2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
11 * Copyright (c) 2008, Lei Xia <lxia@northwestern.edu>
12 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
13 * All rights reserved.
15 * Author: Jack Lange <jarusl@cs.northwestern.edu>
16 * Lei Xia <lxia@northwestern.edu>
19 * This is free software. You are permitted to use,
20 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
23 #include <palacios/vmm.h>
24 #include <palacios/vmm_dev_mgr.h>
25 #include <devices/lnx_virtio_pci.h>
26 #include <palacios/vm_guest_mem.h>
27 #include <palacios/vmm_sprintf.h>
29 #include <devices/pci.h>
32 #ifndef CONFIG_DEBUG_VIRTIO_NET
34 #define PrintDebug(fmt, args...)
37 /* The feature bitmap for virtio net */
38 #define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */
39 #define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */
40 #define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
41 #define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
42 #define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */
43 #define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */
44 #define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */
45 #define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */
46 #define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
47 #define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */
48 #define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */
49 #define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */
50 #define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
51 #define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */
52 #define VIRTIO_NET_F_CTRL_VQ 17 /* Control channel available */
53 #define VIRTIO_NET_F_CTRL_RX 18 /* Control channel RX mode support */
54 #define VIRTIO_NET_F_CTRL_VLAN 19 /* Control channel VLAN filtering */
55 #define VIRTIO_NET_F_CTRL_RX_EXTRA 20 /* Extra RX mode control support */
56 #define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
58 /* Maximum packet size we can receive from tap device: header + 64k */
59 #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
61 struct virtio_net_hdr {
64 #define VIRTIO_NET_HDR_GSO_NONE 0 /* Not a GSO frame */
67 uint16_t hdr_len; /* Ethernet + IP + tcp/udp hdrs */
68 uint16_t gso_size; /* Bytes to append to hdr_len per frame */
69 uint16_t csum_start; /* Position to start checksumming from */
70 uint16_t csum_offset; /* Offset after that to place checksum */
71 }__attribute__((packed));
74 #define QUEUE_SIZE 256
75 #define CTRL_QUEUE_SIZE 64
78 struct virtio_net_config
80 uint8_t mac[ETH_ALEN]; //VIRTIO_NET_F_MAC
82 } __attribute__((packed));
84 struct virtio_dev_state {
85 struct vm_device * pci_bus;
86 struct list_head dev_list;
87 struct guest_info * vm;
90 struct virtio_net_state {
91 struct virtio_net_config net_cfg;
92 struct virtio_config virtio_cfg;
94 struct pci_device * pci_dev;
97 struct virtio_queue rx_vq; //index 0, rvq in Linux virtio driver, handle packet to guest
98 struct virtio_queue tx_vq; //index 1, svq in Linux virtio driver, handle packet from guest
99 struct virtio_queue ctrl_vq; //index 2, ctrol info from guest
101 struct v3_dev_net_ops * net_ops;
104 struct virtio_dev_state * virtio_dev;
105 struct list_head dev_link;
109 //Temporarly for debug
110 static void print_packet(uchar_t *pkt, int size) {
111 PrintDebug("Vnet: print_data_packet: size: %d\n", size);
112 v3_hexdump(pkt, size, NULL, 0);
115 static struct virtio_net_state *temp_net_states[3];
116 static int net_idx = 0;
118 static int __virtio_dev_send(uchar_t * buf, uint32_t size, void *private_data);
120 static int send(uint8_t * buf, uint32_t count, void * private_data, struct vm_device *dest_dev)
122 PrintDebug("Virito NIC: In sending stub, guest %p\n", private_data);
123 print_packet(buf, count);
124 struct virtio_net_state *virtio_state = (struct virtio_net_state *)private_data;
126 if (virtio_state == temp_net_states[0])
127 __virtio_dev_send(buf, count, temp_net_states[1]);
