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
  13 #include <rte_ethdev.h>
  14 #include <rte_memcpy.h>
  15 #include <rte_string_fns.h>
  16 #include <rte_memzone.h>
  17 #include <rte_devargs.h>
  18 #include <rte_malloc.h>
  19 #include <rte_kvargs.h>
  20 #include <rte_atomic.h>
  21 #include <rte_branch_prediction.h>
  22 #include <rte_ether.h>
  23 #include <rte_ethdev_driver.h>
  24 #include <rte_cycles.h>
  25 #include <rte_errno.h>
  26 #include <rte_memory.h>
  27 #include <rte_eal.h>
  28 #include <rte_dev.h>
  29 #include <rte_bus_vmbus.h>
  30
  31 #include "hn_logs.h"
  32 #include "hn_var.h"
  33 #include "hn_rndis.h"
  34 #include "hn_nvs.h"
  35 #include "ndis.h"
  36
  37 #define HN_TX_OFFLOAD_CAPS (DEV_TX_OFFLOAD_IPV4_CKSUM | \
  38                             DEV_TX_OFFLOAD_TCP_CKSUM  | \
  39                             DEV_TX_OFFLOAD_UDP_CKSUM  | \
  40                             DEV_TX_OFFLOAD_TCP_TSO    | \
  41                             DEV_TX_OFFLOAD_MULTI_SEGS | \
  42                             DEV_TX_OFFLOAD_VLAN_INSERT)
  43
  44 #define HN_RX_OFFLOAD_CAPS (DEV_RX_OFFLOAD_CHECKSUM | \
  45                             DEV_RX_OFFLOAD_VLAN_STRIP)
  46
  47 int hn_logtype_init;
  48 int hn_logtype_driver;
  49
  50 struct hn_xstats_name_off {
  51         char name[RTE_ETH_XSTATS_NAME_SIZE];
  52         unsigned int offset;
  53 };
  54
  55 static const struct hn_xstats_name_off hn_stat_strings[] = {
  56         { "good_packets",           offsetof(struct hn_stats, packets) },
  57         { "good_bytes",             offsetof(struct hn_stats, bytes) },
  58         { "errors",                 offsetof(struct hn_stats, errors) },
  59         { "allocation_failed",      offsetof(struct hn_stats, nomemory) },
  60         { "multicast_packets",      offsetof(struct hn_stats, multicast) },
  61         { "broadcast_packets",      offsetof(struct hn_stats, broadcast) },
  62         { "undersize_packets",      offsetof(struct hn_stats, size_bins[0]) },
  63         { "size_64_packets",        offsetof(struct hn_stats, size_bins[1]) },
  64         { "size_65_127_packets",    offsetof(struct hn_stats, size_bins[2]) },
  65         { "size_128_255_packets",   offsetof(struct hn_stats, size_bins[3]) },
  66         { "size_256_511_packets",   offsetof(struct hn_stats, size_bins[4]) },
  67         { "size_512_1023_packets",  offsetof(struct hn_stats, size_bins[5]) },
  68         { "size_1024_1518_packets", offsetof(struct hn_stats, size_bins[6]) },
  69         { "size_1519_max_packets",  offsetof(struct hn_stats, size_bins[7]) },
  70 };
  71
  72 static struct rte_eth_dev *
  73 eth_dev_vmbus_allocate(struct rte_vmbus_device *dev, size_t private_data_size)
  74 {
  75         struct rte_eth_dev *eth_dev;
  76         const char *name;
  77
  78         if (!dev)
  79                 return NULL;
  80
  81         name = dev->device.name;
  82
  83         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
  84                 eth_dev = rte_eth_dev_allocate(name);
  85                 if (!eth_dev) {
  86                         PMD_DRV_LOG(NOTICE, "can not allocate rte ethdev");
  87                         return NULL;
  88                 }
  89
  90                 if (private_data_size) {
  91                         eth_dev->data->dev_private =
