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);
126 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.host_features = 0;
171 //virtio->virtio_cfg.status = VIRTIO_NET_S_LINK_UP;
172 virtio->virtio_cfg.pci_isr = 0;
173 virtio->private_data = NULL;
179 //sending guest's packet to network sink
180 static int pkt_write(struct virtio_net_state * virtio, struct vring_desc * buf_desc)
182 //struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
183 uint8_t * buf = NULL;
184 uint32_t len = buf_desc->length;
186 PrintDebug("Handling Virtio Net write\n");
188 if (guest_pa_to_host_va(virtio->virtio_dev->vm, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
189 PrintError("Could not translate buffer address\n");
193 PrintDebug("Length=%d\n", buf_desc->length);
194 PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d, buf address: %p, send address: %p\n", buf_desc,
195 (void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next, buf, virtio->net_ops->send);
197 if (virtio->net_ops->send(buf, len, (void *)virtio, NULL) == -1) {
205 static int build_receive_header(struct virtio_net_hdr * hdr, const void * buf, int raw) {
209 memcpy(hdr, buf, sizeof(struct virtio_net_hdr));
211 memset(hdr, 0, sizeof(struct virtio_net_hdr));
218 //sending guest's packet to network sink
219 static int copy_data_to_desc(struct virtio_net_state * virtio_state, struct vring_desc * desc, uchar_t * buf, uint_t buf_len)
222 uint8_t * desc_buf = NULL;
224 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
225 PrintError("Could not translate buffer address\n");
229 len = (desc->length < buf_len)?desc->length:buf_len;
231 memcpy(desc_buf, buf, len);
233 PrintDebug("Length=%d\n", len);
240 static int send_pkt_to_guest(struct vm_device * dev, uchar_t * buf, uint_t size, int raw, void * private_data)
242 // TODO: This should not be like this
243 struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
244 struct virtio_queue * q = &(virtio->rx_vq);
245 struct virtio_net_hdr hdr;
246 uint32_t hdr_len = sizeof(struct virtio_net_hdr);
247 uint32_t data_len = size;
250 PrintDebug("VIRTIO Handle RX: cur_index=%d (mod=%d), avail_index=%d\n",
251 q->cur_avail_idx, q->cur_avail_idx % q->queue_size, q->avail->index);
259 build_receive_header(&hdr, buf, 1);
261 //queue is not set yet
262 if (q->ring_avail_addr == 0) {
263 PrintError("Queue is not set\n");
268 if (q->cur_avail_idx < q->avail->index) {
270 uint16_t hdr_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
271 uint16_t buf_idx = 0;
272 struct vring_desc * hdr_desc = NULL;
274 PrintDebug("Descriptor index=%d\n", q->cur_avail_idx % q->queue_size);
276 hdr_desc = &(q->desc[hdr_idx]);
278 PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
279 (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
281 if (guest_pa_to_host_va(virtio->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
282 PrintError("Could not translate receive buffer address\n");
286 //copy header to the header descriptor
287 memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr));
289 //copy data to the next descriptors
290 for (buf_idx = 0; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
291 struct vring_desc * buf_desc = &(q->desc[buf_idx]);
294 buf_desc->flags = VIRTIO_NEXT_FLAG;
296 len = copy_data_to_desc(virtio, buf_desc, buf + offset, data_len - offset);
299 buf_desc->length = len; // TODO: do we need this?
302 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
303 q->used->ring[q->used->index % q->queue_size].length = data_len; // What do we set this to????
