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.h>
  39 #include <rte_malloc.h>
  40 #include <rte_memcpy.h>
  41 #include <rte_vdev.h>
  42 #include <rte_kvargs.h>
  43 #include <rte_virtio_net.h>
  44 #include <rte_spinlock.h>
  45
  46 #include "rte_eth_vhost.h"
  47
  48 enum {VIRTIO_RXQ, VIRTIO_TXQ, VIRTIO_QNUM};
  49
  50 #define ETH_VHOST_IFACE_ARG             "iface"
  51 #define ETH_VHOST_QUEUES_ARG            "queues"
  52 #define ETH_VHOST_CLIENT_ARG            "client"
  53 #define ETH_VHOST_DEQUEUE_ZERO_COPY     "dequeue-zero-copy"
  54 #define VHOST_MAX_PKT_BURST 32
  55
  56 static const char *valid_arguments[] = {
  57         ETH_VHOST_IFACE_ARG,
  58         ETH_VHOST_QUEUES_ARG,
  59         ETH_VHOST_CLIENT_ARG,
  60         ETH_VHOST_DEQUEUE_ZERO_COPY,
  61         NULL
  62 };
  63
  64 static struct ether_addr base_eth_addr = {
  65         .addr_bytes = {
  66                 0x56 /* V */,
  67                 0x48 /* H */,
  68                 0x4F /* O */,
  69                 0x53 /* S */,
  70                 0x54 /* T */,
  71                 0x00
  72         }
  73 };
  74
  75 enum vhost_xstats_pkts {
  76         VHOST_UNDERSIZE_PKT = 0,
  77         VHOST_64_PKT,
  78         VHOST_65_TO_127_PKT,
  79         VHOST_128_TO_255_PKT,
  80         VHOST_256_TO_511_PKT,
  81         VHOST_512_TO_1023_PKT,
  82         VHOST_1024_TO_1522_PKT,
  83         VHOST_1523_TO_MAX_PKT,
  84         VHOST_BROADCAST_PKT,
  85         VHOST_MULTICAST_PKT,
  86         VHOST_UNICAST_PKT,
  87         VHOST_ERRORS_PKT,
  88         VHOST_ERRORS_FRAGMENTED,
  89         VHOST_ERRORS_JABBER,
  90         VHOST_UNKNOWN_PROTOCOL,
  91         VHOST_XSTATS_MAX,
  92 };
  93
  94 struct vhost_stats {
  95         uint64_t pkts;
  96         uint64_t bytes;
  97         uint64_t missed_pkts;
  98         uint64_t xstats[VHOST_XSTATS_MAX];
  99 };
 100
 101 struct vhost_queue {
 102         int vid;
 103         rte_atomic32_t allow_queuing;
 104         rte_atomic32_t while_queuing;
 105         struct pmd_internal *internal;
 106         struct rte_mempool *mb_pool;
 107         uint8_t port;
 108         uint16_t virtqueue_id;
 109         struct vhost_stats stats;
 110 };
 111
 112 struct pmd_internal {
 113         rte_atomic32_t dev_attached;
 114         char *dev_name;
 115         char *iface_name;
 116         uint16_t max_queues;
 117         rte_atomic32_t started;
 118 };
 119
 120 struct internal_list {
 121         TAILQ_ENTRY(internal_list) next;
 122         struct rte_eth_dev *eth_dev;
 123 };
 124
 125 TAILQ_HEAD(internal_list_head, internal_list);
 126 static struct internal_list_head internal_list =
 127         TAILQ_HEAD_INITIALIZER(internal_list);
 128
 129 static pthread_mutex_t internal_list_lock = PTHREAD_MUTEX_INITIALIZER;
 130
 131 static rte_atomic16_t nb_started_ports;
 132 static pthread_t session_th;
 133
 134 static struct rte_eth_link pmd_link = {
 135                 .link_speed = 10000,
 136                 .link_duplex = ETH_LINK_FULL_DUPLEX,
 137                 .link_status = ETH_LINK_DOWN
 138 };
 139
 140 struct rte_vhost_vring_state {
 141         rte_spinlock_t lock;
 142
 143         bool cur[RTE_MAX_QUEUES_PER_PORT * 2];
 144         bool seen[RTE_MAX_QUEUES_PER_PORT * 2];
 145         unsigned int index;
 146         unsigned int max_vring;
 147 };
 148
 149 static struct rte_vhost_vring_state *vring_states[RTE_MAX_ETHPORTS];
 150
 151 #define VHOST_XSTATS_NAME_SIZE 64
 152
 153 struct vhost_xstats_name_off {
 154         char name[VHOST_XSTATS_NAME_SIZE];
 155         uint64_t offset;
 156 };
 157
 158 /* [rx]_is prepended to the name string here */
 159 static const struct vhost_xstats_name_off vhost_rxport_stat_strings[] = {
 160         {"good_packets",
 161          offsetof(struct vhost_queue, stats.pkts)},
 162         {"total_bytes",
 163          offsetof(struct vhost_queue, stats.bytes)},
 164         {"missed_pkts",
 165          offsetof(struct vhost_queue, stats.missed_pkts)},
 166         {"broadcast_packets",
