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 #define VHOST_MAX_PKT_BURST 32
  56
  57 static const char *valid_arguments[] = {
  58         ETH_VHOST_IFACE_ARG,
  59         ETH_VHOST_QUEUES_ARG,
  60         ETH_VHOST_CLIENT_ARG,
  61         ETH_VHOST_DEQUEUE_ZERO_COPY,
  62         NULL
  63 };
  64
  65 static struct ether_addr base_eth_addr = {
  66         .addr_bytes = {
  67                 0x56 /* V */,
  68                 0x48 /* H */,
  69                 0x4F /* O */,
  70                 0x53 /* S */,
  71                 0x54 /* T */,
  72                 0x00
  73         }
  74 };
  75
  76 enum vhost_xstats_pkts {
  77         VHOST_UNDERSIZE_PKT = 0,
  78         VHOST_64_PKT,
  79         VHOST_65_TO_127_PKT,
  80         VHOST_128_TO_255_PKT,
  81         VHOST_256_TO_511_PKT,
  82         VHOST_512_TO_1023_PKT,
  83         VHOST_1024_TO_1522_PKT,
  84         VHOST_1523_TO_MAX_PKT,
  85         VHOST_BROADCAST_PKT,
  86         VHOST_MULTICAST_PKT,
  87         VHOST_UNICAST_PKT,
  88         VHOST_ERRORS_PKT,
  89         VHOST_ERRORS_FRAGMENTED,
  90         VHOST_ERRORS_JABBER,
  91         VHOST_UNKNOWN_PROTOCOL,
  92         VHOST_XSTATS_MAX,
  93 };
  94
  95 struct vhost_stats {
  96         uint64_t pkts;
  97         uint64_t bytes;
  98         uint64_t missed_pkts;
  99         uint64_t xstats[VHOST_XSTATS_MAX];
 100 };
 101
 102 struct vhost_queue {
 103         int vid;
 104         rte_atomic32_t allow_queuing;
 105         rte_atomic32_t while_queuing;
 106         struct pmd_internal *internal;
 107         struct rte_mempool *mb_pool;
 108         uint8_t port;
 109         uint16_t virtqueue_id;
 110         struct vhost_stats stats;
 111 };
 112
 113 struct pmd_internal {
 114         rte_atomic32_t dev_attached;
 115         char *dev_name;
 116         char *iface_name;
 117         uint16_t max_queues;
 118         rte_atomic32_t started;
 119 };
 120
 121 struct internal_list {
 122         TAILQ_ENTRY(internal_list) next;
 123         struct rte_eth_dev *eth_dev;
 124 };
 125
 126 TAILQ_HEAD(internal_list_head, internal_list);
 127 static struct internal_list_head internal_list =
 128         TAILQ_HEAD_INITIALIZER(internal_list);
 129
 130 static pthread_mutex_t internal_list_lock = PTHREAD_MUTEX_INITIALIZER;
 131
 132 static rte_atomic16_t nb_started_ports;
 133 static pthread_t session_th;
 134
 135 static struct rte_eth_link pmd_link = {
 136                 .link_speed = 10000,
 137                 .link_duplex = ETH_LINK_FULL_DUPLEX,
 138                 .link_status = ETH_LINK_DOWN
 139 };
 140
 141 struct rte_vhost_vring_state {
 142         rte_spinlock_t lock;
 143
 144         bool cur[RTE_MAX_QUEUES_PER_PORT * 2];
 145         bool seen[RTE_MAX_QUEUES_PER_PORT * 2];
 146         unsigned int index;
 147         unsigned int max_vring;
 148 };
 149
 150 static struct rte_vhost_vring_state *vring_states[RTE_MAX_ETHPORTS];
 151
 152 #define VHOST_XSTATS_NAME_SIZE 64
 153
 154 struct vhost_xstats_name_off {
 155         char name[VHOST_XSTATS_NAME_SIZE];
 156         uint64_t offset;
 157 };
 158
 159 /* [rx]_is prepended to the name string here */
 160 static const struct vhost_xstats_name_off vhost_rxport_stat_strings[] = {
 161         {"good_packets",
 162          offsetof(struct vhost_queue, stats.pkts)},
 163         {"total_bytes",
 164          offsetof(struct vhost_queue, stats.bytes)},
 165         {"missed_pkts",
 166          offsetof(struct vhost_queue, stats.missed_pkts)},
 167         {"broadcast_packets",
 168          offsetof(struct vhost_queue, stats.xstats[VHOST_BROADCAST_PKT])},
 169         {"multicast_packets",
 170          offsetof(struct vhost_queue, stats.xstats[VHOST_MULTICAST_PKT])},
 171         {"unicast_packets",
 172          offsetof(struct vhost_queue, stats.xstats[VHOST_UNICAST_PKT])},
 173          {"undersize_packets",
 174          offsetof(struct vhost_queue, stats.xstats[VHOST_UNDERSIZE_PKT])},
 175         {"size_64_packets",
 176          offsetof(struct vhost_queue, stats.xstats[VHOST_64_PKT])},
 177         {"size_65_to_127_packets",
 178          offsetof(struct vhost_queue, stats.xstats[VHOST_65_TO_127_PKT])},
 179         {"size_128_to_255_packets",
 180          offsetof(struct vhost_queue, stats.xstats[VHOST_128_TO_255_PKT])},
 181         {"size_256_to_511_packets",
 182          offsetof(struct vhost_queue, stats.xstats[VHOST_256_TO_511_PKT])},
 183         {"size_512_to_1023_packets",
 184          offsetof(struct vhost_queue, stats.xstats[VHOST_512_TO_1023_PKT])},
 185         {"size_1024_to_1522_packets",
 186          offsetof(struct vhost_queue, stats.xstats[VHOST_1024_TO_1522_PKT])},
 187         {"size_1523_to_max_packets",
 188          offsetof(struct vhost_queue, stats.xstats[VHOST_1523_TO_MAX_PKT])},
 189         {"errors_with_bad_CRC",
 190          offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_PKT])},
 191         {"fragmented_errors",
 192          offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_FRAGMENTED])},
 193         {"jabber_errors",
 194          offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_JABBER])},
 195         {"unknown_protos_packets",
 196          offsetof(struct vhost_queue, stats.xstats[VHOST_UNKNOWN_PROTOCOL])},
 197 };
 198
 199 /* [tx]_ is prepended to the name string here */
 200 static const struct vhost_xstats_name_off vhost_txport_stat_strings[] = {
 201         {"good_packets",
 202          offsetof(struct vhost_queue, stats.pkts)},
 203         {"total_bytes",
 204          offsetof(struct vhost_queue, stats.bytes)},
 205         {"missed_pkts",
