Imported upstream release 16.04

* gbp import-orig ../dpdk-16.04.tar.xz

Change-Id: Iac2196db782ba322f6974d8a752acc34ce5024c3
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

1 files changed, 1461 insertions, 0 deletions

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
new file mode 100644
index 00000000..63a368ac
--- /dev/null
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -0,0 +1,1461 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdint.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <rte_ethdev.h>
+#include <rte_memcpy.h>
+#include <rte_string_fns.h>
+#include <rte_memzone.h>
+#include <rte_malloc.h>
+#include <rte_atomic.h>
+#include <rte_branch_prediction.h>
+#include <rte_pci.h>
+#include <rte_ether.h>
+#include <rte_common.h>
+#include <rte_errno.h>
+
+#include <rte_memory.h>
+#include <rte_eal.h>
+#include <rte_dev.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_init(struct rte_eth_dev *eth_dev);
+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,
+	__rte_unused int wait_to_complete);
+
+static void virtio_set_hwaddr(struct virtio_hw *hw);
+static void virtio_get_hwaddr(struct virtio_hw *hw);
+
+static void 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_xstats *xstats, unsigned n);
+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 void virtio_mac_addr_add(struct rte_eth_dev *dev,
+				struct ether_addr *mac_addr,
+				uint32_t index, uint32_t vmdq __rte_unused);
+static void virtio_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index);
+static void virtio_mac_addr_set(struct rte_eth_dev *dev,
+				struct ether_addr *mac_addr);
+
+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);
+
+/*
+ * The set of PCI devices this driver supports
+ */
+static const struct rte_pci_id pci_id_virtio_map[] = {
+
+#define RTE_PCI_DEV_ID_DECL_VIRTIO(vend, dev) {RTE_PCI_DEVICE(vend, dev)},
+#include "rte_pci_dev_ids.h"
+
+{ .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_q_stat_strings[] = {
+	{"good_packets",           offsetof(struct virtqueue, packets)},
+	{"good_bytes",             offsetof(struct virtqueue, bytes)},
+	{"errors",                 offsetof(struct virtqueue, errors)},
+	{"multicast_packets",      offsetof(struct virtqueue, multicast)},
+	{"broadcast_packets",      offsetof(struct virtqueue, broadcast)},
+	{"undersize_packets",      offsetof(struct virtqueue, size_bins[0])},
+	{"size_64_packets",        offsetof(struct virtqueue, size_bins[1])},
+	{"size_65_127_packets",    offsetof(struct virtqueue, size_bins[2])},
+	{"size_128_255_packets",   offsetof(struct virtqueue, size_bins[3])},
+	{"size_256_511_packets",   offsetof(struct virtqueue, size_bins[4])},
+	{"size_512_1023_packets",  offsetof(struct virtqueue, size_bins[5])},
+	{"size_1024_1517_packets", offsetof(struct virtqueue, size_bins[6])},
+	{"size_1518_max_packets",  offsetof(struct virtqueue, size_bins[7])},
+};
+
+#define VIRTIO_NB_Q_XSTATS (sizeof(rte_virtio_q_stat_strings) / \
+			    sizeof(rte_virtio_q_stat_strings[0]))
+
+static int
+virtio_send_command(struct virtqueue *vq, struct virtio_pmd_ctrl *ctrl,
+		int *dlen, int pkt_num)
+{
+	uint32_t head, i;
+	int k, sum = 0;
+	virtio_net_ctrl_ack status = ~0;
+	struct virtio_pmd_ctrl result;
+
+	ctrl->status = status;
+
+	if (!(vq && vq->hw->cvq)) {
+		PMD_INIT_LOG(ERR, "Control queue is not supported.");
