1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2016-2018 Microsoft Corporation 3 * Copyright(c) 2013-2016 Brocade Communications Systems, Inc. 4 * All rights reserved. 5 */ 6 7 #include <stdint.h> 8 #include <string.h> 9 #include <stdio.h> 10 #include <errno.h> 11 #include <unistd.h> 12 #include <dirent.h> 13 #include <net/if.h> 14 #include <net/if_arp.h> 15 #include <netinet/in.h> 16 #include <sys/ioctl.h> 17 18 #include <rte_ethdev.h> 19 #include <rte_memcpy.h> 20 #include <rte_string_fns.h> 21 #include <rte_memzone.h> 22 #include <rte_devargs.h> 23 #include <rte_malloc.h> 24 #include <rte_kvargs.h> 25 #include <rte_atomic.h> 26 #include <rte_branch_prediction.h> 27 #include <rte_ether.h> 28 #include <ethdev_driver.h> 29 #include <rte_cycles.h> 30 #include <rte_errno.h> 31 #include <rte_memory.h> 32 #include <rte_eal.h> 33 #include <rte_dev.h> 34 #include <rte_bus_vmbus.h> 35 #include <rte_alarm.h> 36 37 #include "hn_logs.h" 38 #include "hn_var.h" 39 #include "hn_rndis.h" 40 #include "hn_nvs.h" 41 #include "ndis.h" 42 43 #define HN_TX_OFFLOAD_CAPS (RTE_ETH_TX_OFFLOAD_IPV4_CKSUM | \ 44 RTE_ETH_TX_OFFLOAD_TCP_CKSUM | \ 45 RTE_ETH_TX_OFFLOAD_UDP_CKSUM | \ 46 RTE_ETH_TX_OFFLOAD_TCP_TSO | \ 47 RTE_ETH_TX_OFFLOAD_MULTI_SEGS | \ 48 RTE_ETH_TX_OFFLOAD_VLAN_INSERT) 49 50 #define HN_RX_OFFLOAD_CAPS (RTE_ETH_RX_OFFLOAD_CHECKSUM | \ 51 RTE_ETH_RX_OFFLOAD_VLAN_STRIP | \ 52 RTE_ETH_RX_OFFLOAD_RSS_HASH) 53 54 #define NETVSC_ARG_LATENCY "latency" 55 #define NETVSC_ARG_RXBREAK "rx_copybreak" 56 #define NETVSC_ARG_TXBREAK "tx_copybreak" 57 #define NETVSC_ARG_RX_EXTMBUF_ENABLE "rx_extmbuf_enable" 58 59 /* The max number of retry when hot adding a VF device */ 60 #define NETVSC_MAX_HOTADD_RETRY 10 61 62 struct hn_xstats_name_off { 63 char name[RTE_ETH_XSTATS_NAME_SIZE]; 64 unsigned int offset; 65 }; 66 67 static const struct hn_xstats_name_off hn_stat_strings[] = { 68 { "good_packets", offsetof(struct hn_stats, packets) }, 69 { "good_bytes", offsetof(struct hn_stats, bytes) }, 70 { "errors", offsetof(struct hn_stats, errors) }, 71 { "ring full", offsetof(struct hn_stats, ring_full) }, 72 { "channel full", offsetof(struct hn_stats, channel_full) }, 73 { "multicast_packets", offsetof(struct hn_stats, multicast) }, 74 { "broadcast_packets", offsetof(struct hn_stats, broadcast) }, 75 { "undersize_packets", offsetof(struct hn_stats, size_bins[0]) }, 76 { "size_64_packets", offsetof(struct hn_stats, size_bins[1]) }, 77 { "size_65_127_packets", offsetof(struct hn_stats, size_bins[2]) }, 78 { "size_128_255_packets", offsetof(struct hn_stats, size_bins[3]) }, 79 { "size_256_511_packets", offsetof(struct hn_stats, size_bins[4]) }, 80 { "size_512_1023_packets", offsetof(struct hn_stats, size_bins[5]) }, 81 { "size_1024_1518_packets", offsetof(struct hn_stats, size_bins[6]) }, 82 { "size_1519_max_packets", offsetof(struct hn_stats, size_bins[7]) }, 83 }; 84 85 /* The default RSS key. 86 * This value is the same as MLX5 so that flows will be 87 * received on same path for both VF and synthetic NIC. 88 */ 89 static const uint8_t rss_default_key[NDIS_HASH_KEYSIZE_TOEPLITZ] = { 90 0x2c, 0xc6, 0x81, 0xd1, 0x5b, 0xdb, 0xf4, 0xf7, 91 0xfc, 0xa2, 0x83, 0x19, 0xdb, 0x1a, 0x3e, 0x94, 92 0x6b, 0x9e, 0x38, 0xd9, 0x2c, 0x9c, 0x03, 0xd1, 93 0xad, 0x99, 0x44, 0xa7, 0xd9, 0x56, 0x3d, 0x59, 94 0x06, 0x3c, 0x25, 0xf3, 0xfc, 0x1f, 0xdc, 0x2a, 95 }; 96 97 static struct rte_eth_dev * 98 eth_dev_vmbus_allocate(struct rte_vmbus_device *dev, size_t private_data_size) 99 { 100 struct rte_eth_dev *eth_dev; 101 const char *name; 102 103 if (!dev) 104 return NULL; 105 106 name = dev->device.name; 107 108 if (rte_eal_process_type() == RTE_PROC_PRIMARY) { 109 eth_dev = rte_eth_dev_allocate(name); 110 if (!eth_dev) { 111 PMD_DRV_LOG(NOTICE, "can not allocate rte ethdev"); 112 return NULL; 113 } 114 115 if (private_data_size) { 116 eth_dev->data->dev_private = 117 rte_zmalloc_socket(name, private_data_size, 118 RTE_CACHE_LINE_SIZE, dev->device.numa_node); 119 if (!eth_dev->data->dev_private) { 120 PMD_DRV_LOG(NOTICE, "can not allocate driver data"); 121 rte_eth_dev_release_port(eth_dev); 122 return NULL; 123 } 124 } 125 } else { 126 eth_dev = rte_eth_dev_attach_secondary(name); 127 if (!eth_dev) { 128 PMD_DRV_LOG(NOTICE, "can not attach secondary"); 129 return NULL; 130 } 131 } 132 133 eth_dev->device = &dev->device; 134 135 /* interrupt is simulated */ 136 dev->intr_handle.type = RTE_INTR_HANDLE_EXT; 137 eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC; 138 eth_dev->intr_handle = &dev->intr_handle; 139 140 return eth_dev; 141 } 142 143 static void 144 eth_dev_vmbus_release(struct rte_eth_dev *eth_dev) 145 { 146 /* free ether device */ 147 rte_eth_dev_release_port(eth_dev); 148 149 eth_dev->device = NULL; 150 eth_dev->intr_handle = NULL; 151 } 152 153 static int hn_set_parameter(const char *key, const char *value, void *opaque) 154 { 155 struct hn_data *hv = opaque; 156 char *endp = NULL; 157 unsigned long v; 158 159 v = strtoul(value, &endp, 0); 160 if (*value == '\0' || *endp != '\0') { 161 PMD_DRV_LOG(ERR, "invalid parameter %s=%s", key, value); 162 return -EINVAL; 163 } 164 165 if (!strcmp(key, NETVSC_ARG_LATENCY)) { 166 /* usec to nsec */ 167 hv->latency = v * 1000; 168 PMD_DRV_LOG(DEBUG, "set latency %u usec", hv->latency); 169 } else if (!strcmp(key, NETVSC_ARG_RXBREAK)) { 170 hv->rx_copybreak = v; 171 PMD_DRV_LOG(DEBUG, "rx copy break set to %u", 172 hv->rx_copybreak); 173 } else if (!strcmp(key, NETVSC_ARG_TXBREAK)) { 174 hv->tx_copybreak = v; 175 PMD_DRV_LOG(DEBUG, "tx copy break set to %u", 176 hv->tx_copybreak); 177 } else if (!strcmp(key, NETVSC_ARG_RX_EXTMBUF_ENABLE)) { 178 hv->rx_extmbuf_enable = v; 179 PMD_DRV_LOG(DEBUG, "rx extmbuf enable set to %u", 180 hv->rx_extmbuf_enable); 181 } 182 183 return 0; 184 } 185 186 /* Parse device arguments */ 187 static int hn_parse_args(const struct rte_eth_dev *dev) 188 { 189 struct hn_data *hv = dev->data->dev_private; 190 struct rte_devargs *devargs = dev->device->devargs; 191 static const char * const valid_keys[] = { 192 NETVSC_ARG_LATENCY, 193 NETVSC_ARG_RXBREAK, 194 NETVSC_ARG_TXBREAK, 195 NETVSC_ARG_RX_EXTMBUF_ENABLE, 196 NULL 197 }; 198 struct rte_kvargs *kvlist; 199 int ret; 200 201 if (!devargs) 202 return 0; 203 204 PMD_INIT_LOG(DEBUG, "device args %s %s", 205 devargs->name, devargs->args); 206 207 kvlist = rte_kvargs_parse(devargs->args, valid_keys); 208 if (!kvlist) { 209 PMD_DRV_LOG(ERR, "invalid parameters"); 210 return -EINVAL; 211 } 212 213 ret = rte_kvargs_process(kvlist, NULL, hn_set_parameter, hv); 214 rte_kvargs_free(kvlist); 215 216 return ret; 217 } 218 219 /* Update link status. 220 * Note: the DPDK definition of "wait_to_complete" 221 * means block this call until link is up. 222 * which is not worth supporting. 223 */ 224 int 225 hn_dev_link_update(struct rte_eth_dev *dev, 226 int wait_to_complete __rte_unused) 227 { 228 struct hn_data *hv = dev->data->dev_private; 229 struct rte_eth_link link, old; 230 int error; 231 232 old = dev->data->dev_link; 233 234 error = hn_rndis_get_linkstatus(hv); 235 if (error) 236 return error; 237 238 hn_rndis_get_linkspeed(hv); 239 240 link = (struct rte_eth_link) { 241 .link_duplex = RTE_ETH_LINK_FULL_DUPLEX, 242 .link_autoneg = RTE_ETH_LINK_SPEED_FIXED, 243 .link_speed = hv->link_speed / 10000, 244 }; 245 246 if (hv->link_status == NDIS_MEDIA_STATE_CONNECTED) 247 link.link_status = RTE_ETH_LINK_UP; 248 else 249 link.link_status = RTE_ETH_LINK_DOWN; 250 251 if (old.link_status == link.link_status) 252 return 0; 253 254 PMD_INIT_LOG(DEBUG, "Port %d is %s", dev->data->port_id, 255 (link.link_status == RTE_ETH_LINK_UP) ? "up" : "down"); 256 257 return rte_eth_linkstatus_set(dev, &link); 258 } 259 260 static int hn_dev_info_get(struct rte_eth_dev *dev, 261 struct rte_eth_dev_info *dev_info) 262 { 263 struct hn_data *hv = dev->data->dev_private; 264 int rc; 265 266 dev_info->speed_capa = RTE_ETH_LINK_SPEED_10G; 267 dev_info->min_rx_bufsize = HN_MIN_RX_BUF_SIZE; 268 dev_info->max_rx_pktlen = HN_MAX_XFER_LEN; 269 dev_info->max_mac_addrs = 1; 270 271 dev_info->hash_key_size = NDIS_HASH_KEYSIZE_TOEPLITZ; 272 dev_info->flow_type_rss_offloads = hv->rss_offloads; 273 dev_info->reta_size = RTE_ETH_RSS_RETA_SIZE_128; 274 275 dev_info->max_rx_queues = hv->max_queues; 276 dev_info->max_tx_queues = hv->max_queues; 277 278 dev_info->tx_desc_lim.nb_min = 1; 279 dev_info->tx_desc_lim.nb_max = 4096; 280 281 if (rte_eal_process_type() != RTE_PROC_PRIMARY) 282 return 0; 283 284 /* fills in rx and tx offload capability */ 285 rc = hn_rndis_get_offload(hv, dev_info); 286 if (rc != 0) 287 return rc; 288 289 /* merges the offload and queues of vf */ 290 return hn_vf_info_get(hv, dev_info); 291 } 292 293 static int hn_rss_reta_update(struct rte_eth_dev *dev, 294 struct rte_eth_rss_reta_entry64 *reta_conf, 295 uint16_t reta_size) 296 { 297 struct hn_data *hv = dev->data->dev_private; 