* and the University of New Mexico. You can find out more at
* http://www.v3vee.org
*
- * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
* Copyright (c) 2008, Lei Xia <lxia@northwestern.edu>
+ * Copyright (c) 2008, Cui Zheng <cuizheng@cs.unm.edu>
* Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
* All rights reserved.
*
- * Author: Jack Lange <jarusl@cs.northwestern.edu>
- * Lei Xia <lxia@northwestern.edu>
+ * Author: Lei Xia <lxia@northwestern.edu>
+ * Cui Zheng <cuizheng@cs.unm.edu>
*
*
* This is free software. You are permitted to use,
#include <devices/lnx_virtio_pci.h>
#include <palacios/vm_guest_mem.h>
#include <palacios/vmm_sprintf.h>
+#include <palacios/vmm_vnet.h>
#include <devices/pci.h>
#define PrintDebug(fmt, args...)
#endif
+//#define VIRTIO_NIC_PROFILE
+
/* The feature bitmap for virtio net */
#define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */
#define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */
}__attribute__((packed));
-#define QUEUE_SIZE 256
+#define QUEUE_SIZE 4096
#define CTRL_QUEUE_SIZE 64
#define ETH_ALEN 6
void * backend_data;
struct virtio_dev_state * virtio_dev;
struct list_head dev_link;
+
+ ulong_t pkt_sent, pkt_recv, pkt_drop;
};
-#if 1
-//Temporarly for debug
+
+#ifdef CONFIG_DEBUG_VIRTIO_NET
+
static void print_packet(uchar_t *pkt, int size) {
- PrintDebug("Vnet: print_data_packet: size: %d\n", size);
+ PrintDebug("Virtio Nic: print_data_packet: size: %d\n", size);
v3_hexdump(pkt, size, NULL, 0);
}
+#endif
+
+#if 0
+//Temporarly for debug
+
+static struct virtio_net_state *temp_net_states[3];
+static int net_idx = 0;
+
+static int __virtio_dev_send(uchar_t * buf, uint32_t size, void *private_data);
+
static int send(uint8_t * buf, uint32_t count, void * private_data, struct vm_device *dest_dev)
{
- PrintDebug("Virito NIC: In sending stub\n");
- print_packet(buf, count);
+ PrintDebug("Virito NIC: In sending stub, guest %p, count %d\n", private_data, count);
+
+#ifdef CONFIG_DEBUG_VIRTIO_NET
+ print_packet(buf, 20);
+#endif
+ struct virtio_net_state *virtio_state = (struct virtio_net_state *)private_data;
+
+ if (virtio_state == temp_net_states[0])
+ __virtio_dev_send(buf, count, temp_net_states[1]);
+
+ if (virtio_state == temp_net_states[1]){ //return a RARP packet
+ __virtio_dev_send(buf, count, temp_net_states[0]);
+ }
+
return count;
}
return 0;
}
+
#endif
static int virtio_free(struct vm_device * dev)
virtio->virtio_cfg.host_features = 0;
//virtio->virtio_cfg.status = VIRTIO_NET_S_LINK_UP;
virtio->virtio_cfg.pci_isr = 0;
- virtio->private_data = NULL;
return 0;
}
uint8_t * buf = NULL;
uint32_t len = buf_desc->length;
- PrintDebug("Handling Virtio Net write\n");
+ PrintDebug("Virtio NIC: Handling Virtio Write, net_state: %p\n", virtio);
if (guest_pa_to_host_va(virtio->virtio_dev->vm, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
PrintError("Could not translate buffer address\n");
}
PrintDebug("Length=%d\n", buf_desc->length);
- PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d, buf address: %p, send address: %p\n", buf_desc,
- (void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next, buf, virtio->net_ops->send);
+ //PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d, buf address: %p, send address: %p\n", buf_desc,
+ //(void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next, buf, virtio->net_ops->send);
if (virtio->net_ops->send(buf, len, (void *)virtio, NULL) == -1) {
return -1;
}
len = (desc->length < buf_len)?desc->length:buf_len;
-
memcpy(desc_buf, buf, len);