  92                                 rte_zmalloc_socket(name, private_data_size,
  93                                                      RTE_CACHE_LINE_SIZE, dev->device.numa_node);
  94                         if (!eth_dev->data->dev_private) {
  95                                 PMD_DRV_LOG(NOTICE, "can not allocate driver data");
  96                                 rte_eth_dev_release_port(eth_dev);
  97                                 return NULL;
  98                         }
  99                 }
 100         } else {
 101                 eth_dev = rte_eth_dev_attach_secondary(name);
 102                 if (!eth_dev) {
 103                         PMD_DRV_LOG(NOTICE, "can not attach secondary");
 104                         return NULL;
 105                 }
 106         }
 107
 108         eth_dev->device = &dev->device;
 109         eth_dev->intr_handle = &dev->intr_handle;
 110
 111         return eth_dev;
 112 }
 113
 114 static void
 115 eth_dev_vmbus_release(struct rte_eth_dev *eth_dev)
 116 {
 117         /* free ether device */
 118         rte_eth_dev_release_port(eth_dev);
 119
 120         if (rte_eal_process_type() == RTE_PROC_PRIMARY)
 121                 rte_free(eth_dev->data->dev_private);
 122
 123         eth_dev->data->dev_private = NULL;
 124
 125         /*
 126          * Secondary process will check the name to attach.
 127          * Clear this field to avoid attaching a released ports.
 128          */
 129         eth_dev->data->name[0] = '\0';
 130
 131         eth_dev->device = NULL;
 132         eth_dev->intr_handle = NULL;
 133 }
 134
 135 /* handle "latency=X" from devargs */
 136 static int hn_set_latency(const char *key, const char *value, void *opaque)
 137 {
 138         struct hn_data *hv = opaque;
 139         char *endp = NULL;
 140         unsigned long lat;
 141
 142         errno = 0;
 143         lat = strtoul(value, &endp, 0);
 144
 145         if (*value == '\0' || *endp != '\0') {
 146                 PMD_DRV_LOG(ERR, "invalid parameter %s=%s", key, value);
 147                 return -EINVAL;
 148         }
 149
 150         PMD_DRV_LOG(DEBUG, "set latency %lu usec", lat);
 151
 152         hv->latency = lat * 1000;       /* usec to nsec */
 153         return 0;
 154 }
 155
 156 /* Parse device arguments */
 157 static int hn_parse_args(const struct rte_eth_dev *dev)
 158 {
 159         struct hn_data *hv = dev->data->dev_private;
 160         struct rte_devargs *devargs = dev->device->devargs;
 161         static const char * const valid_keys[] = {
 162                 "latency",
 163                 NULL
 164         };
 165         struct rte_kvargs *kvlist;
 166
 167         if (!devargs)
 168                 return 0;
 169
 170         PMD_INIT_LOG(DEBUG, "device args %s %s",
 171                      devargs->name, devargs->args);
 172
 173         kvlist = rte_kvargs_parse(devargs->args, valid_keys);
 174         if (!kvlist) {
 175                 PMD_DRV_LOG(NOTICE, "invalid parameters");
 176                 return -EINVAL;
 177         }
 178
 179         rte_kvargs_process(kvlist, "latency", hn_set_latency, hv);
 180         rte_kvargs_free(kvlist);
 181         return 0;
 182 }
 183
 184 /* Update link status.
 185  * Note: the DPDK definition of "wait_to_complete"
 186  *   means block this call until link is up.
 187  *   which is not worth supporting.