 206          offsetof(struct vhost_queue, stats.missed_pkts)},
 207         {"broadcast_packets",
 208          offsetof(struct vhost_queue, stats.xstats[VHOST_BROADCAST_PKT])},
 209         {"multicast_packets",
 210          offsetof(struct vhost_queue, stats.xstats[VHOST_MULTICAST_PKT])},
 211         {"unicast_packets",
 212          offsetof(struct vhost_queue, stats.xstats[VHOST_UNICAST_PKT])},
 213         {"undersize_packets",
 214          offsetof(struct vhost_queue, stats.xstats[VHOST_UNDERSIZE_PKT])},
 215         {"size_64_packets",
 216          offsetof(struct vhost_queue, stats.xstats[VHOST_64_PKT])},
 217         {"size_65_to_127_packets",
 218          offsetof(struct vhost_queue, stats.xstats[VHOST_65_TO_127_PKT])},
 219         {"size_128_to_255_packets",
 220          offsetof(struct vhost_queue, stats.xstats[VHOST_128_TO_255_PKT])},
 221         {"size_256_to_511_packets",
 222          offsetof(struct vhost_queue, stats.xstats[VHOST_256_TO_511_PKT])},
 223         {"size_512_to_1023_packets",
 224          offsetof(struct vhost_queue, stats.xstats[VHOST_512_TO_1023_PKT])},
 225         {"size_1024_to_1522_packets",
 226          offsetof(struct vhost_queue, stats.xstats[VHOST_1024_TO_1522_PKT])},
 227         {"size_1523_to_max_packets",
 228          offsetof(struct vhost_queue, stats.xstats[VHOST_1523_TO_MAX_PKT])},
 229         {"errors_with_bad_CRC",
 230          offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_PKT])},
 231 };
 232
 233 #define VHOST_NB_XSTATS_RXPORT (sizeof(vhost_rxport_stat_strings) / \
 234                                 sizeof(vhost_rxport_stat_strings[0]))
 235
 236 #define VHOST_NB_XSTATS_TXPORT (sizeof(vhost_txport_stat_strings) / \
 237                                 sizeof(vhost_txport_stat_strings[0]))
 238
 239 static void
 240 vhost_dev_xstats_reset(struct rte_eth_dev *dev)
 241 {
 242         struct vhost_queue *vq = NULL;
 243         unsigned int i = 0;
 244
 245         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 246                 vq = dev->data->rx_queues[i];
 247                 if (!vq)
 248                         continue;
 249                 memset(&vq->stats, 0, sizeof(vq->stats));
 250         }
 251         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 252                 vq = dev->data->tx_queues[i];
 253                 if (!vq)
 254                         continue;
 255                 memset(&vq->stats, 0, sizeof(vq->stats));
 256         }
 257 }
 258
 259 static int
 260 vhost_dev_xstats_get_names(struct rte_eth_dev *dev __rte_unused,
 261                            struct rte_eth_xstat_name *xstats_names,
 262                            unsigned int limit __rte_unused)
 263 {
 264         unsigned int t = 0;
 265         int count = 0;
 266         int nstats = VHOST_NB_XSTATS_RXPORT + VHOST_NB_XSTATS_TXPORT;
 267
 268         if (!xstats_names)
 269                 return nstats;
 270         for (t = 0; t < VHOST_NB_XSTATS_RXPORT; t++) {
 271                 snprintf(xstats_names[count].name,
 272                          sizeof(xstats_names[count].name),
 273                          "rx_%s", vhost_rxport_stat_strings[t].name);
 274                 count++;
 275         }
 276         for (t = 0; t < VHOST_NB_XSTATS_TXPORT; t++) {
 277                 snprintf(xstats_names[count].name,
 278                          sizeof(xstats_names[count].name),
 279                          "tx_%s", vhost_txport_stat_strings[t].name);
 280                 count++;
 281         }
 282         return count;
 283 }
 284
 285 static int
 286 vhost_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 287                      unsigned int n)
 288 {
 289         unsigned int i;
 290         unsigned int t;
 291         unsigned int count = 0;
 292         struct vhost_queue *vq = NULL;
 293         unsigned int nxstats = VHOST_NB_XSTATS_RXPORT + VHOST_NB_XSTATS_TXPORT;
 294
 295         if (n < nxstats)
 296                 return nxstats;
 297
 298         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 299                 vq = dev->data->rx_queues[i];
 300                 if (!vq)
 301                         continue;
 302                 vq->stats.xstats[VHOST_UNICAST_PKT] = vq->stats.pkts
 303                                 - (vq->stats.xstats[VHOST_BROADCAST_PKT]
 304                                 + vq->stats.xstats[VHOST_MULTICAST_PKT]);
 305         }
 306         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 307                 vq = dev->data->tx_queues[i];
 308                 if (!vq)
 309                         continue;
 310                 vq->stats.xstats[VHOST_UNICAST_PKT] = vq->stats.pkts
 311                                 + vq->stats.missed_pkts
 312                                 - (vq->stats.xstats[VHOST_BROADCAST_PKT]
 313                                 + vq->stats.xstats[VHOST_MULTICAST_PKT]);
 314         }
 315         for (t = 0; t < VHOST_NB_XSTATS_RXPORT; t++) {
 316                 xstats[count].value = 0;
 317                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 318                         vq = dev->data->rx_queues[i];
 319                         if (!vq)
 320                                 continue;
 321                         xstats[count].value +=
 322                                 *(uint64_t *)(((char *)vq)
 323                                 + vhost_rxport_stat_strings[t].offset);
 324                 }
 325                 xstats[count].id = count;
 326                 count++;
 327         }
 328         for (t = 0; t < VHOST_NB_XSTATS_TXPORT; t++) {
 329                 xstats[count].value = 0;
