4 * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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 Intel Corporation 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,
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.
34 #include <linux/vhost.h>
35 #include <linux/virtio_net.h>
42 #ifdef RTE_LIBRTE_VHOST_NUMA
46 #include <sys/socket.h>
48 #include <rte_ethdev.h>
50 #include <rte_string_fns.h>
51 #include <rte_memory.h>
52 #include <rte_malloc.h>
53 #include <rte_virtio_net.h>
55 #include "vhost-net.h"
56 #include "virtio-net.h"
59 * Device linked list structure for configuration.
61 struct virtio_net_config_ll {
62 struct virtio_net dev; /* Virtio device.*/
63 struct virtio_net_config_ll *next; /* Next dev on linked list.*/
66 /* device ops to add/remove device to/from data core. */
67 struct virtio_net_device_ops const *notify_ops;
68 /* root address of the linked list of managed virtio devices */
69 static struct virtio_net_config_ll *ll_root;
71 #define VHOST_USER_F_PROTOCOL_FEATURES 30
73 /* Features supported by this lib. */
74 #define VHOST_SUPPORTED_FEATURES ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | \
75 (1ULL << VIRTIO_NET_F_CTRL_VQ) | \
76 (1ULL << VIRTIO_NET_F_CTRL_RX) | \
77 (VHOST_SUPPORTS_MQ) | \
78 (1ULL << VIRTIO_F_VERSION_1) | \
79 (1ULL << VHOST_F_LOG_ALL) | \
80 (1ULL << VHOST_USER_F_PROTOCOL_FEATURES) | \
81 (1ULL << VIRTIO_NET_F_HOST_TSO4) | \
82 (1ULL << VIRTIO_NET_F_HOST_TSO6) | \
83 (1ULL << VIRTIO_NET_F_CSUM) | \
84 (1ULL << VIRTIO_NET_F_GUEST_CSUM) | \
85 (1ULL << VIRTIO_NET_F_GUEST_TSO4) | \
86 (1ULL << VIRTIO_NET_F_GUEST_TSO6))
88 static uint64_t VHOST_FEATURES = VHOST_SUPPORTED_FEATURES;
92 * Converts QEMU virtual address to Vhost virtual address. This function is
93 * used to convert the ring addresses to our address space.
96 qva_to_vva(struct virtio_net *dev, uint64_t qemu_va)
98 struct virtio_memory_regions *region;
99 uint64_t vhost_va = 0;
100 uint32_t regionidx = 0;
102 /* Find the region where the address lives. */
103 for (regionidx = 0; regionidx < dev->mem->nregions; regionidx++) {
104 region = &dev->mem->regions[regionidx];
105 if ((qemu_va >= region->userspace_address) &&
106 (qemu_va <= region->userspace_address +
107 region->memory_size)) {
108 vhost_va = qemu_va + region->guest_phys_address +
109 region->address_offset -
110 region->userspace_address;
119 * Retrieves an entry from the devices configuration linked list.
121 static struct virtio_net_config_ll *
122 get_config_ll_entry(struct vhost_device_ctx ctx)
124 struct virtio_net_config_ll *ll_dev = ll_root;
126 /* Loop through linked list until the device_fh is found. */
127 while (ll_dev != NULL) {
128 if (ll_dev->dev.device_fh == ctx.fh)
130 ll_dev = ll_dev->next;
137 * Searches the configuration core linked list and
138 * retrieves the device if it exists.
141 get_device(struct vhost_device_ctx ctx)
143 struct virtio_net_config_ll *ll_dev;
145 ll_dev = get_config_ll_entry(ctx);
150 RTE_LOG(ERR, VHOST_CONFIG,
151 "(%"PRIu64") Device not found in linked list.\n", ctx.fh);
156 * Add entry containing a device to the device configuration linked list.
159 add_config_ll_entry(struct virtio_net_config_ll *new_ll_dev)
161 struct virtio_net_config_ll *ll_dev = ll_root;
163 /* If ll_dev == NULL then this is the first device so go to else */
165 /* If the 1st device_fh != 0 then we insert our device here. */
166 if (ll_dev->dev.device_fh != 0) {
167 new_ll_dev->dev.device_fh = 0;
168 new_ll_dev->next = ll_dev;
169 ll_root = new_ll_dev;
172 * Increment through the ll until we find un unused
173 * device_fh. Insert the device at that entry.
