drivers/net/netvsc/hn_ethdev.c

   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 <sys/ioctl.h>
  16
  17 #include <rte_ethdev.h>
  18 #include <rte_memcpy.h>
  19 #include <rte_string_fns.h>
  20 #include <rte_memzone.h>
  21 #include <rte_devargs.h>
  22 #include <rte_malloc.h>
  23 #include <rte_kvargs.h>
  24 #include <rte_atomic.h>
  25 #include <rte_branch_prediction.h>
  26 #include <rte_ether.h>
  27 #include <ethdev_driver.h>
  28 #include <rte_cycles.h>
  29 #include <rte_errno.h>
  30 #include <rte_memory.h>
  31 #include <rte_eal.h>
  32 #include <rte_dev.h>
  33 #include <rte_bus_vmbus.h>
  34 #include <rte_alarm.h>
  35
  36 #include "hn_logs.h"
  37 #include "hn_var.h"
  38 #include "hn_rndis.h"
  39 #include "hn_nvs.h"
  40 #include "ndis.h"
  41
  42 #define HN_TX_OFFLOAD_CAPS (DEV_TX_OFFLOAD_IPV4_CKSUM | \
  43                             DEV_TX_OFFLOAD_TCP_CKSUM  | \
  44                             DEV_TX_OFFLOAD_UDP_CKSUM  | \
  45                             DEV_TX_OFFLOAD_TCP_TSO    | \
  46                             DEV_TX_OFFLOAD_MULTI_SEGS | \
  47                             DEV_TX_OFFLOAD_VLAN_INSERT)
  48
  49 #define HN_RX_OFFLOAD_CAPS (DEV_RX_OFFLOAD_CHECKSUM | \
  50                             DEV_RX_OFFLOAD_VLAN_STRIP | \
  51                             DEV_RX_OFFLOAD_RSS_HASH)
  52
  53 #define NETVSC_ARG_LATENCY "latency"
  54 #define NETVSC_ARG_RXBREAK "rx_copybreak"
  55 #define NETVSC_ARG_TXBREAK "tx_copybreak"
  56 #define NETVSC_ARG_RX_EXTMBUF_ENABLE "rx_extmbuf_enable"
  57
  58 /* The max number of retry when hot adding a VF device */
  59 #define NETVSC_MAX_HOTADD_RETRY 10
  60
  61 struct hn_xstats_name_off {
  62         char name[RTE_ETH_XSTATS_NAME_SIZE];
  63         unsigned int offset;
  64 };
  65
  66 static const struct hn_xstats_name_off hn_stat_strings[] = {
  67         { "good_packets",           offsetof(struct hn_stats, packets) },
  68         { "good_bytes",             offsetof(struct hn_stats, bytes) },
  69         { "errors",                 offsetof(struct hn_stats, errors) },
  70         { "ring full",              offsetof(struct hn_stats, ring_full) },
  71         { "channel full",           offsetof(struct hn_stats, channel_full) },
  72         { "multicast_packets",      offsetof(struct hn_stats, multicast) },
  73         { "broadcast_packets",      offsetof(struct hn_stats, broadcast) },
  74         { "undersize_packets",      offsetof(struct hn_stats, size_bins[0]) },
  75         { "size_64_packets",        offsetof(struct hn_stats, size_bins[1]) },
  76         { "size_65_127_packets",    offsetof(struct hn_stats, size_bins[2]) },
  77         { "size_128_255_packets",   offsetof(struct hn_stats, size_bins[3]) },
  78         { "size_256_511_packets",   offsetof(struct hn_stats, size_bins[4]) },
  79         { "size_512_1023_packets",  offsetof(struct hn_stats, size_bins[5]) },
  80         { "size_1024_1518_packets", offsetof(struct hn_stats, size_bins[6]) },
  81         { "size_1519_max_packets",  offsetof(struct hn_stats, size_bins[7]) },
  82 };
  83
  84 /* The default RSS key.
  85  * This value is the same as MLX5 so that flows will be
  86  * received on same path for both VF and synthetic NIC.
  87  */
  88 static const uint8_t rss_default_key[NDIS_HASH_KEYSIZE_TOEPLITZ] = {
  89         0x2c, 0xc6, 0x81, 0xd1, 0x5b, 0xdb, 0xf4, 0xf7,
  90         0xfc, 0xa2, 0x83, 0x19, 0xdb, 0x1a, 0x3e, 0x94,
  91         0x6b, 0x9e, 0x38, 0xd9, 0x2c, 0x9c, 0x03, 0xd1,
  92         0xad, 0x99, 0x44, 0xa7, 0xd9, 0x56, 0x3d, 0x59,
  93         0x06, 0x3c, 0x25, 0xf3, 0xfc, 0x1f, 0xdc, 0x2a,
  94 };
  95
  96 static struct rte_eth_dev *
  97 eth_dev_vmbus_allocate(struct rte_vmbus_device *dev, size_t private_data_size)
  98 {
  99         struct rte_eth_dev *eth_dev;
 100         const char *name;
 101
 102         if (!dev)
 103                 return NULL;
 104
 105         name = dev->device.name;
 106
 107         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
 108                 eth_dev = rte_eth_dev_allocate(name);
 109                 if (!eth_dev) {
 110                         PMD_DRV_LOG(NOTICE, "can not allocate rte ethdev");
 111                         return NULL;
 112                 }
 113
 114                 if (private_data_size) {
 115                         eth_dev->data->dev_private =
 116                                 rte_zmalloc_socket(name, private_data_size,
 117                                                      RTE_CACHE_LINE_SIZE, dev->device.numa_node);
 118                         if (!eth_dev->data->dev_private) {
 119                                 PMD_DRV_LOG(NOTICE, "can not allocate driver data");
 120                                 rte_eth_dev_release_port(eth_dev);
 121                                 return NULL;
 122                         }
 123                 }
 124         } else {
 125                 eth_dev = rte_eth_dev_attach_secondary(name);
 126                 if (!eth_dev) {
 127                         PMD_DRV_LOG(NOTICE, "can not attach secondary");
 128                         return NULL;
 129                 }
 130         }
 131
 132         eth_dev->device = &dev->device;
 133
 134         /* interrupt is simulated */
 135         dev->intr_handle.type = RTE_INTR_HANDLE_EXT;
 136         eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
 137         eth_dev->intr_handle = &dev->intr_handle;
 138
 139         return eth_dev;
 140 }
 141
 142 static void
 143 eth_dev_vmbus_release(struct rte_eth_dev *eth_dev)
 144 {
 145         /* free ether device */
 146         rte_eth_dev_release_port(eth_dev);
 147
 148         eth_dev->device = NULL;
 149         eth_dev->intr_handle = NULL;
 150 }
 151
 152 static int hn_set_parameter(const char *key, const char *value, void *opaque)
 153 {
 154         struct hn_data *hv = opaque;
 155         char *endp = NULL;
 156         unsigned long v;
