#define PrintDebug(fmt, args...)
#endif
+#define TX_QUEUE_SIZE 4096
+#define RX_QUEUE_SIZE 4096
+#define CTRL_QUEUE_SIZE 64
+
+/* The feature bitmap for virtio nic
+ * from Linux */
+#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 */
+#define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
+#define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
+#define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */
+#define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */
+#define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */
+#define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */
+#define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
+#define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */
+#define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */
+#define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */
+#define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
+#define VIRTIO_NET_F_STATUS 16 /* virtio_net_config.status available */
+
+/* Port to get virtio config */
+#define VIRTIO_NET_CONFIG 20
+
#define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
+/* for gso_type in virtio_net_hdr */
+#define VIRTIO_NET_HDR_GSO_NONE 0
+#define VIRTIO_NET_HDR_GSO_TCPV4 1 /* GSO frame, IPv4 TCP (TSO) */
+#define VIRTIO_NET_HDR_GSO_UDP 3 /* GSO frame, IPv4 UDP (UFO) */
+#define VIRTIO_NET_HDR_GSO_TCPV6 4 /* GSO frame, IPv6 TCP */
+#define VIRTIO_NET_HDR_GSO_ECN 0x80 /* TCP has ECN set */
-struct virtio_net_hdr {
- uint8_t flags;
-
- uint8_t gso_type;
- uint16_t hdr_len; /* Ethernet + IP + tcp/udp hdrs */
- uint16_t gso_size; /* Bytes to append to hdr_len per frame */
- uint16_t csum_start; /* Position to start checksumming from */
- uint16_t csum_offset; /* Offset after that to place checksum */
-}__attribute__((packed));
+/* for flags in virtio_net_hdr */
+#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /* Use csum_start, csum_offset */
-struct virtio_net_hdr_mrg_rxbuf {
- struct virtio_net_hdr hdr;
- uint16_t num_buffers; /* Number of merged rx buffers */
-};
-
-#define TX_QUEUE_SIZE 256
-#define RX_QUEUE_SIZE 4096
-#define CTRL_QUEUE_SIZE 64
+/* First element of the scatter-gather list, used with GSO or CSUM features */
+struct virtio_net_hdr
+{
+ uint8_t flags;
+ uint8_t gso_type;
+ uint16_t hdr_len; /* Ethernet + IP + tcp/udp hdrs */
+ uint16_t gso_size; /* Bytes to append to hdr_len per frame */
+ uint16_t csum_start; /* Position to start checksumming from */
+ uint16_t csum_offset; /* Offset after that to place checksum */
+}__attribute__((packed));
-#define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
-#define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
-#define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
-#define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
-#define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */
-/* Port to get virtio config */
-#define VIRTIO_NET_CONFIG 20
+/* The header to use when the MRG_RXBUF
+ * feature has been negotiated. */
+struct virtio_net_hdr_mrg_rxbuf {
+ struct virtio_net_hdr hdr;
+ uint16_t num_buffers; /* Number of merged rx buffers */
+};
