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",
 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", __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",
 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,
 598                                     "Failed to send SIOCGIFHWADDR for device %s",
 599                                     dir->d_name);
 600                         break;
 601                 }
 602                 if (req.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 603                         closedir(di);
 604                         return;
 605                 }
 606                 memcpy(eth_addr.addr_bytes, req.ifr_hwaddr.sa_data,
 607                        RTE_DIM(eth_addr.addr_bytes));
 608
 609                 if (rte_is_same_ether_addr(&eth_addr, dev->data->mac_addrs)) {
 610                         PMD_DRV_LOG(NOTICE,
 611                                     "Found matching MAC address, adding device %s network name %s",
 612                                     d->name, dir->d_name);
 613                         ret = rte_eal_hotplug_add(d->bus->name, d->name,
 614                                                   d->args);
 615                         if (ret) {
 616                                 PMD_DRV_LOG(ERR,
 617                                             "Failed to add PCI device %s",
 618                                             d->name);
 619                                 break;
 620                         }
 621                 }
 622                 /* When the code reaches here, we either have already added
 623                  * the device, or its MAC address did not match.
 624                  */
 625                 closedir(di);
 626                 return;
 627         }
 628         closedir(di);
 629 retry:
 630         /* The device is still being initialized, retry after 1 second */
 631         rte_eal_alarm_set(1000000, netvsc_hotplug_retry, hv);
 632 }
 633
 634 static void
 635 netvsc_hotadd_callback(const char *device_name, enum rte_dev_event_type type,
 636                        void *arg)
 637 {
 638         struct hn_data *hv = arg;
 639         struct rte_devargs *d = &hv->devargs;
 640         int ret;
 641
 642         PMD_DRV_LOG(INFO, "Device notification type=%d device_name=%s",
 643                     type, device_name);
 644
 645         switch (type) {
 646         case RTE_DEV_EVENT_ADD:
 647                 /* if we already has a VF, don't check on hot add */
 648                 if (hv->vf_ctx.vf_state > vf_removed)
 649                         break;
 650
 651                 ret = rte_devargs_parse(d, device_name);
 652                 if (ret) {
 653                         PMD_DRV_LOG(ERR,
 654                                     "devargs parsing failed ret=%d", ret);
 655                         return;
 656                 }
 657
 658                 if (!strcmp(d->bus->name, "pci")) {
 659                         /* Start the process of figuring out if this
 660                          * PCI device is a VF device
 661                          */
 662                         hv->eal_hot_plug_retry = 0;
 663                         rte_eal_alarm_set(1000000, netvsc_hotplug_retry, hv);
 664                 }
 665
 666                 /* We will switch to VF on RDNIS configure message
 667                  * sent from VSP
 668                  */
 669
 670                 break;
 671         default:
 672                 break;
 673         }
 674 }
 675
 676 static int hn_dev_configure(struct rte_eth_dev *dev)
 677 {
 678         struct rte_eth_conf *dev_conf = &dev->data->dev_conf;
 679         struct rte_eth_rss_conf *rss_conf = &dev_conf->rx_adv_conf.rss_conf;
 680         const struct rte_eth_rxmode *rxmode = &dev_conf->rxmode;
 681         const struct rte_eth_txmode *txmode = &dev_conf->txmode;
 682         struct hn_data *hv = dev->data->dev_private;
 683         uint64_t unsupported;
 684         int i, err, subchan;
 685
 686         PMD_INIT_FUNC_TRACE();
 687
 688         if (dev_conf->rxmode.mq_mode & ETH_MQ_RX_RSS_FLAG)
 689                 dev_conf->rxmode.offloads |= DEV_RX_OFFLOAD_RSS_HASH;
 690
 691         unsupported = txmode->offloads & ~HN_TX_OFFLOAD_CAPS;
 692         if (unsupported) {
 693                 PMD_DRV_LOG(NOTICE,
 694                             "unsupported TX offload: %#" PRIx64,
 695                             unsupported);
 696                 return -EINVAL;
 697         }
 698
