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
  37 #include <rte_mbuf.h>
  38 #include <rte_ethdev_driver.h>
  39 #include <rte_ethdev_vdev.h>
  40 #include <rte_malloc.h>
  41 #include <rte_memcpy.h>
  42 #include <rte_bus_vdev.h>
  43 #include <rte_kvargs.h>
  44 #include <rte_vhost.h>
  45 #include <rte_spinlock.h>
  46
  47 #include "rte_eth_vhost.h"
  48
  49 enum {VIRTIO_RXQ, VIRTIO_TXQ, VIRTIO_QNUM};
  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 ETH_VHOST_IOMMU_SUPPORT         "iommu-support"
  56 #define VHOST_MAX_PKT_BURST 32
  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         ETH_VHOST_IOMMU_SUPPORT,
  64         NULL
  65 };
  66
  67 static struct ether_addr base_eth_addr = {
  68         .addr_bytes = {
  69                 0x56 /* V */,
  70                 0x48 /* H */,
  71                 0x4F /* O */,
  72                 0x53 /* S */,
  73                 0x54 /* T */,
  74                 0x00
  75         }
  76 };
  77
  78 enum vhost_xstats_pkts {
  79         VHOST_UNDERSIZE_PKT = 0,
  80         VHOST_64_PKT,
  81         VHOST_65_TO_127_PKT,
  82         VHOST_128_TO_255_PKT,
  83         VHOST_256_TO_511_PKT,
  84         VHOST_512_TO_1023_PKT,
  85         VHOST_1024_TO_1522_PKT,
  86         VHOST_1523_TO_MAX_PKT,
  87         VHOST_BROADCAST_PKT,
  88         VHOST_MULTICAST_PKT,
  89         VHOST_UNICAST_PKT,
  90         VHOST_ERRORS_PKT,
  91         VHOST_ERRORS_FRAGMENTED,
  92         VHOST_ERRORS_JABBER,
  93         VHOST_UNKNOWN_PROTOCOL,
  94         VHOST_XSTATS_MAX,
  95 };
  96
  97 struct vhost_stats {
  98         uint64_t pkts;
  99         uint64_t bytes;
 100         uint64_t missed_pkts;
 101         uint64_t xstats[VHOST_XSTATS_MAX];
 102 };
 103
 104 struct vhost_queue {
 105         int vid;
 106         rte_atomic32_t allow_queuing;
 107         rte_atomic32_t while_queuing;
 108         struct pmd_internal *internal;
 109         struct rte_mempool *mb_pool;
 110         uint16_t port;
 111         uint16_t virtqueue_id;
 112         struct vhost_stats stats;
 113 };
 114
 115 struct pmd_internal {
 116         rte_atomic32_t dev_attached;
 117         char *dev_name;
 118         char *iface_name;
 119         uint16_t max_queues;
 120         rte_atomic32_t started;
 121 };
 122
 123 struct internal_list {
 124         TAILQ_ENTRY(internal_list) next;
 125         struct rte_eth_dev *eth_dev;
 126 };
 127
 128 TAILQ_HEAD(internal_list_head, internal_list);
 129 static struct internal_list_head internal_list =
 130         TAILQ_HEAD_INITIALIZER(internal_list);
 131
 132 static pthread_mutex_t internal_list_lock = PTHREAD_MUTEX_INITIALIZER;
 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         uint16_t nb_receive = nb_bufs;
 395
 396         if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
 397                 return 0;
 398
 399         rte_atomic32_set(&r->while_queuing, 1);
 400
 401         if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
 402                 goto out;
 403
 404         /* Dequeue packets from guest TX queue */
 405         while (nb_receive) {
 406                 uint16_t nb_pkts;
 407                 uint16_t num = (uint16_t)RTE_MIN(nb_receive,
 408                                                  VHOST_MAX_PKT_BURST);
 409
 410                 nb_pkts = rte_vhost_dequeue_burst(r->vid, r->virtqueue_id,
 411                                                   r->mb_pool, &bufs[nb_rx],
 412                                                   num);
 413
 414                 nb_rx += nb_pkts;
 415                 nb_receive -= nb_pkts;
 416                 if (nb_pkts < num)
 417                         break;
 418         }
 419
 420         r->stats.pkts += nb_rx;
 421
 422         for (i = 0; likely(i < nb_rx); i++) {
 423                 bufs[i]->port = r->port;
 424                 r->stats.bytes += bufs[i]->pkt_len;
 425         }
 426
 427         vhost_update_packet_xstats(r, bufs, nb_rx);
 428
 429 out:
 430         rte_atomic32_set(&r->while_queuing, 0);
 431
 432         return nb_rx;
 433 }
 434
 435 static uint16_t
 436 eth_vhost_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 437 {
