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, Cui Zheng <cuizheng@cs.unm.edu>
13 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
14 * All rights reserved.
16 * Author: Jack Lange <jarusl@cs.northwestern.edu>
17 * Lei Xia <lxia@northwestern.edu>
18 * Cui Zheng <cuizheng@cs.unm.edu>
21 * This is free software. You are permitted to use,
22 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
25 #include <palacios/vmm.h>
26 #include <palacios/vmm_dev_mgr.h>
27 #include <devices/lnx_virtio_pci.h>
28 #include <palacios/vm_guest_mem.h>
29 #include <palacios/vmm_sprintf.h>
30 #include <palacios/vmm_vnet.h>
32 #include <devices/pci.h>
35 #ifndef CONFIG_DEBUG_VIRTIO_NET
37 #define PrintDebug(fmt, args...)
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 1024
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;
112 #ifdef CONFIG_DEBUG_VIRTIO_NET
114 static void print_packet(uchar_t *pkt, int size) {
115 PrintDebug("Virtio Nic: print_data_packet: size: %d\n", size);
116 v3_hexdump(pkt, size, NULL, 0);
122 //Temporarly for debug
124 static struct virtio_net_state *temp_net_states[3];
125 static int net_idx = 0;
127 static int __virtio_dev_send(uchar_t * buf, uint32_t size, void *private_data);
129 static int send(uint8_t * buf, uint32_t count, void * private_data, struct vm_device *dest_dev)
131 PrintDebug("Virito NIC: In sending stub, guest %p, count %d\n", private_data, count);
133 #ifdef CONFIG_DEBUG_VIRTIO_NET
134 print_packet(buf, 20);
137 struct virtio_net_state *virtio_state = (struct virtio_net_state *)private_data;
139 if (virtio_state == temp_net_states[0])
140 __virtio_dev_send(buf, count, temp_net_states[1]);
142 if (virtio_state == temp_net_states[1]){ //return a RARP packet
143 __virtio_dev_send(buf, count, temp_net_states[0]);
149 static int receive(uint8_t * buf, uint32_t count, void * private_data, struct vm_device *src_dev)
151 PrintDebug("Virito NIC: In receiveing stub\n");
158 static int virtio_free(struct vm_device * dev)
164 static int virtio_reset(struct virtio_net_state * virtio)
166 virtio->rx_vq.ring_desc_addr = 0;
167 virtio->rx_vq.ring_avail_addr = 0;
168 virtio->rx_vq.ring_used_addr = 0;
169 virtio->rx_vq.pfn = 0;
170 virtio->rx_vq.cur_avail_idx = 0;
172 virtio->tx_vq.ring_desc_addr = 0;
173 virtio->tx_vq.ring_avail_addr = 0;
174 virtio->tx_vq.ring_used_addr = 0;
175 virtio->tx_vq.pfn = 0;
176 virtio->tx_vq.cur_avail_idx = 0;
178 virtio->ctrl_vq.ring_desc_addr = 0;
179 virtio->ctrl_vq.ring_avail_addr = 0;
180 virtio->ctrl_vq.ring_used_addr = 0;
181 virtio->ctrl_vq.pfn = 0;
182 virtio->ctrl_vq.cur_avail_idx = 0;
184 virtio->virtio_cfg.host_features = 0;
185 //virtio->virtio_cfg.status = VIRTIO_NET_S_LINK_UP;
186 virtio->virtio_cfg.pci_isr = 0;
192 //sending guest's packet to network sink
193 static int pkt_write(struct virtio_net_state * virtio, struct vring_desc * buf_desc)
195 //struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
196 uint8_t * buf = NULL;
197 uint32_t len = buf_desc->length;
199 PrintDebug("Virtio NIC: Handling Virtio Write, net_state: %p\n", virtio);
201 if (guest_pa_to_host_va(virtio->virtio_dev->vm, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
202 PrintError("Could not translate buffer address\n");
206 PrintDebug("Length=%d\n", buf_desc->length);