 157
 158         v = strtoul(value, &endp, 0);
 159         if (*value == '\0' || *endp != '\0') {
 160                 PMD_DRV_LOG(ERR, "invalid parameter %s=%s", key, value);
 161                 return -EINVAL;
 162         }
 163
 164         if (!strcmp(key, NETVSC_ARG_LATENCY)) {
 165                 /* usec to nsec */
 166                 hv->latency = v * 1000;
 167                 PMD_DRV_LOG(DEBUG, "set latency %u usec", hv->latency);
 168         } else if (!strcmp(key, NETVSC_ARG_RXBREAK)) {
 169                 hv->rx_copybreak = v;
 170                 PMD_DRV_LOG(DEBUG, "rx copy break set to %u",
 171                             hv->rx_copybreak);
 172         } else if (!strcmp(key, NETVSC_ARG_TXBREAK)) {
 173                 hv->tx_copybreak = v;
 174                 PMD_DRV_LOG(DEBUG, "tx copy break set to %u",
 175                             hv->tx_copybreak);
 176         } else if (!strcmp(key, NETVSC_ARG_RX_EXTMBUF_ENABLE)) {
 177                 hv->rx_extmbuf_enable = v;
 178                 PMD_DRV_LOG(DEBUG, "rx extmbuf enable set to %u",
 179                             hv->rx_extmbuf_enable);
 180         }
 181
 182         return 0;
 183 }
 184
 185 /* Parse device arguments */
 186 static int hn_parse_args(const struct rte_eth_dev *dev)
 187 {
 188         struct hn_data *hv = dev->data->dev_private;
 189         struct rte_devargs *devargs = dev->device->devargs;
 190         static const char * const valid_keys[] = {
 191                 NETVSC_ARG_LATENCY,
 192                 NETVSC_ARG_RXBREAK,
 193                 NETVSC_ARG_TXBREAK,
 194                 NETVSC_ARG_RX_EXTMBUF_ENABLE,
 195                 NULL
 196         };
 197         struct rte_kvargs *kvlist;
 198         int ret;
 199
 200         if (!devargs)
 201                 return 0;
 202
 203         PMD_INIT_LOG(DEBUG, "device args %s %s",
 204                      devargs->name, devargs->args);
 205
 206         kvlist = rte_kvargs_parse(devargs->args, valid_keys);
 207         if (!kvlist) {
 208                 PMD_DRV_LOG(ERR, "invalid parameters");
 209                 return -EINVAL;
 210         }
 211
 212         ret = rte_kvargs_process(kvlist, NULL, hn_set_parameter, hv);
 213         rte_kvargs_free(kvlist);
 214
 215         return ret;
 216 }
 217
 218 /* Update link status.
 219  * Note: the DPDK definition of "wait_to_complete"
 220  *   means block this call until link is up.
 221  *   which is not worth supporting.
 222  */
 223 int
 224 hn_dev_link_update(struct rte_eth_dev *dev,
 225                    int wait_to_complete __rte_unused)
 226 {
 227         struct hn_data *hv = dev->data->dev_private;
 228         struct rte_eth_link link, old;
 229         int error;
 230
 231         old = dev->data->dev_link;
 232
 233         error = hn_rndis_get_linkstatus(hv);
 234         if (error)
 235                 return error;
 236
 237         hn_rndis_get_linkspeed(hv);
 238
 239         link = (struct rte_eth_link) {
 240                 .link_duplex = ETH_LINK_FULL_DUPLEX,
 241                 .link_autoneg = ETH_LINK_SPEED_FIXED,
 242                 .link_speed = hv->link_speed / 10000,
 243         };
 244
 245         if (hv->link_status == NDIS_MEDIA_STATE_CONNECTED)
 246                 link.link_status = ETH_LINK_UP;
 247         else
 248                 link.link_status = ETH_LINK_DOWN;
 249
 250         if (old.link_status == link.link_status)
 251                 return 0;
 252
 253         PMD_INIT_LOG(DEBUG, "Port %d is %s", dev->data->port_id,
 254                      (link.link_status == ETH_LINK_UP) ? "up" : "down");
 255
 256         return rte_eth_linkstatus_set(dev, &link);
 257 }
 258
 259 static int hn_dev_info_get(struct rte_eth_dev *dev,
 260                            struct rte_eth_dev_info *dev_info)
 261 {
 262         struct hn_data *hv = dev->data->dev_private;
 263         int rc;
 264
 265         dev_info->speed_capa = ETH_LINK_SPEED_10G;
 266         dev_info->min_rx_bufsize = HN_MIN_RX_BUF_SIZE;
 267         dev_info->max_rx_pktlen  = HN_MAX_XFER_LEN;
 268         dev_info->max_mac_addrs  = 1;
 269
 270         dev_info->hash_key_size = NDIS_HASH_KEYSIZE_TOEPLITZ;
 271         dev_info->flow_type_rss_offloads = hv->rss_offloads;
 272         dev_info->reta_size = ETH_RSS_RETA_SIZE_128;
 273
 274         dev_info->max_rx_queues = hv->max_queues;
 275         dev_info->max_tx_queues = hv->max_queues;
 276
 277         dev_info->tx_desc_lim.nb_min = 1;
 278         dev_info->tx_desc_lim.nb_max = 4096;
 279
 280         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 281                 return 0;
 282
 283         /* fills in rx and tx offload capability */
 284         rc = hn_rndis_get_offload(hv, dev_info);
 285         if (rc != 0)
 286                 return rc;
 287
 288         /* merges the offload and queues of vf */
 289         return hn_vf_info_get(hv, dev_info);
 290 }
 291
 292 static int hn_rss_reta_update(struct rte_eth_dev *dev,
 293                               struct rte_eth_rss_reta_entry64 *reta_conf,
 294                               uint16_t reta_size)
 295 {
 296         struct hn_data *hv = dev->data->dev_private;
 297         unsigned int i;
 298         int err;
 299
 300         PMD_INIT_FUNC_TRACE();
 301
 302         if (reta_size != NDIS_HASH_INDCNT) {
 303                 PMD_DRV_LOG(ERR, "Hash lookup table size does not match NDIS");
 304                 return -EINVAL;
 305         }
 306
 307         for (i = 0; i < NDIS_HASH_INDCNT; i++) {
 308                 uint16_t idx = i / RTE_RETA_GROUP_SIZE;
 309                 uint16_t shift = i % RTE_RETA_GROUP_SIZE;
 310                 uint64_t mask = (uint64_t)1 << shift;
 311
 312                 if (reta_conf[idx].mask & mask)
 313                         hv->rss_ind[i] = reta_conf[idx].reta[shift];
 314         }
 315
 316         err = hn_rndis_conf_rss(hv, NDIS_RSS_FLAG_DISABLE);
