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 #include <rte_cycles.h>
  39
  40 #include "failsafe_private.h"
  41
  42 /** Print a message out of a flow error. */
  43 static int
  44 fs_flow_complain(struct rte_flow_error *error)
  45 {
  46         static const char *const errstrlist[] = {
  47                 [RTE_FLOW_ERROR_TYPE_NONE] = "no error",
  48                 [RTE_FLOW_ERROR_TYPE_UNSPECIFIED] = "cause unspecified",
  49                 [RTE_FLOW_ERROR_TYPE_HANDLE] = "flow rule (handle)",
  50                 [RTE_FLOW_ERROR_TYPE_ATTR_GROUP] = "group field",
  51                 [RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY] = "priority field",
  52                 [RTE_FLOW_ERROR_TYPE_ATTR_INGRESS] = "ingress field",
  53                 [RTE_FLOW_ERROR_TYPE_ATTR_EGRESS] = "egress field",
  54                 [RTE_FLOW_ERROR_TYPE_ATTR] = "attributes structure",
  55                 [RTE_FLOW_ERROR_TYPE_ITEM_NUM] = "pattern length",
  56                 [RTE_FLOW_ERROR_TYPE_ITEM] = "specific pattern item",
  57                 [RTE_FLOW_ERROR_TYPE_ACTION_NUM] = "number of actions",
  58                 [RTE_FLOW_ERROR_TYPE_ACTION] = "specific action",
  59         };
  60         const char *errstr;
  61         char buf[32];
  62         int err = rte_errno;
  63
  64         if ((unsigned int)error->type >= RTE_DIM(errstrlist) ||
  65                         !errstrlist[error->type])
  66                 errstr = "unknown type";
  67         else
  68                 errstr = errstrlist[error->type];
  69         ERROR("Caught error type %d (%s): %s%s\n",
  70                 error->type, errstr,
  71                 error->cause ? (snprintf(buf, sizeof(buf), "cause: %p, ",
  72                                 error->cause), buf) : "",
  73                 error->message ? error->message : "(no stated reason)");
  74         return -err;
  75 }
  76
  77 static int
  78 eth_dev_flow_isolate_set(struct rte_eth_dev *dev,
  79                          struct sub_device *sdev)
  80 {
  81         struct rte_flow_error ferror;
  82         int ret;
  83
  84         if (!PRIV(dev)->flow_isolated) {
  85                 DEBUG("Flow isolation already disabled");
  86         } else {
  87                 DEBUG("Enabling flow isolation");
  88                 ret = rte_flow_isolate(PORT_ID(sdev),
  89                                        PRIV(dev)->flow_isolated,
  90                                        &ferror);
  91                 if (ret) {
  92                         fs_flow_complain(&ferror);
  93                         return ret;
  94                 }
  95         }
  96         return 0;
  97 }
  98
  99 static int
 100 fs_eth_dev_conf_apply(struct rte_eth_dev *dev,
 101                 struct sub_device *sdev)
 102 {
 103         struct rte_eth_dev *edev;
 104         struct rte_vlan_filter_conf *vfc1;
 105         struct rte_vlan_filter_conf *vfc2;
 106         struct rte_flow *flow;
 107         struct rte_flow_error ferror;
 108         uint32_t i;
 109         int ret;
 110
 111         edev = ETH(sdev);
 112         /* RX queue setup */
 113         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 114                 struct rxq *rxq;
 115
 116                 rxq = dev->data->rx_queues[i];
 117                 ret = rte_eth_rx_queue_setup(PORT_ID(sdev), i,
 118                                 rxq->info.nb_desc, rxq->socket_id,
 119                                 &rxq->info.conf, rxq->info.mp);
 120                 if (ret) {
 121                         ERROR("rx_queue_setup failed");
 122                         return ret;
 123                 }
 124         }
 125         /* TX queue setup */
 126         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 127                 struct txq *txq;
 128
 129                 txq = dev->data->tx_queues[i];
 130                 ret = rte_eth_tx_queue_setup(PORT_ID(sdev), i,
 131                                 txq->info.nb_desc, txq->socket_id,
 132                                 &txq->info.conf);
 133                 if (ret) {
 134                         ERROR("tx_queue_setup failed");
 135                         return ret;
 136                 }
 137         }
 138         /* dev_link.link_status */
 139         if (dev->data->dev_link.link_status !=
 140             edev->data->dev_link.link_status) {
 141                 DEBUG("Configuring link_status");
 142                 if (dev->data->dev_link.link_status)
 143                         ret = rte_eth_dev_set_link_up(PORT_ID(sdev));
 144                 else
 145                         ret = rte_eth_dev_set_link_down(PORT_ID(sdev));
