2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2010, Lei Xia <lxia@northwestern.edu>
11 * Copyright (c) 2010, Cui Zheng <cuizheng@cs.unm.edu>
12 * Copyright (c) 2010, The V3VEE Project <http://www.v3vee.org>
13 * All rights reserved.
15 * Author: Lei Xia <lxia@northwestern.edu>
16 * Cui Zheng <cuizheng@cs.unm.edu>
19 * This is free software. You are permitted to use,
20 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
23 #include <palacios/vmm.h>
24 #include <palacios/vmm_dev_mgr.h>
25 #include <devices/lnx_virtio_pci.h>
26 #include <palacios/vm_guest_mem.h>
27 #include <palacios/vmm_sprintf.h>
28 #include <palacios/vmm_vnet.h>
29 #include <palacios/vmm_lock.h>
30 #include <palacios/vmm_util.h>
31 #include <devices/pci.h>
34 #ifndef CONFIG_DEBUG_VIRTIO_NET
36 #define PrintDebug(fmt, args...)
39 #define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
40 #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
42 struct virtio_net_hdr {
45 #define VIRTIO_NET_HDR_GSO_NONE 0 /* Not a GSO frame */
47 uint16_t hdr_len; /* Ethernet + IP + tcp/udp hdrs */
48 uint16_t gso_size; /* Bytes to append to hdr_len per frame */
49 uint16_t csum_start; /* Position to start checksumming from */
50 uint16_t csum_offset; /* Offset after that to place checksum */
51 }__attribute__((packed));
54 /* This is the version of the header to use when the MRG_RXBUF
55 * feature has been negotiated. */
56 struct virtio_net_hdr_mrg_rxbuf {
57 struct virtio_net_hdr hdr;
58 uint16_t num_buffers; /* Number of merged rx buffers */
62 #define TX_QUEUE_SIZE 64
63 #define RX_QUEUE_SIZE 1024
64 #define CTRL_QUEUE_SIZE 64
67 #define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
68 #define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
69 #define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
70 #define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
72 struct virtio_net_config
74 uint8_t mac[ETH_ALEN]; /* VIRTIO_NET_F_MAC */
76 } __attribute__((packed));
78 struct virtio_dev_state {
79 struct vm_device * pci_bus;
80 struct list_head dev_list;
81 struct v3_vm_info *vm;
84 struct virtio_net_state {
85 struct virtio_net_config net_cfg;
86 struct virtio_config virtio_cfg;
88 struct vm_device * dev;
89 struct pci_device * pci_dev;
92 struct virtio_queue rx_vq; /* idx 0, pkts to guest */
93 struct virtio_queue tx_vq; /* idx 1, pkts from guest */
94 struct virtio_queue ctrl_vq; /* idx 2 */
97 int tx_disabled; /* stop TX pkts from guest */
99 uint64_t pkt_sent, pkt_recv, pkt_drop;
101 struct v3_dev_net_ops * net_ops;
102 v3_lock_t rx_lock, tx_lock;
105 struct virtio_dev_state * virtio_dev;
106 struct list_head dev_link;
109 /* virtio nic error type */
110 #define ERR_VIRTIO_OTHER 1
111 #define ERR_VIRTIO_RXQ_FULL 2
112 #define ERR_VIRTIO_RXQ_NOSET 3
113 #define ERR_VIRTIO_TXQ_NOSET 4
114 #define ERR_VIRTIO_TXQ_FULL 5
115 #define ERR_VIRTIO_TXQ_DISABLED 6
120 static int virtio_init_state(struct virtio_net_state * virtio)
122 virtio->rx_vq.queue_size = RX_QUEUE_SIZE;
123 virtio->tx_vq.queue_size = TX_QUEUE_SIZE;
124 virtio->ctrl_vq.queue_size = CTRL_QUEUE_SIZE;
126 virtio->rx_vq.ring_desc_addr = 0;
127 virtio->rx_vq.ring_avail_addr = 0;
128 virtio->rx_vq.ring_used_addr = 0;
129 virtio->rx_vq.pfn = 0;
130 virtio->rx_vq.cur_avail_idx = 0;
132 virtio->tx_vq.ring_desc_addr = 0;
133 virtio->tx_vq.ring_avail_addr = 0;
134 virtio->tx_vq.ring_used_addr = 0;
135 virtio->tx_vq.pfn = 0;
136 virtio->tx_vq.cur_avail_idx = 0;
138 virtio->ctrl_vq.ring_desc_addr = 0;
139 virtio->ctrl_vq.ring_avail_addr = 0;
140 virtio->ctrl_vq.ring_used_addr = 0;
141 virtio->ctrl_vq.pfn = 0;
142 virtio->ctrl_vq.cur_avail_idx = 0;
144 virtio->virtio_cfg.pci_isr = 0;
146 virtio->virtio_cfg.host_features = 0; // (1 << VIRTIO_NET_F_MAC);
