#include <palacios/vmm_sprintf.h>
#include <palacios/vmm_vnet.h>
#include <palacios/vmm_lock.h>
+#include <palacios/vmm_util.h>
#include <devices/pci.h>
#define PrintDebug(fmt, args...)
#endif
-#define VIRTIO_NIC_PROFILE
-
#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
#define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
struct virtio_dev_state {
struct vm_device * pci_bus;
struct list_head dev_list;
- struct guest_info * vm;
+ struct v3_vm_info *vm;
};
struct virtio_net_state {
struct virtio_queue ctrl_vq; //index 2, ctrol info from guest
ulong_t pkt_sent, pkt_recv, pkt_drop;
- struct gen_queue * inpkt_q;
struct v3_dev_net_ops * net_ops;
+ v3_lock_t lock;
+
void * backend_data;
struct virtio_dev_state * virtio_dev;
struct list_head dev_link;
};
-#define ETHERNET_PACKET_LEN 1514
-struct eth_pkt {
- uint32_t size; //size of data
- char data[ETHERNET_PACKET_LEN];
-}__attribute__((packed));
-
static int virtio_free(struct vm_device * dev)
{
//virtio->virtio_cfg.status = VIRTIO_NET_S_LINK_UP;
virtio->virtio_cfg.pci_isr = 0;
- virtio->pkt_sent = virtio->pkt_recv = virtio->pkt_drop = 0;
+ if (v3_lock_init(&(virtio->lock)) == -1){
+ PrintError("Virtio NIC: Failure to init lock for net_state\n");
+ }
- virtio->inpkt_q = v3_create_queue();
- v3_init_queue(virtio->inpkt_q);
+ virtio->pkt_sent = virtio->pkt_recv = virtio->pkt_drop = 0;
return 0;
}
-static int pkt_tx(struct virtio_net_state * virtio, struct vring_desc * buf_desc)
+static int pkt_tx(struct guest_info *core, struct virtio_net_state * virtio, struct vring_desc * buf_desc)
{
uint8_t * buf = NULL;
uint32_t len = buf_desc->length;
- PrintDebug("Virtio NIC: Handling Virtio Write, net_state: %p\n", virtio);
+ PrintDebug("Virtio NIC: Virtio Pkt Sending, net_state: %p, pkt size: %d\n", virtio, len);
- if (guest_pa_to_host_va(virtio->virtio_dev->vm, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
+ if (guest_pa_to_host_va(core, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
PrintError("Could not translate buffer address\n");
return -1;
}
- if (virtio->net_ops->send(buf, len, (void *)virtio, NULL) == -1) {
+ if (virtio->net_ops->send(buf, len, virtio->backend_data, NULL) == -1) {
return -1;
}
return 0;
}
-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 guest_info *core,
+ 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;
- if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
+ if (guest_pa_to_host_va(core, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
PrintError("Could not translate buffer address\n");
return -1;
}
return len;
}
-//send data to guest
-int send_pkt_to_guest(struct virtio_net_state * virtio, uchar_t * buf, uint_t size, int raw, void * 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);
-
- virtio->pkt_recv ++;
- if (!raw) {
- data_len -= hdr_len;
- }
- build_receive_header(&hdr, buf, 1);
- if (q->ring_avail_addr == 0) {
- PrintError("Queue is not set\n");
- return -1;
- }
-
- 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;
-
- hdr_desc = &(q->desc[hdr_idx]);
- 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;
- }
-
- memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr));
- 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;
-
- 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;
- }
-
- 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 + 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
- }
-
- 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);
- virtio->virtio_cfg.pci_isr = 0x1;
- }
-
-#ifdef VIRTIO_NIC_PROFILE
- if ((virtio->pkt_recv % 10000) == 0){
- PrintError("Virtio NIC: %p, receieved: %ld, dropped: %ld, sent: %ld\n",
- virtio, virtio->pkt_recv, virtio->pkt_drop, virtio->pkt_sent);
- }
-#endif
-
-
- return offset;
-}
-
