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) 2010, Lei Xia <lxia@northwestern.edu>
11 * Copyright (c) 2010, Cui Zheng <cuizheng@cs.unm.edu>
12 * Copyright (c) 2010, 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>
29 #include <palacios/vmm_lock.h>
30 #include <palacios/vmm_util.h>
31 #include <devices/pci.h>
34 #ifndef CONFIG_DEBUG_VIRTIO_NET
36 #define PrintDebug(fmt, args...)
39 #define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
40 #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
42 struct virtio_net_hdr {
45 #define VIRTIO_NET_HDR_GSO_NONE 0 /* Not a GSO frame */
47 uint16_t hdr_len; /* Ethernet + IP + tcp/udp hdrs */
48 uint16_t gso_size; /* Bytes to append to hdr_len per frame */
49 uint16_t csum_start; /* Position to start checksumming from */
50 uint16_t csum_offset; /* Offset after that to place checksum */
51 }__attribute__((packed));
54 /* This is the version of the header to use when the MRG_RXBUF
55 * feature has been negotiated. */
56 struct virtio_net_hdr_mrg_rxbuf {
57 struct virtio_net_hdr hdr;
58 uint16_t num_buffers; /* Number of merged rx buffers */
62 #define TX_QUEUE_SIZE 64
63 #define RX_QUEUE_SIZE 1024
64 #define CTRL_QUEUE_SIZE 64
67 #define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
68 #define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
69 #define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
70 #define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
72 struct virtio_net_config
74 uint8_t mac[ETH_ALEN]; /* VIRTIO_NET_F_MAC */
76 } __attribute__((packed));
78 struct virtio_dev_state {
79 struct vm_device * pci_bus;
80 struct list_head dev_list;
81 struct v3_vm_info *vm;
84 struct virtio_net_state {
85 struct virtio_net_config net_cfg;
86 struct virtio_config virtio_cfg;
88 struct vm_device * dev;
89 struct pci_device * pci_dev;
92 struct virtio_queue rx_vq; /* idx 0, pkts to guest */
93 struct virtio_queue tx_vq; /* idx 1, pkts from guest */
94 struct virtio_queue ctrl_vq; /* idx 2 */
97 int tx_disabled; /* stop TX pkts from guest */
98 uint16_t cur_notify_tx_idx; /*for used in update_tx_queue */
100 uint64_t pkt_sent, pkt_recv, pkt_drop;
101 uint64_t tx_stop_times, rx_stop_times, tx_poll_times, rx_ipi_num;
103 struct v3_dev_net_ops * net_ops;
104 v3_lock_t rx_lock, tx_lock;
107 struct virtio_dev_state * virtio_dev;
108 struct list_head dev_link;
111 /* virtio nic error type */
112 #define ERR_VIRTIO_OTHER 1
113 #define ERR_VIRTIO_RXQ_FULL 2
114 #define ERR_VIRTIO_RXQ_NOSET 3
115 #define ERR_VIRTIO_TXQ_NOSET 4
116 #define ERR_VIRTIO_TXQ_FULL 5
117 #define ERR_VIRTIO_TXQ_DISABLED 6
120 static int virtio_free(struct vm_device * dev)
126 static int virtio_init_state(struct virtio_net_state * virtio)
128 virtio->rx_vq.queue_size = RX_QUEUE_SIZE;
129 virtio->tx_vq.queue_size = TX_QUEUE_SIZE;
130 virtio->ctrl_vq.queue_size = CTRL_QUEUE_SIZE;
132 virtio->rx_vq.ring_desc_addr = 0;
133 virtio->rx_vq.ring_avail_addr = 0;
134 virtio->rx_vq.ring_used_addr = 0;
135 virtio->rx_vq.pfn = 0;
136 virtio->rx_vq.cur_avail_idx = 0;
138 virtio->tx_vq.ring_desc_addr = 0;
139 virtio->tx_vq.ring_avail_addr = 0;
140 virtio->tx_vq.ring_used_addr = 0;
141 virtio->tx_vq.pfn = 0;
142 virtio->tx_vq.cur_avail_idx = 0;
144 virtio->ctrl_vq.ring_desc_addr = 0;
145 virtio->ctrl_vq.ring_avail_addr = 0;
146 virtio->ctrl_vq.ring_used_addr = 0;
147 virtio->ctrl_vq.pfn = 0;
148 virtio->ctrl_vq.cur_avail_idx = 0;
150 virtio->virtio_cfg.pci_isr = 0;
152 virtio->virtio_cfg.host_features = 0; // (1 << VIRTIO_NET_F_MAC);
154 if ((v3_lock_init(&(virtio->rx_lock)) == -1) ||
155 (v3_lock_init(&(virtio->tx_lock)) == -1)){
156 PrintError("Virtio NIC: Failure to init locks for net_state\n");
159 virtio->pkt_sent = virtio->pkt_recv = virtio->pkt_drop = 0;