309 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
310 PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
311 v3_pci_raise_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
312 virtio->virtio_cfg.pci_isr = 0x1;
319 int virtio_send(struct vm_device * dev, uchar_t * buf, uint_t size) {
320 return send_pkt_to_guest(dev, buf, size, 1, NULL);
324 static int get_desc_count(struct virtio_queue * q, int index) {
325 struct vring_desc * tmp_desc = &(q->desc[index]);
328 while (tmp_desc->flags & VIRTIO_NEXT_FLAG) {
329 tmp_desc = &(q->desc[tmp_desc->next]);
337 static int handle_ctrl(struct virtio_net_state * dev) {
341 //get packet from guest
342 static int handle_pkt_tx(struct virtio_net_state * virtio_state)
344 //struct virtio_net_state *virtio = (struct virtio_net_state *)dev->private_data;
345 struct virtio_queue * q = &(virtio_state->tx_vq);
347 PrintDebug("VIRTIO NIC pkt_tx: cur_index=%d (mod=%d), avail_index=%d\n",
348 q->cur_avail_idx, q->cur_avail_idx % q->queue_size, q->avail->index);
350 struct virtio_net_hdr * hdr = NULL;
352 while (q->cur_avail_idx < q->avail->index) {
353 struct vring_desc * hdr_desc = NULL;
355 uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
356 int desc_cnt = get_desc_count(q, desc_idx);
357 uint32_t req_len = 0;
360 PrintDebug("Descriptor Count=%d, index=%d\n", desc_cnt, q->cur_avail_idx % q->queue_size);
362 hdr_desc = &(q->desc[desc_idx]);
364 PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
365 (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
367 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
368 PrintError("Could not translate block header address\n");
372 //memcpy(&hdr, (void *)hdr_addr, sizeof(struct virtio_net_hdr));
373 hdr = (struct virtio_net_hdr*)hdr_addr;
375 PrintDebug("NIC Op Hdr (ptr=%p) header len =%x\n", (void *)hdr_addr, (int)hdr->hdr_len);
377 desc_idx = hdr_desc->next;
379 for (i = 0; i < desc_cnt - 1; i++) {
380 struct vring_desc * buf_desc = &(q->desc[desc_idx]);
382 PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", buf_desc,
383 (void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next);
385 if (pkt_write(virtio_state, buf_desc) == -1) {
386 PrintError("Error handling nic operation\n");
390 req_len += buf_desc->length;
391 desc_idx = buf_desc->next;
394 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
395 q->used->ring[q->used->index % q->queue_size].length = req_len; // What do we set this to????
401 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
402 PrintDebug("Raising IRQ %d\n", virtio_state->pci_dev->config_header.intr_line);
403 v3_pci_raise_irq(virtio_state->virtio_dev->pci_bus, 0, virtio_state->pci_dev);
404 virtio_state->virtio_cfg.pci_isr = 0x1;
411 static int virtio_setup_queue(struct virtio_net_state * virtio_state, struct virtio_queue * queue, addr_t pfn, addr_t page_addr) {
414 queue->ring_desc_addr = page_addr;
415 queue->ring_avail_addr = page_addr + (queue->queue_size * sizeof(struct vring_desc));
416 queue->ring_used_addr = ((queue->ring_avail_addr) +
417 (sizeof(struct vring_avail)) +
418 (queue->queue_size * sizeof(uint16_t)));
420 // round up to next page boundary.
421 queue->ring_used_addr = (queue->ring_used_addr + 0xfff) & ~0xfff;
423 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_desc_addr, (addr_t *)&(queue->desc)) == -1) {
424 PrintError("Could not translate ring descriptor address\n");
429 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_avail_addr, (addr_t *)&(queue->avail)) == -1) {
430 PrintError("Could not translate ring available address\n");
435 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_used_addr, (addr_t *)&(queue->used)) == -1) {
436 PrintError("Could not translate ring used address\n");
440 PrintDebug("RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
441 (void *)(queue->ring_desc_addr),
442 (void *)(queue->ring_avail_addr),
443 (void *)(queue->ring_used_addr));
445 PrintDebug("RingDesc=%p, Avail=%p, Used=%p\n",