175 while ((ll_dev->next != NULL) &&
176 (ll_dev->dev.device_fh ==
177 (ll_dev->next->dev.device_fh - 1)))
178 ll_dev = ll_dev->next;
180 new_ll_dev->dev.device_fh = ll_dev->dev.device_fh + 1;
181 new_ll_dev->next = ll_dev->next;
182 ll_dev->next = new_ll_dev;
185 ll_root = new_ll_dev;
186 ll_root->dev.device_fh = 0;
192 cleanup_vq(struct vhost_virtqueue *vq, int destroy)
194 if ((vq->callfd >= 0) && (destroy != 0))
201 * Unmap any memory, close any file descriptors and
202 * free any memory owned by a device.
205 cleanup_device(struct virtio_net *dev, int destroy)
209 /* Unmap QEMU memory file if mapped. */
211 munmap((void *)(uintptr_t)dev->mem->mapped_address,
212 (size_t)dev->mem->mapped_size);
217 for (i = 0; i < dev->virt_qp_nb; i++) {
218 cleanup_vq(dev->virtqueue[i * VIRTIO_QNUM + VIRTIO_RXQ], destroy);
219 cleanup_vq(dev->virtqueue[i * VIRTIO_QNUM + VIRTIO_TXQ], destroy);
224 * Release virtqueues and device memory.
227 free_device(struct virtio_net_config_ll *ll_dev)
231 for (i = 0; i < ll_dev->dev.virt_qp_nb; i++)
232 rte_free(ll_dev->dev.virtqueue[i * VIRTIO_QNUM]);
238 * Remove an entry from the device configuration linked list.
240 static struct virtio_net_config_ll *
241 rm_config_ll_entry(struct virtio_net_config_ll *ll_dev,
242 struct virtio_net_config_ll *ll_dev_last)
244 /* First remove the device and then clean it up. */
245 if (ll_dev == ll_root) {
246 ll_root = ll_dev->next;
247 cleanup_device(&ll_dev->dev, 1);
251 if (likely(ll_dev_last != NULL)) {
252 ll_dev_last->next = ll_dev->next;
253 cleanup_device(&ll_dev->dev, 1);
255 return ll_dev_last->next;
257 cleanup_device(&ll_dev->dev, 1);
259 RTE_LOG(ERR, VHOST_CONFIG,
260 "Remove entry from config_ll failed\n");
267 init_vring_queue(struct vhost_virtqueue *vq, int qp_idx)
269 memset(vq, 0, sizeof(struct vhost_virtqueue));
274 /* Backends are set to -1 indicating an inactive device. */
277 /* always set the default vq pair to enabled */
283 init_vring_queue_pair(struct virtio_net *dev, uint32_t qp_idx)
285 uint32_t base_idx = qp_idx * VIRTIO_QNUM;
287 init_vring_queue(dev->virtqueue[base_idx + VIRTIO_RXQ], qp_idx);
288 init_vring_queue(dev->virtqueue[base_idx + VIRTIO_TXQ], qp_idx);
292 reset_vring_queue(struct vhost_virtqueue *vq, int qp_idx)
297 init_vring_queue(vq, qp_idx);
302 reset_vring_queue_pair(struct virtio_net *dev, uint32_t qp_idx)
304 uint32_t base_idx = qp_idx * VIRTIO_QNUM;
306 reset_vring_queue(dev->virtqueue[base_idx + VIRTIO_RXQ], qp_idx);
307 reset_vring_queue(dev->virtqueue[base_idx + VIRTIO_TXQ], qp_idx);
311 alloc_vring_queue_pair(struct virtio_net *dev, uint32_t qp_idx)
313 struct vhost_virtqueue *virtqueue = NULL;
314 uint32_t virt_rx_q_idx = qp_idx * VIRTIO_QNUM + VIRTIO_RXQ;
315 uint32_t virt_tx_q_idx = qp_idx * VIRTIO_QNUM + VIRTIO_TXQ;
317 virtqueue = rte_malloc(NULL,
318 sizeof(struct vhost_virtqueue) * VIRTIO_QNUM, 0);
319 if (virtqueue == NULL) {
320 RTE_LOG(ERR, VHOST_CONFIG,
321 "Failed to allocate memory for virt qp:%d.\n", qp_idx);
325 dev->virtqueue[virt_rx_q_idx] = virtqueue;
326 dev->virtqueue[virt_tx_q_idx] = virtqueue + VIRTIO_TXQ;
328 init_vring_queue_pair(dev, qp_idx);
330 dev->virt_qp_nb += 1;
336 * Reset some variables in device structure, while keeping few
337 * others untouched, such as device_fh, ifname, virt_qp_nb: they
338 * should be same unless the device is removed.