298 unsigned int i; 299 int err; 300 301 PMD_INIT_FUNC_TRACE(); 302 303 if (reta_size != NDIS_HASH_INDCNT) { 304 PMD_DRV_LOG(ERR, "Hash lookup table size does not match NDIS"); 305 return -EINVAL; 306 } 307 308 for (i = 0; i < NDIS_HASH_INDCNT; i++) { 309 uint16_t idx = i / RTE_ETH_RETA_GROUP_SIZE; 310 uint16_t shift = i % RTE_ETH_RETA_GROUP_SIZE; 311 uint64_t mask = (uint64_t)1 << shift; 312 313 if (reta_conf[idx].mask & mask) 314 hv->rss_ind[i] = reta_conf[idx].reta[shift]; 315 } 316 317 err = hn_rndis_conf_rss(hv, NDIS_RSS_FLAG_DISABLE); 318 if (err) { 319 PMD_DRV_LOG(NOTICE, 320 "rss disable failed"); 321 return err; 322 } 323 324 err = hn_rndis_conf_rss(hv, 0); 325 if (err) { 326 PMD_DRV_LOG(NOTICE, 327 "reta reconfig failed"); 328 return err; 329 } 330 331 return hn_vf_reta_hash_update(dev, reta_conf, reta_size); 332 } 333 334 static int hn_rss_reta_query(struct rte_eth_dev *dev, 335 struct rte_eth_rss_reta_entry64 *reta_conf, 336 uint16_t reta_size) 337 { 338 struct hn_data *hv = dev->data->dev_private; 339 unsigned int i; 340 341 PMD_INIT_FUNC_TRACE(); 342 343 if (reta_size != NDIS_HASH_INDCNT) { 344 PMD_DRV_LOG(ERR, "Hash lookup table size does not match NDIS"); 345 return -EINVAL; 346 } 347 348 for (i = 0; i < NDIS_HASH_INDCNT; i++) { 349 uint16_t idx = i / RTE_ETH_RETA_GROUP_SIZE; 350 uint16_t shift = i % RTE_ETH_RETA_GROUP_SIZE; 351 uint64_t mask = (uint64_t)1 << shift; 352 353 if (reta_conf[idx].mask & mask) 354 reta_conf[idx].reta[shift] = hv->rss_ind[i]; 355 } 356 return 0; 357 } 358 359 static void hn_rss_hash_init(struct hn_data *hv, 360 const struct rte_eth_rss_conf *rss_conf) 361 { 362 /* Convert from DPDK RSS hash flags to NDIS hash flags */ 363 hv->rss_hash = NDIS_HASH_FUNCTION_TOEPLITZ; 364 365 if (rss_conf->rss_hf & RTE_ETH_RSS_IPV4) 366 hv->rss_hash |= NDIS_HASH_IPV4; 367 if (rss_conf->rss_hf & RTE_ETH_RSS_NONFRAG_IPV4_TCP) 368 hv->rss_hash |= NDIS_HASH_TCP_IPV4; 369 if (rss_conf->rss_hf & RTE_ETH_RSS_IPV6) 370 hv->rss_hash |= NDIS_HASH_IPV6; 371 if (rss_conf->rss_hf & RTE_ETH_RSS_IPV6_EX) 372 hv->rss_hash |= NDIS_HASH_IPV6_EX; 373 if (rss_conf->rss_hf & RTE_ETH_RSS_NONFRAG_IPV6_TCP) 374 hv->rss_hash |= NDIS_HASH_TCP_IPV6; 375 if (rss_conf->rss_hf & RTE_ETH_RSS_IPV6_TCP_EX) 376 hv->rss_hash |= NDIS_HASH_TCP_IPV6_EX; 377 378 memcpy(hv->rss_key, rss_conf->rss_key ? : rss_default_key, 379 NDIS_HASH_KEYSIZE_TOEPLITZ); 380 } 381 382 static int hn_rss_hash_update(struct rte_eth_dev *dev, 383 struct rte_eth_rss_conf *rss_conf) 384 { 385 struct hn_data *hv = dev->data->dev_private; 386 int err; 387 388 PMD_INIT_FUNC_TRACE(); 389 390 err = hn_rndis_conf_rss(hv, NDIS_RSS_FLAG_DISABLE); 391 if (err) { 392 PMD_DRV_LOG(NOTICE, 393 "rss disable failed"); 394 return err; 395 } 396 397 hn_rss_hash_init(hv, rss_conf); 398 399 if (rss_conf->rss_hf != 0) { 400 err = hn_rndis_conf_rss(hv, 0); 401 if (err) { 402 PMD_DRV_LOG(NOTICE, 403 "rss reconfig failed (RSS disabled)"); 404 return err; 405 } 406 } 407 408 return hn_vf_rss_hash_update(dev, rss_conf); 409 } 410 411 static int hn_rss_hash_conf_get(struct rte_eth_dev *dev, 412 struct rte_eth_rss_conf *rss_conf) 413 { 414 struct hn_data *hv = dev->data->dev_private; 415 416 PMD_INIT_FUNC_TRACE(); 417 418 if (hv->ndis_ver < NDIS_VERSION_6_20) { 419 PMD_DRV_LOG(DEBUG, "RSS not supported on this host"); 420 return -EOPNOTSUPP; 421 } 422 423 rss_conf->rss_key_len = NDIS_HASH_KEYSIZE_TOEPLITZ; 424 if (rss_conf->rss_key) 425 memcpy(rss_conf->rss_key, hv->rss_key, 426 NDIS_HASH_KEYSIZE_TOEPLITZ); 427 428 rss_conf->rss_hf = 0; 429 if (hv->rss_hash & NDIS_HASH_IPV4) 430 rss_conf->rss_hf |= RTE_ETH_RSS_IPV4; 431 432 if (hv->rss_hash & NDIS_HASH_TCP_IPV4) 433 rss_conf->rss_hf |= RTE_ETH_RSS_NONFRAG_IPV4_TCP; 434 435 if (hv->rss_hash & NDIS_HASH_IPV6) 436 rss_conf->rss_hf |= RTE_ETH_RSS_IPV6; 437 438 if (hv->rss_hash & NDIS_HASH_IPV6_EX) 439 rss_conf->rss_hf |= RTE_ETH_RSS_IPV6_EX; 440 441 if (hv->rss_hash & NDIS_HASH_TCP_IPV6) 442 rss_conf->rss_hf |= RTE_ETH_RSS_NONFRAG_IPV6_TCP; 443 444 if (hv->rss_hash & NDIS_HASH_TCP_IPV6_EX) 445 rss_conf->rss_hf |= RTE_ETH_RSS_IPV6_TCP_EX; 446 447 return 0; 448 } 449 450 static int 451 hn_dev_promiscuous_enable(struct rte_eth_dev *dev) 452 { 453 struct hn_data *hv = dev->data->dev_private; 454 455 hn_rndis_set_rxfilter(hv, NDIS_PACKET_TYPE_PROMISCUOUS); 456 return hn_vf_promiscuous_enable(dev); 457 } 458 459 static int 460 hn_dev_promiscuous_disable(struct rte_eth_dev *dev) 461 { 462 struct hn_data *hv = dev->data->dev_private; 463 uint32_t filter; 464 465 filter = NDIS_PACKET_TYPE_DIRECTED | NDIS_PACKET_TYPE_BROADCAST; 466 if (dev->data->all_multicast) 467 filter |= NDIS_PACKET_TYPE_ALL_MULTICAST; 468 hn_rndis_set_rxfilter(hv, filter); 469 return hn_vf_promiscuous_disable(dev); 470 } 471 472 static int 473 hn_dev_allmulticast_enable(struct rte_eth_dev *dev) 474 { 475 struct hn_data *hv = dev->data->dev_private; 476 477 hn_rndis_set_rxfilter(hv, NDIS_PACKET_TYPE_DIRECTED | 478 NDIS_PACKET_TYPE_ALL_MULTICAST | 479 NDIS_PACKET_TYPE_BROADCAST); 480 return hn_vf_allmulticast_enable(dev); 481 } 482 483 static int 484 hn_dev_allmulticast_disable(struct rte_eth_dev *dev) 485 { 486 struct hn_data *hv = dev->data->dev_private; 487 488 hn_rndis_set_rxfilter(hv, NDIS_PACKET_TYPE_DIRECTED | 489 NDIS_PACKET_TYPE_BROADCAST); 490 return hn_vf_allmulticast_disable(dev); 491 } 492 493 static int 494 hn_dev_mc_addr_list(struct rte_eth_dev *dev, 495 struct rte_ether_addr *mc_addr_set, 496 uint32_t nb_mc_addr) 497 { 498 /* No filtering on the synthetic path, but can do it on VF */ 499 return hn_vf_mc_addr_list(dev, mc_addr_set, nb_mc_addr); 500 } 501 502 /* Setup shared rx/tx queue data */ 503 static int hn_subchan_configure(struct hn_data *hv, 504 uint32_t subchan) 505 { 506 struct vmbus_channel *primary = hn_primary_chan(hv); 507 int err; 508 unsigned int retry = 0; 509 510 PMD_DRV_LOG(DEBUG, 511 "open %u subchannels", subchan); 512 513 /* Send create sub channels command */ 514 err = hn_nvs_alloc_subchans(hv, &subchan); 515 if (err) 516 return err; 517 518 while (subchan > 0) { 519 struct vmbus_channel *new_sc; 520 uint16_t chn_index; 521 522 err = rte_vmbus_subchan_open(primary, &new_sc); 523 if (err == -ENOENT && ++retry < 1000) { 524 /* This can happen if not ready yet */ 525 rte_delay_ms(10); 526 continue; 527 } 528 529 if (err) { 530 PMD_DRV_LOG(ERR, 531 "open subchannel failed: %d", err); 532 return err; 533 } 534 535 rte_vmbus_set_latency(hv->vmbus, new_sc, hv->latency); 536 537 retry = 0; 538 chn_index = rte_vmbus_sub_channel_index(new_sc); 539 if (chn_index == 0 || chn_index > hv->max_queues) { 540 PMD_DRV_LOG(ERR, 541 "Invalid subchannel offermsg channel %u", 542 chn_index); 543 return -EIO; 544 } 545 546 PMD_DRV_LOG(DEBUG, "new sub channel %u", chn_index); 547 hv->channels[chn_index] = new_sc; 548 --subchan; 549 } 550 551 return err; 552 } 553 554 static void netvsc_hotplug_retry(void *args) 555 { 556 int ret; 557 struct hn_data *hv = args; 558 struct rte_eth_dev *dev = &rte_eth_devices[hv->port_id]; 559 struct rte_devargs *d = &hv->devargs; 560 char buf[256]; 561 562 DIR *di; 563 struct dirent *dir; 564 struct ifreq req; 565 struct rte_ether_addr eth_addr; 566 int s; 567 568 PMD_DRV_LOG(DEBUG, "%s: retry count %d", 569 __func__, hv->eal_hot_plug_retry); 570 571 if (hv->eal_hot_plug_retry++ > NETVSC_MAX_HOTADD_RETRY) 572 return; 573 574 snprintf(buf, sizeof(buf), "/sys/bus/pci/devices/%s/net", d->name); 575 di = opendir(buf); 576 if (!di) { 577 PMD_DRV_LOG(DEBUG, "%s: can't open directory %s, " 578 "retrying in 1 second", __func__, buf); 579 goto retry; 580 } 581 582 while ((dir = readdir(di))) { 583 /* Skip . and .. directories */ 584 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, "..")) 585 continue; 586 587 /* trying to get mac address if this is a network device*/ 588 s = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP); 589 if (s == -1) { 590 PMD_DRV_LOG(ERR, "Failed to create socket errno %d", 591 errno); 592 break; 593 } 594 strlcpy(req.ifr_name, dir->d_name, sizeof(req.ifr_name)); 595 ret = ioctl(s, SIOCGIFHWADDR, &req); 596 close(s); 597 if (ret == -1) { 598 PMD_DRV_LOG(ERR, 599 "Failed to send SIOCGIFHWADDR for device %s", 600 dir->d_name); 601 break; 602 } 603 if (req.ifr_hwaddr.sa_family != ARPHRD_ETHER) { 604 closedir(di); 605 return; 606 } 607 memcpy(eth_addr.addr_bytes, req.ifr_hwaddr.sa_data, 608 RTE_DIM(eth_addr.addr_bytes)); 609 610 if (rte_is_same_ether_addr(ð_addr, dev->data->mac_addrs)) { 611 PMD_DRV_LOG(NOTICE, 612 "Found matching MAC address, adding device %s network name %s", 613 d->name, dir->d_name); 614 ret = rte_eal_hotplug_add(d->bus->name, d->name, 615 d->args); 616 if (ret) { 617 PMD_DRV_LOG(ERR, 618 "Failed to add PCI device %s", 619 d->name); 620 break; 621 } 622 } 623 /* When the code reaches here, we either have already added 624 * the device, or its MAC address did not match. 