- PrintDebug("Length=%d\n", len);
-
return len;
}
//send data to guest
-static int send_pkt_to_guest(struct vm_device * dev, uchar_t * buf, uint_t size, int raw, void * private_data)
+static int send_pkt_to_guest(struct virtio_net_state * virtio, uchar_t * buf, uint_t size, int raw, void * private_data)
{
- // TODO: This should not be like this
- struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
struct virtio_queue * q = &(virtio->rx_vq);
struct virtio_net_hdr hdr;
uint32_t hdr_len = sizeof(struct virtio_net_hdr);
uint32_t data_len = size;
uint32_t offset = 0;
+
+ PrintDebug("VIRTIO NIC: sending packet to virtio nic %p, size:%d", virtio, size);
- PrintDebug("VIRTIO Handle RX: cur_index=%d (mod=%d), avail_index=%d\n",
- q->cur_avail_idx, q->cur_avail_idx % q->queue_size, q->avail->index);
-
-
-
+ virtio->pkt_recv ++;
+
if (!raw) {
- data_len -= hdr_len;
+ data_len -= hdr_len;
}
build_receive_header(&hdr, buf, 1);
return -1;
}
-
- if (q->cur_avail_idx < q->avail->index) {
+ if (q->last_avail_idx > q->avail->index)
+ q->idx_overflow = true;
+ q->last_avail_idx = q->avail->index;
+
+ if (q->cur_avail_idx < q->avail->index || (q->idx_overflow && q->cur_avail_idx < q->avail->index+65536)){
addr_t hdr_addr = 0;
uint16_t hdr_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
uint16_t buf_idx = 0;
struct vring_desc * hdr_desc = NULL;
- PrintDebug("Descriptor index=%d\n", q->cur_avail_idx % q->queue_size);
-
hdr_desc = &(q->desc[hdr_idx]);
-
- PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
- (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
-
if (guest_pa_to_host_va(virtio->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
PrintError("Could not translate receive buffer address\n");
return -1;
}
- //copy header to the header descriptor
memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr));
- //copy data to the next descriptors
- for (buf_idx = 0; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
+ if (offset >= data_len) {
+ hdr_desc->flags &= ~VIRTIO_NEXT_FLAG;
+ }
+
+ for (buf_idx = hdr_desc->next; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
struct vring_desc * buf_desc = &(q->desc[buf_idx]);
uint32_t len = 0;
- buf_desc->flags = VIRTIO_NEXT_FLAG;
-
len = copy_data_to_desc(virtio, buf_desc, buf + offset, data_len - offset);
offset += len;
+
+ if (offset < data_len) {
+ buf_desc->flags = VIRTIO_NEXT_FLAG;
+ }
+
buf_desc->length = len; // TODO: do we need this?
}
q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
- q->used->ring[q->used->index % q->queue_size].length = data_len; // What do we set this to????
+ 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)
q->used->index++;
+
+ int last_idx = q->cur_avail_idx;
q->cur_avail_idx++;
+ if (q->cur_avail_idx < last_idx)
+ q->idx_overflow = false;
+ } else {
+ virtio->pkt_drop++;
+
+#ifdef VIRTIO_NIC_PROFILE
+ 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);
+#endif
}
+#ifdef VIRTIO_NIC_PROFILE
+ if ((virtio->pkt_recv % 10000) == 0){
+ 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);
+ }
+#endif
+
if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
v3_pci_raise_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
}
-int virtio_send(struct vm_device * dev, uchar_t * buf, uint_t size) {
- return send_pkt_to_guest(dev, buf, size, 1, NULL);
+// TODO:
+int virtio_send(struct guest_info * vm, char *dev_name, uchar_t * buf, uint_t size) {
+ struct vm_device * virtio_dev = v3_find_dev(vm, dev_name);
+
+ // TODO: how to get virtio net state from device??
