4 * Copyright (c) 2016 IGEL Co., Ltd.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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,
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27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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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.
36 #ifdef RTE_LIBRTE_VHOST_NUMA
41 #include <rte_ethdev.h>
42 #include <rte_malloc.h>
43 #include <rte_memcpy.h>
45 #include <rte_kvargs.h>
46 #include <rte_virtio_net.h>
47 #include <rte_spinlock.h>
49 #include "rte_eth_vhost.h"
51 #define ETH_VHOST_IFACE_ARG "iface"
52 #define ETH_VHOST_QUEUES_ARG "queues"
54 static const char *drivername = "VHOST PMD";
56 static const char *valid_arguments[] = {
62 static struct ether_addr base_eth_addr = {
74 rte_atomic32_t allow_queuing;
75 rte_atomic32_t while_queuing;
76 struct virtio_net *device;
77 struct pmd_internal *internal;
78 struct rte_mempool *mb_pool;
80 uint16_t virtqueue_id;
93 volatile uint16_t once;
96 struct internal_list {
97 TAILQ_ENTRY(internal_list) next;
98 struct rte_eth_dev *eth_dev;
101 TAILQ_HEAD(internal_list_head, internal_list);
102 static struct internal_list_head internal_list =
103 TAILQ_HEAD_INITIALIZER(internal_list);
105 static pthread_mutex_t internal_list_lock = PTHREAD_MUTEX_INITIALIZER;
107 static rte_atomic16_t nb_started_ports;
108 static pthread_t session_th;
110 static struct rte_eth_link pmd_link = {
112 .link_duplex = ETH_LINK_FULL_DUPLEX,
113 .link_status = ETH_LINK_DOWN
116 struct rte_vhost_vring_state {
119 bool cur[RTE_MAX_QUEUES_PER_PORT * 2];
120 bool seen[RTE_MAX_QUEUES_PER_PORT * 2];
122 unsigned int max_vring;
125 static struct rte_vhost_vring_state *vring_states[RTE_MAX_ETHPORTS];
128 eth_vhost_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
130 struct vhost_queue *r = q;
131 uint16_t i, nb_rx = 0;
133 if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
136 rte_atomic32_set(&r->while_queuing, 1);
138 if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
141 /* Dequeue packets from guest TX queue */
142 nb_rx = rte_vhost_dequeue_burst(r->device,
143 r->virtqueue_id, r->mb_pool, bufs, nb_bufs);
147 for (i = 0; likely(i < nb_rx); i++) {
148 bufs[i]->port = r->port;
149 r->rx_bytes += bufs[i]->pkt_len;
153 rte_atomic32_set(&r->while_queuing, 0);
159 eth_vhost_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
161 struct vhost_queue *r = q;
162 uint16_t i, nb_tx = 0;
164 if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
167 rte_atomic32_set(&r->while_queuing, 1);
169 if (unlikely(rte_atomic32_read(&r->allow_queuing) == 0))
172 /* Enqueue packets to guest RX queue */
173 nb_tx = rte_vhost_enqueue_burst(r->device,
174 r->virtqueue_id, bufs, nb_bufs);
177 r->missed_pkts += nb_bufs - nb_tx;
179 for (i = 0; likely(i < nb_tx); i++)
180 r->tx_bytes += bufs[i]->pkt_len;
182 for (i = 0; likely(i < nb_tx); i++)
183 rte_pktmbuf_free(bufs[i]);
185 rte_atomic32_set(&r->while_queuing, 0);
191 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
196 static inline struct internal_list *
197 find_internal_resource(char *ifname)
200 struct internal_list *list;
201 struct pmd_internal *internal;
206 pthread_mutex_lock(&internal_list_lock);
208 TAILQ_FOREACH(list, &internal_list, next) {
209 internal = list->eth_dev->data->dev_private;
210 if (!strcmp(internal->iface_name, ifname)) {
216 pthread_mutex_unlock(&internal_list_lock);
225 new_device(struct virtio_net *dev)
227 struct rte_eth_dev *eth_dev;
228 struct internal_list *list;
229 struct pmd_internal *internal;
230 struct vhost_queue *vq;
232 #ifdef RTE_LIBRTE_VHOST_NUMA
237 RTE_LOG(INFO, PMD, "Invalid argument\n");
241 list = find_internal_resource(dev->ifname);
243 RTE_LOG(INFO, PMD, "Invalid device name\n");
247 eth_dev = list->eth_dev;
248 internal = eth_dev->data->dev_private;