160 virtio->buffed_rx = 0;
165 static int pkt_tx(struct guest_info *core, struct virtio_net_state * virtio, struct vring_desc * buf_desc)
167 uint8_t * buf = NULL;
168 uint32_t len = buf_desc->length;
170 if (v3_gpa_to_hva(core, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
171 PrintError("Could not translate buffer address\n");
172 return -ERR_VIRTIO_OTHER;
175 return virtio->net_ops->send(buf, len, virtio->backend_data, NULL);
179 static int copy_data_to_desc(struct guest_info *core,
180 struct virtio_net_state * virtio_state,
181 struct vring_desc * desc,
187 uint8_t * desc_buf = NULL;
189 if (v3_gpa_to_hva(core, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
190 PrintError("Could not translate buffer address\n");
193 len = (desc->length < buf_len)?(desc->length - offset):buf_len;
194 memcpy(desc_buf+offset, buf, len);
200 static int get_desc_count(struct virtio_queue * q, int index) {
201 struct vring_desc * tmp_desc = &(q->desc[index]);
204 while (tmp_desc->flags & VIRTIO_NEXT_FLAG) {
205 tmp_desc = &(q->desc[tmp_desc->next]);
212 static inline void enable_cb(struct virtio_queue *queue){
213 queue->used->flags &= ~ VRING_NO_NOTIFY_FLAG;
216 static inline void disable_cb(struct virtio_queue *queue) {
217 queue->used->flags |= VRING_NO_NOTIFY_FLAG;
220 /* interrupt the guest, so the guest core get EXIT to Palacios
221 * this happens when there are either incoming pkts for the guest
222 * or the guest can start TX pkts again */
223 static inline void notify_guest(struct virtio_net_state * virtio){
224 v3_interrupt_cpu(virtio->virtio_dev->vm, virtio->virtio_dev->vm->cores[0].cpu_id, 0);
228 /* guest free some pkts from rx queue */
229 static int handle_rx_kick(struct guest_info *core, struct virtio_net_state * virtio)
233 flags = v3_lock_irqsave(virtio->rx_lock);
235 virtio->net_ops->start_rx(virtio->backend_data);
236 disable_cb(&virtio->rx_vq);
238 v3_unlock_irqrestore(virtio->rx_lock, flags);
243 #ifdef CONFIG_VNET_PROFILE
244 static void print_profile_info(struct virtio_net_state *virtio){
245 PrintError("Virtio NIC: %p, sent: %lld, rxed: %lld, dropped: %lld, \
246 tx_stop: %lld, rx_stop: %lld, poll_time: %lld, rx_ipi: %lld\n",
251 virtio->tx_stop_times,
252 virtio->rx_stop_times,
253 virtio->tx_poll_times,
258 static int handle_ctrl(struct guest_info *core, struct virtio_net_state * virtio) {
263 static int handle_pkt_tx(struct guest_info *core, struct virtio_net_state * virtio_state)
265 struct virtio_queue * q = &(virtio_state->tx_vq);
266 struct virtio_net_hdr * hdr = NULL;
270 if (!q->ring_avail_addr)
271 return -ERR_VIRTIO_TXQ_NOSET;
273 if(virtio_state->tx_disabled)
274 return -ERR_VIRTIO_TXQ_DISABLED;
276 flags = v3_lock_irqsave(virtio_state->tx_lock);
277 while (q->cur_avail_idx != q->avail->index) {
278 struct vring_desc * hdr_desc = NULL;
280 uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
281 int desc_cnt = get_desc_count(q, desc_idx);
282 uint32_t req_len = 0;
285 hdr_desc = &(q->desc[desc_idx]);
286 if (v3_gpa_to_hva(core, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
287 PrintError("Could not translate block header address\n");
291 hdr = (struct virtio_net_hdr*)hdr_addr;
292 desc_idx = hdr_desc->next;
295 PrintError("VNIC: merged rx buffer not supported\n");
299 /* here we assumed that one ethernet pkt is not splitted into multiple virtio buffer */
300 for (i = 0; i < desc_cnt - 1; i++) {
301 struct vring_desc * buf_desc = &(q->desc[desc_idx]);
302 if (pkt_tx(core, virtio_state, buf_desc) == -1) {
303 PrintError("Error handling nic operation\n");
307 req_len += buf_desc->length;
308 desc_idx = buf_desc->next;
310 virtio_state->pkt_sent ++;
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 = req_len; // What do we set this to????