 330                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 331                         vq = dev->data->tx_queues[i];
 332                         if (!vq)
 333                                 continue;
 334                         xstats[count].value +=
 335                                 *(uint64_t *)(((char *)vq)
 336                                 + vhost_txport_stat_strings[t].offset);
 337                 }
 338                 xstats[count].id = count;
 339                 count++;
 340         }
 341         return count;
 342 }
 343
 344 static inline void
 345 vhost_count_multicast_broadcast(struct vhost_queue *vq,
 346                                 struct rte_mbuf *mbuf)
 347 {
 348         struct ether_addr *ea = NULL;
 349         struct vhost_stats *pstats = &vq->stats;
 350
 351         ea = rte_pktmbuf_mtod(mbuf, struct ether_addr *);
 352         if (is_multicast_ether_addr(ea)) {
 353                 if (is_broadcast_ether_addr(ea))
 354                         pstats->xstats[VHOST_BROADCAST_PKT]++;
 355                 else
 356                         pstats->xstats[VHOST_MULTICAST_PKT]++;
 357         }
 358 }
 359
 360 static void
 361 vhost_update_packet_xstats(struct vhost_queue *vq,
 362                            struct rte_mbuf **bufs,
 363                            uint16_t count)
 364 {
 365         uint32_t pkt_len = 0;
 366         uint64_t i = 0;
 367         uint64_t index;
 368         struct vhost_stats *pstats = &vq->stats;
 369
 370         for (i = 0; i < count ; i++) {
 371                 pkt_len = bufs[i]->pkt_len;
 372                 if (pkt_len == 64) {
 373                         pstats->xstats[VHOST_64_PKT]++;
 374                 } else if (pkt_len > 64 && pkt_len < 1024) {
 375                         index = (sizeof(pkt_len) * 8)
 376                                 - __builtin_clz(pkt_len) - 5;
 377                         pstats->xstats[index]++;
 378                 } else {
 379                         if (pkt_len < 64)
 380                                 pstats->xstats[VHOST_UNDERSIZE_PKT]++;
 381                         else if (pkt_len <= 1522)
 382                                 pstats->xstats[VHOST_1024_TO_1522_PKT]++;
 383                         else if (pkt_len > 1522)
 384                                 pstats->xstats[VHOST_1523_TO_MAX_PKT]++;
 385                 }
 386                 vhost_count_multicast_broadcast(vq, bufs[i]);
 387         }
 388 }
 389
 390 static uint16_t
 391 eth_vhost_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 392 {
 393         struct vhost_queue *r = q;
 394         uint16_t i, nb_rx = 0;
 395         uint16_t nb_receive = nb_bufs;
 396
 397         if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
 398                 return 0;
 399
 400         rte_atomic32_set(&r->while_queuing, 1);
 401
 402         if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
 403                 goto out;
 404
 405         /* Dequeue packets from guest TX queue */
 406         while (nb_receive) {
 407                 uint16_t nb_pkts;
 408                 uint16_t num = (uint16_t)RTE_MIN(nb_receive,
 409                                                  VHOST_MAX_PKT_BURST);
 410
 411                 nb_pkts = rte_vhost_dequeue_burst(r->vid, r->virtqueue_id,
 412                                                   r->mb_pool, &bufs[nb_rx],
 413                                                   num);
 414
 415                 nb_rx += nb_pkts;
 416                 nb_receive -= nb_pkts;
 417                 if (nb_pkts < num)
 418                         break;
 419         }
 420
 421         r->stats.pkts += nb_rx;
 422
 423         for (i = 0; likely(i < nb_rx); i++) {
 424                 bufs[i]->port = r->port;
 425                 r->stats.bytes += bufs[i]->pkt_len;
 426         }
 427
 428         vhost_update_packet_xstats(r, bufs, nb_rx);
 429
 430 out:
 431         rte_atomic32_set(&r->while_queuing, 0);
 432
 433         return nb_rx;
 434 }
 435
 436 static uint16_t
 437 eth_vhost_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 438 {
 439         struct vhost_queue *r = q;
 440         uint16_t i, nb_tx = 0;
 441         uint16_t nb_send = nb_bufs;
 442
 443         if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
 444                 return 0;
 445
 446         rte_atomic32_set(&r->while_queuing, 1);
 447
 448         if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
 449                 goto out;
 450
 451         /* Enqueue packets to guest RX queue */
 452         while (nb_send) {
 453                 uint16_t nb_pkts;
 454                 uint16_t num = (uint16_t)RTE_MIN(nb_send,
 455                                                  VHOST_MAX_PKT_BURST);
 456
 457                 nb_pkts = rte_vhost_enqueue_burst(r->vid, r->virtqueue_id,
 458                                                   &bufs[nb_tx], num);
 459
 460                 nb_tx += nb_pkts;
 461                 nb_send -= nb_pkts;
 462                 if (nb_pkts < num)
 463                         break;
 464         }
 465
 466         r->stats.pkts += nb_tx;
 467         r->stats.missed_pkts += nb_bufs - nb_tx;
 468
 469         for (i = 0; likely(i < nb_tx); i++)
 470                 r->stats.bytes += bufs[i]->pkt_len;
 471
 472         vhost_update_packet_xstats(r, bufs, nb_tx);
 473
 474         /* According to RFC2863 page42 section ifHCOutMulticastPkts and
 475          * ifHCOutBroadcastPkts, the counters "multicast" and "broadcast"
 476          * are increased when packets are not transmitted successfully.