148 if ((v3_lock_init(&(virtio->rx_lock)) == -1) ||
149 (v3_lock_init(&(virtio->tx_lock)) == -1)){
150 PrintError("Virtio NIC: Failure to init locks for net_state\n");
153 virtio->pkt_sent = virtio->pkt_recv = virtio->pkt_drop = 0;
154 virtio->buffed_rx = 0;
160 pkt_tx(struct guest_info * core,
161 struct virtio_net_state * virtio,
162 struct vring_desc * buf_desc)
164 uint8_t * buf = NULL;
165 uint32_t len = buf_desc->length;
167 if (v3_gpa_to_hva(core, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
168 PrintError("Could not translate buffer address\n");
169 return -ERR_VIRTIO_OTHER;
172 return virtio->net_ops->send(buf, len, virtio->backend_data);
177 copy_data_to_desc(struct guest_info * core,
178 struct virtio_net_state * virtio_state,
179 struct vring_desc * desc,
185 uint8_t * desc_buf = NULL;
187 if (v3_gpa_to_hva(core, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
188 PrintError("Could not translate buffer address\n");
191 len = (desc->length < buf_len)?(desc->length - offset):buf_len;
192 memcpy(desc_buf+offset, buf, len);
198 static int get_desc_count(struct virtio_queue * q, int index) {
199 struct vring_desc * tmp_desc = &(q->desc[index]);
202 while (tmp_desc->flags & VIRTIO_NEXT_FLAG) {
203 tmp_desc = &(q->desc[tmp_desc->next]);
210 static inline void enable_cb(struct virtio_queue *queue){
211 queue->used->flags &= ~ VRING_NO_NOTIFY_FLAG;
214 static inline void disable_cb(struct virtio_queue *queue) {
215 queue->used->flags |= VRING_NO_NOTIFY_FLAG;
219 /* interrupt the guest, so the guest core get EXIT to Palacios
220 * this happens when there are either incoming pkts for the guest
221 * or the guest can start TX pkts again */
222 static inline void notify_guest(struct virtio_net_state * virtio){
223 v3_interrupt_cpu(virtio->virtio_dev->vm, virtio->virtio_dev->vm->cores[0].cpu_id, 0);
227 /* guest free some pkts from rx queue */
228 static int handle_rx_kick(struct guest_info *core,
229 struct virtio_net_state * virtio)
233 flags = v3_lock_irqsave(virtio->rx_lock);
235 if(virtio->net_ops->start_rx != NULL){
236 virtio->net_ops->start_rx(virtio->backend_data);
238 //disable_cb(&virtio->rx_vq);
240 v3_unlock_irqrestore(virtio->rx_lock, flags);
246 static int handle_ctrl(struct guest_info *core,
247 struct virtio_net_state * virtio) {
252 static int handle_pkt_tx(struct guest_info *core,
253 struct virtio_net_state * virtio_state)
255 struct virtio_queue * q = &(virtio_state->tx_vq);
256 struct virtio_net_hdr * hdr = NULL;
260 if (!q->ring_avail_addr)
261 return -ERR_VIRTIO_TXQ_NOSET;
263 if(virtio_state->tx_disabled)
264 return -ERR_VIRTIO_TXQ_DISABLED;
266 flags = v3_lock_irqsave(virtio_state->tx_lock);
267 while (q->cur_avail_idx != q->avail->index) {
268 struct vring_desc * hdr_desc = NULL;
270 uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
271 int desc_cnt = get_desc_count(q, desc_idx);
272 uint32_t req_len = 0;
275 hdr_desc = &(q->desc[desc_idx]);
276 if (v3_gpa_to_hva(core, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
277 PrintError("Could not translate block header address\n");
281 hdr = (struct virtio_net_hdr*)hdr_addr;
282 desc_idx = hdr_desc->next;
285 PrintError("VNIC: merged rx buffer not supported\n");
289 /* here we assumed that one ethernet pkt is not splitted into multiple virtio buffer */
290 for (i = 0; i < desc_cnt - 1; i++) {
291 struct vring_desc * buf_desc = &(q->desc[desc_idx]);
292 if (pkt_tx(core, virtio_state, buf_desc) == -1) {
293 PrintError("Error handling nic operation\n");
297 req_len += buf_desc->length;
298 desc_idx = buf_desc->next;
300 virtio_state->pkt_sent ++;
303 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
304 q->used->ring[q->used->index % q->queue_size].length = req_len; // What do we set this to????
