Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2413 insertions, 0 deletions

diff --git a/src/seastar/dpdk/drivers/net/virtio/virtio_ethdev.c b/src/seastar/dpdk/drivers/net/virtio/virtio_ethdev.c
new file mode 100644
index 000000000..d25c08f0a
--- /dev/null
+++ b/src/seastar/dpdk/drivers/net/virtio/virtio_ethdev.c
@@ -0,0 +1,2413 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2016 Intel Corporation
+ */
+
+#include <stdint.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <rte_ethdev_driver.h>
+#include <rte_ethdev_pci.h>
+#include <rte_memcpy.h>
+#include <rte_string_fns.h>
+#include <rte_memzone.h>
+#include <rte_malloc.h>
+#include <rte_branch_prediction.h>
+#include <rte_pci.h>
+#include <rte_bus_pci.h>
+#include <rte_ether.h>
+#include <rte_ip.h>
+#include <rte_arp.h>
+#include <rte_common.h>
+#include <rte_errno.h>
+#include <rte_cpuflags.h>
+
+#include <rte_memory.h>
+#include <rte_eal.h>
+#include <rte_dev.h>
+#include <rte_cycles.h>
+#include <rte_kvargs.h>
+
+#include "virtio_ethdev.h"
+#include "virtio_pci.h"
+#include "virtio_logs.h"
+#include "virtqueue.h"
+#include "virtio_rxtx.h"
+
+static int eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev);
+static int  virtio_dev_configure(struct rte_eth_dev *dev);
+static int  virtio_dev_start(struct rte_eth_dev *dev);
+static void virtio_dev_stop(struct rte_eth_dev *dev);
+static void virtio_dev_promiscuous_enable(struct rte_eth_dev *dev);
+static void virtio_dev_promiscuous_disable(struct rte_eth_dev *dev);
+static void virtio_dev_allmulticast_enable(struct rte_eth_dev *dev);
+static void virtio_dev_allmulticast_disable(struct rte_eth_dev *dev);
+static void virtio_dev_info_get(struct rte_eth_dev *dev,
+				struct rte_eth_dev_info *dev_info);
+static int virtio_dev_link_update(struct rte_eth_dev *dev,
+	int wait_to_complete);
+static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
+
+static void virtio_set_hwaddr(struct virtio_hw *hw);
+static void virtio_get_hwaddr(struct virtio_hw *hw);
+
+static int virtio_dev_stats_get(struct rte_eth_dev *dev,
+				 struct rte_eth_stats *stats);
+static int virtio_dev_xstats_get(struct rte_eth_dev *dev,
+				 struct rte_eth_xstat *xstats, unsigned n);
+static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
+				       struct rte_eth_xstat_name *xstats_names,
+				       unsigned limit);
+static void virtio_dev_stats_reset(struct rte_eth_dev *dev);
+static void virtio_dev_free_mbufs(struct rte_eth_dev *dev);
+static int virtio_vlan_filter_set(struct rte_eth_dev *dev,
+				uint16_t vlan_id, int on);
+static int virtio_mac_addr_add(struct rte_eth_dev *dev,
+				struct ether_addr *mac_addr,
+				uint32_t index, uint32_t vmdq);
+static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
+static int virtio_mac_addr_set(struct rte_eth_dev *dev,
+				struct ether_addr *mac_addr);
+
+static int virtio_intr_disable(struct rte_eth_dev *dev);
+
+static int virtio_dev_queue_stats_mapping_set(
+	struct rte_eth_dev *eth_dev,
+	uint16_t queue_id,
+	uint8_t stat_idx,
+	uint8_t is_rx);
+
+int virtio_logtype_init;
+int virtio_logtype_driver;
+
+static void virtio_notify_peers(struct rte_eth_dev *dev);
+static void virtio_ack_link_announce(struct rte_eth_dev *dev);
+
+/*
+ * The set of PCI devices this driver supports
+ */
+static const struct rte_pci_id pci_id_virtio_map[] = {
+	{ RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_LEGACY_DEVICEID_NET) },
+	{ RTE_PCI_DEVICE(VIRTIO_PCI_VENDORID, VIRTIO_PCI_MODERN_DEVICEID_NET) },
+	{ .vendor_id = 0, /* sentinel */ },
+};
+
+struct rte_virtio_xstats_name_off {
+	char name[RTE_ETH_XSTATS_NAME_SIZE];
+	unsigned offset;
+};
+
+/* [rt]x_qX_ is prepended to the name string here */
+static const struct rte_virtio_xstats_name_off rte_virtio_rxq_stat_strings[] = {
+	{"good_packets",           offsetof(struct virtnet_rx, stats.packets)},
+	{"good_bytes",             offsetof(struct virtnet_rx, stats.bytes)},
+	{"errors",                 offsetof(struct virtnet_rx, stats.errors)},
+	{"multicast_packets",      offsetof(struct virtnet_rx, stats.multicast)},
+	{"broadcast_packets",      offsetof(struct virtnet_rx, stats.broadcast)},
+	{"undersize_packets",      offsetof(struct virtnet_rx, stats.size_bins[0])},
+	{"size_64_packets",        offsetof(struct virtnet_rx, stats.size_bins[1])},
+	{"size_65_127_packets",    offsetof(struct virtnet_rx, stats.size_bins[2])},
+	{"size_128_255_packets",   offsetof(struct virtnet_rx, stats.size_bins[3])},
+	{"size_256_511_packets",   offsetof(struct virtnet_rx, stats.size_bins[4])},
+	{"size_512_1023_packets",  offsetof(struct virtnet_rx, stats.size_bins[5])},
+	{"size_1024_1518_packets", offsetof(struct virtnet_rx, stats.size_bins[6])},
+	{"size_1519_max_packets",  offsetof(struct virtnet_rx, stats.size_bins[7])},
+};
+
+/* [rt]x_qX_ is prepended to the name string here */
+static const struct rte_virtio_xstats_name_off rte_virtio_txq_stat_strings[] = {
+	{"good_packets",           offsetof(struct virtnet_tx, stats.packets)},
+	{"good_bytes",             offsetof(struct virtnet_tx, stats.bytes)},
+	{"errors",                 offsetof(struct virtnet_tx, stats.errors)},
+	{"multicast_packets",      offsetof(struct virtnet_tx, stats.multicast)},
+	{"broadcast_packets",      offsetof(struct virtnet_tx, stats.broadcast)},
+	{"undersize_packets",      offsetof(struct virtnet_tx, stats.size_bins[0])},
+	{"size_64_packets",        offsetof(struct virtnet_tx, stats.size_bins[1])},
+	{"size_65_127_packets",    offsetof(struct virtnet_tx, stats.size_bins[2])},
+	{"size_128_255_packets",   offsetof(struct virtnet_tx, stats.size_bins[3])},
+	{"size_256_511_packets",   offsetof(struct virtnet_tx, stats.size_bins[4])},
+	{"size_512_1023_packets",  offsetof(struct virtnet_tx, stats.size_bins[5])},
+	{"size_1024_1518_packets", offsetof(struct virtnet_tx, stats.size_bins[6])},
+	{"size_1519_max_packets",  offsetof(struct virtnet_tx, stats.size_bins[7])},
+};
+
+#define VIRTIO_NB_RXQ_XSTATS (sizeof(rte_virtio_rxq_stat_strings) / \
+			    sizeof(rte_virtio_rxq_stat_strings[0]))
+#define VIRTIO_NB_TXQ_XSTATS (sizeof(rte_virtio_txq_stat_strings) / \
+			    sizeof(rte_virtio_txq_stat_strings[0]))
+
+struct virtio_hw_internal virtio_hw_internal[RTE_MAX_ETHPORTS];
+
+static struct virtio_pmd_ctrl *
+virtio_send_command_packed(struct virtnet_ctl *cvq,
+			   struct virtio_pmd_ctrl *ctrl,
+			   int *dlen, int pkt_num)
+{
+	struct virtqueue *vq = cvq->vq;
+	int head;
+	struct vring_packed_desc *desc = vq->vq_packed.ring.desc;
+	struct virtio_pmd_ctrl *result;
+	uint16_t flags;
+	int sum = 0;
+	int nb_descs = 0;
+	int k;
+
+	/*
+	 * Format is enforced in qemu code:
+	 * One TX packet for header;
+	 * At least one TX packet per argument;
+	 * One RX packet for ACK.
+	 */
+	head = vq->vq_avail_idx;
+	flags = vq->vq_packed.cached_flags;
+	desc[head].addr = cvq->virtio_net_hdr_mem;
+	desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
+	vq->vq_free_cnt--;
+	nb_descs++;
+	if (++vq->vq_avail_idx >= vq->vq_nentries) {
+		vq->vq_avail_idx -= vq->vq_nentries;
+		vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
+	}
+
+	for (k = 0; k < pkt_num; k++) {
+		desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
+			+ sizeof(struct virtio_net_ctrl_hdr)
+			+ sizeof(ctrl->status) + sizeof(uint8_t) * sum;
+		desc[vq->vq_avail_idx].len = dlen[k];
+		desc[vq->vq_avail_idx].flags = VRING_DESC_F_NEXT |
+			vq->vq_packed.cached_flags;
+		sum += dlen[k];
+		vq->vq_free_cnt--;
+		nb_descs++;
+		if (++vq->vq_avail_idx >= vq->vq_nentries) {
+			vq->vq_avail_idx -= vq->vq_nentries;
+			vq->vq_packed.cached_flags ^=
+				VRING_PACKED_DESC_F_AVAIL_USED;
+		}
+	}
+
+	desc[vq->vq_avail_idx].addr = cvq->virtio_net_hdr_mem
+		+ sizeof(struct virtio_net_ctrl_hdr);
+	desc[vq->vq_avail_idx].len = sizeof(ctrl->status);
+	desc[vq->vq_avail_idx].flags = VRING_DESC_F_WRITE |
+		vq->vq_packed.cached_flags;
+	vq->vq_free_cnt--;
+	nb_descs++;
+	if (++vq->vq_avail_idx >= vq->vq_nentries) {
+		vq->vq_avail_idx -= vq->vq_nentries;
+		vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
+	}
+
+	virtio_wmb(vq->hw->weak_barriers);
+	desc[head].flags = VRING_DESC_F_NEXT | flags;
+
+	virtio_wmb(vq->hw->weak_barriers);
+	virtqueue_notify(vq);
+
+	/* wait for used descriptors in virtqueue */
+	while (!desc_is_used(&desc[head], vq))
+		usleep(100);
+
+	virtio_rmb(vq->hw->weak_barriers);
+
+	/* now get used descriptors */
+	vq->vq_free_cnt += nb_descs;
+	vq->vq_used_cons_idx += nb_descs;
+	if (vq->vq_used_cons_idx >= vq->vq_nentries) {
+		vq->vq_used_cons_idx -= vq->vq_nentries;
+		vq->vq_packed.used_wrap_counter ^= 1;
+	}
+
+	PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\n"
+			"vq->vq_avail_idx=%d\n"
+			"vq->vq_used_cons_idx=%d\n"
+			"vq->vq_packed.cached_flags=0x%x\n"
+			"vq->vq_packed.used_wrap_counter=%d\n",
+			vq->vq_free_cnt,
+			vq->vq_avail_idx,
+			vq->vq_used_cons_idx,
+			vq->vq_packed.cached_flags,
+			vq->vq_packed.used_wrap_counter);
+
+	result = cvq->virtio_net_hdr_mz->addr;
+	return result;
+}
+
+static struct virtio_pmd_ctrl *
+virtio_send_command_split(struct virtnet_ctl *cvq,
+			  struct virtio_pmd_ctrl *ctrl,
+			  int *dlen, int pkt_num)
+{
+	struct virtio_pmd_ctrl *result;
+	struct virtqueue *vq = cvq->vq;
+	uint32_t head, i;
+	int k, sum = 0;
+
+	head = vq->vq_desc_head_idx;
+
+	/*
+	 * Format is enforced in qemu code:
+	 * One TX packet for header;
+	 * At least one TX packet per argument;
+	 * One RX packet for ACK.