+ // this is not right now
+ struct virtio_net_state * virtio_state = (struct virtio_net_state *)virtio_dev->private_data;
+
+ return send_pkt_to_guest(virtio_state, buf, size, 1, NULL);
}
+static int __virtio_dev_send(uchar_t * buf, uint32_t size, void *private_data) {
+ struct virtio_net_state *virtio_state = (struct virtio_net_state *)private_data;
+
+ return send_pkt_to_guest(virtio_state, buf, size, 1, NULL);
+}
+
static int get_desc_count(struct virtio_queue * q, int index) {
struct vring_desc * tmp_desc = &(q->desc[index]);
int cnt = 1;
//get packet from guest
static int handle_pkt_tx(struct virtio_net_state * virtio_state)
{
- //struct virtio_net_state *virtio = (struct virtio_net_state *)dev->private_data;
struct virtio_queue * q = &(virtio_state->tx_vq);
+ struct virtio_net_hdr * hdr = NULL;
- PrintDebug("VIRTIO NIC pkt_tx: cur_index=%d (mod=%d), avail_index=%d\n",
- q->cur_avail_idx, q->cur_avail_idx % q->queue_size, q->avail->index);
+ virtio_state->pkt_sent ++;
- struct virtio_net_hdr * hdr = NULL;
+ if (q->avail->index < q->last_avail_idx)
+ q->idx_overflow = true;
+ q->last_avail_idx = q->avail->index;
- while (q->cur_avail_idx < q->avail->index) {
+#ifdef VIRTIO_NIC_PROFILE
+ if(virtio_state->pkt_sent % 10000 == 0)
+ 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);
+#endif
+
+ while (q->cur_avail_idx < q->avail->index ||(q->idx_overflow && q->cur_avail_idx < (q->avail->index + 65536))) {
struct vring_desc * hdr_desc = NULL;
addr_t hdr_addr = 0;
uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
uint32_t req_len = 0;
int i = 0;
- PrintDebug("Descriptor Count=%d, index=%d\n", desc_cnt, q->cur_avail_idx % q->queue_size);
-
hdr_desc = &(q->desc[desc_idx]);
-
- PrintDebug("Header Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", hdr_desc,
- (void *)(hdr_desc->addr_gpa), hdr_desc->length, hdr_desc->flags, hdr_desc->next);
-
if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
PrintError("Could not translate block header address\n");
return -1;
}
- //memcpy(&hdr, (void *)hdr_addr, sizeof(struct virtio_net_hdr));
hdr = (struct virtio_net_hdr*)hdr_addr;
-
- PrintDebug("NIC Op Hdr (ptr=%p) header len =%x\n", (void *)hdr_addr, (int)hdr->hdr_len);
-
desc_idx = hdr_desc->next;
for (i = 0; i < desc_cnt - 1; i++) {
struct vring_desc * buf_desc = &(q->desc[desc_idx]);
-
- PrintDebug("Buffer Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n", buf_desc,
- (void *)(buf_desc->addr_gpa), buf_desc->length, buf_desc->flags, buf_desc->next);
-
if (pkt_write(virtio_state, buf_desc) == -1) {
PrintError("Error handling nic operation\n");
return -1;
q->used->ring[q->used->index % q->queue_size].length = req_len; // What do we set this to????
q->used->index++;
- q->cur_avail_idx++;
+
+ int last_idx = q->cur_avail_idx;
+ q->cur_avail_idx ++;
+ if (q->cur_avail_idx < last_idx)
+ q->idx_overflow = false;
}
if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
- PrintDebug("Raising IRQ %d\n", virtio_state->pci_dev->config_header.intr_line);
v3_pci_raise_irq(virtio_state->virtio_dev->pci_bus, 0, virtio_state->pci_dev);
virtio_state->virtio_cfg.pci_isr = 0x1;
}
int port_idx = port % virtio->io_range_size;
- PrintDebug("VIRTIO NIC Write for port %d (index=%d) len=%d, value=%x\n",
+ PrintDebug("VIRTIO NIC %p Write for port %d (index=%d) len=%d, value=%x\n", private_data,
port, port_idx, length, *(uint32_t *)src);
{
uint16_t queue_idx = *(uint16_t *)src;
- PrintDebug("Handling Kick\n");
+ //PrintDebug("Handling Kick\n");
if (queue_idx == 0){
- PrintError("receive queue notification\n");
+ PrintDebug("receive queue notification 0, packet get by Guest\n");
} else if (queue_idx == 1){
if (handle_pkt_tx(virtio) == -1) {
PrintError("Could not handle NIC Notification\n");
int port_idx = port % virtio->io_range_size;
uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
- PrintDebug("Virtio NIC: Read for port %d (index =%d), length=%d",
+ PrintDebug("Virtio NIC %p: Read for port %d (index =%d), length=%d", private_data,