207 //PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d, buf address: %p, send address: %p\n", buf_desc,
208 //(void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next, buf, virtio->net_ops->send);
210 if (virtio->net_ops->send(buf, len, (void *)virtio, NULL) == -1) {
218 static int build_receive_header(struct virtio_net_hdr * hdr, const void * buf, int raw) {
222 memcpy(hdr, buf, sizeof(struct virtio_net_hdr));
224 memset(hdr, 0, sizeof(struct virtio_net_hdr));
231 //sending guest's packet to network sink
232 static int copy_data_to_desc(struct virtio_net_state * virtio_state, struct vring_desc * desc, uchar_t * buf, uint_t buf_len)
235 uint8_t * desc_buf = NULL;
237 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
238 PrintError("Could not translate buffer address\n");
242 len = (desc->length < buf_len)?desc->length:buf_len;
243 memcpy(desc_buf, buf, len);
250 static int send_pkt_to_guest(struct virtio_net_state * virtio, uchar_t * buf, uint_t size, int raw, void * private_data)
252 struct virtio_queue * q = &(virtio->rx_vq);
253 struct virtio_net_hdr hdr;
254 uint32_t hdr_len = sizeof(struct virtio_net_hdr);
255 uint32_t data_len = size;
258 //PrintDebug("VIRTIO NIC: Handle RX: cur_index=%d (mod=%d), avail_index=%d\n",
259 //q->cur_avail_idx, q->cur_avail_idx % q->queue_size, q->avail->index);
261 PrintError("VIRTIO NIC: sending packet to net_state %p, size:%d", virtio, size);
267 build_receive_header(&hdr, buf, 1);
269 //queue is not set yet
270 if (q->ring_avail_addr == 0) {
271 PrintError("Queue is not set\n");
275 if (q->cur_avail_idx < q->avail->index) {
277 uint16_t hdr_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
278 uint16_t buf_idx = 0;
279 struct vring_desc * hdr_desc = NULL;
281 //PrintDebug("Descriptor index=%d\n", q->cur_avail_idx % q->queue_size);
283 hdr_desc = &(q->desc[hdr_idx]);
285 //PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
286 //(void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
288 if (guest_pa_to_host_va(virtio->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
289 PrintError("Could not translate receive buffer address\n");
293 //copy header to the header descriptor
294 memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr));
296 //Zheng 01/02/2010: zero payload
297 if (offset >= data_len) {
298 hdr_desc->flags &= ~VIRTIO_NEXT_FLAG;
301 //copy data to the next descriptors
302 //Zheng 01/02/2010: put data into the next descriptor, rather than 0!
303 for (buf_idx = hdr_desc->next; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
304 // for (buf_idx = 0; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
305 struct vring_desc * buf_desc = &(q->desc[buf_idx]);
308 //Zheng 01/02/2010: commented this - we need to check
309 // if there still is some data left
310 //buf_desc->flags = VIRTIO_NEXT_FLAG;
312 //PrintError("JACK: copying packet to up desc (len = %d)\n", data_len - offset);
313 //v3_hexdump(buf + offset, data_len - offset, NULL, 0);
315 len = copy_data_to_desc(virtio, buf_desc, buf + offset, data_len - offset);
319 //Zheng 01/02/2010: check if there still is some data left
320 if (offset < data_len) {
321 buf_desc->flags = VIRTIO_NEXT_FLAG;
324 buf_desc->length = len; // TODO: do we need this?