 317         if (err) {
 318                 PMD_DRV_LOG(NOTICE,
 319                         "rss disable failed");
 320                 return err;
 321         }
 322
 323         err = hn_rndis_conf_rss(hv, 0);
 324         if (err) {
 325                 PMD_DRV_LOG(NOTICE,
 326                             "reta reconfig failed");
 327                 return err;
 328         }
 329
 330         return hn_vf_reta_hash_update(dev, reta_conf, reta_size);
 331 }
 332
 333 static int hn_rss_reta_query(struct rte_eth_dev *dev,
 334                              struct rte_eth_rss_reta_entry64 *reta_conf,
 335                              uint16_t reta_size)
 336 {
 337         struct hn_data *hv = dev->data->dev_private;
 338         unsigned int i;
 339
 340         PMD_INIT_FUNC_TRACE();
 341
 342         if (reta_size != NDIS_HASH_INDCNT) {
 343                 PMD_DRV_LOG(ERR, "Hash lookup table size does not match NDIS");
 344                 return -EINVAL;
 345         }
 346
 347         for (i = 0; i < NDIS_HASH_INDCNT; i++) {
 348                 uint16_t idx = i / RTE_RETA_GROUP_SIZE;
 349                 uint16_t shift = i % RTE_RETA_GROUP_SIZE;
 350                 uint64_t mask = (uint64_t)1 << shift;
 351
 352                 if (reta_conf[idx].mask & mask)
 353                         reta_conf[idx].reta[shift] = hv->rss_ind[i];
 354         }
 355         return 0;
 356 }
 357
 358 static void hn_rss_hash_init(struct hn_data *hv,
 359                              const struct rte_eth_rss_conf *rss_conf)
 360 {
 361         /* Convert from DPDK RSS hash flags to NDIS hash flags */
 362         hv->rss_hash = NDIS_HASH_FUNCTION_TOEPLITZ;
 363
 364         if (rss_conf->rss_hf & ETH_RSS_IPV4)
 365                 hv->rss_hash |= NDIS_HASH_IPV4;
 366         if (rss_conf->rss_hf & ETH_RSS_NONFRAG_IPV4_TCP)
 367                 hv->rss_hash |= NDIS_HASH_TCP_IPV4;
 368         if (rss_conf->rss_hf & ETH_RSS_IPV6)
 369                 hv->rss_hash |=  NDIS_HASH_IPV6;
 370         if (rss_conf->rss_hf & ETH_RSS_IPV6_EX)
 371                 hv->rss_hash |=  NDIS_HASH_IPV6_EX;
 372         if (rss_conf->rss_hf & ETH_RSS_NONFRAG_IPV6_TCP)
 373                 hv->rss_hash |= NDIS_HASH_TCP_IPV6;
 374         if (rss_conf->rss_hf & ETH_RSS_IPV6_TCP_EX)
 375                 hv->rss_hash |= NDIS_HASH_TCP_IPV6_EX;
 376
 377         memcpy(hv->rss_key, rss_conf->rss_key ? : rss_default_key,
 378                NDIS_HASH_KEYSIZE_TOEPLITZ);
 379 }
 380
 381 static int hn_rss_hash_update(struct rte_eth_dev *dev,
 382                               struct rte_eth_rss_conf *rss_conf)
 383 {
 384         struct hn_data *hv = dev->data->dev_private;
 385         int err;
 386
 387         PMD_INIT_FUNC_TRACE();
 388
 389         err = hn_rndis_conf_rss(hv, NDIS_RSS_FLAG_DISABLE);
 390         if (err) {
 391                 PMD_DRV_LOG(NOTICE,
 392                             "rss disable failed");
 393                 return err;
 394         }
 395
 396         hn_rss_hash_init(hv, rss_conf);
 397
 398         if (rss_conf->rss_hf != 0) {
 399                 err = hn_rndis_conf_rss(hv, 0);
 400                 if (err) {
 401                         PMD_DRV_LOG(NOTICE,
 402                                     "rss reconfig failed (RSS disabled)");
 403                         return err;
 404                 }
 405         }
 406
 407         return hn_vf_rss_hash_update(dev, rss_conf);
 408 }
 409
 410 static int hn_rss_hash_conf_get(struct rte_eth_dev *dev,
 411                                 struct rte_eth_rss_conf *rss_conf)
 412 {
 413         struct hn_data *hv = dev->data->dev_private;
 414
 415         PMD_INIT_FUNC_TRACE();
 416
 417         if (hv->ndis_ver < NDIS_VERSION_6_20) {
 418                 PMD_DRV_LOG(DEBUG, "RSS not supported on this host");
 419                 return -EOPNOTSUPP;
 420         }
 421
 422         rss_conf->rss_key_len = NDIS_HASH_KEYSIZE_TOEPLITZ;
 423         if (rss_conf->rss_key)
 424                 memcpy(rss_conf->rss_key, hv->rss_key,
 425                        NDIS_HASH_KEYSIZE_TOEPLITZ);
 426
 427         rss_conf->rss_hf = 0;
 428         if (hv->rss_hash & NDIS_HASH_IPV4)
 429                 rss_conf->rss_hf |= ETH_RSS_IPV4;
 430
 431         if (hv->rss_hash & NDIS_HASH_TCP_IPV4)
 432                 rss_conf->rss_hf |= ETH_RSS_NONFRAG_IPV4_TCP;
 433
 434         if (hv->rss_hash & NDIS_HASH_IPV6)
 435                 rss_conf->rss_hf |= ETH_RSS_IPV6;
 436
 437         if (hv->rss_hash & NDIS_HASH_IPV6_EX)
 438                 rss_conf->rss_hf |= ETH_RSS_IPV6_EX;
 439
 440         if (hv->rss_hash & NDIS_HASH_TCP_IPV6)
 441                 rss_conf->rss_hf |= ETH_RSS_NONFRAG_IPV6_TCP;
 442
 443         if (hv->rss_hash & NDIS_HASH_TCP_IPV6_EX)
 444                 rss_conf->rss_hf |= ETH_RSS_IPV6_TCP_EX;
 445
 446         return 0;
 447 }
 448
 449 static int
 450 hn_dev_promiscuous_enable(struct rte_eth_dev *dev)
 451 {
 452         struct hn_data *hv = dev->data->dev_private;
 453
 454         hn_rndis_set_rxfilter(hv, NDIS_PACKET_TYPE_PROMISCUOUS);
 455         return hn_vf_promiscuous_enable(dev);
 456 }
 457
 458 static int
 459 hn_dev_promiscuous_disable(struct rte_eth_dev *dev)
 460 {
 461         struct hn_data *hv = dev->data->dev_private;
 462         uint32_t filter;
 463
 464         filter = NDIS_PACKET_TYPE_DIRECTED | NDIS_PACKET_TYPE_BROADCAST;
 465         if (dev->data->all_multicast)
 466                 filter |= NDIS_PACKET_TYPE_ALL_MULTICAST;
 467         hn_rndis_set_rxfilter(hv, filter);
 468         return hn_vf_promiscuous_disable(dev);
 469 }
 470
 471 static int
 472 hn_dev_allmulticast_enable(struct rte_eth_dev *dev)
 473 {
 474         struct hn_data *hv = dev->data->dev_private;
 475
 476         hn_rndis_set_rxfilter(hv, NDIS_PACKET_TYPE_DIRECTED |
 477                               NDIS_PACKET_TYPE_ALL_MULTICAST |
 478                         NDIS_PACKET_TYPE_BROADCAST);
