1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright 2017 6WIND S.A. 3 * Copyright 2017 Mellanox Technologies, Ltd 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 int failsafe_logtype; 17 18 const char pmd_failsafe_driver_name[] = FAILSAFE_DRIVER_NAME; 19 static const struct rte_eth_link eth_link = { 20 .link_speed = ETH_SPEED_NUM_10G, 21 .link_duplex = ETH_LINK_FULL_DUPLEX, 22 .link_status = ETH_LINK_UP, 23 .link_autoneg = ETH_LINK_AUTONEG, 24 }; 25 26 static int 27 fs_sub_device_alloc(struct rte_eth_dev *dev, 28 const char *params) 29 { 30 uint8_t nb_subs; 31 int ret; 32 int i; 33 34 ret = failsafe_args_count_subdevice(dev, params); 35 if (ret) 36 return ret; 37 if (PRIV(dev)->subs_tail > FAILSAFE_MAX_ETHPORTS) { 38 ERROR("Cannot allocate more than %d ports", 39 FAILSAFE_MAX_ETHPORTS); 40 return -ENOSPC; 41 } 42 nb_subs = PRIV(dev)->subs_tail; 43 PRIV(dev)->subs = rte_zmalloc(NULL, 44 sizeof(struct sub_device) * nb_subs, 45 RTE_CACHE_LINE_SIZE); 46 if (PRIV(dev)->subs == NULL) { 47 ERROR("Could not allocate sub_devices"); 48 return -ENOMEM; 49 } 50 /* Initiate static sub devices linked list. */ 51 for (i = 1; i < nb_subs; i++) 52 PRIV(dev)->subs[i - 1].next = PRIV(dev)->subs + i; 53 PRIV(dev)->subs[i - 1].next = PRIV(dev)->subs; 54 return 0; 55 } 56 57 static void 58 fs_sub_device_free(struct rte_eth_dev *dev) 59 { 60 rte_free(PRIV(dev)->subs); 61 } 62 63 static void fs_hotplug_alarm(void *arg); 64 65 int 66 failsafe_hotplug_alarm_install(struct rte_eth_dev *dev) 67 { 68 int ret; 69 70 if (dev == NULL) 71 return -EINVAL; 72 if (PRIV(dev)->pending_alarm) 73 return 0; 74 ret = rte_eal_alarm_set(hotplug_poll * 1000, 75 fs_hotplug_alarm, 76 dev); 77 if (ret) { 78 ERROR("Could not set up plug-in event detection"); 79 return ret; 80 } 81 PRIV(dev)->pending_alarm = 1; 82 return 0; 83 } 84 85 int 86 failsafe_hotplug_alarm_cancel(struct rte_eth_dev *dev) 87 { 88 int ret = 0; 89 90 rte_errno = 0; 91 rte_eal_alarm_cancel(fs_hotplug_alarm, dev); 92 if (rte_errno) { 93 ERROR("rte_eal_alarm_cancel failed (errno: %s)", 94 strerror(rte_errno)); 95 ret = -rte_errno; 96 } else { 97 PRIV(dev)->pending_alarm = 0; 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 if (fs_lock(dev, 1) != 0) 119 goto reinstall; 120 ret = failsafe_eth_dev_state_sync(dev); 121 fs_unlock(dev, 1); 122 if (ret) 123 ERROR("Unable to synchronize sub_device state"); 124 } 125 failsafe_dev_remove(dev); 126 reinstall: 127 ret = failsafe_hotplug_alarm_install(dev); 128 if (ret) 129 ERROR("Unable to set up next alarm"); 130 } 131 132 static int 133 fs_mutex_init(struct fs_priv *priv) 134 { 135 int ret; 136 pthread_mutexattr_t attr; 137 138 ret = pthread_mutexattr_init(&attr); 139 if (ret) { 140 ERROR("Cannot initiate mutex attributes - %s", strerror(ret)); 141 return ret; 142 } 143 /* Allow mutex relocks for the thread holding the mutex. */ 144 ret = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); 145 if (ret) { 146 ERROR("Cannot set mutex type - %s", strerror(ret)); 147 return ret; 148 } 149 ret = pthread_mutex_init(&priv->hotplug_mutex, &attr); 