320 v3_unlock_irqrestore(virtio_state->tx_lock, flags);
325 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
326 v3_pci_raise_irq(virtio_state->virtio_dev->pci_bus, 0, virtio_state->pci_dev);
327 virtio_state->virtio_cfg.pci_isr = 0x1;
331 #ifdef CONFIG_VNET_PROFILE
332 static long min = 1024, max = 0, total=0;
336 if(recved > max) max = recved;
337 if(recved < min) min = recved;
339 PrintError("VNIC: TX polling: %ld, min %ld, max %ld, avg: %ld pkts\n", total, min, max, total/i);
352 v3_unlock_irqrestore(virtio_state->tx_lock, flags);
353 return -ERR_VIRTIO_OTHER;
357 static int virtio_setup_queue(struct guest_info *core,
358 struct virtio_net_state * virtio_state,
359 struct virtio_queue * queue,
364 queue->ring_desc_addr = page_addr;
365 queue->ring_avail_addr = page_addr + (queue->queue_size * sizeof(struct vring_desc));
366 queue->ring_used_addr = ((queue->ring_avail_addr) +
367 (sizeof(struct vring_avail)) +
368 (queue->queue_size * sizeof(uint16_t)));
370 // round up to next page boundary.
371 queue->ring_used_addr = (queue->ring_used_addr + 0xfff) & ~0xfff;
372 if (v3_gpa_to_hva(core, queue->ring_desc_addr, (addr_t *)&(queue->desc)) == -1) {
373 PrintError("Could not translate ring descriptor address\n");
377 if (v3_gpa_to_hva(core, queue->ring_avail_addr, (addr_t *)&(queue->avail)) == -1) {
378 PrintError("Could not translate ring available address\n");
382 if (v3_gpa_to_hva(core, queue->ring_used_addr, (addr_t *)&(queue->used)) == -1) {
383 PrintError("Could not translate ring used address\n");
387 PrintDebug("RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
388 (void *)(queue->ring_desc_addr),
389 (void *)(queue->ring_avail_addr),
390 (void *)(queue->ring_used_addr));
392 PrintDebug("RingDesc=%p, Avail=%p, Used=%p\n",
393 queue->desc, queue->avail, queue->used);
398 static int virtio_io_write(struct guest_info *core, uint16_t port, void * src, uint_t length, void * private_data)
400 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
401 int port_idx = port % virtio->io_range_size;
404 PrintDebug("VIRTIO NIC %p Write for port %d (index=%d) len=%d, value=%x\n", private_data,
405 port, port_idx, length, *(uint32_t *)src);
408 case GUEST_FEATURES_PORT:
410 PrintError("Illegal write length for guest features\n");
413 virtio->virtio_cfg.guest_features = *(uint32_t *)src;
416 case VRING_PG_NUM_PORT:
418 PrintError("Illegal write length for page frame number\n");
421 addr_t pfn = *(uint32_t *)src;
422 addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
423 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
426 virtio_setup_queue(core, virtio, &virtio->rx_vq, pfn, page_addr);
427 disable_cb(&virtio->rx_vq);
430 virtio_setup_queue(core, virtio, &virtio->tx_vq, pfn, page_addr);
431 disable_cb(&virtio->tx_vq);
434 virtio_setup_queue(core, virtio, &virtio->ctrl_vq, pfn, page_addr);
441 case VRING_Q_SEL_PORT:
442 virtio->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
443 if (virtio->virtio_cfg.vring_queue_selector > 2) {
444 PrintError("Virtio NIC: wrong queue idx: %d\n",
445 virtio->virtio_cfg.vring_queue_selector);
450 case VRING_Q_NOTIFY_PORT:
452 uint16_t queue_idx = *(uint16_t *)src;
454 handle_rx_kick(core, virtio);
455 PrintError("rx kick\n");