 438         struct vhost_queue *r = q;
 439         uint16_t i, nb_tx = 0;
 440         uint16_t nb_send = nb_bufs;
 441
 442         if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
 443                 return 0;
 444
 445         rte_atomic32_set(&r->while_queuing, 1);
 446
 447         if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
 448                 goto out;
 449
 450         /* Enqueue packets to guest RX queue */
 451         while (nb_send) {
 452                 uint16_t nb_pkts;
 453                 uint16_t num = (uint16_t)RTE_MIN(nb_send,
 454                                                  VHOST_MAX_PKT_BURST);
 455
 456                 nb_pkts = rte_vhost_enqueue_burst(r->vid, r->virtqueue_id,
 457                                                   &bufs[nb_tx], num);
 458
 459                 nb_tx += nb_pkts;
 460                 nb_send -= nb_pkts;
 461                 if (nb_pkts < num)
 462                         break;
 463         }
 464
 465         r->stats.pkts += nb_tx;
 466         r->stats.missed_pkts += nb_bufs - nb_tx;
 467
 468         for (i = 0; likely(i < nb_tx); i++)
 469                 r->stats.bytes += bufs[i]->pkt_len;
 470
 471         vhost_update_packet_xstats(r, bufs, nb_tx);
 472
 473         /* According to RFC2863 page42 section ifHCOutMulticastPkts and
 474          * ifHCOutBroadcastPkts, the counters "multicast" and "broadcast"
 475          * are increased when packets are not transmitted successfully.
 476          */
 477         for (i = nb_tx; i < nb_bufs; i++)
 478                 vhost_count_multicast_broadcast(r, bufs[i]);
 479
 480         for (i = 0; likely(i < nb_tx); i++)
 481                 rte_pktmbuf_free(bufs[i]);
 482 out:
 483         rte_atomic32_set(&r->while_queuing, 0);
 484
 485         return nb_tx;
 486 }
 487
 488 static int
 489 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
 490 {
 491         return 0;
 492 }
 493
 494 static inline struct internal_list *
 495 find_internal_resource(char *ifname)
 496 {
 497         int found = 0;
 498         struct internal_list *list;
 499         struct pmd_internal *internal;
 500
 501         if (ifname == NULL)
 502                 return NULL;
 503
 504         pthread_mutex_lock(&internal_list_lock);
 505
 506         TAILQ_FOREACH(list, &internal_list, next) {
 507                 internal = list->eth_dev->data->dev_private;
 508                 if (!strcmp(internal->iface_name, ifname)) {
 509                         found = 1;
 510                         break;
 511                 }
 512         }
 513
 514         pthread_mutex_unlock(&internal_list_lock);
 515
 516         if (!found)
 517                 return NULL;
 518
 519         return list;
 520 }
 521
 522 static void
 523 update_queuing_status(struct rte_eth_dev *dev)
 524 {
 525         struct pmd_internal *internal = dev->data->dev_private;
 526         struct vhost_queue *vq;
 527         unsigned int i;
 528         int allow_queuing = 1;
 529
 530         if (rte_atomic32_read(&internal->started) == 0 ||
 531             rte_atomic32_read(&internal->dev_attached) == 0)
 532                 allow_queuing = 0;
 533
 534         /* Wait until rx/tx_pkt_burst stops accessing vhost device */
 535         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 536                 vq = dev->data->rx_queues[i];
 537                 if (vq == NULL)
 538                         continue;
 539                 rte_atomic32_set(&vq->allow_queuing, allow_queuing);
 540                 while (rte_atomic32_read(&vq->while_queuing))
 541                         rte_pause();
 542         }
 543
 544         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 545                 vq = dev->data->tx_queues[i];
 546                 if (vq == NULL)
 547                         continue;
 548                 rte_atomic32_set(&vq->allow_queuing, allow_queuing);
 549                 while (rte_atomic32_read(&vq->while_queuing))
 550                         rte_pause();
 551         }
 552 }
 553
 554 static int
 555 new_device(int vid)
 556 {
 557         struct rte_eth_dev *eth_dev;
 558         struct internal_list *list;