341 reset_device(struct virtio_net *dev)
346 dev->protocol_features = 0;
349 for (i = 0; i < dev->virt_qp_nb; i++)
350 reset_vring_queue_pair(dev, i);
354 * Function is called from the CUSE open function. The device structure is
355 * initialised and a new entry is added to the device configuration linked
359 new_device(struct vhost_device_ctx ctx)
361 struct virtio_net_config_ll *new_ll_dev;
363 /* Setup device and virtqueues. */
364 new_ll_dev = rte_zmalloc(NULL, sizeof(struct virtio_net_config_ll), 0);
365 if (new_ll_dev == NULL) {
366 RTE_LOG(ERR, VHOST_CONFIG,
367 "(%"PRIu64") Failed to allocate memory for dev.\n",
372 new_ll_dev->next = NULL;
374 /* Add entry to device configuration linked list. */
375 add_config_ll_entry(new_ll_dev);
377 return new_ll_dev->dev.device_fh;
381 * Function is called from the CUSE release function. This function will
382 * cleanup the device and remove it from device configuration linked list.
385 destroy_device(struct vhost_device_ctx ctx)
387 struct virtio_net_config_ll *ll_dev_cur_ctx, *ll_dev_last = NULL;
388 struct virtio_net_config_ll *ll_dev_cur = ll_root;
390 /* Find the linked list entry for the device to be removed. */
391 ll_dev_cur_ctx = get_config_ll_entry(ctx);
392 while (ll_dev_cur != NULL) {
394 * If the device is found or
395 * a device that doesn't exist is found then it is removed.
397 if (ll_dev_cur == ll_dev_cur_ctx) {
399 * If the device is running on a data core then call
400 * the function to remove it from the data core.
402 if ((ll_dev_cur->dev.flags & VIRTIO_DEV_RUNNING))
403 notify_ops->destroy_device(&(ll_dev_cur->dev));
404 ll_dev_cur = rm_config_ll_entry(ll_dev_cur,
407 ll_dev_last = ll_dev_cur;
408 ll_dev_cur = ll_dev_cur->next;
414 set_ifname(struct vhost_device_ctx ctx,
415 const char *if_name, unsigned int if_len)
417 struct virtio_net *dev;
420 dev = get_device(ctx);
424 len = if_len > sizeof(dev->ifname) ?
425 sizeof(dev->ifname) : if_len;
427 strncpy(dev->ifname, if_name, len);
432 * Called from CUSE IOCTL: VHOST_SET_OWNER
433 * This function just returns success at the moment unless
434 * the device hasn't been initialised.
437 set_owner(struct vhost_device_ctx ctx)
439 struct virtio_net *dev;
441 dev = get_device(ctx);
449 * Called from CUSE IOCTL: VHOST_RESET_OWNER
452 reset_owner(struct vhost_device_ctx ctx)
454 struct virtio_net *dev;
456 dev = get_device(ctx);
460 if (dev->flags & VIRTIO_DEV_RUNNING)
461 notify_ops->destroy_device(dev);
463 cleanup_device(dev, 0);
469 * Called from CUSE IOCTL: VHOST_GET_FEATURES
470 * The features that we support are requested.