456 } else if (queue_idx == 1){
457 PrintError("tx kick\n");
458 if (handle_pkt_tx(core, virtio) == -1) {
459 PrintError("Could not handle NIC Notification\n");
462 } else if (queue_idx == 2){
463 if (handle_ctrl(core, virtio) == -1) {
464 PrintError("Could not handle NIC Notification\n");
468 PrintError("Wrong queue index %d\n", queue_idx);
473 case VIRTIO_STATUS_PORT:
474 virtio->virtio_cfg.status = *(uint8_t *)src;
475 if (virtio->virtio_cfg.status == 0) {
476 PrintDebug("Resetting device\n");
477 virtio_init_state(virtio);
481 case VIRTIO_ISR_PORT:
482 virtio->virtio_cfg.pci_isr = *(uint8_t *)src;
493 static int virtio_io_read(struct guest_info *core, uint16_t port, void * dst, uint_t length, void * private_data)
495 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
496 int port_idx = port % virtio->io_range_size;
497 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
499 PrintDebug("Virtio NIC %p: Read for port %d (index =%d), length=%d\n", private_data,
500 port, port_idx, length);
503 case HOST_FEATURES_PORT:
505 PrintError("Illegal read length for host features\n");
508 *(uint32_t *)dst = virtio->virtio_cfg.host_features;
511 case VRING_PG_NUM_PORT:
513 PrintError("Illegal read length for page frame number\n");
518 *(uint32_t *)dst = virtio->rx_vq.pfn;
521 *(uint32_t *)dst = virtio->tx_vq.pfn;
524 *(uint32_t *)dst = virtio->ctrl_vq.pfn;
531 case VRING_SIZE_PORT:
533 PrintError("Illegal read length for vring size\n");
538 *(uint16_t *)dst = virtio->rx_vq.queue_size;
541 *(uint16_t *)dst = virtio->tx_vq.queue_size;
544 *(uint16_t *)dst = virtio->ctrl_vq.queue_size;
551 case VIRTIO_STATUS_PORT:
553 PrintError("Illegal read length for status\n");
556 *(uint8_t *)dst = virtio->virtio_cfg.status;
559 case VIRTIO_ISR_PORT:
560 *(uint8_t *)dst = virtio->virtio_cfg.pci_isr;
561 virtio->virtio_cfg.pci_isr = 0;
562 v3_pci_lower_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
566 PrintError("Virtio NIC: Read of Unhandled Virtio Read:%d\n", port_idx);
574 static int virtio_rx(uint8_t * buf, uint32_t size, void * private_data) {
575 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
576 struct virtio_queue * q = &(virtio->rx_vq);
577 struct virtio_net_hdr_mrg_rxbuf hdr;
578 uint32_t hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
579 uint32_t data_len = size;
582 int ret_val = -ERR_VIRTIO_OTHER;
585 flags = v3_lock_irqsave(virtio->rx_lock);
592 memcpy(&hdr, buf, sizeof(struct virtio_net_hdr_mrg_rxbuf));
594 memset(&hdr, 0, sizeof(struct virtio_net_hdr_mrg_rxbuf));
596 if (q->ring_avail_addr == 0) {
597 PrintError("Queue is not set\n");
598 ret_val = -ERR_VIRTIO_RXQ_NOSET;
602 if (q->cur_avail_idx != q->avail->index){
604 uint16_t hdr_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
605 uint16_t buf_idx = 0;
606 struct vring_desc * hdr_desc = NULL;
608 hdr_desc = &(q->desc[hdr_idx]);
609 if (v3_gpa_to_hva(&(virtio->virtio_dev->vm->cores[0]), hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
610 PrintError("Could not translate receive buffer address\n");
614 memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr_mrg_rxbuf));
615 if (offset >= data_len) {
616 hdr_desc->flags &= ~VIRTIO_NEXT_FLAG;
619 struct vring_desc * buf_desc = NULL;
