drivers/net/failsafe/failsafe.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2017 6WIND S.A.
   3  * Copyright 2017 Mellanox.
   4  */
   5
   6 #include <rte_alarm.h>
   7 #include <rte_malloc.h>
   8 #include <rte_ethdev_driver.h>
   9 #include <rte_ethdev_vdev.h>
  10 #include <rte_devargs.h>
  11 #include <rte_kvargs.h>
  12 #include <rte_bus_vdev.h>
  13
  14 #include "failsafe_private.h"
  15
  16 const char pmd_failsafe_driver_name[] = FAILSAFE_DRIVER_NAME;
  17 static const struct rte_eth_link eth_link = {
  18         .link_speed = ETH_SPEED_NUM_10G,
  19         .link_duplex = ETH_LINK_FULL_DUPLEX,
  20         .link_status = ETH_LINK_UP,
  21         .link_autoneg = ETH_LINK_AUTONEG,
  22 };
  23
  24 static int
  25 fs_sub_device_alloc(struct rte_eth_dev *dev,
  26                 const char *params)
  27 {
  28         uint8_t nb_subs;
  29         int ret;
  30         int i;
  31
  32         ret = failsafe_args_count_subdevice(dev, params);
  33         if (ret)
  34                 return ret;
  35         if (PRIV(dev)->subs_tail > FAILSAFE_MAX_ETHPORTS) {
  36                 ERROR("Cannot allocate more than %d ports",
  37                         FAILSAFE_MAX_ETHPORTS);
  38                 return -ENOSPC;
  39         }
  40         nb_subs = PRIV(dev)->subs_tail;
  41         PRIV(dev)->subs = rte_zmalloc(NULL,
  42                         sizeof(struct sub_device) * nb_subs,
  43                         RTE_CACHE_LINE_SIZE);
  44         if (PRIV(dev)->subs == NULL) {
  45                 ERROR("Could not allocate sub_devices");
  46                 return -ENOMEM;
  47         }
  48         /* Initiate static sub devices linked list. */
  49         for (i = 1; i < nb_subs; i++)
  50                 PRIV(dev)->subs[i - 1].next = PRIV(dev)->subs + i;
  51         PRIV(dev)->subs[i - 1].next = PRIV(dev)->subs;
  52         return 0;
  53 }
  54
  55 static void
  56 fs_sub_device_free(struct rte_eth_dev *dev)
  57 {
  58         rte_free(PRIV(dev)->subs);
  59 }
  60
  61 static void fs_hotplug_alarm(void *arg);
  62
  63 int
  64 failsafe_hotplug_alarm_install(struct rte_eth_dev *dev)
  65 {
  66         int ret;
  67
  68         if (dev == NULL)
  69                 return -EINVAL;
  70         if (PRIV(dev)->pending_alarm)
  71                 return 0;
  72         ret = rte_eal_alarm_set(hotplug_poll * 1000,
  73                                 fs_hotplug_alarm,
  74                                 dev);
  75         if (ret) {
  76                 ERROR("Could not set up plug-in event detection");
  77                 return ret;
  78         }
  79         PRIV(dev)->pending_alarm = 1;
  80         return 0;
  81 }
  82
  83 int
  84 failsafe_hotplug_alarm_cancel(struct rte_eth_dev *dev)
  85 {
  86         int ret = 0;
  87
  88         if (PRIV(dev)->pending_alarm) {
  89                 rte_errno = 0;
  90                 rte_eal_alarm_cancel(fs_hotplug_alarm, dev);
  91                 if (rte_errno) {
  92                         ERROR("rte_eal_alarm_cancel failed (errno: %s)",
  93                               strerror(rte_errno));
  94                         ret = -rte_errno;
  95                 } else {
  96                         PRIV(dev)->pending_alarm = 0;
  97                 }
  98         }
  99         return ret;
 100 }
 101
 102 static void
 103 fs_hotplug_alarm(void *arg)
 104 {
 105         struct rte_eth_dev *dev = arg;
 106         struct sub_device *sdev;
 107         int ret;
 108         uint8_t i;
 109
 110         if (!PRIV(dev)->pending_alarm)
 111                 return;
 112         PRIV(dev)->pending_alarm = 0;
 113         FOREACH_SUBDEV(sdev, i, dev)
 114                 if (sdev->state != PRIV(dev)->state)
 115                         break;
 116         /* if we have non-probed device */
 117         if (i != PRIV(dev)->subs_tail) {
 118                 ret = failsafe_eth_dev_state_sync(dev);
 119                 if (ret)
 120                         ERROR("Unable to synchronize sub_device state");
 121         }
 122         failsafe_dev_remove(dev);
 123         ret = failsafe_hotplug_alarm_install(dev);
 124         if (ret)
 125                 ERROR("Unable to set up next alarm");
 126 }
 127
 128 static int
 129 fs_eth_dev_create(struct rte_vdev_device *vdev)
 130 {
 131         struct rte_eth_dev *dev;
 132         struct ether_addr *mac;
 133         struct fs_priv *priv;
 134         struct sub_device *sdev;
 135         const char *params;
 136         unsigned int socket_id;
 137         uint8_t i;
 138         int ret;
 139
 140         dev = NULL;
 141         priv = NULL;
 142         socket_id = rte_socket_id();
 143         INFO("Creating fail-safe device on NUMA socket %u", socket_id);
 144         params = rte_vdev_device_args(vdev);
 145         if (params == NULL) {
 146                 ERROR("This PMD requires sub-devices, none provided");
 147                 return -1;
 148         }
 149         dev = rte_eth_vdev_allocate(vdev, sizeof(*priv));
 150         if (dev == NULL) {
 151                 ERROR("Unable to allocate rte_eth_dev");
 152                 return -1;
 153         }
 154         priv = PRIV(dev);
 155         priv->dev = dev;
