* and the University of New Mexico. You can find out more at
* http://www.v3vee.org
*
- * Copyright (c) 2008, Lei Xia <lxia@northwestern.edu>
- * Copyright (c) 2008, Cui Zheng <cuizheng@cs.unm.edu>
- * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
+ * Copyright (c) 2010, Lei Xia <lxia@northwestern.edu>
+ * Copyright (c) 2010, Cui Zheng <cuizheng@cs.unm.edu>
+ * Copyright (c) 2010, The V3VEE Project <http://www.v3vee.org>
* All rights reserved.
*
* Author: Lei Xia <lxia@northwestern.edu>
- * Cui Zheng <cuizheng@cs.unm.edu>
+ * Cui Zheng <cuizheng@cs.unm.edu>
*
*
* This is free software. You are permitted to use,
#include <palacios/vmm_vnet.h>
#include <palacios/vmm_lock.h>
#include <palacios/vmm_util.h>
-
#include <devices/pci.h>
uint8_t gso_type;
uint16_t hdr_len; /* Ethernet + IP + tcp/udp hdrs */
uint16_t gso_size; /* Bytes to append to hdr_len per frame */
- uint16_t csum_start; /* Position to start checksumming from */
- uint16_t csum_offset; /* Offset after that to place checksum */
+ uint16_t csum_start; /* Position to start checksumming from */
+ uint16_t csum_offset; /* Offset after that to place checksum */
}__attribute__((packed));
+
+/* This is the version of the header to use when the MRG_RXBUF
+ * feature has been negotiated. */
+struct virtio_net_hdr_mrg_rxbuf {
+ struct virtio_net_hdr hdr;
+ uint16_t num_buffers; /* Number of merged rx buffers */
+};
+
-#define QUEUE_SIZE 1024
+#define TX_QUEUE_SIZE 64
+#define RX_QUEUE_SIZE 1024
#define CTRL_QUEUE_SIZE 64
#define ETH_ALEN 6
+#define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
+#define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
+#define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
+#define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
+
struct virtio_net_config
{
- uint8_t mac[ETH_ALEN]; //VIRTIO_NET_F_MAC
+ uint8_t mac[ETH_ALEN]; /* VIRTIO_NET_F_MAC */
uint16_t status;
} __attribute__((packed));
struct pci_device * pci_dev;
int io_range_size;
- struct virtio_queue rx_vq; //index 0, rvq in Linux virtio driver, handle packet to guest
- struct virtio_queue tx_vq; //index 1, svq in Linux virtio driver, handle packet from guest
- struct virtio_queue ctrl_vq; //index 2, ctrol info from guest
+ struct virtio_queue rx_vq; /* idx 0, pkts to guest */
+ struct virtio_queue tx_vq; /* idx 1, pkts from guest */
+ struct virtio_queue ctrl_vq; /* idx 2 */
- ulong_t pkt_sent, pkt_recv, pkt_drop;
+ int buffed_rx;
+ int tx_disabled; /* stop TX pkts from guest */
+ uint16_t cur_notify_tx_idx; /*for used in update_tx_queue */
- struct v3_dev_net_ops * net_ops;
+ uint64_t pkt_sent, pkt_recv, pkt_drop;
+ uint64_t tx_stop_times, rx_stop_times, tx_poll_times, rx_ipi_num;
- v3_lock_t lock;
+ struct v3_dev_net_ops * net_ops;
+ v3_lock_t rx_lock, tx_lock;
void * backend_data;
struct virtio_dev_state * virtio_dev;
struct list_head dev_link;
};
+/* virtio nic error type */
