1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2016 Intel Corporation
12 #include <sys/eventfd.h>
13 #include <sys/types.h>
16 #include <rte_string_fns.h>
17 #include <rte_eal_memconfig.h>
20 #include "virtio_user_dev.h"
21 #include "../virtio_ethdev.h"
23 #define VIRTIO_USER_MEM_EVENT_CLB_NAME "virtio_user_mem_event_clb"
25 const char * const virtio_user_backend_strings[] = {
26 [VIRTIO_USER_BACKEND_UNKNOWN] = "VIRTIO_USER_BACKEND_UNKNOWN",
27 [VIRTIO_USER_BACKEND_VHOST_USER] = "VHOST_USER",
28 [VIRTIO_USER_BACKEND_VHOST_KERNEL] = "VHOST_NET",
29 [VIRTIO_USER_BACKEND_VHOST_VDPA] = "VHOST_VDPA",
33 virtio_user_create_queue(struct virtio_user_dev *dev, uint32_t queue_sel)
35 /* Of all per virtqueue MSGs, make sure VHOST_SET_VRING_CALL come
36 * firstly because vhost depends on this msg to allocate virtqueue
39 struct vhost_vring_file file;
42 file.index = queue_sel;
43 file.fd = dev->callfds[queue_sel];
44 ret = dev->ops->set_vring_call(dev, &file);
46 PMD_INIT_LOG(ERR, "(%s) Failed to create queue %u\n", dev->path, queue_sel);
54 virtio_user_kick_queue(struct virtio_user_dev *dev, uint32_t queue_sel)
57 struct vhost_vring_file file;
58 struct vhost_vring_state state;
59 struct vring *vring = &dev->vrings[queue_sel];
60 struct vring_packed *pq_vring = &dev->packed_vrings[queue_sel];
61 struct vhost_vring_addr addr = {
64 .flags = 0, /* disable log */
67 if (dev->features & (1ULL << VIRTIO_F_RING_PACKED)) {
69 (uint64_t)(uintptr_t)pq_vring->desc;
70 addr.avail_user_addr =
71 (uint64_t)(uintptr_t)pq_vring->driver;
73 (uint64_t)(uintptr_t)pq_vring->device;
75 addr.desc_user_addr = (uint64_t)(uintptr_t)vring->desc;
76 addr.avail_user_addr = (uint64_t)(uintptr_t)vring->avail;
77 addr.used_user_addr = (uint64_t)(uintptr_t)vring->used;
80 state.index = queue_sel;
81 state.num = vring->num;
82 ret = dev->ops->set_vring_num(dev, &state);
86 state.index = queue_sel;
87 state.num = 0; /* no reservation */
88 if (dev->features & (1ULL << VIRTIO_F_RING_PACKED))
89 state.num |= (1 << 15);
90 ret = dev->ops->set_vring_base(dev, &state);
94 ret = dev->ops->set_vring_addr(dev, &addr);
98 /* Of all per virtqueue MSGs, make sure VHOST_USER_SET_VRING_KICK comes
99 * lastly because vhost depends on this msg to judge if
102 file.index = queue_sel;
103 file.fd = dev->kickfds[queue_sel];
104 ret = dev->ops->set_vring_kick(dev, &file);
110 PMD_INIT_LOG(ERR, "(%s) Failed to kick queue %u\n", dev->path, queue_sel);
116 virtio_user_queue_setup(struct virtio_user_dev *dev,
117 int (*fn)(struct virtio_user_dev *, uint32_t))
119 uint32_t i, queue_sel;
121 for (i = 0; i < dev->max_queue_pairs; ++i) {
122 queue_sel = 2 * i + VTNET_SQ_RQ_QUEUE_IDX;
123 if (fn(dev, queue_sel) < 0) {
124 PMD_DRV_LOG(ERR, "(%s) setup rx vq %u failed", dev->path, i);
128 for (i = 0; i < dev->max_queue_pairs; ++i) {
129 queue_sel = 2 * i + VTNET_SQ_TQ_QUEUE_IDX;
130 if (fn(dev, queue_sel) < 0) {
131 PMD_DRV_LOG(INFO, "(%s) setup tx vq %u failed", dev->path, i);
140 virtio_user_dev_set_features(struct virtio_user_dev *dev)
145 pthread_mutex_lock(&dev->mutex);
147 /* Step 0: tell vhost to create queues */
148 if (virtio_user_queue_setup(dev, virtio_user_create_queue) < 0)
151 features = dev->features;
153 /* Strip VIRTIO_NET_F_MAC, as MAC address is handled in vdev init */
154 features &= ~(1ull << VIRTIO_NET_F_MAC);
155 /* Strip VIRTIO_NET_F_CTRL_VQ, as devices do not really need to know */
156 features &= ~(1ull << VIRTIO_NET_F_CTRL_VQ);
157 features &= ~(1ull << VIRTIO_NET_F_STATUS);
158 ret = dev->ops->set_features(dev, features);
161 PMD_DRV_LOG(INFO, "(%s) set features: 0x%" PRIx64, dev->path, features);
163 pthread_mutex_unlock(&dev->mutex);
169 virtio_user_start_device(struct virtio_user_dev *dev)
176 * We need to make sure that the locks will be
177 * taken in the correct order to avoid deadlocks.