325 //PrintError("JACK: setting buffer descriptor length to %d)\n", buf_desc->length);
329 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
330 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)
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_net_state *virtio = (struct virtio_net_state *)dev->private_data;
385 struct virtio_queue * q = &(virtio_state->tx_vq);
387 //PrintDebug("VIRTIO NIC pkt_tx: cur_index=%d (mod=%d), avail_index=%d\n",
388 // q->cur_avail_idx, q->cur_avail_idx % q->queue_size, q->avail->index);
390 struct virtio_net_hdr * hdr = NULL;
392 while (q->cur_avail_idx < q->avail->index) {
393 struct vring_desc * hdr_desc = NULL;
395 uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
396 int desc_cnt = get_desc_count(q, desc_idx);
397 uint32_t req_len = 0;
400 //PrintDebug("Descriptor Count=%d, index=%d\n", desc_cnt, q->cur_avail_idx % q->queue_size);
402 hdr_desc = &(q->desc[desc_idx]);
404 //PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
405 //(void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
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;
414 //PrintDebug("NIC Op Hdr (ptr=%p) header len =%x\n", (void *)hdr_addr, (int)hdr->hdr_len);
416 desc_idx = hdr_desc->next;
418 for (i = 0; i < desc_cnt - 1; i++) {
419 struct vring_desc * buf_desc = &(q->desc[desc_idx]);
421 //PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", buf_desc,
422 //(void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next);
424 if (pkt_write(virtio_state, buf_desc) == -1) {
425 PrintError("Error handling nic operation\n");
429 req_len += buf_desc->length;
430 desc_idx = buf_desc->next;
433 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
434 q->used->ring[q->used->index % q->queue_size].length = req_len; // What do we set this to????
440 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
441 //PrintDebug("Raising IRQ %d\n", virtio_state->pci_dev->config_header.intr_line);
442 v3_pci_raise_irq(virtio_state->virtio_dev->pci_bus, 0, virtio_state->pci_dev);
443 virtio_state->virtio_cfg.pci_isr = 0x1;
450 static int virtio_setup_queue(struct virtio_net_state * virtio_state, struct virtio_queue * queue, addr_t pfn, addr_t page_addr) {
453 queue->ring_desc_addr = page_addr;
454 queue->ring_avail_addr = page_addr + (queue->queue_size * sizeof(struct vring_desc));
455 queue->ring_used_addr = ((queue->ring_avail_addr) +
456 (sizeof(struct vring_avail)) +
457 (queue->queue_size * sizeof(uint16_t)));
459 // round up to next page boundary.
460 queue->ring_used_addr = (queue->ring_used_addr + 0xfff) & ~0xfff;
462 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_desc_addr, (addr_t *)&(queue->desc)) == -1) {
463 PrintError("Could not translate ring descriptor address\n");
468 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_avail_addr, (addr_t *)&(queue->avail)) == -1) {
469 PrintError("Could not translate ring available address\n");
474 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_used_addr, (addr_t *)&(queue->used)) == -1) {
475 PrintError("Could not translate ring used address\n");
479 PrintDebug("RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
480 (void *)(queue->ring_desc_addr),
481 (void *)(queue->ring_avail_addr),
482 (void *)(queue->ring_used_addr));
484 PrintDebug("RingDesc=%p, Avail=%p, Used=%p\n",
485 queue->desc, queue->avail, queue->used);
492 static int virtio_io_write(uint16_t port, void * src, uint_t length, void * private_data)
494 //struct vm_device * dev = (struct vm_device *)private_data;