446 queue->desc, queue->avail, queue->used);
453 static int virtio_io_write(uint16_t port, void * src, uint_t length, void * private_data)
455 //struct vm_device * dev = (struct vm_device *)private_data;
456 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
457 int port_idx = port % virtio->io_range_size;
460 PrintDebug("VIRTIO NIC Write for port %d (index=%d) len=%d, value=%x\n",
461 port, port_idx, length, *(uint32_t *)src);
465 case GUEST_FEATURES_PORT:
467 PrintError("Illegal write length for guest features\n");
471 virtio->virtio_cfg.guest_features = *(uint32_t *)src;
472 PrintDebug("Setting Guest Features to %x\n", virtio->virtio_cfg.guest_features);
475 case VRING_PG_NUM_PORT:
478 PrintError("Illegal write length for page frame number\n");
482 addr_t pfn = *(uint32_t *)src;
483 addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
484 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
488 virtio_setup_queue(virtio, &virtio->rx_vq, pfn, page_addr);
491 virtio_setup_queue(virtio, &virtio->tx_vq, pfn, page_addr);
494 virtio_setup_queue(virtio, &virtio->ctrl_vq, pfn, page_addr);
502 case VRING_Q_SEL_PORT:
503 virtio->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
505 if (virtio->virtio_cfg.vring_queue_selector > 2) {
506 PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
507 virtio->virtio_cfg.vring_queue_selector);
512 case VRING_Q_NOTIFY_PORT:
514 uint16_t queue_idx = *(uint16_t *)src;
516 PrintDebug("Handling Kick\n");
519 PrintError("receive queue notification\n");
520 } else if (queue_idx == 1){
521 if (handle_pkt_tx(virtio) == -1) {
522 PrintError("Could not handle NIC Notification\n");
525 } else if (queue_idx == 2){
526 if (handle_ctrl(virtio) == -1) {
527 PrintError("Could not handle NIC Notification\n");
531 PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
537 case VIRTIO_STATUS_PORT:
538 virtio->virtio_cfg.status = *(uint8_t *)src;
540 if (virtio->virtio_cfg.status == 0) {
541 PrintDebug("Resetting device\n");
542 virtio_reset(virtio);
547 case VIRTIO_ISR_PORT:
548 virtio->virtio_cfg.pci_isr = *(uint8_t *)src;
559 static int virtio_io_read(uint16_t port, void * dst, uint_t length, void * private_data)
561 //struct vm_device * dev = (struct vm_device *)private_data;
562 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
563 int port_idx = port % virtio->io_range_size;
564 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
566 PrintDebug("VIRTIO NIC Read for port %d (index =%d), length=%d",
567 port, port_idx, length);
570 case HOST_FEATURES_PORT:
572 PrintError("Illegal read length for host features\n");
576 *(uint32_t *)dst = virtio->virtio_cfg.host_features;
578 PrintDebug("value=0x%x\n", *(uint32_t *)dst);
581 case VRING_PG_NUM_PORT:
584 PrintError("Illegal read length for page frame number\n");
590 *(uint32_t *)dst = virtio->rx_vq.pfn;
593 *(uint32_t *)dst = virtio->tx_vq.pfn;
596 *(uint32_t *)dst = virtio->ctrl_vq.pfn;
602 PrintDebug(", value=0x%x\n", *(uint32_t *)dst);
605 case VRING_SIZE_PORT:
608 PrintError("Illegal read length for vring size\n");
614 *(uint16_t *)dst = virtio->rx_vq.queue_size;
617 *(uint16_t *)dst = virtio->tx_vq.queue_size;
620 *(uint16_t *)dst = virtio->ctrl_vq.queue_size;
626 PrintDebug("queue index: %d, value=0x%x\n", (int)queue_idx, *(uint16_t *)dst);
629 case VIRTIO_STATUS_PORT:
632 PrintError("Illegal read length for status\n");
636 *(uint8_t *)dst = virtio->virtio_cfg.status;
638 PrintDebug(", value=0x%x\n", *(uint8_t *)dst);
641 case VIRTIO_ISR_PORT:
642 *(uint8_t *)dst = virtio->virtio_cfg.pci_isr;
643 virtio->virtio_cfg.pci_isr = 0;
644 v3_pci_lower_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
646 PrintDebug(", value=0x%x\n", *(uint8_t *)dst);
651 PrintError("Read of Unhandled Virtio Read\n");
659 static struct v3_device_ops dev_ops = {
667 static int register_dev(struct virtio_dev_state * virtio, struct virtio_net_state * net_state)
669 struct pci_device * pci_dev = NULL;
670 struct v3_pci_bar bars[6];