+		return -1;
+	}
+	head = vq->vq_desc_head_idx;
+
+	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 < ((uint32_t)pkt_num + 2)) || (pkt_num < 1))
+		return -1;
+
+	memcpy(vq->virtio_net_hdr_mz->addr, ctrl,
+		sizeof(struct virtio_pmd_ctrl));
+
+	/*
+	 * 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_ring.desc[head].flags = VRING_DESC_F_NEXT;
+	vq->vq_ring.desc[head].addr = vq->virtio_net_hdr_mz->phys_addr;
+	vq->vq_ring.desc[head].len = sizeof(struct virtio_net_ctrl_hdr);
+	vq->vq_free_cnt--;
+	i = vq->vq_ring.desc[head].next;
+
+	for (k = 0; k < pkt_num; k++) {
+		vq->vq_ring.desc[i].flags = VRING_DESC_F_NEXT;
+		vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
+			+ sizeof(struct virtio_net_ctrl_hdr)
+			+ sizeof(ctrl->status) + sizeof(uint8_t)*sum;
+		vq->vq_ring.desc[i].len = dlen[k];
+		sum += dlen[k];
+		vq->vq_free_cnt--;
+		i = vq->vq_ring.desc[i].next;
+	}
+
+	vq->vq_ring.desc[i].flags = VRING_DESC_F_WRITE;
+	vq->vq_ring.desc[i].addr = vq->virtio_net_hdr_mz->phys_addr
+			+ sizeof(struct virtio_net_ctrl_hdr);
+	vq->vq_ring.desc[i].len = sizeof(ctrl->status);
+	vq->vq_free_cnt--;
+
+	vq->vq_desc_head_idx = vq->vq_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 (vq->vq_used_cons_idx == vq->vq_ring.used->idx) {
+		rte_rmb();
+		usleep(100);
+	}
+
+	while (vq->vq_used_cons_idx != vq->vq_ring.used->idx) {
+		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_ring.used->ring[used_idx];
+		idx = (uint32_t) uep->id;
+		desc_idx = idx;
+
+		while (vq->vq_ring.desc[desc_idx].flags & VRING_DESC_F_NEXT) {
+			desc_idx = vq->vq_ring.desc[desc_idx].next;
+			vq->vq_free_cnt++;
+		}
+
+		vq->vq_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);
+
+	memcpy(&result, vq->virtio_net_hdr_mz->addr,
+			sizeof(struct virtio_pmd_ctrl));
+
+	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;
+}
+
+void
+virtio_dev_queue_release(struct virtqueue *vq) {
+	struct virtio_hw *hw;
+
+	if (vq) {
+		hw = vq->hw;
+		hw->vtpci_ops->del_queue(hw, vq);
+
+		rte_free(vq->sw_ring);
+		rte_free(vq);
+	}
+}
+
+int virtio_dev_queue_setup(struct rte_eth_dev *dev,
+			int queue_type,
+			uint16_t queue_idx,
+			uint16_t vtpci_queue_idx,
+			uint16_t nb_desc,
+			unsigned int socket_id,
+			struct virtqueue **pvq)
+{
+	char vq_name[VIRTQUEUE_MAX_NAME_SZ];
+	const struct rte_memzone *mz;
+	unsigned int vq_size, size;
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct virtqueue *vq = NULL;
+
+	PMD_INIT_LOG(DEBUG, "setting up queue: %u", vtpci_queue_idx);
+
+	/*
+	 * Read the virtqueue size from the Queue Size field
+	 * Always power of 2 and if 0 virtqueue does not exist
+	 */
+	vq_size = hw->vtpci_ops->get_queue_num(hw, vtpci_queue_idx);
+	PMD_INIT_LOG(DEBUG, "vq_size: %u nb_desc:%u", vq_size, nb_desc);
+	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;
+	}
+
+	if (queue_type == VTNET_RQ) {
+		snprintf(vq_name, sizeof(vq_name), "port%d_rvq%d",
+			dev->data->port_id, queue_idx);
+		vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
+			vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
+		vq->sw_ring = rte_zmalloc_socket("rxq->sw_ring",
+			(RTE_PMD_VIRTIO_RX_MAX_BURST + vq_size) *
+			sizeof(vq->sw_ring[0]), RTE_CACHE_LINE_SIZE, socket_id);
+	} else if (queue_type == VTNET_TQ) {
+		snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d",
+			dev->data->port_id, queue_idx);