 479         return hn_vf_allmulticast_enable(dev);
 480 }
 481
 482 static int
 483 hn_dev_allmulticast_disable(struct rte_eth_dev *dev)
 484 {
 485         struct hn_data *hv = dev->data->dev_private;
 486
 487         hn_rndis_set_rxfilter(hv, NDIS_PACKET_TYPE_DIRECTED |
 488                              NDIS_PACKET_TYPE_BROADCAST);
 489         return hn_vf_allmulticast_disable(dev);
 490 }
 491
 492 static int
 493 hn_dev_mc_addr_list(struct rte_eth_dev *dev,
 494                      struct rte_ether_addr *mc_addr_set,
 495                      uint32_t nb_mc_addr)
 496 {
 497         /* No filtering on the synthetic path, but can do it on VF */
 498         return hn_vf_mc_addr_list(dev, mc_addr_set, nb_mc_addr);
 499 }
 500
 501 /* Setup shared rx/tx queue data */
 502 static int hn_subchan_configure(struct hn_data *hv,
 503                                 uint32_t subchan)
 504 {
 505         struct vmbus_channel *primary = hn_primary_chan(hv);
 506         int err;
 507         unsigned int retry = 0;
 508
 509         PMD_DRV_LOG(DEBUG,
 510                     "open %u subchannels", subchan);
 511
 512         /* Send create sub channels command */
 513         err = hn_nvs_alloc_subchans(hv, &subchan);
 514         if (err)
 515                 return  err;
 516
 517         while (subchan > 0) {
 518                 struct vmbus_channel *new_sc;
 519                 uint16_t chn_index;
 520
 521                 err = rte_vmbus_subchan_open(primary, &new_sc);
 522                 if (err == -ENOENT && ++retry < 1000) {
 523                         /* This can happen if not ready yet */
 524                         rte_delay_ms(10);
 525                         continue;
 526                 }
 527
 528                 if (err) {
 529                         PMD_DRV_LOG(ERR,
 530                                     "open subchannel failed: %d", err);
 531                         return err;
 532                 }
 533
 534                 rte_vmbus_set_latency(hv->vmbus, new_sc, hv->latency);
 535
 536                 retry = 0;
 537                 chn_index = rte_vmbus_sub_channel_index(new_sc);
 538                 if (chn_index == 0 || chn_index > hv->max_queues) {
 539                         PMD_DRV_LOG(ERR,
 540                                     "Invalid subchannel offermsg channel %u",
 541                                     chn_index);
 542                         return -EIO;
 543                 }
 544
 545                 PMD_DRV_LOG(DEBUG, "new sub channel %u", chn_index);
 546                 hv->channels[chn_index] = new_sc;
 547                 --subchan;
 548         }
 549
 550         return err;
 551 }
 552
 553 static void netvsc_hotplug_retry(void *args)
 554 {
 555         int ret;
 556         struct hn_data *hv = args;
 557         struct rte_eth_dev *dev = &rte_eth_devices[hv->port_id];
 558         struct rte_devargs *d = &hv->devargs;
 559         char buf[256];
 560
 561         DIR *di;
 562         struct dirent *dir;
 563         struct ifreq req;
 564         struct rte_ether_addr eth_addr;
 565         int s;
 566
 567         PMD_DRV_LOG(DEBUG, "%s: retry count %d\n",
 568                     __func__, hv->eal_hot_plug_retry);
 569
 570         if (hv->eal_hot_plug_retry++ > NETVSC_MAX_HOTADD_RETRY)
 571                 return;
 572
 573         snprintf(buf, sizeof(buf), "/sys/bus/pci/devices/%s/net", d->name);
 574         di = opendir(buf);
 575         if (!di) {
 576                 PMD_DRV_LOG(DEBUG, "%s: can't open directory %s, "
 577                             "retrying in 1 second\n", __func__, buf);
 578                 goto retry;
 579         }
 580
 581         while ((dir = readdir(di))) {
 582                 /* Skip . and .. directories */
 583                 if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
 584                         continue;
 585
 586                 /* trying to get mac address if this is a network device*/
 587                 s = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
 588                 if (s == -1) {
 589                         PMD_DRV_LOG(ERR, "Failed to create socket errno %d\n",
 590                                     errno);
 591                         break;
 592                 }
 593                 strlcpy(req.ifr_name, dir->d_name, sizeof(req.ifr_name));
 594                 ret = ioctl(s, SIOCGIFHWADDR, &req);
 595                 close(s);
 596                 if (ret == -1) {
 597                         PMD_DRV_LOG(ERR, "Failed to send SIOCGIFHWADDR for "
 598                                     "device %s\n", dir->d_name);
 599                         break;
 600                 }
 601                 if (req.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 602                         closedir(di);
 603                         return;
 604                 }
 605                 memcpy(eth_addr.addr_bytes, req.ifr_hwaddr.sa_data,
 606                        RTE_DIM(eth_addr.addr_bytes));
 607
 608                 if (rte_is_same_ether_addr(&eth_addr, dev->data->mac_addrs)) {
 609                         PMD_DRV_LOG(NOTICE, "Found matching MAC address, "
 610                                     "adding device %s network name %s\n",
 611                                     d->name, dir->d_name);
 612                         ret = rte_eal_hotplug_add(d->bus->name, d->name,
 613                                                   d->args);
 614                         if (ret) {
 615                                 PMD_DRV_LOG(ERR,
 616                                             "Failed to add PCI device %s\n",
 617                                             d->name);
 618                                 break;
 619                         }
 620                 }
 621                 /* When the code reaches here, we either have already added
 622                  * the device, or its MAC address did not match.
