#include <palacios/vmm_lock.h>
#include <palacios/vmm_util.h>
#include <devices/pci.h>
+#include <palacios/vmm_ethernet.h>
#ifndef CONFIG_DEBUG_VIRTIO_NET
#define VIRTIO_NET_S_LINK_UP 1 /* Link is up */
#define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
+
struct virtio_net_hdr {
uint8_t flags;
#define TX_QUEUE_SIZE 64
#define RX_QUEUE_SIZE 1024
#define CTRL_QUEUE_SIZE 64
-#define ETH_ALEN 6
#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. */
+/* this is not how virtio supposed to be,
+ * we may need a separately implemented virtio_pci
+ * In order to make guest to get virtio MAC from host
+ * I added it here -- Lei
+ */
+ #define VIRTIO_NET_CONFIG 20
+
+
struct virtio_net_config
{
uint8_t mac[ETH_ALEN]; /* VIRTIO_NET_F_MAC */
struct vm_device * pci_bus;
struct list_head dev_list;
struct v3_vm_info *vm;
+
+ char mac[ETH_ALEN];
};
struct virtio_net_state {
int buffed_rx;
int tx_disabled; /* stop TX pkts from guest */
- uint16_t cur_notify_tx_idx; /*for used in update_tx_queue */
uint64_t pkt_sent, pkt_recv, pkt_drop;
- uint64_t tx_stop_times, rx_stop_times, tx_poll_times, rx_ipi_num;
struct v3_dev_net_ops * net_ops;
v3_lock_t rx_lock, tx_lock;
#define ERR_VIRTIO_TXQ_DISABLED 6
-static int virtio_free(struct vm_device * dev)
-{
-
- return 0;
-}
+
static int virtio_init_state(struct virtio_net_state * virtio)
{
virtio->virtio_cfg.pci_isr = 0;
- virtio->virtio_cfg.host_features = 0; // (1 << VIRTIO_NET_F_MAC);
+ virtio->virtio_cfg.host_features = 0 | (1 << VIRTIO_NET_F_MAC);
if ((v3_lock_init(&(virtio->rx_lock)) == -1) ||
- (v3_lock_init(&(virtio->tx_lock)) == -1)){
+ (v3_lock_init(&(virtio->tx_lock)) == -1)){
PrintError("Virtio NIC: Failure to init locks for net_state\n");
}
return 0;
}
-static int pkt_tx(struct guest_info *core, 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;
return -ERR_VIRTIO_OTHER;
}
- return virtio->net_ops->send(buf, len, virtio->backend_data, NULL);
+ return virtio->net_ops->send(buf, len, virtio->backend_data);
}
-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,
- uint_t offset)
+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,
+ uint_t offset)
{
uint32_t len;
uint8_t * desc_buf = NULL;
queue->used->flags |= VRING_NO_NOTIFY_FLAG;
}
+
/* interrupt the guest, so the guest core get EXIT to Palacios
* this happens when there are either incoming pkts for the guest
* or the guest can start TX pkts again */
/* guest free some pkts from rx queue */
-static int handle_rx_kick(struct guest_info *core, struct virtio_net_state * virtio)
+static int handle_rx_kick(struct guest_info *core,
+ struct virtio_net_state * virtio)
{
unsigned long flags;
flags = v3_lock_irqsave(virtio->rx_lock);
- virtio->net_ops->start_rx(virtio->backend_data);
- disable_cb(&virtio->rx_vq);
+ if(virtio->net_ops->start_rx != NULL){
+ virtio->net_ops->start_rx(virtio->backend_data);
+ }
+ //disable_cb(&virtio->rx_vq);
v3_unlock_irqrestore(virtio->rx_lock, flags);
return 0;
}
-#ifdef CONFIG_VNET_PROFILE
-static void print_profile_info(struct virtio_net_state *virtio){
- PrintError("Virtio NIC: %p, sent: %lld, rxed: %lld, dropped: %lld, \
- tx_stop: %lld, rx_stop: %lld, poll_time: %lld, rx_ipi: %lld\n",
- virtio,
- virtio->pkt_sent,
- virtio->pkt_recv,
- virtio->pkt_drop,
- virtio->tx_stop_times,
- virtio->rx_stop_times,
- virtio->tx_poll_times,
- virtio->rx_ipi_num);
-}
-#endif
-static int handle_ctrl(struct guest_info *core, struct virtio_net_state * virtio) {
+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)
+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;
virtio_state->virtio_cfg.pci_isr = 0x1;
}
-
-#ifdef CONFIG_VNET_PROFILE
- static long min = 1024, max = 0, total=0;
- static int i=0;
- total += recved;
- i ++;
- if(recved > max) max = recved;
- if(recved < min) min = recved;
- if(total > 100000) {
- PrintError("VNIC: TX polling: %ld, min %ld, max %ld, avg: %ld pkts\n", total, min, max, total/i);