 477          */
 478         for (i = nb_tx; i < nb_bufs; i++)
 479                 vhost_count_multicast_broadcast(r, bufs[i]);
 480
 481         for (i = 0; likely(i < nb_tx); i++)
 482                 rte_pktmbuf_free(bufs[i]);
 483 out:
 484         rte_atomic32_set(&r->while_queuing, 0);
 485
 486         return nb_tx;
 487 }
 488
 489 static int
 490 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 491 {
 492         return 0;
 493 }
 494
 495 static inline struct internal_list *
 496 find_internal_resource(char *ifname)
 497 {
 498         int found = 0;
 499         struct internal_list *list;
 500         struct pmd_internal *internal;
 501
 502         if (ifname == NULL)
 503                 return NULL;
 504
 505         pthread_mutex_lock(&internal_list_lock);
 506
 507         TAILQ_FOREACH(list, &internal_list, next) {
 508                 internal = list->eth_dev->data->dev_private;
 509                 if (!strcmp(internal->iface_name, ifname)) {
 510                         found = 1;
 511                         break;
 512                 }
 513         }
 514
 515         pthread_mutex_unlock(&internal_list_lock);
 516
 517         if (!found)
 518                 return NULL;
 519
 520         return list;
 521 }
 522
 523 static void
 524 update_queuing_status(struct rte_eth_dev *dev)
 525 {
 526         struct pmd_internal *internal = dev->data->dev_private;
 527         struct vhost_queue *vq;
 528         unsigned int i;
 529         int allow_queuing = 1;
 530
 531         if (rte_atomic32_read(&internal->started) == 0 ||
 532             rte_atomic32_read(&internal->dev_attached) == 0)
 533                 allow_queuing = 0;
 534
 535         /* Wait until rx/tx_pkt_burst stops accessing vhost device */
 536         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 537                 vq = dev->data->rx_queues[i];
 538                 if (vq == NULL)
 539                         continue;
 540                 rte_atomic32_set(&vq->allow_queuing, allow_queuing);
 541                 while (rte_atomic32_read(&vq->while_queuing))
 542                         rte_pause();
 543         }
 544
 545         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 546                 vq = dev->data->tx_queues[i];
 547                 if (vq == NULL)
 548                         continue;
 549                 rte_atomic32_set(&vq->allow_queuing, allow_queuing);
 550                 while (rte_atomic32_read(&vq->while_queuing))
 551                         rte_pause();
 552         }
 553 }
 554
 555 static int
 556 new_device(int vid)
 557 {
 558         struct rte_eth_dev *eth_dev;
 559         struct internal_list *list;
 560         struct pmd_internal *internal;
 561         struct vhost_queue *vq;
 562         unsigned i;
 563         char ifname[PATH_MAX];
 564 #ifdef RTE_LIBRTE_VHOST_NUMA
 565         int newnode;
 566 #endif
 567
 568         rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
 569         list = find_internal_resource(ifname);
 570         if (list == NULL) {
 571                 RTE_LOG(INFO, PMD, "Invalid device name: %s\n", ifname);
 572                 return -1;
 573         }
 574
 575         eth_dev = list->eth_dev;
 576         internal = eth_dev->data->dev_private;
 577
 578 #ifdef RTE_LIBRTE_VHOST_NUMA
 579         newnode = rte_vhost_get_numa_node(vid);
 580         if (newnode >= 0)
 581                 eth_dev->data->numa_node = newnode;
 582 #endif
 583
 584         for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
 585                 vq = eth_dev->data->rx_queues[i];
 586                 if (vq == NULL)
 587                         continue;
 588                 vq->vid = vid;
 589                 vq->internal = internal;
 590                 vq->port = eth_dev->data->port_id;
 591         }
 592         for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
 593                 vq = eth_dev->data->tx_queues[i];
 594                 if (vq == NULL)
 595                         continue;
 596                 vq->vid = vid;
 597                 vq->internal = internal;
 598                 vq->port = eth_dev->data->port_id;
 599         }
 600
 601         for (i = 0; i < rte_vhost_get_queue_num(vid) * VIRTIO_QNUM; i++)
 602                 rte_vhost_enable_guest_notification(vid, i, 0);
 603
 604         eth_dev->data->dev_link.link_status = ETH_LINK_UP;
 605
 606         rte_atomic32_set(&internal->dev_attached, 1);
 607         update_queuing_status(eth_dev);
 608
 609         RTE_LOG(INFO, PMD, "New connection established\n");
 610
 611         _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 612
 613         return 0;
 614 }
 615
 616 static void
 617 destroy_device(int vid)
 618 {
 619         struct rte_eth_dev *eth_dev;
 620         struct pmd_internal *internal;
 621         struct vhost_queue *vq;
 622         struct internal_list *list;
 623         char ifname[PATH_MAX];
 624         unsigned i;
 625         struct rte_vhost_vring_state *state;
 626
 627         rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
 628         list = find_internal_resource(ifname);
 629         if (list == NULL) {
 630                 RTE_LOG(ERR, PMD, "Invalid interface name: %s\n", ifname);
 631                 return;
 632         }
 633         eth_dev = list->eth_dev;
 634         internal = eth_dev->data->dev_private;
 635
 636         rte_atomic32_set(&internal->dev_attached, 0);
 637         update_queuing_status(eth_dev);
 638
 639         eth_dev->data->dev_link.link_status = ETH_LINK_DOWN;
 640
 641         for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
 642                 vq = eth_dev->data->rx_queues[i];
 643                 if (vq == NULL)
 644                         continue;
 645                 vq->vid = -1;
 646         }
 647         for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