473 get_features(struct vhost_device_ctx ctx, uint64_t *pu)
475 struct virtio_net *dev;
477 dev = get_device(ctx);
481 /* Send our supported features. */
482 *pu = VHOST_FEATURES;
487 * Called from CUSE IOCTL: VHOST_SET_FEATURES
488 * We receive the negotiated features supported by us and the virtio device.
491 set_features(struct vhost_device_ctx ctx, uint64_t *pu)
493 struct virtio_net *dev;
497 dev = get_device(ctx);
500 if (*pu & ~VHOST_FEATURES)
505 ((1 << VIRTIO_NET_F_MRG_RXBUF) | (1ULL << VIRTIO_F_VERSION_1))) {
506 vhost_hlen = sizeof(struct virtio_net_hdr_mrg_rxbuf);
508 vhost_hlen = sizeof(struct virtio_net_hdr);
510 LOG_DEBUG(VHOST_CONFIG,
511 "(%"PRIu64") Mergeable RX buffers %s, virtio 1 %s\n",
513 (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) ? "on" : "off",
514 (dev->features & (1ULL << VIRTIO_F_VERSION_1)) ? "on" : "off");
516 for (i = 0; i < dev->virt_qp_nb; i++) {
517 uint16_t base_idx = i * VIRTIO_QNUM;
519 dev->virtqueue[base_idx + VIRTIO_RXQ]->vhost_hlen = vhost_hlen;
520 dev->virtqueue[base_idx + VIRTIO_TXQ]->vhost_hlen = vhost_hlen;
527 * Called from CUSE IOCTL: VHOST_SET_VRING_NUM
528 * The virtio device sends us the size of the descriptor ring.
531 set_vring_num(struct vhost_device_ctx ctx, struct vhost_vring_state *state)
533 struct virtio_net *dev;
535 dev = get_device(ctx);
539 /* State->index refers to the queue index. The txq is 1, rxq is 0. */
540 dev->virtqueue[state->index]->size = state->num;
546 * Reallocate virtio_dev and vhost_virtqueue data structure to make them on the
547 * same numa node as the memory of vring descriptor.
549 #ifdef RTE_LIBRTE_VHOST_NUMA
550 static struct virtio_net*
551 numa_realloc(struct virtio_net *dev, int index)
553 int oldnode, newnode;
554 struct virtio_net_config_ll *old_ll_dev, *new_ll_dev = NULL;
555 struct vhost_virtqueue *old_vq, *new_vq = NULL;
557 int realloc_dev = 0, realloc_vq = 0;
559 old_ll_dev = (struct virtio_net_config_ll *)dev;
560 old_vq = dev->virtqueue[index];
562 ret = get_mempolicy(&newnode, NULL, 0, old_vq->desc,
563 MPOL_F_NODE | MPOL_F_ADDR);
564 ret = ret | get_mempolicy(&oldnode, NULL, 0, old_ll_dev,
565 MPOL_F_NODE | MPOL_F_ADDR);
567 RTE_LOG(ERR, VHOST_CONFIG,
568 "Unable to get vring desc or dev numa information.\n");
571 if (oldnode != newnode)
574 ret = get_mempolicy(&oldnode, NULL, 0, old_vq,
575 MPOL_F_NODE | MPOL_F_ADDR);
577 RTE_LOG(ERR, VHOST_CONFIG,
578 "Unable to get vq numa information.\n");
581 if (oldnode != newnode)
584 if (realloc_dev == 0 && realloc_vq == 0)
588 new_ll_dev = rte_malloc_socket(NULL,
589 sizeof(struct virtio_net_config_ll), 0, newnode);
591 new_vq = rte_malloc_socket(NULL,
592 sizeof(struct vhost_virtqueue), 0, newnode);
593 if (!new_ll_dev && !new_vq)
597 memcpy(new_vq, old_vq, sizeof(*new_vq));
599 memcpy(new_ll_dev, old_ll_dev, sizeof(*new_ll_dev));
600 (new_ll_dev ? new_ll_dev : old_ll_dev)->dev.virtqueue[index] =
601 new_vq ? new_vq : old_vq;
605 if (ll_root == old_ll_dev)
606 ll_root = new_ll_dev;
608 struct virtio_net_config_ll *prev = ll_root;
609 while (prev->next != old_ll_dev)
611 prev->next = new_ll_dev;
612 new_ll_dev->next = old_ll_dev->next;
614 rte_free(old_ll_dev);
617 return realloc_dev ? &new_ll_dev->dev : dev;
620 static struct virtio_net*
621 numa_realloc(struct virtio_net *dev, int index __rte_unused)
628 * Called from CUSE IOCTL: VHOST_SET_VRING_ADDR
629 * The virtio device sends us the desc, used and avail ring addresses.