132 static int receive(uint8_t * buf, uint32_t count, void * private_data, struct vm_device *src_dev)
134 PrintDebug("Virito NIC: In receiveing stub\n");
141 static int virtio_free(struct vm_device * dev)
147 static int virtio_reset(struct virtio_net_state * virtio)
149 virtio->rx_vq.ring_desc_addr = 0;
150 virtio->rx_vq.ring_avail_addr = 0;
151 virtio->rx_vq.ring_used_addr = 0;
152 virtio->rx_vq.pfn = 0;
153 virtio->rx_vq.cur_avail_idx = 0;
155 virtio->tx_vq.ring_desc_addr = 0;
156 virtio->tx_vq.ring_avail_addr = 0;
157 virtio->tx_vq.ring_used_addr = 0;
158 virtio->tx_vq.pfn = 0;
159 virtio->tx_vq.cur_avail_idx = 0;
161 virtio->ctrl_vq.ring_desc_addr = 0;
162 virtio->ctrl_vq.ring_avail_addr = 0;
163 virtio->ctrl_vq.ring_used_addr = 0;
164 virtio->ctrl_vq.pfn = 0;
165 virtio->ctrl_vq.cur_avail_idx = 0;
167 virtio->virtio_cfg.host_features = 0;
168 //virtio->virtio_cfg.status = VIRTIO_NET_S_LINK_UP;
169 virtio->virtio_cfg.pci_isr = 0;
175 //sending guest's packet to network sink
176 static int pkt_write(struct virtio_net_state * virtio, struct vring_desc * buf_desc)
178 //struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
179 uint8_t * buf = NULL;
180 uint32_t len = buf_desc->length;
182 PrintDebug("Handling Virtio Net write, net_state: %p\n", virtio);
184 if (guest_pa_to_host_va(virtio->virtio_dev->vm, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
185 PrintError("Could not translate buffer address\n");
189 PrintDebug("Length=%d\n", buf_desc->length);
190 PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d, buf address: %p, send address: %p\n", buf_desc,
191 (void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next, buf, virtio->net_ops->send);
193 if (virtio->net_ops->send(buf, len, (void *)virtio, NULL) == -1) {
201 static int build_receive_header(struct virtio_net_hdr * hdr, const void * buf, int raw) {
205 memcpy(hdr, buf, sizeof(struct virtio_net_hdr));
207 memset(hdr, 0, sizeof(struct virtio_net_hdr));
214 //sending guest's packet to network sink
215 static int copy_data_to_desc(struct virtio_net_state * virtio_state, struct vring_desc * desc, uchar_t * buf, uint_t buf_len)
218 uint8_t * desc_buf = NULL;
220 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
221 PrintError("Could not translate buffer address\n");
225 len = (desc->length < buf_len)?desc->length:buf_len;
227 memcpy(desc_buf, buf, len);
229 PrintDebug("Length=%d\n", len);
236 static int send_pkt_to_guest(struct virtio_net_state * virtio, uchar_t * buf, uint_t size, int raw, void * private_data)
238 struct virtio_queue * q = &(virtio->rx_vq);
239 struct virtio_net_hdr hdr;
240 uint32_t hdr_len = sizeof(struct virtio_net_hdr);
241 uint32_t data_len = size;
244 PrintDebug("VIRTIO NIC: Handle RX: cur_index=%d (mod=%d), avail_index=%d\n",
245 q->cur_avail_idx, q->cur_avail_idx % q->queue_size, q->avail->index);
247 PrintDebug("VIRTIO NIC: sending packet to net_state %p, size:%d", virtio, size);
253 build_receive_header(&hdr, buf, 1);
255 //queue is not set yet
256 if (q->ring_avail_addr == 0) {
257 PrintError("Queue is not set\n");
262 if (q->cur_avail_idx < q->avail->index) {
264 uint16_t hdr_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
265 uint16_t buf_idx = 0;
266 struct vring_desc * hdr_desc = NULL;
268 PrintDebug("Descriptor index=%d\n", q->cur_avail_idx % q->queue_size);
270 hdr_desc = &(q->desc[hdr_idx]);
272 PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
273 (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
275 if (guest_pa_to_host_va(virtio->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
276 PrintError("Could not translate receive buffer address\n");
280 //copy header to the header descriptor
281 memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr));
283 //Zheng 01/02/2010: zero payload
284 if (offset >= data_len) {
285 hdr_desc->flags &= ~VIRTIO_NEXT_FLAG;
288 //copy data to the next descriptors
289 //Zheng 01/02/2010: put data into the next descriptor, rather than 0!