+		vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
+			vq_size * sizeof(struct vq_desc_extra), RTE_CACHE_LINE_SIZE);
+	} else if (queue_type == VTNET_CQ) {
+		snprintf(vq_name, sizeof(vq_name), "port%d_cvq",
+			dev->data->port_id);
+		vq = rte_zmalloc(vq_name, sizeof(struct virtqueue) +
+			vq_size * sizeof(struct vq_desc_extra),
+			RTE_CACHE_LINE_SIZE);
+	}
+	if (vq == NULL) {
+		PMD_INIT_LOG(ERR, "Can not allocate virtqueue");
+		return -ENOMEM;
+	}
+	if (queue_type == VTNET_RQ && vq->sw_ring == NULL) {
+		PMD_INIT_LOG(ERR, "Can not allocate RX soft ring");
+		rte_free(vq);
+		return -ENOMEM;
+	}
+
+	vq->hw = hw;
+	vq->port_id = dev->data->port_id;
+	vq->queue_id = queue_idx;
+	vq->vq_queue_index = vtpci_queue_idx;
+	vq->vq_nentries = vq_size;
+
+	if (nb_desc == 0 || nb_desc > vq_size)
+		nb_desc = vq_size;
+	vq->vq_free_cnt = nb_desc;
+
+	/*
+	 * Reserve a memzone for vring elements
+	 */
+	size = vring_size(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,
+		socket_id, 0, VIRTIO_PCI_VRING_ALIGN);
+	if (mz == NULL) {
+		if (rte_errno == EEXIST)
+			mz = rte_memzone_lookup(vq_name);
+		if (mz == NULL) {
+			rte_free(vq);
+			return -ENOMEM;
+		}
+	}
+
+	/*
+	 * Virtio PCI device VIRTIO_PCI_QUEUE_PF register is 32bit,
+	 * and only accepts 32 bit page frame number.
+	 * Check if the allocated physical memory exceeds 16TB.
+	 */
+	if ((mz->phys_addr + vq->vq_ring_size - 1) >> (VIRTIO_PCI_QUEUE_ADDR_SHIFT + 32)) {
+		PMD_INIT_LOG(ERR, "vring address shouldn't be above 16TB!");
+		rte_free(vq);
+		return -ENOMEM;
+	}
+
+	memset(mz->addr, 0, sizeof(mz->len));
+	vq->mz = mz;
+	vq->vq_ring_mem = mz->phys_addr;
+	vq->vq_ring_virt_mem = mz->addr;
+	PMD_INIT_LOG(DEBUG, "vq->vq_ring_mem:      0x%"PRIx64, (uint64_t)mz->phys_addr);
+	PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%"PRIx64, (uint64_t)(uintptr_t)mz->addr);
+	vq->virtio_net_hdr_mz  = NULL;
+	vq->virtio_net_hdr_mem = 0;
+
+	if (queue_type == VTNET_TQ) {
+		const struct rte_memzone *hdr_mz;
+		struct virtio_tx_region *txr;
+		unsigned int i;
+
+		/*
+		 * For each xmit packet, allocate a virtio_net_hdr
+		 * and indirect ring elements
+		 */
+		snprintf(vq_name, sizeof(vq_name), "port%d_tvq%d_hdrzone",
+			 dev->data->port_id, queue_idx);
+		hdr_mz = rte_memzone_reserve_aligned(vq_name,
+						     vq_size * sizeof(*txr),
+						     socket_id, 0,
+						     RTE_CACHE_LINE_SIZE);
+		if (hdr_mz == NULL) {
+			if (rte_errno == EEXIST)
+				hdr_mz = rte_memzone_lookup(vq_name);
+			if (hdr_mz == NULL) {
+				rte_free(vq);
+				return -ENOMEM;
+			}
+		}
+		vq->virtio_net_hdr_mz = hdr_mz;
+		vq->virtio_net_hdr_mem = hdr_mz->phys_addr;
+
+		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;
+
+			vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir));
+
+			/* first indirect descriptor is always the tx header */
+			start_dp->addr = vq->virtio_net_hdr_mem
+				+ i * sizeof(*txr)
+				+ offsetof(struct virtio_tx_region, tx_hdr);
+
+			start_dp->len = vq->hw->vtnet_hdr_size;
+			start_dp->flags = VRING_DESC_F_NEXT;
+		}
+
+	} else if (queue_type == VTNET_CQ) {
+		/* Allocate a page for control vq command, data and status */
+		snprintf(vq_name, sizeof(vq_name), "port%d_cvq_hdrzone",
+			dev->data->port_id);
+		vq->virtio_net_hdr_mz = rte_memzone_reserve_aligned(vq_name,