 699         unsupported = rxmode->offloads & ~HN_RX_OFFLOAD_CAPS;
 700         if (unsupported) {
 701                 PMD_DRV_LOG(NOTICE,
 702                             "unsupported RX offload: %#" PRIx64,
 703                             rxmode->offloads);
 704                 return -EINVAL;
 705         }
 706
 707         hv->vlan_strip = !!(rxmode->offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
 708
 709         err = hn_rndis_conf_offload(hv, txmode->offloads,
 710                                     rxmode->offloads);
 711         if (err) {
 712                 PMD_DRV_LOG(NOTICE,
 713                             "offload configure failed");
 714                 return err;
 715         }
 716
 717         hv->num_queues = RTE_MAX(dev->data->nb_rx_queues,
 718                                  dev->data->nb_tx_queues);
 719
 720         for (i = 0; i < NDIS_HASH_INDCNT; i++)
 721                 hv->rss_ind[i] = i % dev->data->nb_rx_queues;
 722
 723         hn_rss_hash_init(hv, rss_conf);
 724
 725         subchan = hv->num_queues - 1;
 726         if (subchan > 0) {
 727                 err = hn_subchan_configure(hv, subchan);
 728                 if (err) {
 729                         PMD_DRV_LOG(NOTICE,
 730                                     "subchannel configuration failed");
 731                         return err;
 732                 }
 733
 734                 err = hn_rndis_conf_rss(hv, NDIS_RSS_FLAG_DISABLE);
 735                 if (err) {
 736                         PMD_DRV_LOG(NOTICE,
 737                                 "rss disable failed");
 738                         return err;
 739                 }
 740
 741                 if (rss_conf->rss_hf != 0) {
 742                         err = hn_rndis_conf_rss(hv, 0);
 743                         if (err) {
 744                                 PMD_DRV_LOG(NOTICE,
 745                                             "initial RSS config failed");
 746                                 return err;
 747                         }
 748                 }
 749         }
 750
 751         return hn_vf_configure_locked(dev, dev_conf);
 752 }
 753
 754 static int hn_dev_stats_get(struct rte_eth_dev *dev,
 755                             struct rte_eth_stats *stats)
 756 {
 757         unsigned int i;
 758
 759         hn_vf_stats_get(dev, stats);
 760
 761         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 762                 const struct hn_tx_queue *txq = dev->data->tx_queues[i];
 763
 764                 if (!txq)
 765                         continue;
 766
 767                 stats->opackets += txq->stats.packets;
 768                 stats->obytes += txq->stats.bytes;
 769                 stats->oerrors += txq->stats.errors;
 770
 771                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 772                         stats->q_opackets[i] = txq->stats.packets;
 773                         stats->q_obytes[i] = txq->stats.bytes;
 774                 }
 775         }
 776
 777         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 778                 const struct hn_rx_queue *rxq = dev->data->rx_queues[i];
 779
 780                 if (!rxq)
 781                         continue;
 782
 783                 stats->ipackets += rxq->stats.packets;
 784                 stats->ibytes += rxq->stats.bytes;
 785                 stats->ierrors += rxq->stats.errors;
 786                 stats->imissed += rxq->stats.ring_full;
 787
 788                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 789                         stats->q_ipackets[i] = rxq->stats.packets;
 790                         stats->q_ibytes[i] = rxq->stats.bytes;
 791                 }
 792         }
 793
 794         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 795         return 0;
 796 }
 797
 798 static int
 799 hn_dev_stats_reset(struct rte_eth_dev *dev)
 800 {
 801         unsigned int i;
 802
 803         PMD_INIT_FUNC_TRACE();
 804
 805         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 806                 struct hn_tx_queue *txq = dev->data->tx_queues[i];
 807
 808                 if (!txq)
 809                         continue;
 810                 memset(&txq->stats, 0, sizeof(struct hn_stats));
 811         }
 812
 813         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 814                 struct hn_rx_queue *rxq = dev->data->rx_queues[i];
 815
 816                 if (!rxq)
 817                         continue;
 818