 559         struct pmd_internal *internal;
 560         struct vhost_queue *vq;
 561         unsigned i;
 562         char ifname[PATH_MAX];
 563 #ifdef RTE_LIBRTE_VHOST_NUMA
 564         int newnode;
 565 #endif
 566
 567         rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
 568         list = find_internal_resource(ifname);
 569         if (list == NULL) {
 570                 RTE_LOG(INFO, PMD, "Invalid device name: %s\n", ifname);
 571                 return -1;
 572         }
 573
 574         eth_dev = list->eth_dev;
 575         internal = eth_dev->data->dev_private;
 576
 577 #ifdef RTE_LIBRTE_VHOST_NUMA
 578         newnode = rte_vhost_get_numa_node(vid);
 579         if (newnode >= 0)
 580                 eth_dev->data->numa_node = newnode;
 581 #endif
 582
 583         for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
 584                 vq = eth_dev->data->rx_queues[i];
 585                 if (vq == NULL)
 586                         continue;
 587                 vq->vid = vid;
 588                 vq->internal = internal;
 589                 vq->port = eth_dev->data->port_id;
 590         }
 591         for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
 592                 vq = eth_dev->data->tx_queues[i];
 593                 if (vq == NULL)
 594                         continue;
 595                 vq->vid = vid;
 596                 vq->internal = internal;
 597                 vq->port = eth_dev->data->port_id;
 598         }
 599
 600         for (i = 0; i < rte_vhost_get_vring_num(vid); i++)
 601                 rte_vhost_enable_guest_notification(vid, i, 0);
 602
 603         rte_vhost_get_mtu(vid, &eth_dev->data->mtu);
 604
 605         eth_dev->data->dev_link.link_status = ETH_LINK_UP;
 606
 607         rte_atomic32_set(&internal->dev_attached, 1);
 608         update_queuing_status(eth_dev);
 609
 610         RTE_LOG(INFO, PMD, "Vhost device %d created\n", vid);
 611
 612         _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 613
 614         return 0;
 615 }
 616
 617 static void
 618 destroy_device(int vid)
 619 {
 620         struct rte_eth_dev *eth_dev;
 621         struct pmd_internal *internal;
 622         struct vhost_queue *vq;
 623         struct internal_list *list;
 624         char ifname[PATH_MAX];
 625         unsigned i;
 626         struct rte_vhost_vring_state *state;
 627
 628         rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
 629         list = find_internal_resource(ifname);
 630         if (list == NULL) {
 631                 RTE_LOG(ERR, PMD, "Invalid interface name: %s\n", ifname);
 632                 return;
 633         }
 634         eth_dev = list->eth_dev;
 635         internal = eth_dev->data->dev_private;
 636
 637         rte_atomic32_set(&internal->dev_attached, 0);
 638         update_queuing_status(eth_dev);
 639
 640         eth_dev->data->dev_link.link_status = ETH_LINK_DOWN;
 641
 642         for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
 643                 vq = eth_dev->data->rx_queues[i];
 644                 if (vq == NULL)
 645                         continue;
 646                 vq->vid = -1;
 647         }
 648         for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
 649                 vq = eth_dev->data->tx_queues[i];
 650                 if (vq == NULL)
 651                         continue;
 652                 vq->vid = -1;
 653         }
 654
 655         state = vring_states[eth_dev->data->port_id];
 656         rte_spinlock_lock(&state->lock);
 657         for (i = 0; i <= state->max_vring; i++) {
 658                 state->cur[i] = false;
 659                 state->seen[i] = false;
 660         }
 661         state->max_vring = 0;
 662         rte_spinlock_unlock(&state->lock);
 663
 664         RTE_LOG(INFO, PMD, "Vhost device %d destroyed\n", vid);
 665
 666         _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
 667 }
 668
 669 static int
 670 vring_state_changed(int vid, uint16_t vring, int enable)
 671 {
 672         struct rte_vhost_vring_state *state;
 673         struct rte_eth_dev *eth_dev;
 674         struct internal_list *list;