 623                  */
 624                 closedir(di);
 625                 return;
 626         }
 627         closedir(di);
 628 retry:
 629         /* The device is still being initialized, retry after 1 second */
 630         rte_eal_alarm_set(1000000, netvsc_hotplug_retry, hv);
 631 }
 632
 633 static void
 634 netvsc_hotadd_callback(const char *device_name, enum rte_dev_event_type type,
 635                        void *arg)
 636 {
 637         struct hn_data *hv = arg;
 638         struct rte_devargs *d = &hv->devargs;
 639         int ret;
 640
 641         PMD_DRV_LOG(INFO, "Device notification type=%d device_name=%s\n",
 642                     type, device_name);
 643
 644         switch (type) {
 645         case RTE_DEV_EVENT_ADD:
 646                 /* if we already has a VF, don't check on hot add */
 647                 if (hv->vf_ctx.vf_state > vf_removed)
 648                         break;
 649
 650                 ret = rte_devargs_parse(d, device_name);
 651                 if (ret) {
 652                         PMD_DRV_LOG(ERR,
 653                                     "devargs parsing failed ret=%d\n", ret);
 654                         return;
 655                 }
 656
 657                 if (!strcmp(d->bus->name, "pci")) {
 658                         /* Start the process of figuring out if this
 659                          * PCI device is a VF device
 660                          */
 661                         hv->eal_hot_plug_retry = 0;
 662                         rte_eal_alarm_set(1000000, netvsc_hotplug_retry, hv);
 663                 }
 664
 665                 /* We will switch to VF on RDNIS configure message
 666                  * sent from VSP
 667                  */
 668
 669                 break;
 670         default:
 671                 break;
 672         }
 673 }
 674
 675 static int hn_dev_configure(struct rte_eth_dev *dev)
 676 {
 677         struct rte_eth_conf *dev_conf = &dev->data->dev_conf;
 678         struct rte_eth_rss_conf *rss_conf = &dev_conf->rx_adv_conf.rss_conf;
 679         const struct rte_eth_rxmode *rxmode = &dev_conf->rxmode;
 680         const struct rte_eth_txmode *txmode = &dev_conf->txmode;
 681         struct hn_data *hv = dev->data->dev_private;
 682         uint64_t unsupported;
 683         int i, err, subchan;
 684
 685         PMD_INIT_FUNC_TRACE();
 686
 687         if (dev_conf->rxmode.mq_mode & ETH_MQ_RX_RSS_FLAG)
 688                 dev_conf->rxmode.offloads |= DEV_RX_OFFLOAD_RSS_HASH;
 689
 690         unsupported = txmode->offloads & ~HN_TX_OFFLOAD_CAPS;
 691         if (unsupported) {
 692                 PMD_DRV_LOG(NOTICE,
 693                             "unsupported TX offload: %#" PRIx64,
 694                             unsupported);
 695                 return -EINVAL;
 696         }
 697
 698         unsupported = rxmode->offloads & ~HN_RX_OFFLOAD_CAPS;
 699         if (unsupported) {
 700                 PMD_DRV_LOG(NOTICE,
 701                             "unsupported RX offload: %#" PRIx64,
 702                             rxmode->offloads);
 703                 return -EINVAL;
 704         }
 705
 706         hv->vlan_strip = !!(rxmode->offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
 707
 708         err = hn_rndis_conf_offload(hv, txmode->offloads,
 709                                     rxmode->offloads);
 710         if (err) {
 711                 PMD_DRV_LOG(NOTICE,
 712                             "offload configure failed");
 713                 return err;
 714         }
 715
 716         hv->num_queues = RTE_MAX(dev->data->nb_rx_queues,
 717                                  dev->data->nb_tx_queues);
 718
 719         for (i = 0; i < NDIS_HASH_INDCNT; i++)
 720                 hv->rss_ind[i] = i % dev->data->nb_rx_queues;
 721
 722         hn_rss_hash_init(hv, rss_conf);
 723
 724         subchan = hv->num_queues - 1;
 725         if (subchan > 0) {
 726                 err = hn_subchan_configure(hv, subchan);
 727                 if (err) {
 728                         PMD_DRV_LOG(NOTICE,
 729                                     "subchannel configuration failed");
 730                         return err;
 731                 }
 732
 733                 err = hn_rndis_conf_rss(hv, NDIS_RSS_FLAG_DISABLE);
 734                 if (err) {
 735                         PMD_DRV_LOG(NOTICE,
 736                                 "rss disable failed");
 737                         return err;
 738                 }
 739
 740                 if (rss_conf->rss_hf != 0) {
 741                         err = hn_rndis_conf_rss(hv, 0);
 742                         if (err) {
 743                                 PMD_DRV_LOG(NOTICE,
 744                                             "initial RSS config failed");
 745                                 return err;
 746                         }
 747                 }
 748         }
 749
 750         return hn_vf_configure_locked(dev, dev_conf);
 751 }
 752
 753 static int hn_dev_stats_get(struct rte_eth_dev *dev,
 754                             struct rte_eth_stats *stats)
 755 {
 756         unsigned int i;
 757
 758         hn_vf_stats_get(dev, stats);
 759
 760         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 761                 const struct hn_tx_queue *txq = dev->data->tx_queues[i];
 762
 763                 if (!txq)
 764                         continue;
 765
 766                 stats->opackets += txq->stats.packets;
 767                 stats->obytes += txq->stats.bytes;
 768                 stats->oerrors += txq->stats.errors;
 769
 770                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 771                         stats->q_opackets[i] = txq->stats.packets;
 772                         stats->q_obytes[i] = txq->stats.bytes;
 773                 }
 774         }
 775