179 * Before releasing this lock, this thread should
180 * not trigger any memory hotplug events.
182 * This is a temporary workaround, and should be
183 * replaced when we get proper supports from the
184 * memory subsystem in the future.
186 rte_mcfg_mem_read_lock();
187 pthread_mutex_lock(&dev->mutex);
189 /* Step 2: share memory regions */
190 ret = dev->ops->set_memory_table(dev);
194 /* Step 3: kick queues */
195 ret = virtio_user_queue_setup(dev, virtio_user_kick_queue);
199 /* Step 4: enable queues
200 * we enable the 1st queue pair by default.
202 ret = dev->ops->enable_qp(dev, 0, 1);
208 pthread_mutex_unlock(&dev->mutex);
209 rte_mcfg_mem_read_unlock();
213 pthread_mutex_unlock(&dev->mutex);
214 rte_mcfg_mem_read_unlock();
216 PMD_INIT_LOG(ERR, "(%s) Failed to start device\n", dev->path);
218 /* TODO: free resource here or caller to check */
222 int virtio_user_stop_device(struct virtio_user_dev *dev)
224 struct vhost_vring_state state;
228 pthread_mutex_lock(&dev->mutex);
232 for (i = 0; i < dev->max_queue_pairs; ++i) {
233 ret = dev->ops->enable_qp(dev, i, 0);
238 /* Stop the backend. */
239 for (i = 0; i < dev->max_queue_pairs * 2; ++i) {
241 ret = dev->ops->get_vring_base(dev, &state);
243 PMD_DRV_LOG(ERR, "(%s) get_vring_base failed, index=%u", dev->path, i);
248 dev->started = false;
251 pthread_mutex_unlock(&dev->mutex);
255 pthread_mutex_unlock(&dev->mutex);
257 PMD_INIT_LOG(ERR, "(%s) Failed to stop device\n", dev->path);
263 parse_mac(struct virtio_user_dev *dev, const char *mac)
265 struct rte_ether_addr tmp;
270 if (rte_ether_unformat_addr(mac, &tmp) == 0) {
271 memcpy(dev->mac_addr, &tmp, RTE_ETHER_ADDR_LEN);
272 dev->mac_specified = 1;
274 /* ignore the wrong mac, use random mac */
275 PMD_DRV_LOG(ERR, "wrong format of mac: %s", mac);
280 virtio_user_dev_init_notify(struct virtio_user_dev *dev)
286 for (i = 0; i < dev->max_queue_pairs * 2; i++) {
287 /* May use invalid flag, but some backend uses kickfd and
288 * callfd as criteria to judge if dev is alive. so finally we
291 callfd = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK);
293 PMD_DRV_LOG(ERR, "(%s) callfd error, %s", dev->path, strerror(errno));
296 kickfd = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK);
299 PMD_DRV_LOG(ERR, "(%s) kickfd error, %s", dev->path, strerror(errno));
302 dev->callfds[i] = callfd;
303 dev->kickfds[i] = kickfd;
308 for (j = 0; j < i; j++) {
309 if (dev->kickfds[j] >= 0) {
310 close(dev->kickfds[j]);
311 dev->kickfds[j] = -1;
313 if (dev->callfds[j] >= 0) {
314 close(dev->callfds[j]);
315 dev->callfds[j] = -1;
323 virtio_user_dev_uninit_notify(struct virtio_user_dev *dev)
327 for (i = 0; i < dev->max_queue_pairs * 2; ++i) {
328 if (dev->kickfds[i] >= 0) {
329 close(dev->kickfds[i]);
330 dev->kickfds[i] = -1;
332 if (dev->callfds[i] >= 0) {
333 close(dev->callfds[i]);
334 dev->callfds[i] = -1;
340 virtio_user_fill_intr_handle(struct virtio_user_dev *dev)
343 struct rte_eth_dev *eth_dev = &rte_eth_devices[dev->port_id];
345 if (!eth_dev->intr_handle) {
346 eth_dev->intr_handle = malloc(sizeof(*eth_dev->intr_handle));
