
 162         /* all_multicast */
 163         if (dev->data->all_multicast != edev->data->all_multicast) {
 164                 DEBUG("Configuring all_multicast");
 165                 if (dev->data->all_multicast)
 166                         rte_eth_allmulticast_enable(PORT_ID(sdev));
 167                 else
 168                         rte_eth_allmulticast_disable(PORT_ID(sdev));
 169         } else {
 170                 DEBUG("all_multicast already set");
 171         }
 172         /* MTU */
 173         if (dev->data->mtu != edev->data->mtu) {
 174                 DEBUG("Configuring MTU");
 175                 ret = rte_eth_dev_set_mtu(PORT_ID(sdev), dev->data->mtu);
 176                 if (ret) {
 177                         ERROR("Failed to apply MTU");
 178                         return ret;
 179                 }
 180         } else {
 181                 DEBUG("MTU already set");
 182         }
 183         /* default MAC */
 184         DEBUG("Configuring default MAC address");
 185         ret = rte_eth_dev_default_mac_addr_set(PORT_ID(sdev),
 186                         &dev->data->mac_addrs[0]);
 187         if (ret) {
 188                 ERROR("Setting default MAC address failed");
 189                 return ret;
 190         }
 191         /* additional MAC */
 192         if (PRIV(dev)->nb_mac_addr > 1)
 193                 DEBUG("Configure additional MAC address%s",
 194                         (PRIV(dev)->nb_mac_addr > 2 ? "es" : ""));
 195         for (i = 1; i < PRIV(dev)->nb_mac_addr; i++) {
 196                 struct ether_addr *ea;
 197
 198                 ea = &dev->data->mac_addrs[i];
 199                 ret = rte_eth_dev_mac_addr_add(PORT_ID(sdev), ea,
 200                                 PRIV(dev)->mac_addr_pool[i]);
 201                 if (ret) {
 202                         char ea_fmt[ETHER_ADDR_FMT_SIZE];
 203
 204                         ether_format_addr(ea_fmt, ETHER_ADDR_FMT_SIZE, ea);
 205                         ERROR("Adding MAC address %s failed", ea_fmt);
 206                         return ret;
 207                 }
 208         }
 209         /* VLAN filter */
 210         vfc1 = &dev->data->vlan_filter_conf;
 211         vfc2 = &edev->data->vlan_filter_conf;
 212         if (memcmp(vfc1, vfc2, sizeof(struct rte_vlan_filter_conf))) {
 213                 uint64_t vbit;
 214                 uint64_t ids;
 215                 size_t i;
 216                 uint16_t vlan_id;
 217
 218                 DEBUG("Configuring VLAN filter");
 219                 for (i = 0; i < RTE_DIM(vfc1->ids); i++) {
 220                         if (vfc1->ids[i] == 0)
 221                                 continue;
 222                         ids = vfc1->ids[i];
 223                         while (ids) {
 224                                 vlan_id = 64 * i;
 225                                 /* count trailing zeroes */
 226                                 vbit = ~ids & (ids - 1);
 227                                 /* clear least significant bit set */
 228                                 ids ^= (ids ^ (ids - 1)) ^ vbit;
 229                                 for (; vbit; vlan_id++)
 230                                         vbit >>= 1;
 231                                 ret = rte_eth_dev_vlan_filter(
 232                                         PORT_ID(sdev), vlan_id, 1);
 233                                 if (ret) {
 234                                         ERROR("Failed to apply VLAN filter %hu",
 235                                                 vlan_id);
 236                                         return ret;
 237                                 }
 238                         }
 239                 }
 240         } else {
 241                 DEBUG("VLAN filter already set");
 242         }
 243         /* rte_flow */
 244         if (TAILQ_EMPTY(&PRIV(dev)->flow_list)) {
 245                 DEBUG("rte_flow already set");
 246         } else {
 247                 DEBUG("Resetting rte_flow configuration");
 248                 ret = rte_flow_flush(PORT_ID(sdev), &ferror);
 249                 if (ret) {
 250                         fs_flow_complain(&ferror);
 251                         return ret;
 252                 }
 253                 i = 0;
 254                 rte_errno = 0;
