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, Lei Xia <lxia@northwestern.edu>
11 * Copyright (c) 2008, Cui Zheng <cuizheng@cs.unm.edu>
12 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
13 * All rights reserved.
15 * Author: Lei Xia <lxia@northwestern.edu>
16 * Cui Zheng <cuizheng@cs.unm.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>
28 #include <palacios/vmm_vnet.h>
30 #include <devices/pci.h>
33 #ifndef CONFIG_DEBUG_VIRTIO_NET
35 #define PrintDebug(fmt, args...)
38 //#define VIRTIO_NIC_PROFILE
40 /* The feature bitmap for virtio net */
41 #define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */
42 #define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */
43 #define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
44 #define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
45 #define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */
46 #define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */
47 #define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */
48 #define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */
49 #define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
50 #define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */
51 #define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */
52 #define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */
53 #define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
54 #define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */
55 #define VIRTIO_NET_F_CTRL_VQ 17 /* Control channel available */
56 #define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */
57 #define VIRTIO_NET_F_CTRL_VLAN 19 /* Control channel VLAN filtering */
58 #define VIRTIO_NET_F_CTRL_RX_EXTRA 20 /* Extra RX mode control support */
59 #define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
61 /* Maximum packet size we can receive from tap device: header + 64k */
62 #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
64 struct virtio_net_hdr {
67 #define VIRTIO_NET_HDR_GSO_NONE 0 /* Not a GSO frame */
70 uint16_t hdr_len; /* Ethernet + IP + tcp/udp hdrs */
71 uint16_t gso_size; /* Bytes to append to hdr_len per frame */
72 uint16_t csum_start; /* Position to start checksumming from */
73 uint16_t csum_offset; /* Offset after that to place checksum */
74 }__attribute__((packed));
77 #define QUEUE_SIZE 4096
78 #define CTRL_QUEUE_SIZE 64
81 struct virtio_net_config
83 uint8_t mac[ETH_ALEN]; //VIRTIO_NET_F_MAC
85 } __attribute__((packed));
87 struct virtio_dev_state {
88 struct vm_device * pci_bus;
89 struct list_head dev_list;
90 struct guest_info * vm;
93 struct virtio_net_state {
94 struct virtio_net_config net_cfg;
95 struct virtio_config virtio_cfg;
97 struct pci_device * pci_dev;
100 struct virtio_queue rx_vq; //index 0, rvq in Linux virtio driver, handle packet to guest
101 struct virtio_queue tx_vq; //index 1, svq in Linux virtio driver, handle packet from guest
102 struct virtio_queue ctrl_vq; //index 2, ctrol info from guest
104 struct v3_dev_net_ops * net_ops;
107 struct virtio_dev_state * virtio_dev;
108 struct list_head dev_link;
110 ulong_t pkt_sent, pkt_recv, pkt_drop;
114 #ifdef CONFIG_DEBUG_VIRTIO_NET
116 static void print_packet(uchar_t *pkt, int size) {
117 PrintDebug("Virtio Nic: print_data_packet: size: %d\n", size);
118 v3_hexdump(pkt, size, NULL, 0);
124 //Temporarly for debug
126 static struct virtio_net_state *temp_net_states[3];
127 static int net_idx = 0;
129 static int __virtio_dev_send(uchar_t * buf, uint32_t size, void *private_data);
131 static int send(uint8_t * buf, uint32_t count, void * private_data, struct vm_device *dest_dev)
133 PrintDebug("Virito NIC: In sending stub, guest %p, count %d\n", private_data, count);
135 #ifdef CONFIG_DEBUG_VIRTIO_NET
136 print_packet(buf, 20);
139 struct virtio_net_state *virtio_state = (struct virtio_net_state *)private_data;
141 if (virtio_state == temp_net_states[0])
142 __virtio_dev_send(buf, count, temp_net_states[1]);
144 if (virtio_state == temp_net_states[1]){ //return a RARP packet