+#define ERR_VIRTIO_OTHER 1
+#define ERR_VIRTIO_RXQ_FULL 2
+#define ERR_VIRTIO_RXQ_NOSET 3
+#define ERR_VIRTIO_TXQ_NOSET 4
+#define ERR_VIRTIO_TXQ_FULL 5
+#define ERR_VIRTIO_TXQ_DISABLED 6
+
+
static int virtio_free(struct vm_device * dev)
{
- return -1;
+ return 0;
}
static int virtio_init_state(struct virtio_net_state * virtio)
{
+ virtio->rx_vq.queue_size = RX_QUEUE_SIZE;
+ virtio->tx_vq.queue_size = TX_QUEUE_SIZE;
+ virtio->ctrl_vq.queue_size = CTRL_QUEUE_SIZE;
+
virtio->rx_vq.ring_desc_addr = 0;
virtio->rx_vq.ring_avail_addr = 0;
virtio->rx_vq.ring_used_addr = 0;
virtio->ctrl_vq.pfn = 0;
virtio->ctrl_vq.cur_avail_idx = 0;
- virtio->virtio_cfg.host_features = 0;
- //virtio->virtio_cfg.status = VIRTIO_NET_S_LINK_UP;
virtio->virtio_cfg.pci_isr = 0;
+
+ virtio->virtio_cfg.host_features = 0; // (1 << VIRTIO_NET_F_MAC);
- if (v3_lock_init(&(virtio->lock)) == -1){
- PrintError("Virtio NIC: Failure to init lock for net_state\n");
+ if ((v3_lock_init(&(virtio->rx_lock)) == -1) ||
+ (v3_lock_init(&(virtio->tx_lock)) == -1)){
+ PrintError("Virtio NIC: Failure to init locks for net_state\n");
}
virtio->pkt_sent = virtio->pkt_recv = virtio->pkt_drop = 0;
+ virtio->buffed_rx = 0;
return 0;
}
uint8_t * buf = NULL;
uint32_t len = buf_desc->length;
- PrintDebug("Virtio NIC: Virtio Pkt Sending, net_state: %p, pkt size: %d\n", virtio, len);
-
- if (guest_pa_to_host_va(core, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
+ if (v3_gpa_to_hva(core, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
PrintError("Could not translate buffer address\n");
- return -1;
+ return -ERR_VIRTIO_OTHER;
}
- if (virtio->net_ops->send(buf, len, virtio->backend_data, NULL) == -1) {
- return -1;
- }
-
- return 0;
+ return virtio->net_ops->send(buf, len, virtio->backend_data, NULL);
}
-static int build_receive_header(struct virtio_net_hdr * hdr, const void * buf, int raw) {
- hdr->flags = 0;
-
- if (!raw) {
- memcpy(hdr, buf, sizeof(struct virtio_net_hdr));
- } else {
- memset(hdr, 0, sizeof(struct virtio_net_hdr));
- }
-
- return 0;
-}
static int copy_data_to_desc(struct guest_info *core,
struct virtio_net_state * virtio_state,
struct vring_desc * desc,
uchar_t * buf,
- uint_t buf_len)
+ uint_t buf_len,
+ uint_t offset)
{
uint32_t len;
uint8_t * desc_buf = NULL;
- if (guest_pa_to_host_va(core, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
+ if (v3_gpa_to_hva(core, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
PrintError("Could not translate buffer address\n");
return -1;
}
- len = (desc->length < buf_len)?desc->length:buf_len;
- memcpy(desc_buf, buf, len);
+ len = (desc->length < buf_len)?(desc->length - offset):buf_len;
+ memcpy(desc_buf+offset, buf, len);
return len;
}
-
-
static int get_desc_count(struct virtio_queue * q, int index) {
struct vring_desc * tmp_desc = &(q->desc[index]);
int cnt = 1;
return cnt;
}
-static int handle_ctrl(struct guest_info *core, struct virtio_net_state * dev) {