-static int virtio_sendto_buf(struct virtio_net_state * net_state, uchar_t * buf, uint_t size) {
- struct eth_pkt *pkt;
-
- pkt = (struct eth_pkt *)V3_Malloc(sizeof(struct eth_pkt));
- if(pkt == NULL){
- PrintError("Virtio NIC: Memory allocate fails\n");
- return -1;
- }
-
- pkt->size = size;
- memcpy(pkt->data, buf, size);
- v3_enqueue(net_state->inpkt_q, (addr_t)pkt);
-
- PrintDebug("Virtio NIC: __virtio_sendto_buf: transmitting packet: (size:%d)\n", (int)pkt->size);
-
- return pkt->size;
-}
-
-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 virtio_sendto_buf(virtio_state, buf, size);
-}
static int get_desc_count(struct virtio_queue * q, int index) {
struct vring_desc * tmp_desc = &(q->desc[index]);
return cnt;
}
-static int handle_ctrl(struct virtio_net_state * dev) {
+static int handle_ctrl(struct guest_info *core, struct virtio_net_state * dev) {
return 0;
}
-static int handle_pkt_tx(struct virtio_net_state * virtio_state)
+static int handle_pkt_tx(struct guest_info *core, struct virtio_net_state * virtio_state)
{
struct virtio_queue * q = &(virtio_state->tx_vq);
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;
+ PrintDebug("Virtio NIC: TX: running on cpu: %d\n", V3_Get_CPU());
- while (q->cur_avail_idx < q->avail->index ||
- (q->idx_overflow && q->cur_avail_idx < (q->avail->index + 65536))) {
+ while (q->cur_avail_idx != q->avail->index) {
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];
int i = 0;
hdr_desc = &(q->desc[desc_idx]);
- if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
+ if (guest_pa_to_host_va(core, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
PrintError("Could not translate block header address\n");
return -1;
}
hdr = (struct virtio_net_hdr*)hdr_addr;
desc_idx = hdr_desc->next;
-
+
for (i = 0; i < desc_cnt - 1; i++) {
struct vring_desc * buf_desc = &(q->desc[desc_idx]);
- if (pkt_tx(virtio_state, buf_desc) == -1) {
+ if (pkt_tx(core, 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++;
- 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)) {
virtio_state->virtio_cfg.pci_isr = 0x1;
}
-#ifdef VIRTIO_NIC_PROFILE
- if(virtio_state->pkt_sent % 10000 == 0)
- PrintError("Virtio NIC: %p, pkt_sent: %ld\n", virtio_state, virtio_state->pkt_sent);
-#endif
+#ifdef CONFIG_VNET_PROFILE
+ if (virtio_state->pkt_sent % 10000 == 0){
+ PrintError("Virtio NIC: sent: %ld, rxed: %ld, dropped: %ld\n",
+ virtio_state->pkt_sent,
+ virtio_state->pkt_recv,
+ virtio_state->pkt_drop);
+ }
+#endif
return 0;
}
-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 guest_info *core,
+ 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_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;
- if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_desc_addr, (addr_t *)&(queue->desc)) == -1) {
+ if (guest_pa_to_host_va(core, queue->ring_desc_addr, (addr_t *)&(queue->desc)) == -1) {
PrintError("Could not translate ring descriptor address\n");
return -1;
}
- if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_avail_addr, (addr_t *)&(queue->avail)) == -1) {
+ if (guest_pa_to_host_va(core, queue->ring_avail_addr, (addr_t *)&(queue->avail)) == -1) {
PrintError("Could not translate ring available address\n");
return -1;
}
- if (guest_pa_to_host_va(virtio_state->virtio_dev->vm, queue->ring_used_addr, (addr_t *)&(queue->used)) == -1) {
+ if (guest_pa_to_host_va(core, queue->ring_used_addr, (addr_t *)&(queue->used)) == -1) {
PrintError("Could not translate ring used address\n");
return -1;
}
struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
int port_idx = port % virtio->io_range_size;
+
PrintDebug("VIRTIO NIC %p Write for port %d (index=%d) len=%d, value=%x\n", private_data,
port, port_idx, length, *(uint32_t *)src);
addr_t pfn = *(uint32_t *)src;
addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