 146                 if (ret) {
 147                         ERROR("Failed to apply link_status");
 148                         return ret;
 149                 }
 150         } else {
 151                 DEBUG("link_status already set");
 152         }
 153         /* promiscuous */
 154         if (dev->data->promiscuous != edev->data->promiscuous) {
 155                 DEBUG("Configuring promiscuous");
 156                 if (dev->data->promiscuous)
 157                         rte_eth_promiscuous_enable(PORT_ID(sdev));
 158                 else
 159                         rte_eth_promiscuous_disable(PORT_ID(sdev));
 160         } else {
 161                 DEBUG("promiscuous already set");
 162         }
 163         /* all_multicast */
 164         if (dev->data->all_multicast != edev->data->all_multicast) {
 165                 DEBUG("Configuring all_multicast");
 166                 if (dev->data->all_multicast)
 167                         rte_eth_allmulticast_enable(PORT_ID(sdev));
 168                 else
 169                         rte_eth_allmulticast_disable(PORT_ID(sdev));
 170         } else {
 171                 DEBUG("all_multicast already set");
 172         }
 173         /* MTU */
 174         if (dev->data->mtu != edev->data->mtu) {
 175                 DEBUG("Configuring MTU");
 176                 ret = rte_eth_dev_set_mtu(PORT_ID(sdev), dev->data->mtu);
 177                 if (ret) {
 178                         ERROR("Failed to apply MTU");
 179                         return ret;
 180                 }
 181         } else {
 182                 DEBUG("MTU already set");
 183         }
 184         /* default MAC */
 185         DEBUG("Configuring default MAC address");
 186         ret = rte_eth_dev_default_mac_addr_set(PORT_ID(sdev),
 187                         &dev->data->mac_addrs[0]);
 188         if (ret) {
 189                 ERROR("Setting default MAC address failed");
 190                 return ret;
 191         }
 192         /* additional MAC */
 193         if (PRIV(dev)->nb_mac_addr > 1)
 194                 DEBUG("Configure additional MAC address%s",
 195                         (PRIV(dev)->nb_mac_addr > 2 ? "es" : ""));
 196         for (i = 1; i < PRIV(dev)->nb_mac_addr; i++) {
 197                 struct ether_addr *ea;
 198
 199                 ea = &dev->data->mac_addrs[i];
 200                 ret = rte_eth_dev_mac_addr_add(PORT_ID(sdev), ea,
 201                                 PRIV(dev)->mac_addr_pool[i]);
 202                 if (ret) {
 203                         char ea_fmt[ETHER_ADDR_FMT_SIZE];
 204
 205                         ether_format_addr(ea_fmt, ETHER_ADDR_FMT_SIZE, ea);
 206                         ERROR("Adding MAC address %s failed", ea_fmt);
 207                         return ret;
 208                 }
 209         }
 210         /* VLAN filter */
 211         vfc1 = &dev->data->vlan_filter_conf;
 212         vfc2 = &edev->data->vlan_filter_conf;
 213         if (memcmp(vfc1, vfc2, sizeof(struct rte_vlan_filter_conf))) {
 214                 uint64_t vbit;
 215                 uint64_t ids;
 216                 size_t i;
 217                 uint16_t vlan_id;
 218
 219                 DEBUG("Configuring VLAN filter");
 220                 for (i = 0; i < RTE_DIM(vfc1->ids); i++) {
 221                         if (vfc1->ids[i] == 0)
 222                                 continue;
 223                         ids = vfc1->ids[i];
 224                         while (ids) {
 225                                 vlan_id = 64 * i;
 226                                 /* count trailing zeroes */
 227                                 vbit = ~ids & (ids - 1);
 228                                 /* clear least significant bit set */
 229                                 ids ^= (ids ^ (ids - 1)) ^ vbit;
 230                                 for (; vbit; vlan_id++)
 231                                         vbit >>= 1;
 232                                 ret = rte_eth_dev_vlan_filter(
 233                                         PORT_ID(sdev), vlan_id, 1);
 234                                 if (ret) {
 235                                         ERROR("Failed to apply VLAN filter %hu",
 236                                                 vlan_id);
 237                                         return ret;
 238                                 }
 239                         }
 240                 }
 241         } else {
 242                 DEBUG("VLAN filter already set");
 243         }
 244         /* rte_flow */
 245         if (TAILQ_EMPTY(&PRIV(dev)->flow_list)) {