 167          offsetof(struct vhost_queue, stats.xstats[VHOST_BROADCAST_PKT])},
 168         {"multicast_packets",
 169          offsetof(struct vhost_queue, stats.xstats[VHOST_MULTICAST_PKT])},
 170         {"unicast_packets",
 171          offsetof(struct vhost_queue, stats.xstats[VHOST_UNICAST_PKT])},
 172          {"undersize_packets",
 173          offsetof(struct vhost_queue, stats.xstats[VHOST_UNDERSIZE_PKT])},
 174         {"size_64_packets",
 175          offsetof(struct vhost_queue, stats.xstats[VHOST_64_PKT])},
 176         {"size_65_to_127_packets",
 177          offsetof(struct vhost_queue, stats.xstats[VHOST_65_TO_127_PKT])},
 178         {"size_128_to_255_packets",
 179          offsetof(struct vhost_queue, stats.xstats[VHOST_128_TO_255_PKT])},
 180         {"size_256_to_511_packets",
 181          offsetof(struct vhost_queue, stats.xstats[VHOST_256_TO_511_PKT])},
 182         {"size_512_to_1023_packets",
 183          offsetof(struct vhost_queue, stats.xstats[VHOST_512_TO_1023_PKT])},
 184         {"size_1024_to_1522_packets",
 185          offsetof(struct vhost_queue, stats.xstats[VHOST_1024_TO_1522_PKT])},
 186         {"size_1523_to_max_packets",
 187          offsetof(struct vhost_queue, stats.xstats[VHOST_1523_TO_MAX_PKT])},
 188         {"errors_with_bad_CRC",
 189          offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_PKT])},
 190         {"fragmented_errors",
 191          offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_FRAGMENTED])},
 192         {"jabber_errors",
 193          offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_JABBER])},
 194         {"unknown_protos_packets",
 195          offsetof(struct vhost_queue, stats.xstats[VHOST_UNKNOWN_PROTOCOL])},
 196 };
 197
 198 /* [tx]_ is prepended to the name string here */
 199 static const struct vhost_xstats_name_off vhost_txport_stat_strings[] = {
 200         {"good_packets",
 201          offsetof(struct vhost_queue, stats.pkts)},
 202         {"total_bytes",
 203          offsetof(struct vhost_queue, stats.bytes)},
 204         {"missed_pkts",
 205          offsetof(struct vhost_queue, stats.missed_pkts)},
 206         {"broadcast_packets",
 207          offsetof(struct vhost_queue, stats.xstats[VHOST_BROADCAST_PKT])},
 208         {"multicast_packets",
 209          offsetof(struct vhost_queue, stats.xstats[VHOST_MULTICAST_PKT])},
 210         {"unicast_packets",
 211          offsetof(struct vhost_queue, stats.xstats[VHOST_UNICAST_PKT])},
 212         {"undersize_packets",
 213          offsetof(struct vhost_queue, stats.xstats[VHOST_UNDERSIZE_PKT])},
 214         {"size_64_packets",
 215          offsetof(struct vhost_queue, stats.xstats[VHOST_64_PKT])},
 216         {"size_65_to_127_packets",
 217          offsetof(struct vhost_queue, stats.xstats[VHOST_65_TO_127_PKT])},
 218         {"size_128_to_255_packets",
 219          offsetof(struct vhost_queue, stats.xstats[VHOST_128_TO_255_PKT])},
 220         {"size_256_to_511_packets",
 221          offsetof(struct vhost_queue, stats.xstats[VHOST_256_TO_511_PKT])},
 222         {"size_512_to_1023_packets",
 223          offsetof(struct vhost_queue, stats.xstats[VHOST_512_TO_1023_PKT])},
 224         {"size_1024_to_1522_packets",
 225          offsetof(struct vhost_queue, stats.xstats[VHOST_1024_TO_1522_PKT])},
 226         {"size_1523_to_max_packets",
 227          offsetof(struct vhost_queue, stats.xstats[VHOST_1523_TO_MAX_PKT])},
 228         {"errors_with_bad_CRC",
 229          offsetof(struct vhost_queue, stats.xstats[VHOST_ERRORS_PKT])},
 230 };
 231
 232 #define VHOST_NB_XSTATS_RXPORT (sizeof(vhost_rxport_stat_strings) / \
 233                                 sizeof(vhost_rxport_stat_strings[0]))
 234
 235 #define VHOST_NB_XSTATS_TXPORT (sizeof(vhost_txport_stat_strings) / \
 236                                 sizeof(vhost_txport_stat_strings[0]))
 237
 238 static void
 239 vhost_dev_xstats_reset(struct rte_eth_dev *dev)
 240 {
 241         struct vhost_queue *vq = NULL;
 242         unsigned int i = 0;
 243
