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))
61 struct virtio_net_hdr {
64 #define VIRTIO_NET_HDR_GSO_NONE 0 /* Not a GSO frame */
67 uint16_t hdr_len; /* Ethernet + IP + tcp/udp hdrs */
68 uint16_t gso_size; /* Bytes to append to hdr_len per frame */
69 uint16_t csum_start; /* Position to start checksumming from */
70 uint16_t csum_offset; /* Offset after that to place checksum */
71 }__attribute__((packed));
74 #define QUEUE_SIZE 256
75 #define CTRL_QUEUE_SIZE 64
78 struct virtio_net_config
80 uint8_t mac[ETH_ALEN]; //VIRTIO_NET_F_MAC
82 } __attribute__((packed));
84 struct virtio_dev_state {
85 struct vm_device * pci_bus;
86 struct list_head dev_list;
87 struct guest_info * vm;
90 struct virtio_net_state {
91 struct virtio_net_config net_cfg;
92 struct virtio_config virtio_cfg;
94 struct pci_device * pci_dev;
97 struct virtio_queue rx_vq; //index 0, rvq in Linux virtio driver, handle packet to guest
98 struct virtio_queue tx_vq; //index 1, svq in Linux virtio driver, handle packet from guest
99 struct virtio_queue ctrl_vq; //index 2, ctrol info from guest
101 struct v3_dev_net_ops * net_ops;
104 struct virtio_dev_state * virtio_dev;
105 struct list_head dev_link;
109 //Temporarly for debug
110 static void print_packet(uchar_t *pkt, int size) {
111 PrintDebug("Vnet: print_data_packet: size: %d\n", size);
112 v3_hexdump(pkt, size, NULL, 0);
115 static int send(uint8_t * buf, uint32_t count, void * private_data, struct vm_device *dest_dev)
117 PrintDebug("Virito NIC: In sending stub\n");
118 print_packet(buf, count);
123 static int receive(uint8_t * buf, uint32_t count, void * private_data, struct vm_device *src_dev)
125 PrintDebug("Virito NIC: In receiveing stub\n");
131 static int virtio_free(struct vm_device * dev)
137 static int virtio_reset(struct virtio_net_state * virtio)
139 virtio->rx_vq.ring_desc_addr = 0;
140 virtio->rx_vq.ring_avail_addr = 0;
141 virtio->rx_vq.ring_used_addr = 0;
142 virtio->rx_vq.pfn = 0;
143 virtio->rx_vq.cur_avail_idx = 0;
145 virtio->tx_vq.ring_desc_addr = 0;
146 virtio->tx_vq.ring_avail_addr = 0;
147 virtio->tx_vq.ring_used_addr = 0;
148 virtio->tx_vq.pfn = 0;
149 virtio->tx_vq.cur_avail_idx = 0;
151 virtio->ctrl_vq.ring_desc_addr = 0;
152 virtio->ctrl_vq.ring_avail_addr = 0;
153 virtio->ctrl_vq.ring_used_addr = 0;
154 virtio->ctrl_vq.pfn = 0;
155 virtio->ctrl_vq.cur_avail_idx = 0;
157 virtio->virtio_cfg.host_features = 0;
158 //virtio->virtio_cfg.status = VIRTIO_NET_S_LINK_UP;
159 virtio->virtio_cfg.pci_isr = 0;
160 virtio->private_data = NULL;
166 //sending guest's packet to network sink
167 static int pkt_write(struct virtio_net_state * virtio, struct vring_desc * buf_desc)
169 //struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
170 uint8_t * buf = NULL;
171 uint32_t len = buf_desc->length;
173 PrintDebug("Handling Virtio Net write\n");
175 if (guest_pa_to_host_va(virtio->virtio_dev->vm, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
176 PrintError("Could not translate buffer address\n");
180 PrintDebug("Length=%d\n", buf_desc->length);
181 PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d, buf address: %p, send address: %p\n", buf_desc,
182 (void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next, buf, virtio->net_ops->send);
184 if (virtio->net_ops->send(buf, len, (void *)virtio, NULL) == -1) {
192 static int build_receive_header(struct virtio_net_hdr * hdr, const void * buf, int raw) {
196 memcpy(hdr, buf, sizeof(struct virtio_net_hdr));
198 memset(hdr, 0, sizeof(struct virtio_net_hdr));
205 //sending guest's packet to network sink
206 static int copy_data_to_desc(struct virtio_net_state * virtio_state, struct vring_desc * desc, uchar_t * buf, uint_t buf_len)
209 uint8_t * desc_buf = NULL;
211 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
212 PrintError("Could not translate buffer address\n");
216 len = (desc->length < buf_len)?desc->length:buf_len;
218 memcpy(desc_buf, buf, len);
220 PrintDebug("Length=%d\n", len);
227 static int send_pkt_to_guest(struct vm_device * dev, uchar_t * buf, uint_t size, int raw, void * private_data)
229 // TODO: This should not be like this