+			PAGE_SIZE, socket_id, 0, RTE_CACHE_LINE_SIZE);
+		if (vq->virtio_net_hdr_mz == NULL) {
+			if (rte_errno == EEXIST)
+				vq->virtio_net_hdr_mz =
+					rte_memzone_lookup(vq_name);
+			if (vq->virtio_net_hdr_mz == NULL) {
+				rte_free(vq);
+				return -ENOMEM;
+			}
+		}
+		vq->virtio_net_hdr_mem =
+			vq->virtio_net_hdr_mz->phys_addr;
+		memset(vq->virtio_net_hdr_mz->addr, 0, PAGE_SIZE);
+	}
+
+	hw->vtpci_ops->setup_queue(hw, vq);
+
+	*pvq = vq;
+	return 0;
+}
+
+static int
+virtio_dev_cq_queue_setup(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx,
+		uint32_t socket_id)
+{
+	struct virtqueue *vq;
+	int ret;
+	struct virtio_hw *hw = dev->data->dev_private;
+
+	PMD_INIT_FUNC_TRACE();
+	ret = virtio_dev_queue_setup(dev, VTNET_CQ, VTNET_SQ_CQ_QUEUE_IDX,
+			vtpci_queue_idx, 0, socket_id, &vq);
+	if (ret < 0) {
+		PMD_INIT_LOG(ERR, "control vq initialization failed");
+		return ret;
+	}
+
+	hw->cvq = vq;
+	return 0;
+}
+
+static void
+virtio_free_queues(struct rte_eth_dev *dev)
+{
+	unsigned int i;
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++)
+		virtio_dev_rx_queue_release(dev->data->rx_queues[i]);
+
+	dev->data->nb_rx_queues = 0;
+
+	for (i = 0; i < dev->data->nb_tx_queues; i++)
+		virtio_dev_tx_queue_release(dev->data->tx_queues[i]);
+
+	dev->data->nb_tx_queues = 0;
+}
+
+static void
+virtio_dev_close(struct rte_eth_dev *dev)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct rte_pci_device *pci_dev = dev->pci_dev;
+
+	PMD_INIT_LOG(DEBUG, "virtio_dev_close");
+
+	if (hw->started == 1)
+		virtio_dev_stop(dev);
+
+	/* reset the NIC */
+	if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
+		vtpci_irq_config(hw, VIRTIO_MSI_NO_VECTOR);
+	vtpci_reset(hw);
+	virtio_dev_free_mbufs(dev);
+	virtio_free_queues(dev);
+}
+
+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\n");
+		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\n");
+		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\n");
+		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\n");
+		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");
+}
+
+/*
+ * 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,
+
+	.dev_infos_get           = virtio_dev_info_get,
+	.stats_get               = virtio_dev_stats_get,
+	.xstats_get              = virtio_dev_xstats_get,
+	.stats_reset             = virtio_dev_stats_reset,
+	.xstats_reset            = virtio_dev_stats_reset,
+	.link_update             = virtio_dev_link_update,
+	.rx_queue_setup          = virtio_dev_rx_queue_setup,
+	.rx_queue_release        = virtio_dev_rx_queue_release,
+	.tx_queue_setup          = virtio_dev_tx_queue_setup,
+	.tx_queue_release        = virtio_dev_tx_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,
+};
+
+static inline int
+virtio_dev_atomic_read_link_status(struct rte_eth_dev *dev,
+				struct rte_eth_link *link)
+{
+	struct rte_eth_link *dst = link;
+	struct rte_eth_link *src = &(dev->data->dev_link);
+
+	if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
+			*(uint64_t *)src) == 0)
+		return -1;
+
+	return 0;
+}
+
+/**
+ * Atomically writes the link status information into global
+ * structure rte_eth_dev.
+ *
+ * @param dev
+ *   - Pointer to the structure rte_eth_dev to read from.
+ *   - Pointer to the buffer to be saved with the link status.
+ *
+ * @return
+ *   - On success, zero.
+ *   - On failure, negative value.