struct virtio_net_config
{
struct virtio_net_config net_cfg;
struct virtio_config virtio_cfg;
+ struct v3_vm_info * vm;
struct vm_device * dev;
struct pci_device * pci_dev;
int io_range_size;
struct virtio_queue ctrl_vq; /* idx 2*/
struct v3_timer * timer;
+ void * poll_thread;
- struct nic_statistics statistics;
+ struct nic_statistics stats;
struct v3_dev_net_ops * net_ops;
v3_lock_t rx_lock, tx_lock;
uint8_t tx_notify, rx_notify;
uint32_t tx_pkts, rx_pkts;
- uint64_t past_ms;
+ uint64_t past_us;
void * backend_data;
struct virtio_dev_state * virtio_dev;
struct list_head dev_link;
};
+
static int virtio_init_state(struct virtio_net_state * virtio)
{
virtio->rx_vq.queue_size = RX_QUEUE_SIZE;
virtio->virtio_cfg.pci_isr = 0;
- virtio->virtio_cfg.host_features = 0 | (1 << VIRTIO_NET_F_MAC) |
- (1 << VIRTIO_NET_F_HOST_UFO) |
- (1 << VIRTIO_NET_F_HOST_TSO4);
+ virtio->virtio_cfg.host_features = 0 | (1 << VIRTIO_NET_F_MAC);
+ // (1 << VIRTIO_NET_F_GSO) |
+ // (1 << VIRTIO_NET_F_HOST_UFO) |
+ // (1 << VIRTIO_NET_F_HOST_TSO4);
if ((v3_lock_init(&(virtio->rx_lock)) == -1) ||
(v3_lock_init(&(virtio->tx_lock)) == -1)){
}
static int tx_one_pkt(struct guest_info * core,
- struct virtio_net_state * virtio,
- struct vring_desc * buf_desc)
+ struct virtio_net_state * virtio,
+ struct vring_desc * buf_desc)
{
uint8_t * buf = NULL;
uint32_t len = buf_desc->length;
+ int synchronize = 1; // (virtio->tx_notify == 1)?1:0;
if (v3_gpa_to_hva(core, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
PrintDebug("Could not translate buffer address\n");
return -1;
}
- if(virtio->net_ops->send(buf, len, virtio->backend_data) >= 0){
- virtio->statistics.tx_pkts ++;
- virtio->statistics.tx_bytes += len;
+ V3_Net_Print(2, "Virtio-NIC: virtio_tx: size: %d\n", len);
+ if(v3_net_debug >= 4){
+ v3_hexdump(buf, len, NULL, 0);
+ }
- return 0;
+ if(virtio->net_ops->send(buf, len, synchronize, virtio->backend_data) < 0){
+ virtio->stats.tx_dropped ++;
+ return -1;
}
- virtio->statistics.tx_dropped ++;
+ virtio->stats.tx_pkts ++;
+ virtio->stats.tx_bytes += len;
- return -1;
+ return 0;
}
-static int
-copy_data_to_desc(struct guest_info * core,
+static inline int copy_data_to_desc(struct guest_info * core,
struct virtio_net_state * virtio_state,
struct vring_desc * desc,
uchar_t * buf,
uint8_t * desc_buf = NULL;
if (v3_gpa_to_hva(core, desc->addr_gpa, (addr_t *)&(desc_buf)) == -1) {
- PrintError("Could not translate buffer address\n");
+ PrintDebug("Could not translate buffer address\n");
return -1;
}
len = (desc->length < buf_len)?(desc->length - offset):buf_len;
}
-static int get_desc_count(struct virtio_queue * q, int index) {
+static inline int get_desc_count(struct virtio_queue * q, int index) {
struct vring_desc * tmp_desc = &(q->desc[index]);
int cnt = 1;
queue->used->flags |= VRING_NO_NOTIFY_FLAG;
}
-
-/* interrupt the guest, so the guest core get EXIT to Palacios */
-static inline void notify_guest(struct virtio_net_state * virtio){
- v3_interrupt_cpu(virtio->virtio_dev->vm, virtio->virtio_dev->vm->cores[0].cpu_id, 0);
-}
-
-
-/* guest free some pkts for rx queue */
-static int handle_rx_queue_kick(struct guest_info * core,
