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 fs_eth_dev_conf_apply(struct rte_eth_dev *dev,
  78                 struct sub_device *sdev)
  79 {
  80         struct rte_eth_dev *edev;
  81         struct rte_vlan_filter_conf *vfc1;
  82         struct rte_vlan_filter_conf *vfc2;
  83         struct rte_flow *flow;
  84         struct rte_flow_error ferror;
  85         uint32_t i;
  86         int ret;
  87
  88         edev = ETH(sdev);
  89         /* RX queue setup */
  90         for (i = 0; i < dev->data->nb_rx_queues; i++) {
  91                 struct rxq *rxq;
  92
  93                 rxq = dev->data->rx_queues[i];
  94                 ret = rte_eth_rx_queue_setup(PORT_ID(sdev), i,
  95                                 rxq->info.nb_desc, rxq->socket_id,
  96                                 &rxq->info.conf, rxq->info.mp);
  97                 if (ret) {
  98                         ERROR("rx_queue_setup failed");
  99                         return ret;
 100                 }
 101         }
 102         /* TX queue setup */
 103         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 104                 struct txq *txq;
 105
 106                 txq = dev->data->tx_queues[i];
 107                 ret = rte_eth_tx_queue_setup(PORT_ID(sdev), i,
 108                                 txq->info.nb_desc, txq->socket_id,
 109                                 &txq->info.conf);
 110                 if (ret) {
 111                         ERROR("tx_queue_setup failed");
 112                         return ret;
 113                 }
 114         }
 115         /* dev_link.link_status */
 116         if (dev->data->dev_link.link_status !=
 117             edev->data->dev_link.link_status) {
 118                 DEBUG("Configuring link_status");
 119                 if (dev->data->dev_link.link_status)
 120                         ret = rte_eth_dev_set_link_up(PORT_ID(sdev));
 121                 else
 122                         ret = rte_eth_dev_set_link_down(PORT_ID(sdev));
 123                 if (ret) {
 124                         ERROR("Failed to apply link_status");
 125                         return ret;
 126                 }
 127         } else {
 128                 DEBUG("link_status already set");
 129         }
 130         /* promiscuous */
 131         if (dev->data->promiscuous != edev->data->promiscuous) {
 132                 DEBUG("Configuring promiscuous");
 133                 if (dev->data->promiscuous)
 134                         rte_eth_promiscuous_enable(PORT_ID(sdev));
 135                 else
 136                         rte_eth_promiscuous_disable(PORT_ID(sdev));
 137         } else {
 138                 DEBUG("promiscuous already set");
 139         }
 140         /* all_multicast */
 141         if (dev->data->all_multicast != edev->data->all_multicast) {
 142                 DEBUG("Configuring all_multicast");
 143                 if (dev->data->all_multicast)
 144                         rte_eth_allmulticast_enable(PORT_ID(sdev));
 145                 else
 146                         rte_eth_allmulticast_disable(PORT_ID(sdev));
 147         } else {
 148                 DEBUG("all_multicast already set");
 149         }
 150         /* MTU */
 151         if (dev->data->mtu != edev->data->mtu) {
 152                 DEBUG("Configuring MTU");
 153                 ret = rte_eth_dev_set_mtu(PORT_ID(sdev), dev->data->mtu);
 154                 if (ret) {
 155                         ERROR("Failed to apply MTU");
 156                         return ret;
 157                 }
 158         } else {
 159                 DEBUG("MTU already set");
 160         }
 161         /* default MAC */
 162         DEBUG("Configuring default MAC address");
 163         ret = rte_eth_dev_default_mac_addr_set(PORT_ID(sdev),
 164                         &dev->data->mac_addrs[0]);
 165         if (ret) {
 166                 ERROR("Setting default MAC address failed");
 167                 return ret;
 168         }
 169         /* additional MAC */
 170         if (PRIV(dev)->nb_mac_addr > 1)
 171                 DEBUG("Configure additional MAC address%s",
 172                         (PRIV(dev)->nb_mac_addr > 2 ? "es" : ""));
 173         for (i = 1; i < PRIV(dev)->nb_mac_addr; i++) {
 174                 struct ether_addr *ea;
 175
 176                 ea = &dev->data->mac_addrs[i];
 177                 ret = rte_eth_dev_mac_addr_add(PORT_ID(sdev), ea,
 178                                 PRIV(dev)->mac_addr_pool[i]);