 675         char ifname[PATH_MAX];
 676
 677         rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
 678         list = find_internal_resource(ifname);
 679         if (list == NULL) {
 680                 RTE_LOG(ERR, PMD, "Invalid interface name: %s\n", ifname);
 681                 return -1;
 682         }
 683
 684         eth_dev = list->eth_dev;
 685         /* won't be NULL */
 686         state = vring_states[eth_dev->data->port_id];
 687         rte_spinlock_lock(&state->lock);
 688         state->cur[vring] = enable;
 689         state->max_vring = RTE_MAX(vring, state->max_vring);
 690         rte_spinlock_unlock(&state->lock);
 691
 692         RTE_LOG(INFO, PMD, "vring%u is %s\n",
 693                         vring, enable ? "enabled" : "disabled");
 694
 695         _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_QUEUE_STATE, NULL);
 696
 697         return 0;
 698 }
 699
 700 static struct vhost_device_ops vhost_ops = {
 701         .new_device          = new_device,
 702         .destroy_device      = destroy_device,
 703         .vring_state_changed = vring_state_changed,
 704 };
 705
 706 int
 707 rte_eth_vhost_get_queue_event(uint16_t port_id,
 708                 struct rte_eth_vhost_queue_event *event)
 709 {
 710         struct rte_vhost_vring_state *state;
 711         unsigned int i;
 712         int idx;
 713
 714         if (port_id >= RTE_MAX_ETHPORTS) {
 715                 RTE_LOG(ERR, PMD, "Invalid port id\n");
 716                 return -1;
 717         }
 718
 719         state = vring_states[port_id];
 720         if (!state) {
 721                 RTE_LOG(ERR, PMD, "Unused port\n");
 722                 return -1;
 723         }
 724
 725         rte_spinlock_lock(&state->lock);
 726         for (i = 0; i <= state->max_vring; i++) {
 727                 idx = state->index++ % (state->max_vring + 1);
 728
 729                 if (state->cur[idx] != state->seen[idx]) {
 730                         state->seen[idx] = state->cur[idx];
 731                         event->queue_id = idx / 2;
 732                         event->rx = idx & 1;
 733                         event->enable = state->cur[idx];
 734                         rte_spinlock_unlock(&state->lock);
 735                         return 0;
 736                 }
 737         }
 738         rte_spinlock_unlock(&state->lock);
 739
 740         return -1;
 741 }
 742
 743 int
 744 rte_eth_vhost_get_vid_from_port_id(uint16_t port_id)
 745 {
 746         struct internal_list *list;
 747         struct rte_eth_dev *eth_dev;
 748         struct vhost_queue *vq;
 749         int vid = -1;
 750
 751         if (!rte_eth_dev_is_valid_port(port_id))
 752                 return -1;
 753
 754         pthread_mutex_lock(&internal_list_lock);
 755
 756         TAILQ_FOREACH(list, &internal_list, next) {
 757                 eth_dev = list->eth_dev;
 758                 if (eth_dev->data->port_id == port_id) {
 759                         vq = eth_dev->data->rx_queues[0];
 760                         if (vq) {
 761                                 vid = vq->vid;
 762                         }
 763                         break;
 764                 }
 765         }
 766
 767         pthread_mutex_unlock(&internal_list_lock);
 768
 769         return vid;
 770 }
 771
 772 static int
 773 eth_dev_start(struct rte_eth_dev *dev)
 774 {
 775         struct pmd_internal *internal = dev->data->dev_private;
 776
 777         rte_atomic32_set(&internal->started, 1);
 778         update_queuing_status(dev);
 779
 780         return 0;
 781 }
 782
 783 static void
 784 eth_dev_stop(struct rte_eth_dev *dev)
 785 {
 786         struct pmd_internal *internal = dev->data->dev_private;
 787
 788         rte_atomic32_set(&internal->started, 0);
 789         update_queuing_status(dev);
 790 }
 791
 792 static void
 793 eth_dev_close(struct rte_eth_dev *dev)
 794 {
 795         struct pmd_internal *internal;
 796         struct internal_list *list;
 797         unsigned int i;
 798
 799         internal = dev->data->dev_private;
 800         if (!internal)
 801                 return;
 802
 803         eth_dev_stop(dev);
 804