 776         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 777                 const struct hn_rx_queue *rxq = dev->data->rx_queues[i];
 778
 779                 if (!rxq)
 780                         continue;
 781
 782                 stats->ipackets += rxq->stats.packets;
 783                 stats->ibytes += rxq->stats.bytes;
 784                 stats->ierrors += rxq->stats.errors;
 785                 stats->imissed += rxq->stats.ring_full;
 786
 787                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 788                         stats->q_ipackets[i] = rxq->stats.packets;
 789                         stats->q_ibytes[i] = rxq->stats.bytes;
 790                 }
 791         }
 792
 793         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 794         return 0;
 795 }
 796
 797 static int
 798 hn_dev_stats_reset(struct rte_eth_dev *dev)
 799 {
 800         unsigned int i;
 801
 802         PMD_INIT_FUNC_TRACE();
 803
 804         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 805                 struct hn_tx_queue *txq = dev->data->tx_queues[i];
 806
 807                 if (!txq)
 808                         continue;
 809                 memset(&txq->stats, 0, sizeof(struct hn_stats));
 810         }
 811
 812         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 813                 struct hn_rx_queue *rxq = dev->data->rx_queues[i];
 814
 815                 if (!rxq)
 816                         continue;
 817
 818                 memset(&rxq->stats, 0, sizeof(struct hn_stats));
 819         }
 820
 821         return 0;
 822 }
 823
 824 static int
 825 hn_dev_xstats_reset(struct rte_eth_dev *dev)
 826 {
 827         int ret;
 828
 829         ret = hn_dev_stats_reset(dev);
 830         if (ret != 0)
 831                 return 0;
 832
 833         return hn_vf_xstats_reset(dev);
 834 }
 835
 836 static int
 837 hn_dev_xstats_count(struct rte_eth_dev *dev)
 838 {
 839         int ret, count;
 840
 841         count = dev->data->nb_tx_queues * RTE_DIM(hn_stat_strings);
 842         count += dev->data->nb_rx_queues * RTE_DIM(hn_stat_strings);
 843
 844         ret = hn_vf_xstats_get_names(dev, NULL, 0);
 845         if (ret < 0)
 846                 return ret;
 847
 848         return count + ret;
 849 }
 850
 851 static int
 852 hn_dev_xstats_get_names(struct rte_eth_dev *dev,
 853                         struct rte_eth_xstat_name *xstats_names,
 854                         unsigned int limit)
 855 {
 856         unsigned int i, t, count = 0;
 857         int ret;
 858
 859         if (!xstats_names)
 860                 return hn_dev_xstats_count(dev);
 861
 862         /* Note: limit checked in rte_eth_xstats_names() */
 863         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 864                 const struct hn_tx_queue *txq = dev->data->tx_queues[i];
 865
 866                 if (!txq)
 867                         continue;
 868
 869                 if (count >= limit)
 870                         break;
 871
 872                 for (t = 0; t < RTE_DIM(hn_stat_strings); t++)
 873                         snprintf(xstats_names[count++].name,
 874                                  RTE_ETH_XSTATS_NAME_SIZE,
 875                                  "tx_q%u_%s", i, hn_stat_strings[t].name);
 876         }
 877
 878         for (i = 0; i < dev->data->nb_rx_queues; i++)  {
 879                 const struct hn_rx_queue *rxq = dev->data->rx_queues[i];
 880
 881                 if (!rxq)
 882                         continue;
 883
 884                 if (count >= limit)
 885                         break;
 886
 887                 for (t = 0; t < RTE_DIM(hn_stat_strings); t++)
 888                         snprintf(xstats_names[count++].name,
 889                                  RTE_ETH_XSTATS_NAME_SIZE,
 890                                  "rx_q%u_%s", i,
 891                                  hn_stat_strings[t].name);
 892         }
 893
 894         ret = hn_vf_xstats_get_names(dev, xstats_names + count,
 895                                      limit - count);
 896         if (ret < 0)
 897                 return ret;
 898
 899         return count + ret;
 900 }
 901
 902 static int
 903 hn_dev_xstats_get(struct rte_eth_dev *dev,
 904                   struct rte_eth_xstat *xstats,
 905                   unsigned int n)
 906 {
 907         unsigned int i, t, count = 0;
 908         const unsigned int nstats = hn_dev_xstats_count(dev);
 909         const char *stats;
 910         int ret;
 911
 912         PMD_INIT_FUNC_TRACE();
 913
 914         if (n < nstats)
 915                 return nstats;
 916
 917         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 918                 const struct hn_tx_queue *txq = dev->data->tx_queues[i];
 919
 920                 if (!txq)
 921                         continue;
 922
 923                 stats = (const char *)&txq->stats;
 924                 for (t = 0; t < RTE_DIM(hn_stat_strings); t++, count++) {
 925                         xstats[count].id = count;
 926                         xstats[count].value = *(const uint64_t *)
 927                                 (stats + hn_stat_strings[t].offset);
 928                 }
 929         }
 930
 931         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 932                 const struct hn_rx_queue *rxq = dev->data->rx_queues[i];
 933
 934                 if (!rxq)
 935                         continue;
 936
 937                 stats = (const char *)&rxq->stats;
 938                 for (t = 0; t < RTE_DIM(hn_stat_strings); t++, count++) {
 939                         xstats[count].id = count;
 940                         xstats[count].value = *(const uint64_t *)
 941                                 (stats + hn_stat_strings[t].offset);
 942                 }
 943         }
 944
 945         ret = hn_vf_xstats_get(dev, xstats, count, n);