625 */ 626 closedir(di); 627 return; 628 } 629 closedir(di); 630 retry: 631 /* The device is still being initialized, retry after 1 second */ 632 rte_eal_alarm_set(1000000, netvsc_hotplug_retry, hv); 633 } 634 635 static void 636 netvsc_hotadd_callback(const char *device_name, enum rte_dev_event_type type, 637 void *arg) 638 { 639 struct hn_data *hv = arg; 640 struct rte_devargs *d = &hv->devargs; 641 int ret; 642 643 PMD_DRV_LOG(INFO, "Device notification type=%d device_name=%s", 644 type, device_name); 645 646 switch (type) { 647 case RTE_DEV_EVENT_ADD: 648 /* if we already has a VF, don't check on hot add */ 649 if (hv->vf_ctx.vf_state > vf_removed) 650 break; 651 652 ret = rte_devargs_parse(d, device_name); 653 if (ret) { 654 PMD_DRV_LOG(ERR, 655 "devargs parsing failed ret=%d", ret); 656 return; 657 } 658 659 if (!strcmp(d->bus->name, "pci")) { 660 /* Start the process of figuring out if this 661 * PCI device is a VF device 662 */ 663 hv->eal_hot_plug_retry = 0; 664 rte_eal_alarm_set(1000000, netvsc_hotplug_retry, hv); 665 } 666 667 /* We will switch to VF on RDNIS configure message 668 * sent from VSP 669 */ 670 671 break; 672 default: 673 break; 674 } 675 } 676 677 static int hn_dev_configure(struct rte_eth_dev *dev) 678 { 679 struct rte_eth_conf *dev_conf = &dev->data->dev_conf; 680 struct rte_eth_rss_conf *rss_conf = &dev_conf->rx_adv_conf.rss_conf; 681 const struct rte_eth_rxmode *rxmode = &dev_conf->rxmode; 682 const struct rte_eth_txmode *txmode = &dev_conf->txmode; 683 struct hn_data *hv = dev->data->dev_private; 684 uint64_t unsupported; 685 int i, err, subchan; 686 687 PMD_INIT_FUNC_TRACE(); 688 689 if (dev_conf->rxmode.mq_mode & RTE_ETH_MQ_RX_RSS_FLAG) 690 dev_conf->rxmode.offloads |= RTE_ETH_RX_OFFLOAD_RSS_HASH; 691 692 unsupported = txmode->offloads & ~HN_TX_OFFLOAD_CAPS; 693 if (unsupported) { 694 PMD_DRV_LOG(NOTICE, 695 "unsupported TX offload: %#" PRIx64, 696 unsupported); 697 return -EINVAL; 698 } 699 700 unsupported = rxmode->offloads & ~HN_RX_OFFLOAD_CAPS; 701 if (unsupported) { 702 PMD_DRV_LOG(NOTICE, 703 "unsupported RX offload: %#" PRIx64, 704 rxmode->offloads); 705 return -EINVAL; 706 } 707 708 hv->vlan_strip = !!(rxmode->offloads & RTE_ETH_RX_OFFLOAD_VLAN_STRIP); 709 710 err = hn_rndis_conf_offload(hv, txmode->offloads, 711 rxmode->offloads); 712 if (err) { 713 PMD_DRV_LOG(NOTICE, 714 "offload configure failed"); 715 return err; 716 } 717 718 hv->num_queues = RTE_MAX(dev->data->nb_rx_queues, 719 dev->data->nb_tx_queues); 720 721 for (i = 0; i < NDIS_HASH_INDCNT; i++) 722 hv->rss_ind[i] = i % dev->data->nb_rx_queues; 723 724 hn_rss_hash_init(hv, rss_conf); 725 726 subchan = hv->num_queues - 1; 727 if (subchan > 0) { 728 err = hn_subchan_configure(hv, subchan); 729 if (err) { 730 PMD_DRV_LOG(NOTICE, 731 "subchannel configuration failed"); 732 return err; 733 } 734 735 err = hn_rndis_conf_rss(hv, NDIS_RSS_FLAG_DISABLE); 736 if (err) { 737 PMD_DRV_LOG(NOTICE, 738 "rss disable failed"); 739 return err; 740 } 741 742 if (rss_conf->rss_hf != 0) { 743 err = hn_rndis_conf_rss(hv, 0); 744 if (err) { 745 PMD_DRV_LOG(NOTICE, 746 "initial RSS config failed"); 747 return err; 748 } 749 } 750 } 751 752 return hn_vf_configure_locked(dev, dev_conf); 753 } 754 755 static int hn_dev_stats_get(struct rte_eth_dev *dev, 756 struct rte_eth_stats *stats) 757 { 758 unsigned int i; 759 760 hn_vf_stats_get(dev, stats); 761 762 for (i = 0; i < dev->data->nb_tx_queues; i++) { 763 const struct hn_tx_queue *txq = dev->data->tx_queues[i]; 764 765 if (!txq) 766 continue; 767 768 stats->opackets += txq->stats.packets; 769 stats->obytes += txq->stats.bytes; 770 stats->oerrors += txq->stats.errors; 771 772 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) { 773 stats->q_opackets[i] = txq->stats.packets; 774 stats->q_obytes[i] = txq->stats.bytes; 775 } 776 } 777 778 for (i = 0; i < dev->data->nb_rx_queues; i++) { 779 const struct hn_rx_queue *rxq = dev->data->rx_queues[i]; 780 781 if (!rxq) 782 continue; 783 784 stats->ipackets += rxq->stats.packets; 785 stats->ibytes += rxq->stats.bytes; 786 stats->ierrors += rxq->stats.errors; 787 stats->imissed += rxq->stats.ring_full; 788 789 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) { 790 stats->q_ipackets[i] = rxq->stats.packets; 791 stats->q_ibytes[i] = rxq->stats.bytes; 792 } 793 } 794 795 stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed; 796 return 0; 797 } 798 799 static int 800 hn_dev_stats_reset(struct