+	 */
+	vq->vq_split.ring.desc[head].flags = VRING_DESC_F_NEXT;
+	vq->vq_split.ring.desc[head].addr = cvq->virtio_net_hdr_mem;
+	vq->vq_split.ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
+	vq->vq_free_cnt--;
+	i = vq->vq_split.ring.desc[head].next;
+
+	for (k = 0; k < pkt_num; k++) {
+		vq->vq_split.ring.desc[i].flags = VRING_DESC_F_NEXT;
+		vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
+			+ sizeof(struct virtio_net_ctrl_hdr)
+			+ sizeof(ctrl->status) + sizeof(uint8_t)*sum;
+		vq->vq_split.ring.desc[i].len = dlen[k];
+		sum += dlen[k];
+		vq->vq_free_cnt--;
+		i = vq->vq_split.ring.desc[i].next;
+	}
+
+	vq->vq_split.ring.desc[i].flags = VRING_DESC_F_WRITE;
+	vq->vq_split.ring.desc[i].addr = cvq->virtio_net_hdr_mem
+			+ sizeof(struct virtio_net_ctrl_hdr);
+	vq->vq_split.ring.desc[i].len = sizeof(ctrl->status);
+	vq->vq_free_cnt--;
+
+	vq->vq_desc_head_idx = vq->vq_split.ring.desc[i].next;
+
+	vq_update_avail_ring(vq, head);
+	vq_update_avail_idx(vq);
+
+	PMD_INIT_LOG(DEBUG, "vq->vq_queue_index = %d", vq->vq_queue_index);
+
+	virtqueue_notify(vq);
+
+	rte_rmb();
+	while (VIRTQUEUE_NUSED(vq) == 0) {
+		rte_rmb();
+		usleep(100);
+	}
+
+	while (VIRTQUEUE_NUSED(vq)) {
+		uint32_t idx, desc_idx, used_idx;
+		struct vring_used_elem *uep;
+
+		used_idx = (uint32_t)(vq->vq_used_cons_idx
+				& (vq->vq_nentries - 1));
+		uep = &vq->vq_split.ring.used->ring[used_idx];
+		idx = (uint32_t) uep->id;
+		desc_idx = idx;
+
+		while (vq->vq_split.ring.desc[desc_idx].flags &
+				VRING_DESC_F_NEXT) {
+			desc_idx = vq->vq_split.ring.desc[desc_idx].next;
+			vq->vq_free_cnt++;
+		}
+
+		vq->vq_split.ring.desc[desc_idx].next = vq->vq_desc_head_idx;
+		vq->vq_desc_head_idx = idx;
+
+		vq->vq_used_cons_idx++;
+		vq->vq_free_cnt++;
+	}
+
+	PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
+			vq->vq_free_cnt, vq->vq_desc_head_idx);
+
+	result = cvq->virtio_net_hdr_mz->addr;
+	return result;
+}
+
+static int
+virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
+		    int *dlen, int pkt_num)
+{
+	virtio_net_ctrl_ack status = ~0;
+	struct virtio_pmd_ctrl *result;
+	struct virtqueue *vq;
+
+	ctrl->status = status;
+
+	if (!cvq || !cvq->vq) {
+		PMD_INIT_LOG(ERR, "Control queue is not supported.");
+		return -1;
+	}
+
+	rte_spinlock_lock(&cvq->lock);
+	vq = cvq->vq;
+
+	PMD_INIT_LOG(DEBUG, "vq->vq_desc_head_idx = %d, status = %d, "
+		"vq->hw->cvq = %p vq = %p",
+		vq->vq_desc_head_idx, status, vq->hw->cvq, vq);
+
+	if (vq->vq_free_cnt < pkt_num + 2 || pkt_num < 1) {
+		rte_spinlock_unlock(&cvq->lock);
+		return -1;
+	}
+
+	memcpy(cvq->virtio_net_hdr_mz->addr, ctrl,
+		sizeof(struct virtio_pmd_ctrl));
+
+	if (vtpci_packed_queue(vq->hw))
+		result = virtio_send_command_packed(cvq, ctrl, dlen, pkt_num);
+	else
+		result = virtio_send_command_split(cvq, ctrl, dlen, pkt_num);
+
+	rte_spinlock_unlock(&cvq->lock);
+	return result->status;
+}
+
+static int
+virtio_set_multiple_queues(struct rte_eth_dev *dev, uint16_t nb_queues)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct virtio_pmd_ctrl ctrl;
+	int dlen[1];
+	int ret;
+
+	ctrl.hdr.class = VIRTIO_NET_CTRL_MQ;
+	ctrl.hdr.cmd = VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET;
+	memcpy(ctrl.data, &nb_queues, sizeof(uint16_t));
+
+	dlen[0] = sizeof(uint16_t);
+
+	ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
+	if (ret) {
+		PMD_INIT_LOG(ERR, "Multiqueue configured but send command "
+			  "failed, this is too late now...");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void
+virtio_dev_queue_release(void *queue __rte_unused)
+{
+	/* do nothing */
+}
+
+static uint16_t
+virtio_get_nr_vq(struct virtio_hw *hw)
+{
+	uint16_t nr_vq = hw->max_queue_pairs * 2;
+
+	if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
+		nr_vq += 1;
+
+	return nr_vq;
+}
+
+static void
+virtio_init_vring(struct virtqueue *vq)
+{
+	int size = vq->vq_nentries;
+	uint8_t *ring_mem = vq->vq_ring_virt_mem;
+
+	PMD_INIT_FUNC_TRACE();
+
+	memset(ring_mem, 0, vq->vq_ring_size);
+
+	vq->vq_used_cons_idx = 0;
+	vq->vq_desc_head_idx = 0;
+	vq->vq_avail_idx = 0;
+	vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1);
+	vq->vq_free_cnt = vq->vq_nentries;
+	memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
+	if (vtpci_packed_queue(vq->hw)) {
+		vring_init_packed(&vq->vq_packed.ring, ring_mem,
+				  VIRTIO_PCI_VRING_ALIGN, size);
+		vring_desc_init_packed(vq, size);
+	} else {
+		struct vring *vr = &vq->vq_split.ring;
+
+		vring_init_split(vr, ring_mem, VIRTIO_PCI_VRING_ALIGN, size);
+		vring_desc_init_split(vr->desc, size);
+	}
+	/*
+	 * Disable device(host) interrupting guest
+	 */
+	virtqueue_disable_intr(vq);
+}
+
+static int
+virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
+{
+	char vq_name[VIRTQUEUE_MAX_NAME_SZ];
+	char vq_hdr_name[VIRTQUEUE_MAX_NAME_SZ];
+	const struct rte_memzone *mz = NULL, *hdr_mz = NULL;
+	unsigned int vq_size, size;
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct virtnet_rx *rxvq = NULL;
+	struct virtnet_tx *txvq = NULL;
+	struct virtnet_ctl *cvq = NULL;
+	struct virtqueue *vq;
+	size_t sz_hdr_mz = 0;
+	void *sw_ring = NULL;
+	int queue_type = virtio_get_queue_type(hw, vtpci_queue_idx);
+	int ret;
+	int numa_node = dev->device->numa_node;
+
+	PMD_INIT_LOG(INFO, "setting up queue: %u on NUMA node %d",
+			vtpci_queue_idx, numa_node);
+
+	/*
+	 * Read the virtqueue size from the Queue Size field
+	 * Always power of 2 and if 0 virtqueue does not exist
+	 */
+	vq_size = VTPCI_OPS(hw)->get_queue_num(hw, vtpci_queue_idx);
+	PMD_INIT_LOG(DEBUG, "vq_size: %u", vq_size);
+	if (vq_size == 0) {
+		PMD_INIT_LOG(ERR, "virtqueue does not exist");
+		return -EINVAL;
+	}
+
+	if (!rte_is_power_of_2(vq_size)) {
+		PMD_INIT_LOG(ERR, "virtqueue size is not powerof 2");
+		return -EINVAL;
+	}
+
+	snprintf(vq_name, sizeof(vq_name), "port%d_vq%d",
+		 dev->data->port_id, vtpci_queue_idx);
+
+	size = RTE_ALIGN_CEIL(sizeof(*vq) +
+				vq_size * sizeof(struct vq_desc_extra),
+				RTE_CACHE_LINE_SIZE);
+	if (queue_type == VTNET_TQ) {
+		/*
+		 * For each xmit packet, allocate a virtio_net_hdr
+		 * and indirect ring elements
+		 */
+		sz_hdr_mz = vq_size * sizeof(struct virtio_tx_region);
+	} else if (queue_type == VTNET_CQ) {
+		/* Allocate a page for control vq command, data and status */
+		sz_hdr_mz = PAGE_SIZE;
+	}
+
+	vq = rte_zmalloc_socket(vq_name, size, RTE_CACHE_LINE_SIZE,
+				numa_node);
+	if (vq == NULL) {
+		PMD_INIT_LOG(ERR, "can not allocate vq");
+		return -ENOMEM;
+	}
+	hw->vqs[vtpci_queue_idx] = vq;
+
+	vq->hw = hw;
+	vq->vq_queue_index = vtpci_queue_idx;
+	vq->vq_nentries = vq_size;
+	if (vtpci_packed_queue(hw)) {
+		vq->vq_packed.used_wrap_counter = 1;
+		vq->vq_packed.cached_flags = VRING_PACKED_DESC_F_AVAIL;
+		vq->vq_packed.event_flags_shadow = 0;
+		if (queue_type == VTNET_RQ)
+			vq->vq_packed.cached_flags |= VRING_DESC_F_WRITE;
+	}
+
+	/*
+	 * Reserve a memzone for vring elements
+	 */
+	size = vring_size(hw, vq_size, VIRTIO_PCI_VRING_ALIGN);
+	vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
+	PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
+		     size, vq->vq_ring_size);
+
+	mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
+			numa_node, RTE_MEMZONE_IOVA_CONTIG,
+			VIRTIO_PCI_VRING_ALIGN);
+	if (mz == NULL) {
+		if (rte_errno == EEXIST)
+			mz = rte_memzone_lookup(vq_name);
+		if (mz == NULL) {
+			ret = -ENOMEM;
+			goto fail_q_alloc;
+		}
+	}
+
+	memset(mz->addr, 0, mz->len);
+
+	vq->vq_ring_mem = mz->iova;
+	vq->vq_ring_virt_mem = mz->addr;
+	PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%" PRIx64,
+		     (uint64_t)mz->iova);
+	PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
+		     (uint64_t)(uintptr_t)mz->addr);
+
+	virtio_init_vring(vq);
+
+	if (sz_hdr_mz) {
+		snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
+			 dev->data->port_id, vtpci_queue_idx);
+		hdr_mz = rte_memzone_reserve_aligned(vq_hdr_name, sz_hdr_mz,
+				numa_node, RTE_MEMZONE_IOVA_CONTIG,
+				RTE_CACHE_LINE_SIZE);
+		if (hdr_mz == NULL) {
+			if (rte_errno == EEXIST)
+				hdr_mz = rte_memzone_lookup(vq_hdr_name);
+			if (hdr_mz == NULL) {
+				ret = -ENOMEM;
+				goto fail_q_alloc;
+			}
+		}
+	}
+
+	if (queue_type == VTNET_RQ) {
+		size_t sz_sw = (RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
+			       sizeof(vq->sw_ring[0]);
+
+		sw_ring = rte_zmalloc_socket("sw_ring", sz_sw,
+				RTE_CACHE_LINE_SIZE, numa_node);
+		if (!sw_ring) {
+			PMD_INIT_LOG(ERR, "can not allocate RX soft ring");
+			ret = -ENOMEM;
+			goto fail_q_alloc;
+		}
+
+		vq->sw_ring = sw_ring;
+		rxvq = &vq->rxq;
+		rxvq->vq = vq;
+		rxvq->port_id = dev->data->port_id;
+		rxvq->mz = mz;
+	} else if (queue_type == VTNET_TQ) {
+		txvq = &vq->txq;
+		txvq->vq = vq;
+		txvq->port_id = dev->data->port_id;
+		txvq->mz = mz;
+		txvq->virtio_net_hdr_mz = hdr_mz;
+		txvq->virtio_net_hdr_mem = hdr_mz->iova;