 946         if (ret < 0)
 947                 return ret;
 948
 949         return count + ret;
 950 }
 951
 952 static int
 953 hn_dev_start(struct rte_eth_dev *dev)
 954 {
 955         struct hn_data *hv = dev->data->dev_private;
 956         int error;
 957
 958         PMD_INIT_FUNC_TRACE();
 959
 960         /* Register to monitor hot plug events */
 961         error = rte_dev_event_callback_register(NULL, netvsc_hotadd_callback,
 962                                                 hv);
 963         if (error) {
 964                 PMD_DRV_LOG(ERR, "failed to register device event callback\n");
 965                 return error;
 966         }
 967
 968         error = hn_rndis_set_rxfilter(hv,
 969                                       NDIS_PACKET_TYPE_BROADCAST |
 970                                       NDIS_PACKET_TYPE_ALL_MULTICAST |
 971                                       NDIS_PACKET_TYPE_DIRECTED);
 972         if (error)
 973                 return error;
 974
 975         error = hn_vf_start(dev);
 976         if (error)
 977                 hn_rndis_set_rxfilter(hv, 0);
 978
 979         /* Initialize Link state */
 980         if (error == 0)
 981                 hn_dev_link_update(dev, 0);
 982
 983         return error;
 984 }
 985
 986 static int
 987 hn_dev_stop(struct rte_eth_dev *dev)
 988 {
 989         struct hn_data *hv = dev->data->dev_private;
 990
 991         PMD_INIT_FUNC_TRACE();
 992         dev->data->dev_started = 0;
 993
 994         rte_dev_event_callback_unregister(NULL, netvsc_hotadd_callback, hv);
 995         hn_rndis_set_rxfilter(hv, 0);
 996         return hn_vf_stop(dev);
 997 }
 998
 999 static int
1000 hn_dev_close(struct rte_eth_dev *dev)
1001 {
1002         int ret;
1003         struct hn_data *hv = dev->data->dev_private;
1004
1005         PMD_INIT_FUNC_TRACE();
1006         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1007                 return 0;
1008
1009         rte_eal_alarm_cancel(netvsc_hotplug_retry, &hv->devargs);
1010
1011         ret = hn_vf_close(dev);
1012         hn_dev_free_queues(dev);
1013
1014         return ret;
1015 }
1016
1017 static const struct eth_dev_ops hn_eth_dev_ops = {
1018         .dev_configure          = hn_dev_configure,
1019         .dev_start              = hn_dev_start,
1020         .dev_stop               = hn_dev_stop,
1021         .dev_close              = hn_dev_close,
1022         .dev_infos_get          = hn_dev_info_get,
1023         .txq_info_get           = hn_dev_tx_queue_info,
1024         .rxq_info_get           = hn_dev_rx_queue_info,
1025         .dev_supported_ptypes_get = hn_vf_supported_ptypes,
1026         .promiscuous_enable     = hn_dev_promiscuous_enable,
1027         .promiscuous_disable    = hn_dev_promiscuous_disable,
1028         .allmulticast_enable    = hn_dev_allmulticast_enable,
1029         .allmulticast_disable   = hn_dev_allmulticast_disable,
1030         .set_mc_addr_list       = hn_dev_mc_addr_list,
1031         .reta_update            = hn_rss_reta_update,
1032         .reta_query             = hn_rss_reta_query,
1033         .rss_hash_update        = hn_rss_hash_update,
1034         .rss_hash_conf_get      = hn_rss_hash_conf_get,
1035         .tx_queue_setup         = hn_dev_tx_queue_setup,
1036         .tx_queue_release       = hn_dev_tx_queue_release,
1037         .tx_done_cleanup        = hn_dev_tx_done_cleanup,
1038         .rx_queue_setup         = hn_dev_rx_queue_setup,
1039         .rx_queue_release       = hn_dev_rx_queue_release,
1040         .link_update            = hn_dev_link_update,
1041         .stats_get              = hn_dev_stats_get,
1042         .stats_reset            = hn_dev_stats_reset,
1043         .xstats_get             = hn_dev_xstats_get,
1044         .xstats_get_names       = hn_dev_xstats_get_names,
1045         .xstats_reset           = hn_dev_xstats_reset,
1046 };
1047
1048 /*
1049  * Setup connection between PMD and kernel.
1050  */
1051 static int
1052 hn_attach(struct hn_data *hv, unsigned int mtu)
1053 {
1054         int error;
1055
1056         /* Attach NVS */
1057         error = hn_nvs_attach(hv, mtu);
1058         if (error)
1059                 goto failed_nvs;
1060
1061         /* Attach RNDIS */
1062         error = hn_rndis_attach(hv);
1063         if (error)
1064                 goto failed_rndis;
1065
1066         /*
1067          * NOTE:
1068          * Under certain conditions on certain versions of Hyper-V,
1069          * the RNDIS rxfilter is _not_ zero on the hypervisor side
1070          * after the successful RNDIS initialization.
1071          */
1072         hn_rndis_set_rxfilter(hv, NDIS_PACKET_TYPE_NONE);
1073         return 0;
1074 failed_rndis:
1075         hn_nvs_detach(hv);
1076 failed_nvs:
1077         return error;
1078 }
1079
1080 static void
1081 hn_detach(struct hn_data *hv)
1082 {
1083         hn_nvs_detach(hv);
1084         hn_rndis_detach(hv);
1085 }
1086
1087 static int
1088 eth_hn_dev_init(struct rte_eth_dev *eth_dev)
1089 {
1090         struct hn_data *hv = eth_dev->data->dev_private;
1091         struct rte_device *device = eth_dev->device;
1092         struct rte_vmbus_device *vmbus;
1093         unsigned int rxr_cnt;
1094         int err, max_chan;
1095
1096         PMD_INIT_FUNC_TRACE();
1097
1098         vmbus = container_of(device, struct rte_vmbus_device, device);
1099         eth_dev->dev_ops = &hn_eth_dev_ops;
1100         eth_dev->rx_queue_count = hn_dev_rx_queue_count;
1101         eth_dev->rx_descriptor_status = hn_dev_rx_queue_status;
1102         eth_dev->tx_descriptor_status = hn_dev_tx_descriptor_status;
1103         eth_dev->tx_pkt_burst = &hn_xmit_pkts;
1104         eth_dev->rx_pkt_burst = &hn_recv_pkts;
1105
1106         /*
1107          * for secondary processes, we don't initialize any further as primary
1108          * has already done this work.