 819                 memset(&rxq->stats, 0, sizeof(struct hn_stats));
 820         }
 821
 822         return 0;
 823 }
 824
 825 static int
 826 hn_dev_xstats_reset(struct rte_eth_dev *dev)
 827 {
 828         int ret;
 829
 830         ret = hn_dev_stats_reset(dev);
 831         if (ret != 0)
 832                 return 0;
 833
 834         return hn_vf_xstats_reset(dev);
 835 }
 836
 837 static int
 838 hn_dev_xstats_count(struct rte_eth_dev *dev)
 839 {
 840         int ret, count;
 841
 842         count = dev->data->nb_tx_queues * RTE_DIM(hn_stat_strings);
 843         count += dev->data->nb_rx_queues * RTE_DIM(hn_stat_strings);
 844
 845         ret = hn_vf_xstats_get_names(dev, NULL, 0);
 846         if (ret < 0)
 847                 return ret;
 848
 849         return count + ret;
 850 }
 851
 852 static int
 853 hn_dev_xstats_get_names(struct rte_eth_dev *dev,
 854                         struct rte_eth_xstat_name *xstats_names,
 855                         unsigned int limit)
 856 {
 857         unsigned int i, t, count = 0;
 858         int ret;
 859
 860         if (!xstats_names)
 861                 return hn_dev_xstats_count(dev);
 862
 863         /* Note: limit checked in rte_eth_xstats_names() */
 864         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 865                 const struct hn_tx_queue *txq = dev->data->tx_queues[i];
 866
 867                 if (!txq)
 868                         continue;
 869
 870                 if (count >= limit)
 871                         break;
 872
 873                 for (t = 0; t < RTE_DIM(hn_stat_strings); t++)
 874                         snprintf(xstats_names[count++].name,
 875                                  RTE_ETH_XSTATS_NAME_SIZE,
 876                                  "tx_q%u_%s", i, hn_stat_strings[t].name);
 877         }
 878
 879         for (i = 0; i < dev->data->nb_rx_queues; i++)  {
 880                 const struct hn_rx_queue *rxq = dev->data->rx_queues[i];
 881
 882                 if (!rxq)
 883                         continue;
 884
 885                 if (count >= limit)
 886                         break;
 887
 888                 for (t = 0; t < RTE_DIM(hn_stat_strings); t++)
 889                         snprintf(xstats_names[count++].name,
 890                                  RTE_ETH_XSTATS_NAME_SIZE,
 891                                  "rx_q%u_%s", i,
 892                                  hn_stat_strings[t].name);
 893         }
 894
 895         ret = hn_vf_xstats_get_names(dev, xstats_names + count,
 896                                      limit - count);
 897         if (ret < 0)
 898                 return ret;
 899
 900         return count + ret;
 901 }
 902
 903 static int
 904 hn_dev_xstats_get(struct rte_eth_dev *dev,
 905                   struct rte_eth_xstat *xstats,
 906                   unsigned int n)
 907 {
 908         unsigned int i, t, count = 0;
 909         const unsigned int nstats = hn_dev_xstats_count(dev);
 910         const char *stats;
 911         int ret;
 912
 913         PMD_INIT_FUNC_TRACE();
 914
 915         if (n < nstats)
 916                 return nstats;
 917
 918         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 919                 const struct hn_tx_queue *txq = dev->data->tx_queues[i];
 920
 921                 if (!txq)
 922                         continue;
 923
 924                 stats = (const char *)&txq->stats;
 925                 for (t = 0; t < RTE_DIM(hn_stat_strings); t++, count++) {
 926                         xstats[count].id = count;
 927                         xstats[count].value = *(const uint64_t *)
 928                                 (stats + hn_stat_strings[t].offset);
 929                 }
 930         }
 931
 932         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 933                 const struct hn_rx_queue *rxq = dev->data->rx_queues[i];
 934
 935                 if (!rxq)
 936                         continue;
 937
 938                 stats = (const char *)&rxq->stats;
 939                 for (t = 0; t < RTE_DIM(hn_stat_strings); t++, count++) {
 940                         xstats[count].id = count;
 941                         xstats[count].value = *(const uint64_t *)
 942                                 (stats + hn_stat_strings[t].offset);
 943                 }
 944         }
 945
 946         ret = hn_vf_xstats_get(dev, xstats, count, n);
 947         if (ret < 0)
 948                 return ret;
 949
 950         return count + ret;
