/* Maximum packet size we can receive from tap device: header + 64k */
#define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
-
struct virtio_net_hdr {
uint8_t flags;
}__attribute__((packed));
-
-
#define QUEUE_SIZE 256
#define CTRL_QUEUE_SIZE 64
-
#define ETH_ALEN 6
struct virtio_net_config
{
- uint8_t mac[ETH_ALEN];
- // See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above
+ uint8_t mac[ETH_ALEN]; //VIRTIO_NET_F_MAC
uint16_t status;
} __attribute__((packed));
struct virtio_net_config net_cfg;
struct virtio_config virtio_cfg;
- //struct vm_device * pci_bus;
- struct pci_device * pci_dev;
+ struct pci_device * pci_dev;
+ int io_range_size;
struct virtio_queue rx_vq; //index 0, rvq in Linux virtio driver, handle packet to guest
struct virtio_queue tx_vq; //index 1, svq in Linux virtio driver, handle packet from guest
struct v3_dev_net_ops * net_ops;
void * backend_data;
-
struct virtio_dev_state * virtio_dev;
-
struct list_head dev_link;
-
- int io_range_size;
-
- void *private_data;
};
#if 1
v3_hexdump(pkt, size, NULL, 0);
}
+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");
+ PrintDebug("Virito NIC: In sending stub, guest %p\n", private_data);
print_packet(buf, count);
+ 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]);
+
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;
}
//sending guest's packet to network sink
-static int pkt_write(struct virtio_net_state *virtio, struct vring_desc *buf_desc)
+static int pkt_write(struct virtio_net_state * virtio, struct vring_desc * buf_desc)
{
//struct virtio_net_state * virtio = (struct virtio_net_state *)dev->private_data;
- uint8_t *buf = NULL;
+ uint8_t * buf = NULL;
uint32_t len = buf_desc->length;
- PrintDebug("Handling Virtio Net write\n");
+ PrintDebug("Handling Virtio Net 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);
+ (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;
}
-static int build_receive_header(struct virtio_net_hdr *hdr, const void *buf, int raw)
-{
+static int build_receive_header(struct virtio_net_hdr * hdr, const void * buf, int raw) {
hdr->flags = 0;
if (!raw) {
//sending guest's packet to network sink
-static int copy_data_to_desc(struct virtio_net_state * virtio_state, struct vring_desc *desc, uchar_t *buf, uint_t buf_len)
+static int copy_data_to_desc(struct virtio_net_state * virtio_state, struct vring_desc * desc, uchar_t * buf, uint_t buf_len)
{
uint32_t len;
- uint8_t *desc_buf = NULL;
+ uint8_t * desc_buf = NULL;
if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
PrintError("Could not translate buffer address\n");
//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_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 Handle RX: cur_index=%d (mod=%d), avail_index=%d\n",
+ PrintDebug("VIRTIO NIC: 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);
- struct virtio_net_hdr hdr;
- uint32_t hdr_len = sizeof(struct virtio_net_hdr);
+ PrintDebug("VIRTIO NIC: sending packet to net_state %p, size:%d", virtio, size);
- uint32_t data_len = size;
- if (!raw)
- data_len -= hdr_len;
+ if (!raw) {
+ data_len -= hdr_len;
+ }
build_receive_header(&hdr, buf, 1);
//queue is not set yet
- if (q->ring_avail_addr == 0)
- return -1;
+ if (q->ring_avail_addr == 0) {
+ PrintError("Queue is not set\n");
+ return -1;
+ }
-\r uint32_t offset = 0;
+
if (q->cur_avail_idx < q->avail->index) {
- struct vring_desc * hdr_desc = NULL;
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);
//copy header to the header descriptor
memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr));
- uint16_t buf_idx = 0;
- struct vring_desc * buf_desc = NULL;
+ //Zheng 01/02/2010: zero payload
+ if (offset >= data_len) {
+ hdr_desc->flags &= ~VIRTIO_NEXT_FLAG;
+ }
+
//copy data to the next descriptors
- for (buf_idx = 0; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
- q->desc[buf_idx].flags = VIRTIO_NEXT_FLAG;
- buf_desc = &(q->desc[buf_idx]);
- uint32_t len = copy_data_to_desc(virtio, buf_desc, buf+offset, data_len - offset);
- offset += len;
- buf_desc->length = len; // TODO: do we need this?
+ //Zheng 01/02/2010: put data into the next descriptor, rather than 0!