+	} else if (queue_type == VTNET_CQ) {
+		cvq = &vq->cq;
+		cvq->vq = vq;
+		cvq->mz = mz;
+		cvq->virtio_net_hdr_mz = hdr_mz;
+		cvq->virtio_net_hdr_mem = hdr_mz->iova;
+		memset(cvq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
+
+		hw->cvq = cvq;
+	}
+
+	/* For virtio_user case (that is when hw->dev is NULL), we use
+	 * virtual address. And we need properly set _offset_, please see
+	 * VIRTIO_MBUF_DATA_DMA_ADDR in virtqueue.h for more information.
+	 */
+	if (!hw->virtio_user_dev)
+		vq->offset = offsetof(struct rte_mbuf, buf_iova);
+	else {
+		vq->vq_ring_mem = (uintptr_t)mz->addr;
+		vq->offset = offsetof(struct rte_mbuf, buf_addr);
+		if (queue_type == VTNET_TQ)
+			txvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
+		else if (queue_type == VTNET_CQ)
+			cvq->virtio_net_hdr_mem = (uintptr_t)hdr_mz->addr;
+	}
+
+	if (queue_type == VTNET_TQ) {
+		struct virtio_tx_region *txr;
+		unsigned int i;
+
+		txr = hdr_mz->addr;
+		memset(txr, 0, vq_size * sizeof(*txr));
+		for (i = 0; i < vq_size; i++) {
+			struct vring_desc *start_dp = txr[i].tx_indir;
+
+			/* first indirect descriptor is always the tx header */
+			if (!vtpci_packed_queue(hw)) {
+				vring_desc_init_split(start_dp,
+						      RTE_DIM(txr[i].tx_indir));
+				start_dp->addr = txvq->virtio_net_hdr_mem
+					+ i * sizeof(*txr)
+					+ offsetof(struct virtio_tx_region,
+						   tx_hdr);
+				start_dp->len = hw->vtnet_hdr_size;
+				start_dp->flags = VRING_DESC_F_NEXT;
+			}
+		}
+	}
+
+	if (VTPCI_OPS(hw)->setup_queue(hw, vq) < 0) {
+		PMD_INIT_LOG(ERR, "setup_queue failed");
+		return -EINVAL;
+	}
+
+	return 0;
+
+fail_q_alloc:
+	rte_free(sw_ring);
+	rte_memzone_free(hdr_mz);
+	rte_memzone_free(mz);
+	rte_free(vq);
+
+	return ret;
+}
+
+static void
+virtio_free_queues(struct virtio_hw *hw)
+{
+	uint16_t nr_vq = virtio_get_nr_vq(hw);
+	struct virtqueue *vq;
+	int queue_type;
+	uint16_t i;
+
+	if (hw->vqs == NULL)
+		return;
+
+	for (i = 0; i < nr_vq; i++) {
+		vq = hw->vqs[i];
+		if (!vq)
+			continue;
+
+		queue_type = virtio_get_queue_type(hw, i);
+		if (queue_type == VTNET_RQ) {
+			rte_free(vq->sw_ring);
+			rte_memzone_free(vq->rxq.mz);
+		} else if (queue_type == VTNET_TQ) {
+			rte_memzone_free(vq->txq.mz);
+			rte_memzone_free(vq->txq.virtio_net_hdr_mz);
+		} else {
+			rte_memzone_free(vq->cq.mz);
+			rte_memzone_free(vq->cq.virtio_net_hdr_mz);
+		}
+
+		rte_free(vq);
+		hw->vqs[i] = NULL;
+	}
+
+	rte_free(hw->vqs);
+	hw->vqs = NULL;
+}
+
+static int
+virtio_alloc_queues(struct rte_eth_dev *dev)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	uint16_t nr_vq = virtio_get_nr_vq(hw);
+	uint16_t i;
+	int ret;
+
+	hw->vqs = rte_zmalloc(NULL, sizeof(struct virtqueue *) * nr_vq, 0);
+	if (!hw->vqs) {
+		PMD_INIT_LOG(ERR, "failed to allocate vqs");
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < nr_vq; i++) {
+		ret = virtio_init_queue(dev, i);
+		if (ret < 0) {
+			virtio_free_queues(hw);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static void virtio_queues_unbind_intr(struct rte_eth_dev *dev);
+
+static void
+virtio_dev_close(struct rte_eth_dev *dev)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
+
+	PMD_INIT_LOG(DEBUG, "virtio_dev_close");
+
+	if (!hw->opened)
+		return;
+	hw->opened = false;
+
+	/* reset the NIC */
+	if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
+		VTPCI_OPS(hw)->set_config_irq(hw, VIRTIO_MSI_NO_VECTOR);
+	if (intr_conf->rxq)
+		virtio_queues_unbind_intr(dev);
+
+	if (intr_conf->lsc || intr_conf->rxq) {
+		virtio_intr_disable(dev);
+		rte_intr_efd_disable(dev->intr_handle);
+		rte_free(dev->intr_handle->intr_vec);
+		dev->intr_handle->intr_vec = NULL;
+	}
+
+	vtpci_reset(hw);
+	virtio_dev_free_mbufs(dev);
+	virtio_free_queues(hw);
+}
+
+static void
+virtio_dev_promiscuous_enable(struct rte_eth_dev *dev)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct virtio_pmd_ctrl ctrl;
+	int dlen[1];
+	int ret;
+
+	if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
+		PMD_INIT_LOG(INFO, "host does not support rx control");
+		return;
+	}
+
+	ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
+	ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
+	ctrl.data[0] = 1;
+	dlen[0] = 1;
+
+	ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
+	if (ret)
+		PMD_INIT_LOG(ERR, "Failed to enable promisc");
+}
+
+static void
+virtio_dev_promiscuous_disable(struct rte_eth_dev *dev)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct virtio_pmd_ctrl ctrl;
+	int dlen[1];
+	int ret;
+
+	if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
+		PMD_INIT_LOG(INFO, "host does not support rx control");
+		return;
+	}
+
+	ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
+	ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_PROMISC;
+	ctrl.data[0] = 0;
+	dlen[0] = 1;
+
+	ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
+	if (ret)
+		PMD_INIT_LOG(ERR, "Failed to disable promisc");
+}
+
+static void
+virtio_dev_allmulticast_enable(struct rte_eth_dev *dev)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct virtio_pmd_ctrl ctrl;
+	int dlen[1];
+	int ret;
+
+	if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
+		PMD_INIT_LOG(INFO, "host does not support rx control");
+		return;
+	}
+
+	ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
+	ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
+	ctrl.data[0] = 1;
+	dlen[0] = 1;
+
+	ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
+	if (ret)
+		PMD_INIT_LOG(ERR, "Failed to enable allmulticast");
+}
+
+static void
+virtio_dev_allmulticast_disable(struct rte_eth_dev *dev)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct virtio_pmd_ctrl ctrl;
+	int dlen[1];
+	int ret;
+
+	if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_RX)) {
+		PMD_INIT_LOG(INFO, "host does not support rx control");
+		return;
+	}
+
+	ctrl.hdr.class = VIRTIO_NET_CTRL_RX;
+	ctrl.hdr.cmd = VIRTIO_NET_CTRL_RX_ALLMULTI;
+	ctrl.data[0] = 0;
+	dlen[0] = 1;
+
+	ret = virtio_send_command(hw->cvq, &ctrl, dlen, 1);
+	if (ret)
+		PMD_INIT_LOG(ERR, "Failed to disable allmulticast");
+}
+
+#define VLAN_TAG_LEN           4    /* 802.3ac tag (not DMA'd) */
+static int
+virtio_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
+				 hw->vtnet_hdr_size;
+	uint32_t frame_size = mtu + ether_hdr_len;
+	uint32_t max_frame_size = hw->max_mtu + ether_hdr_len;
+
+	max_frame_size = RTE_MIN(max_frame_size, VIRTIO_MAX_RX_PKTLEN);
+
+	if (mtu < ETHER_MIN_MTU || frame_size > max_frame_size) {
+		PMD_INIT_LOG(ERR, "MTU should be between %d and %d",
+			ETHER_MIN_MTU, max_frame_size - ether_hdr_len);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int
+virtio_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
+	struct virtqueue *vq = rxvq->vq;
+
+	virtqueue_enable_intr(vq);
+	virtio_mb(hw->weak_barriers);
+	return 0;
+}
+
+static int
+virtio_dev_rx_queue_intr_disable(struct rte_eth_dev *dev, uint16_t queue_id)
+{
+	struct virtnet_rx *rxvq = dev->data->rx_queues[queue_id];
+	struct virtqueue *vq = rxvq->vq;
+
+	virtqueue_disable_intr(vq);
+	return 0;
+}
+
+/*
+ * dev_ops for virtio, bare necessities for basic operation
+ */
+static const struct eth_dev_ops virtio_eth_dev_ops = {
+	.dev_configure           = virtio_dev_configure,
+	.dev_start               = virtio_dev_start,
+	.dev_stop                = virtio_dev_stop,
+	.dev_close               = virtio_dev_close,
+	.promiscuous_enable      = virtio_dev_promiscuous_enable,
+	.promiscuous_disable     = virtio_dev_promiscuous_disable,
+	.allmulticast_enable     = virtio_dev_allmulticast_enable,
+	.allmulticast_disable    = virtio_dev_allmulticast_disable,
+	.mtu_set                 = virtio_mtu_set,
+	.dev_infos_get           = virtio_dev_info_get,
+	.stats_get               = virtio_dev_stats_get,
+	.xstats_get              = virtio_dev_xstats_get,
+	.xstats_get_names        = virtio_dev_xstats_get_names,
+	.stats_reset             = virtio_dev_stats_reset,
+	.xstats_reset            = virtio_dev_stats_reset,
+	.link_update             = virtio_dev_link_update,
+	.vlan_offload_set        = virtio_dev_vlan_offload_set,
+	.rx_queue_setup          = virtio_dev_rx_queue_setup,
+	.rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
+	.rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
+	.rx_queue_release        = virtio_dev_queue_release,
+	.rx_descriptor_done      = virtio_dev_rx_queue_done,
+	.tx_queue_setup          = virtio_dev_tx_queue_setup,
+	.tx_queue_release        = virtio_dev_queue_release,
+	/* collect stats per queue */
+	.queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
+	.vlan_filter_set         = virtio_vlan_filter_set,
+	.mac_addr_add            = virtio_mac_addr_add,
+	.mac_addr_remove         = virtio_mac_addr_remove,
+	.mac_addr_set            = virtio_mac_addr_set,
+};
+
+/*
+ * dev_ops for virtio-user in secondary processes, as we just have
+ * some limited supports currently.