290 for (buf_idx = hdr_desc->next; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
291 // for (buf_idx = 0; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
292 struct vring_desc * buf_desc = &(q->desc[buf_idx]);
295 //Zheng 01/02/2010: commented this - we need to check
296 // if there still is some data left
297 //buf_desc->flags = VIRTIO_NEXT_FLAG;
299 len = copy_data_to_desc(virtio, buf_desc, buf + offset, data_len - offset);
303 //Zheng 01/02/2010: check if there still is some data left
304 if (offset < data_len) {
305 buf_desc->flags = VIRTIO_NEXT_FLAG;
308 buf_desc->length = len; // TODO: do we need this?
311 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
312 q->used->ring[q->used->index % q->queue_size].length = data_len; // What do we set this to????
318 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
319 PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
320 v3_pci_raise_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
321 virtio->virtio_cfg.pci_isr = 0x1;
329 int virtio_send(struct guest_info * vm, char *dev_name, uchar_t * buf, uint_t size) {
330 struct vm_device * virtio_dev = v3_find_dev(vm, dev_name);
332 // TODO: how to get virtio net state from device??
333 // this is not right now
334 struct virtio_net_state * virtio_state = (struct virtio_net_state *)virtio_dev->private_data;
336 return send_pkt_to_guest(virtio_state, buf, size, 1, NULL);
340 static int __virtio_dev_send(uchar_t * buf, uint32_t size, void *private_data) {
341 struct virtio_net_state *virtio_state = (struct virtio_net_state *)private_data;
343 return send_pkt_to_guest(virtio_state, buf, size, 1, NULL);
346 static int get_desc_count(struct virtio_queue * q, int index) {
347 struct vring_desc * tmp_desc = &(q->desc[index]);
350 while (tmp_desc->flags & VIRTIO_NEXT_FLAG) {
351 tmp_desc = &(q->desc[tmp_desc->next]);
359 static int handle_ctrl(struct virtio_net_state * dev) {
363 //get packet from guest
364 static int handle_pkt_tx(struct virtio_net_state * virtio_state)
366 //struct virtio_net_state *virtio = (struct virtio_net_state *)dev->private_data;
367 struct virtio_queue * q = &(virtio_state->tx_vq);
369 PrintDebug("VIRTIO NIC pkt_tx: cur_index=%d (mod=%d), avail_index=%d\n",
370 q->cur_avail_idx, q->cur_avail_idx % q->queue_size, q->avail->index);
372 struct virtio_net_hdr * hdr = NULL;
374 while (q->cur_avail_idx < q->avail->index) {
375 struct vring_desc * hdr_desc = NULL;
377 uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
378 int desc_cnt = get_desc_count(q, desc_idx);
379 uint32_t req_len = 0;
382 PrintDebug("Descriptor Count=%d, index=%d\n", desc_cnt, q->cur_avail_idx % q->queue_size);
384 hdr_desc = &(q->desc[desc_idx]);
386 PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
387 (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
389 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
390 PrintError("Could not translate block header address\n");
394 //memcpy(&hdr, (void *)hdr_addr, sizeof(struct virtio_net_hdr));
395 hdr = (struct virtio_net_hdr*)hdr_addr;
397 PrintDebug("NIC Op Hdr (ptr=%p) header len =%x\n", (void *)hdr_addr, (int)hdr->hdr_len);
399 desc_idx = hdr_desc->next;
401 for (i = 0; i < desc_cnt - 1; i++) {
402 struct vring_desc * buf_desc = &(q->desc[desc_idx]);
404 PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", buf_desc,
405 (void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next);
407 if (pkt_write(virtio_state, buf_desc) == -1) {
408 PrintError("Error handling nic operation\n");
412 req_len += buf_desc->length;
413 desc_idx = buf_desc->next;
416 q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
417 q->used->ring[q->used->index % q->queue_size].length = req_len; // What do we set this to????