495 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
496 int port_idx = port % virtio->io_range_size;
499 PrintDebug("VIRTIO NIC %p Write for port %d (index=%d) len=%d, value=%x\n", private_data,
500 port, port_idx, length, *(uint32_t *)src);
504 case GUEST_FEATURES_PORT:
506 PrintError("Illegal write length for guest features\n");
510 virtio->virtio_cfg.guest_features = *(uint32_t *)src;
511 PrintDebug("Setting Guest Features to %x\n", virtio->virtio_cfg.guest_features);
514 case VRING_PG_NUM_PORT:
517 PrintError("Illegal write length for page frame number\n");
521 addr_t pfn = *(uint32_t *)src;
522 addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
523 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
527 virtio_setup_queue(virtio, &virtio->rx_vq, pfn, page_addr);
530 virtio_setup_queue(virtio, &virtio->tx_vq, pfn, page_addr);
533 virtio_setup_queue(virtio, &virtio->ctrl_vq, pfn, page_addr);
541 case VRING_Q_SEL_PORT:
542 virtio->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
544 if (virtio->virtio_cfg.vring_queue_selector > 2) {
545 PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
546 virtio->virtio_cfg.vring_queue_selector);
551 case VRING_Q_NOTIFY_PORT:
553 uint16_t queue_idx = *(uint16_t *)src;
555 //PrintDebug("Handling Kick\n");
558 PrintDebug("receive queue notification 0, packet get by Guest\n");
559 } else if (queue_idx == 1){
560 if (handle_pkt_tx(virtio) == -1) {
561 PrintError("Could not handle NIC Notification\n");
564 } else if (queue_idx == 2){
565 if (handle_ctrl(virtio) == -1) {
566 PrintError("Could not handle NIC Notification\n");
570 PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
576 case VIRTIO_STATUS_PORT:
577 virtio->virtio_cfg.status = *(uint8_t *)src;
579 if (virtio->virtio_cfg.status == 0) {
580 PrintDebug("Resetting device\n");
581 virtio_reset(virtio);
586 case VIRTIO_ISR_PORT:
587 virtio->virtio_cfg.pci_isr = *(uint8_t *)src;
598 static int virtio_io_read(uint16_t port, void * dst, uint_t length, void * private_data)
600 //struct vm_device * dev = (struct vm_device *)private_data;
601 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
602 int port_idx = port % virtio->io_range_size;
603 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
605 PrintDebug("Virtio NIC %p: Read for port %d (index =%d), length=%d", private_data,
606 port, port_idx, length);
609 case HOST_FEATURES_PORT:
611 PrintError("Illegal read length for host features\n");
615 *(uint32_t *)dst = virtio->virtio_cfg.host_features;
617 PrintDebug("value=0x%x\n", *(uint32_t *)dst);
620 case VRING_PG_NUM_PORT:
623 PrintError("Illegal read length for page frame number\n");
629 *(uint32_t *)dst = virtio->rx_vq.pfn;
632 *(uint32_t *)dst = virtio->tx_vq.pfn;
635 *(uint32_t *)dst = virtio->ctrl_vq.pfn;
641 PrintDebug(", value=0x%x\n", *(uint32_t *)dst);
644 case VRING_SIZE_PORT:
647 PrintError("Illegal read length for vring size\n");
653 *(uint16_t *)dst = virtio->rx_vq.queue_size;
656 *(uint16_t *)dst = virtio->tx_vq.queue_size;
659 *(uint16_t *)dst = virtio->ctrl_vq.queue_size;
665 PrintDebug("queue index: %d, value=0x%x\n", (int)queue_idx, *(uint16_t *)dst);
668 case VIRTIO_STATUS_PORT:
671 PrintError("Illegal read length for status\n");
675 *(uint8_t *)dst = virtio->virtio_cfg.status;
677 PrintDebug(", value=0x%x\n", *(uint8_t *)dst);
680 case VIRTIO_ISR_PORT:
681 *(uint8_t *)dst = virtio->virtio_cfg.pci_isr;
682 virtio->virtio_cfg.pci_isr = 0;
683 v3_pci_lower_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