rte_eth_dev *dev) 801 { 802 unsigned int i; 803 804 PMD_INIT_FUNC_TRACE(); 805 806 for (i = 0; i < dev->data->nb_tx_queues; i++) { 807 struct hn_tx_queue *txq = dev->data->tx_queues[i]; 808 809 if (!txq) 810 continue; 811 memset(&txq->stats, 0, sizeof(struct hn_stats)); 812 } 813 814 for (i = 0; i < dev->data->nb_rx_queues; i++) { 815 struct hn_rx_queue *rxq = dev->data->rx_queues[i]; 816 817 if (!rxq) 818 continue; 819 820 memset(&rxq->stats, 0, sizeof(struct hn_stats)); 821 } 822 823 return 0; 824 } 825 826 static int 827 hn_dev_xstats_reset(struct rte_eth_dev *dev) 828 { 829 int ret; 830 831 ret = hn_dev_stats_reset(dev); 832 if (ret != 0) 833 return 0; 834 835 return hn_vf_xstats_reset(dev); 836 } 837 838 static int 839 hn_dev_xstats_count(struct rte_eth_dev *dev) 840 { 841 int ret, count; 842 843 count = dev->data->nb_tx_queues * RTE_DIM(hn_stat_strings); 844 count += dev->data->nb_rx_queues * RTE_DIM(hn_stat_strings); 845 846 ret = hn_vf_xstats_get_names(dev, NULL, 0); 847 if (ret < 0) 848 return ret; 849 850 return count + ret; 851 } 852 853 static int 854 hn_dev_xstats_get_names(struct rte_eth_dev *dev, 855 struct rte_eth_xstat_name *xstats_names, 856 unsigned int limit) 857 { 858 unsigned int i, t, count = 0; 859 int ret; 860 861 if (!xstats_names) 862 return hn_dev_xstats_count(dev); 863 864 /* Note: limit checked in rte_eth_xstats_names() */ 865 for (i = 0; i < dev->data->nb_tx_queues; i++) { 866 const struct hn_tx_queue *txq = dev->data->tx_queues[i]; 867 868 if (!txq) 869 continue; 870 871 if (count >= limit) 872 break; 873 874 for (t = 0; t < RTE_DIM(hn_stat_strings); t++) 875 snprintf(xstats_names[count++].name, 876 RTE_ETH_XSTATS_NAME_SIZE, 877 "tx_q%u_%s", i, hn_stat_strings[t].name); 878 } 879 880 for (i = 0; i < dev->data->nb_rx_queues; i++) { 881 const struct hn_rx_queue *rxq = dev->data->rx_queues[i]; 882 883 if (!rxq) 884 continue; 885 886 if (count >= limit) 887 break; 888 889 for (t = 0; t < RTE_DIM(hn_stat_strings); t++) 890 snprintf(xstats_names[count++].name, 891 RTE_ETH_XSTATS_NAME_SIZE, 892 "rx_q%u_%s", i, 893 hn_stat_strings[t].name); 894 } 895 896 ret = hn_vf_xstats_get_names(dev, xstats_names + count, 897 limit - count); 898 if (ret < 0) 899 return ret; 900 901 return count + ret; 902 } 903 904 static int 905 hn_dev_xstats_get(struct rte_eth_dev *dev, 906 struct rte_eth_xstat *xstats, 907 unsigned int n) 908 { 909 unsigned int i, t, count = 0; 910 const unsigned int nstats = hn_dev_xstats_count(dev); 911 const char *stats; 912 int ret; 913 914 PMD_INIT_FUNC_TRACE(); 915 916 if (n < nstats) 917 return nstats; 918 919 for (i = 0; i < dev->data->nb_tx_queues; i++) { 920 const struct hn_tx_queue *txq = dev->data->tx_queues[i]; 921 922 if (!txq) 923 continue; 924 925 stats = (const char *)&txq->stats; 926 for (t = 0; t < RTE_DIM(hn_stat_strings); t++, count++) { 927 xstats[count].id = count; 928 xstats[count].value = *(const uint64_t *) 929 (stats + hn_stat_strings[t].offset); 930 } 931 } 932 933 for (i = 0; i < dev->data->nb_rx_queues; i++) { 934 const struct hn_rx_queue *rxq = dev->data->rx_queues[i]; 935 936 if (!rxq) 937 continue; 938 939 stats = (const char *)&rxq->stats; 940 for (t = 0; t < RTE_DIM(hn_stat_strings); t++, count++) { 941 xstats[count].id = count; 942 xstats[count].value = *(const uint64_t *) 943 (stats + hn_stat_strings[t].offset); 944 } 945 } 946 947 ret = hn_vf_xstats_get(dev, xstats, count, n); 948 if (ret < 0) 949 return ret; 950 951 return count + ret; 952 } 953 954 static int 955 hn_dev_start(struct rte_eth_dev *dev) 956 { 957 struct hn_data *hv = dev->data->dev_private; 958 int error; 959 960 PMD_INIT_FUNC_TRACE(); 961 962 /* Register to monitor hot plug events */ 963 error = rte_dev_event_callback_register(NULL, netvsc_hotadd_callback, 964 hv); 965 if (error) { 966 PMD_DRV_LOG(ERR, "failed to register device event callback"); 967 return error; 968 } 969 970 error = hn_rndis_set_rxfilter(hv, 971 NDIS_PACKET_TYPE_BROADCAST | 972 NDIS_PACKET_TYPE_ALL_MULTICAST | 973 NDIS_PACKET_TYPE_DIRECTED); 974 if (error) 975 return error; 976 977 error = hn_vf_start(dev); 978 if (error) 979 hn_rndis_set_rxfilter(hv, 0); 980 981 /* Initialize Link state */ 982 if (error == 0) 983 hn_dev_link_update(dev, 0); 984 985 return error; 986 } 987 988 static int 989 hn_dev_stop(struct rte_eth_dev *dev) 990 { 991 struct hn_data *hv = dev->data->dev_private; 992 993 PMD_INIT_FUNC_TRACE(); 994 dev->data->dev_started = 