 244         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 245                 vq = dev->data->rx_queues[i];
 246                 if (!vq)
 247                         continue;
 248                 memset(&vq->stats, 0, sizeof(vq->stats));
 249         }
 250         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 251                 vq = dev->data->tx_queues[i];
 252                 if (!vq)
 253                         continue;
 254                 memset(&vq->stats, 0, sizeof(vq->stats));
 255         }
 256 }
 257
 258 static int
 259 vhost_dev_xstats_get_names(struct rte_eth_dev *dev __rte_unused,
 260                            struct rte_eth_xstat_name *xstats_names,
 261                            unsigned int limit __rte_unused)
 262 {
 263         unsigned int t = 0;
 264         int count = 0;
 265         int nstats = VHOST_NB_XSTATS_RXPORT + VHOST_NB_XSTATS_TXPORT;
 266
 267         if (!xstats_names)
 268                 return nstats;
 269         for (t = 0; t < VHOST_NB_XSTATS_RXPORT; t++) {
 270                 snprintf(xstats_names[count].name,
 271                          sizeof(xstats_names[count].name),
 272                          "rx_%s", vhost_rxport_stat_strings[t].name);
 273                 count++;
 274         }
 275         for (t = 0; t < VHOST_NB_XSTATS_TXPORT; t++) {
 276                 snprintf(xstats_names[count].name,
 277                          sizeof(xstats_names[count].name),
 278                          "tx_%s", vhost_txport_stat_strings[t].name);
 279                 count++;
 280         }
 281         return count;
 282 }
 283
 284 static int
 285 vhost_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
 286                      unsigned int n)
 287 {
 288         unsigned int i;
 289         unsigned int t;
 290         unsigned int count = 0;
 291         struct vhost_queue *vq = NULL;
 292         unsigned int nxstats = VHOST_NB_XSTATS_RXPORT + VHOST_NB_XSTATS_TXPORT;
 293
 294         if (n < nxstats)
 295                 return nxstats;
 296
 297         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 298                 vq = dev->data->rx_queues[i];
 299                 if (!vq)
 300                         continue;
 301                 vq->stats.xstats[VHOST_UNICAST_PKT] = vq->stats.pkts
 302                                 - (vq->stats.xstats[VHOST_BROADCAST_PKT]
 303                                 + vq->stats.xstats[VHOST_MULTICAST_PKT]);
 304         }
 305         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 306                 vq = dev->data->tx_queues[i];
 307                 if (!vq)
 308                         continue;
 309                 vq->stats.xstats[VHOST_UNICAST_PKT] = vq->stats.pkts
 310                                 + vq->stats.missed_pkts
 311                                 - (vq->stats.xstats[VHOST_BROADCAST_PKT]
 312                                 + vq->stats.xstats[VHOST_MULTICAST_PKT]);
 313         }
 314         for (t = 0; t < VHOST_NB_XSTATS_RXPORT; t++) {
 315                 xstats[count].value = 0;
 316                 for (i = 0; i < dev->data->nb_rx_queues; i++) {
 317                         vq = dev->data->rx_queues[i];
 318                         if (!vq)
 319                                 continue;
 320                         xstats[count].value +=
 321                                 *(uint64_t *)(((char *)vq)
 322                                 + vhost_rxport_stat_strings[t].offset);
 323                 }
 324                 xstats[count].id = count;
 325                 count++;
 326         }
 327         for (t = 0; t < VHOST_NB_XSTATS_TXPORT; t++) {
 328                 xstats[count].value = 0;
 329                 for (i = 0; i < dev->data->nb_tx_queues; i++) {
 330                         vq = dev->data->tx_queues[i];
 331                         if (!vq)
 332                                 continue;
 333                         xstats[count].value +=
 334                                 *(uint64_t *)(((char *)vq)