+static inline void enable_cb(struct virtio_queue *queue){
+ queue->used->flags &= ~ VRING_NO_NOTIFY_FLAG;
+}
+
+static inline void disable_cb(struct virtio_queue *queue) {
+ queue->used->flags |= VRING_NO_NOTIFY_FLAG;
+}
+
+/* interrupt the guest, so the guest core get EXIT to Palacios
+ * this happens when there are either incoming pkts for the guest
+ * or the guest can start TX pkts again */
+static inline void notify_guest(struct virtio_net_state * virtio){
+ v3_interrupt_cpu(virtio->virtio_dev->vm, virtio->virtio_dev->vm->cores[0].cpu_id, 0);
+}
+
+
+/* guest free some pkts from rx queue */
+static int handle_rx_kick(struct guest_info *core, struct virtio_net_state * virtio)
+{
+ unsigned long flags;
+
+ flags = v3_lock_irqsave(virtio->rx_lock);
+
+ virtio->net_ops->start_rx(virtio->backend_data);
+ disable_cb(&virtio->rx_vq);
+
+ v3_unlock_irqrestore(virtio->rx_lock, flags);
+
+ return 0;
+}
+
+#ifdef CONFIG_VNET_PROFILE
+static void print_profile_info(struct virtio_net_state *virtio){
+ PrintError("Virtio NIC: %p, sent: %lld, rxed: %lld, dropped: %lld, \
+ tx_stop: %lld, rx_stop: %lld, poll_time: %lld, rx_ipi: %lld\n",
+ virtio,
+ virtio->pkt_sent,
+ virtio->pkt_recv,
+ virtio->pkt_drop,
+ virtio->tx_stop_times,
+ virtio->rx_stop_times,
+ virtio->tx_poll_times,
+ virtio->rx_ipi_num);
+}
+#endif
+
+static int handle_ctrl(struct guest_info *core, struct virtio_net_state * virtio) {
+
return 0;
}
{
struct virtio_queue * q = &(virtio_state->tx_vq);
struct virtio_net_hdr * hdr = NULL;
+ int recved = 0;
+ unsigned long flags;
+
+ if (!q->ring_avail_addr)
+ return -ERR_VIRTIO_TXQ_NOSET;
+ if(virtio_state->tx_disabled)
+ return -ERR_VIRTIO_TXQ_DISABLED;
+ flags = v3_lock_irqsave(virtio_state->tx_lock);
while (q->cur_avail_idx != q->avail->index) {
struct vring_desc * hdr_desc = NULL;
addr_t hdr_addr = 0;
int i = 0;
hdr_desc = &(q->desc[desc_idx]);
- if (guest_pa_to_host_va(core, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
+ if (v3_gpa_to_hva(core, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
PrintError("Could not translate block header address\n");
- return -1;
+ goto exit_error;
}
hdr = (struct virtio_net_hdr*)hdr_addr;
desc_idx = hdr_desc->next;
-
+
+ if(desc_cnt > 2){
+ PrintError("VNIC: merged rx buffer not supported\n");
+ goto exit_error;
+ }
+
+ /* here we assumed that one ethernet pkt is not splitted into multiple virtio buffer */
for (i = 0; i < desc_cnt - 1; i++) {
struct vring_desc * buf_desc = &(q->desc[desc_idx]);
if (pkt_tx(core, virtio_state, buf_desc) == -1) {
PrintError("Error handling nic operation\n");
- return -1;
+ goto exit_error;
}
req_len += buf_desc->length;
desc_idx = buf_desc->next;
}
virtio_state->pkt_sent ++;
+ recved ++;
q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
q->used->ring[q->used->index % q->queue_size].length = req_len; // What do we set this to????