- struct virtio_net_state * virtio)
-{
- return 0;
-}
-
-
-static int handle_ctrl(struct guest_info * core,
- struct virtio_net_state * virtio) {
-
- return 0;
-}
-
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;
int txed = 0;
unsigned long flags;
flags = v3_lock_irqsave(virtio_state->tx_lock);
while (q->cur_avail_idx != q->avail->index) {
+ struct virtio_net_hdr *hdr = NULL;
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 desc_cnt = get_desc_count(q, desc_idx);
- uint32_t req_len = 0;
- int i = 0;
+
+ if(desc_cnt > 2){
+ PrintError("VNIC: merged rx buffer not supported, desc_cnt %d\n", desc_cnt);
+ goto exit_error;
+ }
hdr_desc = &(q->desc[desc_idx]);
if (v3_gpa_to_hva(core, hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
hdr = (struct virtio_net_hdr *)hdr_addr;
desc_idx = hdr_desc->next;
- if(desc_cnt > 2){
- PrintError("VNIC: merged rx buffer not supported, desc_cnt %d\n", desc_cnt);
+ /* here we assumed that one ethernet pkt is not splitted into multiple buffer */
+ struct vring_desc * buf_desc = &(q->desc[desc_idx]);
+ if (tx_one_pkt(core, virtio_state, buf_desc) == -1) {
+ PrintError("Virtio NIC: Error handling nic operation\n");
goto exit_error;
}
-
- /* here we assumed that one ethernet pkt is not splitted into multiple virtio buffer */
- for (i = 0; i < desc_cnt - 1; i++) {
- struct vring_desc * buf_desc = &(q->desc[desc_idx]);
- if (tx_one_pkt(core, virtio_state, buf_desc) == -1) {
- PrintError("Error handling nic operation\n");
- goto exit_error;
- }
-
- req_len += buf_desc->length;
- desc_idx = buf_desc->next;
- }
-
+
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 = req_len; /* What do we set this to???? */
+ q->used->ring[q->used->index % q->queue_size].length = buf_desc->length; /* What do we set this to???? */
q->used->index ++;
q->cur_avail_idx ++;
v3_unlock_irqrestore(virtio_state->tx_lock, flags);
- if (txed && !(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
+ if (virtio_state->virtio_cfg.pci_isr == 0 &&
+ txed && !(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
v3_pci_raise_irq(virtio_state->virtio_dev->pci_bus, 0, virtio_state->pci_dev);
virtio_state->virtio_cfg.pci_isr = 0x1;
- virtio_state->statistics.interrupts ++;
+ virtio_state->stats.rx_interrupts ++;
+ }
+
+ if(txed > 0) {
+ V3_Net_Print(2, "Virtio Handle TX: txed pkts: %d\n", txed);
}
return 0;
break;
case 1:
virtio_setup_queue(core, virtio, &virtio->tx_vq, pfn, page_addr);
+ if(virtio->tx_notify == 0){
+ disable_cb(&virtio->tx_vq);
+ V3_THREAD_WAKEUP(virtio->poll_thread);
+ }
break;
case 2:
virtio_setup_queue(core, virtio, &virtio->ctrl_vq, pfn, page_addr);
{
uint16_t queue_idx = *(uint16_t *)src;
if (queue_idx == 0){
- if(handle_rx_queue_kick(core, virtio) == -1){
- PrintError("Could not handle Virtio NIC rx kick\n");
- return -1;
- }
+ /* receive queue refill */
+ virtio->stats.tx_interrupts ++;
} else if (queue_idx == 1){
if (handle_pkt_tx(core, virtio) == -1) {
PrintError("Could not handle Virtio NIC tx kick\n");
return -1;
}
+ virtio->stats.tx_interrupts ++;
} else if (queue_idx == 2){
- if (handle_ctrl(core, virtio) == -1) {
- PrintError("Could not handle Virtio NIC ctrl kick\n");