 188  */
 189 static int
 190 hn_dev_link_update(struct rte_eth_dev *dev,
 191                    __rte_unused int wait_to_complete)
 192 {
 193         struct hn_data *hv = dev->data->dev_private;
 194         struct rte_eth_link link, old;
 195         int error;
 196
 197         old = dev->data->dev_link;
 198
 199         error = hn_rndis_get_linkstatus(hv);
 200         if (error)
 201                 return error;
 202
 203         hn_rndis_get_linkspeed(hv);
 204
 205         link = (struct rte_eth_link) {
 206                 .link_duplex = ETH_LINK_FULL_DUPLEX,
 207                 .link_autoneg = ETH_LINK_SPEED_FIXED,
 208                 .link_speed = hv->link_speed / 10000,
 209         };
 210
 211         if (hv->link_status == NDIS_MEDIA_STATE_CONNECTED)
 212                 link.link_status = ETH_LINK_UP;
 213         else
 214                 link.link_status = ETH_LINK_DOWN;
 215
 216         if (old.link_status == link.link_status)
 217                 return 0;
 218
 219         PMD_INIT_LOG(DEBUG, "Port %d is %s", dev->data->port_id,
 220                      (link.link_status == ETH_LINK_UP) ? "up" : "down");
 221
 222         return rte_eth_linkstatus_set(dev, &link);
 223 }
 224
 225 static void hn_dev_info_get(struct rte_eth_dev *dev,
 226                             struct rte_eth_dev_info *dev_info)
 227 {
 228         struct hn_data *hv = dev->data->dev_private;
 229
 230         dev_info->speed_capa = ETH_LINK_SPEED_10G;
 231         dev_info->min_rx_bufsize = HN_MIN_RX_BUF_SIZE;
 232         dev_info->max_rx_pktlen  = HN_MAX_XFER_LEN;
 233         dev_info->max_mac_addrs  = 1;
 234
 235         dev_info->hash_key_size = NDIS_HASH_KEYSIZE_TOEPLITZ;
 236         dev_info->flow_type_rss_offloads =
 237                 ETH_RSS_IPV4 | ETH_RSS_IPV6 | ETH_RSS_TCP | ETH_RSS_UDP;
 238
 239         dev_info->max_rx_queues = hv->max_queues;
 240         dev_info->max_tx_queues = hv->max_queues;
 241
 242         hn_rndis_get_offload(hv, dev_info);
 243 }
 244
 245 static void
 246 hn_dev_promiscuous_enable(struct rte_eth_dev *dev)
 247 {
 248         struct hn_data *hv = dev->data->dev_private;
 249
 250         hn_rndis_set_rxfilter(hv, NDIS_PACKET_TYPE_PROMISCUOUS);
 251 }
 252
 253 static void
 254 hn_dev_promiscuous_disable(struct rte_eth_dev *dev)
 255 {
 256         struct hn_data *hv = dev->data->dev_private;
 257         uint32_t filter;
 258
 259         filter = NDIS_PACKET_TYPE_DIRECTED | NDIS_PACKET_TYPE_BROADCAST;
 260         if (dev->data->all_multicast)
 261                 filter |= NDIS_PACKET_TYPE_ALL_MULTICAST;
 262         hn_rndis_set_rxfilter(hv, filter);
 263 }
 264
 265 static void
 266 hn_dev_allmulticast_enable(struct rte_eth_dev *dev)
 267 {
 268         struct hn_data *hv = dev->data->dev_private;
 269
 270         hn_rndis_set_rxfilter(hv, NDIS_PACKET_TYPE_DIRECTED |
 271                               NDIS_PACKET_TYPE_ALL_MULTICAST |
 272                         NDIS_PACKET_TYPE_BROADCAST);
 273 }
 274
 275 static void
 276 hn_dev_allmulticast_disable(struct rte_eth_dev *dev)
 277 {
 278         struct hn_data *hv = dev->data->dev_private;
 279
 280         hn_rndis_set_rxfilter(hv, NDIS_PACKET_TYPE_DIRECTED |
 281                              NDIS_PACKET_TYPE_BROADCAST);
 282 }
 283
 284 /* Setup shared rx/tx queue data */
 285 static int hn_subchan_configure(struct hn_data *hv,
 286                                 uint32_t subchan)
 287 {
 288         struct vmbus_channel *primary = hn_primary_chan(hv);
 289         int err;
 290         unsigned int retry = 0;
 291
 292         PMD_DRV_LOG(DEBUG,
 293                     "open %u subchannels", subchan);
 294
 295         /* Send create sub channels command */
 296         err = hn_nvs_alloc_subchans(hv, &subchan);
 297         if (err)
 298                 return  err;
 299
 300         while (subchan > 0) {
 301                 struct vmbus_channel *new_sc;
 302                 uint16_t chn_index;