 805         rte_vhost_driver_unregister(internal->iface_name);
 806
 807         list = find_internal_resource(internal->iface_name);
 808         if (!list)
 809                 return;
 810
 811         pthread_mutex_lock(&internal_list_lock);
 812         TAILQ_REMOVE(&internal_list, list, next);
 813         pthread_mutex_unlock(&internal_list_lock);
 814         rte_free(list);
 815
 816         for (i = 0; i < dev->data->nb_rx_queues; i++)
 817                 rte_free(dev->data->rx_queues[i]);
 818         for (i = 0; i < dev->data->nb_tx_queues; i++)
 819                 rte_free(dev->data->tx_queues[i]);
 820
 821         rte_free(dev->data->mac_addrs);
 822         free(internal->dev_name);
 823         free(internal->iface_name);
 824         rte_free(internal);
 825
 826         dev->data->dev_private = NULL;
 827 }
 828
 829 static int
 830 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 831                    uint16_t nb_rx_desc __rte_unused,
 832                    unsigned int socket_id,
 833                    const struct rte_eth_rxconf *rx_conf __rte_unused,
 834                    struct rte_mempool *mb_pool)
 835 {
 836         struct vhost_queue *vq;
 837
 838         vq = rte_zmalloc_socket(NULL, sizeof(struct vhost_queue),
 839                         RTE_CACHE_LINE_SIZE, socket_id);
 840         if (vq == NULL) {
 841                 RTE_LOG(ERR, PMD, "Failed to allocate memory for rx queue\n");
 842                 return -ENOMEM;
 843         }
 844
 845         vq->mb_pool = mb_pool;
 846         vq->virtqueue_id = rx_queue_id * VIRTIO_QNUM + VIRTIO_TXQ;
 847         dev->data->rx_queues[rx_queue_id] = vq;
 848
 849         return 0;
 850 }
 851
 852 static int
 853 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 854                    uint16_t nb_tx_desc __rte_unused,
 855                    unsigned int socket_id,
 856                    const struct rte_eth_txconf *tx_conf __rte_unused)
 857 {
 858         struct vhost_queue *vq;
 859
 860         vq = rte_zmalloc_socket(NULL, sizeof(struct vhost_queue),
 861                         RTE_CACHE_LINE_SIZE, socket_id);
 862         if (vq == NULL) {
 863                 RTE_LOG(ERR, PMD, "Failed to allocate memory for tx queue\n");
 864                 return -ENOMEM;
 865         }
 866
 867         vq->virtqueue_id = tx_queue_id * VIRTIO_QNUM + VIRTIO_RXQ;
 868         dev->data->tx_queues[tx_queue_id] = vq;
 869
 870         return 0;
 871 }
 872
 873 static void
 874 eth_dev_info(struct rte_eth_dev *dev,
 875              struct rte_eth_dev_info *dev_info)
 876 {
 877         struct pmd_internal *internal;
 878
 879         internal = dev->data->dev_private;
 880         if (internal == NULL) {
 881                 RTE_LOG(ERR, PMD, "Invalid device specified\n");
 882                 return;
 883         }
 884
 885         dev_info->max_mac_addrs = 1;
 886         dev_info->max_rx_pktlen = (uint32_t)-1;
 887         dev_info->max_rx_queues = internal->max_queues;
 888         dev_info->max_tx_queues = internal->max_queues;
 889         dev_info->min_rx_bufsize = 0;
 890 }
 891
 892 static int
 893 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 894 {
 895         unsigned i;
 896         unsigned long rx_total = 0, tx_total = 0, tx_missed_total = 0;
 897         unsigned long rx_total_bytes = 0, tx_total_bytes = 0;
 898         struct vhost_queue *vq;
 899
 900         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 901                         i < dev->data->nb_rx_queues; i++) {
 902                 if (dev->data->rx_queues[i] == NULL)
 903                         continue;
 904                 vq = dev->data->rx_queues[i];
 905                 stats->q_ipackets[i] = vq->stats.pkts;
 906                 rx_total += stats->q_ipackets[i];
 907
 908                 stats->q_ibytes[i] = vq->stats.bytes;
 909                 rx_total_bytes += stats->q_ibytes[i];
 910         }
 911
 912         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 913                         i < dev->data->nb_tx_queues; i++) {
 914                 if (dev->data->tx_queues[i] == NULL)
 915                         continue;