- q->used->index++;
-
+ q->used->index ++;
+
q->cur_avail_idx ++;
}
+ v3_unlock_irqrestore(virtio_state->tx_lock, flags);
+
+ if(!recved)
+ return 0;
+
if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
v3_pci_raise_irq(virtio_state->virtio_dev->pci_bus, 0, virtio_state->pci_dev);
virtio_state->virtio_cfg.pci_isr = 0x1;
}
+
+#ifdef CONFIG_VNET_PROFILE
+ static long min = 1024, max = 0, total=0;
+ static int i=0;
+ total += recved;
+ i ++;
+ if(recved > max) max = recved;
+ if(recved < min) min = recved;
+ if(total > 100000) {
+ PrintError("VNIC: TX polling: %ld, min %ld, max %ld, avg: %ld pkts\n", total, min, max, total/i);
+ min = 1024;
+ max = 0;
+ i = 1;
+ total = 0;
+ }
+#endif
+
+
return 0;
+
+exit_error:
+
+ v3_unlock_irqrestore(virtio_state->tx_lock, flags);
+ return -ERR_VIRTIO_OTHER;
}
static int virtio_setup_queue(struct guest_info *core,
- struct virtio_net_state * virtio_state,
- struct virtio_queue * queue,
+ struct virtio_net_state * virtio_state,
+ struct virtio_queue * queue,
addr_t pfn,
addr_t page_addr) {
queue->pfn = pfn;
// round up to next page boundary.
queue->ring_used_addr = (queue->ring_used_addr + 0xfff) & ~0xfff;
- if (guest_pa_to_host_va(core, queue->ring_desc_addr, (addr_t *)&(queue->desc)) == -1) {
+ if (v3_gpa_to_hva(core, queue->ring_desc_addr, (addr_t *)&(queue->desc)) == -1) {
PrintError("Could not translate ring descriptor address\n");
return -1;
}
- if (guest_pa_to_host_va(core, queue->ring_avail_addr, (addr_t *)&(queue->avail)) == -1) {
+ if (v3_gpa_to_hva(core, queue->ring_avail_addr, (addr_t *)&(queue->avail)) == -1) {
PrintError("Could not translate ring available address\n");
return -1;
}
- if (guest_pa_to_host_va(core, queue->ring_used_addr, (addr_t *)&(queue->used)) == -1) {
+ if (v3_gpa_to_hva(core, queue->ring_used_addr, (addr_t *)&(queue->used)) == -1) {
PrintError("Could not translate ring used address\n");
return -1;
}
return -1;
}
virtio->virtio_cfg.guest_features = *(uint32_t *)src;
- PrintDebug("Setting Guest Features to %x\n", virtio->virtio_cfg.guest_features);
break;
case VRING_PG_NUM_PORT:
addr_t pfn = *(uint32_t *)src;
addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
-
- PrintDebug("Virtio Write: pfn: %p, page_addr %p, queue_idx %d\n", (void *)pfn, (void *)page_addr, queue_idx);
-
switch (queue_idx) {
case 0:
virtio_setup_queue(core, virtio, &virtio->rx_vq, pfn, page_addr);
+ disable_cb(&virtio->rx_vq);
break;
case 1:
virtio_setup_queue(core, virtio, &virtio->tx_vq, pfn, page_addr);
+ disable_cb(&virtio->tx_vq);
break;
case 2:
virtio_setup_queue(core, virtio, &virtio->ctrl_vq, pfn, page_addr);
case VRING_Q_SEL_PORT:
virtio->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
if (virtio->virtio_cfg.vring_queue_selector > 2) {
- PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
+ PrintError("Virtio NIC: wrong queue idx: %d\n",
virtio->virtio_cfg.vring_queue_selector);
return -1;
}
{
uint16_t queue_idx = *(uint16_t *)src;
if (queue_idx == 0){
- PrintDebug("receive queue notification 0, packet get by Guest\n");
+ handle_rx_kick(core, virtio);
+ PrintError("rx kick\n");
} else if (queue_idx == 1){
+ PrintError("tx kick\n");
if (handle_pkt_tx(core, virtio) == -1) {
PrintError("Could not handle NIC Notification\n");
return -1;
return -1;
}
} else {
- PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
- queue_idx);
+ PrintError("Wrong queue index %d\n", queue_idx);
}
break;
}
case VIRTIO_ISR_PORT:
virtio->virtio_cfg.pci_isr = *(uint8_t *)src;
break;
+
default:
return -1;
break;
default:
break;
}
- PrintDebug("queue index: %d, value=0x%x\n", (int)queue_idx, *(uint16_t *)dst);
break;
case VIRTIO_STATUS_PORT:
break;
default:
- PrintError("Virtio NIC: Read of Unhandled Virtio Read\n");
+ PrintError("Virtio NIC: Read of Unhandled Virtio Read:%d\n", port_idx);
return -1;
}
}
-
-
static int virtio_rx(uint8_t * buf, uint32_t size, void * private_data) {
struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
struct virtio_queue * q = &(virtio->rx_vq);
- struct virtio_net_hdr hdr;
- uint32_t hdr_len = sizeof(struct virtio_net_hdr);
+ struct virtio_net_hdr_mrg_rxbuf hdr;
+ uint32_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
uint32_t data_len = size;
uint32_t offset = 0;
unsigned long flags;
- int ret_val = -1;
+ int ret_val = -ERR_VIRTIO_OTHER;
int raw = 1;
- flags = v3_lock_irqsave(virtio->lock);
-
- PrintDebug("VIRTIO NIC: receiving packet to virtio nic %p, size:%d\n", virtio, size);
+ flags = v3_lock_irqsave(virtio->rx_lock);
virtio->pkt_recv ++;
-
- if (!raw){
+ if (!raw)
data_len -= hdr_len;
- }
- build_receive_header(&hdr, buf, raw);
+ if (!raw)
+ memcpy(&hdr, buf, sizeof(struct virtio_net_hdr_mrg_rxbuf));
+ else
+ memset(&hdr, 0, sizeof(struct virtio_net_hdr_mrg_rxbuf));
if (q->ring_avail_addr == 0) {
PrintError("Queue is not set\n");
+ ret_val = -ERR_VIRTIO_RXQ_NOSET;
goto exit;
}
struct vring_desc * hdr_desc = NULL;
hdr_desc = &(q->desc[hdr_idx]);
- if (guest_pa_to_host_va(&(virtio->virtio_dev->vm->cores[0]), hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
+ if (v3_gpa_to_hva(&(virtio->virtio_dev->vm->cores[0]), hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
PrintError("Could not translate receive buffer address\n");
- ret_val = -1;
goto exit;
}
-
- memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr));
+ hdr.num_buffers = 1;
+ memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr_mrg_rxbuf));
if (offset >= data_len) {
hdr_desc->flags &= ~VIRTIO_NEXT_FLAG;
}
+ struct vring_desc * buf_desc = NULL;
for (buf_idx = hdr_desc->next; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
- struct vring_desc * buf_desc = &(q->desc[buf_idx]);
uint32_t len = 0;
+ buf_desc = &(q->desc[buf_idx]);
- len = copy_data_to_desc(&(virtio->virtio_dev->vm->cores[0]), virtio, buf_desc, buf + offset, data_len - offset);
+ len = copy_data_to_desc(&(virtio->virtio_dev->vm->cores[0]), virtio, buf_desc, buf + offset, data_len - offset, 0);
offset += len;
if (offset < data_len) {
buf_desc->flags = VIRTIO_NEXT_FLAG;
}
buf_desc->length = len;
}
+ buf_desc->flags &= ~VIRTIO_NEXT_FLAG;
q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
- q->used->ring[q->used->index % q->queue_size].length = data_len + hdr_len; // This should be the total length of data sent to guest (header+pkt_data)
+ q->used->ring[q->used->index % q->queue_size].length = data_len + hdr_len; /* This should be the total length of data sent to guest (header+pkt_data) */
q->used->index++;
-
q->cur_avail_idx++;
+
+ /* if there are certain num of pkts in the RX queue, notify guest