310 v3_unlock_irqrestore(virtio_state->tx_lock, flags);
315 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
316 v3_pci_raise_irq(virtio_state->virtio_dev->pci_bus, 0, virtio_state->pci_dev);
317 virtio_state->virtio_cfg.pci_isr = 0x1;
324 v3_unlock_irqrestore(virtio_state->tx_lock, flags);
325 return -ERR_VIRTIO_OTHER;
329 static int virtio_setup_queue(struct guest_info *core,
330 struct virtio_net_state * virtio_state,
331 struct virtio_queue * queue,
332 addr_t pfn, addr_t page_addr) {
335 queue->ring_desc_addr = page_addr;
336 queue->ring_avail_addr = page_addr + (queue->queue_size * sizeof(struct vring_desc));
337 queue->ring_used_addr = ((queue->ring_avail_addr) +
338 (sizeof(struct vring_avail)) +
339 (queue->queue_size * sizeof(uint16_t)));
341 // round up to next page boundary.
342 queue->ring_used_addr = (queue->ring_used_addr + 0xfff) & ~0xfff;
343 if (v3_gpa_to_hva(core, queue->ring_desc_addr, (addr_t *)&(queue->desc)) == -1) {
344 PrintError("Could not translate ring descriptor address\n");
348 if (v3_gpa_to_hva(core, queue->ring_avail_addr, (addr_t *)&(queue->avail)) == -1) {
349 PrintError("Could not translate ring available address\n");
353 if (v3_gpa_to_hva(core, queue->ring_used_addr, (addr_t *)&(queue->used)) == -1) {
354 PrintError("Could not translate ring used address\n");
358 PrintDebug("RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
359 (void *)(queue->ring_desc_addr),
360 (void *)(queue->ring_avail_addr),
361 (void *)(queue->ring_used_addr));
363 PrintDebug("RingDesc=%p, Avail=%p, Used=%p\n",
364 queue->desc, queue->avail, queue->used);
369 static int virtio_io_write(struct guest_info *core,
370 uint16_t port, void * src,
371 uint_t length, void * private_data)
373 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
374 int port_idx = port % virtio->io_range_size;
376 PrintDebug("VIRTIO NIC %p Write for port %d (index=%d) len=%d, value=%x\n", private_data,
377 port, port_idx, length, *(uint32_t *)src);
380 case GUEST_FEATURES_PORT:
382 PrintError("Illegal write length for guest features\n");
385 virtio->virtio_cfg.guest_features = *(uint32_t *)src;
388 case VRING_PG_NUM_PORT:
390 PrintError("Illegal write length for page frame number\n");
393 addr_t pfn = *(uint32_t *)src;
394 addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
395 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
398 virtio_setup_queue(core, virtio, &virtio->rx_vq, pfn, page_addr);
399 //disable_cb(&virtio->rx_vq);
402 virtio_setup_queue(core, virtio, &virtio->tx_vq, pfn, page_addr);
403 //disable_cb(&virtio->tx_vq);
406 virtio_setup_queue(core, virtio, &virtio->ctrl_vq, pfn, page_addr);
413 case VRING_Q_SEL_PORT:
414 virtio->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
415 if (virtio->virtio_cfg.vring_queue_selector > 2) {
416 PrintError("Virtio NIC: wrong queue idx: %d\n",
417 virtio->virtio_cfg.vring_queue_selector);
422 case VRING_Q_NOTIFY_PORT:
424 uint16_t queue_idx = *(uint16_t *)src;
426 handle_rx_kick(core, virtio);
427 } else if (queue_idx == 1){
428 if (handle_pkt_tx(core, virtio) == -1) {
429 PrintError("Could not handle NIC Notification\n");
432 } else if (queue_idx == 2){
433 if (handle_ctrl(core, virtio) == -1) {