port, port_idx, length);
switch (port_idx) {
net_state->ctrl_vq.queue_size = CTRL_QUEUE_SIZE;
net_state->virtio_dev = virtio;
+ net_state->pkt_sent = net_state->pkt_recv = net_state->pkt_drop = 0;
virtio_reset(net_state);
return 0;
}
+#if 1
+//temporary interface between Virtio-NIC and Vnet
+//Treat vnet as backend, and virtio nic as frontend
+
+//used when virtio_nic get a packet from guest and send it to the backend
+// send packet to all of the virtio nic devices other than the sender
+static int vnet_send(uint8_t * buf, uint32_t len, void * private_data, struct vm_device *dest_dev){
+
+ PrintDebug("Virito NIC: In vnet_send: guest net state %p\n", private_data);
+
+#ifdef CONFIG_DEBUG_VIRTIO_NET
+ print_packet(buf, len);
+#endif
+
+ v3_vnet_send_rawpkt(buf, len, private_data);
+ return 0;
+}
+
+//used to send packet to guest by a virtio nic
+static int vnet_receive(uint8_t * buf, uint32_t count, void * private_data, struct vm_device *src_dev){
+
+ return 0;
+}
+
+static int virtio_input(uchar_t * buf, uint_t len, void * private_data){
+ PrintDebug("Virito NIC: In virtio_input: guest net state %p\n", private_data);
+
+#ifdef CONFIG_DEBUG_VIRTIO_NET
+ print_packet(buf, len);
+#endif
+
+ return __virtio_dev_send(buf, len, private_data);
+}
+
+
+//register a virtio device to the vnet as backend
+void register_virtio_to_vnet(struct vm_device *dev,
+ char *dev_name,
+ uchar_t mac[6]){
+ struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
+ memset(net_state, 0, sizeof(struct virtio_net_state));
+
+ struct virtio_dev_state *virtio_state = (struct virtio_dev_state *)dev->private_data;
+
+ net_state->net_ops = (struct v3_dev_net_ops *)V3_Malloc(sizeof(struct v3_dev_net_ops));
+
+ net_state->net_ops->send = &vnet_send;
+ net_state->net_ops->receive = &vnet_receive;
+
+ register_dev(virtio_state, net_state);
+
+ PrintDebug("Virtio NIC After register Device %s: queue size: %d, %d\n", dev->name,
+ net_state->rx_vq.queue_size, net_state->tx_vq.queue_size);
+
+ PrintDebug("VNET: connect virtio nic state %p to vnet\n", net_state);
+
+ //add a device link to link table
+ int idx = vnet_register_device(dev, dev_name, mac, &virtio_input, net_state);
+
+ uchar_t srcmac[6] = {0x00,0x02,0x55,0x67,0x42,0x39};
+ uchar_t dstmac[6] = {0xff,0xff,0xff,0xff,0xff,0xff};
+ uchar_t zeromac[6] = {0,0,0,0,0,0};
+
+ vnet_add_route_entry(zeromac, dstmac, MAC_ANY, MAC_NONE, idx, LINK_INTERFACE, -1, LINK_INTERFACE);
+ if (idx == 0)
+ vnet_add_route_entry(zeromac, srcmac, MAC_ANY, MAC_NONE, idx, LINK_INTERFACE, -1, LINK_INTERFACE);
+ if (idx == 1)
+ vnet_add_route_entry(srcmac, zeromac, MAC_NONE, MAC_ANY, idx, LINK_INTERFACE, -1, LINK_INTERFACE);
+
+}
+
+#endif
static int virtio_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
struct vm_device * pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
struct virtio_dev_state * virtio_state = NULL;
char * name = v3_cfg_val(cfg, "name");
- PrintDebug("Virtio NIC: Initializing VIRTIO Network device\n");
+ PrintDebug("Virtio NIC: Initializing VIRTIO Network device: %s\n", name);
if (pci_bus == NULL) {
PrintError("Virtio NIC: VirtIO devices require a PCI Bus");
//for temporary testing, add a backend
- #if 1
-
+#if 0
+
struct virtio_net_state * net_state = (struct virtio_net_state *)V3_Malloc(sizeof(struct virtio_net_state));
memset(net_state, 0, sizeof(struct virtio_net_state));
register_dev(virtio_state, net_state);
- PrintDebug("Virtio NIC After register Device: queue size: %d, %d\n",
+ PrintDebug("Virtio NIC After register Device %s: queue size: %d, %d\n", dev->name,
net_state->rx_vq.queue_size, net_state->tx_vq.queue_size);
+ temp_net_states[net_idx ++] = net_state;
- #endif
+ PrintDebug("Net_states: 0: %p, 1: %p, 2: %p\n", temp_net_states[0], temp_net_states[1], temp_net_states[2]);
+#endif
+
+#if 1 //test interface between vnet & virtio-nic
+
+ uchar_t mac[6] = {0,0,0,0,0,0};
+ register_virtio_to_vnet(dev, name,mac);
+
+#endif
+
return 0;
}