620 for (buf_idx = hdr_desc->next; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
622 buf_desc = &(q->desc[buf_idx]);
624 len = copy_data_to_desc(&(virtio->virtio_dev->vm->cores[0]), virtio, buf_desc, buf + offset, data_len - offset, 0);
626 if (offset < data_len) {
627 buf_desc->flags = VIRTIO_NEXT_FLAG;
629 buf_desc->length = len;
631 buf_desc->flags &= ~VIRTIO_NEXT_FLAG;
633 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
634 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) */
638 /* if there are certain num of pkts in the RX queue, notify guest
639 * so guest will exit to palacios
640 * when it returns, guest gets the virtio rx interrupt */
641 if((++virtio->buffed_rx > q->queue_size/5) &&
642 (q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
643 if(virtio->virtio_dev->vm->cores[0].cpu_id != V3_Get_CPU()){
644 notify_guest(virtio);
645 virtio->rx_ipi_num ++;
647 virtio->buffed_rx = 0;
651 /* RX queue is full, tell backend to stop RX on this device */
652 virtio->net_ops->stop_rx(virtio->backend_data);
653 enable_cb(&virtio->rx_vq);
655 virtio->rx_stop_times ++;
657 ret_val = -ERR_VIRTIO_RXQ_FULL;
661 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
662 PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
663 v3_pci_raise_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
664 virtio->virtio_cfg.pci_isr = 0x1;
671 v3_unlock_irqrestore(virtio->rx_lock, flags);
677 static struct v3_device_ops dev_ops = {
685 /* TODO: Issue here: which vm info it needs? calling VM or the device's own VM? */
686 static void virtio_nic_poll(struct v3_vm_info *vm, void *data){
687 struct virtio_net_state *virtio = (struct virtio_net_state *)data;
689 handle_pkt_tx(&(vm->cores[0]), virtio);
691 virtio->tx_poll_times ++;
693 #ifdef CONFIG_VNET_PROFILE
694 static uint64_t last_time = 0;
697 if((time - last_time) > 5000000000){
699 print_profile_info(virtio);
704 static void virtio_start_tx(void *data){
705 struct virtio_net_state * virtio = (struct virtio_net_state *)data;
707 /* do we need a lock here? */
708 virtio->tx_disabled = 0;
710 /* notify the device's guest it can start sending pkt */
711 if(virtio->virtio_dev->vm->cores[0].cpu_id != V3_Get_CPU()){
712 notify_guest(virtio);
716 static void virtio_stop_tx(void *data){
717 struct virtio_net_state * virtio = (struct virtio_net_state *)data;
719 /* do we need a lock here? */
720 virtio->tx_disabled = 1;
722 /* how do we stop the guest to exit to palacios for sending pkt? */
723 if(virtio->virtio_dev->vm->cores[0].cpu_id != V3_Get_CPU()){
724 disable_cb(&virtio->tx_vq);
727 virtio->tx_stop_times ++;
733 static int register_dev(struct virtio_dev_state * virtio, struct virtio_net_state * net_state)
735 struct pci_device * pci_dev = NULL;
736 struct v3_pci_bar bars[6];
737 int num_ports = sizeof(struct virtio_config);
738 int tmp_ports = num_ports;
741 // This gets the number of ports, rounded up to a power of 2
742 net_state->io_range_size = 1; // must be a power of 2
743 while (tmp_ports > 0) {
745 net_state->io_range_size <<= 1;
748 // this is to account for any low order bits being set in num_ports
749 // if there are none, then num_ports was already a power of 2 so we shift right to reset it
750 if ((num_ports & ((net_state->io_range_size >> 1) - 1)) == 0) {