434 PrintError("Could not handle NIC Notification\n");
438 PrintError("Wrong queue index %d\n", queue_idx);
443 case VIRTIO_STATUS_PORT:
444 virtio->virtio_cfg.status = *(uint8_t *)src;
445 if (virtio->virtio_cfg.status == 0) {
446 PrintDebug("Resetting device\n");
447 virtio_init_state(virtio);
451 case VIRTIO_ISR_PORT:
452 virtio->virtio_cfg.pci_isr = *(uint8_t *)src;
463 static int virtio_io_read(struct guest_info *core,
464 uint16_t port, void * dst,
465 uint_t length, void * private_data)
467 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
468 int port_idx = port % virtio->io_range_size;
469 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
471 PrintDebug("Virtio NIC %p: Read for port %d (index =%d), length=%d\n", private_data,
472 port, port_idx, length);
475 case HOST_FEATURES_PORT:
477 PrintError("Illegal read length for host features\n");
480 *(uint32_t *)dst = virtio->virtio_cfg.host_features;
483 case VRING_PG_NUM_PORT:
485 PrintError("Illegal read length for page frame number\n");
490 *(uint32_t *)dst = virtio->rx_vq.pfn;
493 *(uint32_t *)dst = virtio->tx_vq.pfn;
496 *(uint32_t *)dst = virtio->ctrl_vq.pfn;
503 case VRING_SIZE_PORT:
505 PrintError("Illegal read length for vring size\n");
510 *(uint16_t *)dst = virtio->rx_vq.queue_size;
513 *(uint16_t *)dst = virtio->tx_vq.queue_size;
516 *(uint16_t *)dst = virtio->ctrl_vq.queue_size;
523 case VIRTIO_STATUS_PORT:
525 PrintError("Illegal read length for status\n");
528 *(uint8_t *)dst = virtio->virtio_cfg.status;
531 case VIRTIO_ISR_PORT:
532 *(uint8_t *)dst = virtio->virtio_cfg.pci_isr;
533 virtio->virtio_cfg.pci_isr = 0;
534 v3_pci_lower_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
538 PrintError("Virtio NIC: Read of Unhandled Virtio Read:%d\n", port_idx);
546 static int virtio_rx(uint8_t * buf, uint32_t size, void * private_data) {
547 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
548 struct virtio_queue * q = &(virtio->rx_vq);
549 struct virtio_net_hdr_mrg_rxbuf hdr;
550 uint32_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
551 uint32_t data_len = size;
554 int ret_val = -ERR_VIRTIO_OTHER;
557 #ifndef CONFIG_DEBUG_VIRTIO_NET
559 PrintDebug("Virtio-NIC: virtio_rx: size: %d\n", size);
560 //v3_hexdump(buf, size, NULL, 0);
564 flags = v3_lock_irqsave(virtio->rx_lock);
571 memcpy(&hdr, buf, sizeof(struct virtio_net_hdr_mrg_rxbuf));
573 memset(&hdr, 0, sizeof(struct virtio_net_hdr_mrg_rxbuf));
575 if (q->ring_avail_addr == 0) {
576 PrintError("Queue is not set\n");
577 ret_val = -ERR_VIRTIO_RXQ_NOSET;
581 if (q->cur_avail_idx != q->avail->index){
583 uint16_t hdr_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
584 uint16_t buf_idx = 0;
585 struct vring_desc * hdr_desc = NULL;
587 hdr_desc = &(q->desc[hdr_idx]);
588 if (v3_gpa_to_hva(&(virtio->virtio_dev->vm->cores[0]), hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
589 PrintError("Could not translate receive buffer address\n");
593 memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr_mrg_rxbuf));
594 if (offset >= data_len) {
595 hdr_desc->flags &= ~VIRTIO_NEXT_FLAG;
598 struct vring_desc * buf_desc = NULL;
599 for (buf_idx = hdr_desc->next; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