- return -1;
- }
+ /* ctrl */
} else {
PrintError("Wrong queue index %d\n", queue_idx);
}
case HOST_FEATURES_PORT:
if (length != 4) {
PrintError("Illegal read length for host features\n");
- return -1;
+ //return -1;
}
*(uint32_t *)dst = virtio->virtio_cfg.host_features;
break;
uint32_t offset = 0;
unsigned long flags;
-#ifdef CONFIG_DEBUG_VIRTIO_NET
- PrintDebug("Virtio-NIC: virtio_rx: size: %d\n", size);
- v3_hexdump(buf, size, NULL, 0);
-#endif
+ V3_Net_Print(2, "Virtio-NIC: virtio_rx: size: %d\n", size);
+ if(v3_net_debug >= 4){
+ v3_hexdump(buf, size, NULL, 0);
+ }
flags = v3_lock_irqsave(virtio->rx_lock);
memset(&hdr, 0, sizeof(struct virtio_net_hdr_mrg_rxbuf));
if (q->ring_avail_addr == 0) {
- PrintDebug("Queue is not set\n");
+ V3_Net_Print(2, "Virtio NIC: RX Queue not set\n");
+ virtio->stats.rx_dropped ++;
goto err_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;
+ uint16_t hdr_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
struct vring_desc * hdr_desc = NULL;
+ struct vring_desc * buf_desc = NULL;
+ uint32_t len;
hdr_desc = &(q->desc[hdr_idx]);
if (v3_gpa_to_hva(&(virtio->virtio_dev->vm->cores[0]), hdr_desc->addr_gpa, &(hdr_addr)) == -1) {
- PrintDebug("Could not translate receive buffer address\n");
+ V3_Net_Print(2, "Virtio NIC: Could not translate receive buffer address\n");
+ virtio->stats.rx_dropped ++;
goto err_exit;
}
- hdr.num_buffers = 1;
- memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr_mrg_rxbuf));
- if (offset >= data_len) {
- hdr_desc->flags &= ~VIRTIO_NEXT_FLAG;
- }
- struct vring_desc * buf_desc = NULL;
- for (buf_idx = hdr_desc->next; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
+#if 0 /* merged buffer */
+ for(buf_idx = hdr_desc->next; offset < data_len; buf_idx = q->desc[hdr_idx].next) {
uint32_t len = 0;
buf_desc = &(q->desc[buf_idx]);
buf_desc->flags = VIRTIO_NEXT_FLAG;
}
buf_desc->length = len;
+ hdr.num_buffers ++;
}
buf_desc->flags &= ~VIRTIO_NEXT_FLAG;
-
+ memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr_mrg_rxbuf));
+#endif
+
+ hdr.num_buffers = 1;
+ memcpy((void *)hdr_addr, &hdr, sizeof(struct virtio_net_hdr_mrg_rxbuf));
+ if (data_len == 0) {
+ hdr_desc->flags &= ~VIRTIO_NEXT_FLAG;
+ }
+
+ buf_idx = hdr_desc->next;
+ buf_desc = &(q->desc[buf_idx]);
+ len = copy_data_to_desc(&(virtio->virtio_dev->vm->cores[0]), virtio, buf_desc, buf, data_len, 0);
+ if (len < data_len) {
+ V3_Net_Print(2, "Virtio NIC: ring buffer len less than pkt size, merged buffer not supported\n");
+ virtio->stats.rx_dropped ++;
+
+ goto err_exit;
+ }
+ buf_desc->flags &= ~VIRTIO_NEXT_FLAG;
+
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++;
- virtio->statistics.rx_pkts ++;
- virtio->statistics.rx_bytes += size;
+ virtio->stats.rx_pkts ++;
+ virtio->stats.rx_bytes += size;
} else {
- virtio->statistics.rx_dropped ++;
+ V3_Net_Print(2, "Virtio NIC: Guest RX queue is full\n");
+ virtio->stats.rx_dropped ++;
+
+ /* kick guest to refill the queue */
+ virtio->virtio_cfg.pci_isr = 0x1;
+ v3_pci_raise_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
+ v3_interrupt_cpu(virtio->virtio_dev->vm, virtio->virtio_dev->vm->cores[0].cpu_id, 0);