 303
 304                 err = rte_vmbus_subchan_open(primary, &new_sc);
 305                 if (err == -ENOENT && ++retry < 1000) {
 306                         /* This can happen if not ready yet */
 307                         rte_delay_ms(10);
 308                         continue;
 309                 }
 310
 311                 if (err) {
 312                         PMD_DRV_LOG(ERR,
 313                                     "open subchannel failed: %d", err);
 314                         return err;
 315                 }
 316
 317                 rte_vmbus_set_latency(hv->vmbus, new_sc, hv->latency);
 318
 319                 retry = 0;
 320                 chn_index = rte_vmbus_sub_channel_index(new_sc);
 321                 if (chn_index == 0 || chn_index > hv->max_queues) {
 322                         PMD_DRV_LOG(ERR,
 323                                     "Invalid subchannel offermsg channel %u",
 324                                     chn_index);
 325                         return -EIO;
 326                 }
 327
 328                 PMD_DRV_LOG(DEBUG, "new sub channel %u", chn_index);
 329                 hv->channels[chn_index] = new_sc;
 330                 --subchan;
 331         }
 332
 333         return err;
 334 }
 335
 336 static int hn_dev_configure(struct rte_eth_dev *dev)
 337 {
 338         const struct rte_eth_conf *dev_conf = &dev->data->dev_conf;
 339         const struct rte_eth_rxmode *rxmode = &dev_conf->rxmode;
 340         const struct rte_eth_txmode *txmode = &dev_conf->txmode;
 341
 342         const struct rte_eth_rss_conf *rss_conf =
 343                 &dev_conf->rx_adv_conf.rss_conf;
 344         struct hn_data *hv = dev->data->dev_private;
 345         uint64_t unsupported;
 346         int err, subchan;
 347
 348         PMD_INIT_FUNC_TRACE();
 349
 350         unsupported = txmode->offloads & ~HN_TX_OFFLOAD_CAPS;
 351         if (unsupported) {
 352                 PMD_DRV_LOG(NOTICE,
 353                             "unsupported TX offload: %#" PRIx64,
 354                             unsupported);
 355                 return -EINVAL;
 356         }
 357
 358         unsupported = rxmode->offloads & ~HN_RX_OFFLOAD_CAPS;
 359         if (unsupported) {
 360                 PMD_DRV_LOG(NOTICE,
 361                             "unsupported RX offload: %#" PRIx64,
 362                             rxmode->offloads);
 363                 return -EINVAL;
 364         }
 365
 366         err = hn_rndis_conf_offload(hv, txmode->offloads,
 367                                     rxmode->offloads);
 368         if (err) {
 369                 PMD_DRV_LOG(NOTICE,
 370                             "offload configure failed");
 371                 return err;
 372         }
 373
 374         hv->num_queues = RTE_MAX(dev->data->nb_rx_queues,
 375                                  dev->data->nb_tx_queues);
 376         subchan = hv->num_queues - 1;
 377         if (subchan > 0) {
 378                 err = hn_subchan_configure(hv, subchan);
 379                 if (err) {
 380                         PMD_DRV_LOG(NOTICE,
 381                                     "subchannel configuration failed");
 382                         return err;
 383                 }
 384
 385                 err = hn_rndis_conf_rss(hv, rss_conf);
 386                 if (err) {
 387                         PMD_DRV_LOG(NOTICE,
 388                                     "rss configuration failed");
 389                         return err;
 390                 }
 391         }
 392
 393         return 0;
 394 }
 395
 396 static int hn_dev_stats_get(struct rte_eth_dev *dev,
 397                             struct rte_eth_stats *stats)
 398 {
 399         unsigned int i;
 400
 401         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 402                 const struct hn_tx_queue *txq = dev->data->tx_queues[i];
 403
 404                 if (!txq)
