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) 2008, Jack Lange <jarusl@cs.northwestern.edu>
11 * Copyright (c) 2008, Lei Xia <lxia@northwestern.edu>
12 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
13 * All rights reserved.
15 * Author: Jack Lange <jarusl@cs.northwestern.edu>
16 * Lei Xia <lxia@northwestern.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>
29 #include <devices/pci.h>
32 #ifndef CONFIG_DEBUG_VIRTIO_NET
34 #define PrintDebug(fmt, args...)
37 /* The feature bitmap for virtio net */
38 #define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */
39 #define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */
40 #define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
41 #define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
42 #define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */
43 #define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */
44 #define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */
45 #define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */
46 #define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
47 #define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */
48 #define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */
49 #define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */
50 #define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
51 #define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */
52 #define VIRTIO_NET_F_CTRL_VQ 17 /* Control channel available */
53 #define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */
54 #define VIRTIO_NET_F_CTRL_VLAN 19 /* Control channel VLAN filtering */
55 #define VIRTIO_NET_F_CTRL_RX_EXTRA 20 /* Extra RX mode control support */
56 #define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
58 /* Maximum packet size we can receive from tap device: header + 64k */
59 #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
62 struct virtio_net_hdr {
65 #define VIRTIO_NET_HDR_GSO_NONE 0 /* Not a GSO frame */
68 uint16_t hdr_len; /* Ethernet + IP + tcp/udp hdrs */
69 uint16_t gso_size; /* Bytes to append to hdr_len per frame */
70 uint16_t csum_start; /* Position to start checksumming from */
71 uint16_t csum_offset; /* Offset after that to place checksum */
72 }__attribute__((packed));
77 #define QUEUE_SIZE 256
78 #define CTRL_QUEUE_SIZE 64
82 struct virtio_net_config
84 uint8_t mac[ETH_ALEN];
85 // See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above
87 } __attribute__((packed));
89 struct virtio_dev_state {
90 struct vm_device * pci_bus;
91 struct list_head dev_list;
92 struct guest_info * vm;
95 struct virtio_net_state {
96 struct virtio_net_config net_cfg;
97 struct virtio_config virtio_cfg;
99 //struct vm_device * pci_bus;
100 struct pci_device * pci_dev;
102 struct virtio_queue rx_vq; //index 0, rvq in Linux virtio driver, handle packet to guest
103 struct virtio_queue tx_vq; //index 1, svq in Linux virtio driver, handle packet from guest
104 struct virtio_queue ctrl_vq; //index 2, ctrol info from guest
106 struct v3_dev_net_ops * net_ops;
110 struct virtio_dev_state * virtio_dev;
112 struct list_head dev_link;
120 //Temporarly for debug
121 static void print_packet(uchar_t *pkt, int size) {
122 PrintDebug("Vnet: print_data_packet: size: %d\n", size);
123 v3_hexdump(pkt, size, NULL, 0);
125 static int send(uint8_t * buf, uint32_t count, void * private_data, struct vm_device *dest_dev)
128 PrintDebug("Virito NIC: In sending stub\n");
129 print_packet(buf, count);
134 static int receive(uint8_t * buf, uint32_t count, void * private_data, struct vm_device *src_dev)
136 PrintDebug("Virito NIC: In receiveing stub\n");
144 static int virtio_free(struct vm_device * dev)
