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;
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)
210 memcpy(hdr, buf, sizeof(struct virtio_net_hdr));
212 memset(hdr, 0, sizeof(struct virtio_net_hdr));
219 //sending guest's packet to network sink
220 static int copy_data_to_desc(struct virtio_net_state * virtio_state, struct vring_desc *desc, uchar_t *buf, uint_t buf_len)
223 uint8_t *desc_buf = NULL;
225 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
226 PrintError("Could not translate buffer address\n");
230 len = (desc->length < buf_len)?desc->length:buf_len;
232 memcpy(desc_buf, buf, len);
234 PrintDebug("Length=%d\n", len);
241 static int send_pkt_to_guest(struct vm_device *dev, uchar_t *buf, uint_t size, int raw, void *private_data)
243 // TODO: This should not be like this
244 struct virtio_net_state *virtio = (struct virtio_net_state *)dev->private_data;
245 struct virtio_queue *q = &(virtio->rx_vq);
247 PrintDebug("VIRTIO Handle RX: cur_index=%d (mod=%d), avail_index=%d\n",
248 q->cur_avail_idx, q->cur_avail_idx % q->queue_size, q->avail->index);
250 struct virtio_net_hdr hdr;
251 uint32_t hdr_len = sizeof(struct virtio_net_hdr);
253 uint32_t data_len = size;
257 build_receive_header(&hdr, buf, 1);
259 //queue is not set yet
260 if (q->ring_avail_addr == 0)
263 \r uint32_t offset = 0;
264 if (q->cur_avail_idx < q->avail->index) {
265 struct vring_desc * hdr_desc = NULL;
267 uint16_t hdr_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
269 PrintDebug("Descriptor index=%d\n", q->cur_avail_idx % q->queue_size);
271 hdr_desc = &(q->desc[hdr_idx]);
273 PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
274 (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
276 if (guest_pa_to_host_va(virtio->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
277 PrintError("Could not translate receive buffer address\n");
281 //copy header to the header descriptor
282 memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr));
284 uint16_t buf_idx = 0;
285 struct vring_desc * buf_desc = NULL;
286 //copy data to the next descriptors
287 for (buf_idx = 0; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
288 q->desc[buf_idx].flags = VIRTIO_NEXT_FLAG;
289 buf_desc = &(q->desc[buf_idx]);
290 uint32_t len = copy_data_to_desc(virtio, buf_desc, buf+offset, data_len - offset);
292 buf_desc->length = len; // TODO: do we need this?
295 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
296 q->used->ring[q->used->index % q->queue_size].length = data_len; // What do we set this to????
302 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
303 PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
304 v3_pci_raise_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
305 virtio->virtio_cfg.pci_isr = 0x1;
312 int virtio_send(struct vm_device * dev, uchar_t *buf, uint_t size)
314 return send_pkt_to_guest(dev, buf, size, 1, NULL);
318 static int get_desc_count(struct virtio_queue * q, int index)
320 struct vring_desc * tmp_desc = &(q->desc[index]);
323 while (tmp_desc->flags & VIRTIO_NEXT_FLAG) {
324 tmp_desc = &(q->desc[tmp_desc->next]);
332 static int handle_ctrl(struct virtio_net_state * dev)
339 //get packet from guest
340 static int handle_pkt_tx(struct virtio_net_state * virtio_state)
342 //struct virtio_net_state *virtio = (struct virtio_net_state *)dev->private_data;
343 struct virtio_queue *q = &(virtio_state->tx_vq);
345 PrintDebug("VIRTIO NIC pkt_tx: cur_index=%d (mod=%d), avail_index=%d\n",
346 q->cur_avail_idx, q->cur_avail_idx % q->queue_size, q->avail->index);
348 struct virtio_net_hdr *hdr = NULL;
350 while (q->cur_avail_idx < q->avail->index) {
351 struct vring_desc * hdr_desc = NULL;
352 struct vring_desc * buf_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;
359 PrintDebug("Descriptor Count=%d, index=%d\n", desc_cnt, q->cur_avail_idx % q->queue_size);
361 hdr_desc = &(q->desc[desc_idx]);
363 PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
364 (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
366 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
367 PrintError("Could not translate block header address\n");
371 //memcpy(&hdr, (void *)hdr_addr, sizeof(struct virtio_net_hdr));
372 hdr = (struct virtio_net_hdr*)hdr_addr;
374 PrintDebug("NIC Op Hdr (ptr=%p) header len =%x\n", (void *)hdr_addr, (int)hdr->hdr_len);
376 desc_idx= hdr_desc->next;
378 for (i = 0; i < desc_cnt - 1; i++) {
379 buf_desc = &(q->desc[desc_idx]);
381 PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", buf_desc,
382 (void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next);
384 if (pkt_write(virtio_state, buf_desc) == -1) {
385 PrintError("Error handling nic operation\n");
389 req_len += buf_desc->length;
390 desc_idx = buf_desc->next;
393 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
394 q->used->ring[q->used->index % q->queue_size].length = req_len; // What do we set this to????