347 if (!eth_dev->intr_handle) {
348 PMD_DRV_LOG(ERR, "(%s) failed to allocate intr_handle", dev->path);
351 memset(eth_dev->intr_handle, 0, sizeof(*eth_dev->intr_handle));
354 for (i = 0; i < dev->max_queue_pairs; ++i)
355 eth_dev->intr_handle->efds[i] = dev->callfds[i];
356 eth_dev->intr_handle->nb_efd = dev->max_queue_pairs;
357 eth_dev->intr_handle->max_intr = dev->max_queue_pairs + 1;
358 eth_dev->intr_handle->type = RTE_INTR_HANDLE_VDEV;
359 /* For virtio vdev, no need to read counter for clean */
360 eth_dev->intr_handle->efd_counter_size = 0;
361 eth_dev->intr_handle->fd = dev->ops->get_intr_fd(dev);
367 virtio_user_mem_event_cb(enum rte_mem_event type __rte_unused,
369 size_t len __rte_unused,
372 struct virtio_user_dev *dev = arg;
373 struct rte_memseg_list *msl;
377 /* ignore externally allocated memory */
378 msl = rte_mem_virt2memseg_list(addr);
382 pthread_mutex_lock(&dev->mutex);
384 if (dev->started == false)
387 /* Step 1: pause the active queues */
388 for (i = 0; i < dev->queue_pairs; i++) {
389 ret = dev->ops->enable_qp(dev, i, 0);
394 /* Step 2: update memory regions */
395 ret = dev->ops->set_memory_table(dev);
399 /* Step 3: resume the active queues */
400 for (i = 0; i < dev->queue_pairs; i++) {
401 ret = dev->ops->enable_qp(dev, i, 1);
407 pthread_mutex_unlock(&dev->mutex);
410 PMD_DRV_LOG(ERR, "(%s) Failed to update memory table\n", dev->path);
414 virtio_user_dev_setup(struct virtio_user_dev *dev)
416 if (dev->is_server) {
417 if (dev->backend_type != VIRTIO_USER_BACKEND_VHOST_USER) {
418 PMD_DRV_LOG(ERR, "Server mode only supports vhost-user!");
423 switch (dev->backend_type) {
424 case VIRTIO_USER_BACKEND_VHOST_USER:
425 dev->ops = &virtio_ops_user;
427 case VIRTIO_USER_BACKEND_VHOST_KERNEL:
428 dev->ops = &virtio_ops_kernel;
430 case VIRTIO_USER_BACKEND_VHOST_VDPA:
431 dev->ops = &virtio_ops_vdpa;
434 PMD_DRV_LOG(ERR, "(%s) Unknown backend type", dev->path);
438 if (dev->ops->setup(dev) < 0) {
439 PMD_INIT_LOG(ERR, "(%s) Failed to setup backend\n", dev->path);
443 if (virtio_user_dev_init_notify(dev) < 0) {
444 PMD_INIT_LOG(ERR, "(%s) Failed to init notifiers\n", dev->path);
448 if (virtio_user_fill_intr_handle(dev) < 0) {
449 PMD_INIT_LOG(ERR, "(%s) Failed to init interrupt handler\n", dev->path);
456 virtio_user_dev_uninit_notify(dev);
458 dev->ops->destroy(dev);
463 /* Use below macro to filter features from vhost backend */
464 #define VIRTIO_USER_SUPPORTED_FEATURES \
465 (1ULL << VIRTIO_NET_F_MAC | \
466 1ULL << VIRTIO_NET_F_STATUS | \
467 1ULL << VIRTIO_NET_F_MQ | \
468 1ULL << VIRTIO_NET_F_CTRL_MAC_ADDR | \
469 1ULL << VIRTIO_NET_F_CTRL_VQ | \
470 1ULL << VIRTIO_NET_F_CTRL_RX | \
471 1ULL << VIRTIO_NET_F_CTRL_VLAN | \
472 1ULL << VIRTIO_NET_F_CSUM | \
473 1ULL << VIRTIO_NET_F_HOST_TSO4 | \
474 1ULL << VIRTIO_NET_F_HOST_TSO6 | \
475 1ULL << VIRTIO_NET_F_MRG_RXBUF | \
476 1ULL << VIRTIO_RING_F_INDIRECT_DESC | \
477 1ULL << VIRTIO_NET_F_GUEST_CSUM | \
478 1ULL << VIRTIO_NET_F_GUEST_TSO4 | \
479 1ULL << VIRTIO_NET_F_GUEST_TSO6 | \
480 1ULL << VIRTIO_F_IN_ORDER | \
481 1ULL << VIRTIO_F_VERSION_1 | \