145 __virtio_dev_send(buf, count, temp_net_states[0]);
151 static int receive(uint8_t * buf, uint32_t count, void * private_data, struct vm_device *src_dev)
153 PrintDebug("Virito NIC: In receiveing stub\n");
160 static int virtio_free(struct vm_device * dev)
166 static int virtio_reset(struct virtio_net_state * virtio)
168 virtio->rx_vq.ring_desc_addr = 0;
169 virtio->rx_vq.ring_avail_addr = 0;
170 virtio->rx_vq.ring_used_addr = 0;
171 virtio->rx_vq.pfn = 0;
172 virtio->rx_vq.cur_avail_idx = 0;
174 virtio->tx_vq.ring_desc_addr = 0;
175 virtio->tx_vq.ring_avail_addr = 0;
176 virtio->tx_vq.ring_used_addr = 0;
177 virtio->tx_vq.pfn = 0;
178 virtio->tx_vq.cur_avail_idx = 0;
180 virtio->ctrl_vq.ring_desc_addr = 0;
181 virtio->ctrl_vq.ring_avail_addr = 0;
182 virtio->ctrl_vq.ring_used_addr = 0;
183 virtio->ctrl_vq.pfn = 0;
184 virtio->ctrl_vq.cur_avail_idx = 0;
186 virtio->virtio_cfg.host_features = 0;
187 //virtio->virtio_cfg.status = VIRTIO_NET_S_LINK_UP;
188 virtio->virtio_cfg.pci_isr = 0;
194 //sending guest's packet to network sink
195 static int pkt_write(struct virtio_net_state * virtio, struct vring_desc * buf_desc)
197 //struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
198 uint8_t * buf = NULL;
199 uint32_t len = buf_desc->length;
201 PrintDebug("Virtio NIC: Handling Virtio Write, net_state: %p\n", virtio);
203 if (guest_pa_to_host_va(virtio->virtio_dev->vm, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
204 PrintError("Could not translate buffer address\n");
208 PrintDebug("Length=%d\n", buf_desc->length);
209 //PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d, buf address: %p, send address: %p\n", buf_desc,
210 //(void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next, buf, virtio->net_ops->send);
212 if (virtio->net_ops->send(buf, len, (void *)virtio, NULL) == -1) {
220 static int build_receive_header(struct virtio_net_hdr * hdr, const void * buf, int raw) {
224 memcpy(hdr, buf, sizeof(struct virtio_net_hdr));
226 memset(hdr, 0, sizeof(struct virtio_net_hdr));
233 //sending guest's packet to network sink
234 static int copy_data_to_desc(struct virtio_net_state * virtio_state, struct vring_desc * desc, uchar_t * buf, uint_t buf_len)
237 uint8_t * desc_buf = NULL;
239 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
240 PrintError("Could not translate buffer address\n");
244 len = (desc->length < buf_len)?desc->length:buf_len;
245 memcpy(desc_buf, buf, len);
252 static int send_pkt_to_guest(struct virtio_net_state * virtio, uchar_t * buf, uint_t size, int raw, void * private_data)
254 struct virtio_queue * q = &(virtio->rx_vq);
255 struct virtio_net_hdr hdr;
256 uint32_t hdr_len = sizeof(struct virtio_net_hdr);
257 uint32_t data_len = size;
260 PrintDebug("VIRTIO NIC: sending packet to virtio nic %p, size:%d", virtio, size);
268 build_receive_header(&hdr, buf, 1);
270 //queue is not set yet
271 if (q->ring_avail_addr == 0) {
272 PrintError("Queue is not set\n");
276 if (q->last_avail_idx > q->avail->index)
277 q->idx_overflow = true;
278 q->last_avail_idx = q->avail->index;
280 if (q->cur_avail_idx < q->avail->index || (q->idx_overflow && q->cur_avail_idx < q->avail->index+65536)){
282 uint16_t hdr_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
283 uint16_t buf_idx = 0;
284 struct vring_desc * hdr_desc = NULL;
286 hdr_desc = &(q->desc[hdr_idx]);
287 if (guest_pa_to_host_va(virtio->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
288 PrintError("Could not translate receive buffer address\n");
292 memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr));
294 if (offset >= data_len) {
295 hdr_desc->flags &= ~VIRTIO_NEXT_FLAG;
298 for (buf_idx = hdr_desc->next; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
299 struct vring_desc * buf_desc = &(q->desc[buf_idx]);
302 len = copy_data_to_desc(virtio, buf_desc, buf + offset, data_len - offset);
306 if (offset < data_len) {
307 buf_desc->flags = VIRTIO_NEXT_FLAG;
310 buf_desc->length = len; // TODO: do we need this?
