drivers/net/vhost/rte_eth_vhost.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright (c) 2016 IGEL Co., Ltd.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of IGEL Co.,Ltd. nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33 #include <unistd.h>
  34 #include <pthread.h>
  35 #include <stdbool.h>
  36 #ifdef RTE_LIBRTE_VHOST_NUMA
  37 #include <numaif.h>
  38 #endif
  39
  40 #include <rte_mbuf.h>
  41 #include <rte_ethdev.h>
  42 #include <rte_malloc.h>
  43 #include <rte_memcpy.h>
  44 #include <rte_vdev.h>
  45 #include <rte_kvargs.h>
  46 #include <rte_virtio_net.h>
  47 #include <rte_spinlock.h>
  48
  49 #include "rte_eth_vhost.h"
  50
  51 #define ETH_VHOST_IFACE_ARG             "iface"
  52 #define ETH_VHOST_QUEUES_ARG            "queues"
  53 #define ETH_VHOST_CLIENT_ARG            "client"
  54 #define ETH_VHOST_DEQUEUE_ZERO_COPY     "dequeue-zero-copy"
  55
  56 static const char *drivername = "VHOST PMD";
  57
  58 static const char *valid_arguments[] = {
  59         ETH_VHOST_IFACE_ARG,
  60         ETH_VHOST_QUEUES_ARG,
  61         ETH_VHOST_CLIENT_ARG,
  62         ETH_VHOST_DEQUEUE_ZERO_COPY,
  63         NULL
  64 };
  65
  66 static struct ether_addr base_eth_addr = {
  67         .addr_bytes = {
  68                 0x56 /* V */,
  69                 0x48 /* H */,
  70                 0x4F /* O */,
  71                 0x53 /* S */,
  72                 0x54 /* T */,
  73                 0x00
  74         }
  75 };
  76
  77 enum vhost_xstats_pkts {
  78         VHOST_UNDERSIZE_PKT = 0,
  79         VHOST_64_PKT,
  80         VHOST_65_TO_127_PKT,
  81         VHOST_128_TO_255_PKT,
  82         VHOST_256_TO_511_PKT,
  83         VHOST_512_TO_1023_PKT,
  84         VHOST_1024_TO_1522_PKT,
  85         VHOST_1523_TO_MAX_PKT,
  86         VHOST_BROADCAST_PKT,
  87         VHOST_MULTICAST_PKT,
  88         VHOST_UNICAST_PKT,
  89         VHOST_ERRORS_PKT,
  90         VHOST_ERRORS_FRAGMENTED,
  91         VHOST_ERRORS_JABBER,
  92         VHOST_UNKNOWN_PROTOCOL,
  93         VHOST_XSTATS_MAX,
  94 };
  95
  96 struct vhost_stats {
  97         uint64_t pkts;
  98         uint64_t bytes;
  99         uint64_t missed_pkts;
 100         uint64_t xstats[VHOST_XSTATS_MAX];
 101 };
 102
 103 struct vhost_queue {
 104         int vid;
 105         rte_atomic32_t allow_queuing;
 106         rte_atomic32_t while_queuing;
 107         struct pmd_internal *internal;
 108         struct rte_mempool *mb_pool;
 109         uint8_t port;
 110         uint16_t virtqueue_id;
 111         struct vhost_stats stats;
 112 };
 113
 114 struct pmd_internal {
 115         char *dev_name;
 116         char *iface_name;
 117         uint16_t max_queues;
 118 };
 119
 120 struct internal_list {
 121         TAILQ_ENTRY(internal_list) next;
 122         struct rte_eth_dev *eth_dev;
 123 };
 124
 125 TAILQ_HEAD(internal_list_head, internal_list);
 126 static struct internal_list_head internal_list =
 127         TAILQ_HEAD_INITIALIZER(internal_list);
 128
 129 static pthread_mutex_t internal_list_lock = PTHREAD_MUTEX_INITIALIZER;
 130
 131 static rte_atomic16_t nb_started_ports;
 132 static pthread_t session_th;
 133
 134 static struct rte_eth_link pmd_link = {
 135                 .link_speed = 10000,
 136                 .link_duplex = ETH_LINK_FULL_DUPLEX,
 137                 .link_status = ETH_LINK_DOWN
 138 };
 139
 140 struct rte_vhost_vring_state {
 141         rte_spinlock_t lock;
 142
 143         bool cur[RTE_MAX_QUEUES_PER_PORT * 2];
 144         bool seen[RTE_MAX_QUEUES_PER_PORT * 2];
 145         unsigned int index;
 146         unsigned int max_vring;
 147 };
 148
 149 static struct rte_vhost_vring_state *vring_states[RTE_MAX_ETHPORTS];
 150
 151 #define VHOST_XSTATS_NAME_SIZE 64
 152
 153 struct vhost_xstats_name_off {
 154         char name[VHOST_XSTATS_NAME_SIZE];
 155         uint64_t offset;
 156 };
 157
 158 /* [rx]_is prepended to the name string here */
 159 static const struct vhost_xstats_name_off vhost_rxport_stat_strings[] = {
 160         {"good_packets",
 161          offsetof(struct vhost_queue, stats.pkts)},
 162         {"total_bytes",
 163          offsetof(struct vhost_queue, stats.bytes)},
 164         {"missed_pkts",
 165          offsetof(struct vhost_queue, stats.missed_pkts)},
 166         {"broadcast_packets",
 167          offsetof(struct vhost_queue, stats.xstats[VHOST_BROADCAST_PKT])},
 168         {"multicast_packets",
 169          offsetof(struct vhost_queue, stats.xstats[VHOST_MULTICAST_PKT])},
 170         {"unicast_packets",
 171          offsetof(struct vhost_queue, stats.xstats[VHOST_UNICAST_PKT])},
 172          {"undersize_packets",
 173          offsetof(struct vhost_queue, stats.xstats[VHOST_UNDERSIZE_PKT])},
 174         {"size_64_packets",
 175          offsetof(struct vhost_queue, stats.xstats[VHOST_64_PKT])},
 176         {"size_65_to_127_packets",
 177          offsetof(struct vhost_queue, stats.xstats[VHOST_65_TO_127_PKT])},
 178         {"size_128_to_255_packets",
 179          offsetof(struct vhost_queue, stats.xstats[VHOST_128_TO_255_PKT])},
 180         {"size_256_to_511_packets",
 181          offsetof(struct vhost_queue, stats.xstats[VHOST_256_TO_511_PKT])},
 182         {"size_512_to_1023_packets",
 183          offsetof(struct vhost_queue, stats.xstats[VHOST_512_TO_1023_PKT])},
 184         {"size_1024_to_1522_packets",
 185          offsetof(struct vhost_queue, stats.xstats[VHOST_1024_TO_1522_PKT])},
 186         {"size_1523_to_max_packets",
 187          offsetof(struct vhost_queue, stats.xstats[VHOST_1523_TO_MAX_PKT])},