150 static int virtio_reset(struct virtio_net_state * virtio)
152 virtio->rx_vq.ring_desc_addr = 0;
153 virtio->rx_vq.ring_avail_addr = 0;
154 virtio->rx_vq.ring_used_addr = 0;
155 virtio->rx_vq.pfn = 0;
156 virtio->rx_vq.cur_avail_idx = 0;
158 virtio->tx_vq.ring_desc_addr = 0;
159 virtio->tx_vq.ring_avail_addr = 0;
160 virtio->tx_vq.ring_used_addr = 0;
161 virtio->tx_vq.pfn = 0;
162 virtio->tx_vq.cur_avail_idx = 0;
164 virtio->ctrl_vq.ring_desc_addr = 0;
165 virtio->ctrl_vq.ring_avail_addr = 0;
166 virtio->ctrl_vq.ring_used_addr = 0;
167 virtio->ctrl_vq.pfn = 0;
168 virtio->ctrl_vq.cur_avail_idx = 0;
170 virtio->virtio_cfg.status = VIRTIO_NET_S_LINK_UP;
171 virtio->virtio_cfg.pci_isr = 0;
172 virtio->private_data = NULL;
178 //sending guest's packet to network sink
179 static int pkt_write(struct vm_device *dev, struct vring_desc *buf_desc)
181 struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
183 uint32_t len = buf_desc->length;
185 PrintDebug("Handling Virtio Net write\n");
187 if (guest_pa_to_host_va(dev->vm, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
188 PrintError("Could not translate buffer address\n");
192 PrintDebug("Length=%d\n", buf_desc->length);
194 if (virtio->net_ops->send(buf, len, virtio->private_data, NULL) == -1) {
202 static int build_receive_header(struct virtio_net_hdr *hdr, const void *buf, int raw)
207 memcpy(hdr, buf, sizeof(struct virtio_net_hdr));
209 memset(hdr, 0, sizeof(struct virtio_net_hdr));
216 //sending guest's packet to network sink
217 static int copy_data_to_desc(struct vm_device * dev, struct vring_desc *desc, uchar_t *buf, uint_t buf_len)
220 uint8_t *desc_buf = NULL;
222 if (guest_pa_to_host_va(dev->vm, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
223 PrintError("Could not translate buffer address\n");
227 len = (desc->length < buf_len)?desc->length:buf_len;
229 memcpy(desc_buf, buf, len);
231 PrintDebug("Length=%d\n", len);
238 static int send_pkt_to_guest(struct vm_device * dev, uchar_t *buf, uint_t size, int raw, void *private_data)
240 struct virtio_net_state *virtio = (struct virtio_net_state *)dev->private_data;
241 struct virtio_queue *q = &(virtio->rx_vq);
243 PrintDebug("VIRTIO Handle RX: cur_index=%d (mod=%d), avail_index=%d\n",
244 q->cur_avail_idx, q->cur_avail_idx % q->queue_size, q->avail->index);
246 struct virtio_net_hdr hdr;
247 uint32_t hdr_len = sizeof(struct virtio_net_hdr);
249 uint32_t data_len = size;
253 build_receive_header(&hdr, buf, 1);
255 //queue is not set yet
256 if (q->ring_avail_addr == 0)
259 \r uint32_t offset = 0;
260 if (q->cur_avail_idx < q->avail->index) {
261 struct vring_desc * hdr_desc = NULL;
263 uint16_t hdr_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
265 PrintDebug("Descriptor index=%d\n", q->cur_avail_idx % q->queue_size);
267 hdr_desc = &(q->desc[hdr_idx]);
269 PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
270 (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
272 if (guest_pa_to_host_va(dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
273 PrintError("Could not translate receive buffer address\n");
277 //copy header to the header descriptor
278 memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr));
280 uint16_t buf_idx = 0;
281 struct vring_desc * buf_desc = NULL;
282 //copy data to the next descriptors
283 for (buf_idx = 0; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
284 q->desc[buf_idx].flags = VIRTIO_NEXT_FLAG;
285 buf_desc = &(q->desc[buf_idx]);
286 uint32_t len = copy_data_to_desc(dev, buf_desc, buf+offset, data_len - offset);
288 buf_desc->length = len; // TODO: do we need this?
291 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
292 q->used->ring[q->used->index % q->queue_size].length = data_len; // What do we set this to????