150 if (ret) { 151 ERROR("Cannot initiate mutex - %s", strerror(ret)); 152 return ret; 153 } 154 return 0; 155 } 156 157 static int 158 fs_eth_dev_create(struct rte_vdev_device *vdev) 159 { 160 struct rte_eth_dev *dev; 161 struct ether_addr *mac; 162 struct fs_priv *priv; 163 struct sub_device *sdev; 164 const char *params; 165 unsigned int socket_id; 166 uint8_t i; 167 int ret; 168 169 dev = NULL; 170 priv = NULL; 171 socket_id = rte_socket_id(); 172 INFO("Creating fail-safe device on NUMA socket %u", socket_id); 173 params = rte_vdev_device_args(vdev); 174 if (params == NULL) { 175 ERROR("This PMD requires sub-devices, none provided"); 176 return -1; 177 } 178 dev = rte_eth_vdev_allocate(vdev, sizeof(*priv)); 179 if (dev == NULL) { 180 ERROR("Unable to allocate rte_eth_dev"); 181 return -1; 182 } 183 priv = PRIV(dev); 184 priv->dev = dev; 185 dev->dev_ops = &failsafe_ops; 186 dev->data->mac_addrs = &PRIV(dev)->mac_addrs[0]; 187 dev->data->dev_link = eth_link; 188 PRIV(dev)->nb_mac_addr = 1; 189 TAILQ_INIT(&PRIV(dev)->flow_list); 190 dev->rx_pkt_burst = (eth_rx_burst_t)&failsafe_rx_burst; 191 dev->tx_pkt_burst = (eth_tx_burst_t)&failsafe_tx_burst; 192 ret = fs_sub_device_alloc(dev, params); 193 if (ret) { 194 ERROR("Could not allocate sub_devices"); 195 goto free_dev; 196 } 197 ret = failsafe_args_parse(dev, params); 198 if (ret) 199 goto free_subs; 200 ret = rte_eth_dev_owner_new(&priv->my_owner.id); 201 if (ret) { 202 ERROR("Failed to get unique owner identifier"); 203 goto free_args; 204 } 205 snprintf(priv->my_owner.name, sizeof(priv->my_owner.name), 206 FAILSAFE_OWNER_NAME); 207 DEBUG("Failsafe port %u owner info: %s_%016"PRIX64, dev->data->port_id, 208 priv->my_owner.name, priv->my_owner.id); 209 ret = rte_eth_dev_callback_register(RTE_ETH_ALL, RTE_ETH_EVENT_NEW, 210 failsafe_eth_new_event_callback, 211 dev); 212 if (ret) { 213 ERROR("Failed to register NEW callback"); 214 goto free_args; 215 } 216 ret = failsafe_eal_init(dev); 217 if (ret) 218 goto unregister_new_callback; 219 ret = fs_mutex_init(priv); 220 if (ret) 221 goto unregister_new_callback; 222 ret = failsafe_hotplug_alarm_install(dev); 223 if (ret) { 224 ERROR("Could not set up plug-in event detection"); 225 goto unregister_new_callback; 226 } 227 mac = &dev->data->mac_addrs[0]; 228 if (mac_from_arg) { 229 /* 230 * If MAC address was provided as a parameter, 231 * apply to all probed slaves. 232 */ 233 FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_PROBED) { 234 ret = rte_eth_dev_default_mac_addr_set(PORT_ID(sdev), 235 mac); 236 if (ret) { 237 ERROR("Failed to set default MAC address"); 238 goto cancel_alarm; 239 } 240 } 241 } else { 242 /* 243 * Use the ether_addr from first probed 244 * device, either preferred or fallback. 245 */ 246 FOREACH_SUBDEV(sdev, i, dev) 247 if (sdev->state >= DEV_PROBED) { 248 ether_addr_copy(Ð(sdev)->data->mac_addrs[0], 249 mac); 250 break; 251 } 252 /* 253 * If no device has been probed and no ether_addr 254 * has been provided on the command line, use a random 255 * valid one. 256 * It will be applied during future slave state syncs to 257 * probed slaves. 