482 1ULL << VIRTIO_F_RING_PACKED)
485 virtio_user_dev_init(struct virtio_user_dev *dev, char *path, int queues,
486 int cq, int queue_size, const char *mac, char **ifname,
487 int server, int mrg_rxbuf, int in_order, int packed_vq,
488 enum virtio_user_backend_type backend_type)
490 uint64_t backend_features;
493 pthread_mutex_init(&dev->mutex, NULL);
494 strlcpy(dev->path, path, PATH_MAX);
496 for (i = 0; i < VIRTIO_MAX_VIRTQUEUES; i++) {
497 dev->kickfds[i] = -1;
498 dev->callfds[i] = -1;
502 dev->max_queue_pairs = queues;
503 dev->queue_pairs = 1; /* mq disabled by default */
504 dev->queue_size = queue_size;
505 dev->is_server = server;
506 dev->mac_specified = 0;
507 dev->frontend_features = 0;
508 dev->unsupported_features = 0;
509 dev->backend_type = backend_type;
514 dev->ifname = *ifname;
518 if (virtio_user_dev_setup(dev) < 0) {
519 PMD_INIT_LOG(ERR, "(%s) backend set up fails", dev->path);
523 if (dev->ops->set_owner(dev) < 0) {
524 PMD_INIT_LOG(ERR, "(%s) Failed to set backend owner", dev->path);
528 if (dev->ops->get_backend_features(&backend_features) < 0) {
529 PMD_INIT_LOG(ERR, "(%s) Failed to get backend features", dev->path);
533 dev->unsupported_features = ~(VIRTIO_USER_SUPPORTED_FEATURES | backend_features);
535 if (dev->ops->get_features(dev, &dev->device_features) < 0) {
536 PMD_INIT_LOG(ERR, "(%s) Failed to get device features", dev->path);
541 dev->unsupported_features |= (1ull << VIRTIO_NET_F_MRG_RXBUF);
544 dev->unsupported_features |= (1ull << VIRTIO_F_IN_ORDER);
547 dev->unsupported_features |= (1ull << VIRTIO_F_RING_PACKED);
549 if (dev->mac_specified)
550 dev->frontend_features |= (1ull << VIRTIO_NET_F_MAC);
552 dev->unsupported_features |= (1ull << VIRTIO_NET_F_MAC);
555 /* device does not really need to know anything about CQ,
556 * so if necessary, we just claim to support CQ
558 dev->frontend_features |= (1ull << VIRTIO_NET_F_CTRL_VQ);
560 dev->unsupported_features |= (1ull << VIRTIO_NET_F_CTRL_VQ);
561 /* Also disable features that depend on VIRTIO_NET_F_CTRL_VQ */
562 dev->unsupported_features |= (1ull << VIRTIO_NET_F_CTRL_RX);
563 dev->unsupported_features |= (1ull << VIRTIO_NET_F_CTRL_VLAN);
564 dev->unsupported_features |=
565 (1ull << VIRTIO_NET_F_GUEST_ANNOUNCE);
566 dev->unsupported_features |= (1ull << VIRTIO_NET_F_MQ);
567 dev->unsupported_features |=
568 (1ull << VIRTIO_NET_F_CTRL_MAC_ADDR);
571 /* The backend will not report this feature, we add it explicitly */
572 if (dev->backend_type == VIRTIO_USER_BACKEND_VHOST_USER)
573 dev->frontend_features |= (1ull << VIRTIO_NET_F_STATUS);
577 * (frontend_features | backend_features) & ~unsupported_features;
579 dev->device_features |= dev->frontend_features;
580 dev->device_features &= ~dev->unsupported_features;
582 if (rte_mem_event_callback_register(VIRTIO_USER_MEM_EVENT_CLB_NAME,
583 virtio_user_mem_event_cb, dev)) {
584 if (rte_errno != ENOTSUP) {
585 PMD_INIT_LOG(ERR, "(%s) Failed to register mem event callback\n",
595 virtio_user_dev_uninit(struct virtio_user_dev *dev)
597 virtio_user_stop_device(dev);