313 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
314 q->used->ring[q->used->index % q->queue_size].length = data_len + hdr_len; // This should be the total length of data sent to guest (header+pkt_data)
318 int last_idx = q->cur_avail_idx;
320 if (q->cur_avail_idx < last_idx)
321 q->idx_overflow = false;
325 #ifdef VIRTIO_NIC_PROFILE
326 PrintError("Virtio NIC: %p, one pkt dropped receieved: %ld, dropped: %ld, sent: %ld curidx: %d, avaiIdx: %d\n", virtio, virtio->pkt_recv, virtio->pkt_drop, virtio->pkt_sent, q->cur_avail_idx, q->avail->index);
330 #ifdef VIRTIO_NIC_PROFILE
331 if ((virtio->pkt_recv % 10000) == 0){
332 PrintError("Virtio NIC: %p, receieved: %ld, dropped: %ld, sent: %ld curidx: %d, avaiIdx: %d\n", virtio, virtio->pkt_recv, virtio->pkt_drop, virtio->pkt_sent, q->cur_avail_idx, q->avail->index);
336 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
337 PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
338 v3_pci_raise_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
339 virtio->virtio_cfg.pci_isr = 0x1;
347 int virtio_send(struct guest_info * vm, char *dev_name, uchar_t * buf, uint_t size) {
348 struct vm_device * virtio_dev = v3_find_dev(vm, dev_name);
350 // TODO: how to get virtio net state from device??
351 // this is not right now
352 struct virtio_net_state * virtio_state = (struct virtio_net_state *)virtio_dev->private_data;
354 return send_pkt_to_guest(virtio_state, buf, size, 1, NULL);
358 static int __virtio_dev_send(uchar_t * buf, uint32_t size, void *private_data) {
359 struct virtio_net_state *virtio_state = (struct virtio_net_state *)private_data;
361 return send_pkt_to_guest(virtio_state, buf, size, 1, NULL);
364 static int get_desc_count(struct virtio_queue * q, int index) {
365 struct vring_desc * tmp_desc = &(q->desc[index]);
368 while (tmp_desc->flags & VIRTIO_NEXT_FLAG) {
369 tmp_desc = &(q->desc[tmp_desc->next]);
377 static int handle_ctrl(struct virtio_net_state * dev) {
381 //get packet from guest
382 static int handle_pkt_tx(struct virtio_net_state * virtio_state)
384 struct virtio_queue * q = &(virtio_state->tx_vq);
385 struct virtio_net_hdr * hdr = NULL;
387 virtio_state->pkt_sent ++;
389 if (q->avail->index < q->last_avail_idx)
390 q->idx_overflow = true;
391 q->last_avail_idx = q->avail->index;
393 #ifdef VIRTIO_NIC_PROFILE
394 if(virtio_state->pkt_sent % 10000 == 0)
395 PrintError("Virtio NIC: %p, pkt_sent: %ld curidx: %d, avaiIdx: %d\n", virtio_state, virtio_state->pkt_sent, q->cur_avail_idx, q->avail->index);
398 while (q->cur_avail_idx < q->avail->index ||(q->idx_overflow && q->cur_avail_idx < (q->avail->index + 65536))) {
399 struct vring_desc * hdr_desc = NULL;
401 uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
402 int desc_cnt = get_desc_count(q, desc_idx);
403 uint32_t req_len = 0;
406 hdr_desc = &(q->desc[desc_idx]);
407 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
408 PrintError("Could not translate block header address\n");
412 hdr = (struct virtio_net_hdr*)hdr_addr;
413 desc_idx = hdr_desc->next;
415 for (i = 0; i < desc_cnt - 1; i++) {
416 struct vring_desc * buf_desc = &(q->desc[desc_idx]);
417 if (pkt_write(virtio_state, buf_desc) == -1) {
418 PrintError("Error handling nic operation\n");
422 req_len += buf_desc->length;
423 desc_idx = buf_desc->next;
426 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
427 q->used->ring[q->used->index % q->queue_size].length = req_len; // What do we set this to????
431 int last_idx = q->cur_avail_idx;
433 if (q->cur_avail_idx < last_idx)
434 q->idx_overflow = false;
437 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
438 v3_pci_raise_irq(virtio_state->virtio_dev->pci_bus, 0, virtio_state->pci_dev);
439 virtio_state->virtio_cfg.pci_isr = 0x1;
446 static int virtio_setup_queue(struct virtio_net_state * virtio_state, struct virtio_queue * queue, addr_t pfn, addr_t page_addr) {
449 queue->ring_desc_addr = page_addr;
450 queue->ring_avail_addr = page_addr + (queue->queue_size * sizeof(struct vring_desc));
451 queue->ring_used_addr = ((queue->ring_avail_addr) +
452 (sizeof(struct vring_avail)) +
453 (queue->queue_size * sizeof(uint16_t)));
455 // round up to next page boundary.