+ */
+const struct eth_dev_ops virtio_user_secondary_eth_dev_ops = {
+	.dev_infos_get           = virtio_dev_info_get,
+	.stats_get               = virtio_dev_stats_get,
+	.xstats_get              = virtio_dev_xstats_get,
+	.xstats_get_names        = virtio_dev_xstats_get_names,
+	.stats_reset             = virtio_dev_stats_reset,
+	.xstats_reset            = virtio_dev_stats_reset,
+	/* collect stats per queue */
+	.queue_stats_mapping_set = virtio_dev_queue_stats_mapping_set,
+};
+
+static void
+virtio_update_stats(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
+{
+	unsigned i;
+
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		const struct virtnet_tx *txvq = dev->data->tx_queues[i];
+		if (txvq == NULL)
+			continue;
+
+		stats->opackets += txvq->stats.packets;
+		stats->obytes += txvq->stats.bytes;
+		stats->oerrors += txvq->stats.errors;
+
+		if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+			stats->q_opackets[i] = txvq->stats.packets;
+			stats->q_obytes[i] = txvq->stats.bytes;
+		}
+	}
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		const struct virtnet_rx *rxvq = dev->data->rx_queues[i];
+		if (rxvq == NULL)
+			continue;
+
+		stats->ipackets += rxvq->stats.packets;
+		stats->ibytes += rxvq->stats.bytes;
+		stats->ierrors += rxvq->stats.errors;
+
+		if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+			stats->q_ipackets[i] = rxvq->stats.packets;
+			stats->q_ibytes[i] = rxvq->stats.bytes;
+		}
+	}
+
+	stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
+}
+
+static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
+				       struct rte_eth_xstat_name *xstats_names,
+				       __rte_unused unsigned limit)
+{
+	unsigned i;
+	unsigned count = 0;
+	unsigned t;
+
+	unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
+		dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
+
+	if (xstats_names != NULL) {
+		/* Note: limit checked in rte_eth_xstats_names() */
+
+		for (i = 0; i < dev->data->nb_rx_queues; i++) {
+			struct virtnet_rx *rxvq = dev->data->rx_queues[i];
+			if (rxvq == NULL)
+				continue;
+			for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
+				snprintf(xstats_names[count].name,
+					sizeof(xstats_names[count].name),
+					"rx_q%u_%s", i,
+					rte_virtio_rxq_stat_strings[t].name);
+				count++;
+			}
+		}
+
+		for (i = 0; i < dev->data->nb_tx_queues; i++) {
+			struct virtnet_tx *txvq = dev->data->tx_queues[i];
+			if (txvq == NULL)
+				continue;
+			for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
+				snprintf(xstats_names[count].name,
+					sizeof(xstats_names[count].name),
+					"tx_q%u_%s", i,
+					rte_virtio_txq_stat_strings[t].name);
+				count++;
+			}
+		}
+		return count;
+	}
+	return nstats;
+}
+
+static int
+virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstat *xstats,
+		      unsigned n)
+{
+	unsigned i;
+	unsigned count = 0;
+
+	unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_TXQ_XSTATS +
+		dev->data->nb_rx_queues * VIRTIO_NB_RXQ_XSTATS;
+
+	if (n < nstats)
+		return nstats;
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		struct virtnet_rx *rxvq = dev->data->rx_queues[i];
+
+		if (rxvq == NULL)
+			continue;
+
+		unsigned t;
+
+		for (t = 0; t < VIRTIO_NB_RXQ_XSTATS; t++) {
+			xstats[count].value = *(uint64_t *)(((char *)rxvq) +
+				rte_virtio_rxq_stat_strings[t].offset);
+			xstats[count].id = count;
+			count++;
+		}
+	}
+
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		struct virtnet_tx *txvq = dev->data->tx_queues[i];
+
+		if (txvq == NULL)
+			continue;
+
+		unsigned t;
+
+		for (t = 0; t < VIRTIO_NB_TXQ_XSTATS; t++) {
+			xstats[count].value = *(uint64_t *)(((char *)txvq) +
+				rte_virtio_txq_stat_strings[t].offset);
+			xstats[count].id = count;
+			count++;
+		}
+	}
+
+	return count;
+}
+
+static int
+virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
+{
+	virtio_update_stats(dev, stats);
+
+	return 0;
+}
+
+static void
+virtio_dev_stats_reset(struct rte_eth_dev *dev)
+{
+	unsigned int i;
+
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		struct virtnet_tx *txvq = dev->data->tx_queues[i];
+		if (txvq == NULL)
+			continue;
+
+		txvq->stats.packets = 0;
+		txvq->stats.bytes = 0;
+		txvq->stats.errors = 0;
+		txvq->stats.multicast = 0;
+		txvq->stats.broadcast = 0;
+		memset(txvq->stats.size_bins, 0,
+		       sizeof(txvq->stats.size_bins[0]) * 8);
+	}
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		struct virtnet_rx *rxvq = dev->data->rx_queues[i];
+		if (rxvq == NULL)
+			continue;
+
+		rxvq->stats.packets = 0;
+		rxvq->stats.bytes = 0;
+		rxvq->stats.errors = 0;
+		rxvq->stats.multicast = 0;
+		rxvq->stats.broadcast = 0;
+		memset(rxvq->stats.size_bins, 0,
+		       sizeof(rxvq->stats.size_bins[0]) * 8);
+	}
+}
+
+static void
+virtio_set_hwaddr(struct virtio_hw *hw)
+{
+	vtpci_write_dev_config(hw,
+			offsetof(struct virtio_net_config, mac),
+			&hw->mac_addr, ETHER_ADDR_LEN);
+}
+
+static void
+virtio_get_hwaddr(struct virtio_hw *hw)
+{
+	if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC)) {
+		vtpci_read_dev_config(hw,
+			offsetof(struct virtio_net_config, mac),
+			&hw->mac_addr, ETHER_ADDR_LEN);
+	} else {
+		eth_random_addr(&hw->mac_addr[0]);
+		virtio_set_hwaddr(hw);
+	}
+}
+
+static int
+virtio_mac_table_set(struct virtio_hw *hw,
+		     const struct virtio_net_ctrl_mac *uc,
+		     const struct virtio_net_ctrl_mac *mc)
+{
+	struct virtio_pmd_ctrl ctrl;
+	int err, len[2];
+
+	if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
+		PMD_DRV_LOG(INFO, "host does not support mac table");
+		return -1;
+	}
+
+	ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
+	ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_TABLE_SET;
+
+	len[0] = uc->entries * ETHER_ADDR_LEN + sizeof(uc->entries);
+	memcpy(ctrl.data, uc, len[0]);
+
+	len[1] = mc->entries * ETHER_ADDR_LEN + sizeof(mc->entries);
+	memcpy(ctrl.data + len[0], mc, len[1]);
+
+	err = virtio_send_command(hw->cvq, &ctrl, len, 2);
+	if (err != 0)
+		PMD_DRV_LOG(NOTICE, "mac table set failed: %d", err);
+	return err;
+}
+
+static int
+virtio_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
+		    uint32_t index, uint32_t vmdq __rte_unused)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	const struct ether_addr *addrs = dev->data->mac_addrs;
+	unsigned int i;
+	struct virtio_net_ctrl_mac *uc, *mc;
+
+	if (index >= VIRTIO_MAX_MAC_ADDRS) {
+		PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
+		return -EINVAL;
+	}
+
+	uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
+	uc->entries = 0;
+	mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
+	mc->entries = 0;
+
+	for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
+		const struct ether_addr *addr
+			= (i == index) ? mac_addr : addrs + i;
+		struct virtio_net_ctrl_mac *tbl
+			= is_multicast_ether_addr(addr) ? mc : uc;
+
+		memcpy(&tbl->macs[tbl->entries++], addr, ETHER_ADDR_LEN);
+	}
+
+	return virtio_mac_table_set(hw, uc, mc);
+}
+
+static void
+virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct ether_addr *addrs = dev->data->mac_addrs;
+	struct virtio_net_ctrl_mac *uc, *mc;
+	unsigned int i;
+
+	if (index >= VIRTIO_MAX_MAC_ADDRS) {
+		PMD_DRV_LOG(ERR, "mac address index %u out of range", index);
+		return;
+	}
+
+	uc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(uc->entries));
+	uc->entries = 0;
+	mc = alloca(VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN + sizeof(mc->entries));
+	mc->entries = 0;
+
+	for (i = 0; i < VIRTIO_MAX_MAC_ADDRS; i++) {
+		struct virtio_net_ctrl_mac *tbl;
+
+		if (i == index || is_zero_ether_addr(addrs + i))
+			continue;
+
+		tbl = is_multicast_ether_addr(addrs + i) ? mc : uc;
+		memcpy(&tbl->macs[tbl->entries++], addrs + i, ETHER_ADDR_LEN);
+	}
+
+	virtio_mac_table_set(hw, uc, mc);
+}
+
+static int
+virtio_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+
+	memcpy(hw->mac_addr, mac_addr, ETHER_ADDR_LEN);
+
+	/* Use atomic update if available */
+	if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_MAC_ADDR)) {
+		struct virtio_pmd_ctrl ctrl;
+		int len = ETHER_ADDR_LEN;
+
+		ctrl.hdr.class = VIRTIO_NET_CTRL_MAC;