400 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
401 PrintDebug("Raising IRQ %d\n", virtio_state->pci_dev->config_header.intr_line);
402 v3_pci_raise_irq(virtio_state->virtio_dev->pci_bus, 0, virtio_state->pci_dev);
403 virtio_state->virtio_cfg.pci_isr = 0x1;
410 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:
477 addr_t pfn = *(uint32_t *)src;
478 addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
480 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
483 virtio_setup_queue(virtio, &virtio->rx_vq, pfn, page_addr);
486 virtio_setup_queue(virtio, &virtio->tx_vq, pfn, page_addr);
489 virtio_setup_queue(virtio, &virtio->ctrl_vq, pfn, page_addr);
496 PrintError("Illegal write length for page frame number\n");
500 case VRING_Q_SEL_PORT:
501 virtio->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
503 if (virtio->virtio_cfg.vring_queue_selector > 2) {
504 PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
505 virtio->virtio_cfg.vring_queue_selector);
510 case VRING_Q_NOTIFY_PORT:
511 PrintDebug("Handling Kick\n");
512 uint16_t queue_idx = *(uint16_t *)src;
514 PrintError("receive queue notification\n");
515 }else if (queue_idx == 1){
516 if (handle_pkt_tx(virtio) == -1) {
517 PrintError("Could not handle NIC Notification\n");
520 }else if (queue_idx == 2){
521 if (handle_ctrl(virtio) == -1) {
522 PrintError("Could not handle NIC Notification\n");
526 PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
531 case VIRTIO_STATUS_PORT:
532 virtio->virtio_cfg.status = *(uint8_t *)src;
534 if (virtio->virtio_cfg.status == 0) {
535 PrintDebug("Resetting device\n");
536 virtio_reset(virtio);
541 case VIRTIO_ISR_PORT:
542 virtio->virtio_cfg.pci_isr = *(uint8_t *)src;
553 static int virtio_io_read(uint16_t port, void * dst, uint_t length, void * private_data)
555 //struct vm_device * dev = (struct vm_device *)private_data;
556 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
557 int port_idx = port % virtio->io_range_size;
558 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
560 PrintDebug("VIRTIO NIC Read for port %d (index =%d), length=%d",
561 port, port_idx, length);
564 case HOST_FEATURES_PORT:
566 PrintError("Illegal read length for host features\n");
570 *(uint32_t *)dst = virtio->virtio_cfg.host_features;
572 PrintDebug("value=0x%x\n", (int)*(uint32_t *)dst);
575 case VRING_PG_NUM_PORT:
578 PrintError("Illegal read length for page frame number\n");
584 *(uint32_t *)dst = virtio->rx_vq.pfn;
587 *(uint32_t *)dst = virtio->tx_vq.pfn;
590 *(uint32_t *)dst = virtio->ctrl_vq.pfn;
595 PrintDebug(", value=0x%x\n", (int)*(uint32_t *)dst);
598 case VRING_SIZE_PORT:
600 PrintError("Illegal read length for vring size\n");
606 *(uint16_t *)dst = virtio->rx_vq.queue_size;
609 *(uint16_t *)dst = virtio->tx_vq.queue_size;
612 *(uint16_t *)dst = virtio->ctrl_vq.queue_size;
618 PrintDebug("queue index: %d, value=0x%x\n", (int)queue_idx, (int)(int)*(uint16_t *)dst);
621 case VIRTIO_STATUS_PORT:
623 PrintError("Illegal read length for status\n");
627 *(uint8_t *)dst = virtio->virtio_cfg.status;
629 PrintDebug(", value=0x%x\n", (int)*(uint8_t *)dst);
632 case VIRTIO_ISR_PORT:
633 *(uint8_t *)dst = virtio->virtio_cfg.pci_isr;
634 virtio->virtio_cfg.pci_isr = 0;
635 v3_pci_lower_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
637 PrintDebug(", value=0x%x\n", (int)*(uint8_t *)dst);
642 PrintError("Read of Unhandled Virtio Read\n");
650 static struct v3_device_ops dev_ops = {
658 static int register_dev(struct virtio_dev_state * virtio, struct virtio_net_state * net_state)
660 struct pci_device * pci_dev = NULL;
661 struct v3_pci_bar bars[6];
662 int num_ports = sizeof(struct virtio_config);
663 int tmp_ports = num_ports;
666 // This gets the number of ports, rounded up to a power of 2
667 net_state->io_range_size = 1; // must be a power of 2
669 while (tmp_ports > 0) {
671 net_state->io_range_size <<= 1;
674 // this is to account for any low order bits being set in num_ports
675 // if there are none, then num_ports was already a power of 2 so we shift right to reset it
676 if ((num_ports & ((net_state->io_range_size >> 1) - 1)) == 0) {
677 net_state->io_range_size >>= 1;
681 for (i = 0; i < 6; i++) {
682 bars[i].type = PCI_BAR_NONE;
685 PrintDebug("Virtio-NIC io_range_size = %d\n", net_state->io_range_size);
687 bars[0].type = PCI_BAR_IO;
688 bars[0].default_base_port = -1;
689 bars[0].num_ports = net_state->io_range_size;