 335                                 + vhost_txport_stat_strings[t].offset);
 336                 }
 337                 xstats[count].id = count;
 338                 count++;
 339         }
 340         return count;
 341 }
 342
 343 static inline void
 344 vhost_count_multicast_broadcast(struct vhost_queue *vq,
 345                                 struct rte_mbuf *mbuf)
 346 {
 347         struct ether_addr *ea = NULL;
 348         struct vhost_stats *pstats = &vq->stats;
 349
 350         ea = rte_pktmbuf_mtod(mbuf, struct ether_addr *);
 351         if (is_multicast_ether_addr(ea)) {
 352                 if (is_broadcast_ether_addr(ea))
 353                         pstats->xstats[VHOST_BROADCAST_PKT]++;
 354                 else
 355                         pstats->xstats[VHOST_MULTICAST_PKT]++;
 356         }
 357 }
 358
 359 static void
 360 vhost_update_packet_xstats(struct vhost_queue *vq,
 361                            struct rte_mbuf **bufs,
 362                            uint16_t count)
 363 {
 364         uint32_t pkt_len = 0;
 365         uint64_t i = 0;
 366         uint64_t index;
 367         struct vhost_stats *pstats = &vq->stats;
 368
 369         for (i = 0; i < count ; i++) {
 370                 pkt_len = bufs[i]->pkt_len;
 371                 if (pkt_len == 64) {
 372                         pstats->xstats[VHOST_64_PKT]++;
 373                 } else if (pkt_len > 64 && pkt_len < 1024) {
 374                         index = (sizeof(pkt_len) * 8)
 375                                 - __builtin_clz(pkt_len) - 5;
 376                         pstats->xstats[index]++;
 377                 } else {
 378                         if (pkt_len < 64)
 379                                 pstats->xstats[VHOST_UNDERSIZE_PKT]++;
 380                         else if (pkt_len <= 1522)
 381                                 pstats->xstats[VHOST_1024_TO_1522_PKT]++;
 382                         else if (pkt_len > 1522)
 383                                 pstats->xstats[VHOST_1523_TO_MAX_PKT]++;
 384                 }
 385                 vhost_count_multicast_broadcast(vq, bufs[i]);
 386         }
 387 }
 388
 389 static uint16_t
 390 eth_vhost_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
 391 {
 392         struct vhost_queue *r = q;
 393         uint16_t i, nb_rx = 0;
 394         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, "New connection established\n");
 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, "Connection closed\n");
 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(uint8_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(uint8_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 void *
 773 vhost_driver_session(void *param __rte_unused)
 774 {
 775         /* start event handling */
 776         rte_vhost_driver_session_start();
 777
 778         return NULL;
 779 }
 780
 781 static int
 782 vhost_driver_session_start(void)
 783 {
 784         int ret;
 785
 786         ret = pthread_create(&session_th,
 787                         NULL, vhost_driver_session, NULL);
 788         if (ret)
 789                 RTE_LOG(ERR, PMD, "Can't create a thread\n");
 790
 791         return ret;
 792 }
 793
 794 static void
 795 vhost_driver_session_stop(void)
 796 {
 797         int ret;
 798
 799         ret = pthread_cancel(session_th);
 800         if (ret)
 801                 RTE_LOG(ERR, PMD, "Can't cancel the thread\n");
 802
 803         ret = pthread_join(session_th, NULL);
 804         if (ret)
 805                 RTE_LOG(ERR, PMD, "Can't join the thread\n");
 806 }
 807
 808 static int
 809 eth_dev_start(struct rte_eth_dev *dev)
 810 {
 811         struct pmd_internal *internal = dev->data->dev_private;
 812
 813         rte_atomic32_set(&internal->started, 1);
 814         update_queuing_status(dev);
 815
 816         return 0;
 817 }
 818
 819 static void
 820 eth_dev_stop(struct rte_eth_dev *dev)
 821 {
 822         struct pmd_internal *internal = dev->data->dev_private;
 823
 824         rte_atomic32_set(&internal->started, 0);