+ */
+static inline int
+virtio_dev_atomic_write_link_status(struct rte_eth_dev *dev,
+		struct rte_eth_link *link)
+{
+	struct rte_eth_link *dst = &(dev->data->dev_link);
+	struct rte_eth_link *src = link;
+
+	if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
+					*(uint64_t *)src) == 0)
+		return -1;
+
+	return 0;
+}
+
+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 virtqueue *txvq = dev->data->tx_queues[i];
+		if (txvq == NULL)
+			continue;
+
+		stats->opackets += txvq->packets;
+		stats->obytes += txvq->bytes;
+		stats->oerrors += txvq->errors;
+
+		if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+			stats->q_opackets[i] = txvq->packets;
+			stats->q_obytes[i] = txvq->bytes;
+		}
+	}
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		const struct virtqueue *rxvq = dev->data->rx_queues[i];
+		if (rxvq == NULL)
+			continue;
+
+		stats->ipackets += rxvq->packets;
+		stats->ibytes += rxvq->bytes;
+		stats->ierrors += rxvq->errors;
+
+		if (i < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+			stats->q_ipackets[i] = rxvq->packets;
+			stats->q_ibytes[i] = rxvq->bytes;
+		}
+	}
+
+	stats->rx_nombuf = dev->data->rx_mbuf_alloc_failed;
+}
+
+static int
+virtio_dev_xstats_get(struct rte_eth_dev *dev, struct rte_eth_xstats *xstats,
+		      unsigned n)
+{
+	unsigned i;
+	unsigned count = 0;
+
+	unsigned nstats = dev->data->nb_tx_queues * VIRTIO_NB_Q_XSTATS +
+		dev->data->nb_rx_queues * VIRTIO_NB_Q_XSTATS;
+
+	if (n < nstats)
+		return nstats;
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		struct virtqueue *rxvq = dev->data->rx_queues[i];
+
+		if (rxvq == NULL)
+			continue;
+
+		unsigned t;
+
+		for (t = 0; t < VIRTIO_NB_Q_XSTATS; t++) {
+			snprintf(xstats[count].name, sizeof(xstats[count].name),
+				 "rx_q%u_%s", i,
+				 rte_virtio_q_stat_strings[t].name);
+			xstats[count].value = *(uint64_t *)(((char *)rxvq) +
+				rte_virtio_q_stat_strings[t].offset);
+			count++;
+		}
+	}
+
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		struct virtqueue *txvq = dev->data->tx_queues[i];
+
+		if (txvq == NULL)
+			continue;
+
+		unsigned t;
+
+		for (t = 0; t < VIRTIO_NB_Q_XSTATS; t++) {
+			snprintf(xstats[count].name, sizeof(xstats[count].name),
+				 "tx_q%u_%s", i,
+				 rte_virtio_q_stat_strings[t].name);
+			xstats[count].value = *(uint64_t *)(((char *)txvq) +
+				rte_virtio_q_stat_strings[t].offset);
+			count++;
+		}
+	}
+
+	return count;
+}
+
+static void
+virtio_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
+{
+	virtio_update_stats(dev, stats);
+}
+
+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 virtqueue *txvq = dev->data->tx_queues[i];
+		if (txvq == NULL)
+			continue;
+
+		txvq->packets = 0;
+		txvq->bytes = 0;
+		txvq->errors = 0;
+		txvq->multicast = 0;
+		txvq->broadcast = 0;
+		memset(txvq->size_bins, 0, sizeof(txvq->size_bins[0]) * 8);
+	}
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		struct virtqueue *rxvq = dev->data->rx_queues[i];
+		if (rxvq == NULL)
+			continue;
+
+		rxvq->packets = 0;
+		rxvq->bytes = 0;
+		rxvq->errors = 0;
+		rxvq->multicast = 0;
+		rxvq->broadcast = 0;
+		memset(rxvq->size_bins, 0, sizeof(rxvq->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 void
+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\n");
+		return;
+	}
+
+	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);
+}
+
+static void
+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;
+	}
+
+	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);
+	}
+
+	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 void
+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);
+		virtio_send_command(hw->cvq, &ctrl, &len, 1);
+	} else if (vtpci_with_feature(hw, VIRTIO_NET_F_MAC))
+		virtio_set_hwaddr(hw);
+}
+
+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_negotiate_features(struct virtio_hw *hw)
+{
+	uint64_t host_features;
+
+	/* Prepare guest_features: feature that driver wants to support */
+	hw->guest_features = VIRTIO_PMD_GUEST_FEATURES;
+	PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %" PRIx64,
+		hw->guest_features);
+
+	/* Read device(host) feature bits */
+	host_features = hw->vtpci_ops->get_features(hw);
+	PMD_INIT_LOG(DEBUG, "host_features before negotiate = %" PRIx64,
+		host_features);
+
+	/*
+	 * Negotiate features: Subset of device feature bits are written back
+	 * guest feature bits.