 405                         continue;
 406
 407                 stats->opackets += txq->stats.packets;
 408                 stats->obytes += txq->stats.bytes;
 409                 stats->oerrors += txq->stats.errors + txq->stats.nomemory;
 410
 411                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 412                         stats->q_opackets[i] = txq->stats.packets;
 413                         stats->q_obytes[i] = txq->stats.bytes;
 414                 }
 415         }
 416
 417         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 418                 const struct hn_rx_queue *rxq = dev->data->rx_queues[i];
 419
 420                 if (!rxq)
 421                         continue;
 422
 423                 stats->ipackets += rxq->stats.packets;
 424                 stats->ibytes += rxq->stats.bytes;
 425                 stats->ierrors += rxq->stats.errors;
 426                 stats->imissed += rxq->ring_full;
 427
 428                 if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
 429                         stats->q_ipackets[i] = rxq->stats.packets;
 430                         stats->q_ibytes[i] = rxq->stats.bytes;
 431                 }
 432         }
 433
 434         stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
 435         return 0;
 436 }
 437
 438 static void
 439 hn_dev_stats_reset(struct rte_eth_dev *dev)
 440 {
 441         unsigned int i;
 442
 443         PMD_INIT_FUNC_TRACE();
 444
 445         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 446                 struct hn_tx_queue *txq = dev->data->tx_queues[i];
 447
 448                 if (!txq)
 449                         continue;
 450                 memset(&txq->stats, 0, sizeof(struct hn_stats));
 451         }
 452
 453         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 454                 struct hn_rx_queue *rxq = dev->data->rx_queues[i];
 455
 456                 if (!rxq)
 457                         continue;
 458
 459                 memset(&rxq->stats, 0, sizeof(struct hn_stats));
 460                 rxq->ring_full = 0;
 461         }
 462 }
 463
 464 static int
 465 hn_dev_xstats_get_names(struct rte_eth_dev *dev,
 466                         struct rte_eth_xstat_name *xstats_names,
 467                         __rte_unused unsigned int limit)
 468 {
 469         unsigned int i, t, count = 0;
 470
 471         PMD_INIT_FUNC_TRACE();
 472
 473         if (!xstats_names)
 474                 return dev->data->nb_tx_queues * RTE_DIM(hn_stat_strings)
 475                         + dev->data->nb_rx_queues * RTE_DIM(hn_stat_strings);
 476
 477         /* Note: limit checked in rte_eth_xstats_names() */
 478         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 479                 const struct hn_tx_queue *txq = dev->data->tx_queues[i];
 480
 481                 if (!txq)
 482                         continue;
 483
 484                 for (t = 0; t < RTE_DIM(hn_stat_strings); t++)
 485                         snprintf(xstats_names[count++].name,
 486                                  RTE_ETH_XSTATS_NAME_SIZE,
 487                                  "tx_q%u_%s", i, hn_stat_strings[t].name);
 488         }
 489
 490         for (i = 0; i < dev->data->nb_rx_queues; i++)  {
 491                 const struct hn_rx_queue *rxq = dev->data->rx_queues[i];
 492
 493                 if (!rxq)
 494                         continue;
 495
 496                 for (t = 0; t < RTE_DIM(hn_stat_strings); t++)
 497                         snprintf(xstats_names[count++].name,
 498                                  RTE_ETH_XSTATS_NAME_SIZE,
 499                                  "rx_q%u_%s", i,
 500                                  hn_stat_strings[t].name);
 501         }
 502
 503         return count;
 504 }
 505
 506 static int
 507 hn_dev_xstats_get(struct rte_eth_dev *dev,
 508                   struct rte_eth_xstat *xstats,
 509                   unsigned int n)
 510 {