1109          */
1110         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1111                 return 0;
1112
1113         eth_dev->data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
1114
1115         /* Since Hyper-V only supports one MAC address */
1116         eth_dev->data->mac_addrs = rte_calloc("hv_mac", HN_MAX_MAC_ADDRS,
1117                                               sizeof(struct rte_ether_addr), 0);
1118         if (eth_dev->data->mac_addrs == NULL) {
1119                 PMD_INIT_LOG(ERR,
1120                              "Failed to allocate memory store MAC addresses");
1121                 return -ENOMEM;
1122         }
1123
1124         hv->vmbus = vmbus;
1125         hv->rxbuf_res = &vmbus->resource[HV_RECV_BUF_MAP];
1126         hv->chim_res  = &vmbus->resource[HV_SEND_BUF_MAP];
1127         hv->port_id = eth_dev->data->port_id;
1128         hv->latency = HN_CHAN_LATENCY_NS;
1129         hv->rx_copybreak = HN_RXCOPY_THRESHOLD;
1130         hv->tx_copybreak = HN_TXCOPY_THRESHOLD;
1131         hv->rx_extmbuf_enable = HN_RX_EXTMBUF_ENABLE;
1132         hv->max_queues = 1;
1133
1134         rte_rwlock_init(&hv->vf_lock);
1135         hv->vf_ctx.vf_vsc_switched = false;
1136         hv->vf_ctx.vf_vsp_reported = false;
1137         hv->vf_ctx.vf_attached = false;
1138         hv->vf_ctx.vf_state = vf_unknown;
1139
1140         err = hn_parse_args(eth_dev);
1141         if (err)
1142                 return err;
1143
1144         strlcpy(hv->owner.name, eth_dev->device->name,
1145                 RTE_ETH_MAX_OWNER_NAME_LEN);
1146         err = rte_eth_dev_owner_new(&hv->owner.id);
1147         if (err) {
1148                 PMD_INIT_LOG(ERR, "Can not get owner id");
1149                 return err;
1150         }
1151
1152         /* Initialize primary channel input for control operations */
1153         err = rte_vmbus_chan_open(vmbus, &hv->channels[0]);
1154         if (err)
1155                 return err;
1156
1157         rte_vmbus_set_latency(hv->vmbus, hv->channels[0], hv->latency);
1158
1159         hv->primary = hn_rx_queue_alloc(hv, 0,
1160                                         eth_dev->device->numa_node);
1161
1162         if (!hv->primary)
1163                 return -ENOMEM;
1164
1165         err = hn_attach(hv, RTE_ETHER_MTU);
1166         if  (err)
1167                 goto failed;
1168
1169         err = hn_chim_init(eth_dev);
1170         if (err)
1171                 goto failed;
1172
1173         err = hn_rndis_get_eaddr(hv, eth_dev->data->mac_addrs->addr_bytes);
1174         if (err)
1175                 goto failed;
1176
1177         /* Multi queue requires later versions of windows server */
1178         if (hv->nvs_ver < NVS_VERSION_5)
1179                 return 0;
1180
1181         max_chan = rte_vmbus_max_channels(vmbus);
1182         PMD_INIT_LOG(DEBUG, "VMBus max channels %d", max_chan);
1183         if (max_chan <= 0)
1184                 goto failed;
1185
1186         if (hn_rndis_query_rsscaps(hv, &rxr_cnt) != 0)
1187                 rxr_cnt = 1;
1188
1189         hv->max_queues = RTE_MIN(rxr_cnt, (unsigned int)max_chan);
1190
1191         /* If VF was reported but not added, do it now */
1192         if (hv->vf_ctx.vf_vsp_reported && !hv->vf_ctx.vf_vsc_switched) {
1193                 PMD_INIT_LOG(DEBUG, "Adding VF device");
1194
1195                 err = hn_vf_add(eth_dev, hv);
1196         }
1197
1198         return 0;
1199
1200 failed:
1201         PMD_INIT_LOG(NOTICE, "device init failed");
1202
1203         hn_chim_uninit(eth_dev);
1204         hn_detach(hv);
1205         return err;
1206 }
1207
1208 static int
1209 eth_hn_dev_uninit(struct rte_eth_dev *eth_dev)
1210 {
1211         struct hn_data *hv = eth_dev->data->dev_private;
1212         int ret, ret_stop;
1213
1214         PMD_INIT_FUNC_TRACE();
1215
1216         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1217                 return 0;
1218
1219         ret_stop = hn_dev_stop(eth_dev);
1220         hn_dev_close(eth_dev);
1221
1222         hn_detach(hv);
1223         hn_chim_uninit(eth_dev);
1224         rte_vmbus_chan_close(hv->primary->chan);
1225         rte_free(hv->primary);
1226         ret = rte_eth_dev_owner_delete(hv->owner.id);
1227         if (ret != 0)
1228                 return ret;
1229
1230         return ret_stop;
1231 }
1232
1233 static int eth_hn_probe(struct rte_vmbus_driver *drv __rte_unused,
1234                         struct rte_vmbus_device *dev)
1235 {
1236         struct rte_eth_dev *eth_dev;
1237         int ret;
1238
1239         PMD_INIT_FUNC_TRACE();
1240
1241         ret = rte_dev_event_monitor_start();
1242         if (ret) {
1243                 PMD_DRV_LOG(ERR, "Failed to start device event monitoring\n");
1244                 return ret;
1245         }
1246
1247         eth_dev = eth_dev_vmbus_allocate(dev, sizeof(struct hn_data));
1248         if (!eth_dev)
1249                 return -ENOMEM;
1250
1251         ret = eth_hn_dev_init(eth_dev);
1252         if (ret) {
1253                 eth_dev_vmbus_release(eth_dev);
1254                 rte_dev_event_monitor_stop();
1255         } else {
1256                 rte_eth_dev_probing_finish(eth_dev);
1257         }
1258
1259         return ret;
1260 }
1261
1262 static int eth_hn_remove(struct rte_vmbus_device *dev)
1263 {
1264         struct rte_eth_dev *eth_dev;
1265         int ret;
1266
1267         PMD_INIT_FUNC_TRACE();
1268
1269         eth_dev = rte_eth_dev_allocated(dev->device.name);
1270         if (!eth_dev)
1271                 return 0; /* port already released */
1272
1273         ret = eth_hn_dev_uninit(eth_dev);
1274         if (ret)
1275                 return ret;
1276
1277         eth_dev_vmbus_release(eth_dev);
1278         rte_dev_event_monitor_stop();
1279         return 0;
1280 }
1281
1282 /* Network device GUID */
1283 static const rte_uuid_t hn_net_ids[] = {
1284         /*  f8615163-df3e-46c5-913f-f2d2f965ed0e */
1285         RTE_UUID_INIT(0xf8615163, 0xdf3e, 0x46c5, 0x913f, 0xf2d2f965ed0eULL),
1286         { 0 }
1287 };
1288
1289 static struct rte_vmbus_driver rte_netvsc_pmd = {
1290         .id_table = hn_net_ids,
1291         .probe = eth_hn_probe,
1292         .remove = eth_hn_remove,
1293 };
1294
1295 RTE_PMD_REGISTER_VMBUS(net_netvsc, rte_netvsc_pmd);
1296 RTE_PMD_REGISTER_KMOD_DEP(net_netvsc, "* uio_hv_generic");
1297 RTE_LOG_REGISTER(hn_logtype_init, pmd.net.netvsc.init, NOTICE);
1298 RTE_LOG_REGISTER(hn_logtype_driver, pmd.net.netvsc.driver, NOTICE);
1299 RTE_PMD_REGISTER_PARAM_STRING(net_netvsc,
1300                               NETVSC_ARG_LATENCY "=<uint32> "
1301                               NETVSC_ARG_RXBREAK "=<uint32> "
1302                               NETVSC_ARG_TXBREAK "=<uint32> "
1303                               NETVSC_ARG_RX_EXTMBUF_ENABLE "=<0|1>");