 648                 vq = eth_dev->data->tx_queues[i];
 649                 if (vq == NULL)
 650                         continue;
 651                 vq->vid = -1;
 652         }
 653
 654         state = vring_states[eth_dev->data->port_id];
 655         rte_spinlock_lock(&state->lock);
 656         for (i = 0; i <= state->max_vring; i++) {
 657                 state->cur[i] = false;
 658                 state->seen[i] = false;
 659         }
 660         state->max_vring = 0;
 661         rte_spinlock_unlock(&state->lock);
 662
 663         RTE_LOG(INFO, PMD, "Connection closed\n");
 664
 665         _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 666 }
 667
 668 static int
 669 vring_state_changed(int vid, uint16_t vring, int enable)
 670 {
 671         struct rte_vhost_vring_state *state;
 672         struct rte_eth_dev *eth_dev;
 673         struct internal_list *list;
 674         char ifname[PATH_MAX];
 675
 676         rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
 677         list = find_internal_resource(ifname);
 678         if (list == NULL) {
 679                 RTE_LOG(ERR, PMD, "Invalid interface name: %s\n", ifname);
 680                 return -1;
 681         }
 682
 683         eth_dev = list->eth_dev;
 684         /* won't be NULL */
 685         state = vring_states[eth_dev->data->port_id];
 686         rte_spinlock_lock(&state->lock);
 687         state->cur[vring] = enable;
 688         state->max_vring = RTE_MAX(vring, state->max_vring);
 689         rte_spinlock_unlock(&state->lock);
 690
 691         RTE_LOG(INFO, PMD, "vring%u is %s\n",
 692                         vring, enable ? "enabled" : "disabled");
 693
 694         _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_QUEUE_STATE, NULL);
 695
 696         return 0;
 697 }
 698
 699 int
 700 rte_eth_vhost_get_queue_event(uint8_t port_id,
 701                 struct rte_eth_vhost_queue_event *event)
 702 {
 703         struct rte_vhost_vring_state *state;
 704         unsigned int i;
 705         int idx;
 706
 707         if (port_id >= RTE_MAX_ETHPORTS) {
 708                 RTE_LOG(ERR, PMD, "Invalid port id\n");
 709                 return -1;
 710         }
 711
 712         state = vring_states[port_id];
 713         if (!state) {
 714                 RTE_LOG(ERR, PMD, "Unused port\n");
 715                 return -1;
 716         }
 717
 718         rte_spinlock_lock(&state->lock);
 719         for (i = 0; i <= state->max_vring; i++) {
 720                 idx = state->index++ % (state->max_vring + 1);
 721
 722                 if (state->cur[idx] != state->seen[idx]) {
 723                         state->seen[idx] = state->cur[idx];
 724                         event->queue_id = idx / 2;
 725                         event->rx = idx & 1;
 726                         event->enable = state->cur[idx];
 727                         rte_spinlock_unlock(&state->lock);
 728                         return 0;
 729                 }
 730         }
 731         rte_spinlock_unlock(&state->lock);
 732
 733         return -1;
 734 }
 735
 736 int
 737 rte_eth_vhost_get_vid_from_port_id(uint8_t port_id)
 738 {
 739         struct internal_list *list;
 740         struct rte_eth_dev *eth_dev;
 741         struct vhost_queue *vq;
 742         int vid = -1;
 743
 744         if (!rte_eth_dev_is_valid_port(port_id))
 745                 return -1;
 746
 747         pthread_mutex_lock(&internal_list_lock);
 748
 749         TAILQ_FOREACH(list, &internal_list, next) {
 750                 eth_dev = list->eth_dev;
 751                 if (eth_dev->data->port_id == port_id) {
 752                         vq = eth_dev->data->rx_queues[0];
 753                         if (vq) {
 754                                 vid = vq->vid;
 755                         }
 756                         break;
 757                 }
 758         }
 759
 760         pthread_mutex_unlock(&internal_list_lock);
 761
 762         return vid;
 763 }
 764
 765 static void *
 766 vhost_driver_session(void *param __rte_unused)
 767 {
 768         static struct virtio_net_device_ops vhost_ops;
 769
 770         /* set vhost arguments */
 771         vhost_ops.new_device = new_device;
 772         vhost_ops.destroy_device = destroy_device;
 773         vhost_ops.vring_state_changed = vring_state_changed;
 774         if (rte_vhost_driver_callback_register(&vhost_ops) < 0)
 775                 RTE_LOG(ERR, PMD, "Can't register callbacks\n");
 776
 777         /* start event handling */
 778         rte_vhost_driver_session_start();
 779
 780         return NULL;
 781 }
 782
 783 static int
 784 vhost_driver_session_start(void)
 785 {
 786         int ret;
 787
 788         ret = pthread_create(&session_th,
 789                         NULL, vhost_driver_session, NULL);
 790         if (ret)
 791                 RTE_LOG(ERR, PMD, "Can't create a thread\n");
 792
 793         return ret;
 794 }
 795
 796 static void
 797 vhost_driver_session_stop(void)
 798 {
 799         int ret;
 800
 801         ret = pthread_cancel(session_th);
 802         if (ret)
 803                 RTE_LOG(ERR, PMD, "Can't cancel the thread\n");
 804
 805         ret = pthread_join(session_th, NULL);
 806         if (ret)
 807                 RTE_LOG(ERR, PMD, "Can't join the thread\n");
 808 }
 809
 810 static int
 811 eth_dev_start(struct rte_eth_dev *dev)
 812 {
 813         struct pmd_internal *internal = dev->data->dev_private;
 814
 815         rte_atomic32_set(&internal->started, 1);
 816         update_queuing_status(dev);
 817
 818         return 0;
 819 }
 820
 821 static void
 822 eth_dev_stop(struct rte_eth_dev *dev)
 823 {
 824         struct pmd_internal *internal = dev->data->dev_private;
 825
 826         rte_atomic32_set(&internal->started, 0);
 827         update_queuing_status(dev);
 828 }
 829
 830 static void