601 buf_desc = &(q->desc[buf_idx]);
603 len = copy_data_to_desc(&(virtio->virtio_dev->vm->cores[0]), virtio, buf_desc, buf + offset, data_len - offset, 0);
605 if (offset < data_len) {
606 buf_desc->flags = VIRTIO_NEXT_FLAG;
608 buf_desc->length = len;
610 buf_desc->flags &= ~VIRTIO_NEXT_FLAG;
612 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
613 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) */
617 /* if there are certain num of pkts in the RX queue, notify guest
618 * so guest will exit to palacios
619 * when it returns, guest gets the virtio rx interrupt */
620 if((++virtio->buffed_rx > q->queue_size/5) &&
621 (q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
622 if(virtio->virtio_dev->vm->cores[0].cpu_id != V3_Get_CPU()){
623 notify_guest(virtio);
625 virtio->buffed_rx = 0;
629 /* RX queue is full, tell backend to stop RX on this device */
630 virtio->net_ops->stop_rx(virtio->backend_data);
631 enable_cb(&virtio->rx_vq);
633 ret_val = -ERR_VIRTIO_RXQ_FULL;
637 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
638 PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
639 v3_pci_raise_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
640 virtio->virtio_cfg.pci_isr = 0x1;
647 v3_unlock_irqrestore(virtio->rx_lock, flags);
652 static int virtio_free(struct virtio_net_state * virtio) {
654 // unregister from PCI
661 static struct v3_device_ops dev_ops = {
662 .free = (int (*)(void *))virtio_free,
666 /* TODO: Issue here: which vm info it needs? calling VM or the device's own VM? */
667 static void virtio_nic_poll(struct v3_vm_info * vm, void * data){
668 struct virtio_net_state * virtio = (struct virtio_net_state *)data;
670 handle_pkt_tx(&(vm->cores[0]), virtio);
673 static void virtio_start_tx(void * data){
674 struct virtio_net_state * virtio = (struct virtio_net_state *)data;
677 flags = v3_lock_irqsave(virtio->tx_lock);
678 virtio->tx_disabled = 0;
680 /* notify the device's guest to start sending pkt */
681 if(virtio->virtio_dev->vm->cores[0].cpu_id != V3_Get_CPU()){
682 notify_guest(virtio);
684 v3_unlock_irqrestore(virtio->tx_lock, flags);
687 static void virtio_stop_tx(void * data){
688 struct virtio_net_state * virtio = (struct virtio_net_state *)data;
691 flags = v3_lock_irqsave(virtio->tx_lock);
692 virtio->tx_disabled = 1;
694 /* stop the guest to exit to palacios for sending pkt? */
695 if(virtio->virtio_dev->vm->cores[0].cpu_id != V3_Get_CPU()){
696 disable_cb(&virtio->tx_vq);
699 v3_unlock_irqrestore(virtio->tx_lock, flags);
705 static int register_dev(struct virtio_dev_state * virtio,
706 struct virtio_net_state * net_state)
708 struct pci_device * pci_dev = NULL;
709 struct v3_pci_bar bars[6];
710 int num_ports = sizeof(struct virtio_config);
711 int tmp_ports = num_ports;
714 // This gets the number of ports, rounded up to a power of 2
715 net_state->io_range_size = 1; // must be a power of 2
716 while (tmp_ports > 0) {
718 net_state->io_range_size <<= 1;
721 // this is to account for any low order bits being set in num_ports
722 // if there are none, then num_ports was already a power of 2 so we shift right to reset it
723 if ((num_ports & ((net_state->io_range_size >> 1) - 1)) == 0) {