630 * This function then converts these to our address space.
633 set_vring_addr(struct vhost_device_ctx ctx, struct vhost_vring_addr *addr)
635 struct virtio_net *dev;
636 struct vhost_virtqueue *vq;
638 dev = get_device(ctx);
642 /* addr->index refers to the queue index. The txq 1, rxq is 0. */
643 vq = dev->virtqueue[addr->index];
645 /* The addresses are converted from QEMU virtual to Vhost virtual. */
646 vq->desc = (struct vring_desc *)(uintptr_t)qva_to_vva(dev,
647 addr->desc_user_addr);
649 RTE_LOG(ERR, VHOST_CONFIG,
650 "(%"PRIu64") Failed to find desc ring address.\n",
655 dev = numa_realloc(dev, addr->index);
656 vq = dev->virtqueue[addr->index];
658 vq->avail = (struct vring_avail *)(uintptr_t)qva_to_vva(dev,
659 addr->avail_user_addr);
660 if (vq->avail == 0) {
661 RTE_LOG(ERR, VHOST_CONFIG,
662 "(%"PRIu64") Failed to find avail ring address.\n",
667 vq->used = (struct vring_used *)(uintptr_t)qva_to_vva(dev,
668 addr->used_user_addr);
670 RTE_LOG(ERR, VHOST_CONFIG,
671 "(%"PRIu64") Failed to find used ring address.\n",
676 vq->log_guest_addr = addr->log_guest_addr;
678 LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address desc: %p\n",
679 dev->device_fh, vq->desc);
680 LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address avail: %p\n",
681 dev->device_fh, vq->avail);
682 LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address used: %p\n",
683 dev->device_fh, vq->used);
684 LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") log_guest_addr: %"PRIx64"\n",
685 dev->device_fh, vq->log_guest_addr);
691 * Called from CUSE IOCTL: VHOST_SET_VRING_BASE
692 * The virtio device sends us the available ring last used index.
695 set_vring_base(struct vhost_device_ctx ctx, struct vhost_vring_state *state)
697 struct virtio_net *dev;
699 dev = get_device(ctx);
703 /* State->index refers to the queue index. The txq is 1, rxq is 0. */
704 dev->virtqueue[state->index]->last_used_idx = state->num;
705 dev->virtqueue[state->index]->last_used_idx_res = state->num;
711 * Called from CUSE IOCTL: VHOST_GET_VRING_BASE
712 * We send the virtio device our available ring last used index.
715 get_vring_base(struct vhost_device_ctx ctx, uint32_t index,
716 struct vhost_vring_state *state)
718 struct virtio_net *dev;
720 dev = get_device(ctx);
724 state->index = index;
725 /* State->index refers to the queue index. The txq is 1, rxq is 0. */
726 state->num = dev->virtqueue[state->index]->last_used_idx;
733 * Called from CUSE IOCTL: VHOST_SET_VRING_CALL
734 * The virtio device sends an eventfd to interrupt the guest. This fd gets
735 * copied into our process space.
738 set_vring_call(struct vhost_device_ctx ctx, struct vhost_vring_file *file)
740 struct virtio_net *dev;
741 struct vhost_virtqueue *vq;
742 uint32_t cur_qp_idx = file->index / VIRTIO_QNUM;
744 dev = get_device(ctx);
749 * FIXME: VHOST_SET_VRING_CALL is the first per-vring message
750 * we get, so we do vring queue pair allocation here.