 916                 vq = dev->data->tx_queues[i];
 917                 stats->q_opackets[i] = vq->stats.pkts;
 918                 tx_missed_total += vq->stats.missed_pkts;
 919                 tx_total += stats->q_opackets[i];
 920
 921                 stats->q_obytes[i] = vq->stats.bytes;
 922                 tx_total_bytes += stats->q_obytes[i];
 923         }
 924
 925         stats->ipackets = rx_total;
 926         stats->opackets = tx_total;
 927         stats->oerrors = tx_missed_total;
 928         stats->ibytes = rx_total_bytes;
 929         stats->obytes = tx_total_bytes;
 930
 931         return 0;
 932 }
 933
 934 static void
 935 eth_stats_reset(struct rte_eth_dev *dev)
 936 {
 937         struct vhost_queue *vq;
 938         unsigned i;
 939
 940         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 941                 if (dev->data->rx_queues[i] == NULL)
 942                         continue;
 943                 vq = dev->data->rx_queues[i];
 944                 vq->stats.pkts = 0;
 945                 vq->stats.bytes = 0;
 946         }
 947         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 948                 if (dev->data->tx_queues[i] == NULL)
 949                         continue;
 950                 vq = dev->data->tx_queues[i];
 951                 vq->stats.pkts = 0;
 952                 vq->stats.bytes = 0;
 953                 vq->stats.missed_pkts = 0;
 954         }
 955 }
 956
 957 static void
 958 eth_queue_release(void *q)
 959 {
 960         rte_free(q);
 961 }
 962
 963 static int
 964 eth_tx_done_cleanup(void *txq __rte_unused, uint32_t free_cnt __rte_unused)
 965 {
 966         /*
 967          * vHost does not hang onto mbuf. eth_vhost_tx() copies packet data
 968          * and releases mbuf, so nothing to cleanup.
 969          */
 970         return 0;
 971 }
 972
 973 static int
 974 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 975                 int wait_to_complete __rte_unused)
 976 {
 977         return 0;
 978 }
 979
 980 static uint32_t
 981 eth_rx_queue_count(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 982 {
 983         struct vhost_queue *vq;
 984
 985         vq = dev->data->rx_queues[rx_queue_id];
 986         if (vq == NULL)
 987                 return 0;
 988
 989         return rte_vhost_rx_queue_count(vq->vid, vq->virtqueue_id);
 990 }
 991
 992 static const struct eth_dev_ops ops = {
 993         .dev_start = eth_dev_start,
 994         .dev_stop = eth_dev_stop,
 995         .dev_close = eth_dev_close,
 996         .dev_configure = eth_dev_configure,
 997         .dev_infos_get = eth_dev_info,
 998         .rx_queue_setup = eth_rx_queue_setup,
 999         .tx_queue_setup = eth_tx_queue_setup,
1000         .rx_queue_release = eth_queue_release,
1001         .tx_queue_release = eth_queue_release,
1002         .tx_done_cleanup = eth_tx_done_cleanup,
1003         .rx_queue_count = eth_rx_queue_count,
1004         .link_update = eth_link_update,
1005         .stats_get = eth_stats_get,
1006         .stats_reset = eth_stats_reset,
1007         .xstats_reset = vhost_dev_xstats_reset,
1008         .xstats_get = vhost_dev_xstats_get,
1009         .xstats_get_names = vhost_dev_xstats_get_names,
1010 };
1011
1012 static struct rte_vdev_driver pmd_vhost_drv;
1013
1014 static int
1015 eth_dev_vhost_create(struct rte_vdev_device *dev, char *iface_name,
1016         int16_t queues, const unsigned int numa_node, uint64_t flags)
1017 {
1018         const char *name = rte_vdev_device_name(dev);
1019         struct rte_eth_dev_data *data = NULL;
1020         struct pmd_internal *internal = NULL;
1021         struct rte_eth_dev *eth_dev = NULL;
1022         struct ether_addr *eth_addr = NULL;
1023         struct rte_vhost_vring_state *vring_state = NULL;
1024         struct internal_list *list = NULL;
1025
1026         RTE_LOG(INFO, PMD, "Creating VHOST-USER backend on numa socket %u\n",
1027                 numa_node);
1028
1029         /* now do all data allocation - for eth_dev structure and internal
1030          * (private) data
1031          */
1032         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
1033         if (data == NULL)