+ * so guest will exit to palacios
+ * when it returns, guest gets the virtio rx interrupt */
+ if((++virtio->buffed_rx > q->queue_size/5) &&
+ (q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
+ if(virtio->virtio_dev->vm->cores[0].cpu_id != V3_Get_CPU()){
+ notify_guest(virtio);
+ virtio->rx_ipi_num ++;
+ }
+ virtio->buffed_rx = 0;
+ }
} else {
virtio->pkt_drop++;
+ /* RX queue is full, tell backend to stop RX on this device */
+ virtio->net_ops->stop_rx(virtio->backend_data);
+ enable_cb(&virtio->rx_vq);
+
+ virtio->rx_stop_times ++;
+
+ ret_val = -ERR_VIRTIO_RXQ_FULL;
+ goto exit;
}
if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
exit:
- v3_unlock_irqrestore(virtio->lock, flags);
+ v3_unlock_irqrestore(virtio->rx_lock, flags);
return ret_val;
}
.stop = NULL,
};
+
+/* TODO: Issue here: which vm info it needs? calling VM or the device's own VM? */
+static void virtio_nic_poll(struct v3_vm_info *vm, void *data){
+ struct virtio_net_state *virtio = (struct virtio_net_state *)data;
+
+ handle_pkt_tx(&(vm->cores[0]), virtio);
+
+ virtio->tx_poll_times ++;
+
+#ifdef CONFIG_VNET_PROFILE
+ static uint64_t last_time = 0;
+ uint64_t time;
+ rdtscll(time);
+ if((time - last_time) > 5000000000){
+ last_time = time;
+ print_profile_info(virtio);
+ }
+#endif
+}
+
+static void virtio_start_tx(void *data){
+ struct virtio_net_state * virtio = (struct virtio_net_state *)data;
+
+ /* do we need a lock here? */
+ virtio->tx_disabled = 0;
+
+ /* notify the device's guest it can start sending pkt */
+ if(virtio->virtio_dev->vm->cores[0].cpu_id != V3_Get_CPU()){
+ notify_guest(virtio);
+ }
+}
+
+static void virtio_stop_tx(void *data){
+ struct virtio_net_state * virtio = (struct virtio_net_state *)data;
+
+ /* do we need a lock here? */
+ virtio->tx_disabled = 1;
+
+ /* how do we stop the guest to exit to palacios for sending pkt? */
+ if(virtio->virtio_dev->vm->cores[0].cpu_id != V3_Get_CPU()){
+ disable_cb(&virtio->tx_vq);
+ }
+
+ virtio->tx_stop_times ++;
+}
+
+
+
+
static int register_dev(struct virtio_dev_state * virtio, struct virtio_net_state * net_state)
{
struct pci_device * pci_dev = NULL;
bars[0].private_data = net_state;
pci_dev = v3_pci_register_device(virtio->pci_bus, PCI_STD_DEVICE,
- 0, PCI_AUTO_DEV_NUM, 0,
+ 0, 4/*PCI_AUTO_DEV_NUM*/, 0,
"LNX_VIRTIO_NIC", bars,
NULL, NULL, NULL, net_state);
pci_dev->config_header.intr_pin = 1;
pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
- net_state->pci_dev = pci_dev;
- net_state->virtio_cfg.host_features = 0; //no features support now
- net_state->rx_vq.queue_size = QUEUE_SIZE;
- net_state->tx_vq.queue_size = QUEUE_SIZE;
- net_state->ctrl_vq.queue_size = CTRL_QUEUE_SIZE;
+ net_state->pci_dev = pci_dev;
net_state->virtio_dev = virtio;
-
+
+ uchar_t mac[6] = {0x11,0x11,0x11,0x11,0x11,0x11};
+ memcpy(net_state->net_cfg.mac, mac, 6);
+
+ memcpy(pci_dev->config_data, net_state->net_cfg.mac, ETH_ALEN);
+
virtio_init_state(net_state);
+#if 0 //temporary hacking LX
+ vnic_states[num_vnic ++] = net_state;
+ PrintError("VNIC: num of vnic %d\n", num_vnic);
+#endif
+
return 0;
}
net_state->backend_data = private_data;
ops->recv = virtio_rx;
+ ops->poll = virtio_nic_poll;
+ ops->start_tx = virtio_start_tx;
+ ops->stop_tx = virtio_stop_tx;
ops->frontend_data = net_state;
return 0;