691 bars[0].io_read = virtio_io_read;
692 bars[0].io_write = virtio_io_write;
693 bars[0].private_data = net_state;
695 pci_dev = v3_pci_register_device(virtio->pci_bus, PCI_STD_DEVICE,
696 0, PCI_AUTO_DEV_NUM, 0,
697 "LNX_VIRTIO_NIC", bars,
698 NULL, NULL, NULL, net_state);
701 PrintError("Could not register PCI Device\n");
705 PrintDebug("Virtio-NIC registered to PCI bus\n");
707 pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
708 pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
711 pci_dev->config_header.device_id = VIRTIO_NET_DEV_ID;
712 pci_dev->config_header.class = PCI_CLASS_NETWORK;
713 pci_dev->config_header.subclass = PCI_NET_SUBCLASS_OTHER;
715 pci_dev->config_header.subsystem_id = VIRTIO_NET_SUBDEVICE_ID;;
717 pci_dev->config_header.intr_pin = 1;
719 pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
722 net_state->pci_dev = pci_dev;
723 //net_state->pci_bus = pci_bus;
725 net_state->virtio_cfg.host_features = 0; //no features support now
727 net_state->rx_vq.queue_size = QUEUE_SIZE;
728 net_state->tx_vq.queue_size = QUEUE_SIZE;
729 net_state->ctrl_vq.queue_size = CTRL_QUEUE_SIZE;
731 net_state->virtio_dev = virtio;
733 virtio_reset(net_state);
740 static int connect_fn(struct guest_info * info,
741 void * frontend_data,
742 struct v3_dev_net_ops * ops,
746 struct virtio_dev_state * virtio = (struct virtio_dev_state *)frontend_data;
748 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
749 memset(net_state, 0, sizeof(struct virtio_net_state));
751 register_dev(virtio, net_state);
753 net_state->net_ops = ops;
754 net_state->backend_data = private_data;
760 struct net_frontend {
761 int (*connect)(struct guest_info * info,
762 void * frontend_data,
763 struct v3_dev_net_ops * ops,
768 struct list_head net_node;
774 int v3_dev_add_net_frontend(struct guest_info * info,
776 int (*connect)(struct guest_info * info,
777 void * frontend_data,
778 struct v3_dev_net_ops * ops,
780 void * private_data),
783 struct net_frontend * frontend = NULL;
785 frontend = (struct net_frontend *)V3_Malloc(sizeof(struct net_frontend));
786 memset(frontend, 0, sizeof(struct net_frontend));
788 frontend->connect = connect;
789 frontend->priv_data = priv_data;
791 list_add(&(frontend->net_node), &(info->dev_mgr.net_list));
792 v3_htable_insert(info->dev_mgr.net_table, (addr_t)(name), (addr_t)frontend);
798 int v3_dev_connect_net(struct guest_info * info,
799 char * frontend_name,
800 struct v3_dev_net_ops * ops,
804 struct net_frontend * frontend = NULL;
806 frontend = (struct net_frontend *)v3_htable_search(info->dev_mgr.net_table,
807 (addr_t)frontend_name);
809 if (frontend == NULL) {
810 PrintError("Could not find frontend net device %s\n", frontend_name);
814 if (frontend->connect(info, frontend->priv_data, ops, cfg, private_data) == -1) {
815 PrintError("Error connecting to net frontend %s\n", frontend_name);
822 static int virtio_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
823 struct vm_device * pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
824 struct virtio_dev_state * virtio_state = NULL;
825 char * name = v3_cfg_val(cfg, "name");
827 PrintDebug("Initializing VIRTIO Network device\n");
829 if (pci_bus == NULL) {
830 PrintError("VirtIO devices require a PCI Bus");
834 virtio_state = (struct virtio_dev_state *)V3_Malloc(sizeof(struct virtio_dev_state));
835 memset(virtio_state, 0, sizeof(struct virtio_dev_state));
837 INIT_LIST_HEAD(&(virtio_state->dev_list));
838 virtio_state->pci_bus = pci_bus;
839 virtio_state->vm = vm;
841 struct vm_device * dev = v3_allocate_device(name, &dev_ops, virtio_state);
842 if (v3_attach_device(vm, dev) == -1) {
843 PrintError("Could not attach device %s\n", name);
847 if (v3_dev_add_net_frontend(vm, name, connect_fn, (void *)virtio_state) == -1) {
848 PrintError("Could not register %s as net frontend\n", name);
853 //for temporary testing, add a backend
856 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
857 memset(net_state, 0, sizeof(struct virtio_net_state));
859 net_state->net_ops = (struct v3_dev_net_ops *)V3_Malloc(sizeof(struct v3_dev_net_ops));
861 net_state->net_ops->send = &send;
862 net_state->net_ops->receive = &receive;
864 register_dev(virtio_state, net_state);
866 PrintDebug("Virtio NIC After register Device: queue size: %d, %d\n",
867 net_state->rx_vq.queue_size, net_state->tx_vq.queue_size);
875 device_register("LNX_VIRTIO_NIC", virtio_init)