258 */ 259 if (i == priv->subs_tail) 260 eth_random_addr(&mac->addr_bytes[0]); 261 } 262 INFO("MAC address is %02x:%02x:%02x:%02x:%02x:%02x", 263 mac->addr_bytes[0], mac->addr_bytes[1], 264 mac->addr_bytes[2], mac->addr_bytes[3], 265 mac->addr_bytes[4], mac->addr_bytes[5]); 266 dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC; 267 PRIV(dev)->intr_handle = (struct rte_intr_handle){ 268 .fd = -1, 269 .type = RTE_INTR_HANDLE_EXT, 270 }; 271 rte_eth_dev_probing_finish(dev); 272 return 0; 273 cancel_alarm: 274 failsafe_hotplug_alarm_cancel(dev); 275 unregister_new_callback: 276 rte_eth_dev_callback_unregister(RTE_ETH_ALL, RTE_ETH_EVENT_NEW, 277 failsafe_eth_new_event_callback, dev); 278 free_args: 279 failsafe_args_free(dev); 280 free_subs: 281 fs_sub_device_free(dev); 282 free_dev: 283 rte_free(PRIV(dev)); 284 rte_eth_dev_release_port(dev); 285 return -1; 286 } 287 288 static int 289 fs_rte_eth_free(const char *name) 290 { 291 struct rte_eth_dev *dev; 292 int ret; 293 294 dev = rte_eth_dev_allocated(name); 295 if (dev == NULL) 296 return -ENODEV; 297 rte_eth_dev_callback_unregister(RTE_ETH_ALL, RTE_ETH_EVENT_NEW, 298 failsafe_eth_new_event_callback, dev); 299 ret = failsafe_eal_uninit(dev); 300 if (ret) 301 ERROR("Error while uninitializing sub-EAL"); 302 failsafe_args_free(dev); 303 fs_sub_device_free(dev); 304 ret = pthread_mutex_destroy(&PRIV(dev)->hotplug_mutex); 305 if (ret) 306 ERROR("Error while destroying hotplug mutex"); 307 rte_free(PRIV(dev)->mcast_addrs); 308 rte_free(PRIV(dev)); 309 rte_eth_dev_release_port(dev); 310 return ret; 311 } 312 313 static int 314 rte_pmd_failsafe_probe(struct rte_vdev_device *vdev) 315 { 316 const char *name; 317 struct rte_eth_dev *eth_dev; 318 319 name = rte_vdev_device_name(vdev); 320 INFO("Initializing " FAILSAFE_DRIVER_NAME " for %s", 321 name); 322 323 if (rte_eal_process_type() == RTE_PROC_SECONDARY && 324 strlen(rte_vdev_device_args(vdev)) == 0) { 325 eth_dev = rte_eth_dev_attach_secondary(name); 326 if (!eth_dev) { 327 ERROR("Failed to probe %s", name); 328 return -1; 329 } 330 /* TODO: request info from primary to set up Rx and Tx */ 331 eth_dev->dev_ops = &failsafe_ops; 332 eth_dev->device = &vdev->device; 333 rte_eth_dev_probing_finish(eth_dev); 334 return 0; 335 } 336 337 return fs_eth_dev_create(vdev); 338 } 339 340 static int 341 rte_pmd_failsafe_remove(struct rte_vdev_device *vdev) 342 { 343 const char *name; 344 345 name = rte_vdev_device_name(vdev); 346 INFO("Uninitializing " FAILSAFE_DRIVER_NAME " for %s", name); 347 return fs_rte_eth_free(name); 348 } 349 350 static struct rte_vdev_driver failsafe_drv = { 351 .probe = rte_pmd_failsafe_probe, 352 .remove = rte_pmd_failsafe_remove, 353 }; 354 355 RTE_PMD_REGISTER_VDEV(net_failsafe, failsafe_drv); 356 RTE_PMD_REGISTER_PARAM_STRING(net_failsafe, PMD_FAILSAFE_PARAM_STRING); 357 358 RTE_INIT(failsafe_init_log) 359 { 360 failsafe_logtype = rte_log_register("pmd.net.failsafe"); 361 if (failsafe_logtype >= 0) 362 rte_log_set_level(failsafe_logtype, RTE_LOG_NOTICE); 363 } 364