250 #ifdef RTE_LIBRTE_VHOST_NUMA
251 ret = get_mempolicy(&newnode, NULL, 0, dev,
252 MPOL_F_NODE | MPOL_F_ADDR);
254 RTE_LOG(ERR, PMD, "Unknown numa node\n");
258 eth_dev->data->numa_node = newnode;
261 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
262 vq = eth_dev->data->rx_queues[i];
266 vq->internal = internal;
267 vq->port = eth_dev->data->port_id;
269 for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
270 vq = eth_dev->data->tx_queues[i];
274 vq->internal = internal;
275 vq->port = eth_dev->data->port_id;
278 for (i = 0; i < dev->virt_qp_nb * VIRTIO_QNUM; i++)
279 rte_vhost_enable_guest_notification(dev, i, 0);
281 dev->flags |= VIRTIO_DEV_RUNNING;
283 eth_dev->data->dev_link.link_status = ETH_LINK_UP;
285 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
286 vq = eth_dev->data->rx_queues[i];
289 rte_atomic32_set(&vq->allow_queuing, 1);
291 for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
292 vq = eth_dev->data->tx_queues[i];
295 rte_atomic32_set(&vq->allow_queuing, 1);
298 RTE_LOG(INFO, PMD, "New connection established\n");
300 _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC);
306 destroy_device(volatile struct virtio_net *dev)
308 struct rte_eth_dev *eth_dev;
309 struct vhost_queue *vq;
313 RTE_LOG(INFO, PMD, "Invalid argument\n");
317 eth_dev = (struct rte_eth_dev *)dev->priv;
318 if (eth_dev == NULL) {
319 RTE_LOG(INFO, PMD, "Failed to find a ethdev\n");
323 /* Wait until rx/tx_pkt_burst stops accessing vhost device */
324 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
325 vq = eth_dev->data->rx_queues[i];
328 rte_atomic32_set(&vq->allow_queuing, 0);
329 while (rte_atomic32_read(&vq->while_queuing))
332 for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
333 vq = eth_dev->data->tx_queues[i];
336 rte_atomic32_set(&vq->allow_queuing, 0);
337 while (rte_atomic32_read(&vq->while_queuing))
341 eth_dev->data->dev_link.link_status = ETH_LINK_DOWN;
344 dev->flags &= ~VIRTIO_DEV_RUNNING;
346 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
347 vq = eth_dev->data->rx_queues[i];
352 for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
353 vq = eth_dev->data->tx_queues[i];
359 RTE_LOG(INFO, PMD, "Connection closed\n");
361 _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC);
365 vring_state_changed(struct virtio_net *dev, uint16_t vring, int enable)
367 struct rte_vhost_vring_state *state;
368 struct rte_eth_dev *eth_dev;
369 struct internal_list *list;
372 RTE_LOG(ERR, PMD, "Invalid argument\n");
376 list = find_internal_resource(dev->ifname);
378 RTE_LOG(ERR, PMD, "Invalid interface name: %s\n", dev->ifname);
382 eth_dev = list->eth_dev;
384 state = vring_states[eth_dev->data->port_id];
385 rte_spinlock_lock(&state->lock);
386 state->cur[vring] = enable;
387 state->max_vring = RTE_MAX(vring, state->max_vring);
388 rte_spinlock_unlock(&state->lock);
390 RTE_LOG(INFO, PMD, "vring%u is %s\n",
391 vring, enable ? "enabled" : "disabled");
393 _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_QUEUE_STATE);
399 rte_eth_vhost_get_queue_event(uint8_t port_id,
400 struct rte_eth_vhost_queue_event *event)
402 struct rte_vhost_vring_state *state;
406 if (port_id >= RTE_MAX_ETHPORTS) {
407 RTE_LOG(ERR, PMD, "Invalid port id\n");
411 state = vring_states[port_id];
413 RTE_LOG(ERR, PMD, "Unused port\n");
417 rte_spinlock_lock(&state->lock);
418 for (i = 0; i <= state->max_vring; i++) {
419 idx = state->index++ % (state->max_vring + 1);
421 if (state->cur[idx] != state->seen[idx]) {
422 state->seen[idx] = state->cur[idx];
423 event->queue_id = idx / 2;
425 event->enable = state->cur[idx];
426 rte_spinlock_unlock(&state->lock);
430 rte_spinlock_unlock(&state->lock);
436 vhost_driver_session(void *param __rte_unused)
438 static struct virtio_net_device_ops vhost_ops;
440 /* set vhost arguments */