 188         {"errors_with_bad_CRC",
 189          offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_PKT])},
 190         {"fragmented_errors",
 191          offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_FRAGMENTED])},
 192         {"jabber_errors",
 193          offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_JABBER])},
 194         {"unknown_protos_packets",
 195          offsetof(struct vhost_queue, stats.xstats[VHOST_UNKNOWN_PROTOCOL])},
 196 };
 197
 198 /* [tx]_ is prepended to the name string here */
 199 static const struct vhost_xstats_name_off vhost_txport_stat_strings[] = {
 200         {"good_packets",
 201          offsetof(struct vhost_queue, stats.pkts)},
 202         {"total_bytes",
 203          offsetof(struct vhost_queue, stats.bytes)},
 204         {"missed_pkts",
 205          offsetof(struct vhost_queue, stats.missed_pkts)},
 206         {"broadcast_packets",
 207          offsetof(struct vhost_queue, stats.xstats[VHOST_BROADCAST_PKT])},
 208         {"multicast_packets",
 209          offsetof(struct vhost_queue, stats.xstats[VHOST_MULTICAST_PKT])},
 210         {"unicast_packets",
 211          offsetof(struct vhost_queue, stats.xstats[VHOST_UNICAST_PKT])},
 212         {"undersize_packets",
 213          offsetof(struct vhost_queue, stats.xstats[VHOST_UNDERSIZE_PKT])},
 214         {"size_64_packets",
 215          offsetof(struct vhost_queue, stats.xstats[VHOST_64_PKT])},
 216         {"size_65_to_127_packets",
 217          offsetof(struct vhost_queue, stats.xstats[VHOST_65_TO_127_PKT])},
 218         {"size_128_to_255_packets",
 219          offsetof(struct vhost_queue, stats.xstats[VHOST_128_TO_255_PKT])},
 220         {"size_256_to_511_packets",
 221          offsetof(struct vhost_queue, stats.xstats[VHOST_256_TO_511_PKT])},
 222         {"size_512_to_1023_packets",
 223          offsetof(struct vhost_queue, stats.xstats[VHOST_512_TO_1023_PKT])},
 224         {"size_1024_to_1522_packets",
 225          offsetof(struct vhost_queue, stats.xstats[VHOST_1024_TO_1522_PKT])},
 226         {"size_1523_to_max_packets",
 227          offsetof(struct vhost_queue, stats.xstats[VHOST_1523_TO_MAX_PKT])},
 228         {"errors_with_bad_CRC",
 229          offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_PKT])},
 230 };
 231
 232 #define VHOST_NB_XSTATS_RXPORT (sizeof(vhost_rxport_stat_strings) / \
 233                                 sizeof(vhost_rxport_stat_strings[0]))
 234
 235 #define VHOST_NB_XSTATS_TXPORT (sizeof(vhost_txport_stat_strings) / \
 236                                 sizeof(vhost_txport_stat_strings[0]))
 237
 238 static void
 239 vhost_dev_xstats_reset(struct rte_eth_dev *dev)
 240 {
 241         struct vhost_queue *vq = NULL;
 242         unsigned int i = 0;
 243
 244         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 245                 vq = dev->data->rx_queues[i];
 246                 if (!vq)
 247                         continue;
 248                 memset(&vq->stats, 0, sizeof(vq->stats));
 249         }
 250         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 251                 vq = dev->data->tx_queues[i];
 252                 if (!vq)
 253                         continue;
 254                 memset(&vq->stats, 0, sizeof(vq->stats));
 255         }
 256 }
 257
 258 static int
 259 vhost_dev_xstats_get_names(struct rte_eth_dev *dev __rte_unused,
 260                            struct rte_eth_xstat_name *xstats_names,
 261                            unsigned int limit __rte_unused)
 262 {
 263         unsigned int t = 0;
 264         int count = 0;
 265         int nstats = VHOST_NB_XSTATS_RXPORT + VHOST_NB_XSTATS_TXPORT;
 266
 267         if (!xstats_names)
 268                 return nstats;
 269         for (t = 0; t < VHOST_NB_XSTATS_RXPORT; t++) {
 270                 snprintf(xstats_names[count].name,
 271                          sizeof(xstats_names[count].name),
 272                          "rx_%s", vhost_rxport_stat_strings[t].name);
 273                 count++;
 274         }
 275         for (t = 0; t < VHOST_NB_XSTATS_TXPORT; t++) {
 276                 snprintf(xstats_names[count].name,
 277                          sizeof(xstats_names[count].name),
 278                          "tx_%s", vhost_txport_stat_strings[t].name);
 279                 count++;
 280         }
 281         return count;
 282 }
 283
 284 static int
 285 vhost_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 286                      unsigned int n)
 287 {
 288         unsigned int i;
 289         unsigned int t;
 290         unsigned int count = 0;
 291         struct vhost_queue *vq = NULL;
 292         unsigned int nxstats = VHOST_NB_XSTATS_RXPORT + VHOST_NB_XSTATS_TXPORT;
 293
 294         if (n < nxstats)
 295                 return nxstats;
 296
 297         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 298                 vq = dev->data->rx_queues[i];
 299                 if (!vq)
 300                         continue;
 301                 vq->stats.xstats[VHOST_UNICAST_PKT] = vq->stats.pkts
 302                                 - (vq->stats.xstats[VHOST_BROADCAST_PKT]
 303                                 + vq->stats.xstats[VHOST_MULTICAST_PKT]);
 304         }
 305         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 306                 vq = dev->data->tx_queues[i];
 307                 if (!vq)
 308                         continue;
 309                 vq->stats.xstats[VHOST_UNICAST_PKT] = vq->stats.pkts