1034                 goto error;
1035
1036         list = rte_zmalloc_socket(name, sizeof(*list), 0, numa_node);
1037         if (list == NULL)
1038                 goto error;
1039
1040         /* reserve an ethdev entry */
1041         eth_dev = rte_eth_vdev_allocate(dev, sizeof(*internal));
1042         if (eth_dev == NULL)
1043                 goto error;
1044
1045         eth_addr = rte_zmalloc_socket(name, sizeof(*eth_addr), 0, numa_node);
1046         if (eth_addr == NULL)
1047                 goto error;
1048         *eth_addr = base_eth_addr;
1049         eth_addr->addr_bytes[5] = eth_dev->data->port_id;
1050
1051         vring_state = rte_zmalloc_socket(name,
1052                         sizeof(*vring_state), 0, numa_node);
1053         if (vring_state == NULL)
1054                 goto error;
1055
1056         /* now put it all together
1057          * - store queue data in internal,
1058          * - point eth_dev_data to internals
1059          * - and point eth_dev structure to new eth_dev_data structure
1060          */
1061         internal = eth_dev->data->dev_private;
1062         internal->dev_name = strdup(name);
1063         if (internal->dev_name == NULL)
1064                 goto error;
1065         internal->iface_name = strdup(iface_name);
1066         if (internal->iface_name == NULL)
1067                 goto error;
1068
1069         list->eth_dev = eth_dev;
1070         pthread_mutex_lock(&internal_list_lock);
1071         TAILQ_INSERT_TAIL(&internal_list, list, next);
1072         pthread_mutex_unlock(&internal_list_lock);
1073
1074         rte_spinlock_init(&vring_state->lock);
1075         vring_states[eth_dev->data->port_id] = vring_state;
1076
1077         /* We'll replace the 'data' originally allocated by eth_dev. So the
1078          * vhost PMD resources won't be shared between multi processes.
1079          */
1080         rte_memcpy(data, eth_dev->data, sizeof(*data));
1081         eth_dev->data = data;
1082
1083         data->nb_rx_queues = queues;
1084         data->nb_tx_queues = queues;
1085         internal->max_queues = queues;
1086         data->dev_link = pmd_link;
1087         data->mac_addrs = eth_addr;
1088         data->dev_flags = RTE_ETH_DEV_INTR_LSC;
1089
1090         eth_dev->dev_ops = &ops;
1091
1092         /* finally assign rx and tx ops */
1093         eth_dev->rx_pkt_burst = eth_vhost_rx;
1094         eth_dev->tx_pkt_burst = eth_vhost_tx;
1095
1096         if (rte_vhost_driver_register(iface_name, flags))
1097                 goto error;
1098
1099         if (rte_vhost_driver_callback_register(iface_name, &vhost_ops) < 0) {
1100                 RTE_LOG(ERR, PMD, "Can't register callbacks\n");
1101                 goto error;
1102         }
1103
1104         if (rte_vhost_driver_start(iface_name) < 0) {
1105                 RTE_LOG(ERR, PMD, "Failed to start driver for %s\n",
1106                         iface_name);
1107                 goto error;
1108         }
1109
1110         return data->port_id;
1111
1112 error:
1113         if (internal) {
1114                 free(internal->iface_name);
1115                 free(internal->dev_name);
1116         }
1117         rte_free(vring_state);
1118         rte_free(eth_addr);
1119         if (eth_dev)
1120                 rte_eth_dev_release_port(eth_dev);
1121         rte_free(internal);
1122         rte_free(list);
1123         rte_free(data);
1124
1125         return -1;
1126 }
1127
1128 static inline int
1129 open_iface(const char *key __rte_unused, const char *value, void *extra_args)
1130 {
1131         const char **iface_name = extra_args;
1132
1133         if (value == NULL)
1134                 return -1;
1135
1136         *iface_name = value;
1137
1138         return 0;
1139 }
1140
1141 static inline int
1142 open_int(const char *key __rte_unused, const char *value, void *extra_args)
1143 {
1144         uint16_t *n = extra_args;
1145
1146         if (value == NULL || extra_args == NULL)
1147                 return -EINVAL;
1148
1149         *n = (uint16_t)strtoul(value, NULL, 0);
1150         if (*n == USHRT_MAX && errno == ERANGE)
1151                 return -1;
1152
1153         return 0;
1154 }
1155