+	 */
+	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;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * Process Virtio Config changed interrupt and call the callback
+ * if link state changed.
+ */
+static void
+virtio_interrupt_handler(__rte_unused struct rte_intr_handle *handle,
+			 void *param)
+{
+	struct rte_eth_dev *dev = param;
+	struct virtio_hw *hw = dev->data->dev_private;
+	uint8_t isr;
+
+	/* Read interrupt status which clears interrupt */
+	isr = vtpci_isr(hw);
+	PMD_DRV_LOG(INFO, "interrupt status = %#x", isr);
+
+	if (rte_intr_enable(&dev->pci_dev->intr_handle) < 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);
+	}
+
+}
+
+static void
+rx_func_get(struct rte_eth_dev *eth_dev)
+{
+	struct virtio_hw *hw = eth_dev->data->dev_private;
+	if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF))
+		eth_dev->rx_pkt_burst = &virtio_recv_mergeable_pkts;
+	else
+		eth_dev->rx_pkt_burst = &virtio_recv_pkts;
+}
+
+/*
+ * This function is based on probe() function in virtio_pci.c
+ * It returns 0 on success.
+ */
+static int
+eth_virtio_dev_init(struct rte_eth_dev *eth_dev)
+{
+	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;
+	int ret;
+
+	RTE_BUILD_BUG_ON(RTE_PKTMBUF_HEADROOM < sizeof(struct virtio_net_hdr));
+
+	eth_dev->dev_ops = &virtio_eth_dev_ops;
+	eth_dev->tx_pkt_burst = &virtio_xmit_pkts;
+
+	if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
+		rx_func_get(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;
+	}
+
+	pci_dev = eth_dev->pci_dev;
+
+	ret = vtpci_init(pci_dev, hw);
+	if (ret)
+		return ret;
+
+	/* Reset the device although not necessary at startup */
+	vtpci_reset(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) < 0)
+		return -1;
+
+	/* If host does not support status then disable LSC */
+	if (!vtpci_with_feature(hw, VIRTIO_NET_F_STATUS))
+		pci_dev->driver->drv_flags &= ~RTE_PCI_DRV_INTR_LSC;
+
+	rte_eth_copy_pci_info(eth_dev, pci_dev);
+
+	rx_func_get(eth_dev);
+
+	/* 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))
+		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_rx_queues =
+			(VIRTIO_MAX_RX_QUEUES < config->max_virtqueue_pairs) ?
+			VIRTIO_MAX_RX_QUEUES : config->max_virtqueue_pairs;
+		hw->max_tx_queues =
+			(VIRTIO_MAX_TX_QUEUES < config->max_virtqueue_pairs) ?
