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 struct virtio_net_state *temp_net_states[3];
116 static int net_idx = 0;
118 static int __virtio_dev_send(uchar_t * buf, uint32_t size, void *private_data);
120 static int send(uint8_t * buf, uint32_t count, void * private_data, struct vm_device *dest_dev)
122 PrintDebug("Virito NIC: In sending stub, guest %p\n", private_data);
123 print_packet(buf, count);
124 struct virtio_net_state *virtio_state = (struct virtio_net_state *)private_data;
126 if (virtio_state == temp_net_states[0])
127 __virtio_dev_send(buf, count, temp_net_states[1]);
132 static int receive(uint8_t * buf, uint32_t count, void * private_data, struct vm_device *src_dev)
134 PrintDebug("Virito NIC: In receiveing stub\n");
141 static int virtio_free(struct vm_device * dev)
147 static int virtio_reset(struct virtio_net_state * virtio)
149 virtio->rx_vq.ring_desc_addr = 0;
150 virtio->rx_vq.ring_avail_addr = 0;
151 virtio->rx_vq.ring_used_addr = 0;
152 virtio->rx_vq.pfn = 0;
153 virtio->rx_vq.cur_avail_idx = 0;
155 virtio->tx_vq.ring_desc_addr = 0;
156 virtio->tx_vq.ring_avail_addr = 0;
157 virtio->tx_vq.ring_used_addr = 0;
158 virtio->tx_vq.pfn = 0;
159 virtio->tx_vq.cur_avail_idx = 0;
161 virtio->ctrl_vq.ring_desc_addr = 0;
162 virtio->ctrl_vq.ring_avail_addr = 0;
163 virtio->ctrl_vq.ring_used_addr = 0;
164 virtio->ctrl_vq.pfn = 0;
165 virtio->ctrl_vq.cur_avail_idx = 0;
167 virtio->virtio_cfg.host_features = 0;
168 //virtio->virtio_cfg.status = VIRTIO_NET_S_LINK_UP;
169 virtio->virtio_cfg.pci_isr = 0;
175 //sending guest's packet to network sink
176 static int pkt_write(struct virtio_net_state * virtio, struct vring_desc * buf_desc)
178 //struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
179 uint8_t * buf = NULL;
180 uint32_t len = buf_desc->length;
182 PrintDebug("Handling Virtio Net write, net_state: %p\n", virtio);
184 if (guest_pa_to_host_va(virtio->virtio_dev->vm, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
185 PrintError("Could not translate buffer address\n");
189 PrintDebug("Length=%d\n", buf_desc->length);
190 PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d, buf address: %p, send address: %p\n", buf_desc,
191 (void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next, buf, virtio->net_ops->send);
193 if (virtio->net_ops->send(buf, len, (void *)virtio, NULL) == -1) {
201 static int build_receive_header(struct virtio_net_hdr * hdr, const void * buf, int raw) {
205 memcpy(hdr, buf, sizeof(struct virtio_net_hdr));
207 memset(hdr, 0, sizeof(struct virtio_net_hdr));
214 //sending guest's packet to network sink
215 static int copy_data_to_desc(struct virtio_net_state * virtio_state, struct vring_desc * desc, uchar_t * buf, uint_t buf_len)
218 uint8_t * desc_buf = NULL;
220 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
221 PrintError("Could not translate buffer address\n");
225 len = (desc->length < buf_len)?desc->length:buf_len;
227 memcpy(desc_buf, buf, len);
229 PrintDebug("Length=%d\n", len);
236 static int send_pkt_to_guest(struct virtio_net_state * virtio, uchar_t * buf, uint_t size, int raw, void * private_data)
238 struct virtio_queue * q = &(virtio->rx_vq);
239 struct virtio_net_hdr hdr;
240 uint32_t hdr_len = sizeof(struct virtio_net_hdr);
241 uint32_t data_len = size;
244 PrintDebug("VIRTIO NIC: Handle RX: cur_index=%d (mod=%d), avail_index=%d\n",
245 q->cur_avail_idx, q->cur_avail_idx % q->queue_size, q->avail->index);
247 PrintDebug("VIRTIO NIC: sending packet to net_state %p, size:%d", virtio, size);
253 build_receive_header(&hdr, buf, 1);
255 //queue is not set yet
256 if (q->ring_avail_addr == 0) {
257 PrintError("Queue is not set\n");
262 if (q->cur_avail_idx < q->avail->index) {
264 uint16_t hdr_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
265 uint16_t buf_idx = 0;
266 struct vring_desc * hdr_desc = NULL;
268 PrintDebug("Descriptor index=%d\n", q->cur_avail_idx % q->queue_size);