456 queue->ring_used_addr = (queue->ring_used_addr + 0xfff) & ~0xfff;
458 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_desc_addr, (addr_t *)&(queue->desc)) == -1) {
459 PrintError("Could not translate ring descriptor address\n");
464 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_avail_addr, (addr_t *)&(queue->avail)) == -1) {
465 PrintError("Could not translate ring available address\n");
470 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_used_addr, (addr_t *)&(queue->used)) == -1) {
471 PrintError("Could not translate ring used address\n");
475 PrintDebug("RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
476 (void *)(queue->ring_desc_addr),
477 (void *)(queue->ring_avail_addr),
478 (void *)(queue->ring_used_addr));
480 PrintDebug("RingDesc=%p, Avail=%p, Used=%p\n",
481 queue->desc, queue->avail, queue->used);
488 static int virtio_io_write(uint16_t port, void * src, uint_t length, void * private_data)
490 //struct vm_device * dev = (struct vm_device *)private_data;
491 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
492 int port_idx = port % virtio->io_range_size;
495 PrintDebug("VIRTIO NIC %p Write for port %d (index=%d) len=%d, value=%x\n", private_data,
496 port, port_idx, length, *(uint32_t *)src);
500 case GUEST_FEATURES_PORT:
502 PrintError("Illegal write length for guest features\n");
506 virtio->virtio_cfg.guest_features = *(uint32_t *)src;
507 PrintDebug("Setting Guest Features to %x\n", virtio->virtio_cfg.guest_features);
510 case VRING_PG_NUM_PORT:
513 PrintError("Illegal write length for page frame number\n");
517 addr_t pfn = *(uint32_t *)src;
518 addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
519 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
523 virtio_setup_queue(virtio, &virtio->rx_vq, pfn, page_addr);
526 virtio_setup_queue(virtio, &virtio->tx_vq, pfn, page_addr);
529 virtio_setup_queue(virtio, &virtio->ctrl_vq, pfn, page_addr);
537 case VRING_Q_SEL_PORT:
538 virtio->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
540 if (virtio->virtio_cfg.vring_queue_selector > 2) {
541 PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
542 virtio->virtio_cfg.vring_queue_selector);
547 case VRING_Q_NOTIFY_PORT:
549 uint16_t queue_idx = *(uint16_t *)src;
551 //PrintDebug("Handling Kick\n");
554 PrintDebug("receive queue notification 0, packet get by Guest\n");
555 } else if (queue_idx == 1){
556 if (handle_pkt_tx(virtio) == -1) {
557 PrintError("Could not handle NIC Notification\n");
560 } else if (queue_idx == 2){
561 if (handle_ctrl(virtio) == -1) {
562 PrintError("Could not handle NIC Notification\n");
566 PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
572 case VIRTIO_STATUS_PORT:
573 virtio->virtio_cfg.status = *(uint8_t *)src;
575 if (virtio->virtio_cfg.status == 0) {
576 PrintDebug("Resetting device\n");
577 virtio_reset(virtio);
582 case VIRTIO_ISR_PORT:
583 virtio->virtio_cfg.pci_isr = *(uint8_t *)src;
594 static int virtio_io_read(uint16_t port, void * dst, uint_t length, void * private_data)
596 //struct vm_device * dev = (struct vm_device *)private_data;
597 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
598 int port_idx = port % virtio->io_range_size;
599 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
601 PrintDebug("Virtio NIC %p: Read for port %d (index =%d), length=%d", private_data,
602 port, port_idx, length);
605 case HOST_FEATURES_PORT:
607 PrintError("Illegal read length for host features\n");
611 *(uint32_t *)dst = virtio->virtio_cfg.host_features;
613 PrintDebug("value=0x%x\n", *(uint32_t *)dst);
616 case VRING_PG_NUM_PORT:
619 PrintError("Illegal read length for page frame number\n");
625 *(uint32_t *)dst = virtio->rx_vq.pfn;
628 *(uint32_t *)dst = virtio->tx_vq.pfn;
631 *(uint32_t *)dst = virtio->ctrl_vq.pfn;
637 PrintDebug(", value=0x%x\n", *(uint32_t *)dst);
640 case VRING_SIZE_PORT:
643 PrintError("Illegal read length for vring size\n");
649 *(uint16_t *)dst = virtio->rx_vq.queue_size;
652 *(uint16_t *)dst = virtio->tx_vq.queue_size;
655 *(uint16_t *)dst = virtio->ctrl_vq.queue_size;
661 PrintDebug("queue index: %d, value=0x%x\n", (int)queue_idx, *(uint16_t *)dst);
664 case VIRTIO_STATUS_PORT:
667 PrintError("Illegal read length for status\n");
671 *(uint8_t *)dst = virtio->virtio_cfg.status;
673 PrintDebug(", value=0x%x\n", *(uint8_t *)dst);
676 case VIRTIO_ISR_PORT:
677 *(uint8_t *)dst = virtio->virtio_cfg.pci_isr;
678 virtio->virtio_cfg.pci_isr = 0;
679 v3_pci_lower_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
681 PrintDebug(", value=0x%x\n", *(uint8_t *)dst);
686 PrintError("Virtio NIC: Read of Unhandled Virtio Read\n");
694 static struct v3_device_ops dev_ops = {
702 static int register_dev(struct virtio_dev_state * virtio, struct virtio_net_state * net_state)
704 struct pci_device * pci_dev = NULL;
705 struct v3_pci_bar bars[6];
706 int num_ports = sizeof(struct virtio_config);
707 int tmp_ports = num_ports;
710 // This gets the number of ports, rounded up to a power of 2
711 net_state->io_range_size = 1; // must be a power of 2
713 while (tmp_ports > 0) {
715 net_state->io_range_size <<= 1;
718 // this is to account for any low order bits being set in num_ports
719 // if there are none, then num_ports was already a power of 2 so we shift right to reset it
720 if ((num_ports & ((net_state->io_range_size >> 1) - 1)) == 0) {
721 net_state->io_range_size >>= 1;
725 for (i = 0; i < 6; i++) {
726 bars[i].type = PCI_BAR_NONE;
729 PrintDebug("Virtio-NIC io_range_size = %d\n", net_state->io_range_size);
731 bars[0].type = PCI_BAR_IO;
732 bars[0].default_base_port = -1;
733 bars[0].num_ports = net_state->io_range_size;
735 bars[0].io_read = virtio_io_read;
736 bars[0].io_write = virtio_io_write;
737 bars[0].private_data = net_state;
739 pci_dev = v3_pci_register_device(virtio->pci_bus, PCI_STD_DEVICE,
740 0, PCI_AUTO_DEV_NUM, 0,
741 "LNX_VIRTIO_NIC", bars,
742 NULL, NULL, NULL, net_state);
745 PrintError("Virtio NIC: Could not register PCI Device\n");
749 PrintDebug("Virtio NIC: registered to PCI bus\n");
751 pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
752 pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
755 pci_dev->config_header.device_id = VIRTIO_NET_DEV_ID;
756 pci_dev->config_header.class = PCI_CLASS_NETWORK;
757 pci_dev->config_header.subclass = PCI_NET_SUBCLASS_OTHER;
759 pci_dev->config_header.subsystem_id = VIRTIO_NET_SUBDEVICE_ID;;
761 pci_dev->config_header.intr_pin = 1;
763 pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
766 net_state->pci_dev = pci_dev;
767 //net_state->pci_bus = pci_bus;
769 net_state->virtio_cfg.host_features = 0; //no features support now
771 net_state->rx_vq.queue_size = QUEUE_SIZE;
772 net_state->tx_vq.queue_size = QUEUE_SIZE;
773 net_state->ctrl_vq.queue_size = CTRL_QUEUE_SIZE;
775 net_state->virtio_dev = virtio;
776 net_state->pkt_sent = net_state->pkt_recv = net_state->pkt_drop = 0;
778 virtio_reset(net_state);
785 static int connect_fn(struct guest_info * info,
786 void * frontend_data,
787 struct v3_dev_net_ops * ops,
789 void * private_data) {
790 struct virtio_dev_state * virtio = (struct virtio_dev_state *)frontend_data;
791 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
793 memset(net_state, 0, sizeof(struct virtio_net_state));
795 register_dev(virtio, net_state);
797 net_state->net_ops = ops;
798 net_state->backend_data = private_data;
804 //temporary interface between Virtio-NIC and Vnet
805 //Treat vnet as backend, and virtio nic as frontend
807 //used when virtio_nic get a packet from guest and send it to the backend
808 // send packet to all of the virtio nic devices other than the sender
809 static int vnet_send(uint8_t * buf, uint32_t len, void * private_data, struct vm_device *dest_dev){