 179                 if (ret) {
 180                         char ea_fmt[ETHER_ADDR_FMT_SIZE];
 181
 182                         ether_format_addr(ea_fmt, ETHER_ADDR_FMT_SIZE, ea);
 183                         ERROR("Adding MAC address %s failed", ea_fmt);
 184                 }
 185         }
 186         /* VLAN filter */
 187         vfc1 = &dev->data->vlan_filter_conf;
 188         vfc2 = &edev->data->vlan_filter_conf;
 189         if (memcmp(vfc1, vfc2, sizeof(struct rte_vlan_filter_conf))) {
 190                 uint64_t vbit;
 191                 uint64_t ids;
 192                 size_t i;
 193                 uint16_t vlan_id;
 194
 195                 DEBUG("Configuring VLAN filter");
 196                 for (i = 0; i < RTE_DIM(vfc1->ids); i++) {
 197                         if (vfc1->ids[i] == 0)
 198                                 continue;
 199                         ids = vfc1->ids[i];
 200                         while (ids) {
 201                                 vlan_id = 64 * i;
 202                                 /* count trailing zeroes */
 203                                 vbit = ~ids & (ids - 1);
 204                                 /* clear least significant bit set */
 205                                 ids ^= (ids ^ (ids - 1)) ^ vbit;
 206                                 for (; vbit; vlan_id++)
 207                                         vbit >>= 1;
 208                                 ret = rte_eth_dev_vlan_filter(
 209                                         PORT_ID(sdev), vlan_id, 1);
 210                                 if (ret) {
 211                                         ERROR("Failed to apply VLAN filter %hu",
 212                                                 vlan_id);
 213                                         return ret;
 214                                 }
 215                         }
 216                 }
 217         } else {
 218                 DEBUG("VLAN filter already set");
 219         }
 220         /* rte_flow */
 221         if (TAILQ_EMPTY(&PRIV(dev)->flow_list)) {
 222                 DEBUG("rte_flow already set");
 223         } else {
 224                 DEBUG("Resetting rte_flow configuration");
 225                 ret = rte_flow_flush(PORT_ID(sdev), &ferror);
 226                 if (ret) {
 227                         fs_flow_complain(&ferror);
 228                         return ret;
 229                 }
 230                 i = 0;
 231                 rte_errno = 0;
 232                 DEBUG("Configuring rte_flow");
 233                 TAILQ_FOREACH(flow, &PRIV(dev)->flow_list, next) {
 234                         DEBUG("Creating flow #%" PRIu32, i++);
 235                         flow->flows[SUB_ID(sdev)] =
 236                                 rte_flow_create(PORT_ID(sdev),
 237                                                 &flow->fd->attr,
 238                                                 flow->fd->items,
 239                                                 flow->fd->actions,
 240                                                 &ferror);
 241                         ret = rte_errno;
 242                         if (ret)
 243                                 break;
 244                 }
 245                 if (ret) {
 246                         fs_flow_complain(&ferror);
 247                         return ret;
 248                 }
 249         }
 250         return 0;
 251 }
 252
 253 static void
 254 fs_dev_remove(struct sub_device *sdev)
 255 {
 256         int ret;
 257
 258         if (sdev == NULL)
 259                 return;
 260         switch (sdev->state) {
 261         case DEV_STARTED:
 262                 rte_eth_dev_stop(PORT_ID(sdev));
 263                 sdev->state = DEV_ACTIVE;
 264                 /* fallthrough */
 265         case DEV_ACTIVE:
 266                 rte_eth_dev_close(PORT_ID(sdev));
 267                 sdev->state = DEV_PROBED;
 268                 /* fallthrough */
 269         case DEV_PROBED:
 270                 ret = rte_eal_hotplug_remove(sdev->bus->name,
 271                                              sdev->dev->name);
 272                 if (ret) {
 273                         ERROR("Bus detach failed for sub_device %u",
 274                               SUB_ID(sdev));
 275                 } else {
 276                         ETH(sdev)->state = RTE_ETH_DEV_UNUSED;
 277                 }
 278                 sdev->state = DEV_PARSED;
 279                 /* fallthrough */