298 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
299 PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
300 v3_pci_raise_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
301 virtio->virtio_cfg.pci_isr = 0x1;
308 int virtio_send(struct vm_device * dev, uchar_t *buf, uint_t size)
310 return send_pkt_to_guest(dev, buf, size, 1, NULL);
314 static int get_desc_count(struct virtio_queue * q, int index)
316 struct vring_desc * tmp_desc = &(q->desc[index]);
319 while (tmp_desc->flags & VIRTIO_NEXT_FLAG) {
320 tmp_desc = &(q->desc[tmp_desc->next]);
328 static int handle_ctrl(struct vm_device * dev)
335 //get packet from guest
336 static int handle_pkt_tx(struct vm_device * dev)
338 struct virtio_net_state *virtio = (struct virtio_net_state *)dev->private_data;
339 struct virtio_queue *q = &(virtio->tx_vq);
341 PrintDebug("VIRTIO NIC pkt_tx: cur_index=%d (mod=%d), avail_index=%d\n",
342 q->cur_avail_idx, q->cur_avail_idx % q->queue_size, q->avail->index);
344 struct virtio_net_hdr *hdr = NULL;
346 while (q->cur_avail_idx < q->avail->index) {
347 struct vring_desc * hdr_desc = NULL;
348 struct vring_desc * buf_desc = NULL;
351 uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
352 int desc_cnt = get_desc_count(q, desc_idx);
353 uint32_t req_len = 0;
355 PrintDebug("Descriptor Count=%d, index=%d\n", desc_cnt, q->cur_avail_idx % q->queue_size);
357 hdr_desc = &(q->desc[desc_idx]);
359 PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
360 (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
362 if (guest_pa_to_host_va(dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
363 PrintError("Could not translate block header address\n");
367 //memcpy(&hdr, (void *)hdr_addr, sizeof(struct virtio_net_hdr));
368 hdr = (struct virtio_net_hdr*)hdr_addr;
370 PrintDebug("NIC Op Hdr (ptr=%p) header len =%x\n", (void *)hdr_addr, (int)hdr->hdr_len);
372 desc_idx= hdr_desc->next;
374 for (i = 0; i < desc_cnt - 1; i++) {
375 buf_desc = &(q->desc[desc_idx]);
377 PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", buf_desc,
378 (void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next);
380 if (pkt_write(dev, buf_desc) == -1) {
381 PrintError("Error handling nic operation\n");
385 req_len += buf_desc->length;
386 desc_idx = buf_desc->next;
389 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
390 q->used->ring[q->used->index % q->queue_size].length = req_len; // What do we set this to????
396 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
397 PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
398 v3_pci_raise_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
399 virtio->virtio_cfg.pci_isr = 0x1;
406 static int virtio_setup_queue(struct vm_device * dev, struct virtio_queue *queue, addr_t pfn, addr_t page_addr)
410 queue->ring_desc_addr = page_addr ;
411 queue->ring_avail_addr = page_addr + (queue->queue_size* sizeof(struct vring_desc));
412 queue->ring_used_addr = (queue->ring_avail_addr + \
413 sizeof(struct vring_avail) + \
414 (queue->queue_size * sizeof(uint16_t)));
416 // round up to next page boundary.
417 queue->ring_used_addr = (queue->ring_used_addr + 0xfff) & ~0xfff;
419 if (guest_pa_to_host_va(dev->vm, queue->ring_desc_addr, (addr_t *)&(queue->desc)) == -1) {
420 PrintError("Could not translate ring descriptor address\n");
425 if (guest_pa_to_host_va(dev->vm, queue->ring_avail_addr, (addr_t *)&(queue->avail)) == -1) {
426 PrintError("Could not translate ring available address\n");
431 if (guest_pa_to_host_va(dev->vm, queue->ring_used_addr, (addr_t *)&(queue->used)) == -1) {
432 PrintError("Could not translate ring used address\n");
436 PrintDebug("RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
437 (void *)(queue->ring_desc_addr),
438 (void *)(queue->ring_avail_addr),
439 (void *)(queue->ring_used_addr));
441 PrintDebug("RingDesc=%p, Avail=%p, Used=%p\n",
442 queue->desc, queue->avail, queue->used);
449 static int virtio_io_write(uint16_t port, void * src, uint_t length, void * private_data)
451 struct vm_device * dev = (struct vm_device *)private_data;
452 struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
453 int port_idx = port % virtio->io_range_size;