230 struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
231 struct virtio_queue * q = &(virtio->rx_vq);
232 struct virtio_net_hdr hdr;
233 uint32_t hdr_len = sizeof(struct virtio_net_hdr);
234 uint32_t data_len = size;
237 PrintDebug("VIRTIO Handle RX: cur_index=%d (mod=%d), avail_index=%d\n",
238 q->cur_avail_idx, q->cur_avail_idx % q->queue_size, q->avail->index);
246 build_receive_header(&hdr, buf, 1);
248 //queue is not set yet
249 if (q->ring_avail_addr == 0) {
250 PrintError("Queue is not set\n");
255 if (q->cur_avail_idx < q->avail->index) {
257 uint16_t hdr_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
258 uint16_t buf_idx = 0;
259 struct vring_desc * hdr_desc = NULL;
261 PrintDebug("Descriptor index=%d\n", q->cur_avail_idx % q->queue_size);
263 hdr_desc = &(q->desc[hdr_idx]);
265 PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
266 (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
268 if (guest_pa_to_host_va(virtio->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
269 PrintError("Could not translate receive buffer address\n");
273 //copy header to the header descriptor
274 memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr));
276 //copy data to the next descriptors
277 for (buf_idx = 0; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
278 struct vring_desc * buf_desc = &(q->desc[buf_idx]);
281 buf_desc->flags = VIRTIO_NEXT_FLAG;
283 len = copy_data_to_desc(virtio, buf_desc, buf + offset, data_len - offset);
286 buf_desc->length = len; // TODO: do we need this?
289 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
290 q->used->ring[q->used->index % q->queue_size].length = data_len; // What do we set this to????
296 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
297 PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
298 v3_pci_raise_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
299 virtio->virtio_cfg.pci_isr = 0x1;
306 int virtio_send(struct vm_device * dev, uchar_t * buf, uint_t size) {
307 return send_pkt_to_guest(dev, buf, size, 1, NULL);
311 static int get_desc_count(struct virtio_queue * q, int index) {
312 struct vring_desc * tmp_desc = &(q->desc[index]);
315 while (tmp_desc->flags & VIRTIO_NEXT_FLAG) {
316 tmp_desc = &(q->desc[tmp_desc->next]);
324 static int handle_ctrl(struct virtio_net_state * dev) {
328 //get packet from guest
329 static int handle_pkt_tx(struct virtio_net_state * virtio_state)
331 //struct virtio_net_state *virtio = (struct virtio_net_state *)dev->private_data;
332 struct virtio_queue * q = &(virtio_state->tx_vq);
334 PrintDebug("VIRTIO NIC pkt_tx: cur_index=%d (mod=%d), avail_index=%d\n",
335 q->cur_avail_idx, q->cur_avail_idx % q->queue_size, q->avail->index);
337 struct virtio_net_hdr * hdr = NULL;
339 while (q->cur_avail_idx < q->avail->index) {
340 struct vring_desc * hdr_desc = NULL;
342 uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
343 int desc_cnt = get_desc_count(q, desc_idx);
344 uint32_t req_len = 0;
347 PrintDebug("Descriptor Count=%d, index=%d\n", desc_cnt, q->cur_avail_idx % q->queue_size);
349 hdr_desc = &(q->desc[desc_idx]);
351 PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
352 (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
354 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
355 PrintError("Could not translate block header address\n");
359 //memcpy(&hdr, (void *)hdr_addr, sizeof(struct virtio_net_hdr));
360 hdr = (struct virtio_net_hdr*)hdr_addr;
362 PrintDebug("NIC Op Hdr (ptr=%p) header len =%x\n", (void *)hdr_addr, (int)hdr->hdr_len);
364 desc_idx = hdr_desc->next;
366 for (i = 0; i < desc_cnt - 1; i++) {
367 struct vring_desc * buf_desc = &(q->desc[desc_idx]);
369 PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", buf_desc,
370 (void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next);
372 if (pkt_write(virtio_state, buf_desc) == -1) {
373 PrintError("Error handling nic operation\n");
377 req_len += buf_desc->length;
378 desc_idx = buf_desc->next;
381 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
382 q->used->ring[q->used->index % q->queue_size].length = req_len; // What do we set this to????