+ for (buf_idx = hdr_desc->next; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
+ // for (buf_idx = 0; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
+ struct vring_desc * buf_desc = &(q->desc[buf_idx]);
+ uint32_t len = 0;
+
+ //Zheng 01/02/2010: commented this - we need to check
+ // if there still is some data left
+ //buf_desc->flags = VIRTIO_NEXT_FLAG;
+
+ len = copy_data_to_desc(virtio, buf_desc, buf + offset, data_len - offset);
+
+ offset += len;
+
+ //Zheng 01/02/2010: check if there still is some data left
+ 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];
}
-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 get_desc_count(struct virtio_queue * q, int index)
-{
+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;
}
-static int handle_ctrl(struct virtio_net_state * dev)
-{
-
-
+static int handle_ctrl(struct virtio_net_state * dev) {
return 0;
}
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_queue * q = &(virtio_state->tx_vq);
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);
- struct virtio_net_hdr *hdr = NULL;
+ struct virtio_net_hdr * hdr = NULL;
while (q->cur_avail_idx < q->avail->index) {
struct vring_desc * hdr_desc = NULL;
- struct vring_desc * buf_desc = NULL;
-
addr_t hdr_addr = 0;
uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
int desc_cnt = get_desc_count(q, desc_idx);
uint32_t req_len = 0;
+ int i = 0;
PrintDebug("Descriptor Count=%d, index=%d\n", desc_cnt, q->cur_avail_idx % q->queue_size);
PrintDebug("NIC Op Hdr (ptr=%p) header len =%x\n", (void *)hdr_addr, (int)hdr->hdr_len);
- desc_idx= hdr_desc->next;
- int i = 0;
+ desc_idx = hdr_desc->next;
+
for (i = 0; i < desc_cnt - 1; i++) {
- buf_desc = &(q->desc[desc_idx]);
+ 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);
}
-static int virtio_setup_queue(struct virtio_net_state *virtio_state, struct virtio_queue *queue, addr_t pfn, addr_t page_addr)
-{
+static int virtio_setup_queue(struct virtio_net_state * virtio_state, struct virtio_queue * queue, addr_t pfn, addr_t page_addr) {
queue->pfn = pfn;
- queue->ring_desc_addr = page_addr ;
- queue->ring_avail_addr = page_addr + (queue->queue_size* sizeof(struct vring_desc));
- queue->ring_used_addr = (queue->ring_avail_addr + \
- sizeof(struct vring_avail) + \
- (queue->queue_size * sizeof(uint16_t)));
+ queue->ring_desc_addr = page_addr;
+ queue->ring_avail_addr = page_addr + (queue->queue_size * sizeof(struct vring_desc));
+ queue->ring_used_addr = ((queue->ring_avail_addr) +
+ (sizeof(struct vring_avail)) +
+ (queue->queue_size * sizeof(uint16_t)));
// round up to next page boundary.
queue->ring_used_addr = (queue->ring_used_addr + 0xfff) & ~0xfff;
}
PrintDebug("RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
- (void *)(queue->ring_desc_addr),
- (void *)(queue->ring_avail_addr),
- (void *)(queue->ring_used_addr));
-
+ (void *)(queue->ring_desc_addr),
+ (void *)(queue->ring_avail_addr),
+ (void *)(queue->ring_used_addr));
+
PrintDebug("RingDesc=%p, Avail=%p, Used=%p\n",
- queue->desc, queue->avail, queue->used);
-
+ queue->desc, queue->avail, queue->used);
+
return 0;
}
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);
break;
case VRING_PG_NUM_PORT:
- if (length == 4) {
- addr_t pfn = *(uint32_t *)src;
- addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
-
- uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
- switch (queue_idx) {
- case 0:
- virtio_setup_queue(virtio, &virtio->rx_vq, pfn, page_addr);
- break;
- case 1:
- virtio_setup_queue(virtio, &virtio->tx_vq, pfn, page_addr);
- break;
- case 2:
- virtio_setup_queue(virtio, &virtio->ctrl_vq, pfn, page_addr);
- break;
-
- default:
- break;
- }
- } else {
+
+ if (length != 4) {
PrintError("Illegal write length for page frame number\n");
return -1;
}
+
+ addr_t pfn = *(uint32_t *)src;
+ addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
+ uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
+
+ switch (queue_idx) {
+ case 0:
+ virtio_setup_queue(virtio, &virtio->rx_vq, pfn, page_addr);
+ break;
+ case 1:
+ virtio_setup_queue(virtio, &virtio->tx_vq, pfn, page_addr);
+ break;
+ case 2:
+ virtio_setup_queue(virtio, &virtio->ctrl_vq, pfn, page_addr);
+ break;
+
+ default:
+ break;
+ }
+
break;
case VRING_Q_SEL_PORT:
virtio->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
}
break;
- case VRING_Q_NOTIFY_PORT:
- PrintDebug("Handling Kick\n");
- uint16_t queue_idx = *(uint16_t *)src;
- if (queue_idx == 0){
+ case VRING_Q_NOTIFY_PORT:
+ {
+ uint16_t queue_idx = *(uint16_t *)src;