+			VIRTIO_MAX_TX_QUEUES : config->max_virtqueue_pairs;
+
+		virtio_dev_cq_queue_setup(eth_dev,
+					config->max_virtqueue_pairs * 2,
+					SOCKET_ID_ANY);
+
+		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 {
+		hw->max_rx_queues = 1;
+		hw->max_tx_queues = 1;
+	}
+
+	PMD_INIT_LOG(DEBUG, "hw->max_rx_queues=%d   hw->max_tx_queues=%d",
+			hw->max_rx_queues, hw->max_tx_queues);
+	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);
+
+	/* Setup interrupt callback  */
+	if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
+		rte_intr_callback_register(&pci_dev->intr_handle,
+				   virtio_interrupt_handler, eth_dev);
+
+	virtio_dev_cq_start(eth_dev);
+
+	return 0;
+}
+
+static int
+eth_virtio_dev_uninit(struct rte_eth_dev *eth_dev)
+{
+	struct rte_pci_device *pci_dev;
+	struct virtio_hw *hw = eth_dev->data->dev_private;
+
+	PMD_INIT_FUNC_TRACE();
+
+	if (rte_eal_process_type() == RTE_PROC_SECONDARY)
+		return -EPERM;
+
+	/* Close it anyway since there's no way to know if closed */
+	virtio_dev_close(eth_dev);
+
+	pci_dev = eth_dev->pci_dev;
+
+	eth_dev->dev_ops = NULL;
+	eth_dev->tx_pkt_burst = NULL;
+	eth_dev->rx_pkt_burst = NULL;
+
+	virtio_dev_queue_release(hw->cvq);
+
+	rte_free(eth_dev->data->mac_addrs);
+	eth_dev->data->mac_addrs = NULL;
+
+	/* reset interrupt callback  */
+	if (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
+		rte_intr_callback_unregister(&pci_dev->intr_handle,
+						virtio_interrupt_handler,
+						eth_dev);
+	rte_eal_pci_unmap_device(pci_dev);
+
+	PMD_INIT_LOG(DEBUG, "dev_uninit completed");
+
+	return 0;
+}
+
+static struct eth_driver rte_virtio_pmd = {
+	.pci_drv = {
+		.name = "rte_virtio_pmd",
+		.id_table = pci_id_virtio_map,
+		.drv_flags = RTE_PCI_DRV_DETACHABLE,
+	},
+	.eth_dev_init = eth_virtio_dev_init,
+	.eth_dev_uninit = eth_virtio_dev_uninit,
+	.dev_private_size = sizeof(struct virtio_hw),
+};
+
+/*
+ * Driver initialization routine.
+ * Invoked once at EAL init time.
+ * Register itself as the [Poll Mode] Driver of PCI virtio devices.
+ * Returns 0 on success.
+ */
+static int
+rte_virtio_pmd_init(const char *name __rte_unused,
+		    const char *param __rte_unused)
+{
+	if (rte_eal_iopl_init() != 0) {
+		PMD_INIT_LOG(ERR, "IOPL call failed - cannot use virtio PMD");
+		return -1;
+	}
+
+	rte_eth_driver_register(&rte_virtio_pmd);
+	return 0;
+}
+
+/*
+ * 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;
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct rte_pci_device *pci_dev = dev->pci_dev;
+
+	PMD_INIT_LOG(DEBUG, "configure");
+
+	if (rxmode->hw_ip_checksum) {
+		PMD_DRV_LOG(ERR, "HW IP checksum not supported");
+		return -EINVAL;
+	}
+
+	hw->vlan_strip = rxmode->hw_vlan_strip;
+
+	if (rxmode->hw_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 (pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)
+		if (vtpci_irq_config(hw, 0) == VIRTIO_MSI_NO_VECTOR) {
+			PMD_DRV_LOG(ERR, "failed to set config vector");
+			return -EBUSY;
+		}
+
+	return 0;
+}
+
+
+static int
+virtio_dev_start(struct rte_eth_dev *dev)
+{
+	uint16_t nb_queues, i;
+	struct virtio_hw *hw = dev->data->dev_private;
+	struct rte_pci_device *pci_dev = dev->pci_dev;
+
+	/* check if lsc interrupt feature is enabled */
+	if (dev->data->dev_conf.intr_conf.lsc) {
+		if (!(pci_dev->driver->drv_flags & RTE_PCI_DRV_INTR_LSC)) {
+			PMD_DRV_LOG(ERR, "link status not supported by host");
+			return -ENOTSUP;
+		}
+
+		if (rte_intr_enable(&dev->pci_dev->intr_handle) < 0) {
+			PMD_DRV_LOG(ERR, "interrupt enable failed");
+			return -EIO;
+		}
+	}
+
+	/* Initialize Link state */
+	virtio_dev_link_update(dev, 0);
+