+		ctrl.hdr.cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET;
+
+		memcpy(ctrl.data, mac_addr, ETHER_ADDR_LEN);
+		return virtio_send_command(hw->cvq, &ctrl, &len, 1);
+	}
+
+	if (!vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
+		return -ENOTSUP;
+
+	virtio_set_hwaddr(hw);
+	return 0;
+}
+
+static int
+virtio_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct virtio_pmd_ctrl ctrl;
+	int len;
+
+	if (!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN))
+		return -ENOTSUP;
+
+	ctrl.hdr.class = VIRTIO_NET_CTRL_VLAN;
+	ctrl.hdr.cmd = on ? VIRTIO_NET_CTRL_VLAN_ADD : VIRTIO_NET_CTRL_VLAN_DEL;
+	memcpy(ctrl.data, &vlan_id, sizeof(vlan_id));
+	len = sizeof(vlan_id);
+
+	return virtio_send_command(hw->cvq, &ctrl, &len, 1);
+}
+
+static int
+virtio_intr_enable(struct rte_eth_dev *dev)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+
+	if (rte_intr_enable(dev->intr_handle) < 0)
+		return -1;
+
+	if (!hw->virtio_user_dev)
+		hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
+
+	return 0;
+}
+
+static int
+virtio_intr_disable(struct rte_eth_dev *dev)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+
+	if (rte_intr_disable(dev->intr_handle) < 0)
+		return -1;
+
+	if (!hw->virtio_user_dev)
+		hw->use_msix = vtpci_msix_detect(RTE_ETH_DEV_TO_PCI(dev));
+
+	return 0;
+}
+
+static int
+virtio_negotiate_features(struct virtio_hw *hw, uint64_t req_features)
+{
+	uint64_t host_features;
+
+	/* Prepare guest_features: feature that driver wants to support */
+	PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
+		req_features);
+
+	/* Read device(host) feature bits */
+	host_features = VTPCI_OPS(hw)->get_features(hw);
+	PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
+		host_features);
+
+	/* If supported, ensure MTU value is valid before acknowledging it. */
+	if (host_features & req_features & (1ULL << VIRTIO_NET_F_MTU)) {
+		struct virtio_net_config config;
+
+		vtpci_read_dev_config(hw,
+			offsetof(struct virtio_net_config, mtu),
+			&config.mtu, sizeof(config.mtu));
+
+		if (config.mtu < ETHER_MIN_MTU)
+			req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
+	}
+
+	/*
+	 * Negotiate features: Subset of device feature bits are written back
+	 * guest feature bits.
+	 */
+	hw->guest_features = req_features;
+	hw->guest_features = vtpci_negotiate_features(hw, host_features);
+	PMD_INIT_LOG(DEBUG, "features after negotiate = %" PRIx64,
+		hw->guest_features);
+
+	if (hw->modern) {
+		if (!vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) {
+			PMD_INIT_LOG(ERR,
+				"VIRTIO_F_VERSION_1 features is not enabled.");
+			return -1;
+		}
+		vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_FEATURES_OK);
+		if (!(vtpci_get_status(hw) & VIRTIO_CONFIG_STATUS_FEATURES_OK)) {
+			PMD_INIT_LOG(ERR,
+				"failed to set FEATURES_OK status!");
+			return -1;
+		}
+	}
+
+	hw->req_guest_features = req_features;
+
+	return 0;
+}
+
+int
+virtio_dev_pause(struct rte_eth_dev *dev)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+
+	rte_spinlock_lock(&hw->state_lock);
+
+	if (hw->started == 0) {
+		/* Device is just stopped. */
+		rte_spinlock_unlock(&hw->state_lock);
+		return -1;
+	}
+	hw->started = 0;
+	/*
+	 * Prevent the worker threads from touching queues to avoid contention,
+	 * 1 ms should be enough for the ongoing Tx function to finish.
+	 */
+	rte_delay_ms(1);
+	return 0;
+}
+
+/*
+ * Recover hw state to let the worker threads continue.
+ */
+void
+virtio_dev_resume(struct rte_eth_dev *dev)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+
+	hw->started = 1;
+	rte_spinlock_unlock(&hw->state_lock);
+}
+
+/*
+ * Should be called only after device is paused.
+ */
+int
+virtio_inject_pkts(struct rte_eth_dev *dev, struct rte_mbuf **tx_pkts,
+		int nb_pkts)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct virtnet_tx *txvq = dev->data->tx_queues[0];
+	int ret;
+
+	hw->inject_pkts = tx_pkts;
+	ret = dev->tx_pkt_burst(txvq, tx_pkts, nb_pkts);
+	hw->inject_pkts = NULL;
+
+	return ret;
+}
+
+static void
+virtio_notify_peers(struct rte_eth_dev *dev)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct virtnet_rx *rxvq;
+	struct rte_mbuf *rarp_mbuf;
+
+	if (!dev->data->rx_queues)
+		return;
+
+	rxvq = dev->data->rx_queues[0];
+	if (!rxvq)
+		return;
+
+	rarp_mbuf = rte_net_make_rarp_packet(rxvq->mpool,
+			(struct ether_addr *)hw->mac_addr);
+	if (rarp_mbuf == NULL) {
+		PMD_DRV_LOG(ERR, "failed to make RARP packet.");
+		return;
+	}
+
+	/* If virtio port just stopped, no need to send RARP */
+	if (virtio_dev_pause(dev) < 0) {
+		rte_pktmbuf_free(rarp_mbuf);
+		return;
+	}
+
+	virtio_inject_pkts(dev, &rarp_mbuf, 1);
+	virtio_dev_resume(dev);
+}
+
+static void
+virtio_ack_link_announce(struct rte_eth_dev *dev)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct virtio_pmd_ctrl ctrl;
+
+	ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
+	ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
+
+	virtio_send_command(hw->cvq, &ctrl, NULL, 0);
+}
+
+/*
+ * Process virtio config changed interrupt. Call the callback
+ * if link state changed, generate gratuitous RARP packet if
+ * the status indicates an ANNOUNCE.
+ */
+void
+virtio_interrupt_handler(void *param)
+{
+	struct rte_eth_dev *dev = param;
+	struct virtio_hw *hw = dev->data->dev_private;
+	uint8_t isr;
+	uint16_t status;
+
+	/* Read interrupt status which clears interrupt */
+	isr = vtpci_isr(hw);
+	PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
+
+	if (virtio_intr_enable(dev) < 0)
+		PMD_DRV_LOG(ERR, "interrupt enable failed");
+
+	if (isr & VIRTIO_PCI_ISR_CONFIG) {
+		if (virtio_dev_link_update(dev, 0) == 0)
+			_rte_eth_dev_callback_process(dev,
+						      RTE_ETH_EVENT_INTR_LSC,
+						      NULL);
+
+		if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
+			vtpci_read_dev_config(hw,
+				offsetof(struct virtio_net_config, status),
+				&status, sizeof(status));
+			if (status & VIRTIO_NET_S_ANNOUNCE) {
+				virtio_notify_peers(dev);
+				if (hw->cvq)
+					virtio_ack_link_announce(dev);
+			}
+		}
+	}
+}
+
+/* set rx and tx handlers according to what is supported */
+static void
+set_rxtx_funcs(struct rte_eth_dev *eth_dev)
+{
+	struct virtio_hw *hw = eth_dev->data->dev_private;
+
+	if (vtpci_packed_queue(hw)) {
+		PMD_INIT_LOG(INFO,
+			"virtio: using packed ring %s Tx path on port %u",
+			hw->use_inorder_tx ? "inorder" : "standard",
+			eth_dev->data->port_id);
+		eth_dev->tx_pkt_burst = virtio_xmit_pkts_packed;
+	} else {
+		if (hw->use_inorder_tx) {
+			PMD_INIT_LOG(INFO, "virtio: using inorder Tx path on port %u",
+				eth_dev->data->port_id);
+			eth_dev->tx_pkt_burst = virtio_xmit_pkts_inorder;
+		} else {
+			PMD_INIT_LOG(INFO, "virtio: using standard Tx path on port %u",
+				eth_dev->data->port_id);
+			eth_dev->tx_pkt_burst = virtio_xmit_pkts;
+		}
+	}
+
+	if (vtpci_packed_queue(hw)) {
+		if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
+			PMD_INIT_LOG(INFO,
+				"virtio: using packed ring mergeable buffer Rx path on port %u",
+				eth_dev->data->port_id);
+			eth_dev->rx_pkt_burst =
+				&virtio_recv_mergeable_pkts_packed;
+		} else {
+			PMD_INIT_LOG(INFO,
+				"virtio: using packed ring standard Rx path on port %u",
+				eth_dev->data->port_id);
+			eth_dev->rx_pkt_burst = &virtio_recv_pkts_packed;
+		}
+	} else {
+		if (hw->use_simple_rx) {
+			PMD_INIT_LOG(INFO, "virtio: using simple Rx path on port %u",
+				eth_dev->data->port_id);
+			eth_dev->rx_pkt_burst = virtio_recv_pkts_vec;
+		} else if (hw->use_inorder_rx) {
+			PMD_INIT_LOG(INFO,
+				"virtio: using inorder Rx path on port %u",
+				eth_dev->data->port_id);
+			eth_dev->rx_pkt_burst =	&virtio_recv_pkts_inorder;
+		} else if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
+			PMD_INIT_LOG(INFO,
+				"virtio: using mergeable buffer Rx path on port %u",
+				eth_dev->data->port_id);
+			eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
+		} else {
+			PMD_INIT_LOG(INFO, "virtio: using standard Rx path on port %u",
+				eth_dev->data->port_id);
+			eth_dev->rx_pkt_burst = &virtio_recv_pkts;
+		}
+	}
+
+}
+
+/* Only support 1:1 queue/interrupt mapping so far.