671 int num_ports = sizeof(struct virtio_config);
672 int tmp_ports = num_ports;
675 // This gets the number of ports, rounded up to a power of 2
676 net_state->io_range_size = 1; // must be a power of 2
678 while (tmp_ports > 0) {
680 net_state->io_range_size <<= 1;
683 // this is to account for any low order bits being set in num_ports
684 // if there are none, then num_ports was already a power of 2 so we shift right to reset it
685 if ((num_ports & ((net_state->io_range_size >> 1) - 1)) == 0) {
686 net_state->io_range_size >>= 1;
690 for (i = 0; i < 6; i++) {
691 bars[i].type = PCI_BAR_NONE;
694 PrintDebug("Virtio-NIC io_range_size = %d\n", net_state->io_range_size);
696 bars[0].type = PCI_BAR_IO;
697 bars[0].default_base_port = -1;
698 bars[0].num_ports = net_state->io_range_size;
700 bars[0].io_read = virtio_io_read;
701 bars[0].io_write = virtio_io_write;
702 bars[0].private_data = net_state;
704 pci_dev = v3_pci_register_device(virtio->pci_bus, PCI_STD_DEVICE,
705 0, PCI_AUTO_DEV_NUM, 0,
706 "LNX_VIRTIO_NIC", bars,
707 NULL, NULL, NULL, net_state);
710 PrintError("Could not register PCI Device\n");
714 PrintDebug("Virtio-NIC registered to PCI bus\n");
716 pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
717 pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
720 pci_dev->config_header.device_id = VIRTIO_NET_DEV_ID;
721 pci_dev->config_header.class = PCI_CLASS_NETWORK;
722 pci_dev->config_header.subclass = PCI_NET_SUBCLASS_OTHER;
724 pci_dev->config_header.subsystem_id = VIRTIO_NET_SUBDEVICE_ID;;
726 pci_dev->config_header.intr_pin = 1;
728 pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
731 net_state->pci_dev = pci_dev;
732 //net_state->pci_bus = pci_bus;
734 net_state->virtio_cfg.host_features = 0; //no features support now
736 net_state->rx_vq.queue_size = QUEUE_SIZE;
737 net_state->tx_vq.queue_size = QUEUE_SIZE;
738 net_state->ctrl_vq.queue_size = CTRL_QUEUE_SIZE;
740 net_state->virtio_dev = virtio;
742 virtio_reset(net_state);
749 static int connect_fn(struct guest_info * info,
750 void * frontend_data,
751 struct v3_dev_net_ops * ops,
753 void * private_data) {
754 struct virtio_dev_state * virtio = (struct virtio_dev_state *)frontend_data;
755 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
757 memset(net_state, 0, sizeof(struct virtio_net_state));
759 register_dev(virtio, net_state);
761 net_state->net_ops = ops;
762 net_state->backend_data = private_data;
768 static int virtio_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
769 struct vm_device * pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
770 struct virtio_dev_state * virtio_state = NULL;
771 char * name = v3_cfg_val(cfg, "name");
773 PrintDebug("Initializing VIRTIO Network device\n");
775 if (pci_bus == NULL) {
776 PrintError("VirtIO devices require a PCI Bus");
780 virtio_state = (struct virtio_dev_state *)V3_Malloc(sizeof(struct virtio_dev_state));
781 memset(virtio_state, 0, sizeof(struct virtio_dev_state));
783 INIT_LIST_HEAD(&(virtio_state->dev_list));
784 virtio_state->pci_bus = pci_bus;
785 virtio_state->vm = vm;
787 struct vm_device * dev = v3_allocate_device(name, &dev_ops, virtio_state);
788 if (v3_attach_device(vm, dev) == -1) {
789 PrintError("Could not attach device %s\n", name);
793 if (v3_dev_add_net_frontend(vm, name, connect_fn, (void *)virtio_state) == -1) {
794 PrintError("Could not register %s as net frontend\n", name);
799 //for temporary testing, add a backend
802 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
803 memset(net_state, 0, sizeof(struct virtio_net_state));
805 net_state->net_ops = (struct v3_dev_net_ops *)V3_Malloc(sizeof(struct v3_dev_net_ops));
807 net_state->net_ops->send = &send;
808 net_state->net_ops->receive = &receive;
810 register_dev(virtio_state, net_state);
812 PrintDebug("Virtio NIC After register Device: queue size: %d, %d\n",
813 net_state->rx_vq.queue_size, net_state->tx_vq.queue_size);
821 device_register("LNX_VIRTIO_NIC", virtio_init)