- min = 1024;
- max = 0;
- i = 1;
- total = 0;
- }
-#endif
-
-
return 0;
exit_error:
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) {
+ 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;
return 0;
}
-static int virtio_io_write(struct guest_info *core, uint16_t port, void * src, uint_t length, void * private_data)
+static int virtio_io_write(struct guest_info *core,
+ uint16_t port, void * src,
+ uint_t length, void * private_data)
{
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);
switch (queue_idx) {
case 0:
virtio_setup_queue(core, virtio, &virtio->rx_vq, pfn, page_addr);
- disable_cb(&virtio->rx_vq);
+ //disable_cb(&virtio->rx_vq);
break;
case 1:
virtio_setup_queue(core, virtio, &virtio->tx_vq, pfn, page_addr);
- disable_cb(&virtio->tx_vq);
+ //disable_cb(&virtio->tx_vq);
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){
handle_rx_kick(core, virtio);
- PrintError("rx kick\n");
} else if (queue_idx == 1){
- PrintError("tx kick\n");
if (handle_pkt_tx(core, virtio) == -1) {
PrintError("Could not handle NIC Notification\n");
return -1;
return length;
}
-static int virtio_io_read(struct guest_info *core, uint16_t port, void * dst, uint_t length, void * private_data)
+static int virtio_io_read(struct guest_info *core,
+ uint16_t port, void * dst,
+ uint_t length, void * private_data)
{
struct virtio_net_state * virtio = (struct virtio_net_state *)private_data;
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\n", private_data,
+ PrintDebug("Virtio NIC %p: Read for port 0x%x (index =%d), length=%d\n", private_data,
port, port_idx, length);
switch (port_idx) {
v3_pci_lower_irq(virtio->virtio_dev->pci_bus, 0, virtio->pci_dev);
break;
+ case VIRTIO_NET_CONFIG ... VIRTIO_NET_CONFIG + ETH_ALEN:
+ *(uint8_t *)dst = virtio->net_cfg.mac[port_idx-VIRTIO_NET_CONFIG];
+ break;
+
default:
PrintError("Virtio NIC: Read of Unhandled Virtio Read:%d\n", port_idx);
return -1;
int ret_val = -ERR_VIRTIO_OTHER;
int raw = 1;
+#ifndef CONFIG_DEBUG_VIRTIO_NET
+ {
+ PrintDebug("Virtio-NIC: virtio_rx: size: %d\n", size);
+ //v3_hexdump(buf, size, NULL, 0);
+ }
+#endif
+
flags = v3_lock_irqsave(virtio->rx_lock);
virtio->pkt_recv ++;
(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
if(virtio->virtio_dev->vm->cores[0].cpu_id != V3_Get_CPU()){
notify_guest(virtio);
- virtio->rx_ipi_num ++;
}
virtio->buffed_rx = 0;
}
/* RX queue is full, tell backend to stop RX on this device */
virtio->net_ops->stop_rx(virtio->backend_data);
enable_cb(&virtio->rx_vq);
-
- virtio->rx_stop_times ++;
ret_val = -ERR_VIRTIO_RXQ_FULL;
goto exit;
return ret_val;
}
+static int virtio_free(struct virtio_dev_state * virtio) {
+ struct virtio_net_state * backend = NULL;
+ struct virtio_net_state * tmp = NULL;
+
+
+ list_for_each_entry_safe(backend, tmp, &(virtio->dev_list), dev_link) {
+
+ // unregister from PCI
+
+ list_del(&(backend->dev_link));
+ V3_Free(backend);
+ }
+
+ V3_Free(virtio);
+ return 0;
+}
+
static struct v3_device_ops dev_ops = {
- .free = virtio_free,
- .reset = NULL,
- .start = NULL,
- .stop = NULL,
+ .free = (int (*)(void *))virtio_free,
};
/* TODO: Issue here: which vm info it needs? calling VM or the device's own VM? */
-static void virtio_nic_poll(struct v3_vm_info *vm, void *data){
- struct virtio_net_state *virtio = (struct virtio_net_state *)data;
+static void virtio_nic_poll(struct v3_vm_info * vm, void * data){
+ struct virtio_net_state * virtio = (struct virtio_net_state *)data;
handle_pkt_tx(&(vm->cores[0]), virtio);
-
- virtio->tx_poll_times ++;
-
-#ifdef CONFIG_VNET_PROFILE
- static uint64_t last_time = 0;
- uint64_t time;
- rdtscll(time);
- if((time - last_time) > 5000000000){
- last_time = time;
- print_profile_info(virtio);
- }
-#endif
}
-static void virtio_start_tx(void *data){
+static void virtio_start_tx(void * data){
struct virtio_net_state * virtio = (struct virtio_net_state *)data;