599 rte_mem_event_callback_unregister(VIRTIO_USER_MEM_EVENT_CLB_NAME, dev);
601 virtio_user_dev_uninit_notify(dev);
608 dev->ops->destroy(dev);
612 virtio_user_handle_mq(struct virtio_user_dev *dev, uint16_t q_pairs)
617 if (q_pairs > dev->max_queue_pairs) {
618 PMD_INIT_LOG(ERR, "(%s) multi-q config %u, but only %u supported",
619 dev->path, q_pairs, dev->max_queue_pairs);
623 for (i = 0; i < q_pairs; ++i)
624 ret |= dev->ops->enable_qp(dev, i, 1);
625 for (i = q_pairs; i < dev->max_queue_pairs; ++i)
626 ret |= dev->ops->enable_qp(dev, i, 0);
628 dev->queue_pairs = q_pairs;
634 virtio_user_handle_ctrl_msg(struct virtio_user_dev *dev, struct vring *vring,
637 struct virtio_net_ctrl_hdr *hdr;
638 virtio_net_ctrl_ack status = ~0;
639 uint16_t i, idx_data, idx_status;
640 uint32_t n_descs = 0;
642 /* locate desc for header, data, and status */
643 idx_data = vring->desc[idx_hdr].next;
647 while (vring->desc[i].flags == VRING_DESC_F_NEXT) {
648 i = vring->desc[i].next;
652 /* locate desc for status */
656 hdr = (void *)(uintptr_t)vring->desc[idx_hdr].addr;
657 if (hdr->class == VIRTIO_NET_CTRL_MQ &&
658 hdr->cmd == VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) {
661 queues = *(uint16_t *)(uintptr_t)vring->desc[idx_data].addr;
662 status = virtio_user_handle_mq(dev, queues);
663 } else if (hdr->class == VIRTIO_NET_CTRL_RX ||
664 hdr->class == VIRTIO_NET_CTRL_MAC ||
665 hdr->class == VIRTIO_NET_CTRL_VLAN) {
670 *(virtio_net_ctrl_ack *)(uintptr_t)vring->desc[idx_status].addr = status;
676 desc_is_avail(struct vring_packed_desc *desc, bool wrap_counter)
678 uint16_t flags = __atomic_load_n(&desc->flags, __ATOMIC_ACQUIRE);
680 return wrap_counter == !!(flags & VRING_PACKED_DESC_F_AVAIL) &&
681 wrap_counter != !!(flags & VRING_PACKED_DESC_F_USED);
685 virtio_user_handle_ctrl_msg_packed(struct virtio_user_dev *dev,
686 struct vring_packed *vring,
689 struct virtio_net_ctrl_hdr *hdr;
690 virtio_net_ctrl_ack status = ~0;
691 uint16_t idx_data, idx_status;
692 /* initialize to one, header is first */
693 uint32_t n_descs = 1;
695 /* locate desc for header, data, and status */
696 idx_data = idx_hdr + 1;
697 if (idx_data >= dev->queue_size)
698 idx_data -= dev->queue_size;
702 idx_status = idx_data;
703 while (vring->desc[idx_status].flags & VRING_DESC_F_NEXT) {
705 if (idx_status >= dev->queue_size)
706 idx_status -= dev->queue_size;
710 hdr = (void *)(uintptr_t)vring->desc[idx_hdr].addr;
711 if (hdr->class == VIRTIO_NET_CTRL_MQ &&
712 hdr->cmd == VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET) {
715 queues = *(uint16_t *)(uintptr_t)
716 vring->desc[idx_data].addr;
717 status = virtio_user_handle_mq(dev, queues);
718 } else if (hdr->class == VIRTIO_NET_CTRL_RX ||
719 hdr->class == VIRTIO_NET_CTRL_MAC ||
720 hdr->class == VIRTIO_NET_CTRL_VLAN) {
725 *(virtio_net_ctrl_ack *)(uintptr_t)
726 vring->desc[idx_status].addr = status;
728 /* Update used descriptor */
729 vring->desc[idx_hdr].id = vring->desc[idx_status].id;
730 vring->desc[idx_hdr].len = sizeof(status);
736 virtio_user_handle_cq_packed(struct virtio_user_dev *dev, uint16_t queue_idx)