270 hdr_desc = &(q->desc[hdr_idx]);
272 PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
273 (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
275 if (guest_pa_to_host_va(virtio->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
276 PrintError("Could not translate receive buffer address\n");
280 //copy header to the header descriptor
281 memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr));
283 //copy data to the next descriptors
284 for (buf_idx = 0; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
285 struct vring_desc * buf_desc = &(q->desc[buf_idx]);
288 buf_desc->flags = VIRTIO_NEXT_FLAG;
290 len = copy_data_to_desc(virtio, buf_desc, buf + offset, data_len - offset);
293 buf_desc->length = len; // TODO: do we need this?
296 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
297 q->used->ring[q->used->index % q->queue_size].length = data_len; // What do we set this to????
303 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
304 PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
305 v3_pci_raise_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
306 virtio->virtio_cfg.pci_isr = 0x1;
314 int virtio_send(struct guest_info * vm, char *dev_name, uchar_t * buf, uint_t size) {
315 struct vm_device * virtio_dev = v3_find_dev(vm, dev_name);
317 // TODO: how to get virtio net state from device??
318 // this is not right now
319 struct virtio_net_state * virtio_state = (struct virtio_net_state *)virtio_dev->private_data;
321 return send_pkt_to_guest(virtio_state, buf, size, 1, NULL);
325 static int __virtio_dev_send(uchar_t * buf, uint32_t size, void *private_data) {
326 struct virtio_net_state *virtio_state = (struct virtio_net_state *)private_data;
328 return send_pkt_to_guest(virtio_state, buf, size, 1, NULL);
331 static int get_desc_count(struct virtio_queue * q, int index) {
332 struct vring_desc * tmp_desc = &(q->desc[index]);
335 while (tmp_desc->flags & VIRTIO_NEXT_FLAG) {
336 tmp_desc = &(q->desc[tmp_desc->next]);
344 static int handle_ctrl(struct virtio_net_state * dev) {
348 //get packet from guest
349 static int handle_pkt_tx(struct virtio_net_state * virtio_state)
351 //struct virtio_net_state *virtio = (struct virtio_net_state *)dev->private_data;
352 struct virtio_queue * q = &(virtio_state->tx_vq);
354 PrintDebug("VIRTIO NIC pkt_tx: cur_index=%d (mod=%d), avail_index=%d\n",
355 q->cur_avail_idx, q->cur_avail_idx % q->queue_size, q->avail->index);
357 struct virtio_net_hdr * hdr = NULL;
359 while (q->cur_avail_idx < q->avail->index) {
360 struct vring_desc * hdr_desc = NULL;
362 uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
363 int desc_cnt = get_desc_count(q, desc_idx);
364 uint32_t req_len = 0;
367 PrintDebug("Descriptor Count=%d, index=%d\n", desc_cnt, q->cur_avail_idx % q->queue_size);
369 hdr_desc = &(q->desc[desc_idx]);
371 PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
372 (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
374 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
375 PrintError("Could not translate block header address\n");
379 //memcpy(&hdr, (void *)hdr_addr, sizeof(struct virtio_net_hdr));
380 hdr = (struct virtio_net_hdr*)hdr_addr;
382 PrintDebug("NIC Op Hdr (ptr=%p) header len =%x\n", (void *)hdr_addr, (int)hdr->hdr_len);
384 desc_idx = hdr_desc->next;
386 for (i = 0; i < desc_cnt - 1; i++) {
387 struct vring_desc * buf_desc = &(q->desc[desc_idx]);
389 PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", buf_desc,
390 (void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next);
392 if (pkt_write(virtio_state, buf_desc) == -1) {
393 PrintError("Error handling nic operation\n");
397 req_len += buf_desc->length;
398 desc_idx = buf_desc->next;
401 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
402 q->used->ring[q->used->index % q->queue_size].length = req_len; // What do we set this to????