724 net_state->io_range_size >>= 1;
727 for (i = 0; i < 6; i++) {
728 bars[i].type = PCI_BAR_NONE;
731 PrintDebug("Virtio-NIC io_range_size = %d\n", net_state->io_range_size);
733 bars[0].type = PCI_BAR_IO;
734 bars[0].default_base_port = -1;
735 bars[0].num_ports = net_state->io_range_size;
736 bars[0].io_read = virtio_io_read;
737 bars[0].io_write = virtio_io_write;
738 bars[0].private_data = net_state;
740 pci_dev = v3_pci_register_device(virtio->pci_bus, PCI_STD_DEVICE,
741 0, 4/*PCI_AUTO_DEV_NUM*/, 0,
742 "LNX_VIRTIO_NIC", bars,
743 NULL, NULL, NULL, net_state);
746 PrintError("Virtio NIC: Could not register PCI Device\n");
750 PrintDebug("Virtio NIC: registered to PCI bus\n");
752 pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
753 pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
756 pci_dev->config_header.device_id = VIRTIO_NET_DEV_ID;
757 pci_dev->config_header.class = PCI_CLASS_NETWORK;
758 pci_dev->config_header.subclass = PCI_NET_SUBCLASS_OTHER;
759 pci_dev->config_header.subsystem_id = VIRTIO_NET_SUBDEVICE_ID;
760 pci_dev->config_header.intr_pin = 1;
761 pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
763 net_state->pci_dev = pci_dev;
764 net_state->virtio_dev = virtio;
766 uchar_t mac[6] = {0x11,0x11,0x11,0x11,0x11,0x11};
767 memcpy(net_state->net_cfg.mac, mac, 6);
769 memcpy(pci_dev->config_data, net_state->net_cfg.mac, ETH_ALEN);
771 virtio_init_state(net_state);
776 static int connect_fn(struct v3_vm_info * info,
777 void * frontend_data,
778 struct v3_dev_net_ops * ops,
780 void * private_data) {
781 struct virtio_dev_state * virtio = (struct virtio_dev_state *)frontend_data;
782 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
784 memset(net_state, 0, sizeof(struct virtio_net_state));
785 register_dev(virtio, net_state);
787 net_state->net_ops = ops;
788 net_state->backend_data = private_data;
789 net_state->virtio_dev = virtio;
792 ops->recv = virtio_rx;
793 ops->poll = virtio_nic_poll;
794 ops->start_tx = virtio_start_tx;
795 ops->stop_tx = virtio_stop_tx;
796 ops->frontend_data = net_state;
801 static int virtio_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
802 struct vm_device * pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
803 struct virtio_dev_state * virtio_state = NULL;
804 char * dev_id = v3_cfg_val(cfg, "ID");
806 PrintDebug("Virtio NIC: Initializing VIRTIO Network device: %s\n", dev_id);
808 if (pci_bus == NULL) {
809 PrintError("Virtio NIC: VirtIO devices require a PCI Bus");
813 virtio_state = (struct virtio_dev_state *)V3_Malloc(sizeof(struct virtio_dev_state));
814 memset(virtio_state, 0, sizeof(struct virtio_dev_state));
816 INIT_LIST_HEAD(&(virtio_state->dev_list));
817 virtio_state->pci_bus = pci_bus;
818 virtio_state->vm = vm;
820 struct vm_device * dev = v3_add_device(vm, dev_id, &dev_ops, virtio_state);
823 PrintError("Virtio NIC: Could not attach device %s\n", dev_id);
824 V3_Free(virtio_state);
828 if (v3_dev_add_net_frontend(vm, dev_id, connect_fn, (void *)virtio_state) == -1) {
829 PrintError("Virtio NIC: Could not register %s as net frontend\n", dev_id);
830 v3_remove_device(dev);
837 device_register("LNX_VIRTIO_NIC", virtio_init)