 280         case DEV_PARSED:
 281         case DEV_UNDEFINED:
 282                 sdev->state = DEV_UNDEFINED;
 283                 /* the end */
 284                 break;
 285         }
 286         failsafe_hotplug_alarm_install(sdev->fs_dev);
 287 }
 288
 289 static inline int
 290 fs_rxtx_clean(struct sub_device *sdev)
 291 {
 292         uint16_t i;
 293
 294         for (i = 0; i < ETH(sdev)->data->nb_rx_queues; i++)
 295                 if (FS_ATOMIC_RX(sdev, i))
 296                         return 0;
 297         for (i = 0; i < ETH(sdev)->data->nb_tx_queues; i++)
 298                 if (FS_ATOMIC_TX(sdev, i))
 299                         return 0;
 300         return 1;
 301 }
 302
 303 void
 304 failsafe_dev_remove(struct rte_eth_dev *dev)
 305 {
 306         struct sub_device *sdev;
 307         uint8_t i;
 308
 309         FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE)
 310                 if (sdev->remove && fs_rxtx_clean(sdev))
 311                         fs_dev_remove(sdev);
 312 }
 313
 314 int
 315 failsafe_eth_dev_state_sync(struct rte_eth_dev *dev)
 316 {
 317         struct sub_device *sdev;
 318         uint32_t inactive;
 319         int ret;
 320         uint8_t i;
 321
 322         if (PRIV(dev)->state < DEV_PARSED)
 323                 return 0;
 324
 325         ret = failsafe_args_parse_subs(dev);
 326         if (ret)
 327                 goto err_remove;
 328
 329         if (PRIV(dev)->state < DEV_PROBED)
 330                 return 0;
 331         ret = failsafe_eal_init(dev);
 332         if (ret)
 333                 goto err_remove;
 334         if (PRIV(dev)->state < DEV_ACTIVE)
 335                 return 0;
 336         inactive = 0;
 337         FOREACH_SUBDEV(sdev, i, dev)
 338                 if (sdev->state == DEV_PROBED)
 339                         inactive |= UINT32_C(1) << i;
 340         ret = dev->dev_ops->dev_configure(dev);
 341         if (ret)
 342                 goto err_remove;
 343         FOREACH_SUBDEV(sdev, i, dev) {
 344                 if (inactive & (UINT32_C(1) << i)) {
 345                         ret = fs_eth_dev_conf_apply(dev, sdev);
 346                         if (ret) {
 347                                 ERROR("Could not apply configuration to sub_device %d",
 348                                       i);
 349                                 goto err_remove;
 350                         }
 351                 }
 352         }
 353         /*
 354          * If new devices have been configured, check if
 355          * the link state has changed.
 356          */
 357         if (inactive)
 358                 dev->dev_ops->link_update(dev, 1);
 359         if (PRIV(dev)->state < DEV_STARTED)
 360                 return 0;
 361         ret = dev->dev_ops->dev_start(dev);
 362         if (ret)
 363                 goto err_remove;
 364         return 0;
 365 err_remove:
 366         FOREACH_SUBDEV(sdev, i, dev)
 367                 if (sdev->state != PRIV(dev)->state)
 368                         sdev->remove = 1;
 369         return ret;
 370 }
 371
 372 int
 373 failsafe_eth_rmv_event_callback(uint8_t port_id __rte_unused,
 374                                 enum rte_eth_event_type event __rte_unused,
 375                                 void *cb_arg, void *out __rte_unused)
 376 {
 377         struct sub_device *sdev = cb_arg;
 378
 379         /* Switch as soon as possible tx_dev. */
 380         fs_switch_dev(sdev->fs_dev, sdev);
 381         /* Use safe bursts in any case. */
 382         set_burst_fn(sdev->fs_dev, 1);
 383         /*
 384          * Async removal, the sub-PMD will try to unregister
 385          * the callback at the source of the current thread context.
 386          */
 387         sdev->remove = 1;
 388         return 0;
 389 }
 390
 391 int
 392 failsafe_eth_lsc_event_callback(uint8_t port_id __rte_unused,
 393                                 enum rte_eth_event_type event __rte_unused,
 394                                 void *cb_arg, void *out __rte_unused)
 395 {
 396         struct rte_eth_dev *dev = cb_arg;
 397         int ret;
 398
 399         ret = dev->dev_ops->link_update(dev, 0);
 400         /* We must pass on the LSC event */
 401         if (ret)
 402                 return _rte_eth_dev_callback_process(dev,
 403                                                      RTE_ETH_EVENT_INTR_LSC,
 404                                                      NULL, NULL);
 405         else
 406                 return 0;
 407 }