 825         update_queuing_status(dev);
 826 }
 827
 828 static void
 829 eth_dev_close(struct rte_eth_dev *dev)
 830 {
 831         struct pmd_internal *internal;
 832         struct internal_list *list;
 833
 834         internal = dev->data->dev_private;
 835         if (!internal)
 836                 return;
 837
 838         rte_vhost_driver_unregister(internal->iface_name);
 839
 840         list = find_internal_resource(internal->iface_name);
 841         if (!list)
 842                 return;
 843
 844         pthread_mutex_lock(&internal_list_lock);
 845         TAILQ_REMOVE(&internal_list, list, next);
 846         pthread_mutex_unlock(&internal_list_lock);
 847         rte_free(list);
 848
 849         free(internal->dev_name);
 850         free(internal->iface_name);
 851         rte_free(internal);
 852 }
 853
 854 static int
 855 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
 856                    uint16_t nb_rx_desc __rte_unused,
 857                    unsigned int socket_id,
 858                    const struct rte_eth_rxconf *rx_conf __rte_unused,
 859                    struct rte_mempool *mb_pool)
 860 {
 861         struct vhost_queue *vq;
 862
 863         vq = rte_zmalloc_socket(NULL, sizeof(struct vhost_queue),
 864                         RTE_CACHE_LINE_SIZE, socket_id);
 865         if (vq == NULL) {
 866                 RTE_LOG(ERR, PMD, "Failed to allocate memory for rx queue\n");
 867                 return -ENOMEM;
 868         }
 869
 870         vq->mb_pool = mb_pool;
 871         vq->virtqueue_id = rx_queue_id * VIRTIO_QNUM + VIRTIO_TXQ;
 872         dev->data->rx_queues[rx_queue_id] = vq;
 873
 874         return 0;
 875 }
 876
 877 static int
 878 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
 879                    uint16_t nb_tx_desc __rte_unused,
 880                    unsigned int socket_id,
 881                    const struct rte_eth_txconf *tx_conf __rte_unused)
 882 {
 883         struct vhost_queue *vq;
 884
 885         vq = rte_zmalloc_socket(NULL, sizeof(struct vhost_queue),
 886                         RTE_CACHE_LINE_SIZE, socket_id);
 887         if (vq == NULL) {
 888                 RTE_LOG(ERR, PMD, "Failed to allocate memory for tx queue\n");
 889                 return -ENOMEM;
 890         }
 891
 892         vq->virtqueue_id = tx_queue_id * VIRTIO_QNUM + VIRTIO_RXQ;
 893         dev->data->tx_queues[tx_queue_id] = vq;
 894
 895         return 0;
 896 }
 897
 898 static void
 899 eth_dev_info(struct rte_eth_dev *dev,
 900              struct rte_eth_dev_info *dev_info)
 901 {
 902         struct pmd_internal *internal;
 903
 904         internal = dev->data->dev_private;
 905         if (internal == NULL) {
 906                 RTE_LOG(ERR, PMD, "Invalid device specified\n");
 907                 return;
 908         }
 909
 910         dev_info->max_mac_addrs = 1;
 911         dev_info->max_rx_pktlen = (uint32_t)-1;
 912         dev_info->max_rx_queues = internal->max_queues;
 913         dev_info->max_tx_queues = internal->max_queues;
 914         dev_info->min_rx_bufsize = 0;
 915 }
 916
 917 static void
 918 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 919 {
 920         unsigned i;
 921         unsigned long rx_total = 0, tx_total = 0, tx_missed_total = 0;
 922         unsigned long rx_total_bytes = 0, tx_total_bytes = 0;
 923         struct vhost_queue *vq;
 924
 925         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 926                         i < dev->data->nb_rx_queues; i++) {
 927                 if (dev->data->rx_queues[i] == NULL)
 928                         continue;
 929                 vq = dev->data->rx_queues[i];
 930                 stats->q_ipackets[i] = vq->stats.pkts;
 931                 rx_total += stats->q_ipackets[i];
 932
 933                 stats->q_ibytes[i] = vq->stats.bytes;
 934                 rx_total_bytes += stats->q_ibytes[i];
 935         }
 936
 937         for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
 938                         i < dev->data->nb_tx_queues; i++) {