 951 }
 952
 953 static int
 954 hn_dev_start(struct rte_eth_dev *dev)
 955 {
 956         struct hn_data *hv = dev->data->dev_private;
 957         int error;
 958
 959         PMD_INIT_FUNC_TRACE();
 960
 961         /* Register to monitor hot plug events */
 962         error = rte_dev_event_callback_register(NULL, netvsc_hotadd_callback,
 963                                                 hv);
 964         if (error) {
 965                 PMD_DRV_LOG(ERR, "failed to register device event callback");
 966                 return error;
 967         }
 968
 969         error = hn_rndis_set_rxfilter(hv,
 970                                       NDIS_PACKET_TYPE_BROADCAST |
 971                                       NDIS_PACKET_TYPE_ALL_MULTICAST |
 972                                       NDIS_PACKET_TYPE_DIRECTED);
 973         if (error)
 974                 return error;
 975
 976         error = hn_vf_start(dev);
 977         if (error)
 978                 hn_rndis_set_rxfilter(hv, 0);
 979
 980         /* Initialize Link state */
 981         if (error == 0)
 982                 hn_dev_link_update(dev, 0);
 983
 984         return error;
 985 }
 986
 987 static int
 988 hn_dev_stop(struct rte_eth_dev *dev)
 989 {
 990         struct hn_data *hv = dev->data->dev_private;
 991
 992         PMD_INIT_FUNC_TRACE();
 993         dev->data->dev_started = 0;
 994
 995         rte_dev_event_callback_unregister(NULL, netvsc_hotadd_callback, hv);
 996         hn_rndis_set_rxfilter(hv, 0);
 997         return hn_vf_stop(dev);
 998 }
 999
1000 static int
1001 hn_dev_close(struct rte_eth_dev *dev)
1002 {
1003         int ret;
1004         struct hn_data *hv = dev->data->dev_private;
1005
1006         PMD_INIT_FUNC_TRACE();
1007         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1008                 return 0;
1009
1010         rte_eal_alarm_cancel(netvsc_hotplug_retry, &hv->devargs);
1011
1012         ret = hn_vf_close(dev);
1013         hn_dev_free_queues(dev);
1014
1015         return ret;
1016 }
1017
1018 static const struct eth_dev_ops hn_eth_dev_ops = {
1019         .dev_configure          = hn_dev_configure,
1020         .dev_start              = hn_dev_start,
1021         .dev_stop               = hn_dev_stop,
1022         .dev_close              = hn_dev_close,
1023         .dev_infos_get          = hn_dev_info_get,
1024         .txq_info_get           = hn_dev_tx_queue_info,
1025         .rxq_info_get           = hn_dev_rx_queue_info,
1026         .dev_supported_ptypes_get = hn_vf_supported_ptypes,
1027         .promiscuous_enable     = hn_dev_promiscuous_enable,
1028         .promiscuous_disable    = hn_dev_promiscuous_disable,
1029         .allmulticast_enable    = hn_dev_allmulticast_enable,
1030         .allmulticast_disable   = hn_dev_allmulticast_disable,
1031         .set_mc_addr_list       = hn_dev_mc_addr_list,
1032         .reta_update            = hn_rss_reta_update,
1033         .reta_query             = hn_rss_reta_query,
1034         .rss_hash_update        = hn_rss_hash_update,
1035         .rss_hash_conf_get      = hn_rss_hash_conf_get,
1036         .tx_queue_setup         = hn_dev_tx_queue_setup,
1037         .tx_queue_release       = hn_dev_tx_queue_release,
1038         .tx_done_cleanup        = hn_dev_tx_done_cleanup,
1039         .rx_queue_setup         = hn_dev_rx_queue_setup,
1040         .rx_queue_release       = hn_dev_rx_queue_release,
1041         .link_update            = hn_dev_link_update,
1042         .stats_get              = hn_dev_stats_get,
1043         .stats_reset            = hn_dev_stats_reset,
1044         .xstats_get             = hn_dev_xstats_get,
1045         .xstats_get_names       = hn_dev_xstats_get_names,
1046         .xstats_reset           = hn_dev_xstats_reset,
1047 };
1048
1049 /*
1050  * Setup connection between PMD and kernel.
1051  */
1052 static int
1053 hn_attach(struct hn_data *hv, unsigned int mtu)
1054 {
1055         int error;
1056
1057         /* Attach NVS */
1058         error = hn_nvs_attach(hv, mtu);
1059         if (error)
1060                 goto failed_nvs;
1061
1062         /* Attach RNDIS */
1063         error = hn_rndis_attach(hv);
1064         if (error)
1065                 goto failed_rndis;
1066
1067         /*
1068          * NOTE:
1069          * Under certain conditions on certain versions of Hyper-V,
1070          * the RNDIS rxfilter is _not_ zero on the hypervisor side
1071          * after the successful RNDIS initialization.