423 if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
424 PrintDebug("Raising IRQ %d\n", virtio_state->pci_dev->config_header.intr_line);
425 v3_pci_raise_irq(virtio_state->virtio_dev->pci_bus, 0, virtio_state->pci_dev);
426 virtio_state->virtio_cfg.pci_isr = 0x1;
433 static int virtio_setup_queue(struct virtio_net_state * virtio_state, struct virtio_queue * queue, addr_t pfn, addr_t page_addr) {
436 queue->ring_desc_addr = page_addr;
437 queue->ring_avail_addr = page_addr + (queue->queue_size * sizeof(struct vring_desc));
438 queue->ring_used_addr = ((queue->ring_avail_addr) +
439 (sizeof(struct vring_avail)) +
440 (queue->queue_size * sizeof(uint16_t)));
442 // round up to next page boundary.
443 queue->ring_used_addr = (queue->ring_used_addr + 0xfff) & ~0xfff;
445 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_desc_addr, (addr_t *)&(queue->desc)) == -1) {
446 PrintError("Could not translate ring descriptor address\n");
451 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_avail_addr, (addr_t *)&(queue->avail)) == -1) {
452 PrintError("Could not translate ring available address\n");
457 if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_used_addr, (addr_t *)&(queue->used)) == -1) {
458 PrintError("Could not translate ring used address\n");
462 PrintDebug("RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
463 (void *)(queue->ring_desc_addr),
464 (void *)(queue->ring_avail_addr),
465 (void *)(queue->ring_used_addr));
467 PrintDebug("RingDesc=%p, Avail=%p, Used=%p\n",
468 queue->desc, queue->avail, queue->used);
475 static int virtio_io_write(uint16_t port, void * src, uint_t length, void * private_data)
477 //struct vm_device * dev = (struct vm_device *)private_data;
478 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
479 int port_idx = port % virtio->io_range_size;
482 PrintDebug("VIRTIO NIC %p Write for port %d (index=%d) len=%d, value=%x\n", private_data,
483 port, port_idx, length, *(uint32_t *)src);
487 case GUEST_FEATURES_PORT:
489 PrintError("Illegal write length for guest features\n");
493 virtio->virtio_cfg.guest_features = *(uint32_t *)src;
494 PrintDebug("Setting Guest Features to %x\n", virtio->virtio_cfg.guest_features);
497 case VRING_PG_NUM_PORT:
500 PrintError("Illegal write length for page frame number\n");
504 addr_t pfn = *(uint32_t *)src;
505 addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
506 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
510 virtio_setup_queue(virtio, &virtio->rx_vq, pfn, page_addr);
513 virtio_setup_queue(virtio, &virtio->tx_vq, pfn, page_addr);
516 virtio_setup_queue(virtio, &virtio->ctrl_vq, pfn, page_addr);
524 case VRING_Q_SEL_PORT:
525 virtio->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
527 if (virtio->virtio_cfg.vring_queue_selector > 2) {
528 PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
529 virtio->virtio_cfg.vring_queue_selector);
534 case VRING_Q_NOTIFY_PORT:
536 uint16_t queue_idx = *(uint16_t *)src;
538 PrintDebug("Handling Kick\n");
541 PrintError("receive queue notification\n");
542 } else if (queue_idx == 1){
543 if (handle_pkt_tx(virtio) == -1) {
544 PrintError("Could not handle NIC Notification\n");
547 } else if (queue_idx == 2){
548 if (handle_ctrl(virtio) == -1) {