408 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
409 PrintDebug("Raising IRQ %d\n", virtio_state->pci_dev->config_header.intr_line);
410 v3_pci_raise_irq(virtio_state->virtio_dev->pci_bus, 0, virtio_state->pci_dev);
411 virtio_state->virtio_cfg.pci_isr = 0x1;
418 static int virtio_setup_queue(struct virtio_net_state * virtio_state, struct virtio_queue * queue, addr_t pfn, addr_t page_addr) {
421 queue->ring_desc_addr = page_addr;
422 queue->ring_avail_addr = page_addr + (queue->queue_size * sizeof(struct vring_desc));
423 queue->ring_used_addr = ((queue->ring_avail_addr) +
424 (sizeof(struct vring_avail)) +
425 (queue->queue_size * sizeof(uint16_t)));
427 // round up to next page boundary.
428 queue->ring_used_addr = (queue->ring_used_addr + 0xfff) & ~0xfff;
430 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_desc_addr, (addr_t *)&(queue->desc)) == -1) {
431 PrintError("Could not translate ring descriptor address\n");
436 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_avail_addr, (addr_t *)&(queue->avail)) == -1) {
437 PrintError("Could not translate ring available address\n");
442 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_used_addr, (addr_t *)&(queue->used)) == -1) {
443 PrintError("Could not translate ring used address\n");
447 PrintDebug("RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
448 (void *)(queue->ring_desc_addr),
449 (void *)(queue->ring_avail_addr),
450 (void *)(queue->ring_used_addr));
452 PrintDebug("RingDesc=%p, Avail=%p, Used=%p\n",
453 queue->desc, queue->avail, queue->used);
460 static int virtio_io_write(uint16_t port, void * src, uint_t length, void * private_data)
462 //struct vm_device * dev = (struct vm_device *)private_data;
463 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
464 int port_idx = port % virtio->io_range_size;
467 PrintDebug("VIRTIO NIC %p Write for port %d (index=%d) len=%d, value=%x\n", private_data,
468 port, port_idx, length, *(uint32_t *)src);
472 case GUEST_FEATURES_PORT:
474 PrintError("Illegal write length for guest features\n");
478 virtio->virtio_cfg.guest_features = *(uint32_t *)src;
479 PrintDebug("Setting Guest Features to %x\n", virtio->virtio_cfg.guest_features);
482 case VRING_PG_NUM_PORT:
485 PrintError("Illegal write length for page frame number\n");
489 addr_t pfn = *(uint32_t *)src;
490 addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
491 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
495 virtio_setup_queue(virtio, &virtio->rx_vq, pfn, page_addr);
498 virtio_setup_queue(virtio, &virtio->tx_vq, pfn, page_addr);
501 virtio_setup_queue(virtio, &virtio->ctrl_vq, pfn, page_addr);
509 case VRING_Q_SEL_PORT:
510 virtio->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
512 if (virtio->virtio_cfg.vring_queue_selector > 2) {
513 PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
514 virtio->virtio_cfg.vring_queue_selector);
519 case VRING_Q_NOTIFY_PORT:
521 uint16_t queue_idx = *(uint16_t *)src;
523 PrintDebug("Handling Kick\n");
526 PrintError("receive queue notification\n");
527 } else if (queue_idx == 1){
528 if (handle_pkt_tx(virtio) == -1) {
529 PrintError("Could not handle NIC Notification\n");
532 } else if (queue_idx == 2){
533 if (handle_ctrl(virtio) == -1) {