738 struct virtio_user_queue *vq = &dev->packed_queues[queue_idx];
739 struct vring_packed *vring = &dev->packed_vrings[queue_idx];
740 uint16_t n_descs, flags;
742 /* Perform a load-acquire barrier in desc_is_avail to
743 * enforce the ordering between desc flags and desc
746 while (desc_is_avail(&vring->desc[vq->used_idx],
747 vq->used_wrap_counter)) {
749 n_descs = virtio_user_handle_ctrl_msg_packed(dev, vring,
752 flags = VRING_DESC_F_WRITE;
753 if (vq->used_wrap_counter)
754 flags |= VRING_PACKED_DESC_F_AVAIL_USED;
756 __atomic_store_n(&vring->desc[vq->used_idx].flags, flags,
759 vq->used_idx += n_descs;
760 if (vq->used_idx >= dev->queue_size) {
761 vq->used_idx -= dev->queue_size;
762 vq->used_wrap_counter ^= 1;
768 virtio_user_handle_cq(struct virtio_user_dev *dev, uint16_t queue_idx)
770 uint16_t avail_idx, desc_idx;
771 struct vring_used_elem *uep;
773 struct vring *vring = &dev->vrings[queue_idx];
775 /* Consume avail ring, using used ring idx as first one */
776 while (__atomic_load_n(&vring->used->idx, __ATOMIC_RELAXED)
777 != vring->avail->idx) {
778 avail_idx = __atomic_load_n(&vring->used->idx, __ATOMIC_RELAXED)
780 desc_idx = vring->avail->ring[avail_idx];
782 n_descs = virtio_user_handle_ctrl_msg(dev, vring, desc_idx);
784 /* Update used ring */
785 uep = &vring->used->ring[avail_idx];
789 __atomic_add_fetch(&vring->used->idx, 1, __ATOMIC_RELAXED);
794 virtio_user_dev_set_status(struct virtio_user_dev *dev, uint8_t status)
798 pthread_mutex_lock(&dev->mutex);
799 dev->status = status;
800 ret = dev->ops->set_status(dev, status);
801 if (ret && ret != -ENOTSUP)
802 PMD_INIT_LOG(ERR, "(%s) Failed to set backend status\n", dev->path);
804 pthread_mutex_unlock(&dev->mutex);
809 virtio_user_dev_update_status(struct virtio_user_dev *dev)
814 pthread_mutex_lock(&dev->mutex);
816 ret = dev->ops->get_status(dev, &status);
818 dev->status = status;
819 PMD_INIT_LOG(DEBUG, "Updated Device Status(0x%08x):\n"
821 "\t-ACKNOWLEDGE: %u\n"
824 "\t-FEATURES_OK: %u\n"
825 "\t-DEVICE_NEED_RESET: %u\n"
828 (dev->status == VIRTIO_CONFIG_STATUS_RESET),
829 !!(dev->status & VIRTIO_CONFIG_STATUS_ACK),
830 !!(dev->status & VIRTIO_CONFIG_STATUS_DRIVER),
831 !!(dev->status & VIRTIO_CONFIG_STATUS_DRIVER_OK),
832 !!(dev->status & VIRTIO_CONFIG_STATUS_FEATURES_OK),
833 !!(dev->status & VIRTIO_CONFIG_STATUS_DEV_NEED_RESET),
834 !!(dev->status & VIRTIO_CONFIG_STATUS_FAILED));
835 } else if (ret != -ENOTSUP) {
836 PMD_INIT_LOG(ERR, "(%s) Failed to get backend status\n", dev->path);
839 pthread_mutex_unlock(&dev->mutex);
844 virtio_user_dev_update_link_state(struct virtio_user_dev *dev)
846 if (dev->ops->update_link_state)
847 return dev->ops->update_link_state(dev);
853 virtio_user_dev_reset_queues_packed(struct rte_eth_dev *eth_dev)
855 struct virtio_user_dev *dev = eth_dev->data->dev_private;
856 struct virtio_hw *hw = &dev->hw;
857 struct virtnet_rx *rxvq;
858 struct virtnet_tx *txvq;
861 /* Add lock to avoid queue contention. */
862 rte_spinlock_lock(&hw->state_lock);
866 * Waiting for datapath to complete before resetting queues.