811 PrintDebug("Virito NIC: In vnet_send: guest net state %p\n", private_data);
813 #ifdef CONFIG_DEBUG_VIRTIO_NET
814 print_packet(buf, len);
817 v3_vnet_send_rawpkt(buf, len, private_data);
821 //used to send packet to guest by a virtio nic
822 static int vnet_receive(uint8_t * buf, uint32_t count, void * private_data, struct vm_device *src_dev){
827 static int virtio_input(uchar_t * buf, uint_t len, void * private_data){
828 PrintDebug("Virito NIC: In virtio_input: guest net state %p\n", private_data);
830 #ifdef CONFIG_DEBUG_VIRTIO_NET
831 print_packet(buf, len);
834 return __virtio_dev_send(buf, len, private_data);
838 //register a virtio device to the vnet as backend
839 void register_virtio_to_vnet(struct vm_device *dev,
842 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
843 memset(net_state, 0, sizeof(struct virtio_net_state));
845 struct virtio_dev_state *virtio_state = (struct virtio_dev_state *)dev->private_data;
847 net_state->net_ops = (struct v3_dev_net_ops *)V3_Malloc(sizeof(struct v3_dev_net_ops));
849 net_state->net_ops->send = &vnet_send;
850 net_state->net_ops->receive = &vnet_receive;
852 register_dev(virtio_state, net_state);
854 PrintDebug("Virtio NIC After register Device %s: queue size: %d, %d\n", dev->name,
855 net_state->rx_vq.queue_size, net_state->tx_vq.queue_size);
857 PrintDebug("VNET: connect virtio nic state %p to vnet\n", net_state);
859 //add a device link to link table
860 int idx = vnet_register_device(dev, dev_name, mac, &virtio_input, net_state);
862 uchar_t srcmac[6] = {0x00,0x02,0x55,0x67,0x42,0x39};
863 uchar_t dstmac[6] = {0xff,0xff,0xff,0xff,0xff,0xff};
864 uchar_t zeromac[6] = {0,0,0,0,0,0};
866 vnet_add_route_entry(zeromac, dstmac, MAC_ANY, MAC_NONE, idx, LINK_INTERFACE, -1, LINK_INTERFACE);
868 vnet_add_route_entry(zeromac, srcmac, MAC_ANY, MAC_NONE, idx, LINK_INTERFACE, -1, LINK_INTERFACE);
870 vnet_add_route_entry(srcmac, zeromac, MAC_NONE, MAC_ANY, idx, LINK_INTERFACE, -1, LINK_INTERFACE);
876 static int virtio_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
877 struct vm_device * pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
878 struct virtio_dev_state * virtio_state = NULL;
879 char * name = v3_cfg_val(cfg, "name");
881 PrintDebug("Virtio NIC: Initializing VIRTIO Network device: %s\n", name);
883 if (pci_bus == NULL) {
884 PrintError("Virtio NIC: VirtIO devices require a PCI Bus");
888 virtio_state = (struct virtio_dev_state *)V3_Malloc(sizeof(struct virtio_dev_state));
889 memset(virtio_state, 0, sizeof(struct virtio_dev_state));
891 INIT_LIST_HEAD(&(virtio_state->dev_list));
892 virtio_state->pci_bus = pci_bus;
893 virtio_state->vm = vm;
895 struct vm_device * dev = v3_allocate_device(name, &dev_ops, virtio_state);
896 if (v3_attach_device(vm, dev) == -1) {
897 PrintError("Virtio NIC: Could not attach device %s\n", name);
901 if (v3_dev_add_net_frontend(vm, name, connect_fn, (void *)virtio_state) == -1) {
902 PrintError("Virtio NIC: Could not register %s as net frontend\n", name);
907 //for temporary testing, add a backend
910 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
911 memset(net_state, 0, sizeof(struct virtio_net_state));
913 net_state->net_ops = (struct v3_dev_net_ops *)V3_Malloc(sizeof(struct v3_dev_net_ops));
915 net_state->net_ops->send = &send;
916 net_state->net_ops->receive = &receive;
918 register_dev(virtio_state, net_state);
920 PrintDebug("Virtio NIC After register Device %s: queue size: %d, %d\n", dev->name,
921 net_state->rx_vq.queue_size, net_state->tx_vq.queue_size);
923 temp_net_states[net_idx ++] = net_state;
925 PrintDebug("Net_states: 0: %p, 1: %p, 2: %p\n", temp_net_states[0], temp_net_states[1], temp_net_states[2]);
929 #if 1 //test interface between vnet & virtio-nic
931 uchar_t mac[6] = {0,0,0,0,0,0};
932 register_virtio_to_vnet(dev, name,mac);
939 device_register("LNX_VIRTIO_NIC", virtio_init)