 939                 if (dev->data->tx_queues[i] == NULL)
 940                         continue;
 941                 vq = dev->data->tx_queues[i];
 942                 stats->q_opackets[i] = vq->stats.pkts;
 943                 tx_missed_total += vq->stats.missed_pkts;
 944                 tx_total += stats->q_opackets[i];
 945
 946                 stats->q_obytes[i] = vq->stats.bytes;
 947                 tx_total_bytes += stats->q_obytes[i];
 948         }
 949
 950         stats->ipackets = rx_total;
 951         stats->opackets = tx_total;
 952         stats->oerrors = tx_missed_total;
 953         stats->ibytes = rx_total_bytes;
 954         stats->obytes = tx_total_bytes;
 955 }
 956
 957 static void
 958 eth_stats_reset(struct rte_eth_dev *dev)
 959 {
 960         struct vhost_queue *vq;
 961         unsigned i;
 962
 963         for (i = 0; i < dev->data->nb_rx_queues; i++) {
 964                 if (dev->data->rx_queues[i] == NULL)
 965                         continue;
 966                 vq = dev->data->rx_queues[i];
 967                 vq->stats.pkts = 0;
 968                 vq->stats.bytes = 0;
 969         }
 970         for (i = 0; i < dev->data->nb_tx_queues; i++) {
 971                 if (dev->data->tx_queues[i] == NULL)
 972                         continue;
 973                 vq = dev->data->tx_queues[i];
 974                 vq->stats.pkts = 0;
 975                 vq->stats.bytes = 0;
 976                 vq->stats.missed_pkts = 0;
 977         }
 978 }
 979
 980 static void
 981 eth_queue_release(void *q)
 982 {
 983         rte_free(q);
 984 }
 985
 986 static int
 987 eth_tx_done_cleanup(void *txq __rte_unused, uint32_t free_cnt __rte_unused)
 988 {
 989         /*
 990          * vHost does not hang onto mbuf. eth_vhost_tx() copies packet data
 991          * and releases mbuf, so nothing to cleanup.
 992          */
 993         return 0;
 994 }
 995
 996 static int
 997 eth_link_update(struct rte_eth_dev *dev __rte_unused,
 998                 int wait_to_complete __rte_unused)
 999 {
1000         return 0;
1001 }
1002
1003 static const struct eth_dev_ops ops = {
1004         .dev_start = eth_dev_start,
1005         .dev_stop = eth_dev_stop,
1006         .dev_close = eth_dev_close,
1007         .dev_configure = eth_dev_configure,
1008         .dev_infos_get = eth_dev_info,
1009         .rx_queue_setup = eth_rx_queue_setup,
1010         .tx_queue_setup = eth_tx_queue_setup,
1011         .rx_queue_release = eth_queue_release,
1012         .tx_queue_release = eth_queue_release,
1013         .tx_done_cleanup = eth_tx_done_cleanup,
1014         .link_update = eth_link_update,
1015         .stats_get = eth_stats_get,
1016         .stats_reset = eth_stats_reset,
1017         .xstats_reset = vhost_dev_xstats_reset,
1018         .xstats_get = vhost_dev_xstats_get,
1019         .xstats_get_names = vhost_dev_xstats_get_names,
1020 };
1021
1022 static struct rte_vdev_driver pmd_vhost_drv;
1023
1024 static int
1025 eth_dev_vhost_create(const char *name, char *iface_name, int16_t queues,
1026                      const unsigned numa_node, uint64_t flags)
1027 {
1028         struct rte_eth_dev_data *data = NULL;
1029         struct pmd_internal *internal = NULL;
1030         struct rte_eth_dev *eth_dev = NULL;
1031         struct ether_addr *eth_addr = NULL;
1032         struct rte_vhost_vring_state *vring_state = NULL;
1033         struct internal_list *list = NULL;
1034
1035         RTE_LOG(INFO, PMD, "Creating VHOST-USER backend on numa socket %u\n",
1036                 numa_node);
1037
1038         /* now do all data allocation - for eth_dev structure, dummy pci driver
1039          * and internal (private) data
1040          */
1041         data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
1042         if (data == NULL)
1043                 goto error;
1044
1045         internal = rte_zmalloc_socket(name, sizeof(*internal), 0, numa_node);
1046         if (internal == NULL)
1047                 goto error;
1048