 310                                 + vq->stats.missed_pkts
 311                                 - (vq->stats.xstats[VHOST_BROADCAST_PKT]
 312                                 + vq->stats.xstats[VHOST_MULTICAST_PKT]);
 313         }
 314         for (t = 0; t < VHOST_NB_XSTATS_RXPORT; t++) {
 315                 xstats[count].value = 0;
 316                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 317                         vq = dev->data->rx_queues[i];
 318                         if (!vq)
 319                                 continue;
 320                         xstats[count].value +=
 321                                 *(uint64_t *)(((char *)vq)
 322                                 + vhost_rxport_stat_strings[t].offset);
 323                 }
 324                 xstats[count].id = count;
 325                 count++;
 326         }
 327         for (t = 0; t < VHOST_NB_XSTATS_TXPORT; t++) {
 328                 xstats[count].value = 0;
 329                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 330                         vq = dev->data->tx_queues[i];
 331                         if (!vq)
 332                                 continue;
 333                         xstats[count].value +=
 334                                 *(uint64_t *)(((char *)vq)
 335                                 + vhost_txport_stat_strings[t].offset);
 336                 }
 337                 xstats[count].id = count;
 338                 count++;
 339         }
 340         return count;
 341 }
 342
 343 static inline void
 344 vhost_count_multicast_broadcast(struct vhost_queue *vq,
 345                                 struct rte_mbuf *mbuf)
 346 {
 347         struct ether_addr *ea = NULL;
 348         struct vhost_stats *pstats = &vq->stats;
 349
 350         ea = rte_pktmbuf_mtod(mbuf, struct ether_addr *);
 351         if (is_multicast_ether_addr(ea)) {
 352                 if (is_broadcast_ether_addr(ea))
 353                         pstats->xstats[VHOST_BROADCAST_PKT]++;
 354                 else
 355                         pstats->xstats[VHOST_MULTICAST_PKT]++;
 356         }
 357 }
 358
 359 static void
 360 vhost_update_packet_xstats(struct vhost_queue *vq,
 361                            struct rte_mbuf **bufs,
 362                            uint16_t count)
 363 {
 364         uint32_t pkt_len = 0;
 365         uint64_t i = 0;
 366         uint64_t index;
 367         struct vhost_stats *pstats = &vq->stats;
 368
 369         for (i = 0; i < count ; i++) {
 370                 pkt_len = bufs[i]->pkt_len;
 371                 if (pkt_len == 64) {
 372                         pstats->xstats[VHOST_64_PKT]++;
 373                 } else if (pkt_len > 64 && pkt_len < 1024) {
 374                         index = (sizeof(pkt_len) * 8)
 375                                 - __builtin_clz(pkt_len) - 5;
 376                         pstats->xstats[index]++;
 377                 } else {
 378                         if (pkt_len < 64)
 379                                 pstats->xstats[VHOST_UNDERSIZE_PKT]++;
 380                         else if (pkt_len <= 1522)
 381                                 pstats->xstats[VHOST_1024_TO_1522_PKT]++;
 382                         else if (pkt_len > 1522)
 383                                 pstats->xstats[VHOST_1523_TO_MAX_PKT]++;
 384                 }
 385                 vhost_count_multicast_broadcast(vq, bufs[i]);
 386         }
 387 }
 388
 389 static uint16_t
 390 eth_vhost_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 391 {
 392         struct vhost_queue *r = q;
 393         uint16_t i, nb_rx = 0;
 394
 395         if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
 396                 return 0;
 397
 398         rte_atomic32_set(&r->while_queuing, 1);
 399
 400         if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
 401                 goto out;
 402
 403         /* Dequeue packets from guest TX queue */
 404         nb_rx = rte_vhost_dequeue_burst(r->vid,
 405                         r->virtqueue_id, r->mb_pool, bufs, nb_bufs);
 406
 407         r->stats.pkts += nb_rx;
 408
 409         for (i = 0; likely(i < nb_rx); i++) {
 410                 bufs[i]->port = r->port;
 411                 r->stats.bytes += bufs[i]->pkt_len;
 412         }
 413
 414         vhost_update_packet_xstats(r, bufs, nb_rx);
 415
 416 out:
 417         rte_atomic32_set(&r->while_queuing, 0);
 418
 419         return nb_rx;
 420 }
 421
 422 static uint16_t
 423 eth_vhost_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 424 {
 425         struct vhost_queue *r = q;
 426         uint16_t i, nb_tx = 0;
 427
 428         if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
 429                 return 0;
 430
 431         rte_atomic32_set(&r->while_queuing, 1);
 432
 433         if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
 434                 goto out;
 435
 436         /* Enqueue packets to guest RX queue */
 437         nb_tx = rte_vhost_enqueue_burst(r->vid,
 438                         r->virtqueue_id, bufs, nb_bufs);
 439
 440         r->stats.pkts += nb_tx;
 441         r->stats.missed_pkts += nb_bufs - nb_tx;
 442
 443         for (i = 0; likely(i < nb_tx); i++)
 444                 r->stats.bytes += bufs[i]->pkt_len;
 445
 446         vhost_update_packet_xstats(r, bufs, nb_tx);
 447
 448         /* According to RFC2863 page42 section ifHCOutMulticastPkts and
 449          * ifHCOutBroadcastPkts, the counters "multicast" and "broadcast"
 450          * are increased when packets are not transmitted successfully.