 831 eth_dev_close(struct rte_eth_dev *dev)
 832 {
 833         struct pmd_internal *internal;
 834         struct internal_list *list;
 835
 836         internal = dev->data->dev_private;
 837         if (!internal)
 838                 return;
 839
 840         rte_vhost_driver_unregister(internal->iface_name);
 841
 842         list = find_internal_resource(internal->iface_name);
 843         if (!list)
 844                 return;
 845
 846         pthread_mutex_lock(&internal_list_lock);
 847         TAILQ_REMOVE(&internal_list, list, next);
 848         pthread_mutex_unlock(&internal_list_lock);
 849         rte_free(list);
 850
 851         free(internal->dev_name);
 852         free(internal->iface_name);
 853         rte_free(internal);
 854 }
 855
 856 static int
 857 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 858                    uint16_t nb_rx_desc __rte_unused,
 859                    unsigned int socket_id,
 860                    const struct rte_eth_rxconf *rx_conf __rte_unused,
 861                    struct rte_mempool *mb_pool)
 862 {
 863         struct vhost_queue *vq;
 864
 865         vq = rte_zmalloc_socket(NULL, sizeof(struct vhost_queue),
 866                         RTE_CACHE_LINE_SIZE, socket_id);
 867         if (vq == NULL) {
 868                 RTE_LOG(ERR, PMD, "Failed to allocate memory for rx queue\n");
 869                 return -ENOMEM;
 870         }
 871
 872         vq->mb_pool = mb_pool;
 873         vq->virtqueue_id = rx_queue_id * VIRTIO_QNUM + VIRTIO_TXQ;
 874         dev->data->rx_queues[rx_queue_id] = vq;
 875
 876         return 0;
 877 }
 878
 879 static int
 880 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 881                    uint16_t nb_tx_desc __rte_unused,
 882                    unsigned int socket_id,
 883                    const struct rte_eth_txconf *tx_conf __rte_unused)
 884 {
 885         struct vhost_queue *vq;
 886
 887         vq = rte_zmalloc_socket(NULL, sizeof(struct vhost_queue),
 888                         RTE_CACHE_LINE_SIZE, socket_id);
 889         if (vq == NULL) {
 890                 RTE_LOG(ERR, PMD, "Failed to allocate memory for tx queue\n");
 891                 return -ENOMEM;
 892         }
 893
 894         vq->virtqueue_id = tx_queue_id * VIRTIO_QNUM + VIRTIO_RXQ;
 895         dev->data->tx_queues[tx_queue_id] = vq;
 896
 897         return 0;
 898 }
 899
 900 static void
 901 eth_dev_info(struct rte_eth_dev *dev,
 902              struct rte_eth_dev_info *dev_info)
 903 {
 904         struct pmd_internal *internal;
 905
 906         internal = dev->data->dev_private;
 907         if (internal == NULL) {
 908                 RTE_LOG(ERR, PMD, "Invalid device specified\n");
 909                 return;
 910         }
 911
 912         dev_info->max_mac_addrs = 1;
 913         dev_info->max_rx_pktlen = (uint32_t)-1;
 914         dev_info->max_rx_queues = internal->max_queues;
 915         dev_info->max_tx_queues = internal->max_queues;
 916         dev_info->min_rx_bufsize = 0;
 917 }
 918
 919 static void
 920 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 921 {
 922         unsigned i;
 923         unsigned long rx_total = 0, tx_total = 0, tx_missed_total = 0;
 924         unsigned long rx_total_bytes = 0, tx_total_bytes = 0;
 925         struct vhost_queue *vq;
 926
 927         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 928                         i < dev->data->nb_rx_queues; i++) {
 929                 if (dev->data->rx_queues[i] == NULL)
 930                         continue;
 931                 vq = dev->data->rx_queues[i];
 932                 stats->q_ipackets[i] = vq->stats.pkts;
 933                 rx_total += stats->q_ipackets[i];
 934
 935                 stats->q_ibytes[i] = vq->stats.bytes;
 936                 rx_total_bytes += stats->q_ibytes[i];
 937         }
 938
 939         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 940                         i < dev->data->nb_tx_queues; i++) {
 941                 if (dev->data->tx_queues[i] == NULL)
 942                         continue;
 943                 vq = dev->data->tx_queues[i];
 944                 stats->q_opackets[i] = vq->stats.pkts;
 945                 tx_missed_total += vq->stats.missed_pkts;
 946                 tx_total += stats->q_opackets[i];
 947
 948                 stats->q_obytes[i] = vq->stats.bytes;
 949                 tx_total_bytes += stats->q_obytes[i];
 950         }
 951
 952         stats->ipackets = rx_total;
 953         stats->opackets = tx_total;
 954         stats->oerrors = tx_missed_total;
 955         stats->ibytes = rx_total_bytes;
 956         stats->obytes = tx_total_bytes;
 957 }
 958
 959 static void
 960 eth_stats_reset(struct rte_eth_dev *dev)
 961 {
 962         struct vhost_queue *vq;
 963         unsigned i;
 964
 965         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 966                 if (dev->data->rx_queues[i] == NULL)
 967                         continue;
 968                 vq = dev->data->rx_queues[i];
 969                 vq->stats.pkts = 0;
 970                 vq->stats.bytes = 0;
 971         }
 972         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 973                 if (dev->data->tx_queues[i] == NULL)
 974                         continue;
 975                 vq = dev->data->tx_queues[i];
 976                 vq->stats.pkts = 0;
 977                 vq->stats.bytes = 0;
 978                 vq->stats.missed_pkts = 0;
 979         }
 980 }
 981
 982 static void
 983 eth_queue_release(void *q)
 984 {
 985         rte_free(q);
 986 }
 987
 988 static int
 989 eth_tx_done_cleanup(void *txq __rte_unused, uint32_t free_cnt __rte_unused)
 990 {
 991         /*
 992          * vHost does not hang onto mbuf. eth_vhost_tx() copies packet data
 993          * and releases mbuf, so nothing to cleanup.