+
+ PrintDebug("Virtio Write: pfn: %p, page_addr %p, queue_idx %d\n", (void *)pfn, (void *)page_addr, queue_idx);
+
switch (queue_idx) {
case 0:
- virtio_setup_queue(virtio, &virtio->rx_vq, pfn, page_addr);
+ virtio_setup_queue(core, virtio, &virtio->rx_vq, pfn, page_addr);
break;
case 1:
- virtio_setup_queue(virtio, &virtio->tx_vq, pfn, page_addr);
+ virtio_setup_queue(core, virtio, &virtio->tx_vq, pfn, page_addr);
break;
case 2:
- virtio_setup_queue(virtio, &virtio->ctrl_vq, pfn, page_addr);
+ virtio_setup_queue(core, virtio, &virtio->ctrl_vq, pfn, page_addr);
break;
default:
break;
if (queue_idx == 0){
PrintDebug("receive queue notification 0, packet get by Guest\n");
} else if (queue_idx == 1){
- if (handle_pkt_tx(virtio) == -1) {
+ if (handle_pkt_tx(core, virtio) == -1) {
PrintError("Could not handle NIC Notification\n");
return -1;
}
} else if (queue_idx == 2){
- if (handle_ctrl(virtio) == -1) {
+ if (handle_ctrl(core, virtio) == -1) {
PrintError("Could not handle NIC Notification\n");
return -1;
}
int port_idx = port % virtio->io_range_size;
uint16_t queue_idx = virtio->virtio_cfg.vring_queue_selector;
- PrintDebug("Virtio NIC %p: Read for port %d (index =%d), length=%d", private_data,
+ PrintDebug("Virtio NIC %p: Read for port %d (index =%d), length=%d\n", private_data,
port, port_idx, length);
switch (port_idx) {
}
+
+
+static int virtio_rx(uint8_t * buf, uint32_t size, void * private_data) {
+ struct virtio_net_state * virtio = (struct virtio_net_state *)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;
+ unsigned long flags;
+ int ret_val = -1;
+ int raw = 1;
+
+ flags = v3_lock_irqsave(virtio->lock);
+
+ PrintDebug("VIRTIO NIC: RX on cpu %d to virtio nic %p, size:%d\n", V3_Get_CPU(), virtio, size);
+
+ virtio->pkt_recv ++;
+
+ if (!raw){
+ data_len -= hdr_len;
+ }
+
+ build_receive_header(&hdr, buf, raw);
+
+ if (q->ring_avail_addr == 0) {
+ PrintError("Queue is not set\n");
+ goto exit;
+ }
+
+ if (q->cur_avail_idx != q->avail->index){
+ 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;
+
+ hdr_desc = &(q->desc[hdr_idx]);
+ if (guest_pa_to_host_va(&(virtio->virtio_dev->vm->cores[0]), hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
+ PrintError("Could not translate receive buffer address\n");
+ ret_val = -1;
+ goto exit;
+ }
+
+ memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr));
+ 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;
+
+ len = copy_data_to_desc(&(virtio->virtio_dev->vm->cores[0]), virtio, buf_desc, buf + offset, data_len - offset);
+ offset += len;
+ if (offset < data_len) {
+ buf_desc->flags = VIRTIO_NEXT_FLAG;
+ }
+ buf_desc->length = len;
+ }
+
+ 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 + hdr_len; // This should be the total length of data sent to guest (header+pkt_data)
+ q->used->index++;
+
+ q->cur_avail_idx++;
+ } else {
+ virtio->pkt_drop++;
+ goto exit;
+ }
+
+ 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);
+ virtio->virtio_cfg.pci_isr = 0x1;
+ }
+
+ ret_val = offset;
+
+exit:
+
+#ifdef CONFIG_VNET_PROFILE
+ if (virtio->pkt_recv % 100000 == 0){
+ PrintError("Virtio NIC: sent: %ld, rxed: %ld, dropped: %ld\n",
+ virtio->pkt_sent,
+ virtio->pkt_recv,
+ virtio->pkt_drop);
+ }
+#endif
+
+ v3_unlock_irqrestore(virtio->lock, flags);
+
+ return ret_val;
+}
+
+
static struct v3_device_ops dev_ops = {
.free = virtio_free,
.reset = NULL,
net_state->net_ops = ops;
net_state->backend_data = private_data;
+ ops->recv = virtio_rx;
+ ops->frontend_data = net_state;
+
return 0;
}
INIT_LIST_HEAD(&(virtio_state->dev_list));
virtio_state->pci_bus = pci_bus;
- //virtio_state->vm = vm;
+ virtio_state->vm = vm;
struct vm_device * dev = v3_allocate_device(name, &dev_ops, virtio_state);
if (v3_attach_device(vm, dev) == -1) {