534 PrintError("Could not handle NIC Notification\n");
538 PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
544 case VIRTIO_STATUS_PORT:
545 virtio->virtio_cfg.status = *(uint8_t *)src;
547 if (virtio->virtio_cfg.status == 0) {
548 PrintDebug("Resetting device\n");
549 virtio_reset(virtio);
554 case VIRTIO_ISR_PORT:
555 virtio->virtio_cfg.pci_isr = *(uint8_t *)src;
566 static int virtio_io_read(uint16_t port, void * dst, uint_t length, void * private_data)
568 //struct vm_device * dev = (struct vm_device *)private_data;
569 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
570 int port_idx = port % virtio->io_range_size;
571 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
573 PrintDebug("Virtio NIC %p: Read for port %d (index =%d), length=%d", private_data,
574 port, port_idx, length);
577 case HOST_FEATURES_PORT:
579 PrintError("Illegal read length for host features\n");
583 *(uint32_t *)dst = virtio->virtio_cfg.host_features;
585 PrintDebug("value=0x%x\n", *(uint32_t *)dst);
588 case VRING_PG_NUM_PORT:
591 PrintError("Illegal read length for page frame number\n");
597 *(uint32_t *)dst = virtio->rx_vq.pfn;
600 *(uint32_t *)dst = virtio->tx_vq.pfn;
603 *(uint32_t *)dst = virtio->ctrl_vq.pfn;
609 PrintDebug(", value=0x%x\n", *(uint32_t *)dst);
612 case VRING_SIZE_PORT:
615 PrintError("Illegal read length for vring size\n");
621 *(uint16_t *)dst = virtio->rx_vq.queue_size;
624 *(uint16_t *)dst = virtio->tx_vq.queue_size;
627 *(uint16_t *)dst = virtio->ctrl_vq.queue_size;
633 PrintDebug("queue index: %d, value=0x%x\n", (int)queue_idx, *(uint16_t *)dst);
636 case VIRTIO_STATUS_PORT:
639 PrintError("Illegal read length for status\n");
643 *(uint8_t *)dst = virtio->virtio_cfg.status;
645 PrintDebug(", value=0x%x\n", *(uint8_t *)dst);
648 case VIRTIO_ISR_PORT:
649 *(uint8_t *)dst = virtio->virtio_cfg.pci_isr;
650 virtio->virtio_cfg.pci_isr = 0;
651 v3_pci_lower_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
653 PrintDebug(", value=0x%x\n", *(uint8_t *)dst);
658 PrintError("Virtio NIC: Read of Unhandled Virtio Read\n");
666 static struct v3_device_ops dev_ops = {
674 static int register_dev(struct virtio_dev_state * virtio, struct virtio_net_state * net_state)
676 struct pci_device * pci_dev = NULL;
677 struct v3_pci_bar bars[6];
678 int num_ports = sizeof(struct virtio_config);
679 int tmp_ports = num_ports;
682 // This gets the number of ports, rounded up to a power of 2
683 net_state->io_range_size = 1; // must be a power of 2
685 while (tmp_ports > 0) {
687 net_state->io_range_size <<= 1;
690 // this is to account for any low order bits being set in num_ports
691 // if there are none, then num_ports was already a power of 2 so we shift right to reset it
692 if ((num_ports & ((net_state->io_range_size >> 1) - 1)) == 0) {
693 net_state->io_range_size >>= 1;
697 for (i = 0; i < 6; i++) {
698 bars[i].type = PCI_BAR_NONE;
701 PrintDebug("Virtio-NIC io_range_size = %d\n", net_state->io_range_size);
703 bars[0].type = PCI_BAR_IO;
704 bars[0].default_base_port = -1;
705 bars[0].num_ports = net_state->io_range_size;
707 bars[0].io_read = virtio_io_read;
708 bars[0].io_write = virtio_io_write;
709 bars[0].private_data = net_state;
711 pci_dev = v3_pci_register_device(virtio->pci_bus, PCI_STD_DEVICE,