685 PrintDebug(", value=0x%x\n", *(uint8_t *)dst);
690 PrintError("Virtio NIC: Read of Unhandled Virtio Read\n");
698 static struct v3_device_ops dev_ops = {
706 static int register_dev(struct virtio_dev_state * virtio, struct virtio_net_state * net_state)
708 struct pci_device * pci_dev = NULL;
709 struct v3_pci_bar bars[6];
710 int num_ports = sizeof(struct virtio_config);
711 int tmp_ports = num_ports;
714 // This gets the number of ports, rounded up to a power of 2
715 net_state->io_range_size = 1; // must be a power of 2
717 while (tmp_ports > 0) {
719 net_state->io_range_size <<= 1;
722 // this is to account for any low order bits being set in num_ports
723 // if there are none, then num_ports was already a power of 2 so we shift right to reset it
724 if ((num_ports & ((net_state->io_range_size >> 1) - 1)) == 0) {
725 net_state->io_range_size >>= 1;
729 for (i = 0; i < 6; i++) {
730 bars[i].type = PCI_BAR_NONE;
733 PrintDebug("Virtio-NIC io_range_size = %d\n", net_state->io_range_size);
735 bars[0].type = PCI_BAR_IO;
736 bars[0].default_base_port = -1;
737 bars[0].num_ports = net_state->io_range_size;
739 bars[0].io_read = virtio_io_read;
740 bars[0].io_write = virtio_io_write;
741 bars[0].private_data = net_state;
743 pci_dev = v3_pci_register_device(virtio->pci_bus, PCI_STD_DEVICE,
744 0, PCI_AUTO_DEV_NUM, 0,
745 "LNX_VIRTIO_NIC", bars,
746 NULL, NULL, NULL, net_state);
749 PrintError("Virtio NIC: Could not register PCI Device\n");
753 PrintDebug("Virtio NIC: registered to PCI bus\n");
755 pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
756 pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
759 pci_dev->config_header.device_id = VIRTIO_NET_DEV_ID;
760 pci_dev->config_header.class = PCI_CLASS_NETWORK;
761 pci_dev->config_header.subclass = PCI_NET_SUBCLASS_OTHER;
763 pci_dev->config_header.subsystem_id = VIRTIO_NET_SUBDEVICE_ID;;
765 pci_dev->config_header.intr_pin = 1;
767 pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
770 net_state->pci_dev = pci_dev;
771 //net_state->pci_bus = pci_bus;
773 net_state->virtio_cfg.host_features = 0; //no features support now
775 net_state->rx_vq.queue_size = QUEUE_SIZE;
776 net_state->tx_vq.queue_size = QUEUE_SIZE;
777 net_state->ctrl_vq.queue_size = CTRL_QUEUE_SIZE;
779 net_state->virtio_dev = virtio;
781 virtio_reset(net_state);
788 static int connect_fn(struct guest_info * info,
789 void * frontend_data,
790 struct v3_dev_net_ops * ops,
792 void * private_data) {
793 struct virtio_dev_state * virtio = (struct virtio_dev_state *)frontend_data;
794 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
796 memset(net_state, 0, sizeof(struct virtio_net_state));
798 register_dev(virtio, net_state);
800 net_state->net_ops = ops;
801 net_state->backend_data = private_data;
807 //temporary interface between Virtio-NIC and Vnet
808 //Treat vnet as backend, and virtio nic as frontend
810 //used when virtio_nic get a packet from guest and send it to the backend
811 // send packet to all of the virtio nic devices other than the sender
812 static int vnet_send(uint8_t * buf, uint32_t len, void * private_data, struct vm_device *dest_dev){
814 PrintDebug("Virito NIC: In vnet_send: guest net state %p\n", private_data);
816 #ifdef CONFIG_DEBUG_VIRTIO_NET
817 print_packet(buf, len);
820 v3_vnet_send_rawpkt(buf, len, private_data);
824 //used to send packet to guest by a virtio nic
825 static int vnet_receive(uint8_t * buf, uint32_t count, void * private_data, struct vm_device *src_dev){