 451          */
 452         for (i = nb_tx; i < nb_bufs; i++)
 453                 vhost_count_multicast_broadcast(r, bufs[i]);
 454
 455         for (i = 0; likely(i < nb_tx); i++)
 456                 rte_pktmbuf_free(bufs[i]);
 457 out:
 458         rte_atomic32_set(&r->while_queuing, 0);
 459
 460         return nb_tx;
 461 }
 462
 463 static int
 464 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 465 {
 466         return 0;
 467 }
 468
 469 static inline struct internal_list *
 470 find_internal_resource(char *ifname)
 471 {
 472         int found = 0;
 473         struct internal_list *list;
 474         struct pmd_internal *internal;
 475
 476         if (ifname == NULL)
 477                 return NULL;
 478
 479         pthread_mutex_lock(&internal_list_lock);
 480
 481         TAILQ_FOREACH(list, &internal_list, next) {
 482                 internal = list->eth_dev->data->dev_private;
 483                 if (!strcmp(internal->iface_name, ifname)) {
 484                         found = 1;
 485                         break;
 486                 }
 487         }
 488
 489         pthread_mutex_unlock(&internal_list_lock);
 490
 491         if (!found)
 492                 return NULL;
 493
 494         return list;
 495 }
 496
 497 static int
 498 new_device(int vid)
 499 {
 500         struct rte_eth_dev *eth_dev;
 501         struct internal_list *list;
 502         struct pmd_internal *internal;
 503         struct vhost_queue *vq;
 504         unsigned i;
 505         char ifname[PATH_MAX];
 506 #ifdef RTE_LIBRTE_VHOST_NUMA
 507         int newnode;
 508 #endif
 509
 510         rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
 511         list = find_internal_resource(ifname);
 512         if (list == NULL) {
 513                 RTE_LOG(INFO, PMD, "Invalid device name: %s\n", ifname);
 514                 return -1;
 515         }
 516
 517         eth_dev = list->eth_dev;
 518         internal = eth_dev->data->dev_private;
 519
 520 #ifdef RTE_LIBRTE_VHOST_NUMA
 521         newnode = rte_vhost_get_numa_node(vid);
 522         if (newnode >= 0)
 523                 eth_dev->data->numa_node = newnode;
 524 #endif
 525
 526         for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
 527                 vq = eth_dev->data->rx_queues[i];
 528                 if (vq == NULL)
 529                         continue;
 530                 vq->vid = vid;
 531                 vq->internal = internal;
 532                 vq->port = eth_dev->data->port_id;
 533         }
 534         for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
 535                 vq = eth_dev->data->tx_queues[i];
 536                 if (vq == NULL)
 537                         continue;
 538                 vq->vid = vid;
 539                 vq->internal = internal;
 540                 vq->port = eth_dev->data->port_id;
 541         }
 542
 543         for (i = 0; i < rte_vhost_get_queue_num(vid) * VIRTIO_QNUM; i++)
 544                 rte_vhost_enable_guest_notification(vid, i, 0);
 545
 546         eth_dev->data->dev_link.link_status = ETH_LINK_UP;
 547
 548         for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
 549                 vq = eth_dev->data->rx_queues[i];
 550                 if (vq == NULL)
 551                         continue;
 552                 rte_atomic32_set(&vq->allow_queuing, 1);
 553         }
 554         for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
 555                 vq = eth_dev->data->tx_queues[i];
 556                 if (vq == NULL)
 557                         continue;
 558                 rte_atomic32_set(&vq->allow_queuing, 1);
 559         }
 560
 561         RTE_LOG(INFO, PMD, "Vhost device %d created\n", vid);
 562
 563         _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 564
 565         return 0;
 566 }
 567
 568 static void
 569 destroy_device(int vid)
 570 {
 571         struct rte_eth_dev *eth_dev;
 572         struct vhost_queue *vq;
 573         struct internal_list *list;
 574         char ifname[PATH_MAX];
 575         unsigned i;
 576         struct rte_vhost_vring_state *state;
 577
 578         rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
 579         list = find_internal_resource(ifname);
 580         if (list == NULL) {
 581                 RTE_LOG(ERR, PMD, "Invalid interface name: %s\n", ifname);
 582                 return;
 583         }
 584         eth_dev = list->eth_dev;
 585
 586         /* Wait until rx/tx_pkt_burst stops accessing vhost device */
 587         for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
 588                 vq = eth_dev->data->rx_queues[i];
 589                 if (vq == NULL)
 590                         continue;
 591                 rte_atomic32_set(&vq->allow_queuing, 0);
 592                 while (rte_atomic32_read(&vq->while_queuing))
 593                         rte_pause();
 594         }
 595         for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
 596                 vq = eth_dev->data->tx_queues[i];
 597                 if (vq == NULL)
 598                         continue;
 599                 rte_atomic32_set(&vq->allow_queuing, 0);
 600                 while (rte_atomic32_read(&vq->while_queuing))
 601                         rte_pause();
 602         }
 603
 604         eth_dev->data->dev_link.link_status = ETH_LINK_DOWN;
 605
 606         for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
 607                 vq = eth_dev->data->rx_queues[i];
 608                 if (vq == NULL)
 609                         continue;
 610                 vq->vid = -1;
 611         }
 612         for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