1072          */
1073         hn_rndis_set_rxfilter(hv, NDIS_PACKET_TYPE_NONE);
1074         return 0;
1075 failed_rndis:
1076         hn_nvs_detach(hv);
1077 failed_nvs:
1078         return error;
1079 }
1080
1081 static void
1082 hn_detach(struct hn_data *hv)
1083 {
1084         hn_nvs_detach(hv);
1085         hn_rndis_detach(hv);
1086 }
1087
1088 static int
1089 eth_hn_dev_init(struct rte_eth_dev *eth_dev)
1090 {
1091         struct hn_data *hv = eth_dev->data->dev_private;
1092         struct rte_device *device = eth_dev->device;
1093         struct rte_vmbus_device *vmbus;
1094         unsigned int rxr_cnt;
1095         int err, max_chan;
1096
1097         PMD_INIT_FUNC_TRACE();
1098
1099         vmbus = container_of(device, struct rte_vmbus_device, device);
1100         eth_dev->dev_ops = &hn_eth_dev_ops;
1101         eth_dev->rx_queue_count = hn_dev_rx_queue_count;
1102         eth_dev->rx_descriptor_status = hn_dev_rx_queue_status;
1103         eth_dev->tx_descriptor_status = hn_dev_tx_descriptor_status;
1104         eth_dev->tx_pkt_burst = &hn_xmit_pkts;
1105         eth_dev->rx_pkt_burst = &hn_recv_pkts;
1106
1107         /*
1108          * for secondary processes, we don't initialize any further as primary
1109          * has already done this work.
1110          */
1111         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1112                 return 0;
1113
1114         eth_dev->data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
1115
1116         /* Since Hyper-V only supports one MAC address */
1117         eth_dev->data->mac_addrs = rte_calloc("hv_mac", HN_MAX_MAC_ADDRS,
1118                                               sizeof(struct rte_ether_addr), 0);
1119         if (eth_dev->data->mac_addrs == NULL) {
1120                 PMD_INIT_LOG(ERR,
1121                              "Failed to allocate memory store MAC addresses");
1122                 return -ENOMEM;
1123         }
1124
1125         hv->vmbus = vmbus;
1126         hv->rxbuf_res = &vmbus->resource[HV_RECV_BUF_MAP];
1127         hv->chim_res  = &vmbus->resource[HV_SEND_BUF_MAP];
1128         hv->port_id = eth_dev->data->port_id;
1129         hv->latency = HN_CHAN_LATENCY_NS;
1130         hv->rx_copybreak = HN_RXCOPY_THRESHOLD;
1131         hv->tx_copybreak = HN_TXCOPY_THRESHOLD;
1132         hv->rx_extmbuf_enable = HN_RX_EXTMBUF_ENABLE;
1133         hv->max_queues = 1;
1134
1135         rte_rwlock_init(&hv->vf_lock);
1136         hv->vf_ctx.vf_vsc_switched = false;
1137         hv->vf_ctx.vf_vsp_reported = false;
1138         hv->vf_ctx.vf_attached = false;
1139         hv->vf_ctx.vf_state = vf_unknown;
1140
1141         err = hn_parse_args(eth_dev);
1142         if (err)
1143                 return err;
1144
1145         strlcpy(hv->owner.name, eth_dev->device->name,
1146                 RTE_ETH_MAX_OWNER_NAME_LEN);
1147         err = rte_eth_dev_owner_new(&hv->owner.id);
1148         if (err) {
1149                 PMD_INIT_LOG(ERR, "Can not get owner id");
1150                 return err;
1151         }
1152
1153         /* Initialize primary channel input for control operations */
1154         err = rte_vmbus_chan_open(vmbus, &hv->channels[0]);
1155         if (err)
1156                 return err;
1157
1158         rte_vmbus_set_latency(hv->vmbus, hv->channels[0], hv->latency);
1159
1160         hv->primary = hn_rx_queue_alloc(hv, 0,
1161                                         eth_dev->device->numa_node);
1162
1163         if (!hv->primary)
1164                 return -ENOMEM;
1165
1166         err = hn_attach(hv, RTE_ETHER_MTU);
1167         if  (err)
1168                 goto failed;
1169
1170         err = hn_chim_init(eth_dev);
1171         if (err)
1172                 goto failed;
1173
1174         err = hn_rndis_get_eaddr(hv, eth_dev->data->mac_addrs->addr_bytes);
1175         if (err)
1176                 goto failed;
1177
1178         /* Multi queue requires later versions of windows server */
1179         if (hv->nvs_ver < NVS_VERSION_5)
1180                 return 0;
1181