+ unsigned long flags;
- /* do we need a lock here? */
+ flags = v3_lock_irqsave(virtio->tx_lock);
virtio->tx_disabled = 0;
- /* notify the device's guest it can start sending pkt */
+ /* notify the device's guest to start sending pkt */
if(virtio->virtio_dev->vm->cores[0].cpu_id != V3_Get_CPU()){
notify_guest(virtio);
}
+ v3_unlock_irqrestore(virtio->tx_lock, flags);
}
-static void virtio_stop_tx(void *data){
+static void virtio_stop_tx(void * data){
struct virtio_net_state * virtio = (struct virtio_net_state *)data;
+ unsigned long flags;
- /* do we need a lock here? */
+ flags = v3_lock_irqsave(virtio->tx_lock);
virtio->tx_disabled = 1;
- /* how do we stop the guest to exit to palacios for sending pkt? */
+ /* stop the guest to exit to palacios for sending pkt? */
if(virtio->virtio_dev->vm->cores[0].cpu_id != V3_Get_CPU()){
disable_cb(&virtio->tx_vq);
}
- virtio->tx_stop_times ++;
+ v3_unlock_irqrestore(virtio->tx_lock, flags);
}
-static int register_dev(struct virtio_dev_state * virtio, struct virtio_net_state * net_state)
+static int register_dev(struct virtio_dev_state * virtio,
+ struct virtio_net_state * net_state)
{
struct pci_device * pci_dev = NULL;
struct v3_pci_bar bars[6];
net_state->pci_dev = pci_dev;
net_state->virtio_dev = virtio;
- uchar_t mac[6] = {0x11,0x11,0x11,0x11,0x11,0x11};
- memcpy(net_state->net_cfg.mac, mac, 6);
-
- memcpy(pci_dev->config_data, net_state->net_cfg.mac, ETH_ALEN);
-
+ memcpy(net_state->net_cfg.mac, virtio->mac, 6);
+
virtio_init_state(net_state);
-#if 0 //temporary hacking LX
- vnic_states[num_vnic ++] = net_state;
- PrintError("VNIC: num of vnic %d\n", num_vnic);
-#endif
+ /* Add backend to list of devices */
+ list_add(&(net_state->dev_link), &(virtio->dev_list));
return 0;
}
net_state->net_ops = ops;
net_state->backend_data = private_data;
+ net_state->virtio_dev = virtio;
+
ops->recv = virtio_rx;
ops->poll = virtio_nic_poll;
ops->start_tx = virtio_start_tx;
ops->stop_tx = virtio_stop_tx;
ops->frontend_data = net_state;
+ memcpy(ops->fnt_mac, virtio->mac, ETH_ALEN);
return 0;
}
+
+static int str2mac(char * macstr, char * mac){
+ char hex[2], *s = macstr;
+ int i = 0;
+
+ while(s){
+ memcpy(hex, s, 2);
+ mac[i++] = (char)atox(hex);
+ if (i == ETH_ALEN) return 0;
+ s=strchr(s, ':');
+ if(s) s++;
+ }
+
+ return -1;
+}
+
+static inline void random_ethaddr(uchar_t * addr)
+{
+ uint64_t val;
+
+ /* using current rdtsc as random number */
+ rdtscll(val);
+ *(uint64_t *)addr = val;
+
+ addr [0] &= 0xfe; /* clear multicast bit */
+ addr [0] |= 0x02; /* set local assignment bit (IEEE802) */
+}
+
+
static int virtio_init(struct v3_vm_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: %s\n", name);
+ char * dev_id = v3_cfg_val(cfg, "ID");
+ char * macstr = v3_cfg_val(cfg, "mac");
if (pci_bus == NULL) {
PrintError("Virtio NIC: VirtIO devices require a PCI Bus");
virtio_state->pci_bus = pci_bus;
virtio_state->vm = vm;
- struct vm_device * dev = v3_allocate_device(name, &dev_ops, virtio_state);
- if (v3_attach_device(vm, dev) == -1) {
- PrintError("Virtio NIC: Could not attach device %s\n", name);
+ if (macstr != NULL && !str2mac(macstr, virtio_state->mac)) {
+ PrintDebug("Virtio NIC: Mac specified %s\n", macstr);
+ }else {
+ PrintDebug("Virtio NIC: MAC not specified\n");
+ random_ethaddr(virtio_state->mac);
+ }
+
+ struct vm_device * dev = v3_add_device(vm, dev_id, &dev_ops, virtio_state);
+
+ if (dev == NULL) {
+ PrintError("Virtio NIC: Could not attach device %s\n", dev_id);
+ V3_Free(virtio_state);
return -1;
}
- if (v3_dev_add_net_frontend(vm, name, connect_fn, (void *)virtio_state) == -1) {
- PrintError("Virtio NIC: Could not register %s as net frontend\n", name);
+ if (v3_dev_add_net_frontend(vm, dev_id, connect_fn, (void *)virtio_state) == -1) {
+ PrintError("Virtio NIC: Could not register %s as net frontend\n", dev_id);
+ v3_remove_device(dev);
return -1;
}