+ * TODO: support n:1 queue/interrupt mapping when there are limited number of
+ * interrupt vectors (<N+1).
+ */
+static int
+virtio_queues_bind_intr(struct rte_eth_dev *dev)
+{
+	uint32_t i;
+	struct virtio_hw *hw = dev->data->dev_private;
+
+	PMD_INIT_LOG(INFO, "queue/interrupt binding");
+	for (i = 0; i < dev->data->nb_rx_queues; ++i) {
+		dev->intr_handle->intr_vec[i] = i + 1;
+		if (VTPCI_OPS(hw)->set_queue_irq(hw, hw->vqs[i * 2], i + 1) ==
+						 VIRTIO_MSI_NO_VECTOR) {
+			PMD_DRV_LOG(ERR, "failed to set queue vector");
+			return -EBUSY;
+		}
+	}
+
+	return 0;
+}
+
+static void
+virtio_queues_unbind_intr(struct rte_eth_dev *dev)
+{
+	uint32_t i;
+	struct virtio_hw *hw = dev->data->dev_private;
+
+	PMD_INIT_LOG(INFO, "queue/interrupt unbinding");
+	for (i = 0; i < dev->data->nb_rx_queues; ++i)
+		VTPCI_OPS(hw)->set_queue_irq(hw,
+					     hw->vqs[i * VTNET_CQ],
+					     VIRTIO_MSI_NO_VECTOR);
+}
+
+static int
+virtio_configure_intr(struct rte_eth_dev *dev)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+
+	if (!rte_intr_cap_multiple(dev->intr_handle)) {
+		PMD_INIT_LOG(ERR, "Multiple intr vector not supported");
+		return -ENOTSUP;
+	}
+
+	if (rte_intr_efd_enable(dev->intr_handle, dev->data->nb_rx_queues)) {
+		PMD_INIT_LOG(ERR, "Fail to create eventfd");
+		return -1;
+	}
+
+	if (!dev->intr_handle->intr_vec) {
+		dev->intr_handle->intr_vec =
+			rte_zmalloc("intr_vec",
+				    hw->max_queue_pairs * sizeof(int), 0);
+		if (!dev->intr_handle->intr_vec) {
+			PMD_INIT_LOG(ERR, "Failed to allocate %u rxq vectors",
+				     hw->max_queue_pairs);
+			return -ENOMEM;
+		}
+	}
+
+	/* Re-register callback to update max_intr */
+	rte_intr_callback_unregister(dev->intr_handle,
+				     virtio_interrupt_handler,
+				     dev);
+	rte_intr_callback_register(dev->intr_handle,
+				   virtio_interrupt_handler,
+				   dev);
+
+	/* DO NOT try to remove this! This function will enable msix, or QEMU
+	 * will encounter SIGSEGV when DRIVER_OK is sent.
+	 * And for legacy devices, this should be done before queue/vec binding
+	 * to change the config size from 20 to 24, or VIRTIO_MSI_QUEUE_VECTOR
+	 * (22) will be ignored.
+	 */
+	if (virtio_intr_enable(dev) < 0) {
+		PMD_DRV_LOG(ERR, "interrupt enable failed");
+		return -1;
+	}
+
+	if (virtio_queues_bind_intr(dev) < 0) {
+		PMD_INIT_LOG(ERR, "Failed to bind queue/interrupt");
+		return -1;
+	}
+
+	return 0;
+}
+
+/* reset device and renegotiate features if needed */
+static int
+virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features)
+{
+	struct virtio_hw *hw = eth_dev->data->dev_private;
+	struct virtio_net_config *config;
+	struct virtio_net_config local_config;
+	struct rte_pci_device *pci_dev = NULL;
+	int ret;
+
+	/* Reset the device although not necessary at startup */
+	vtpci_reset(hw);
+
+	if (hw->vqs) {
+		virtio_dev_free_mbufs(eth_dev);
+		virtio_free_queues(hw);
+	}
+
+	/* Tell the host we've noticed this device. */
+	vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_ACK);
+
+	/* Tell the host we've known how to drive the device. */
+	vtpci_set_status(hw, VIRTIO_CONFIG_STATUS_DRIVER);
+	if (virtio_negotiate_features(hw, req_features) < 0)
+		return -1;
+
+	hw->weak_barriers = !vtpci_with_feature(hw, VIRTIO_F_ORDER_PLATFORM);
+
+	if (!hw->virtio_user_dev) {
+		pci_dev = RTE_ETH_DEV_TO_PCI(eth_dev);
+		rte_eth_copy_pci_info(eth_dev, pci_dev);
+	}
+
+	/* If host does not support both status and MSI-X then disable LSC */
+	if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS) &&
+	    hw->use_msix != VIRTIO_MSIX_NONE)
+		eth_dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
+	else
+		eth_dev->data->dev_flags &= ~RTE_ETH_DEV_INTR_LSC;
+
+	/* Setting up rx_header size for the device */
+	if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) ||
+	    vtpci_with_feature(hw, VIRTIO_F_VERSION_1) ||
+	    vtpci_with_feature(hw, VIRTIO_F_RING_PACKED))
+		hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf);
+	else
+		hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr);
+
+	/* Copy the permanent MAC address to: virtio_hw */
+	virtio_get_hwaddr(hw);
+	ether_addr_copy((struct ether_addr *) hw->mac_addr,
+			&eth_dev->data->mac_addrs[0]);
+	PMD_INIT_LOG(DEBUG,
+		     "PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
+		     hw->mac_addr[0], hw->mac_addr[1], hw->mac_addr[2],
+		     hw->mac_addr[3], hw->mac_addr[4], hw->mac_addr[5]);
+
+	if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ)) {
+		config = &local_config;
+
+		vtpci_read_dev_config(hw,
+			offsetof(struct virtio_net_config, mac),
+			&config->mac, sizeof(config->mac));
+
+		if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
+			vtpci_read_dev_config(hw,
+				offsetof(struct virtio_net_config, status),
+				&config->status, sizeof(config->status));
+		} else {
+			PMD_INIT_LOG(DEBUG,
+				     "VIRTIO_NET_F_STATUS is not supported");
+			config->status = 0;
+		}
+
+		if (vtpci_with_feature(hw, VIRTIO_NET_F_MQ)) {
+			vtpci_read_dev_config(hw,
+				offsetof(struct virtio_net_config, max_virtqueue_pairs),
+				&config->max_virtqueue_pairs,
+				sizeof(config->max_virtqueue_pairs));
+		} else {
+			PMD_INIT_LOG(DEBUG,
+				     "VIRTIO_NET_F_MQ is not supported");
+			config->max_virtqueue_pairs = 1;
+		}
+
+		hw->max_queue_pairs = config->max_virtqueue_pairs;
+
+		if (vtpci_with_feature(hw, VIRTIO_NET_F_MTU)) {
+			vtpci_read_dev_config(hw,
+				offsetof(struct virtio_net_config, mtu),
+				&config->mtu,
+				sizeof(config->mtu));
+
+			/*
+			 * MTU value has already been checked at negotiation
+			 * time, but check again in case it has changed since
+			 * then, which should not happen.
+			 */
+			if (config->mtu < ETHER_MIN_MTU) {
+				PMD_INIT_LOG(ERR, "invalid max MTU value (%u)",
+						config->mtu);
+				return -1;
+			}
+
+			hw->max_mtu = config->mtu;
+			/* Set initial MTU to maximum one supported by vhost */
+			eth_dev->data->mtu = config->mtu;
+
+		} else {
+			hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
+				VLAN_TAG_LEN - hw->vtnet_hdr_size;
+		}
+
+		PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=%d",
+				config->max_virtqueue_pairs);
+		PMD_INIT_LOG(DEBUG, "config->status=%d", config->status);
+		PMD_INIT_LOG(DEBUG,
+				"PORT MAC: %02X:%02X:%02X:%02X:%02X:%02X",
+				config->mac[0], config->mac[1],
+				config->mac[2], config->mac[3],
+				config->mac[4], config->mac[5]);
+	} else {
+		PMD_INIT_LOG(DEBUG, "config->max_virtqueue_pairs=1");
+		hw->max_queue_pairs = 1;
+		hw->max_mtu = VIRTIO_MAX_RX_PKTLEN - ETHER_HDR_LEN -
+			VLAN_TAG_LEN - hw->vtnet_hdr_size;
+	}
+
+	ret = virtio_alloc_queues(eth_dev);
+	if (ret < 0)
+		return ret;
+
+	if (eth_dev->data->dev_conf.intr_conf.rxq) {
+		if (virtio_configure_intr(eth_dev) < 0) {
+			PMD_INIT_LOG(ERR, "failed to configure interrupt");
+			return -1;
+		}
+	}
+
+	vtpci_reinit_complete(hw);
+
+	if (pci_dev)
+		PMD_INIT_LOG(DEBUG, "port %d vendorID=0x%x deviceID=0x%x",
+			eth_dev->data->port_id, pci_dev->id.vendor_id,
+			pci_dev->id.device_id);
+
+	return 0;
+}
+
+/*
+ * Remap the PCI device again (IO port map for legacy device and
+ * memory map for modern device), so that the secondary process
+ * could have the PCI initiated correctly.
+ */
+static int
+virtio_remap_pci(struct rte_pci_device *pci_dev, struct virtio_hw *hw)
+{
+	if (hw->modern) {
+		/*
+		 * We don't have to re-parse the PCI config space, since
+		 * rte_pci_map_device() makes sure the mapped address
+		 * in secondary process would equal to the one mapped in
+		 * the primary process: error will be returned if that
+		 * requirement is not met.
+		 *
+		 * That said, we could simply reuse all cap pointers
+		 * (such as dev_cfg, common_cfg, etc.) parsed from the
+		 * primary process, which is stored in shared memory.