1182         max_chan = rte_vmbus_max_channels(vmbus);
1183         PMD_INIT_LOG(DEBUG, "VMBus max channels %d", max_chan);
1184         if (max_chan <= 0)
1185                 goto failed;
1186
1187         if (hn_rndis_query_rsscaps(hv, &rxr_cnt) != 0)
1188                 rxr_cnt = 1;
1189
1190         hv->max_queues = RTE_MIN(rxr_cnt, (unsigned int)max_chan);
1191
1192         /* If VF was reported but not added, do it now */
1193         if (hv->vf_ctx.vf_vsp_reported && !hv->vf_ctx.vf_vsc_switched) {
1194                 PMD_INIT_LOG(DEBUG, "Adding VF device");
1195
1196                 err = hn_vf_add(eth_dev, hv);
1197         }
1198
1199         return 0;
1200
1201 failed:
1202         PMD_INIT_LOG(NOTICE, "device init failed");
1203
1204         hn_chim_uninit(eth_dev);
1205         hn_detach(hv);
1206         return err;
1207 }
1208
1209 static int
1210 eth_hn_dev_uninit(struct rte_eth_dev *eth_dev)
1211 {
1212         struct hn_data *hv = eth_dev->data->dev_private;
1213         int ret, ret_stop;
1214
1215         PMD_INIT_FUNC_TRACE();
1216
1217         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
1218                 return 0;
1219
1220         ret_stop = hn_dev_stop(eth_dev);
1221         hn_dev_close(eth_dev);
1222
1223         hn_detach(hv);
1224         hn_chim_uninit(eth_dev);
1225         rte_vmbus_chan_close(hv->primary->chan);
1226         rte_free(hv->primary);
1227         ret = rte_eth_dev_owner_delete(hv->owner.id);
1228         if (ret != 0)
1229                 return ret;
1230
1231         return ret_stop;
1232 }
1233
1234 static int eth_hn_probe(struct rte_vmbus_driver *drv __rte_unused,
1235                         struct rte_vmbus_device *dev)
1236 {
1237         struct rte_eth_dev *eth_dev;
1238         int ret;
1239
1240         PMD_INIT_FUNC_TRACE();
1241
1242         ret = rte_dev_event_monitor_start();
1243         if (ret) {
1244                 PMD_DRV_LOG(ERR, "Failed to start device event monitoring");
1245                 return ret;
1246         }
1247
1248         eth_dev = eth_dev_vmbus_allocate(dev, sizeof(struct hn_data));
1249         if (!eth_dev)
1250                 return -ENOMEM;
1251
1252         ret = eth_hn_dev_init(eth_dev);
1253         if (ret) {
1254                 eth_dev_vmbus_release(eth_dev);
1255                 rte_dev_event_monitor_stop();
1256         } else {
1257                 rte_eth_dev_probing_finish(eth_dev);
1258         }
1259
1260         return ret;
1261 }
1262
1263 static int eth_hn_remove(struct rte_vmbus_device *dev)
1264 {
1265         struct rte_eth_dev *eth_dev;
1266         int ret;
1267
1268         PMD_INIT_FUNC_TRACE();
1269
1270         eth_dev = rte_eth_dev_allocated(dev->device.name);
1271         if (!eth_dev)
1272                 return 0; /* port already released */
1273
1274         ret = eth_hn_dev_uninit(eth_dev);
1275         if (ret)
1276                 return ret;
1277
1278         eth_dev_vmbus_release(eth_dev);
1279         rte_dev_event_monitor_stop();
1280         return 0;
1281 }
1282
1283 /* Network device GUID */
1284 static const rte_uuid_t hn_net_ids[] = {
1285         /*  f8615163-df3e-46c5-913f-f2d2f965ed0e */
1286         RTE_UUID_INIT(0xf8615163, 0xdf3e, 0x46c5, 0x913f, 0xf2d2f965ed0eULL),
1287         { 0 }
1288 };
1289
1290 static struct rte_vmbus_driver rte_netvsc_pmd = {
1291         .id_table = hn_net_ids,
1292         .probe = eth_hn_probe,
1293         .remove = eth_hn_remove,
1294 };
1295
1296 RTE_PMD_REGISTER_VMBUS(net_netvsc, rte_netvsc_pmd);
1297 RTE_PMD_REGISTER_KMOD_DEP(net_netvsc, "* uio_hv_generic");
1298 RTE_LOG_REGISTER(hn_logtype_init, pmd.net.netvsc.init, NOTICE);
1299 RTE_LOG_REGISTER(hn_logtype_driver, pmd.net.netvsc.driver, NOTICE);
1300 RTE_PMD_REGISTER_PARAM_STRING(net_netvsc,
1301                               NETVSC_ARG_LATENCY "=<uint32> "
1302                               NETVSC_ARG_RXBREAK "=<uint32> "
1303                               NETVSC_ARG_TXBREAK "=<uint32> "
1304                               NETVSC_ARG_RX_EXTMBUF_ENABLE "=<0|1>");