456 PrintDebug("VIRTIO NIC Write for port %d (index=%d) len=%d, value=%x\n",
457 port, port_idx, length, *(uint32_t *)src);
461 case GUEST_FEATURES_PORT:
463 PrintError("Illegal write length for guest features\n");
467 virtio->virtio_cfg.guest_features = *(uint32_t *)src;
468 PrintDebug("Setting Guest Features to %x\n", virtio->virtio_cfg.guest_features);
471 case VRING_PG_NUM_PORT:
473 addr_t pfn = *(uint32_t *)src;
474 addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
476 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
479 virtio_setup_queue(dev, &virtio->rx_vq, pfn, page_addr);
482 virtio_setup_queue(dev, &virtio->tx_vq, pfn, page_addr);
485 virtio_setup_queue(dev, &virtio->ctrl_vq, pfn, page_addr);
492 PrintError("Illegal write length for page frame number\n");
496 case VRING_Q_SEL_PORT:
497 virtio->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
499 if (virtio->virtio_cfg.vring_queue_selector > 2) {
500 PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
501 virtio->virtio_cfg.vring_queue_selector);
506 case VRING_Q_NOTIFY_PORT:
507 PrintDebug("Handling Kick\n");
508 uint16_t queue_idx = *(uint16_t *)src;
510 PrintError("receive queue notification\n");
511 }else if (queue_idx == 1){
512 if (handle_pkt_tx(dev) == -1) {
513 PrintError("Could not handle NIC Notification\n");
516 }else if (queue_idx == 2){
517 if (handle_ctrl(dev) == -1) {
518 PrintError("Could not handle NIC Notification\n");
522 PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
527 case VIRTIO_STATUS_PORT:
528 virtio->virtio_cfg.status = *(uint8_t *)src;
530 if (virtio->virtio_cfg.status == 0) {
531 PrintDebug("Resetting device\n");
532 virtio_reset(virtio);
537 case VIRTIO_ISR_PORT:
538 virtio->virtio_cfg.pci_isr = *(uint8_t *)src;
549 static int virtio_io_read(uint16_t port, void * dst, uint_t length, void * private_data)
551 struct vm_device * dev = (struct vm_device *)private_data;
552 struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
553 int port_idx = port % virtio->io_range_size;
554 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
557 PrintDebug("VIRTIO NIC Read for port %d (index =%d), length=%d\n",
558 port, port_idx, length);
561 case HOST_FEATURES_PORT:
563 PrintError("Illegal read length for host features\n");
567 *(uint32_t *)dst = virtio->virtio_cfg.host_features;
570 case VRING_PG_NUM_PORT:
573 PrintError("Illegal read length for page frame number\n");
579 *(uint32_t *)dst = virtio->rx_vq.pfn;
582 *(uint32_t *)dst = virtio->tx_vq.pfn;
585 *(uint32_t *)dst = virtio->ctrl_vq.pfn;
592 case VRING_SIZE_PORT:
594 PrintError("Illegal read length for vring size\n");
600 *(uint16_t *)dst = virtio->rx_vq.queue_size;
603 *(uint32_t *)dst = virtio->tx_vq.queue_size;
606 *(uint32_t *)dst = virtio->ctrl_vq.queue_size;
613 case VIRTIO_STATUS_PORT:
615 PrintError("Illegal read length for status\n");
619 *(uint8_t *)dst = virtio->virtio_cfg.status;
622 case VIRTIO_ISR_PORT:
623 *(uint8_t *)dst = virtio->virtio_cfg.pci_isr;
624 virtio->virtio_cfg.pci_isr = 0;
625 v3_pci_lower_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
629 PrintError("Read of Unhandled Virtio Read\n");
637 static struct v3_device_ops dev_ops = {
645 static int register_dev(struct virtio_dev_state * virtio, struct virtio_net_state * net_state)
647 struct pci_device * pci_dev = NULL;
648 struct v3_pci_bar bars[6];
649 int num_ports = sizeof(struct virtio_config);
650 int tmp_ports = num_ports;
653 // This gets the number of ports, rounded up to a power of 2
654 net_state->io_range_size = 1; // must be a power of 2
656 while (tmp_ports > 0) {
658 net_state->io_range_size <<= 1;
661 // this is to account for any low order bits being set in num_ports
662 // if there are none, then num_ports was already a power of 2 so we shift right to reset it
663 if ((num_ports & ((net_state->io_range_size >> 1) - 1)) == 0) {
664 net_state->io_range_size >>= 1;
668 for (i = 0; i < 6; i++) {
669 bars[i].type = PCI_BAR_NONE;
672 PrintDebug("Virtio-NIC io_range_size = %d\n", net_state->io_range_size);
674 bars[0].type = PCI_BAR_IO;
675 bars[0].default_base_port = -1;
676 bars[0].num_ports = net_state->io_range_size;
678 bars[0].io_read = virtio_io_read;