1049         list = rte_zmalloc_socket(name, sizeof(*list), 0, numa_node);
1050         if (list == NULL)
1051                 goto error;
1052
1053         /* reserve an ethdev entry */
1054         eth_dev = rte_eth_dev_allocate(name);
1055         if (eth_dev == NULL)
1056                 goto error;
1057
1058         eth_addr = rte_zmalloc_socket(name, sizeof(*eth_addr), 0, numa_node);
1059         if (eth_addr == NULL)
1060                 goto error;
1061         *eth_addr = base_eth_addr;
1062         eth_addr->addr_bytes[5] = eth_dev->data->port_id;
1063
1064         vring_state = rte_zmalloc_socket(name,
1065                         sizeof(*vring_state), 0, numa_node);
1066         if (vring_state == NULL)
1067                 goto error;
1068
1069         /* now put it all together
1070          * - store queue data in internal,
1071          * - store numa_node info in ethdev data
1072          * - point eth_dev_data to internals
1073          * - and point eth_dev structure to new eth_dev_data structure
1074          */
1075         internal->dev_name = strdup(name);
1076         if (internal->dev_name == NULL)
1077                 goto error;
1078         internal->iface_name = strdup(iface_name);
1079         if (internal->iface_name == NULL)
1080                 goto error;
1081
1082         list->eth_dev = eth_dev;
1083         pthread_mutex_lock(&internal_list_lock);
1084         TAILQ_INSERT_TAIL(&internal_list, list, next);
1085         pthread_mutex_unlock(&internal_list_lock);
1086
1087         rte_spinlock_init(&vring_state->lock);
1088         vring_states[eth_dev->data->port_id] = vring_state;
1089
1090         data->dev_private = internal;
1091         data->port_id = eth_dev->data->port_id;
1092         memmove(data->name, eth_dev->data->name, sizeof(data->name));
1093         data->nb_rx_queues = queues;
1094         data->nb_tx_queues = queues;
1095         internal->max_queues = queues;
1096         data->dev_link = pmd_link;
1097         data->mac_addrs = eth_addr;
1098
1099         /* We'll replace the 'data' originally allocated by eth_dev. So the
1100          * vhost PMD resources won't be shared between multi processes.
1101          */
1102         eth_dev->data = data;
1103         eth_dev->dev_ops = &ops;
1104         eth_dev->driver = NULL;
1105         data->dev_flags =
1106                 RTE_ETH_DEV_DETACHABLE | RTE_ETH_DEV_INTR_LSC;
1107         data->kdrv = RTE_KDRV_NONE;
1108         data->drv_name = pmd_vhost_drv.driver.name;
1109         data->numa_node = numa_node;
1110
1111         /* finally assign rx and tx ops */
1112         eth_dev->rx_pkt_burst = eth_vhost_rx;
1113         eth_dev->tx_pkt_burst = eth_vhost_tx;
1114
1115         if (rte_vhost_driver_register(iface_name, flags))
1116                 goto error;
1117
1118         if (rte_vhost_driver_callback_register(iface_name, &vhost_ops) < 0) {
1119                 RTE_LOG(ERR, PMD, "Can't register callbacks\n");
1120                 goto error;
1121         }
1122
1123         /* We need only one message handling thread */
1124         if (rte_atomic16_add_return(&nb_started_ports, 1) == 1) {
1125                 if (vhost_driver_session_start())
1126                         goto error;
1127         }
1128
1129         return data->port_id;
1130
1131 error:
1132         if (internal)
1133                 free(internal->dev_name);
1134         rte_free(vring_state);
1135         rte_free(eth_addr);
1136         if (eth_dev)
1137                 rte_eth_dev_release_port(eth_dev);
1138         rte_free(internal);
1139         rte_free(list);
1140         rte_free(data);
1141
1142         return -1;
1143 }
1144
1145 static inline int
1146 open_iface(const char *key __rte_unused, const char *value, void *extra_args)
1147 {
1148         const char **iface_name = extra_args;
1149
1150         if (value == NULL)
1151                 return -1;
1152
1153         *iface_name = value;
1154
1155         return 0;
1156 }
1157
1158 static inline int
1159 open_int(const char *key __rte_unused, const char *value, void *extra_args)