 994          */
 995         return 0;
 996 }
 997
 998 static int
 999 eth_link_update(struct rte_eth_dev *dev __rte_unused,
1000                 int wait_to_complete __rte_unused)
1001 {
1002         return 0;
1003 }
1004
1005 /**
1006  * Disable features in feature_mask. Returns 0 on success.
1007  */
1008 int
1009 rte_eth_vhost_feature_disable(uint64_t feature_mask)
1010 {
1011         return rte_vhost_feature_disable(feature_mask);
1012 }
1013
1014 /**
1015  * Enable features in feature_mask. Returns 0 on success.
1016  */
1017 int
1018 rte_eth_vhost_feature_enable(uint64_t feature_mask)
1019 {
1020         return rte_vhost_feature_enable(feature_mask);
1021 }
1022
1023 /* Returns currently supported vhost features */
1024 uint64_t
1025 rte_eth_vhost_feature_get(void)
1026 {
1027         return rte_vhost_feature_get();
1028 }
1029
1030 static const struct eth_dev_ops ops = {
1031         .dev_start = eth_dev_start,
1032         .dev_stop = eth_dev_stop,
1033         .dev_close = eth_dev_close,
1034         .dev_configure = eth_dev_configure,
1035         .dev_infos_get = eth_dev_info,
1036         .rx_queue_setup = eth_rx_queue_setup,
1037         .tx_queue_setup = eth_tx_queue_setup,
1038         .rx_queue_release = eth_queue_release,
1039         .tx_queue_release = eth_queue_release,
1040         .tx_done_cleanup = eth_tx_done_cleanup,
1041         .link_update = eth_link_update,
1042         .stats_get = eth_stats_get,
1043         .stats_reset = eth_stats_reset,
1044         .xstats_reset = vhost_dev_xstats_reset,
1045         .xstats_get = vhost_dev_xstats_get,
1046         .xstats_get_names = vhost_dev_xstats_get_names,
1047 };
1048
1049 static struct rte_vdev_driver pmd_vhost_drv;
1050
1051 static int
1052 eth_dev_vhost_create(const char *name, char *iface_name, int16_t queues,
1053                      const unsigned numa_node, uint64_t flags)
1054 {
1055         struct rte_eth_dev_data *data = NULL;
1056         struct pmd_internal *internal = NULL;
1057         struct rte_eth_dev *eth_dev = NULL;
1058         struct ether_addr *eth_addr = NULL;
1059         struct rte_vhost_vring_state *vring_state = NULL;
1060         struct internal_list *list = NULL;
1061
1062         RTE_LOG(INFO, PMD, "Creating VHOST-USER backend on numa socket %u\n",
1063                 numa_node);
1064
1065         /* now do all data allocation - for eth_dev structure, dummy pci driver
1066          * and internal (private) data
1067          */
1068         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
1069         if (data == NULL)
1070                 goto error;
1071
1072         internal = rte_zmalloc_socket(name, sizeof(*internal), 0, numa_node);
1073         if (internal == NULL)
1074                 goto error;
1075
1076         list = rte_zmalloc_socket(name, sizeof(*list), 0, numa_node);
1077         if (list == NULL)
1078                 goto error;
1079
1080         /* reserve an ethdev entry */
1081         eth_dev = rte_eth_dev_allocate(name);
1082         if (eth_dev == NULL)
1083                 goto error;
1084
1085         eth_addr = rte_zmalloc_socket(name, sizeof(*eth_addr), 0, numa_node);
1086         if (eth_addr == NULL)
1087                 goto error;
1088         *eth_addr = base_eth_addr;
1089         eth_addr->addr_bytes[5] = eth_dev->data->port_id;
1090
1091         vring_state = rte_zmalloc_socket(name,
1092                         sizeof(*vring_state), 0, numa_node);
1093         if (vring_state == NULL)
1094                 goto error;
1095
1096         /* now put it all together
1097          * - store queue data in internal,
1098          * - store numa_node info in ethdev data
1099          * - point eth_dev_data to internals
1100          * - and point eth_dev structure to new eth_dev_data structure
1101          */
1102         internal->dev_name = strdup(name);
1103         if (internal->dev_name == NULL)
1104                 goto error;
1105         internal->iface_name = strdup(iface_name);
1106         if (internal->iface_name == NULL)
1107                 goto error;
1108
1109         list->eth_dev = eth_dev;
1110         pthread_mutex_lock(&internal_list_lock);
1111         TAILQ_INSERT_TAIL(&internal_list, list, next);
1112         pthread_mutex_unlock(&internal_list_lock);
1113
1114         rte_spinlock_init(&vring_state->lock);
1115         vring_states[eth_dev->data->port_id] = vring_state;
1116
1117         data->dev_private = internal;
1118         data->port_id = eth_dev->data->port_id;
1119         memmove(data->name, eth_dev->data->name, sizeof(data->name));
1120         data->nb_rx_queues = queues;
1121         data->nb_tx_queues = queues;
1122         internal->max_queues = queues;
1123         data->dev_link = pmd_link;
1124         data->mac_addrs = eth_addr;
1125
1126         /* We'll replace the 'data' originally allocated by eth_dev. So the
1127          * vhost PMD resources won't be shared between multi processes.