441 vhost_ops.new_device = new_device;
442 vhost_ops.destroy_device = destroy_device;
443 vhost_ops.vring_state_changed = vring_state_changed;
444 if (rte_vhost_driver_callback_register(&vhost_ops) < 0)
445 RTE_LOG(ERR, PMD, "Can't register callbacks\n");
447 /* start event handling */
448 rte_vhost_driver_session_start();
454 vhost_driver_session_start(void)
458 ret = pthread_create(&session_th,
459 NULL, vhost_driver_session, NULL);
461 RTE_LOG(ERR, PMD, "Can't create a thread\n");
467 vhost_driver_session_stop(void)
471 ret = pthread_cancel(session_th);
473 RTE_LOG(ERR, PMD, "Can't cancel the thread\n");
475 ret = pthread_join(session_th, NULL);
477 RTE_LOG(ERR, PMD, "Can't join the thread\n");
481 eth_dev_start(struct rte_eth_dev *dev)
483 struct pmd_internal *internal = dev->data->dev_private;
486 if (rte_atomic16_cmpset(&internal->once, 0, 1)) {
487 ret = rte_vhost_driver_register(internal->iface_name);
492 /* We need only one message handling thread */
493 if (rte_atomic16_add_return(&nb_started_ports, 1) == 1)
494 ret = vhost_driver_session_start();
500 eth_dev_stop(struct rte_eth_dev *dev)
502 struct pmd_internal *internal = dev->data->dev_private;
504 if (rte_atomic16_cmpset(&internal->once, 1, 0))
505 rte_vhost_driver_unregister(internal->iface_name);
507 if (rte_atomic16_sub_return(&nb_started_ports, 1) == 0)
508 vhost_driver_session_stop();
512 eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
513 uint16_t nb_rx_desc __rte_unused,
514 unsigned int socket_id,
515 const struct rte_eth_rxconf *rx_conf __rte_unused,
516 struct rte_mempool *mb_pool)
518 struct vhost_queue *vq;
520 vq = rte_zmalloc_socket(NULL, sizeof(struct vhost_queue),
521 RTE_CACHE_LINE_SIZE, socket_id);
523 RTE_LOG(ERR, PMD, "Failed to allocate memory for rx queue\n");
527 vq->mb_pool = mb_pool;
528 vq->virtqueue_id = rx_queue_id * VIRTIO_QNUM + VIRTIO_TXQ;
529 dev->data->rx_queues[rx_queue_id] = vq;
535 eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
536 uint16_t nb_tx_desc __rte_unused,
537 unsigned int socket_id,
538 const struct rte_eth_txconf *tx_conf __rte_unused)
540 struct vhost_queue *vq;
542 vq = rte_zmalloc_socket(NULL, sizeof(struct vhost_queue),
543 RTE_CACHE_LINE_SIZE, socket_id);
545 RTE_LOG(ERR, PMD, "Failed to allocate memory for tx queue\n");
549 vq->virtqueue_id = tx_queue_id * VIRTIO_QNUM + VIRTIO_RXQ;
550 dev->data->tx_queues[tx_queue_id] = vq;
556 eth_dev_info(struct rte_eth_dev *dev,
557 struct rte_eth_dev_info *dev_info)
559 struct pmd_internal *internal;
561 internal = dev->data->dev_private;
562 if (internal == NULL) {
563 RTE_LOG(ERR, PMD, "Invalid device specified\n");
567 dev_info->driver_name = drivername;
568 dev_info->max_mac_addrs = 1;
569 dev_info->max_rx_pktlen = (uint32_t)-1;
570 dev_info->max_rx_queues = internal->max_queues;
571 dev_info->max_tx_queues = internal->max_queues;
572 dev_info->min_rx_bufsize = 0;
576 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
579 unsigned long rx_total = 0, tx_total = 0, tx_missed_total = 0;
580 unsigned long rx_total_bytes = 0, tx_total_bytes = 0;
581 struct vhost_queue *vq;
583 for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
584 i < dev->data->nb_rx_queues; i++) {
585 if (dev->data->rx_queues[i] == NULL)
587 vq = dev->data->rx_queues[i];
588 stats->q_ipackets[i] = vq->rx_pkts;
589 rx_total += stats->q_ipackets[i];
591 stats->q_ibytes[i] = vq->rx_bytes;
592 rx_total_bytes += stats->q_ibytes[i];
595 for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
596 i < dev->data->nb_tx_queues; i++) {
597 if (dev->data->tx_queues[i] == NULL)
599 vq = dev->data->tx_queues[i];
600 stats->q_opackets[i] = vq->tx_pkts;
601 tx_missed_total += vq->missed_pkts;
602 tx_total += stats->q_opackets[i];
604 stats->q_obytes[i] = vq->tx_bytes;
605 tx_total_bytes += stats->q_obytes[i];
608 stats->ipackets = rx_total;