1160 {
1161         uint16_t *n = extra_args;
1162
1163         if (value == NULL || extra_args == NULL)
1164                 return -EINVAL;
1165
1166         *n = (uint16_t)strtoul(value, NULL, 0);
1167         if (*n == USHRT_MAX && errno == ERANGE)
1168                 return -1;
1169
1170         return 0;
1171 }
1172
1173 static int
1174 rte_pmd_vhost_probe(const char *name, const char *params)
1175 {
1176         struct rte_kvargs *kvlist = NULL;
1177         int ret = 0;
1178         char *iface_name;
1179         uint16_t queues;
1180         uint64_t flags = 0;
1181         int client_mode = 0;
1182         int dequeue_zero_copy = 0;
1183
1184         RTE_LOG(INFO, PMD, "Initializing pmd_vhost for %s\n", name);
1185
1186         kvlist = rte_kvargs_parse(params, valid_arguments);
1187         if (kvlist == NULL)
1188                 return -1;
1189
1190         if (rte_kvargs_count(kvlist, ETH_VHOST_IFACE_ARG) == 1) {
1191                 ret = rte_kvargs_process(kvlist, ETH_VHOST_IFACE_ARG,
1192                                          &open_iface, &iface_name);
1193                 if (ret < 0)
1194                         goto out_free;
1195         } else {
1196                 ret = -1;
1197                 goto out_free;
1198         }
1199
1200         if (rte_kvargs_count(kvlist, ETH_VHOST_QUEUES_ARG) == 1) {
1201                 ret = rte_kvargs_process(kvlist, ETH_VHOST_QUEUES_ARG,
1202                                          &open_int, &queues);
1203                 if (ret < 0 || queues > RTE_MAX_QUEUES_PER_PORT)
1204                         goto out_free;
1205
1206         } else
1207                 queues = 1;
1208
1209         if (rte_kvargs_count(kvlist, ETH_VHOST_CLIENT_ARG) == 1) {
1210                 ret = rte_kvargs_process(kvlist, ETH_VHOST_CLIENT_ARG,
1211                                          &open_int, &client_mode);
1212                 if (ret < 0)
1213                         goto out_free;
1214
1215                 if (client_mode)
1216                         flags |= RTE_VHOST_USER_CLIENT;
1217         }
1218
1219         if (rte_kvargs_count(kvlist, ETH_VHOST_DEQUEUE_ZERO_COPY) == 1) {
1220                 ret = rte_kvargs_process(kvlist, ETH_VHOST_DEQUEUE_ZERO_COPY,
1221                                          &open_int, &dequeue_zero_copy);
1222                 if (ret < 0)
1223                         goto out_free;
1224
1225                 if (dequeue_zero_copy)
1226                         flags |= RTE_VHOST_USER_DEQUEUE_ZERO_COPY;
1227         }
1228
1229         eth_dev_vhost_create(name, iface_name, queues, rte_socket_id(), flags);
1230
1231 out_free:
1232         rte_kvargs_free(kvlist);
1233         return ret;
1234 }
1235
1236 static int
1237 rte_pmd_vhost_remove(const char *name)
1238 {
1239         struct rte_eth_dev *eth_dev = NULL;
1240         unsigned int i;
1241
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_stop(eth_dev);
1250
1251         eth_dev_close(eth_dev);
1252
1253         if (rte_atomic16_sub_return(&nb_started_ports, 1) == 0)
1254                 vhost_driver_session_stop();
1255
1256         rte_free(vring_states[eth_dev->data->port_id]);
1257         vring_states[eth_dev->data->port_id] = NULL;
1258
1259         for (i = 0; i < eth_dev->data->nb_rx_queues; i++)
1260                 rte_free(eth_dev->data->rx_queues[i]);
1261         for (i = 0; i < eth_dev->data->nb_tx_queues; i++)
1262                 rte_free(eth_dev->data->tx_queues[i]);
1263
1264         rte_free(eth_dev->data->mac_addrs);
1265         rte_free(eth_dev->data);
1266
1267         rte_eth_dev_release_port(eth_dev);
1268
1269         return 0;
1270 }
1271
1272 static struct rte_vdev_driver pmd_vhost_drv = {
1273         .probe = rte_pmd_vhost_probe,
1274         .remove = rte_pmd_vhost_remove,
1275 };
1276
1277 RTE_PMD_REGISTER_VDEV(net_vhost, pmd_vhost_drv);
1278 RTE_PMD_REGISTER_ALIAS(net_vhost, eth_vhost);
1279 RTE_PMD_REGISTER_PARAM_STRING(net_vhost,
1280         "iface=<ifc> "
1281         "queues=<int>");