+
+ PrintDebug("Handling Kick\n");
+
+ if (queue_idx == 0){
PrintError("receive queue notification\n");
- }else if (queue_idx == 1){
+ } else if (queue_idx == 1){
if (handle_pkt_tx(virtio) == -1) {
PrintError("Could not handle NIC Notification\n");
return -1;
}
- }else if (queue_idx == 2){
+ } else if (queue_idx == 2){
if (handle_ctrl(virtio) == -1) {
PrintError("Could not handle NIC Notification\n");
return -1;
}
- }else {
- PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
- queue_idx);
+ } else {
+ PrintError("Virtio NIC device only uses 3 queue, selected %d\n",
+ queue_idx);
+ }
+
+ break;
}
-
- break;
case VIRTIO_STATUS_PORT:
virtio->virtio_cfg.status = *(uint8_t *)src;
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) {
*(uint32_t *)dst = virtio->virtio_cfg.host_features;
- PrintDebug("value=0x%x\n", (int)*(uint32_t *)dst);
+ PrintDebug("value=0x%x\n", *(uint32_t *)dst);
break;
case VRING_PG_NUM_PORT:
switch (queue_idx) {
case 0:
- *(uint32_t *)dst = virtio->rx_vq.pfn;
- break;
- case 1:
- *(uint32_t *)dst = virtio->tx_vq.pfn;
- break;
- case 2:
- *(uint32_t *)dst = virtio->ctrl_vq.pfn;
- break;
- default:
- break;
- }
- PrintDebug(", value=0x%x\n", (int)*(uint32_t *)dst);
+ *(uint32_t *)dst = virtio->rx_vq.pfn;
+ break;
+ case 1:
+ *(uint32_t *)dst = virtio->tx_vq.pfn;
+ break;
+ case 2:
+ *(uint32_t *)dst = virtio->ctrl_vq.pfn;
+ break;
+ default:
+ break;
+ }
+
+ PrintDebug(", value=0x%x\n", *(uint32_t *)dst);
break;
case VRING_SIZE_PORT:
+
if (length != 2) {
PrintError("Illegal read length for vring size\n");
return -1;
switch (queue_idx) {
case 0:
- *(uint16_t *)dst = virtio->rx_vq.queue_size;
- break;
- case 1:
- *(uint16_t *)dst = virtio->tx_vq.queue_size;
- break;
- case 2:
- *(uint16_t *)dst = virtio->ctrl_vq.queue_size;
- break;
- default:
- break;
- }
-
- PrintDebug("queue index: %d, value=0x%x\n", (int)queue_idx, (int)(int)*(uint16_t *)dst);
+ *(uint16_t *)dst = virtio->rx_vq.queue_size;
+ break;
+ case 1:
+ *(uint16_t *)dst = virtio->tx_vq.queue_size;
+ break;
+ case 2:
+ *(uint16_t *)dst = virtio->ctrl_vq.queue_size;
+ break;
+ default:
+ break;
+ }
+
+ PrintDebug("queue index: %d, value=0x%x\n", (int)queue_idx, *(uint16_t *)dst);
break;
case VIRTIO_STATUS_PORT:
+
if (length != 1) {
PrintError("Illegal read length for status\n");
return -1;
*(uint8_t *)dst = virtio->virtio_cfg.status;
- PrintDebug(", value=0x%x\n", (int)*(uint8_t *)dst);
+ PrintDebug(", value=0x%x\n", *(uint8_t *)dst);
break;
case VIRTIO_ISR_PORT:
virtio->virtio_cfg.pci_isr = 0;
v3_pci_lower_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
- PrintDebug(", value=0x%x\n", (int)*(uint8_t *)dst);
+ PrintDebug(", value=0x%x\n", *(uint8_t *)dst);
break;
default:
- PrintError("Read of Unhandled Virtio Read\n");
- return -1;
+ PrintError("Virtio NIC: Read of Unhandled Virtio Read\n");
+ return -1;
}
return length;
NULL, NULL, NULL, net_state);
if (!pci_dev) {
- PrintError("Could not register PCI Device\n");
+ PrintError("Virtio NIC: Could not register PCI Device\n");
return -1;
}
- PrintDebug("Virtio-NIC registered to PCI bus\n");
+ PrintDebug("Virtio NIC: registered to PCI bus\n");
pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
void * frontend_data,
struct v3_dev_net_ops * ops,
v3_cfg_tree_t * cfg,
- void * private_data)
-{
+ void * private_data) {
struct virtio_dev_state * virtio = (struct virtio_dev_state *)frontend_data;
-
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, net_state);
struct virtio_dev_state * virtio_state = NULL;
char * name = v3_cfg_val(cfg, "name");
- PrintDebug("Initializing VIRTIO Network device\n");
+ PrintDebug("Virtio NIC: Initializing VIRTIO Network device: %s\n", name);
if (pci_bus == NULL) {
- PrintError("VirtIO devices require a PCI Bus");
+ PrintError("Virtio NIC: VirtIO devices require a PCI Bus");
return -1;
}
struct vm_device * dev = v3_allocate_device(name, &dev_ops, virtio_state);
if (v3_attach_device(vm, dev) == -1) {
- PrintError("Could not attach device %s\n", name);
+ PrintError("Virtio NIC: Could not attach device %s\n", name);
return -1;
}
if (v3_dev_add_net_frontend(vm, name, connect_fn, (void *)virtio_state) == -1) {
- PrintError("Could not register %s as net frontend\n", name);
+ PrintError("Virtio NIC: Could not register %s as net frontend\n", name);
return -1;
}
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;
+ PrintDebug("Net_states: 0: %p, 1: %p, 2: %p\n", temp_net_states[0], temp_net_states[1], temp_net_states[2]);
+
#endif
return 0;