+		 */
+		if (rte_pci_map_device(pci_dev)) {
+			PMD_INIT_LOG(DEBUG, "failed to map pci device!");
+			return -1;
+		}
+	} else {
+		if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0)
+			return -1;
+	}
+
+	return 0;
+}
+
+static void
+virtio_set_vtpci_ops(struct virtio_hw *hw)
+{
+#ifdef RTE_VIRTIO_USER
+	if (hw->virtio_user_dev)
+		VTPCI_OPS(hw) = &virtio_user_ops;
+	else
+#endif
+	if (hw->modern)
+		VTPCI_OPS(hw) = &modern_ops;
+	else
+		VTPCI_OPS(hw) = &legacy_ops;
+}
+
+/*
+ * This function is based on probe() function in virtio_pci.c
+ * It returns 0 on success.
+ */
+int
+eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
+{
+	struct virtio_hw *hw = eth_dev->data->dev_private;
+	int ret;
+
+	RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr_mrg_rxbuf));
+
+	eth_dev->dev_ops = &virtio_eth_dev_ops;
+
+	if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
+		if (!hw->virtio_user_dev) {
+			ret = virtio_remap_pci(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
+			if (ret)
+				return ret;
+		}
+
+		virtio_set_vtpci_ops(hw);
+		set_rxtx_funcs(eth_dev);
+
+		return 0;
+	}
+
+	/* Allocate memory for storing MAC addresses */
+	eth_dev->data->mac_addrs = rte_zmalloc("virtio", VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN, 0);
+	if (eth_dev->data->mac_addrs == NULL) {
+		PMD_INIT_LOG(ERR,
+			"Failed to allocate %d bytes needed to store MAC addresses",
+			VIRTIO_MAX_MAC_ADDRS * ETHER_ADDR_LEN);
+		return -ENOMEM;
+	}
+
+	hw->port_id = eth_dev->data->port_id;
+	/* For virtio_user case the hw->virtio_user_dev is populated by
+	 * virtio_user_eth_dev_alloc() before eth_virtio_dev_init() is called.
+	 */
+	if (!hw->virtio_user_dev) {
+		ret = vtpci_init(RTE_ETH_DEV_TO_PCI(eth_dev), hw);
+		if (ret)
+			goto out;
+	}
+
+	/* reset device and negotiate default features */
+	ret = virtio_init_device(eth_dev, VIRTIO_PMD_DEFAULT_GUEST_FEATURES);
+	if (ret < 0)
+		goto out;
+
+	return 0;
+
+out:
+	rte_free(eth_dev->data->mac_addrs);
+	eth_dev->data->mac_addrs = NULL;
+	return ret;
+}
+
+static int
+eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
+{
+	PMD_INIT_FUNC_TRACE();
+
+	if (rte_eal_process_type() == RTE_PROC_SECONDARY)
+		return 0;
+
+	virtio_dev_stop(eth_dev);
+	virtio_dev_close(eth_dev);
+
+	eth_dev->dev_ops = NULL;
+	eth_dev->tx_pkt_burst = NULL;
+	eth_dev->rx_pkt_burst = NULL;
+
+	if (eth_dev->device)
+		rte_pci_unmap_device(RTE_ETH_DEV_TO_PCI(eth_dev));
+
+	PMD_INIT_LOG(DEBUG, "dev_uninit completed");
+
+	return 0;
+}
+
+static int vdpa_check_handler(__rte_unused const char *key,
+		const char *value, __rte_unused void *opaque)
+{
+	if (strcmp(value, "1"))
+		return -1;
+
+	return 0;
+}
+
+static int
+vdpa_mode_selected(struct rte_devargs *devargs)
+{
+	struct rte_kvargs *kvlist;
+	const char *key = "vdpa";
+	int ret = 0;
+
+	if (devargs == NULL)
+		return 0;
+
+	kvlist = rte_kvargs_parse(devargs->args, NULL);
+	if (kvlist == NULL)
+		return 0;
+
+	if (!rte_kvargs_count(kvlist, key))
+		goto exit;
+
+	/* vdpa mode selected when there's a key-value pair: vdpa=1 */
+	if (rte_kvargs_process(kvlist, key,
+				vdpa_check_handler, NULL) < 0) {
+		goto exit;
+	}
+	ret = 1;
+
+exit:
+	rte_kvargs_free(kvlist);
+	return ret;
+}
+
+static int eth_virtio_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
+	struct rte_pci_device *pci_dev)
+{
+	if (rte_eal_iopl_init() != 0) {
+		PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
+		return 1;
+	}
+
+	/* virtio pmd skips probe if device needs to work in vdpa mode */
+	if (vdpa_mode_selected(pci_dev->device.devargs))
+		return 1;
+
+	return rte_eth_dev_pci_generic_probe(pci_dev, sizeof(struct virtio_hw),
+		eth_virtio_dev_init);
+}
+
+static int eth_virtio_pci_remove(struct rte_pci_device *pci_dev)
+{
+	return rte_eth_dev_pci_generic_remove(pci_dev, eth_virtio_dev_uninit);
+}
+
+static struct rte_pci_driver rte_virtio_pmd = {
+	.driver = {
+		.name = "net_virtio",
+	},
+	.id_table = pci_id_virtio_map,
+	.drv_flags = 0,
+	.probe = eth_virtio_pci_probe,
+	.remove = eth_virtio_pci_remove,
+};
+
+RTE_INIT(rte_virtio_pmd_init)
+{
+	rte_eal_iopl_init();
+	rte_pci_register(&rte_virtio_pmd);
+}
+
+static bool
+rx_offload_enabled(struct virtio_hw *hw)
+{
+	return vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM) ||
+		vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
+		vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6);
+}
+
+static bool
+tx_offload_enabled(struct virtio_hw *hw)
+{
+	return vtpci_with_feature(hw, VIRTIO_NET_F_CSUM) ||
+		vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO4) ||
+		vtpci_with_feature(hw, VIRTIO_NET_F_HOST_TSO6);
+}
+
+/*
+ * Configure virtio device
+ * It returns 0 on success.
+ */
+static int
+virtio_dev_configure(struct rte_eth_dev *dev)
+{
+	const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
+	const struct rte_eth_txmode *txmode = &dev->data->dev_conf.txmode;
+	struct virtio_hw *hw = dev->data->dev_private;
+	uint32_t ether_hdr_len = ETHER_HDR_LEN + VLAN_TAG_LEN +
+		hw->vtnet_hdr_size;
+	uint64_t rx_offloads = rxmode->offloads;
+	uint64_t tx_offloads = txmode->offloads;
+	uint64_t req_features;
+	int ret;
+
+	PMD_INIT_LOG(DEBUG, "configure");
+	req_features = VIRTIO_PMD_DEFAULT_GUEST_FEATURES;
+
+	if (dev->data->dev_conf.intr_conf.rxq) {
+		ret = virtio_init_device(dev, hw->req_guest_features);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (rxmode->max_rx_pkt_len > hw->max_mtu + ether_hdr_len)
+		req_features &= ~(1ULL << VIRTIO_NET_F_MTU);
+
+	if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
+			   DEV_RX_OFFLOAD_TCP_CKSUM))
+		req_features |= (1ULL << VIRTIO_NET_F_GUEST_CSUM);
+
+	if (rx_offloads & DEV_RX_OFFLOAD_TCP_LRO)
+		req_features |=
+			(1ULL << VIRTIO_NET_F_GUEST_TSO4) |
+			(1ULL << VIRTIO_NET_F_GUEST_TSO6);
+
+	if (tx_offloads & (DEV_TX_OFFLOAD_UDP_CKSUM |
+			   DEV_TX_OFFLOAD_TCP_CKSUM))
+		req_features |= (1ULL << VIRTIO_NET_F_CSUM);
+
+	if (tx_offloads & DEV_TX_OFFLOAD_TCP_TSO)
+		req_features |=
+			(1ULL << VIRTIO_NET_F_HOST_TSO4) |
+			(1ULL << VIRTIO_NET_F_HOST_TSO6);
+
+	/* if request features changed, reinit the device */
+	if (req_features != hw->req_guest_features) {
+		ret = virtio_init_device(dev, req_features);
+		if (ret < 0)
+			return ret;
+	}
+
+	if ((rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
+			    DEV_RX_OFFLOAD_TCP_CKSUM)) &&
+		!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_CSUM)) {
+		PMD_DRV_LOG(ERR,
+			"rx checksum not available on this host");
+		return -ENOTSUP;
+	}
+
+	if ((rx_offloads & DEV_RX_OFFLOAD_TCP_LRO) &&
+		(!vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO4) ||
+		 !vtpci_with_feature(hw, VIRTIO_NET_F_GUEST_TSO6))) {
+		PMD_DRV_LOG(ERR,
+			"Large Receive Offload not available on this host");
+		return -ENOTSUP;
+	}
+
+	/* start control queue */
+	if (vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VQ))
+		virtio_dev_cq_start(dev);
+
+	if (rx_offloads & DEV_RX_OFFLOAD_VLAN_STRIP)
+		hw->vlan_strip = 1;
+
+	if ((rx_offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
+	    && !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
+		PMD_DRV_LOG(ERR,
+			    "vlan filtering not available on this host");
+		return -ENOTSUP;
+	}
+
+	hw->has_tx_offload = tx_offload_enabled(hw);
+	hw->has_rx_offload = rx_offload_enabled(hw);
+
+	if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
+		/* Enable vector (0) for Link State Intrerrupt */
+		if (VTPCI_OPS(hw)->set_config_irq(hw, 0) ==
+				VIRTIO_MSI_NO_VECTOR) {
+			PMD_DRV_LOG(ERR, "failed to set config vector");
+			return -EBUSY;
+		}
+
+	rte_spinlock_init(&hw->state_lock);
+
+	hw->use_simple_rx = 1;
+
+	if (vtpci_with_feature(hw, VIRTIO_F_IN_ORDER)) {
+		hw->use_inorder_tx = 1;
+		hw->use_inorder_rx = 1;
+		hw->use_simple_rx = 0;
+	}
+
+	if (vtpci_packed_queue(hw)) {
+		hw->use_simple_rx = 0;
+		hw->use_inorder_rx = 0;
+	}
+
+#if defined RTE_ARCH_ARM64 || defined RTE_ARCH_ARM
+	if (!rte_cpu_get_flag_enabled(RTE_CPUFLAG_NEON)) {
+		hw->use_simple_rx = 0;
+	}
+#endif
+	if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
+		 hw->use_simple_rx = 0;
+	}
+
+	if (rx_offloads & (DEV_RX_OFFLOAD_UDP_CKSUM |
+			   DEV_RX_OFFLOAD_TCP_CKSUM |
+			   DEV_RX_OFFLOAD_TCP_LRO |
+			   DEV_RX_OFFLOAD_VLAN_STRIP))
+		hw->use_simple_rx = 0;
+
+	hw->opened = true;
+
+	return 0;
+}
+
+
+static int
+virtio_dev_start(struct rte_eth_dev *dev)
+{
+	uint16_t nb_queues, i;
+	struct virtnet_rx *rxvq;
+	struct virtnet_tx *txvq __rte_unused;
+	struct virtio_hw *hw = dev->data->dev_private;
+	int ret;
+
+	/* Finish the initialization of the queues */
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		ret = virtio_dev_rx_queue_setup_finish(dev, i);
+		if (ret < 0)
+			return ret;
+	}
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		ret = virtio_dev_tx_queue_setup_finish(dev, i);
+		if (ret < 0)
+			return ret;
+	}
+
+	/* check if lsc interrupt feature is enabled */
+	if (dev->data->dev_conf.intr_conf.lsc) {
+		if (!(dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)) {
+			PMD_DRV_LOG(ERR, "link status not supported by host");
+			return -ENOTSUP;
+		}
+	}
+
+	/* Enable uio/vfio intr/eventfd mapping: althrough we already did that
+	 * in device configure, but it could be unmapped  when device is
+	 * stopped.