 246                 DEBUG("rte_flow already set");
 247         } else {
 248                 DEBUG("Resetting rte_flow configuration");
 249                 ret = rte_flow_flush(PORT_ID(sdev), &ferror);
 250                 if (ret) {
 251                         fs_flow_complain(&ferror);
 252                         return ret;
 253                 }
 254                 i = 0;
 255                 rte_errno = 0;
 256                 DEBUG("Configuring rte_flow");
 257                 TAILQ_FOREACH(flow, &PRIV(dev)->flow_list, next) {
 258                         DEBUG("Creating flow #%" PRIu32, i++);
 259                         flow->flows[SUB_ID(sdev)] =
 260                                 rte_flow_create(PORT_ID(sdev),
 261                                                 &flow->fd->attr,
 262                                                 flow->fd->items,
 263                                                 flow->fd->actions,
 264                                                 &ferror);
 265                         ret = rte_errno;
 266                         if (ret)
 267                                 break;
 268                 }
 269                 if (ret) {
 270                         fs_flow_complain(&ferror);
 271                         return ret;
 272                 }
 273         }
 274         return 0;
 275 }
 276
 277 static void
 278 fs_dev_remove(struct sub_device *sdev)
 279 {
 280         int ret;
 281
 282         if (sdev == NULL)
 283                 return;
 284         switch (sdev->state) {
 285         case DEV_STARTED:
 286                 rte_eth_dev_stop(PORT_ID(sdev));
 287                 sdev->state = DEV_ACTIVE;
 288                 /* fallthrough */
 289         case DEV_ACTIVE:
 290                 rte_eth_dev_close(PORT_ID(sdev));
 291                 sdev->state = DEV_PROBED;
 292                 /* fallthrough */
 293         case DEV_PROBED:
 294                 ret = rte_eal_hotplug_remove(sdev->bus->name,
 295                                              sdev->dev->name);
 296                 if (ret) {
 297                         ERROR("Bus detach failed for sub_device %u",
 298                               SUB_ID(sdev));
 299                 } else {
 300                         ETH(sdev)->state = RTE_ETH_DEV_UNUSED;
 301                 }
 302                 sdev->state = DEV_PARSED;
 303                 /* fallthrough */
 304         case DEV_PARSED:
 305         case DEV_UNDEFINED:
 306                 sdev->state = DEV_UNDEFINED;
 307                 /* the end */
 308                 break;
 309         }
 310         failsafe_hotplug_alarm_install(sdev->fs_dev);
 311 }
 312
 313 static void
 314 fs_dev_stats_save(struct sub_device *sdev)
 315 {
 316         struct rte_eth_stats stats;
 317         int err;
 318
 319         /* Attempt to read current stats. */
 320         err = rte_eth_stats_get(PORT_ID(sdev), &stats);
 321         if (err) {
 322                 uint64_t timestamp = sdev->stats_snapshot.timestamp;
 323
 324                 WARN("Could not access latest statistics from sub-device %d.\n",
 325                          SUB_ID(sdev));
 326                 if (timestamp != 0)
 327                         WARN("Using latest snapshot taken before %"PRIu64" seconds.\n",
 328                                  (rte_rdtsc() - timestamp) / rte_get_tsc_hz());
 329         }
 330         failsafe_stats_increment(&PRIV(sdev->fs_dev)->stats_accumulator,
 331                         err ? &sdev->stats_snapshot.stats : &stats);
 332         memset(&sdev->stats_snapshot, 0, sizeof(sdev->stats_snapshot));
 333 }
 334
 335 static inline int
 336 fs_rxtx_clean(struct sub_device *sdev)
 337 {
 338         uint16_t i;
 339
 340         for (i = 0; i < ETH(sdev)->data->nb_rx_queues; i++)
 341                 if (FS_ATOMIC_RX(sdev, i))
 342                         return 0;
 343         for (i = 0; i < ETH(sdev)->data->nb_tx_queues; i++)
 344                 if (FS_ATOMIC_TX(sdev, i))
 345                         return 0;
 346         return 1;
 347 }
 348
 349 void
 350 failsafe_dev_remove(struct rte_eth_dev *dev)
 351 {
 352         struct sub_device *sdev;
 353         uint8_t i;
 354
 355         FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE)
 356                 if (sdev->remove && fs_rxtx_clean(sdev)) {
 357                         fs_dev_stats_save(sdev);
 358                         fs_dev_remove(sdev);
 359                 }
 360 }
 361
 362 int
 363 failsafe_eth_dev_state_sync(struct rte_eth_dev *dev)
 364 {
 365         struct sub_device *sdev;
 366         uint32_t inactive;
 367         int ret;