388 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
389 PrintDebug("Raising IRQ %d\n", virtio_state->pci_dev->config_header.intr_line);
390 v3_pci_raise_irq(virtio_state->virtio_dev->pci_bus, 0, virtio_state->pci_dev);
391 virtio_state->virtio_cfg.pci_isr = 0x1;
398 static int virtio_setup_queue(struct virtio_net_state * virtio_state, struct virtio_queue * queue, addr_t pfn, addr_t page_addr) {
401 queue->ring_desc_addr = page_addr;
402 queue->ring_avail_addr = page_addr + (queue->queue_size * sizeof(struct vring_desc));
403 queue->ring_used_addr = ((queue->ring_avail_addr) +
404 (sizeof(struct vring_avail)) +
405 (queue->queue_size * sizeof(uint16_t)));
407 // round up to next page boundary.
408 queue->ring_used_addr = (queue->ring_used_addr + 0xfff) & ~0xfff;
410 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_desc_addr, (addr_t *)&(queue->desc)) == -1) {
411 PrintError("Could not translate ring descriptor address\n");
416 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_avail_addr, (addr_t *)&(queue->avail)) == -1) {
417 PrintError("Could not translate ring available address\n");
422 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_used_addr, (addr_t *)&(queue->used)) == -1) {
423 PrintError("Could not translate ring used address\n");
427 PrintDebug("RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
428 (void *)(queue->ring_desc_addr),
429 (void *)(queue->ring_avail_addr),
430 (void *)(queue->ring_used_addr));
432 PrintDebug("RingDesc=%p, Avail=%p, Used=%p\n",
433 queue->desc, queue->avail, queue->used);
440 static int virtio_io_write(uint16_t port, void * src, uint_t length, void * private_data)
442 //struct vm_device * dev = (struct vm_device *)private_data;
443 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
444 int port_idx = port % virtio->io_range_size;
447 PrintDebug("VIRTIO NIC Write for port %d (index=%d) len=%d, value=%x\n",
448 port, port_idx, length, *(uint32_t *)src);
452 case GUEST_FEATURES_PORT:
454 PrintError("Illegal write length for guest features\n");
458 virtio->virtio_cfg.guest_features = *(uint32_t *)src;
459 PrintDebug("Setting Guest Features to %x\n", virtio->virtio_cfg.guest_features);
462 case VRING_PG_NUM_PORT:
465 PrintError("Illegal write length for page frame number\n");
469 addr_t pfn = *(uint32_t *)src;
470 addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
471 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
475 virtio_setup_queue(virtio, &virtio->rx_vq, pfn, page_addr);
478 virtio_setup_queue(virtio, &virtio->tx_vq, pfn, page_addr);
481 virtio_setup_queue(virtio, &virtio->ctrl_vq, pfn, page_addr);
489 case VRING_Q_SEL_PORT:
490 virtio->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
492 if (virtio->virtio_cfg.vring_queue_selector > 2) {
493 PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
494 virtio->virtio_cfg.vring_queue_selector);
499 case VRING_Q_NOTIFY_PORT:
501 uint16_t queue_idx = *(uint16_t *)src;
503 PrintDebug("Handling Kick\n");
506 PrintError("receive queue notification\n");
507 } else if (queue_idx == 1){
508 if (handle_pkt_tx(virtio) == -1) {
509 PrintError("Could not handle NIC Notification\n");
512 } else if (queue_idx == 2){