 613                 vq = eth_dev->data->tx_queues[i];
 614                 if (vq == NULL)
 615                         continue;
 616                 vq->vid = -1;
 617         }
 618
 619         state = vring_states[eth_dev->data->port_id];
 620         rte_spinlock_lock(&state->lock);
 621         for (i = 0; i <= state->max_vring; i++) {
 622                 state->cur[i] = false;
 623                 state->seen[i] = false;
 624         }
 625         state->max_vring = 0;
 626         rte_spinlock_unlock(&state->lock);
 627
 628         RTE_LOG(INFO, PMD, "Vhost device %d destroyed\n", vid);
 629
 630         _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 631 }
 632
 633 static int
 634 vring_state_changed(int vid, uint16_t vring, int enable)
 635 {
 636         struct rte_vhost_vring_state *state;
 637         struct rte_eth_dev *eth_dev;
 638         struct internal_list *list;
 639         char ifname[PATH_MAX];
 640
 641         rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
 642         list = find_internal_resource(ifname);
 643         if (list == NULL) {
 644                 RTE_LOG(ERR, PMD, "Invalid interface name: %s\n", ifname);
 645                 return -1;
 646         }
 647
 648         eth_dev = list->eth_dev;
 649         /* won't be NULL */
 650         state = vring_states[eth_dev->data->port_id];
 651         rte_spinlock_lock(&state->lock);
 652         state->cur[vring] = enable;
 653         state->max_vring = RTE_MAX(vring, state->max_vring);
 654         rte_spinlock_unlock(&state->lock);
 655
 656         RTE_LOG(INFO, PMD, "vring%u is %s\n",
 657                         vring, enable ? "enabled" : "disabled");
 658
 659         _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_QUEUE_STATE, NULL);
 660
 661         return 0;
 662 }
 663
 664 int
 665 rte_eth_vhost_get_queue_event(uint8_t port_id,
 666                 struct rte_eth_vhost_queue_event *event)
 667 {
 668         struct rte_vhost_vring_state *state;
 669         unsigned int i;
 670         int idx;
 671
 672         if (port_id >= RTE_MAX_ETHPORTS) {
 673                 RTE_LOG(ERR, PMD, "Invalid port id\n");
 674                 return -1;
 675         }
 676
 677         state = vring_states[port_id];
 678         if (!state) {
 679                 RTE_LOG(ERR, PMD, "Unused port\n");
 680                 return -1;
 681         }
 682
 683         rte_spinlock_lock(&state->lock);
 684         for (i = 0; i <= state->max_vring; i++) {
 685                 idx = state->index++ % (state->max_vring + 1);
 686
 687                 if (state->cur[idx] != state->seen[idx]) {
 688                         state->seen[idx] = state->cur[idx];
 689                         event->queue_id = idx / 2;
 690                         event->rx = idx & 1;
 691                         event->enable = state->cur[idx];
 692                         rte_spinlock_unlock(&state->lock);
 693                         return 0;
 694                 }
 695         }
 696         rte_spinlock_unlock(&state->lock);
 697
 698         return -1;
 699 }
 700
 701 int
 702 rte_eth_vhost_get_vid_from_port_id(uint8_t port_id)
 703 {
 704         struct internal_list *list;
 705         struct rte_eth_dev *eth_dev;
 706         struct vhost_queue *vq;
 707         int vid = -1;
 708
 709         if (!rte_eth_dev_is_valid_port(port_id))
 710                 return -1;
 711
 712         pthread_mutex_lock(&internal_list_lock);
 713
 714         TAILQ_FOREACH(list, &internal_list, next) {
 715                 eth_dev = list->eth_dev;
 716                 if (eth_dev->data->port_id == port_id) {
 717                         vq = eth_dev->data->rx_queues[0];
 718                         if (vq) {
 719                                 vid = vq->vid;
 720                         }
 721                         break;
 722                 }
 723         }
 724
 725         pthread_mutex_unlock(&internal_list_lock);
 726
 727         return vid;
 728 }
 729
 730 static void *
 731 vhost_driver_session(void *param __rte_unused)
 732 {
 733         static struct virtio_net_device_ops vhost_ops;
 734
 735         /* set vhost arguments */
 736         vhost_ops.new_device = new_device;
 737         vhost_ops.destroy_device = destroy_device;
 738         vhost_ops.vring_state_changed = vring_state_changed;
 739         if (rte_vhost_driver_callback_register(&vhost_ops) < 0)
 740                 RTE_LOG(ERR, PMD, "Can't register callbacks\n");
 741
 742         /* start event handling */
 743         rte_vhost_driver_session_start();
 744
 745         return NULL;
 746 }
 747
 748 static int
 749 vhost_driver_session_start(void)
 750 {
 751         int ret;
 752
 753         ret = pthread_create(&session_th,
 754                         NULL, vhost_driver_session, NULL);
 755         if (ret)
 756                 RTE_LOG(ERR, PMD, "Can't create a thread\n");
 757
 758         return ret;
 759 }
 760
 761 static void
 762 vhost_driver_session_stop(void)
 763 {
 764         int ret;
 765
 766         ret = pthread_cancel(session_th);
 767         if (ret)
 768                 RTE_LOG(ERR, PMD, "Can't cancel the thread\n");
 769
 770         ret = pthread_join(session_th, NULL);
 771         if (ret)
 772                 RTE_LOG(ERR, PMD, "Can't join the thread\n");
 773 }
 774
 775 static int
 776 eth_dev_start(struct rte_eth_dev *dev __rte_unused)
 777 {
 778         return 0;
 779 }
 780
 781 static void
 782 eth_dev_stop(struct rte_eth_dev *dev __rte_unused)
 783 {
 784 }
 785
 786 static void
 787 eth_dev_close(struct rte_eth_dev *dev)
 788 {
 789         struct pmd_internal *internal;
 790         struct internal_list *list;
 791
 792         internal = dev->data->dev_private;