752 if (cur_qp_idx + 1 > dev->virt_qp_nb) {
753 if (alloc_vring_queue_pair(dev, cur_qp_idx) < 0)
757 /* file->index refers to the queue index. The txq is 1, rxq is 0. */
758 vq = dev->virtqueue[file->index];
764 vq->callfd = file->fd;
770 * Called from CUSE IOCTL: VHOST_SET_VRING_KICK
771 * The virtio device sends an eventfd that it can use to notify us.
772 * This fd gets copied into our process space.
775 set_vring_kick(struct vhost_device_ctx ctx, struct vhost_vring_file *file)
777 struct virtio_net *dev;
778 struct vhost_virtqueue *vq;
780 dev = get_device(ctx);
784 /* file->index refers to the queue index. The txq is 1, rxq is 0. */
785 vq = dev->virtqueue[file->index];
790 vq->kickfd = file->fd;
796 * Called from CUSE IOCTL: VHOST_NET_SET_BACKEND
797 * To complete device initialisation when the virtio driver is loaded,
798 * we are provided with a valid fd for a tap device (not used by us).
799 * If this happens then we can add the device to a data core.
800 * When the virtio driver is removed we get fd=-1.
801 * At that point we remove the device from the data core.
802 * The device will still exist in the device configuration linked list.
805 set_backend(struct vhost_device_ctx ctx, struct vhost_vring_file *file)
807 struct virtio_net *dev;
809 dev = get_device(ctx);
813 /* file->index refers to the queue index. The txq is 1, rxq is 0. */
814 dev->virtqueue[file->index]->backend = file->fd;
817 * If the device isn't already running and both backend fds are set,
820 if (!(dev->flags & VIRTIO_DEV_RUNNING)) {
821 if (((int)dev->virtqueue[VIRTIO_TXQ]->backend != VIRTIO_DEV_STOPPED) &&
822 ((int)dev->virtqueue[VIRTIO_RXQ]->backend != VIRTIO_DEV_STOPPED)) {
823 return notify_ops->new_device(dev);
825 /* Otherwise we remove it. */
827 if (file->fd == VIRTIO_DEV_STOPPED)
828 notify_ops->destroy_device(dev);
833 * Function pointers are set for the device operations to allow CUSE to call
834 * functions when an IOCTL, device_add or device_release is received.
836 static const struct vhost_net_device_ops vhost_device_ops = {
837 .new_device = new_device,
838 .destroy_device = destroy_device,
840 .set_ifname = set_ifname,
842 .get_features = get_features,
843 .set_features = set_features,
845 .set_vring_num = set_vring_num,
846 .set_vring_addr = set_vring_addr,
847 .set_vring_base = set_vring_base,
848 .get_vring_base = get_vring_base,
850 .set_vring_kick = set_vring_kick,
851 .set_vring_call = set_vring_call,
853 .set_backend = set_backend,
855 .set_owner = set_owner,
856 .reset_owner = reset_owner,
860 * Called by main to setup callbacks when registering CUSE device.
862 struct vhost_net_device_ops const *
863 get_virtio_net_callbacks(void)
865 return &vhost_device_ops;
868 int rte_vhost_enable_guest_notification(struct virtio_net *dev,
869 uint16_t queue_id, int enable)
872 RTE_LOG(ERR, VHOST_CONFIG,
873 "guest notification isn't supported.\n");
877 dev->virtqueue[queue_id]->used->flags = VRING_USED_F_NO_NOTIFY;
881 uint64_t rte_vhost_feature_get(void)
883 return VHOST_FEATURES;
886 int rte_vhost_feature_disable(uint64_t feature_mask)
888 VHOST_FEATURES = VHOST_FEATURES & ~feature_mask;
892 int rte_vhost_feature_enable(uint64_t feature_mask)
894 if ((feature_mask & VHOST_SUPPORTED_FEATURES) == feature_mask) {
895 VHOST_FEATURES = VHOST_FEATURES | feature_mask;
902 * Register ops so that we can add/remove device to data core.
905 rte_vhost_driver_callback_register(struct virtio_net_device_ops const * const ops)