609 stats->opackets = tx_total;
610 stats->imissed = tx_missed_total;
611 stats->ibytes = rx_total_bytes;
612 stats->obytes = tx_total_bytes;
616 eth_stats_reset(struct rte_eth_dev *dev)
618 struct vhost_queue *vq;
621 for (i = 0; i < dev->data->nb_rx_queues; i++) {
622 if (dev->data->rx_queues[i] == NULL)
624 vq = dev->data->rx_queues[i];
628 for (i = 0; i < dev->data->nb_tx_queues; i++) {
629 if (dev->data->tx_queues[i] == NULL)
631 vq = dev->data->tx_queues[i];
639 eth_queue_release(void *q)
645 eth_link_update(struct rte_eth_dev *dev __rte_unused,
646 int wait_to_complete __rte_unused)
652 * Disable features in feature_mask. Returns 0 on success.
655 rte_eth_vhost_feature_disable(uint64_t feature_mask)
657 return rte_vhost_feature_disable(feature_mask);
661 * Enable features in feature_mask. Returns 0 on success.
664 rte_eth_vhost_feature_enable(uint64_t feature_mask)
666 return rte_vhost_feature_enable(feature_mask);
669 /* Returns currently supported vhost features */
671 rte_eth_vhost_feature_get(void)
673 return rte_vhost_feature_get();
676 static const struct eth_dev_ops ops = {
677 .dev_start = eth_dev_start,
678 .dev_stop = eth_dev_stop,
679 .dev_configure = eth_dev_configure,
680 .dev_infos_get = eth_dev_info,
681 .rx_queue_setup = eth_rx_queue_setup,
682 .tx_queue_setup = eth_tx_queue_setup,
683 .rx_queue_release = eth_queue_release,
684 .tx_queue_release = eth_queue_release,
685 .link_update = eth_link_update,
686 .stats_get = eth_stats_get,
687 .stats_reset = eth_stats_reset,
691 eth_dev_vhost_create(const char *name, char *iface_name, int16_t queues,
692 const unsigned numa_node)
694 struct rte_eth_dev_data *data = NULL;
695 struct pmd_internal *internal = NULL;
696 struct rte_eth_dev *eth_dev = NULL;
697 struct ether_addr *eth_addr = NULL;
698 struct rte_vhost_vring_state *vring_state = NULL;
699 struct internal_list *list = NULL;
701 RTE_LOG(INFO, PMD, "Creating VHOST-USER backend on numa socket %u\n",
704 /* now do all data allocation - for eth_dev structure, dummy pci driver
705 * and internal (private) data
707 data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
711 internal = rte_zmalloc_socket(name, sizeof(*internal), 0, numa_node);
712 if (internal == NULL)
715 list = rte_zmalloc_socket(name, sizeof(*list), 0, numa_node);
719 /* reserve an ethdev entry */
720 eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
724 eth_addr = rte_zmalloc_socket(name, sizeof(*eth_addr), 0, numa_node);
725 if (eth_addr == NULL)
727 *eth_addr = base_eth_addr;
728 eth_addr->addr_bytes[5] = eth_dev->data->port_id;
730 vring_state = rte_zmalloc_socket(name,
731 sizeof(*vring_state), 0, numa_node);
732 if (vring_state == NULL)
735 TAILQ_INIT(ð_dev->link_intr_cbs);
737 /* now put it all together
738 * - store queue data in internal,
739 * - store numa_node info in ethdev data
740 * - point eth_dev_data to internals
741 * - and point eth_dev structure to new eth_dev_data structure
743 internal->dev_name = strdup(name);
744 if (internal->dev_name == NULL)
746 internal->iface_name = strdup(iface_name);
747 if (internal->iface_name == NULL)
750 list->eth_dev = eth_dev;
751 pthread_mutex_lock(&internal_list_lock);
752 TAILQ_INSERT_TAIL(&internal_list, list, next);
753 pthread_mutex_unlock(&internal_list_lock);
755 rte_spinlock_init(&vring_state->lock);
756 vring_states[eth_dev->data->port_id] = vring_state;
758 data->dev_private = internal;
759 data->port_id = eth_dev->data->port_id;
760 memmove(data->name, eth_dev->data->name, sizeof(data->name));
761 data->nb_rx_queues = queues;
762 data->nb_tx_queues = queues;
763 internal->max_queues = queues;
764 data->dev_link = pmd_link;
765 data->mac_addrs = eth_addr;
767 /* We'll replace the 'data' originally allocated by eth_dev. So the
768 * vhost PMD resources won't be shared between multi processes.