 793         if (!internal)
 794                 return;
 795
 796         rte_vhost_driver_unregister(internal->iface_name);
 797
 798         list = find_internal_resource(internal->iface_name);
 799         if (!list)
 800                 return;
 801
 802         pthread_mutex_lock(&internal_list_lock);
 803         TAILQ_REMOVE(&internal_list, list, next);
 804         pthread_mutex_unlock(&internal_list_lock);
 805         rte_free(list);
 806
 807         free(internal->dev_name);
 808         free(internal->iface_name);
 809         rte_free(internal);
 810 }
 811
 812 static int
 813 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 814                    uint16_t nb_rx_desc __rte_unused,
 815                    unsigned int socket_id,
 816                    const struct rte_eth_rxconf *rx_conf __rte_unused,
 817                    struct rte_mempool *mb_pool)
 818 {
 819         struct vhost_queue *vq;
 820
 821         vq = rte_zmalloc_socket(NULL, sizeof(struct vhost_queue),
 822                         RTE_CACHE_LINE_SIZE, socket_id);
 823         if (vq == NULL) {
 824                 RTE_LOG(ERR, PMD, "Failed to allocate memory for rx queue\n");
 825                 return -ENOMEM;
 826         }
 827
 828         vq->mb_pool = mb_pool;
 829         vq->virtqueue_id = rx_queue_id * VIRTIO_QNUM + VIRTIO_TXQ;
 830         dev->data->rx_queues[rx_queue_id] = vq;
 831
 832         return 0;
 833 }
 834
 835 static int
 836 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 837                    uint16_t nb_tx_desc __rte_unused,
 838                    unsigned int socket_id,
 839                    const struct rte_eth_txconf *tx_conf __rte_unused)
 840 {
 841         struct vhost_queue *vq;
 842
 843         vq = rte_zmalloc_socket(NULL, sizeof(struct vhost_queue),
 844                         RTE_CACHE_LINE_SIZE, socket_id);
 845         if (vq == NULL) {
 846                 RTE_LOG(ERR, PMD, "Failed to allocate memory for tx queue\n");
 847                 return -ENOMEM;
 848         }
 849
 850         vq->virtqueue_id = tx_queue_id * VIRTIO_QNUM + VIRTIO_RXQ;
 851         dev->data->tx_queues[tx_queue_id] = vq;
 852
 853         return 0;
 854 }
 855
 856 static void
 857 eth_dev_info(struct rte_eth_dev *dev,
 858              struct rte_eth_dev_info *dev_info)
 859 {
 860         struct pmd_internal *internal;
 861
 862         internal = dev->data->dev_private;
 863         if (internal == NULL) {
 864                 RTE_LOG(ERR, PMD, "Invalid device specified\n");
 865                 return;
 866         }
 867
 868         dev_info->driver_name = drivername;
 869         dev_info->max_mac_addrs = 1;
 870         dev_info->max_rx_pktlen = (uint32_t)-1;
 871         dev_info->max_rx_queues = internal->max_queues;
 872         dev_info->max_tx_queues = internal->max_queues;
 873         dev_info->min_rx_bufsize = 0;
 874 }
 875
 876 static void
 877 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 878 {
 879         unsigned i;
 880         unsigned long rx_total = 0, tx_total = 0, tx_missed_total = 0;
 881         unsigned long rx_total_bytes = 0, tx_total_bytes = 0;
 882         struct vhost_queue *vq;
 883
 884         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 885                         i < dev->data->nb_rx_queues; i++) {
 886                 if (dev->data->rx_queues[i] == NULL)
 887                         continue;
 888                 vq = dev->data->rx_queues[i];
 889                 stats->q_ipackets[i] = vq->stats.pkts;
 890                 rx_total += stats->q_ipackets[i];
 891
 892                 stats->q_ibytes[i] = vq->stats.bytes;
 893                 rx_total_bytes += stats->q_ibytes[i];
 894         }
 895
 896         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 897                         i < dev->data->nb_tx_queues; i++) {
 898                 if (dev->data->tx_queues[i] == NULL)
 899                         continue;
 900                 vq = dev->data->tx_queues[i];
 901                 stats->q_opackets[i] = vq->stats.pkts;
 902                 tx_missed_total += vq->stats.missed_pkts;
 903                 tx_total += stats->q_opackets[i];
 904
 905                 stats->q_obytes[i] = vq->stats.bytes;
 906                 tx_total_bytes += stats->q_obytes[i];
 907         }
 908
 909         stats->ipackets = rx_total;
 910         stats->opackets = tx_total;
 911         stats->oerrors = tx_missed_total;
 912         stats->ibytes = rx_total_bytes;
 913         stats->obytes = tx_total_bytes;
 914 }
 915
 916 static void
 917 eth_stats_reset(struct rte_eth_dev *dev)
 918 {
 919         struct vhost_queue *vq;
 920         unsigned i;
 921
 922         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 923                 if (dev->data->rx_queues[i] == NULL)
 924                         continue;
 925                 vq = dev->data->rx_queues[i];
 926                 vq->stats.pkts = 0;
 927                 vq->stats.bytes = 0;
 928         }
 929         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 930                 if (dev->data->tx_queues[i] == NULL)
 931                         continue;
 932                 vq = dev->data->tx_queues[i];
 933                 vq->stats.pkts = 0;
 934                 vq->stats.bytes = 0;
 935                 vq->stats.missed_pkts = 0;
 936         }
 937 }
 938
 939 static void
 940 eth_queue_release(void *q)
 941 {
 942         rte_free(q);
 943 }
 944
 945 static int
 946 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 947                 int wait_to_complete __rte_unused)
 948 {
 949         return 0;
 950 }
 951
 952 /**
 953  * Disable features in feature_mask. Returns 0 on success.