712 0, PCI_AUTO_DEV_NUM, 0,
713 "LNX_VIRTIO_NIC", bars,
714 NULL, NULL, NULL, net_state);
717 PrintError("Virtio NIC: Could not register PCI Device\n");
721 PrintDebug("Virtio NIC: registered to PCI bus\n");
723 pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
724 pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
727 pci_dev->config_header.device_id = VIRTIO_NET_DEV_ID;
728 pci_dev->config_header.class = PCI_CLASS_NETWORK;
729 pci_dev->config_header.subclass = PCI_NET_SUBCLASS_OTHER;
731 pci_dev->config_header.subsystem_id = VIRTIO_NET_SUBDEVICE_ID;;
733 pci_dev->config_header.intr_pin = 1;
735 pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
738 net_state->pci_dev = pci_dev;
739 //net_state->pci_bus = pci_bus;
741 net_state->virtio_cfg.host_features = 0; //no features support now
743 net_state->rx_vq.queue_size = QUEUE_SIZE;
744 net_state->tx_vq.queue_size = QUEUE_SIZE;
745 net_state->ctrl_vq.queue_size = CTRL_QUEUE_SIZE;
747 net_state->virtio_dev = virtio;
749 virtio_reset(net_state);
756 static int connect_fn(struct guest_info * info,
757 void * frontend_data,
758 struct v3_dev_net_ops * ops,
760 void * private_data) {
761 struct virtio_dev_state * virtio = (struct virtio_dev_state *)frontend_data;
762 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
764 memset(net_state, 0, sizeof(struct virtio_net_state));
766 register_dev(virtio, net_state);
768 net_state->net_ops = ops;
769 net_state->backend_data = private_data;
775 static int virtio_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
776 struct vm_device * pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
777 struct virtio_dev_state * virtio_state = NULL;
778 char * name = v3_cfg_val(cfg, "name");
780 PrintDebug("Virtio NIC: Initializing VIRTIO Network device: %s\n", name);
782 if (pci_bus == NULL) {
783 PrintError("Virtio NIC: VirtIO devices require a PCI Bus");
787 virtio_state = (struct virtio_dev_state *)V3_Malloc(sizeof(struct virtio_dev_state));
788 memset(virtio_state, 0, sizeof(struct virtio_dev_state));
790 INIT_LIST_HEAD(&(virtio_state->dev_list));
791 virtio_state->pci_bus = pci_bus;
792 virtio_state->vm = vm;
794 struct vm_device * dev = v3_allocate_device(name, &dev_ops, virtio_state);
795 if (v3_attach_device(vm, dev) == -1) {
796 PrintError("Virtio NIC: Could not attach device %s\n", name);
800 if (v3_dev_add_net_frontend(vm, name, connect_fn, (void *)virtio_state) == -1) {
801 PrintError("Virtio NIC: Could not register %s as net frontend\n", name);
806 //for temporary testing, add a backend
809 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
810 memset(net_state, 0, sizeof(struct virtio_net_state));
812 net_state->net_ops = (struct v3_dev_net_ops *)V3_Malloc(sizeof(struct v3_dev_net_ops));
814 net_state->net_ops->send = &send;
815 net_state->net_ops->receive = &receive;
817 register_dev(virtio_state, net_state);
819 PrintDebug("Virtio NIC After register Device %s: queue size: %d, %d\n", dev->name,
820 net_state->rx_vq.queue_size, net_state->tx_vq.queue_size);
822 temp_net_states[net_idx ++] = net_state;
824 PrintDebug("Net_states: 0: %p, 1: %p, 2: %p\n", temp_net_states[0], temp_net_states[1], temp_net_states[2]);
831 device_register("LNX_VIRTIO_NIC", virtio_init)