751 net_state->io_range_size >>= 1;
754 for (i = 0; i < 6; i++) {
755 bars[i].type = PCI_BAR_NONE;
758 PrintDebug("Virtio-NIC io_range_size = %d\n", net_state->io_range_size);
760 bars[0].type = PCI_BAR_IO;
761 bars[0].default_base_port = -1;
762 bars[0].num_ports = net_state->io_range_size;
763 bars[0].io_read = virtio_io_read;
764 bars[0].io_write = virtio_io_write;
765 bars[0].private_data = net_state;
767 pci_dev = v3_pci_register_device(virtio->pci_bus, PCI_STD_DEVICE,
768 0, 4/*PCI_AUTO_DEV_NUM*/, 0,
769 "LNX_VIRTIO_NIC", bars,
770 NULL, NULL, NULL, net_state);
773 PrintError("Virtio NIC: Could not register PCI Device\n");
777 PrintDebug("Virtio NIC: registered to PCI bus\n");
779 pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
780 pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
783 pci_dev->config_header.device_id = VIRTIO_NET_DEV_ID;
784 pci_dev->config_header.class = PCI_CLASS_NETWORK;
785 pci_dev->config_header.subclass = PCI_NET_SUBCLASS_OTHER;
786 pci_dev->config_header.subsystem_id = VIRTIO_NET_SUBDEVICE_ID;
787 pci_dev->config_header.intr_pin = 1;
788 pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
790 net_state->pci_dev = pci_dev;
791 net_state->virtio_dev = virtio;
793 uchar_t mac[6] = {0x11,0x11,0x11,0x11,0x11,0x11};
794 memcpy(net_state->net_cfg.mac, mac, 6);
796 memcpy(pci_dev->config_data, net_state->net_cfg.mac, ETH_ALEN);
798 virtio_init_state(net_state);
800 #if 0 //temporary hacking LX
801 vnic_states[num_vnic ++] = net_state;
802 PrintError("VNIC: num of vnic %d\n", num_vnic);
808 static int connect_fn(struct v3_vm_info * info,
809 void * frontend_data,
810 struct v3_dev_net_ops * ops,
812 void * private_data) {
813 struct virtio_dev_state * virtio = (struct virtio_dev_state *)frontend_data;
814 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
816 memset(net_state, 0, sizeof(struct virtio_net_state));
817 register_dev(virtio, net_state);
819 net_state->net_ops = ops;
820 net_state->backend_data = private_data;
822 ops->recv = virtio_rx;
823 ops->poll = virtio_nic_poll;
824 ops->start_tx = virtio_start_tx;
825 ops->stop_tx = virtio_stop_tx;
826 ops->frontend_data = net_state;
831 static int virtio_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
832 struct vm_device * pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
833 struct virtio_dev_state * virtio_state = NULL;
834 char * name = v3_cfg_val(cfg, "name");
836 PrintDebug("Virtio NIC: Initializing VIRTIO Network device: %s\n", name);
838 if (pci_bus == NULL) {
839 PrintError("Virtio NIC: VirtIO devices require a PCI Bus");
843 virtio_state = (struct virtio_dev_state *)V3_Malloc(sizeof(struct virtio_dev_state));
844 memset(virtio_state, 0, sizeof(struct virtio_dev_state));
846 INIT_LIST_HEAD(&(virtio_state->dev_list));
847 virtio_state->pci_bus = pci_bus;
848 virtio_state->vm = vm;
850 struct vm_device * dev = v3_allocate_device(name, &dev_ops, virtio_state);
851 if (v3_attach_device(vm, dev) == -1) {
852 PrintError("Virtio NIC: Could not attach device %s\n", name);
856 if (v3_dev_add_net_frontend(vm, name, connect_fn, (void *)virtio_state) == -1) {
857 PrintError("Virtio NIC: Could not register %s as net frontend\n", name);
864 device_register("LNX_VIRTIO_NIC", virtio_init)