 954  */
 955 int
 956 rte_eth_vhost_feature_disable(uint64_t feature_mask)
 957 {
 958         return rte_vhost_feature_disable(feature_mask);
 959 }
 960
 961 /**
 962  * Enable features in feature_mask. Returns 0 on success.
 963  */
 964 int
 965 rte_eth_vhost_feature_enable(uint64_t feature_mask)
 966 {
 967         return rte_vhost_feature_enable(feature_mask);
 968 }
 969
 970 /* Returns currently supported vhost features */
 971 uint64_t
 972 rte_eth_vhost_feature_get(void)
 973 {
 974         return rte_vhost_feature_get();
 975 }
 976
 977 static const struct eth_dev_ops ops = {
 978         .dev_start = eth_dev_start,
 979         .dev_stop = eth_dev_stop,
 980         .dev_close = eth_dev_close,
 981         .dev_configure = eth_dev_configure,
 982         .dev_infos_get = eth_dev_info,
 983         .rx_queue_setup = eth_rx_queue_setup,
 984         .tx_queue_setup = eth_tx_queue_setup,
 985         .rx_queue_release = eth_queue_release,
 986         .tx_queue_release = eth_queue_release,
 987         .link_update = eth_link_update,
 988         .stats_get = eth_stats_get,
 989         .stats_reset = eth_stats_reset,
 990         .xstats_reset = vhost_dev_xstats_reset,
 991         .xstats_get = vhost_dev_xstats_get,
 992         .xstats_get_names = vhost_dev_xstats_get_names,
 993 };
 994
 995 static int
 996 eth_dev_vhost_create(const char *name, char *iface_name, int16_t queues,
 997                      const unsigned numa_node, uint64_t flags)
 998 {
 999         struct rte_eth_dev_data *data = NULL;
1000         struct pmd_internal *internal = NULL;
1001         struct rte_eth_dev *eth_dev = NULL;
1002         struct ether_addr *eth_addr = NULL;
1003         struct rte_vhost_vring_state *vring_state = NULL;
1004         struct internal_list *list = NULL;
1005
1006         RTE_LOG(INFO, PMD, "Creating VHOST-USER backend on numa socket %u\n",
1007                 numa_node);
1008
1009         /* now do all data allocation - for eth_dev structure, dummy pci driver
1010          * and internal (private) data
1011          */
1012         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
1013         if (data == NULL)
1014                 goto error;
1015
1016         internal = rte_zmalloc_socket(name, sizeof(*internal), 0, numa_node);
1017         if (internal == NULL)
1018                 goto error;
1019
1020         list = rte_zmalloc_socket(name, sizeof(*list), 0, numa_node);
1021         if (list == NULL)
1022                 goto error;
1023
1024         /* reserve an ethdev entry */
1025         eth_dev = rte_eth_dev_allocate(name);
1026         if (eth_dev == NULL)
1027                 goto error;
1028
1029         eth_addr = rte_zmalloc_socket(name, sizeof(*eth_addr), 0, numa_node);
1030         if (eth_addr == NULL)
1031                 goto error;
1032         *eth_addr = base_eth_addr;
1033         eth_addr->addr_bytes[5] = eth_dev->data->port_id;
1034
1035         vring_state = rte_zmalloc_socket(name,
1036                         sizeof(*vring_state), 0, numa_node);
1037         if (vring_state == NULL)
1038                 goto error;
1039
1040         TAILQ_INIT(&eth_dev->link_intr_cbs);
1041
1042         /* now put it all together
1043          * - store queue data in internal,
1044          * - store numa_node info in ethdev data
1045          * - point eth_dev_data to internals
1046          * - and point eth_dev structure to new eth_dev_data structure
1047          */
1048         internal->dev_name = strdup(name);
1049         if (internal->dev_name == NULL)
1050                 goto error;
1051         internal->iface_name = strdup(iface_name);
1052         if (internal->iface_name == NULL)
1053                 goto error;
1054
1055         list->eth_dev = eth_dev;
1056         pthread_mutex_lock(&internal_list_lock);
1057         TAILQ_INSERT_TAIL(&internal_list, list, next);
1058         pthread_mutex_unlock(&internal_list_lock);
1059
1060         rte_spinlock_init(&vring_state->lock);
1061         vring_states[eth_dev->data->port_id] = vring_state;
1062
1063         data->dev_private = internal;
1064         data->port_id = eth_dev->data->port_id;
1065         memmove(data->name, eth_dev->data->name, sizeof(data->name));
1066         data->nb_rx_queues = queues;
1067         data->nb_tx_queues = queues;
1068         internal->max_queues = queues;
1069         data->dev_link = pmd_link;
1070         data->mac_addrs = eth_addr;
1071
1072         /* We'll replace the 'data' originally allocated by eth_dev. So the
1073          * vhost PMD resources won't be shared between multi processes.