679 bars[0].io_write = virtio_io_write;
680 bars[0].private_data = net_state;
682 pci_dev = v3_pci_register_device(virtio->pci_bus, PCI_STD_DEVICE,
683 0, PCI_AUTO_DEV_NUM, 0,
684 "LNX_VIRTIO_NIC", bars,
685 NULL, NULL, NULL, net_state);
688 PrintError("Could not register PCI Device\n");
692 PrintDebug("Virtio-NIC registered to PCI bus\n");
694 pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
695 pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
698 pci_dev->config_header.device_id = VIRTIO_NET_DEV_ID;
699 pci_dev->config_header.class = PCI_CLASS_NETWORK;
700 pci_dev->config_header.subclass = PCI_NET_SUBCLASS_OTHER;
702 //TODO:how to define new one for virtio net device
703 pci_dev->config_header.subsystem_id = VIRTIO_BLOCK_SUBDEVICE_ID;
705 pci_dev->config_header.intr_pin = 1;
707 pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
710 net_state->pci_dev = pci_dev;
711 //net_state->pci_bus = pci_bus;
713 net_state->virtio_cfg.host_features = 0; //no features support now
715 net_state->rx_vq.queue_size = QUEUE_SIZE;
716 net_state->tx_vq.queue_size = QUEUE_SIZE;
717 net_state->ctrl_vq.queue_size = CTRL_QUEUE_SIZE;
719 net_state->virtio_dev = virtio;
721 virtio_reset(net_state);
728 static int connect_fn(struct guest_info * info,
729 void * frontend_data,
730 struct v3_dev_net_ops * ops,
734 struct virtio_dev_state * virtio = (struct virtio_dev_state *)frontend_data;
736 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
737 memset(net_state, 0, sizeof(struct virtio_net_state));
739 register_dev(virtio, net_state);
741 net_state->net_ops = ops;
742 net_state->backend_data = private_data;
748 struct net_frontend {
749 int (*connect)(struct guest_info * info,
750 void * frontend_data,
751 struct v3_dev_net_ops * ops,
756 struct list_head net_node;
762 int v3_dev_add_net_frontend(struct guest_info * info,
764 int (*connect)(struct guest_info * info,
765 void * frontend_data,
766 struct v3_dev_net_ops * ops,
768 void * private_data),
771 struct net_frontend * frontend = NULL;
773 frontend = (struct net_frontend *)V3_Malloc(sizeof(struct net_frontend));
774 memset(frontend, 0, sizeof(struct net_frontend));
776 frontend->connect = connect;
777 frontend->priv_data = priv_data;
779 list_add(&(frontend->net_node), &(info->dev_mgr.net_list));
780 v3_htable_insert(info->dev_mgr.net_table, (addr_t)(name), (addr_t)frontend);
786 int v3_dev_connect_net(struct guest_info * info,
787 char * frontend_name,
788 struct v3_dev_net_ops * ops,
792 struct net_frontend * frontend = NULL;
794 frontend = (struct net_frontend *)v3_htable_search(info->dev_mgr.net_table,
795 (addr_t)frontend_name);
797 if (frontend == NULL) {
798 PrintError("Could not find frontend net device %s\n", frontend_name);
802 if (frontend->connect(info, frontend->priv_data, ops, cfg, private_data) == -1) {
803 PrintError("Error connecting to net frontend %s\n", frontend_name);
810 static int virtio_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
811 struct vm_device * pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
812 struct virtio_dev_state * virtio_state = NULL;
813 char * name = v3_cfg_val(cfg, "name");
815 PrintDebug("Initializing VIRTIO Network device\n");
817 if (pci_bus == NULL) {
818 PrintError("VirtIO devices require a PCI Bus");
822 virtio_state = (struct virtio_dev_state *)V3_Malloc(sizeof(struct virtio_dev_state));
823 memset(virtio_state, 0, sizeof(struct virtio_dev_state));
825 INIT_LIST_HEAD(&(virtio_state->dev_list));
826 virtio_state->pci_bus = pci_bus;
827 virtio_state->vm = vm;
829 struct vm_device * dev = v3_allocate_device(name, &dev_ops, virtio_state);
830 if (v3_attach_device(vm, dev) == -1) {
831 PrintError("Could not attach device %s\n", name);
835 if (v3_dev_add_net_frontend(vm, name, connect_fn, (void *)virtio_state) == -1) {
836 PrintError("Could not register %s as net frontend\n", name);
841 //for temporary testing, add a backend
844 struct v3_dev_net_ops ops;
846 ops.receive = receive;
848 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
849 memset(net_state, 0, sizeof(struct virtio_net_state));
851 register_dev(virtio_state, net_state);
853 net_state->net_ops = &ops;
860 device_register("LNX_VIRTIO_NIC", virtio_init)