 255                 DEBUG("Configuring rte_flow");
 256                 TAILQ_FOREACH(flow, &PRIV(dev)->flow_list, next) {
 257                         DEBUG("Creating flow #%" PRIu32, i++);
 258                         flow->flows[SUB_ID(sdev)] =
 259                                 rte_flow_create(PORT_ID(sdev),
 260                                                 &flow->fd->attr,
 261                                                 flow->fd->items,
 262                                                 flow->fd->actions,
 263                                                 &ferror);
 264                         ret = rte_errno;
 265                         if (ret)
 266                                 break;
 267                 }
 268                 if (ret) {
 269                         fs_flow_complain(&ferror);
 270                         return ret;
 271                 }
 272         }
 273         return 0;
 274 }
 275
 276 static void
 277 fs_dev_remove(struct sub_device *sdev)
 278 {
 279         int ret;
 280
 281         if (sdev == NULL)
 282                 return;
 283         switch (sdev->state) {
 284         case DEV_STARTED:
 285                 rte_eth_dev_stop(PORT_ID(sdev));
 286                 sdev->state = DEV_ACTIVE;
 287                 /* fallthrough */
 288         case DEV_ACTIVE:
 289                 rte_eth_dev_close(PORT_ID(sdev));
 290                 sdev->state = DEV_PROBED;
 291                 /* fallthrough */
 292         case DEV_PROBED:
 293                 ret = rte_eal_hotplug_remove(sdev->bus->name,
 294                                              sdev->dev->name);
 295                 if (ret) {
 296                         ERROR("Bus detach failed for sub_device %u",
 297                               SUB_ID(sdev));
 298                 } else {
 299                         ETH(sdev)->state = RTE_ETH_DEV_UNUSED;
 300                 }
 301                 sdev->state = DEV_PARSED;
 302                 /* fallthrough */
 303         case DEV_PARSED:
 304         case DEV_UNDEFINED:
 305                 sdev->state = DEV_UNDEFINED;
 306                 /* the end */
 307                 break;
 308         }
 309         failsafe_hotplug_alarm_install(sdev->fs_dev);
 310 }
 311
 312 static void
 313 fs_dev_stats_save(struct sub_device *sdev)
 314 {
 315         struct rte_eth_stats stats;
 316         int err;
 317
 318         /* Attempt to read current stats. */
 319         err = rte_eth_stats_get(PORT_ID(sdev), &stats);
 320         if (err)
 321                 WARN("Could not access latest statistics from sub-device %d,"
 322                          " using latest snapshot.\n", SUB_ID(sdev));
 323         failsafe_stats_increment(&PRIV(sdev->fs_dev)->stats_accumulator,
 324                         err ? &sdev->stats_snapshot : &stats);
 325         memset(&sdev->stats_snapshot, 0, sizeof(struct rte_eth_stats));
 326 }
 327
 328 static inline int
 329 fs_rxtx_clean(struct sub_device *sdev)
 330 {
 331         uint16_t i;
 332
 333         for (i = 0; i < ETH(sdev)->data->nb_rx_queues; i++)
 334                 if (FS_ATOMIC_RX(sdev, i))
 335                         return 0;
 336         for (i = 0; i < ETH(sdev)->data->nb_tx_queues; i++)
 337                 if (FS_ATOMIC_TX(sdev, i))
 338                         return 0;
 339         return 1;
 340 }
 341
 342 void
 343 failsafe_dev_remove(struct rte_eth_dev *dev)
 344 {
 345         struct sub_device *sdev;
 346         uint8_t i;
 347
 348         FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE)
 349                 if (sdev->remove && fs_rxtx_clean(sdev)) {
 350                         fs_dev_stats_save(sdev);
 351                         fs_dev_remove(sdev);
 352                 }
 353 }
 354
 355 int
 356 failsafe_eth_dev_state_sync(struct rte_eth_dev *dev)
 357 {
 358         struct sub_device *sdev;
 359         uint32_t inactive;
 360         int ret;
 361         uint8_t i;
 362
 363         if (PRIV(dev)->state < DEV_PARSED)
 364                 return 0;
 365
 366         ret = failsafe_args_parse_subs(dev);
 367         if (ret)
 368                 goto err_remove;
 369
 370         if (PRIV(dev)->state < DEV_PROBED)
 371                 return 0;
 372         ret = failsafe_eal_init(dev);