770 eth_dev->data = data;
771 eth_dev->dev_ops = &ops;
772 eth_dev->driver = NULL;
774 RTE_ETH_DEV_DETACHABLE | RTE_ETH_DEV_INTR_LSC;
775 data->kdrv = RTE_KDRV_NONE;
776 data->drv_name = internal->dev_name;
777 data->numa_node = numa_node;
779 /* finally assign rx and tx ops */
780 eth_dev->rx_pkt_burst = eth_vhost_rx;
781 eth_dev->tx_pkt_burst = eth_vhost_tx;
783 return data->port_id;
787 free(internal->dev_name);
788 rte_free(vring_state);
791 rte_eth_dev_release_port(eth_dev);
800 open_iface(const char *key __rte_unused, const char *value, void *extra_args)
802 const char **iface_name = extra_args;
813 open_queues(const char *key __rte_unused, const char *value, void *extra_args)
815 uint16_t *q = extra_args;
817 if (value == NULL || extra_args == NULL)
820 *q = (uint16_t)strtoul(value, NULL, 0);
821 if (*q == USHRT_MAX && errno == ERANGE)
824 if (*q > RTE_MAX_QUEUES_PER_PORT)
831 rte_pmd_vhost_devinit(const char *name, const char *params)
833 struct rte_kvargs *kvlist = NULL;
838 RTE_LOG(INFO, PMD, "Initializing pmd_vhost for %s\n", name);
840 kvlist = rte_kvargs_parse(params, valid_arguments);
844 if (rte_kvargs_count(kvlist, ETH_VHOST_IFACE_ARG) == 1) {
845 ret = rte_kvargs_process(kvlist, ETH_VHOST_IFACE_ARG,
846 &open_iface, &iface_name);
854 if (rte_kvargs_count(kvlist, ETH_VHOST_QUEUES_ARG) == 1) {
855 ret = rte_kvargs_process(kvlist, ETH_VHOST_QUEUES_ARG,
856 &open_queues, &queues);
863 eth_dev_vhost_create(name, iface_name, queues, rte_socket_id());
866 rte_kvargs_free(kvlist);
871 rte_pmd_vhost_devuninit(const char *name)
873 struct rte_eth_dev *eth_dev = NULL;
874 struct pmd_internal *internal;
875 struct internal_list *list;
878 RTE_LOG(INFO, PMD, "Un-Initializing pmd_vhost for %s\n", name);
880 /* find an ethdev entry */
881 eth_dev = rte_eth_dev_allocated(name);
885 internal = eth_dev->data->dev_private;
886 if (internal == NULL)
889 list = find_internal_resource(internal->iface_name);
893 pthread_mutex_lock(&internal_list_lock);
894 TAILQ_REMOVE(&internal_list, list, next);
895 pthread_mutex_unlock(&internal_list_lock);
898 eth_dev_stop(eth_dev);
900 rte_free(vring_states[eth_dev->data->port_id]);
901 vring_states[eth_dev->data->port_id] = NULL;
903 free(internal->dev_name);
904 free(internal->iface_name);
906 for (i = 0; i < eth_dev->data->nb_rx_queues; i++)
907 rte_free(eth_dev->data->rx_queues[i]);
908 for (i = 0; i < eth_dev->data->nb_tx_queues; i++)
909 rte_free(eth_dev->data->tx_queues[i]);
911 rte_free(eth_dev->data->mac_addrs);
912 rte_free(eth_dev->data);
915 rte_eth_dev_release_port(eth_dev);
920 static struct rte_driver pmd_vhost_drv = {
923 .init = rte_pmd_vhost_devinit,
924 .uninit = rte_pmd_vhost_devuninit,
927 PMD_REGISTER_DRIVER(pmd_vhost_drv);