 156         dev->dev_ops = &failsafe_ops;
 157         dev->data->mac_addrs = &PRIV(dev)->mac_addrs[0];
 158         dev->data->dev_link = eth_link;
 159         PRIV(dev)->nb_mac_addr = 1;
 160         TAILQ_INIT(&PRIV(dev)->flow_list);
 161         dev->rx_pkt_burst = (eth_rx_burst_t)&failsafe_rx_burst;
 162         dev->tx_pkt_burst = (eth_tx_burst_t)&failsafe_tx_burst;
 163         ret = fs_sub_device_alloc(dev, params);
 164         if (ret) {
 165                 ERROR("Could not allocate sub_devices");
 166                 goto free_dev;
 167         }
 168         ret = failsafe_args_parse(dev, params);
 169         if (ret)
 170                 goto free_subs;
 171         ret = rte_eth_dev_owner_new(&priv->my_owner.id);
 172         if (ret) {
 173                 ERROR("Failed to get unique owner identifier");
 174                 goto free_args;
 175         }
 176         snprintf(priv->my_owner.name, sizeof(priv->my_owner.name),
 177                  FAILSAFE_OWNER_NAME);
 178         ret = failsafe_eal_init(dev);
 179         if (ret)
 180                 goto free_args;
 181         ret = failsafe_hotplug_alarm_install(dev);
 182         if (ret) {
 183                 ERROR("Could not set up plug-in event detection");
 184                 goto free_args;
 185         }
 186         mac = &dev->data->mac_addrs[0];
 187         if (mac_from_arg) {
 188                 /*
 189                  * If MAC address was provided as a parameter,
 190                  * apply to all probed slaves.
 191                  */
 192                 FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_PROBED) {
 193                         ret = rte_eth_dev_default_mac_addr_set(PORT_ID(sdev),
 194                                                                mac);
 195                         if (ret) {
 196                                 ERROR("Failed to set default MAC address");
 197                                 goto free_args;
 198                         }
 199                 }
 200         } else {
 201                 /*
 202                  * Use the ether_addr from first probed
 203                  * device, either preferred or fallback.
 204                  */
 205                 FOREACH_SUBDEV(sdev, i, dev)
 206                         if (sdev->state >= DEV_PROBED) {
 207                                 ether_addr_copy(&ETH(sdev)->data->mac_addrs[0],
 208                                                 mac);
 209                                 break;
 210                         }
 211                 /*
 212                  * If no device has been probed and no ether_addr
 213                  * has been provided on the command line, use a random
 214                  * valid one.
 215                  * It will be applied during future slave state syncs to
 216                  * probed slaves.
 217                  */
 218                 if (i == priv->subs_tail)
 219                         eth_random_addr(&mac->addr_bytes[0]);
 220         }
 221         INFO("MAC address is %02x:%02x:%02x:%02x:%02x:%02x",
 222                 mac->addr_bytes[0], mac->addr_bytes[1],
 223                 mac->addr_bytes[2], mac->addr_bytes[3],
 224                 mac->addr_bytes[4], mac->addr_bytes[5]);
 225         dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
 226         PRIV(dev)->intr_handle = (struct rte_intr_handle){
 227                 .fd = -1,
 228                 .type = RTE_INTR_HANDLE_EXT,
 229         };
 230         return 0;
 231 free_args:
 232         failsafe_args_free(dev);
 233 free_subs:
 234         fs_sub_device_free(dev);
 235 free_dev:
 236         rte_free(PRIV(dev));
 237         rte_eth_dev_release_port(dev);
 238         return -1;
 239 }
 240
 241 static int
 242 fs_rte_eth_free(const char *name)
 243 {
 244         struct rte_eth_dev *dev;
 245         int ret;
 246
 247         dev = rte_eth_dev_allocated(name);
 248         if (dev == NULL)
 249                 return -ENODEV;
 250         ret = failsafe_eal_uninit(dev);
 251         if (ret)
 252                 ERROR("Error while uninitializing sub-EAL");
 253         failsafe_args_free(dev);
 254         fs_sub_device_free(dev);
 255         rte_free(PRIV(dev));
 256         rte_eth_dev_release_port(dev);
 257         return ret;
 258 }
 259
 260 static int
 261 rte_pmd_failsafe_probe(struct rte_vdev_device *vdev)
 262 {
 263         const char *name;
 264
 265         name = rte_vdev_device_name(vdev);
 266         INFO("Initializing " FAILSAFE_DRIVER_NAME " for %s",
 267                         name);
 268         return fs_eth_dev_create(vdev);
 269 }
 270
 271 static int
 272 rte_pmd_failsafe_remove(struct rte_vdev_device *vdev)
 273 {
 274         const char *name;
 275
 276         name = rte_vdev_device_name(vdev);
 277         INFO("Uninitializing " FAILSAFE_DRIVER_NAME " for %s", name);
 278         return fs_rte_eth_free(name);
 279 }
 280
 281 static struct rte_vdev_driver failsafe_drv = {
 282         .probe = rte_pmd_failsafe_probe,
 283         .remove = rte_pmd_failsafe_remove,
 284 };
 285
 286 RTE_PMD_REGISTER_VDEV(net_failsafe, failsafe_drv);
 287 RTE_PMD_REGISTER_PARAM_STRING(net_failsafe, PMD_FAILSAFE_PARAM_STRING);