867 * 1 ms should be enough for the ongoing Tx/Rx function to finish.
871 /* Vring reset for each Tx queue and Rx queue. */
872 for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
873 rxvq = eth_dev->data->rx_queues[i];
874 virtqueue_rxvq_reset_packed(rxvq->vq);
875 virtio_dev_rx_queue_setup_finish(eth_dev, i);
878 for (i = 0; i < eth_dev->data->nb_tx_queues; i++) {
879 txvq = eth_dev->data->tx_queues[i];
880 virtqueue_txvq_reset_packed(txvq->vq);
884 rte_spinlock_unlock(&hw->state_lock);
888 virtio_user_dev_delayed_handler(void *param)
890 struct virtio_user_dev *dev = param;
891 struct rte_eth_dev *eth_dev = &rte_eth_devices[dev->port_id];
893 if (rte_intr_disable(eth_dev->intr_handle) < 0) {
894 PMD_DRV_LOG(ERR, "interrupt disable failed");
897 rte_intr_callback_unregister(eth_dev->intr_handle,
898 virtio_interrupt_handler, eth_dev);
899 if (dev->is_server) {
900 if (dev->ops->server_disconnect)
901 dev->ops->server_disconnect(dev);
902 eth_dev->intr_handle->fd = dev->ops->get_intr_fd(dev);
903 rte_intr_callback_register(eth_dev->intr_handle,
904 virtio_interrupt_handler, eth_dev);
905 if (rte_intr_enable(eth_dev->intr_handle) < 0) {
906 PMD_DRV_LOG(ERR, "interrupt enable failed");
913 virtio_user_dev_server_reconnect(struct virtio_user_dev *dev)
916 struct rte_eth_dev *eth_dev = &rte_eth_devices[dev->port_id];
917 struct virtio_hw *hw = &dev->hw;
919 if (!dev->ops->server_reconnect) {
920 PMD_DRV_LOG(ERR, "(%s) Missing server reconnect callback", dev->path);
924 if (dev->ops->server_reconnect(dev)) {
925 PMD_DRV_LOG(ERR, "(%s) Reconnect callback call failed", dev->path);
929 old_status = dev->status;
933 virtio_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
935 virtio_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
937 if (dev->ops->get_features(dev, &dev->device_features) < 0) {
938 PMD_INIT_LOG(ERR, "get_features failed: %s",
943 dev->device_features |= dev->frontend_features;
945 /* unmask vhost-user unsupported features */
946 dev->device_features &= ~(dev->unsupported_features);
948 dev->features &= dev->device_features;
950 /* For packed ring, resetting queues is required in reconnection. */
951 if (virtio_with_packed_queue(hw) &&
952 (old_status & VIRTIO_CONFIG_STATUS_DRIVER_OK)) {
953 PMD_INIT_LOG(NOTICE, "Packets on the fly will be dropped"
954 " when packed ring reconnecting.");
955 virtio_user_dev_reset_queues_packed(eth_dev);
958 virtio_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
960 /* Start the device */
961 virtio_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER_OK);
965 if (dev->queue_pairs > 1) {
966 ret = virtio_user_handle_mq(dev, dev->queue_pairs);
968 PMD_INIT_LOG(ERR, "Fails to enable multi-queue pairs!");
972 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
973 if (rte_intr_disable(eth_dev->intr_handle) < 0) {
974 PMD_DRV_LOG(ERR, "interrupt disable failed");
977 rte_intr_callback_unregister(eth_dev->intr_handle,
978 virtio_interrupt_handler,
981 eth_dev->intr_handle->fd = dev->ops->get_intr_fd(dev);
982 rte_intr_callback_register(eth_dev->intr_handle,
983 virtio_interrupt_handler, eth_dev);
985 if (rte_intr_enable(eth_dev->intr_handle) < 0) {
986 PMD_DRV_LOG(ERR, "interrupt enable failed");
990 PMD_INIT_LOG(NOTICE, "server mode virtio-user reconnection succeeds!");