549 PrintError("Could not handle NIC Notification\n");
553 PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
559 case VIRTIO_STATUS_PORT:
560 virtio->virtio_cfg.status = *(uint8_t *)src;
562 if (virtio->virtio_cfg.status == 0) {
563 PrintDebug("Resetting device\n");
564 virtio_reset(virtio);
569 case VIRTIO_ISR_PORT:
570 virtio->virtio_cfg.pci_isr = *(uint8_t *)src;
581 static int virtio_io_read(uint16_t port, void * dst, uint_t length, void * private_data)
583 //struct vm_device * dev = (struct vm_device *)private_data;
584 struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
585 int port_idx = port % virtio->io_range_size;
586 uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
588 PrintDebug("Virtio NIC %p: Read for port %d (index =%d), length=%d", private_data,
589 port, port_idx, length);
592 case HOST_FEATURES_PORT:
594 PrintError("Illegal read length for host features\n");
598 *(uint32_t *)dst = virtio->virtio_cfg.host_features;
600 PrintDebug("value=0x%x\n", *(uint32_t *)dst);
603 case VRING_PG_NUM_PORT:
606 PrintError("Illegal read length for page frame number\n");
612 *(uint32_t *)dst = virtio->rx_vq.pfn;
615 *(uint32_t *)dst = virtio->tx_vq.pfn;
618 *(uint32_t *)dst = virtio->ctrl_vq.pfn;
624 PrintDebug(", value=0x%x\n", *(uint32_t *)dst);
627 case VRING_SIZE_PORT:
630 PrintError("Illegal read length for vring size\n");
636 *(uint16_t *)dst = virtio->rx_vq.queue_size;
639 *(uint16_t *)dst = virtio->tx_vq.queue_size;
642 *(uint16_t *)dst = virtio->ctrl_vq.queue_size;
648 PrintDebug("queue index: %d, value=0x%x\n", (int)queue_idx, *(uint16_t *)dst);
651 case VIRTIO_STATUS_PORT:
654 PrintError("Illegal read length for status\n");
658 *(uint8_t *)dst = virtio->virtio_cfg.status;
660 PrintDebug(", value=0x%x\n", *(uint8_t *)dst);
663 case VIRTIO_ISR_PORT:
664 *(uint8_t *)dst = virtio->virtio_cfg.pci_isr;
665 virtio->virtio_cfg.pci_isr = 0;
666 v3_pci_lower_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
668 PrintDebug(", value=0x%x\n", *(uint8_t *)dst);
673 PrintError("Virtio NIC: Read of Unhandled Virtio Read\n");
681 static struct v3_device_ops dev_ops = {
689 static int register_dev(struct virtio_dev_state * virtio, struct virtio_net_state * net_state)
691 struct pci_device * pci_dev = NULL;
692 struct v3_pci_bar bars[6];
693 int num_ports = sizeof(struct virtio_config);
694 int tmp_ports = num_ports;
697 // This gets the number of ports, rounded up to a power of 2
698 net_state->io_range_size = 1; // must be a power of 2
700 while (tmp_ports > 0) {
702 net_state->io_range_size <<= 1;
705 // this is to account for any low order bits being set in num_ports
706 // if there are none, then num_ports was already a power of 2 so we shift right to reset it
707 if ((num_ports & ((net_state->io_range_size >> 1) - 1)) == 0) {
708 net_state->io_range_size >>= 1;
712 for (i = 0; i < 6; i++) {
713 bars[i].type = PCI_BAR_NONE;
716 PrintDebug("Virtio-NIC io_range_size = %d\n", net_state->io_range_size);
718 bars[0].type = PCI_BAR_IO;
719 bars[0].default_base_port = -1;
720 bars[0].num_ports = net_state->io_range_size;
722 bars[0].io_read = virtio_io_read;
723 bars[0].io_write = virtio_io_write;
724 bars[0].private_data = net_state;
726 pci_dev = v3_pci_register_device(virtio->pci_bus, PCI_STD_DEVICE,