1156 static int
1157 rte_pmd_vhost_probe(struct rte_vdev_device *dev)
1158 {
1159         struct rte_kvargs *kvlist = NULL;
1160         int ret = 0;
1161         char *iface_name;
1162         uint16_t queues;
1163         uint64_t flags = 0;
1164         int client_mode = 0;
1165         int dequeue_zero_copy = 0;
1166         int iommu_support = 0;
1167
1168         RTE_LOG(INFO, PMD, "Initializing pmd_vhost for %s\n",
1169                 rte_vdev_device_name(dev));
1170
1171         kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_arguments);
1172         if (kvlist == NULL)
1173                 return -1;
1174
1175         if (rte_kvargs_count(kvlist, ETH_VHOST_IFACE_ARG) == 1) {
1176                 ret = rte_kvargs_process(kvlist, ETH_VHOST_IFACE_ARG,
1177                                          &open_iface, &iface_name);
1178                 if (ret < 0)
1179                         goto out_free;
1180         } else {
1181                 ret = -1;
1182                 goto out_free;
1183         }
1184
1185         if (rte_kvargs_count(kvlist, ETH_VHOST_QUEUES_ARG) == 1) {
1186                 ret = rte_kvargs_process(kvlist, ETH_VHOST_QUEUES_ARG,
1187                                          &open_int, &queues);
1188                 if (ret < 0 || queues > RTE_MAX_QUEUES_PER_PORT)
1189                         goto out_free;
1190
1191         } else
1192                 queues = 1;
1193
1194         if (rte_kvargs_count(kvlist, ETH_VHOST_CLIENT_ARG) == 1) {
1195                 ret = rte_kvargs_process(kvlist, ETH_VHOST_CLIENT_ARG,
1196                                          &open_int, &client_mode);
1197                 if (ret < 0)
1198                         goto out_free;
1199
1200                 if (client_mode)
1201                         flags |= RTE_VHOST_USER_CLIENT;
1202         }
1203
1204         if (rte_kvargs_count(kvlist, ETH_VHOST_DEQUEUE_ZERO_COPY) == 1) {
1205                 ret = rte_kvargs_process(kvlist, ETH_VHOST_DEQUEUE_ZERO_COPY,
1206                                          &open_int, &dequeue_zero_copy);
1207                 if (ret < 0)
1208                         goto out_free;
1209
1210                 if (dequeue_zero_copy)
1211                         flags |= RTE_VHOST_USER_DEQUEUE_ZERO_COPY;
1212         }
1213
1214         if (rte_kvargs_count(kvlist, ETH_VHOST_IOMMU_SUPPORT) == 1) {
1215                 ret = rte_kvargs_process(kvlist, ETH_VHOST_IOMMU_SUPPORT,
1216                                          &open_int, &iommu_support);
1217                 if (ret < 0)
1218                         goto out_free;
1219
1220                 if (iommu_support)
1221                         flags |= RTE_VHOST_USER_IOMMU_SUPPORT;
1222         }
1223
1224         if (dev->device.numa_node == SOCKET_ID_ANY)
1225                 dev->device.numa_node = rte_socket_id();
1226
1227         eth_dev_vhost_create(dev, iface_name, queues, dev->device.numa_node,
1228                 flags);
1229
1230 out_free:
1231         rte_kvargs_free(kvlist);
1232         return ret;
1233 }
1234
1235 static int
1236 rte_pmd_vhost_remove(struct rte_vdev_device *dev)
1237 {
1238         const char *name;
1239         struct rte_eth_dev *eth_dev = NULL;
1240
1241         name = rte_vdev_device_name(dev);
1242         RTE_LOG(INFO, PMD, "Un-Initializing pmd_vhost for %s\n", name);
1243
1244         /* find an ethdev entry */
1245         eth_dev = rte_eth_dev_allocated(name);
1246         if (eth_dev == NULL)
1247                 return -ENODEV;
1248
1249         eth_dev_close(eth_dev);
1250
1251         rte_free(vring_states[eth_dev->data->port_id]);
1252         vring_states[eth_dev->data->port_id] = NULL;
1253
1254         rte_free(eth_dev->data);
1255
1256         rte_eth_dev_release_port(eth_dev);
1257
1258         return 0;
1259 }
1260
1261 static struct rte_vdev_driver pmd_vhost_drv = {
1262         .probe = rte_pmd_vhost_probe,
1263         .remove = rte_pmd_vhost_remove,
1264 };
1265
1266 RTE_PMD_REGISTER_VDEV(net_vhost, pmd_vhost_drv);
1267 RTE_PMD_REGISTER_ALIAS(net_vhost, eth_vhost);
1268 RTE_PMD_REGISTER_PARAM_STRING(net_vhost,
1269         "iface=<ifc> "
1270         "queues=<int>");