 511         unsigned int i, t, count = 0;
 512
 513         const unsigned int nstats =
 514                 dev->data->nb_tx_queues * RTE_DIM(hn_stat_strings)
 515                 + dev->data->nb_rx_queues * RTE_DIM(hn_stat_strings);
 516         const char *stats;
 517
 518         PMD_INIT_FUNC_TRACE();
 519
 520         if (n < nstats)
 521                 return nstats;
 522
 523         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 524                 const struct hn_tx_queue *txq = dev->data->tx_queues[i];
 525
 526                 if (!txq)
 527                         continue;
 528
 529                 stats = (const char *)&txq->stats;
 530                 for (t = 0; t < RTE_DIM(hn_stat_strings); t++)
 531                         xstats[count++].value = *(const uint64_t *)
 532                                 (stats + hn_stat_strings[t].offset);
 533         }
 534
 535         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 536                 const struct hn_rx_queue *rxq = dev->data->rx_queues[i];
 537
 538                 if (!rxq)
 539                         continue;
 540
 541                 stats = (const char *)&rxq->stats;
 542                 for (t = 0; t < RTE_DIM(hn_stat_strings); t++)
 543                         xstats[count++].value = *(const uint64_t *)
 544                                 (stats + hn_stat_strings[t].offset);
 545         }
 546
 547         return count;
 548 }
 549
 550 static int
 551 hn_dev_start(struct rte_eth_dev *dev)
 552 {
 553         struct hn_data *hv = dev->data->dev_private;
 554
 555         PMD_INIT_FUNC_TRACE();
 556
 557         /* check if lsc interrupt feature is enabled */
 558         if (dev->data->dev_conf.intr_conf.lsc) {
 559                 PMD_DRV_LOG(ERR, "link status not supported yet");
 560                 return -ENOTSUP;
 561         }
 562
 563         return hn_rndis_set_rxfilter(hv,
 564                                      NDIS_PACKET_TYPE_BROADCAST |
 565                                      NDIS_PACKET_TYPE_ALL_MULTICAST |
 566                                      NDIS_PACKET_TYPE_DIRECTED);
 567 }
 568
 569 static void
 570 hn_dev_stop(struct rte_eth_dev *dev)
 571 {
 572         struct hn_data *hv = dev->data->dev_private;
 573
 574         PMD_INIT_FUNC_TRACE();
 575
 576         hn_rndis_set_rxfilter(hv, 0);
 577 }
 578
 579 static void
 580 hn_dev_close(struct rte_eth_dev *dev __rte_unused)
 581 {
 582         PMD_INIT_LOG(DEBUG, "close");
 583 }
 584
 585 static const struct eth_dev_ops hn_eth_dev_ops = {
 586         .dev_configure          = hn_dev_configure,
 587         .dev_start              = hn_dev_start,
 588         .dev_stop               = hn_dev_stop,
 589         .dev_close              = hn_dev_close,
 590         .dev_infos_get          = hn_dev_info_get,
 591         .txq_info_get           = hn_dev_tx_queue_info,
 592         .rxq_info_get           = hn_dev_rx_queue_info,
 593         .promiscuous_enable     = hn_dev_promiscuous_enable,
 594         .promiscuous_disable    = hn_dev_promiscuous_disable,
 595         .allmulticast_enable    = hn_dev_allmulticast_enable,
 596         .allmulticast_disable   = hn_dev_allmulticast_disable,
 597         .tx_queue_setup         = hn_dev_tx_queue_setup,
 598         .tx_queue_release       = hn_dev_tx_queue_release,
 599         .tx_done_cleanup        = hn_dev_tx_done_cleanup,
 600         .rx_queue_setup         = hn_dev_rx_queue_setup,
 601         .rx_queue_release       = hn_dev_rx_queue_release,
 602         .link_update            = hn_dev_link_update,
 603         .stats_get              = hn_dev_stats_get,
 604         .xstats_get             = hn_dev_xstats_get,
 605         .xstats_get_names       = hn_dev_xstats_get_names,
 606         .stats_reset            = hn_dev_stats_reset,
 607         .xstats_reset           = hn_dev_stats_reset,
 608 };
 609
 610 /*
 611  * Setup connection between PMD and kernel.