+	/* On restart after stop do not touch queues */
+	if (hw->started)
+		return 0;
+
+	/* Do final configuration before rx/tx engine starts */
+	virtio_dev_rxtx_start(dev);
+	vtpci_reinit_complete(hw);
+
+	hw->started = 1;
+
+	/*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 = dev->data->nb_rx_queues;
+	if (nb_queues > 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 < nb_queues; i++)
+		virtqueue_notify(dev->data->rx_queues[i]);
+
+	PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++)
+		VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
+
+	for (i = 0; i < dev->data->nb_tx_queues; i++)
+		VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
+
+	return 0;
+}
+
+static void virtio_dev_free_mbufs(struct rte_eth_dev *dev)
+{
+	struct rte_mbuf *buf;
+	int i, mbuf_num = 0;
+
+	for (i = 0; i < dev->data->nb_rx_queues; i++) {
+		PMD_INIT_LOG(DEBUG,
+			     "Before freeing rxq[%d] used and unused buf", i);
+		VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
+
+		PMD_INIT_LOG(DEBUG, "rx_queues[%d]=%p",
+				i, dev->data->rx_queues[i]);
+		while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
+					dev->data->rx_queues[i])) != NULL) {
+			rte_pktmbuf_free(buf);
+			mbuf_num++;
+		}
+
+		PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
+		PMD_INIT_LOG(DEBUG,
+			     "After freeing rxq[%d] used and unused buf", i);
+		VIRTQUEUE_DUMP((struct virtqueue *)dev->data->rx_queues[i]);
+	}
+
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		PMD_INIT_LOG(DEBUG,
+			     "Before freeing txq[%d] used and unused bufs",
+			     i);
+		VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
+
+		mbuf_num = 0;
+		while ((buf = (struct rte_mbuf *)virtqueue_detatch_unused(
+					dev->data->tx_queues[i])) != NULL) {
+			rte_pktmbuf_free(buf);
+
+			mbuf_num++;
+		}
+
+		PMD_INIT_LOG(DEBUG, "free %d mbufs", mbuf_num);
+		PMD_INIT_LOG(DEBUG,
+			     "After freeing txq[%d] used and unused buf", i);
+		VIRTQUEUE_DUMP((struct virtqueue *)dev->data->tx_queues[i]);
+	}
+}
+
+/*
+ * Stop device: disable interrupt and mark link down
+ */
+static void
+virtio_dev_stop(struct rte_eth_dev *dev)
+{
+	struct rte_eth_link link;
+	struct virtio_hw *hw = dev->data->dev_private;
+
+	PMD_INIT_LOG(DEBUG, "stop");
+
+	hw->started = 0;
+
+	if (dev->data->dev_conf.intr_conf.lsc)
+		rte_intr_disable(&dev->pci_dev->intr_handle);
+
+	memset(&link, 0, sizeof(link));
+	virtio_dev_atomic_write_link_status(dev, &link);
+}
+
+static int
+virtio_dev_link_update(struct rte_eth_dev *dev, __rte_unused int wait_to_complete)
+{
+	struct rte_eth_link link, old;
+	uint16_t status;
+	struct virtio_hw *hw = dev->data->dev_private;
+	memset(&link, 0, sizeof(link));
+	virtio_dev_atomic_read_link_status(dev, &link);
+	old = link;
+	link.link_duplex = ETH_LINK_FULL_DUPLEX;
+	link.link_speed  = SPEED_10G;
+
+	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;
+	}
+	virtio_dev_atomic_write_link_status(dev, &link);
+
+	return (old.link_status == link.link_status) ? -1 : 0;
+}
+
+static void
+virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
+{
+	struct virtio_hw *hw = dev->data->dev_private;
+
+	dev_info->driver_name = dev->driver->pci_drv.name;
+	dev_info->max_rx_queues = (uint16_t)hw->max_rx_queues;
+	dev_info->max_tx_queues = (uint16_t)hw->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;
+	dev_info->default_txconf = (struct rte_eth_txconf) {
+		.txq_flags = ETH_TXQ_FLAGS_NOOFFLOADS
+	};
+}
+
+/*
+ * 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;
+}
+
+static struct rte_driver rte_virtio_driver = {
+	.type = PMD_PDEV,
+	.init = rte_virtio_pmd_init,
+};
+
+PMD_REGISTER_DRIVER(rte_virtio_driver);