 373         if (ret)
 374                 goto err_remove;
 375         if (PRIV(dev)->state < DEV_ACTIVE)
 376                 return 0;
 377         inactive = 0;
 378         FOREACH_SUBDEV(sdev, i, dev) {
 379                 if (sdev->state == DEV_PROBED) {
 380                         inactive |= UINT32_C(1) << i;
 381                         ret = eth_dev_flow_isolate_set(dev, sdev);
 382                         if (ret) {
 383                                 ERROR("Could not apply configuration to sub_device %d",
 384                                       i);
 385                                 goto err_remove;
 386                         }
 387                 }
 388         }
 389         ret = dev->dev_ops->dev_configure(dev);
 390         if (ret)
 391                 goto err_remove;
 392         FOREACH_SUBDEV(sdev, i, dev) {
 393                 if (inactive & (UINT32_C(1) << i)) {
 394                         ret = fs_eth_dev_conf_apply(dev, sdev);
 395                         if (ret) {
 396                                 ERROR("Could not apply configuration to sub_device %d",
 397                                       i);
 398                                 goto err_remove;
 399                         }
 400                 }
 401         }
 402         /*
 403          * If new devices have been configured, check if
 404          * the link state has changed.
 405          */
 406         if (inactive)
 407                 dev->dev_ops->link_update(dev, 1);
 408         if (PRIV(dev)->state < DEV_STARTED)
 409                 return 0;
 410         ret = dev->dev_ops->dev_start(dev);
 411         if (ret)
 412                 goto err_remove;
 413         return 0;
 414 err_remove:
 415         FOREACH_SUBDEV(sdev, i, dev)
 416                 if (sdev->state != PRIV(dev)->state)
 417                         sdev->remove = 1;
 418         return ret;
 419 }
 420
 421 void
 422 failsafe_stats_increment(struct rte_eth_stats *to, struct rte_eth_stats *from)
 423 {
 424         uint32_t i;
 425
 426         RTE_ASSERT(to != NULL && from != NULL);
 427         to->ipackets += from->ipackets;
 428         to->opackets += from->opackets;
 429         to->ibytes += from->ibytes;
 430         to->obytes += from->obytes;
 431         to->imissed += from->imissed;
 432         to->ierrors += from->ierrors;
 433         to->oerrors += from->oerrors;
 434         to->rx_nombuf += from->rx_nombuf;
 435         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS; i++) {
 436                 to->q_ipackets[i] += from->q_ipackets[i];
 437                 to->q_opackets[i] += from->q_opackets[i];
 438                 to->q_ibytes[i] += from->q_ibytes[i];
 439                 to->q_obytes[i] += from->q_obytes[i];
 440                 to->q_errors[i] += from->q_errors[i];
 441         }
 442 }
 443
 444 int
 445 failsafe_eth_rmv_event_callback(uint16_t port_id __rte_unused,
 446                                 enum rte_eth_event_type event __rte_unused,
 447                                 void *cb_arg, void *out __rte_unused)
 448 {
 449         struct sub_device *sdev = cb_arg;
 450
 451         /* Switch as soon as possible tx_dev. */
 452         fs_switch_dev(sdev->fs_dev, sdev);
 453         /* Use safe bursts in any case. */
 454         set_burst_fn(sdev->fs_dev, 1);
 455         /*
 456          * Async removal, the sub-PMD will try to unregister
 457          * the callback at the source of the current thread context.
 458          */
 459         sdev->remove = 1;
 460         return 0;
 461 }
 462
 463 int
 464 failsafe_eth_lsc_event_callback(uint16_t port_id __rte_unused,
 465                                 enum rte_eth_event_type event __rte_unused,
 466                                 void *cb_arg, void *out __rte_unused)
 467 {
 468         struct rte_eth_dev *dev = cb_arg;
 469         int ret;
 470
 471         ret = dev->dev_ops->link_update(dev, 0);
 472         /* We must pass on the LSC event */
 473         if (ret)
 474                 return _rte_eth_dev_callback_process(dev,
 475                                                      RTE_ETH_EVENT_INTR_LSC,
 476                                                      NULL, NULL);
 477         else
 478                 return 0;
 479 }