+	 */
+	if (dev->data->dev_conf.intr_conf.lsc ||
+	    dev->data->dev_conf.intr_conf.rxq) {
+		virtio_intr_disable(dev);
+
+		/* Setup interrupt callback  */
+		if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
+			rte_intr_callback_register(dev->intr_handle,
+						   virtio_interrupt_handler,
+						   dev);
+
+		if (virtio_intr_enable(dev) < 0) {
+			PMD_DRV_LOG(ERR, "interrupt enable failed");
+			return -EIO;
+		}
+	}
+
+	/*Notify the backend
+	 *Otherwise the tap backend might already stop its queue due to fullness.
+	 *vhost backend will have no chance to be waked up
+	 */
+	nb_queues = RTE_MAX(dev->data->nb_rx_queues, dev->data->nb_tx_queues);
+	if (hw->max_queue_pairs > 1) {
+		if (virtio_set_multiple_queues(dev, nb_queues) != 0)
+			return -EINVAL;
+	}
+
+	PMD_INIT_LOG(DEBUG, "nb_queues=%d", nb_queues);
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		rxvq = dev->data->rx_queues[i];
+		/* Flush the old packets */
+		virtqueue_rxvq_flush(rxvq->vq);
+		virtqueue_notify(rxvq->vq);
+	}
+
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		txvq = dev->data->tx_queues[i];
+		virtqueue_notify(txvq->vq);
+	}
+
+	PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		rxvq = dev->data->rx_queues[i];
+		VIRTQUEUE_DUMP(rxvq->vq);
+	}
+
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		txvq = dev->data->tx_queues[i];
+		VIRTQUEUE_DUMP(txvq->vq);
+	}
+
+	set_rxtx_funcs(dev);
+	hw->started = true;
+
+	/* Initialize Link state */
+	virtio_dev_link_update(dev, 0);
+
+	return 0;
+}
+
+static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	uint16_t nr_vq = virtio_get_nr_vq(hw);
+	const char *type __rte_unused;
+	unsigned int i, mbuf_num = 0;
+	struct virtqueue *vq;
+	struct rte_mbuf *buf;
+	int queue_type;
+
+	if (hw->vqs == NULL)
+		return;
+
+	for (i = 0; i < nr_vq; i++) {
+		vq = hw->vqs[i];
+		if (!vq)
+			continue;
+
+		queue_type = virtio_get_queue_type(hw, i);
+		if (queue_type == VTNET_RQ)
+			type = "rxq";
+		else if (queue_type == VTNET_TQ)
+			type = "txq";
+		else
+			continue;
+
+		PMD_INIT_LOG(DEBUG,
+			"Before freeing %s[%d] used and unused buf",
+			type, i);
+		VIRTQUEUE_DUMP(vq);
+
+		while ((buf = virtqueue_detach_unused(vq)) != NULL) {
+			rte_pktmbuf_free(buf);
+			mbuf_num++;
+		}
+
+		PMD_INIT_LOG(DEBUG,
+			"After freeing %s[%d] used and unused buf",
+			type, i);
+		VIRTQUEUE_DUMP(vq);
+	}
+
+	PMD_INIT_LOG(DEBUG, "%d mbufs freed", mbuf_num);
+}
+
+/*
+ * Stop device: disable interrupt and mark link down
+ */
+static void
+virtio_dev_stop(struct rte_eth_dev *dev)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct rte_eth_link link;
+	struct rte_intr_conf *intr_conf = &dev->data->dev_conf.intr_conf;
+
+	PMD_INIT_LOG(DEBUG, "stop");
+
+	rte_spinlock_lock(&hw->state_lock);
+	if (!hw->started)
+		goto out_unlock;
+	hw->started = false;
+
+	if (intr_conf->lsc || intr_conf->rxq) {
+		virtio_intr_disable(dev);
+
+		/* Reset interrupt callback  */
+		if (dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
+			rte_intr_callback_unregister(dev->intr_handle,
+						     virtio_interrupt_handler,
+						     dev);
+		}
+	}
+
+	memset(&link, 0, sizeof(link));
+	rte_eth_linkstatus_set(dev, &link);
+out_unlock:
+	rte_spinlock_unlock(&hw->state_lock);
+}
+
+static int
+virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
+{
+	struct rte_eth_link link;
+	uint16_t status;
+	struct virtio_hw *hw = dev->data->dev_private;
+
+	memset(&link, 0, sizeof(link));
+	link.link_duplex = ETH_LINK_FULL_DUPLEX;
+	link.link_speed  = ETH_SPEED_NUM_10G;
+	link.link_autoneg = ETH_LINK_FIXED;
+
+	if (!hw->started) {
+		link.link_status = ETH_LINK_DOWN;
+	} else if (vtpci_with_feature(hw, VIRTIO_NET_F_STATUS)) {
+		PMD_INIT_LOG(DEBUG, "Get link status from hw");
+		vtpci_read_dev_config(hw,
+				offsetof(struct virtio_net_config, status),
+				&status, sizeof(status));
+		if ((status & VIRTIO_NET_S_LINK_UP) == 0) {
+			link.link_status = ETH_LINK_DOWN;
+			PMD_INIT_LOG(DEBUG, "Port %d is down",
+				     dev->data->port_id);
+		} else {
+			link.link_status = ETH_LINK_UP;
+			PMD_INIT_LOG(DEBUG, "Port %d is up",
+				     dev->data->port_id);
+		}
+	} else {
+		link.link_status = ETH_LINK_UP;
+	}
+
+	return rte_eth_linkstatus_set(dev, &link);
+}
+
+static int
+virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
+{
+	const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
+	struct virtio_hw *hw = dev->data->dev_private;
+	uint64_t offloads = rxmode->offloads;
+
+	if (mask & ETH_VLAN_FILTER_MASK) {
+		if ((offloads & DEV_RX_OFFLOAD_VLAN_FILTER) &&
+				!vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
+
+			PMD_DRV_LOG(NOTICE,
+				"vlan filtering not available on this host");
+
+			return -ENOTSUP;
+		}
+	}
+
+	if (mask & ETH_VLAN_STRIP_MASK)
+		hw->vlan_strip = !!(offloads & DEV_RX_OFFLOAD_VLAN_STRIP);
+
+	return 0;
+}
+
+static void
+virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
+{
+	uint64_t tso_mask, host_features;
+	struct virtio_hw *hw = dev->data->dev_private;
+
+	dev_info->speed_capa = ETH_LINK_SPEED_10G; /* fake value */
+
+	dev_info->max_rx_queues =
+		RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_RX_QUEUES);
+	dev_info->max_tx_queues =
+		RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
+	dev_info->min_rx_bufsize = VIRTIO_MIN_RX_BUFSIZE;
+	dev_info->max_rx_pktlen = VIRTIO_MAX_RX_PKTLEN;
+	dev_info->max_mac_addrs = VIRTIO_MAX_MAC_ADDRS;
+
+	host_features = VTPCI_OPS(hw)->get_features(hw);
+	dev_info->rx_offload_capa = DEV_RX_OFFLOAD_VLAN_STRIP;
+	dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_JUMBO_FRAME;
+	if (host_features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
+		dev_info->rx_offload_capa |=
+			DEV_RX_OFFLOAD_TCP_CKSUM |
+			DEV_RX_OFFLOAD_UDP_CKSUM;
+	}
+	if (host_features & (1ULL << VIRTIO_NET_F_CTRL_VLAN))
+		dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_VLAN_FILTER;
+	tso_mask = (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
+		(1ULL << VIRTIO_NET_F_GUEST_TSO6);
+	if ((host_features & tso_mask) == tso_mask)
+		dev_info->rx_offload_capa |= DEV_RX_OFFLOAD_TCP_LRO;
+
+	dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
+				    DEV_TX_OFFLOAD_VLAN_INSERT;
+	if (host_features & (1ULL << VIRTIO_NET_F_CSUM)) {
+		dev_info->tx_offload_capa |=
+			DEV_TX_OFFLOAD_UDP_CKSUM |
+			DEV_TX_OFFLOAD_TCP_CKSUM;
+	}
+	tso_mask = (1ULL << VIRTIO_NET_F_HOST_TSO4) |
+		(1ULL << VIRTIO_NET_F_HOST_TSO6);
+	if ((host_features & tso_mask) == tso_mask)
+		dev_info->tx_offload_capa |= DEV_TX_OFFLOAD_TCP_TSO;
+}
+
+/*
+ * It enables testpmd to collect per queue stats.
+ */
+static int
+virtio_dev_queue_stats_mapping_set(__rte_unused struct rte_eth_dev *eth_dev,
+__rte_unused uint16_t queue_id, __rte_unused uint8_t stat_idx,
+__rte_unused uint8_t is_rx)
+{
+	return 0;
+}
+
+RTE_PMD_EXPORT_NAME(net_virtio, __COUNTER__);
+RTE_PMD_REGISTER_PCI_TABLE(net_virtio, pci_id_virtio_map);
+RTE_PMD_REGISTER_KMOD_DEP(net_virtio, "* igb_uio | uio_pci_generic | vfio-pci");
+
+RTE_INIT(virtio_init_log)
+{
+	virtio_logtype_init = rte_log_register("pmd.net.virtio.init");
+	if (virtio_logtype_init >= 0)
+		rte_log_set_level(virtio_logtype_init, RTE_LOG_NOTICE);
+	virtio_logtype_driver = rte_log_register("pmd.net.virtio.driver");
+	if (virtio_logtype_driver >= 0)
+		rte_log_set_level(virtio_logtype_driver, RTE_LOG_NOTICE);
+}