513 if (handle_ctrl(virtio) == -1) {
514 PrintError("Could not handle NIC Notification\n");
518 PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
524 case VIRTIO_STATUS_PORT:
525 virtio->virtio_cfg.status = *(uint8_t *)src;
527 if (virtio->virtio_cfg.status == 0) {
528 PrintDebug("Resetting device\n");
529 virtio_reset(virtio);
534 case VIRTIO_ISR_PORT:
535 virtio->virtio_cfg.pci_isr = *(uint8_t *)src;
546 static int virtio_io_read(uint16_t port, void * dst, uint_t length, void * private_data)
548 //struct vm_device * dev = (struct vm_device *)private_data;
549 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
550 int port_idx = port % virtio->io_range_size;
551 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
553 PrintDebug("Virtio NIC: Read for port %d (index =%d), length=%d",
554 port, port_idx, length);
557 case HOST_FEATURES_PORT:
559 PrintError("Illegal read length for host features\n");
563 *(uint32_t *)dst = virtio->virtio_cfg.host_features;
565 PrintDebug("value=0x%x\n", *(uint32_t *)dst);
568 case VRING_PG_NUM_PORT:
571 PrintError("Illegal read length for page frame number\n");
577 *(uint32_t *)dst = virtio->rx_vq.pfn;
580 *(uint32_t *)dst = virtio->tx_vq.pfn;
583 *(uint32_t *)dst = virtio->ctrl_vq.pfn;
589 PrintDebug(", value=0x%x\n", *(uint32_t *)dst);
592 case VRING_SIZE_PORT:
595 PrintError("Illegal read length for vring size\n");
601 *(uint16_t *)dst = virtio->rx_vq.queue_size;
604 *(uint16_t *)dst = virtio->tx_vq.queue_size;
607 *(uint16_t *)dst = virtio->ctrl_vq.queue_size;
613 PrintDebug("queue index: %d, value=0x%x\n", (int)queue_idx, *(uint16_t *)dst);
616 case VIRTIO_STATUS_PORT:
619 PrintError("Illegal read length for status\n");
623 *(uint8_t *)dst = virtio->virtio_cfg.status;
625 PrintDebug(", value=0x%x\n", *(uint8_t *)dst);
628 case VIRTIO_ISR_PORT:
629 *(uint8_t *)dst = virtio->virtio_cfg.pci_isr;
630 virtio->virtio_cfg.pci_isr = 0;
631 v3_pci_lower_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
633 PrintDebug(", value=0x%x\n", *(uint8_t *)dst);
638 PrintError("Virtio NIC: Read of Unhandled Virtio Read\n");
646 static struct v3_device_ops dev_ops = {
654 static int register_dev(struct virtio_dev_state * virtio, struct virtio_net_state * net_state)
656 struct pci_device * pci_dev = NULL;
657 struct v3_pci_bar bars[6];
658 int num_ports = sizeof(struct virtio_config);
659 int tmp_ports = num_ports;
662 // This gets the number of ports, rounded up to a power of 2
663 net_state->io_range_size = 1; // must be a power of 2
665 while (tmp_ports > 0) {
667 net_state->io_range_size <<= 1;
670 // this is to account for any low order bits being set in num_ports
671 // if there are none, then num_ports was already a power of 2 so we shift right to reset it
672 if ((num_ports & ((net_state->io_range_size >> 1) - 1)) == 0) {
673 net_state->io_range_size >>= 1;
677 for (i = 0; i < 6; i++) {
678 bars[i].type = PCI_BAR_NONE;
681 PrintDebug("Virtio-NIC io_range_size = %d\n", net_state->io_range_size);
683 bars[0].type = PCI_BAR_IO;
684 bars[0].default_base_port = -1;
685 bars[0].num_ports = net_state->io_range_size;
687 bars[0].io_read = virtio_io_read;
688 bars[0].io_write = virtio_io_write;