 368         uint8_t i;
 369
 370         if (PRIV(dev)->state < DEV_PARSED)
 371                 return 0;
 372
 373         ret = failsafe_args_parse_subs(dev);
 374         if (ret)
 375                 goto err_remove;
 376
 377         if (PRIV(dev)->state < DEV_PROBED)
 378                 return 0;
 379         ret = failsafe_eal_init(dev);
 380         if (ret)
 381                 goto err_remove;
 382         if (PRIV(dev)->state < DEV_ACTIVE)
 383                 return 0;
 384         inactive = 0;
 385         FOREACH_SUBDEV(sdev, i, dev) {
 386                 if (sdev->state == DEV_PROBED) {
 387                         inactive |= UINT32_C(1) << i;
 388                         ret = eth_dev_flow_isolate_set(dev, sdev);
 389                         if (ret) {
 390                                 ERROR("Could not apply configuration to sub_device %d",
 391                                       i);
 392                                 goto err_remove;
 393                         }
 394                 }
 395         }
 396         ret = dev->dev_ops->dev_configure(dev);
 397         if (ret)
 398                 goto err_remove;
 399         FOREACH_SUBDEV(sdev, i, dev) {
 400                 if (inactive & (UINT32_C(1) << i)) {
 401                         ret = fs_eth_dev_conf_apply(dev, sdev);
 402                         if (ret) {
 403                                 ERROR("Could not apply configuration to sub_device %d",
 404                                       i);
 405                                 goto err_remove;
 406                         }
 407                 }
 408         }
 409         /*
 410          * If new devices have been configured, check if
 411          * the link state has changed.
 412          */
 413         if (inactive)
 414                 dev->dev_ops->link_update(dev, 1);
 415         if (PRIV(dev)->state < DEV_STARTED)
 416                 return 0;
 417         ret = dev->dev_ops->dev_start(dev);
 418         if (ret)
 419                 goto err_remove;
 420         return 0;
 421 err_remove:
 422         FOREACH_SUBDEV(sdev, i, dev)
 423                 if (sdev->state != PRIV(dev)->state)
 424                         sdev->remove = 1;
 425         return ret;
 426 }
 427
 428 void
 429 failsafe_stats_increment(struct rte_eth_stats *to, struct rte_eth_stats *from)
 430 {
 431         uint32_t i;
 432
 433         RTE_ASSERT(to != NULL && from != NULL);
 434         to->ipackets += from->ipackets;
 435         to->opackets += from->opackets;
 436         to->ibytes += from->ibytes;
 437         to->obytes += from->obytes;
 438         to->imissed += from->imissed;
 439         to->ierrors += from->ierrors;
 440         to->oerrors += from->oerrors;
 441         to->rx_nombuf += from->rx_nombuf;
 442         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS; i++) {
 443                 to->q_ipackets[i] += from->q_ipackets[i];
 444                 to->q_opackets[i] += from->q_opackets[i];
 445                 to->q_ibytes[i] += from->q_ibytes[i];
 446                 to->q_obytes[i] += from->q_obytes[i];
 447                 to->q_errors[i] += from->q_errors[i];
 448         }
 449 }
 450
 451 int
 452 failsafe_eth_rmv_event_callback(uint16_t port_id __rte_unused,
 453                                 enum rte_eth_event_type event __rte_unused,
 454                                 void *cb_arg, void *out __rte_unused)
 455 {
 456         struct sub_device *sdev = cb_arg;
 457
 458         /* Switch as soon as possible tx_dev. */
 459         fs_switch_dev(sdev->fs_dev, sdev);
 460         /* Use safe bursts in any case. */
 461         set_burst_fn(sdev->fs_dev, 1);
 462         /*
 463          * Async removal, the sub-PMD will try to unregister
 464          * the callback at the source of the current thread context.
 465          */
 466         sdev->remove = 1;
 467         return 0;
 468 }
 469
 470 int
 471 failsafe_eth_lsc_event_callback(uint16_t port_id __rte_unused,
 472                                 enum rte_eth_event_type event __rte_unused,
 473                                 void *cb_arg, void *out __rte_unused)
 474 {
 475         struct rte_eth_dev *dev = cb_arg;
 476         int ret;
 477
 478         ret = dev->dev_ops->link_update(dev, 0);
 479         /* We must pass on the LSC event */
 480         if (ret)
 481                 return _rte_eth_dev_callback_process(dev,
 482                                                      RTE_ETH_EVENT_INTR_LSC,
 483                                                      NULL, NULL);
 484         else
 485                 return 0;
 486 }