+ virtio->stats.rx_interrupts ++;
goto err_exit;
}
- if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
+ if (virtio->virtio_cfg.pci_isr == 0 &&
+ !(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
PrintDebug("Raising IRQ %d\n", virtio->pci_dev->config_header.intr_line);
-
+
+ virtio->virtio_cfg.pci_isr = 0x1;
v3_pci_raise_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
- virtio->virtio_cfg.pci_isr = 0x1;
- virtio->statistics.interrupts ++;
+
+ virtio->stats.rx_interrupts ++;
}
v3_unlock_irqrestore(virtio->rx_lock, flags);
- /* notify guest if guest is running */
+ /* notify guest if it is in guest mode */
+ /* ISSUE: What is gonna happen if guest thread is running on the same core as this thread? */
if(virtio->rx_notify == 1){
v3_interrupt_cpu(virtio->virtio_dev->vm, virtio->virtio_dev->vm->cores[0].cpu_id, 0);
}
};
-static void virtio_nic_poll(struct v3_vm_info * vm, int budget, void * data){
- struct virtio_net_state * virtio = (struct virtio_net_state *)data;
+static int virtio_tx_flush(void * args){
+ struct virtio_net_state *virtio = (struct virtio_net_state *)args;
+
+ V3_Print("Virtio TX Poll Thread Starting for %s\n", virtio->vm->name);
- if(virtio->tx_notify == 0){
- handle_pkt_tx(&(vm->cores[0]), virtio);
+ while(1){
+ if(virtio->tx_notify == 0){
+ handle_pkt_tx(&(virtio->vm->cores[0]), virtio);
+ v3_yield(NULL);
+ }else {
+ V3_THREAD_SLEEP();
+ }
}
+
+ return 0;
}
static int register_dev(struct virtio_dev_state * virtio,
#define RATE_UPPER_THRESHOLD 10 /* 10000 pkts per second, around 100Mbits */
#define RATE_LOWER_THRESHOLD 1
-#define PROFILE_PERIOD 50 /*50ms*/
+#define PROFILE_PERIOD 10000 /*us*/
-/* Timer Functions */
static void virtio_nic_timer(struct guest_info * core,
uint64_t cpu_cycles, uint64_t cpu_freq,
void * priv_data) {
struct virtio_net_state * net_state = (struct virtio_net_state *)priv_data;
- uint64_t period_ms;
+ uint64_t period_us;
+ static int profile_ms = 0;
- period_ms = cpu_cycles/cpu_freq;
- net_state->past_ms += period_ms;
+ period_us = (1000*cpu_cycles)/cpu_freq;
+ net_state->past_us += period_us;
- if(net_state->past_ms > PROFILE_PERIOD){
+#if 0
+ if(net_state->past_us > PROFILE_PERIOD){
uint32_t tx_rate, rx_rate;
- tx_rate = (net_state->statistics.tx_pkts - net_state->tx_pkts)/net_state->past_ms; /* pkts/per ms */
- rx_rate = (net_state->statistics.rx_pkts - net_state->rx_pkts)/net_state->past_ms;
+ tx_rate = (net_state->stats.tx_pkts - net_state->tx_pkts)/(net_state->past_us/1000); /* pkts/per ms */
+ rx_rate = (net_state->stats.rx_pkts - net_state->rx_pkts)/(net_state->past_us/1000);
- net_state->tx_pkts = net_state->statistics.tx_pkts;
- net_state->rx_pkts = net_state->statistics.rx_pkts;
+ net_state->tx_pkts = net_state->stats.tx_pkts;
+ net_state->rx_pkts = net_state->stats.rx_pkts;
if(tx_rate > RATE_UPPER_THRESHOLD && net_state->tx_notify == 1){
V3_Print("Virtio NIC: Switch TX to VMM driven mode\n");
disable_cb(&(net_state->tx_vq));
net_state->tx_notify = 0;
+ V3_THREAD_WAKEUP(net_state->poll_thread);
}
if(tx_rate < RATE_LOWER_THRESHOLD && net_state->tx_notify == 0){
}
if(rx_rate > RATE_UPPER_THRESHOLD && net_state->rx_notify == 1){