 612  */
 613 static int
 614 hn_attach(struct hn_data *hv, unsigned int mtu)
 615 {
 616         int error;
 617
 618         /* Attach NVS */
 619         error = hn_nvs_attach(hv, mtu);
 620         if (error)
 621                 goto failed_nvs;
 622
 623         /* Attach RNDIS */
 624         error = hn_rndis_attach(hv);
 625         if (error)
 626                 goto failed_rndis;
 627
 628         /*
 629          * NOTE:
 630          * Under certain conditions on certain versions of Hyper-V,
 631          * the RNDIS rxfilter is _not_ zero on the hypervisor side
 632          * after the successful RNDIS initialization.
 633          */
 634         hn_rndis_set_rxfilter(hv, NDIS_PACKET_TYPE_NONE);
 635         return 0;
 636 failed_rndis:
 637         hn_nvs_detach(hv);
 638 failed_nvs:
 639         return error;
 640 }
 641
 642 static void
 643 hn_detach(struct hn_data *hv)
 644 {
 645         hn_nvs_detach(hv);
 646         hn_rndis_detach(hv);
 647 }
 648
 649 static int
 650 eth_hn_dev_init(struct rte_eth_dev *eth_dev)
 651 {
 652         struct hn_data *hv = eth_dev->data->dev_private;
 653         struct rte_device *device = eth_dev->device;
 654         struct rte_vmbus_device *vmbus;
 655         unsigned int rxr_cnt;
 656         int err, max_chan;
 657
 658         PMD_INIT_FUNC_TRACE();
 659
 660         vmbus = container_of(device, struct rte_vmbus_device, device);
 661         eth_dev->dev_ops = &hn_eth_dev_ops;
 662         eth_dev->tx_pkt_burst = &hn_xmit_pkts;
 663         eth_dev->rx_pkt_burst = &hn_recv_pkts;
 664
 665         /*
 666          * for secondary processes, we don't initialize any further as primary
 667          * has already done this work.
 668          */
 669         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 670                 return 0;
 671
 672         /* Since Hyper-V only supports one MAC address, just use local data */
 673         eth_dev->data->mac_addrs = &hv->mac_addr;
 674
 675         hv->vmbus = vmbus;
 676         hv->rxbuf_res = &vmbus->resource[HV_RECV_BUF_MAP];
 677         hv->chim_res  = &vmbus->resource[HV_SEND_BUF_MAP];
 678         hv->port_id = eth_dev->data->port_id;
 679         hv->latency = HN_CHAN_LATENCY_NS;
 680
 681         err = hn_parse_args(eth_dev);
 682         if (err)
 683                 return err;
 684
 685         /* Initialize primary channel input for control operations */
 686         err = rte_vmbus_chan_open(vmbus, &hv->channels[0]);
 687         if (err)
 688                 return err;
 689
 690         rte_vmbus_set_latency(hv->vmbus, hv->channels[0], hv->latency);
 691
 692         hv->primary = hn_rx_queue_alloc(hv, 0,
 693                                         eth_dev->device->numa_node);
 694
 695         if (!hv->primary)
 696                 return -ENOMEM;
 697
 698         err = hn_attach(hv, ETHER_MTU);
 699         if  (err)
 700                 goto failed;
 701
 702         err = hn_tx_pool_init(eth_dev);
 703         if (err)
 704                 goto failed;
 705
 706         err = hn_rndis_get_eaddr(hv, hv->mac_addr.addr_bytes);
 707         if (err)
 708                 goto failed;
 709
 710         max_chan = rte_vmbus_max_channels(vmbus);
 711         PMD_INIT_LOG(DEBUG, "VMBus max channels %d", max_chan);