1128          */
1129         eth_dev->data = data;
1130         eth_dev->dev_ops = &ops;
1131         eth_dev->driver = NULL;
1132         data->dev_flags =
1133                 RTE_ETH_DEV_DETACHABLE | RTE_ETH_DEV_INTR_LSC;
1134         data->kdrv = RTE_KDRV_NONE;
1135         data->drv_name = pmd_vhost_drv.driver.name;
1136         data->numa_node = numa_node;
1137
1138         /* finally assign rx and tx ops */
1139         eth_dev->rx_pkt_burst = eth_vhost_rx;
1140         eth_dev->tx_pkt_burst = eth_vhost_tx;
1141
1142         if (rte_vhost_driver_register(iface_name, flags))
1143                 goto error;
1144
1145         /* We need only one message handling thread */
1146         if (rte_atomic16_add_return(&nb_started_ports, 1) == 1) {
1147                 if (vhost_driver_session_start())
1148                         goto error;
1149         }
1150
1151         return data->port_id;
1152
1153 error:
1154         if (internal)
1155                 free(internal->dev_name);
1156         rte_free(vring_state);
1157         rte_free(eth_addr);
1158         if (eth_dev)
1159                 rte_eth_dev_release_port(eth_dev);
1160         rte_free(internal);
1161         rte_free(list);
1162         rte_free(data);
1163
1164         return -1;
1165 }
1166
1167 static inline int
1168 open_iface(const char *key __rte_unused, const char *value, void *extra_args)
1169 {
1170         const char **iface_name = extra_args;
1171
1172         if (value == NULL)
1173                 return -1;
1174
1175         *iface_name = value;
1176
1177         return 0;
1178 }
1179
1180 static inline int
1181 open_int(const char *key __rte_unused, const char *value, void *extra_args)
1182 {
1183         uint16_t *n = extra_args;
1184
1185         if (value == NULL || extra_args == NULL)
1186                 return -EINVAL;
1187
1188         *n = (uint16_t)strtoul(value, NULL, 0);
1189         if (*n == USHRT_MAX && errno == ERANGE)
1190                 return -1;
1191
1192         return 0;
1193 }
1194
1195 static int
1196 rte_pmd_vhost_probe(const char *name, const char *params)
1197 {
1198         struct rte_kvargs *kvlist = NULL;
1199         int ret = 0;
1200         char *iface_name;
1201         uint16_t queues;
1202         uint64_t flags = 0;
1203         int client_mode = 0;
1204         int dequeue_zero_copy = 0;
1205
1206         RTE_LOG(INFO, PMD, "Initializing pmd_vhost for %s\n", name);
1207
1208         kvlist = rte_kvargs_parse(params, valid_arguments);
1209         if (kvlist == NULL)
1210                 return -1;
1211
1212         if (rte_kvargs_count(kvlist, ETH_VHOST_IFACE_ARG) == 1) {
1213                 ret = rte_kvargs_process(kvlist, ETH_VHOST_IFACE_ARG,
1214                                          &open_iface, &iface_name);
1215                 if (ret < 0)
1216                         goto out_free;
1217         } else {
1218                 ret = -1;
1219                 goto out_free;
1220         }
1221
1222         if (rte_kvargs_count(kvlist, ETH_VHOST_QUEUES_ARG) == 1) {
1223                 ret = rte_kvargs_process(kvlist, ETH_VHOST_QUEUES_ARG,
1224                                          &open_int, &queues);
1225                 if (ret < 0 || queues > RTE_MAX_QUEUES_PER_PORT)
1226                         goto out_free;
1227
1228         } else
1229                 queues = 1;
1230
1231         if (rte_kvargs_count(kvlist, ETH_VHOST_CLIENT_ARG) == 1) {
1232                 ret = rte_kvargs_process(kvlist, ETH_VHOST_CLIENT_ARG,
1233                                          &open_int, &client_mode);
1234                 if (ret < 0)
1235                         goto out_free;
1236
1237                 if (client_mode)
1238                         flags |= RTE_VHOST_USER_CLIENT;
1239         }
1240
1241         if (rte_kvargs_count(kvlist, ETH_VHOST_DEQUEUE_ZERO_COPY) == 1) {
1242                 ret = rte_kvargs_process(kvlist, ETH_VHOST_DEQUEUE_ZERO_COPY,
1243                                          &open_int, &dequeue_zero_copy);
1244                 if (ret < 0)
1245                         goto out_free;
1246
1247                 if (dequeue_zero_copy)
1248                         flags |= RTE_VHOST_USER_DEQUEUE_ZERO_COPY;
1249         }
1250
1251         eth_dev_vhost_create(name, iface_name, queues, rte_socket_id(), flags);
1252
1253 out_free:
1254         rte_kvargs_free(kvlist);
1255         return ret;
1256 }
1257
1258 static int
1259 rte_pmd_vhost_remove(const char *name)
1260 {
1261         struct rte_eth_dev *eth_dev = NULL;
1262         unsigned int i;
1263
1264         RTE_LOG(INFO, PMD, "Un-Initializing pmd_vhost for %s\n", name);
1265
1266         /* find an ethdev entry */
1267         eth_dev = rte_eth_dev_allocated(name);
1268         if (eth_dev == NULL)
1269                 return -ENODEV;
1270
1271         eth_dev_stop(eth_dev);
1272
1273         eth_dev_close(eth_dev);
1274
1275         if (rte_atomic16_sub_return(&nb_started_ports, 1) == 0)
1276                 vhost_driver_session_stop();
1277
1278         rte_free(vring_states[eth_dev->data->port_id]);
1279         vring_states[eth_dev->data->port_id] = NULL;
1280
1281         for (i = 0; i < eth_dev->data->nb_rx_queues; i++)
1282                 rte_free(eth_dev->data->rx_queues[i]);
1283         for (i = 0; i < eth_dev->data->nb_tx_queues; i++)
1284                 rte_free(eth_dev->data->tx_queues[i]);
1285
1286         rte_free(eth_dev->data->mac_addrs);
1287         rte_free(eth_dev->data);
1288
1289         rte_eth_dev_release_port(eth_dev);
1290
1291         return 0;
1292 }
1293
1294 static struct rte_vdev_driver pmd_vhost_drv = {
1295         .probe = rte_pmd_vhost_probe,
1296         .remove = rte_pmd_vhost_remove,
1297 };
1298
1299 RTE_PMD_REGISTER_VDEV(net_vhost, pmd_vhost_drv);
1300 RTE_PMD_REGISTER_ALIAS(net_vhost, eth_vhost);
1301 RTE_PMD_REGISTER_PARAM_STRING(net_vhost,
1302         "iface=<ifc> "
1303         "queues=<int>");