- PrintDebug("Virtio NIC: Switch RX to VMM None notify mode\n");
+ V3_Print("Virtio NIC: Switch RX to VMM None notify mode\n");
net_state->rx_notify = 0;
}
if(rx_rate < RATE_LOWER_THRESHOLD && net_state->rx_notify == 0){
- PrintDebug("Virtio NIC: Switch RX to VMM notify mode\n");
+ V3_Print("Virtio NIC: Switch RX to VMM notify mode\n");
net_state->rx_notify = 1;
}
- net_state->past_ms = 0;
+ net_state->past_us = 0;
}
-}
+#endif
+ profile_ms += period_us/1000;
+ if(profile_ms > 20000){
+ V3_Net_Print(1, "Virtio NIC: TX: Pkt: %lld, Bytes: %lld\n\t\tRX Pkt: %lld. Bytes: %lld\n\t\tDropped: tx %lld, rx %lld\nInterrupts: tx %d, rx %d\nTotal Exit: %lld\n",
+ net_state->stats.tx_pkts, net_state->stats.tx_bytes,
+ net_state->stats.rx_pkts, net_state->stats.rx_bytes,
+ net_state->stats.tx_dropped, net_state->stats.rx_dropped,
+ net_state->stats.tx_interrupts, net_state->stats.rx_interrupts,
+ net_state->vm->cores[0].num_exits);
+ profile_ms = 0;
+ }
+}
static struct v3_timer_ops timer_ops = {
.update_timer = virtio_nic_timer,
memset(net_state, 0, sizeof(struct virtio_net_state));
register_dev(virtio, net_state);
+ net_state->vm = info;
net_state->net_ops = ops;
net_state->backend_data = private_data;
net_state->virtio_dev = virtio;
- net_state->tx_notify = 1;
- net_state->rx_notify = 1;
-
+ net_state->tx_notify = 0;
+ net_state->rx_notify = 0;
+
net_state->timer = v3_add_timer(&(info->cores[0]),&timer_ops,net_state);
ops->recv = virtio_rx;
- ops->poll = virtio_nic_poll;
ops->frontend_data = net_state;
memcpy(ops->fnt_mac, virtio->mac, ETH_ALEN);
+ net_state->poll_thread = V3_CREATE_THREAD(virtio_tx_flush, (void *)net_state, "Virtio_Poll");
+
return 0;
}
if (macstr != NULL && !str2mac(macstr, virtio_state->mac)) {
PrintDebug("Virtio NIC: Mac specified %s\n", macstr);
- PrintDebug("MAC: %x:%x:%x:%x:%x:%x\n", virtio_state->mac[0],
- virtio_state->mac[1],
- virtio_state->mac[2],
- virtio_state->mac[3],
- virtio_state->mac[4],
- virtio_state->mac[5]);
}else {
- PrintDebug("Virtio NIC: MAC not specified\n");
random_ethaddr(virtio_state->mac);
}
#define PrintDebug(fmt, args...)
#endif
+int v3_net_debug = 0;
+
struct eth_hdr {
uint8_t dst_mac[ETH_ALEN];
uint8_t src_mac[ETH_ALEN];
struct v3_vnet_dev_ops dev_ops;
void * private_data;
- int active;
-
- uint64_t bytes_tx, bytes_rx;
- uint32_t pkts_tx, pkt_rx;
-
struct list_head node;
} __attribute__((packed));
uint8_t type;
- int active;
void * private_data;
} __attribute__((packed));
} __attribute__((packed));
+struct queue_entry{
+ uint8_t use;
+ struct v3_vnet_pkt pkt;
+ uint8_t data[ETHERNET_PACKET_LEN];
+};
+
+#define VNET_QUEUE_SIZE 10240
+struct vnet_queue {
+ struct queue_entry buf[VNET_QUEUE_SIZE];
+ int head, tail;
+ int count;
+ v3_lock_t lock;
+};
+
static struct {
struct list_head routes;
struct list_head devs;
v3_lock_t lock;
struct vnet_stat stats;
- struct hashtable * route_cache;
-} vnet_state;
+ void * pkt_flush_thread;
+ struct vnet_queue pkt_q;
+ struct hashtable * route_cache;
+} vnet_state;
+
#ifdef CONFIG_DEBUG_VNET
static inline void mac_to_string(uint8_t * mac, char * buf) {
return 0;
}