 712         if (max_chan <= 0)
 713                 goto failed;
 714
 715         if (hn_rndis_query_rsscaps(hv, &rxr_cnt) != 0)
 716                 rxr_cnt = 1;
 717
 718         hv->max_queues = RTE_MIN(rxr_cnt, (unsigned int)max_chan);
 719
 720         return 0;
 721
 722 failed:
 723         PMD_INIT_LOG(NOTICE, "device init failed");
 724
 725         hn_detach(hv);
 726         return err;
 727 }
 728
 729 static int
 730 eth_hn_dev_uninit(struct rte_eth_dev *eth_dev)
 731 {
 732         struct hn_data *hv = eth_dev->data->dev_private;
 733
 734         PMD_INIT_FUNC_TRACE();
 735
 736         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 737                 return 0;
 738
 739         hn_dev_stop(eth_dev);
 740         hn_dev_close(eth_dev);
 741
 742         eth_dev->dev_ops = NULL;
 743         eth_dev->tx_pkt_burst = NULL;
 744         eth_dev->rx_pkt_burst = NULL;
 745
 746         hn_detach(hv);
 747         rte_vmbus_chan_close(hv->primary->chan);
 748         rte_free(hv->primary);
 749
 750         eth_dev->data->mac_addrs = NULL;
 751
 752         return 0;
 753 }
 754
 755 static int eth_hn_probe(struct rte_vmbus_driver *drv __rte_unused,
 756                         struct rte_vmbus_device *dev)
 757 {
 758         struct rte_eth_dev *eth_dev;
 759         int ret;
 760
 761         PMD_INIT_FUNC_TRACE();
 762
 763         eth_dev = eth_dev_vmbus_allocate(dev, sizeof(struct hn_data));
 764         if (!eth_dev)
 765                 return -ENOMEM;
 766
 767         ret = eth_hn_dev_init(eth_dev);
 768         if (ret)
 769                 eth_dev_vmbus_release(eth_dev);
 770         else
 771                 rte_eth_dev_probing_finish(eth_dev);
 772
 773         return ret;
 774 }
 775
 776 static int eth_hn_remove(struct rte_vmbus_device *dev)
 777 {
 778         struct rte_eth_dev *eth_dev;
 779         int ret;
 780
 781         PMD_INIT_FUNC_TRACE();
 782
 783         eth_dev = rte_eth_dev_allocated(dev->device.name);
 784         if (!eth_dev)
 785                 return -ENODEV;
 786
 787         ret = eth_hn_dev_uninit(eth_dev);
 788         if (ret)
 789                 return ret;
 790
 791         eth_dev_vmbus_release(eth_dev);
 792         return 0;
 793 }
 794
 795 /* Network device GUID */
 796 static const rte_uuid_t hn_net_ids[] = {
 797         /*  f8615163-df3e-46c5-913f-f2d2f965ed0e */
 798         RTE_UUID_INIT(0xf8615163, 0xdf3e, 0x46c5, 0x913f, 0xf2d2f965ed0eULL),
 799         { 0 }
 800 };
 801
 802 static struct rte_vmbus_driver rte_netvsc_pmd = {
 803         .id_table = hn_net_ids,
 804         .probe = eth_hn_probe,
 805         .remove = eth_hn_remove,
 806 };
 807
 808 RTE_PMD_REGISTER_VMBUS(net_netvsc, rte_netvsc_pmd);
 809 RTE_PMD_REGISTER_KMOD_DEP(net_netvsc, "* uio_hv_generic");
 810
 811 RTE_INIT(hn_init_log);
 812 static void
 813 hn_init_log(void)
 814 {
 815         hn_logtype_init = rte_log_register("pmd.net.netvsc.init");
 816         if (hn_logtype_init >= 0)
 817                 rte_log_set_level(hn_logtype_init, RTE_LOG_NOTICE);
 818         hn_logtype_driver = rte_log_register("pmd.net.netvsc.driver");
 819         if (hn_logtype_driver >= 0)
 820                 rte_log_set_level(hn_logtype_driver, RTE_LOG_NOTICE);
 821 }