689 bars[0].private_data = net_state;
691 pci_dev = v3_pci_register_device(virtio->pci_bus, PCI_STD_DEVICE,
692 0, PCI_AUTO_DEV_NUM, 0,
693 "LNX_VIRTIO_NIC", bars,
694 NULL, NULL, NULL, net_state);
697 PrintError("Virtio NIC: Could not register PCI Device\n");
701 PrintDebug("Virtio NIC: registered to PCI bus\n");
703 pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
704 pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
707 pci_dev->config_header.device_id = VIRTIO_NET_DEV_ID;
708 pci_dev->config_header.class = PCI_CLASS_NETWORK;
709 pci_dev->config_header.subclass = PCI_NET_SUBCLASS_OTHER;
711 pci_dev->config_header.subsystem_id = VIRTIO_NET_SUBDEVICE_ID;;
713 pci_dev->config_header.intr_pin = 1;
715 pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
718 net_state->pci_dev = pci_dev;
719 //net_state->pci_bus = pci_bus;
721 net_state->virtio_cfg.host_features = 0; //no features support now
723 net_state->rx_vq.queue_size = QUEUE_SIZE;
724 net_state->tx_vq.queue_size = QUEUE_SIZE;
725 net_state->ctrl_vq.queue_size = CTRL_QUEUE_SIZE;
727 net_state->virtio_dev = virtio;
729 virtio_reset(net_state);
736 static int connect_fn(struct guest_info * info,
737 void * frontend_data,
738 struct v3_dev_net_ops * ops,
740 void * private_data) {
741 struct virtio_dev_state * virtio = (struct virtio_dev_state *)frontend_data;
742 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
744 memset(net_state, 0, sizeof(struct virtio_net_state));
746 register_dev(virtio, net_state);
748 net_state->net_ops = ops;
749 net_state->backend_data = private_data;
755 static int virtio_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
756 struct vm_device * pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
757 struct virtio_dev_state * virtio_state = NULL;
758 char * name = v3_cfg_val(cfg, "name");
760 PrintDebug("Virtio NIC: Initializing VIRTIO Network device\n");
762 if (pci_bus == NULL) {
763 PrintError("Virtio NIC: VirtIO devices require a PCI Bus");
767 virtio_state = (struct virtio_dev_state *)V3_Malloc(sizeof(struct virtio_dev_state));
768 memset(virtio_state, 0, sizeof(struct virtio_dev_state));
770 INIT_LIST_HEAD(&(virtio_state->dev_list));
771 virtio_state->pci_bus = pci_bus;
772 virtio_state->vm = vm;
774 struct vm_device * dev = v3_allocate_device(name, &dev_ops, virtio_state);
775 if (v3_attach_device(vm, dev) == -1) {
776 PrintError("Virtio NIC: Could not attach device %s\n", name);
780 if (v3_dev_add_net_frontend(vm, name, connect_fn, (void *)virtio_state) == -1) {
781 PrintError("Virtio NIC: Could not register %s as net frontend\n", name);
786 //for temporary testing, add a backend
789 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
790 memset(net_state, 0, sizeof(struct virtio_net_state));
792 net_state->net_ops = (struct v3_dev_net_ops *)V3_Malloc(sizeof(struct v3_dev_net_ops));
794 net_state->net_ops->send = &send;
795 net_state->net_ops->receive = &receive;
797 register_dev(virtio_state, net_state);
799 PrintDebug("Virtio NIC After register Device: queue size: %d, %d\n",
800 net_state->rx_vq.queue_size, net_state->tx_vq.queue_size);
808 device_register("LNX_VIRTIO_NIC", virtio_init)