-static int look_into_cache(const struct v3_vnet_pkt * pkt, struct route_list ** routes) {
+static int look_into_cache(const struct v3_vnet_pkt * pkt,
+ struct route_list ** routes) {
*routes = (struct route_list *)v3_htable_search(vnet_state.route_cache, (addr_t)(pkt->hash_buf));
return 0;
int max_rank = 0;
struct list_head match_list;
struct eth_hdr * hdr = (struct eth_hdr *)(pkt->data);
-// uint8_t src_type = pkt->src_type;
- // uint32_t src_link = pkt->src_id;
+ // uint8_t src_type = pkt->src_type;
+ // uint32_t src_link = pkt->src_id;
#ifdef CONFIG_DEBUG_VNET
{
}
-int v3_vnet_send_pkt(struct v3_vnet_pkt * pkt, void * private_data) {
+int vnet_tx_one_pkt(struct v3_vnet_pkt * pkt, void * private_data) {
struct route_list * matched_routes = NULL;
unsigned long flags;
int i;
-#ifdef CONFIG_DEBUG_VNET
- {
- int cpu = V3_Get_CPU();
- PrintDebug("VNET/P Core: cpu %d: pkt (size %d, src_id:%d, src_type: %d, dst_id: %d, dst_type: %d)\n",
+ int cpu = V3_Get_CPU();
+ V3_Net_Print(2, "VNET/P Core: cpu %d: pkt (size %d, src_id:%d, src_type: %d, dst_id: %d, dst_type: %d)\n",
cpu, pkt->size, pkt->src_id,
pkt->src_type, pkt->dst_id, pkt->dst_type);
- }
-#endif
+ if(v3_net_debug >= 4){
+ v3_hexdump(pkt->data, pkt->size, NULL, 0);
+ }
flags = v3_lock_irqsave(vnet_state.lock);
for (i = 0; i < matched_routes->num_routes; i++) {
struct vnet_route_info * route = matched_routes->routes[i];
- if (route->route_def.dst_type == LINK_EDGE) {
- struct vnet_brg_dev *bridge = vnet_state.bridge;
- pkt->dst_type = LINK_EDGE;
- pkt->dst_id = route->route_def.dst_id;
+ if (route->route_def.dst_type == LINK_EDGE) {
+ struct vnet_brg_dev * bridge = vnet_state.bridge;
+ pkt->dst_type = LINK_EDGE;
+ pkt->dst_id = route->route_def.dst_id;
- if (bridge == NULL || (bridge->active == 0)) {
- PrintDebug("VNET/P Core: No active bridge to sent data to\n");
+ if (bridge == NULL) {
+ V3_Net_Print(2, "VNET/P Core: No active bridge to sent data to\n");
continue;
}
if(bridge->brg_ops.input(bridge->vm, pkt, bridge->private_data) < 0){
- PrintDebug("VNET/P Core: Packet not sent properly to bridge\n");
+ V3_Net_Print(2, "VNET/P Core: Packet not sent properly to bridge\n");
continue;
}
vnet_state.stats.tx_bytes += pkt->size;
vnet_state.stats.tx_pkts ++;
} else if (route->route_def.dst_type == LINK_INTERFACE) {
- if (route->dst_dev == NULL || route->dst_dev->active == 0){
- PrintDebug("VNET/P Core: No active device to sent data to\n");
+ if (route->dst_dev == NULL){
+ V3_Net_Print(2, "VNET/P Core: No active device to sent data to\n");
continue;
}
if(route->dst_dev->dev_ops.input(route->dst_dev->vm, pkt, route->dst_dev->private_data) < 0) {
- PrintDebug("VNET/P Core: Packet not sent properly\n");
+ V3_Net_Print(2, "VNET/P Core: Packet not sent properly\n");
continue;
}
vnet_state.stats.tx_bytes += pkt->size;
return 0;
}
+
+static int vnet_pkt_enqueue(struct v3_vnet_pkt * pkt){
+ unsigned long flags;
+ struct queue_entry * entry;
+ struct vnet_queue * q = &(vnet_state.pkt_q);
+
+ flags = v3_lock_irqsave(q->lock);
+
+ if (q->count >= VNET_QUEUE_SIZE){
+ V3_Net_Print(1, "VNET Queue overflow!\n");
+ v3_unlock_irqrestore(q->lock, flags);
+ return -1;
+ }
+
+ q->count ++;
+ entry = &(q->buf[q->tail++]);