727 0, PCI_AUTO_DEV_NUM, 0,
728 "LNX_VIRTIO_NIC", bars,
729 NULL, NULL, NULL, net_state);
732 PrintError("Virtio NIC: Could not register PCI Device\n");
736 PrintDebug("Virtio NIC: registered to PCI bus\n");
738 pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
739 pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
742 pci_dev->config_header.device_id = VIRTIO_NET_DEV_ID;
743 pci_dev->config_header.class = PCI_CLASS_NETWORK;
744 pci_dev->config_header.subclass = PCI_NET_SUBCLASS_OTHER;
746 pci_dev->config_header.subsystem_id = VIRTIO_NET_SUBDEVICE_ID;;
748 pci_dev->config_header.intr_pin = 1;
750 pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
753 net_state->pci_dev = pci_dev;
754 //net_state->pci_bus = pci_bus;
756 net_state->virtio_cfg.host_features = 0; //no features support now
758 net_state->rx_vq.queue_size = QUEUE_SIZE;
759 net_state->tx_vq.queue_size = QUEUE_SIZE;
760 net_state->ctrl_vq.queue_size = CTRL_QUEUE_SIZE;
762 net_state->virtio_dev = virtio;
764 virtio_reset(net_state);
771 static int connect_fn(struct guest_info * info,
772 void * frontend_data,
773 struct v3_dev_net_ops * ops,
775 void * private_data) {
776 struct virtio_dev_state * virtio = (struct virtio_dev_state *)frontend_data;
777 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
779 memset(net_state, 0, sizeof(struct virtio_net_state));
781 register_dev(virtio, net_state);
783 net_state->net_ops = ops;
784 net_state->backend_data = private_data;
790 static int virtio_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
791 struct vm_device * pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
792 struct virtio_dev_state * virtio_state = NULL;
793 char * name = v3_cfg_val(cfg, "name");
795 PrintDebug("Virtio NIC: Initializing VIRTIO Network device: %s\n", name);
797 if (pci_bus == NULL) {
798 PrintError("Virtio NIC: VirtIO devices require a PCI Bus");
802 virtio_state = (struct virtio_dev_state *)V3_Malloc(sizeof(struct virtio_dev_state));
803 memset(virtio_state, 0, sizeof(struct virtio_dev_state));
805 INIT_LIST_HEAD(&(virtio_state->dev_list));
806 virtio_state->pci_bus = pci_bus;
807 virtio_state->vm = vm;
809 struct vm_device * dev = v3_allocate_device(name, &dev_ops, virtio_state);
810 if (v3_attach_device(vm, dev) == -1) {
811 PrintError("Virtio NIC: Could not attach device %s\n", name);
815 if (v3_dev_add_net_frontend(vm, name, connect_fn, (void *)virtio_state) == -1) {
816 PrintError("Virtio NIC: Could not register %s as net frontend\n", name);
821 //for temporary testing, add a backend
824 struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
825 memset(net_state, 0, sizeof(struct virtio_net_state));
827 net_state->net_ops = (struct v3_dev_net_ops *)V3_Malloc(sizeof(struct v3_dev_net_ops));
829 net_state->net_ops->send = &send;
830 net_state->net_ops->receive = &receive;
832 register_dev(virtio_state, net_state);
834 PrintDebug("Virtio NIC After register Device %s: queue size: %d, %d\n", dev->name,
835 net_state->rx_vq.queue_size, net_state->tx_vq.queue_size);
837 temp_net_states[net_idx ++] = net_state;
839 PrintDebug("Net_states: 0: %p, 1: %p, 2: %p\n", temp_net_states[0], temp_net_states[1], temp_net_states[2]);
846 device_register("LNX_VIRTIO_NIC", virtio_init)