1074          */
1075         eth_dev->data = data;
1076         eth_dev->dev_ops = &ops;
1077         eth_dev->driver = NULL;
1078         data->dev_flags =
1079                 RTE_ETH_DEV_DETACHABLE | RTE_ETH_DEV_INTR_LSC;
1080         data->kdrv = RTE_KDRV_NONE;
1081         data->drv_name = internal->dev_name;
1082         data->numa_node = numa_node;
1083
1084         /* finally assign rx and tx ops */
1085         eth_dev->rx_pkt_burst = eth_vhost_rx;
1086         eth_dev->tx_pkt_burst = eth_vhost_tx;
1087
1088         if (rte_vhost_driver_register(iface_name, flags))
1089                 goto error;
1090
1091         /* We need only one message handling thread */
1092         if (rte_atomic16_add_return(&nb_started_ports, 1) == 1) {
1093                 if (vhost_driver_session_start())
1094                         goto error;
1095         }
1096
1097         return data->port_id;
1098
1099 error:
1100         if (internal)
1101                 free(internal->dev_name);
1102         rte_free(vring_state);
1103         rte_free(eth_addr);
1104         if (eth_dev)
1105                 rte_eth_dev_release_port(eth_dev);
1106         rte_free(internal);
1107         rte_free(list);
1108         rte_free(data);
1109
1110         return -1;
1111 }
1112
1113 static inline int
1114 open_iface(const char *key __rte_unused, const char *value, void *extra_args)
1115 {
1116         const char **iface_name = extra_args;
1117
1118         if (value == NULL)
1119                 return -1;
1120
1121         *iface_name = value;
1122
1123         return 0;
1124 }
1125
1126 static inline int
1127 open_int(const char *key __rte_unused, const char *value, void *extra_args)
1128 {
1129         uint16_t *n = extra_args;
1130
1131         if (value == NULL || extra_args == NULL)
1132                 return -EINVAL;
1133
1134         *n = (uint16_t)strtoul(value, NULL, 0);
1135         if (*n == USHRT_MAX && errno == ERANGE)
1136                 return -1;
1137
1138         return 0;
1139 }
1140
1141 static int
1142 rte_pmd_vhost_probe(const char *name, const char *params)
1143 {
1144         struct rte_kvargs *kvlist = NULL;
1145         int ret = 0;
1146         char *iface_name;
1147         uint16_t queues;
1148         uint64_t flags = 0;
1149         int client_mode = 0;
1150         int dequeue_zero_copy = 0;
1151
1152         RTE_LOG(INFO, PMD, "Initializing pmd_vhost for %s\n", name);
1153
1154         kvlist = rte_kvargs_parse(params, valid_arguments);
1155         if (kvlist == NULL)
1156                 return -1;
1157
1158         if (rte_kvargs_count(kvlist, ETH_VHOST_IFACE_ARG) == 1) {
1159                 ret = rte_kvargs_process(kvlist, ETH_VHOST_IFACE_ARG,
1160                                          &open_iface, &iface_name);
1161                 if (ret < 0)
1162                         goto out_free;
1163         } else {
1164                 ret = -1;
1165                 goto out_free;
1166         }
1167
1168         if (rte_kvargs_count(kvlist, ETH_VHOST_QUEUES_ARG) == 1) {
1169                 ret = rte_kvargs_process(kvlist, ETH_VHOST_QUEUES_ARG,
1170                                          &open_int, &queues);
1171                 if (ret < 0 || queues > RTE_MAX_QUEUES_PER_PORT)
1172                         goto out_free;
1173
1174         } else
1175                 queues = 1;
1176
1177         if (rte_kvargs_count(kvlist, ETH_VHOST_CLIENT_ARG) == 1) {
1178                 ret = rte_kvargs_process(kvlist, ETH_VHOST_CLIENT_ARG,
1179                                          &open_int, &client_mode);
1180                 if (ret < 0)
1181                         goto out_free;
1182
1183                 if (client_mode)
1184                         flags |= RTE_VHOST_USER_CLIENT;
1185         }
1186
1187         if (rte_kvargs_count(kvlist, ETH_VHOST_DEQUEUE_ZERO_COPY) == 1) {
1188                 ret = rte_kvargs_process(kvlist, ETH_VHOST_DEQUEUE_ZERO_COPY,
1189                                          &open_int, &dequeue_zero_copy);
1190                 if (ret < 0)
1191                         goto out_free;
1192
1193                 if (dequeue_zero_copy)
1194                         flags |= RTE_VHOST_USER_DEQUEUE_ZERO_COPY;
1195         }
1196
1197         eth_dev_vhost_create(name, iface_name, queues, rte_socket_id(), flags);
1198
1199 out_free:
1200         rte_kvargs_free(kvlist);
1201         return ret;
1202 }
1203
1204 static int
1205 rte_pmd_vhost_remove(const char *name)
1206 {
1207         struct rte_eth_dev *eth_dev = NULL;
1208         unsigned int i;
1209
1210         RTE_LOG(INFO, PMD, "Un-Initializing pmd_vhost for %s\n", name);
1211
1212         /* find an ethdev entry */
1213         eth_dev = rte_eth_dev_allocated(name);
1214         if (eth_dev == NULL)
1215                 return -ENODEV;
1216
1217         eth_dev_stop(eth_dev);
1218
1219         eth_dev_close(eth_dev);
1220
1221         if (rte_atomic16_sub_return(&nb_started_ports, 1) == 0)
1222                 vhost_driver_session_stop();
1223
1224         rte_free(vring_states[eth_dev->data->port_id]);
1225         vring_states[eth_dev->data->port_id] = NULL;
1226
1227         for (i = 0; i < eth_dev->data->nb_rx_queues; i++)
1228                 rte_free(eth_dev->data->rx_queues[i]);
1229         for (i = 0; i < eth_dev->data->nb_tx_queues; i++)
1230                 rte_free(eth_dev->data->tx_queues[i]);
1231
1232         rte_free(eth_dev->data->mac_addrs);
1233         rte_free(eth_dev->data);
1234
1235         rte_eth_dev_release_port(eth_dev);
1236
1237         return 0;
1238 }
1239
1240 static struct rte_vdev_driver pmd_vhost_drv = {
1241         .probe = rte_pmd_vhost_probe,
1242         .remove = rte_pmd_vhost_remove,
1243 };
1244
1245 RTE_PMD_REGISTER_VDEV(net_vhost, pmd_vhost_drv);
1246 RTE_PMD_REGISTER_ALIAS(net_vhost, eth_vhost);
1247 RTE_PMD_REGISTER_PARAM_STRING(net_vhost,
1248         "iface=<ifc> "
1249         "queues=<int>");