+ q->tail %= VNET_QUEUE_SIZE;
+
+ v3_unlock_irqrestore(q->lock, flags);
+
+ /* this is ugly, but should happen very unlikely */
+ while(entry->use);
+
+ entry->pkt.data = entry->data;
+ memcpy(&(entry->pkt), pkt, sizeof(struct v3_vnet_pkt));
+ memcpy(entry->data, pkt->data, pkt->size);
+
+ entry->use = 1;
+
+ return 0;
+}
+
+
+int v3_vnet_send_pkt(struct v3_vnet_pkt * pkt, void * private_data, int synchronize) {
+ if(synchronize){
+ vnet_tx_one_pkt(pkt, NULL);
+ }else {
+ vnet_pkt_enqueue(pkt);
+ V3_Net_Print(2, "VNET/P Core: Put pkt into Queue: pkt size %d\n", pkt->size);
+ }
+
+ return 0;
+}
+
int v3_vnet_add_dev(struct v3_vm_info * vm, uint8_t * mac,
struct v3_vnet_dev_ops *ops,
void * priv_data){
memcpy(new_dev->mac_addr, mac, 6);
new_dev->dev_ops.input = ops->input;
- new_dev->dev_ops.poll = ops->poll;
new_dev->private_data = priv_data;
new_dev->vm = vm;
new_dev->dev_id = 0;
- new_dev->active = 1;
flags = v3_lock_irqsave(vnet_state.lock);
}
-
int v3_vnet_del_dev(int dev_id){
struct vnet_dev * dev = NULL;
unsigned long flags;
return 0;
}
+
int v3_vnet_stat(struct vnet_stat * stats){
stats->rx_bytes = vnet_state.stats.rx_bytes;
struct vnet_brg_dev * tmp_bridge = NULL;
flags = v3_lock_irqsave(vnet_state.lock);
-
if (vnet_state.bridge == NULL) {
bridge_free = 1;
vnet_state.bridge = (void *)1;
}
-
v3_unlock_irqrestore(vnet_state.lock, flags);
if (bridge_free == 0) {
tmp_bridge->brg_ops.input = ops->input;
tmp_bridge->brg_ops.poll = ops->poll;
tmp_bridge->private_data = priv_data;
- tmp_bridge->active = 1;
tmp_bridge->type = type;
/* make this atomic to avoid possible race conditions */
}
-void v3_vnet_do_poll(struct v3_vm_info * vm){
- struct vnet_dev * dev = NULL;
+static int vnet_tx_flush(void *args){
+ unsigned long flags;
+ struct queue_entry * entry;
+ struct vnet_queue * q = &(vnet_state.pkt_q);
- /* TODO: run this on separate threads
- * round-robin schedule, with maximal budget for each poll
- */
- list_for_each_entry(dev, &(vnet_state.devs), node) {
- if(dev->dev_ops.poll != NULL){
- dev->dev_ops.poll(vm, -1, dev->private_data);
- }
+ V3_Print("VNET/P Handing Pkt Thread Starting ....\n");
+
+ //V3_THREAD_SLEEP();
+ /* we need thread sleep/wakeup in Palacios */
+ while(1){
+ flags = v3_lock_irqsave(q->lock);
+
+ if (q->count <= 0){
+ v3_unlock_irqrestore(q->lock, flags);
+ v3_yield(NULL);
+ //V3_THREAD_SLEEP();
+ }else {
+ q->count --;
+ entry = &(q->buf[q->head++]);
+ q->head %= VNET_QUEUE_SIZE;
+
+ v3_unlock_irqrestore(q->lock, flags);
+
+ /* this is ugly, but should happen very unlikely */
+ while(!entry->use);
+ vnet_tx_one_pkt(&(entry->pkt), NULL);
+ entry->use = 0;
+
+ V3_Net_Print(2, "vnet_tx_flush: pkt (size %d)\n", entry->pkt.size);
+ }
}
}
-
int v3_init_vnet() {
memset(&vnet_state, 0, sizeof(vnet_state));
}
vnet_state.route_cache = v3_create_htable(0, &hash_fn, &hash_eq);
-
if (vnet_state.route_cache == NULL) {
PrintError("VNET/P Core: Fails to initiate route cache\n");
return -1;
}
+ v3_lock_init(&(vnet_state.pkt_q.lock));
+
+ vnet_state.pkt_flush_thread = V3_CREATE_THREAD(vnet_tx_flush, NULL, "VNET_Pkts");
+
PrintDebug("VNET/P Core is initiated\n");
return 0;