0; 995 996 rte_dev_event_callback_unregister(NULL, netvsc_hotadd_callback, hv); 997 hn_rndis_set_rxfilter(hv, 0); 998 return hn_vf_stop(dev); 999 } 1000 1001 static int 1002 hn_dev_close(struct rte_eth_dev *dev) 1003 { 1004 int ret; 1005 struct hn_data *hv = dev->data->dev_private; 1006 1007 PMD_INIT_FUNC_TRACE(); 1008 if (rte_eal_process_type() != RTE_PROC_PRIMARY) 1009 return 0; 1010 1011 rte_eal_alarm_cancel(netvsc_hotplug_retry, &hv->devargs); 1012 1013 ret = hn_vf_close(dev); 1014 hn_dev_free_queues(dev); 1015 1016 return ret; 1017 } 1018 1019 static const struct eth_dev_ops hn_eth_dev_ops = { 1020 .dev_configure = hn_dev_configure, 1021 .dev_start = hn_dev_start, 1022 .dev_stop = hn_dev_stop, 1023 .dev_close = hn_dev_close, 1024 .dev_infos_get = hn_dev_info_get, 1025 .txq_info_get = hn_dev_tx_queue_info, 1026 .rxq_info_get = hn_dev_rx_queue_info, 1027 .dev_supported_ptypes_get = hn_vf_supported_ptypes, 1028 .promiscuous_enable = hn_dev_promiscuous_enable, 1029 .promiscuous_disable = hn_dev_promiscuous_disable, 1030 .allmulticast_enable = hn_dev_allmulticast_enable, 1031 .allmulticast_disable = hn_dev_allmulticast_disable, 1032 .set_mc_addr_list = hn_dev_mc_addr_list, 1033 .reta_update = hn_rss_reta_update, 1034 .reta_query = hn_rss_reta_query, 1035 .rss_hash_update = hn_rss_hash_update, 1036 .rss_hash_conf_get = hn_rss_hash_conf_get, 1037 .tx_queue_setup = hn_dev_tx_queue_setup, 1038 .tx_queue_release = hn_dev_tx_queue_release, 1039 .tx_done_cleanup = hn_dev_tx_done_cleanup, 1040 .rx_queue_setup = hn_dev_rx_queue_setup, 1041 .rx_queue_release = hn_dev_rx_queue_release, 1042 .link_update = hn_dev_link_update, 1043 .stats_get = hn_dev_stats_get, 1044 .stats_reset = hn_dev_stats_reset, 1045 .xstats_get = hn_dev_xstats_get, 1046 .xstats_get_names = hn_dev_xstats_get_names, 1047 .xstats_reset = hn_dev_xstats_reset, 1048 }; 1049 1050 /* 1051 * Setup connection between PMD and kernel. 1052 */ 1053 static int 1054 hn_attach(struct hn_data *hv, unsigned int mtu) 1055 { 1056 int error; 1057 1058 /* Attach NVS */ 1059 error = hn_nvs_attach(hv, mtu); 1060 if (error) 1061 goto failed_nvs; 1062 1063 /* Attach RNDIS */ 1064 error = hn_rndis_attach(hv); 1065 if (error) 1066 goto failed_rndis; 1067 1068 /* 1069 * NOTE: 1070 * Under certain conditions on certain versions of Hyper-V, 1071 * the RNDIS rxfilter is _not_ zero on the hypervisor side 1072 * after the successful RNDIS initialization. 1073 */ 1074 hn_rndis_set_rxfilter(hv, NDIS_PACKET_TYPE_NONE); 1075 return 0; 1076 failed_rndis: 1077 hn_nvs_detach(hv); 1078 failed_nvs: 1079 return error; 1080 } 1081 1082 static void 1083 hn_detach(struct hn_data *hv) 1084 { 1085 hn_nvs_detach(hv); 1086 hn_rndis_detach(hv); 1087 } 1088 1089 static int 1090 eth_hn_dev_init(struct rte_eth_dev *eth_dev) 1091 { 1092 struct hn_data *hv = eth_dev->data->dev_private; 1093 struct rte_device *device = eth_dev->device; 1094 struct rte_vmbus_device *vmbus; 1095 unsigned int rxr_cnt; 1096 int err, max_chan; 1097 1098 PMD_INIT_FUNC_TRACE(); 1099 1100 vmbus = container_of(device, struct rte_vmbus_device, device); 1101 eth_dev->dev_ops = &hn_eth_dev_ops; 1102 eth_dev->rx_queue_count = hn_dev_rx_queue_count; 1103 eth_dev->rx_descriptor_status = hn_dev_rx_queue_status; 1104 eth_dev->tx_descriptor_status = hn_dev_tx_descriptor_status; 1105 eth_dev->tx_pkt_burst = &hn_xmit_pkts; 1106 eth_dev->rx_pkt_burst = &hn_recv_pkts; 1107 1108 /* 1109 * for secondary processes, we don't initialize any further as primary 1110 * has already done this work. 1111 */ 1112 if (rte_eal_process_type() != RTE_PROC_PRIMARY) 1113 return 0; 1114 1115 eth_dev->data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS; 1116 1117 /* Since Hyper-V only supports one MAC address */ 1118 eth_dev->data->mac_addrs = rte_calloc("hv_mac", HN_MAX_MAC_ADDRS, 1119 sizeof(struct rte_ether_addr), 0); 1120 if (eth_dev->data->mac_addrs == NULL) { 1121 PMD_INIT_LOG(ERR, 1122 "Failed to allocate memory store MAC addresses"); 1123 return -ENOMEM; 1124 } 1125 1126 hv->vmbus = vmbus; 1127 hv->rxbuf_res = &vmbus->resource[HV_RECV_BUF_MAP]; 1128 hv->chim_res = &vmbus->resource[HV_SEND_BUF_MAP]; 1129 hv->port_id = eth_dev->data->port_id; 1130 hv->latency = HN_CHAN_LATENCY_NS; 1131 hv->rx_copybreak = HN_RXCOPY_THRESHOLD; 1132 hv->tx_copybreak = HN_TXCOPY_THRESHOLD; 1133 hv->rx_extmbuf_enable = HN_RX_EXTMBUF_ENABLE; 1134 hv->max_queues = 1; 1135 1136 rte_rwlock_init(&hv->vf_lock); 1137 