830 static int virtio_input(uchar_t * buf, uint_t len, void * private_data){
831 PrintDebug("Virito NIC: In virtio_input: guest net state %p\n", private_data);
833 #ifdef CONFIG_DEBUG_VIRTIO_NET
834 print_packet(buf, len);
837 return __virtio_dev_send(buf, len, private_data);
841 //register a virtio device to the vnet as backend
842 void register_virtio_to_vnet(struct vm_device *dev,
845 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
846 memset(net_state, 0, sizeof(struct virtio_net_state));
848 struct virtio_dev_state *virtio_state = (struct virtio_dev_state *)dev->private_data;
850 net_state->net_ops = (struct v3_dev_net_ops *)V3_Malloc(sizeof(struct v3_dev_net_ops));
852 net_state->net_ops->send = &vnet_send;
853 net_state->net_ops->receive = &vnet_receive;
855 register_dev(virtio_state, net_state);
857 PrintDebug("Virtio NIC After register Device %s: queue size: %d, %d\n", dev->name,
858 net_state->rx_vq.queue_size, net_state->tx_vq.queue_size);
860 PrintDebug("VNET: connect virtio nic state %p to vnet\n", net_state);
862 //add a device link to link table
863 int idx = vnet_register_device(dev, dev_name, mac, &virtio_input, net_state);
865 uchar_t srcmac[6] = {0x00,0x02,0x55,0x67,0x42,0x39};
866 uchar_t dstmac[6] = {0xff,0xff,0xff,0xff,0xff,0xff};
867 uchar_t zeromac[6] = {0,0,0,0,0,0};
869 vnet_add_route_entry(zeromac, dstmac, MAC_ANY, MAC_NONE, idx, LINK_INTERFACE, -1, LINK_INTERFACE);
871 vnet_add_route_entry(zeromac, srcmac, MAC_ANY, MAC_NONE, idx, LINK_INTERFACE, -1, LINK_INTERFACE);
873 vnet_add_route_entry(srcmac, zeromac, MAC_NONE, MAC_ANY, idx, LINK_INTERFACE, -1, LINK_INTERFACE);
879 static int virtio_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
880 struct vm_device * pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
881 struct virtio_dev_state * virtio_state = NULL;
882 char * name = v3_cfg_val(cfg, "name");
884 PrintDebug("Virtio NIC: Initializing VIRTIO Network device: %s\n", name);
886 if (pci_bus == NULL) {
887 PrintError("Virtio NIC: VirtIO devices require a PCI Bus");
891 virtio_state = (struct virtio_dev_state *)V3_Malloc(sizeof(struct virtio_dev_state));
892 memset(virtio_state, 0, sizeof(struct virtio_dev_state));
894 INIT_LIST_HEAD(&(virtio_state->dev_list));
895 virtio_state->pci_bus = pci_bus;
896 virtio_state->vm = vm;
898 struct vm_device * dev = v3_allocate_device(name, &dev_ops, virtio_state);
899 if (v3_attach_device(vm, dev) == -1) {
900 PrintError("Virtio NIC: Could not attach device %s\n", name);
904 if (v3_dev_add_net_frontend(vm, name, connect_fn, (void *)virtio_state) == -1) {
905 PrintError("Virtio NIC: Could not register %s as net frontend\n", name);
910 //for temporary testing, add a backend
913 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
914 memset(net_state, 0, sizeof(struct virtio_net_state));
916 net_state->net_ops = (struct v3_dev_net_ops *)V3_Malloc(sizeof(struct v3_dev_net_ops));
918 net_state->net_ops->send = &send;
919 net_state->net_ops->receive = &receive;
921 register_dev(virtio_state, net_state);
923 PrintDebug("Virtio NIC After register Device %s: queue size: %d, %d\n", dev->name,
924 net_state->rx_vq.queue_size, net_state->tx_vq.queue_size);
926 temp_net_states[net_idx ++] = net_state;
928 PrintDebug("Net_states: 0: %p, 1: %p, 2: %p\n", temp_net_states[0], temp_net_states[1], temp_net_states[2]);
932 #if 1 //test interface between vnet & virtio-nic
934 uchar_t mac[6] = {0,0,0,0,0,0};
935 register_virtio_to_vnet(dev, name,mac);
942 device_register("LNX_VIRTIO_NIC", virtio_init)