hv->vf_ctx.vf_vsc_switched = false; 1138 hv->vf_ctx.vf_vsp_reported = false; 1139 hv->vf_ctx.vf_attached = false; 1140 hv->vf_ctx.vf_state = vf_unknown; 1141 1142 err = hn_parse_args(eth_dev); 1143 if (err) 1144 return err; 1145 1146 strlcpy(hv->owner.name, eth_dev->device->name, 1147 RTE_ETH_MAX_OWNER_NAME_LEN); 1148 err = rte_eth_dev_owner_new(&hv->owner.id); 1149 if (err) { 1150 PMD_INIT_LOG(ERR, "Can not get owner id"); 1151 return err; 1152 } 1153 1154 /* Initialize primary channel input for control operations */ 1155 err = rte_vmbus_chan_open(vmbus, &hv->channels[0]); 1156 if (err) 1157 return err; 1158 1159 rte_vmbus_set_latency(hv->vmbus, hv->channels[0], hv->latency); 1160 1161 hv->primary = hn_rx_queue_alloc(hv, 0, 1162 eth_dev->device->numa_node); 1163 1164 if (!hv->primary) 1165 return -ENOMEM; 1166 1167 err = hn_attach(hv, RTE_ETHER_MTU); 1168 if (err) 1169 goto failed; 1170 1171 err = hn_chim_init(eth_dev); 1172 if (err) 1173 goto failed; 1174 1175 err = hn_rndis_get_eaddr(hv, eth_dev->data->mac_addrs->addr_bytes); 1176 if (err) 1177 goto failed; 1178 1179 /* Multi queue requires later versions of windows server */ 1180 if (hv->nvs_ver < NVS_VERSION_5) 1181 return 0; 1182 1183 max_chan = rte_vmbus_max_channels(vmbus); 1184 PMD_INIT_LOG(DEBUG, "VMBus max channels %d", max_chan); 1185 if (max_chan <= 0) 1186 goto failed; 1187 1188 if (hn_rndis_query_rsscaps(hv, &rxr_cnt) != 0) 1189 rxr_cnt = 1; 1190 1191 hv->max_queues = RTE_MIN(rxr_cnt, (unsigned int)max_chan); 1192 1193 /* If VF was reported but not added, do it now */ 1194 if (hv->vf_ctx.vf_vsp_reported && !hv->vf_ctx.vf_vsc_switched) { 1195 PMD_INIT_LOG(DEBUG, "Adding VF device"); 1196 1197 err = hn_vf_add(eth_dev, hv); 1198 } 1199 1200 return 0; 1201 1202 failed: 1203 PMD_INIT_LOG(NOTICE, "device init failed"); 1204 1205 hn_chim_uninit(eth_dev); 1206 hn_detach(hv); 1207 return err; 1208 } 1209 1210 static int 1211 eth_hn_dev_uninit(struct rte_eth_dev *eth_dev) 1212 { 1213 struct hn_data *hv = eth_dev->data->dev_private; 1214 int ret, ret_stop; 1215 1216 PMD_INIT_FUNC_TRACE(); 1217 1218 if (rte_eal_process_type() != RTE_PROC_PRIMARY) 1219 return 0; 1220 1221 ret_stop = hn_dev_stop(eth_dev); 1222 hn_dev_close(eth_dev); 1223 1224 hn_detach(hv); 1225 hn_chim_uninit(eth_dev); 1226 rte_vmbus_chan_close(hv->primary->chan); 1227 rte_free(hv->primary); 1228 ret = rte_eth_dev_owner_delete(hv->owner.id); 1229 if (ret != 0) 1230 return ret; 1231 1232 return ret_stop; 1233 } 1234 1235 static int eth_hn_probe(struct rte_vmbus_driver *drv __rte_unused, 1236 struct rte_vmbus_device *dev) 1237 { 1238 struct rte_eth_dev *eth_dev; 1239 int ret; 1240 1241 PMD_INIT_FUNC_TRACE(); 1242 1243 ret = rte_dev_event_monitor_start(); 1244 if (ret) { 1245 PMD_DRV_LOG(ERR, "Failed to start device event monitoring"); 1246 return ret; 1247 } 1248 1249 eth_dev = eth_dev_vmbus_allocate(dev, sizeof(struct hn_data)); 1250 if (!eth_dev) 1251 return -ENOMEM; 1252 1253 ret = eth_hn_dev_init(eth_dev); 1254 if (ret) { 1255 eth_dev_vmbus_release(eth_dev); 1256 rte_dev_event_monitor_stop(); 1257 } else { 1258 rte_eth_dev_probing_finish(eth_dev); 1259 } 1260 1261 return ret; 1262 } 1263 1264 static int eth_hn_remove(struct rte_vmbus_device *dev) 1265 { 1266 struct rte_eth_dev *eth_dev; 1267 int ret; 1268 1269 PMD_INIT_FUNC_TRACE(); 1270 1271 eth_dev = rte_eth_dev_allocated(dev->device.name); 1272 if (!eth_dev) 1273 return 0; /* port already released */ 1274 1275 ret = eth_hn_dev_uninit(eth_dev); 1276 if (ret) 1277 return ret; 1278 1279 eth_dev_vmbus_release(eth_dev); 1280 rte_dev_event_monitor_stop(); 1281 return 0; 1282 } 1283 1284 /* Network device GUID */ 1285 static const rte_uuid_t hn_net_ids[] = { 1286 /* f8615163-df3e-46c5-913f-f2d2f965ed0e */ 1287 RTE_UUID_INIT(0xf8615163, 0xdf3e, 0x46c5, 0x913f, 0xf2d2f965ed0eULL), 1288 { 0 } 1289 }; 1290 1291 static struct rte_vmbus_driver rte_netvsc_pmd = { 1292 .id_table = hn_net_ids, 1293 .probe = eth_hn_probe, 1294 .remove = eth_hn_remove, 1295 }; 1296 1297 RTE_PMD_REGISTER_VMBUS(net_netvsc, rte_netvsc_pmd); 1298 RTE_PMD_REGISTER_KMOD_DEP(net_netvsc, "* uio_hv_generic"); 1299 RTE_LOG_REGISTER_SUFFIX(hn_logtype_init, init, NOTICE); 1300 RTE_LOG_REGISTER_SUFFIX(hn_logtype_driver, driver, NOTICE); 1301 RTE_PMD_REGISTER_PARAM_STRING(net_netvsc, 1302 NETVSC_ARG_LATENCY "=<uint32> " 1303 NETVSC_ARG_RXBREAK "=<uint32> " 1304 NETVSC_ARG_TXBREAK "=<uint32> " 1305 NETVSC_ARG_RX_EXTMBUF_ENABLE "=<0|1>"); 1306