* Copyright (c) 2010, Lei Xia <lxia@northwestern.edu>
* Copyright (c) 2009, Yuan Tang <ytang@northwestern.edu>
* Copyright (c) 2009, The V3VEE Project <http://www.v3vee.org>
- * All rights reserved.
+ * All rights reserved
*
* Author: Lei Xia <lxia@northwestern.edu>
* Yuan Tang <ytang@northwestern.edu>
#include <vnet/vnet_host.h>
#include <vnet/vnet_vmm.h>
+#include <palacios/vmm_queue.h>
+
#ifndef V3_CONFIG_DEBUG_VNET
#undef Vnet_Debug
#define Vnet_Debug(fmt, args...)
uint8_t mac_addr[ETH_ALEN];
struct v3_vm_info * vm;
struct v3_vnet_dev_ops dev_ops;
+
+ int poll;
+
+#define VNET_MAX_QUOTE 64
+ int quote;
+
void * private_data;
- struct list_head node;
+ struct list_head node;\r
} __attribute__((packed));
uint32_t size_alloc;
};
-#define VNET_QUEUE_SIZE 1024
-struct vnet_queue {
- struct queue_entry buf[VNET_QUEUE_SIZE];
- int head, tail;
- int count;
- vnet_lock_t lock;
-};
static struct {
struct list_head routes;
vnet_lock_t lock;
struct vnet_stat stats;
- struct vnet_thread * pkt_flush_thread;
+ /* device queue that are waiting to be polled */
+ struct v3_queue * poll_devs;
- struct vnet_queue pkt_q;
+ struct vnet_thread * pkt_flush_thread;
struct hashtable * route_cache;
} vnet_state;
}
-int vnet_tx_one_pkt(struct v3_vnet_pkt * pkt, void * private_data) {
+int v3_vnet_send_pkt(struct v3_vnet_pkt * pkt, void * private_data) {
struct route_list * matched_routes = NULL;
unsigned long flags;
int i;
int cpu = V3_Get_CPU();
Vnet_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);
+ cpu, pkt->size, pkt->src_id,
+ pkt->src_type, pkt->dst_id, pkt->dst_type);
if(net_debug >= 4){
- v3_hexdump(pkt->data, pkt->size, NULL, 0);
+ v3_hexdump(pkt->data, pkt->size, NULL, 0);
}
flags = vnet_lock_irqsave(vnet_state.lock);
}
-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);
- uint16_t num_pages;
-
- flags = vnet_lock_irqsave(q->lock);
-
- if (q->count >= VNET_QUEUE_SIZE){
- Vnet_Print(1, "VNET Queue overflow!\n");
- vnet_unlock_irqrestore(q->lock, flags);
- return -1;
- }
-
- q->count ++;
- entry = &(q->buf[q->tail++]);
- q->tail %= VNET_QUEUE_SIZE;
-
- vnet_unlock_irqrestore(q->lock, flags);
-
- /* this is ugly, but should happen very unlikely */
- while(entry->use);
-
- if(entry->size_alloc < pkt->size){
- if(entry->data != NULL){
- Vnet_FreePages(Vnet_PAddr(entry->data), (entry->size_alloc / PAGE_SIZE));
- entry->data = NULL;
- }
-
- num_pages = 1 + (pkt->size / PAGE_SIZE);
- entry->data = Vnet_VAddr(Vnet_AllocPages(num_pages));
- if(entry->data == NULL){
- return -1;
- }
- entry->size_alloc = PAGE_SIZE * num_pages;
- }
-
- 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);
- Vnet_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,
+ struct v3_vnet_dev_ops *ops, int quote, int poll_state,
void * priv_data){
struct vnet_dev * new_dev = NULL;
unsigned long flags;
new_dev->private_data = priv_data;
new_dev->vm = vm;
new_dev->dev_id = 0;
+ new_dev->quote = quote<VNET_MAX_QUOTE?quote:VNET_MAX_QUOTE;
+ new_dev->poll = poll_state;
flags = vnet_lock_irqsave(vnet_state.lock);
}
+/* can be instanieoued to multiple threads
+ * that runs on multiple cores
+ * or it could be running on a dedicated side core
+ */
static int vnet_tx_flush(void *args){
- unsigned long flags;
- struct queue_entry * entry;
- struct vnet_queue * q = &(vnet_state.pkt_q);
+ struct vnet_dev * dev = NULL;
+ int ret;
- Vnet_Print(0, "VNET/P Handing Pkt Thread Starting ....\n");
+ Vnet_Print(0, "VNET/P Polling Thread Starting ....\n");
/* we need thread sleep/wakeup in Palacios */
while(!vnet_thread_should_stop()){
- flags = vnet_lock_irqsave(q->lock);
-
- if (q->count <= 0){
- vnet_unlock_irqrestore(q->lock, flags);
- Vnet_Yield();
- }else {
- q->count --;
- entry = &(q->buf[q->head++]);
- q->head %= VNET_QUEUE_SIZE;
-
- vnet_unlock_irqrestore(q->lock, flags);
+ dev = (struct vnet_dev *)v3_dequeue(vnet_state.poll_devs);
+ if(dev != NULL){
+ if(dev->poll && dev->dev_ops.poll != NULL){
+ ret = dev->dev_ops.poll(dev->vm, dev->quote, dev->private_data);
- /* this is ugly, but should happen very unlikely */
- while(!entry->use);
- vnet_tx_one_pkt(&(entry->pkt), NULL);
-
- /* asynchronizely release allocated memory for buffer entry here */
- entry->use = 0;
+ if (ret < 0){
+ PrintDebug("VNET/P: poll from device %p error!\n", dev);
+ }
- Vnet_Print(2, "vnet_tx_flush: pkt (size %d)\n", entry->pkt.size);
+ v3_enqueue(vnet_state.poll_devs, (addr_t)dev);
+ }
+ }else { /* no device needs to be polled */
+ /* sleep here? */
+ Vnet_Yield();
}
}
return 0;
}
+
int v3_init_vnet() {
memset(&vnet_state, 0, sizeof(vnet_state));
vnet_state.num_routes = 0;
if (vnet_lock_init(&(vnet_state.lock)) == -1){
- PrintError("VNET/P Core: Fails to initiate lock\n");
+ PrintError("VNET/P: Fails to initiate lock\n");
}
vnet_state.route_cache = vnet_create_htable(0, &hash_fn, &hash_eq);
if (vnet_state.route_cache == NULL) {
- PrintError("VNET/P Core: Fails to initiate route cache\n");
+ PrintError("VNET/P: Fails to initiate route cache\n");
return -1;
}
- vnet_lock_init(&(vnet_state.pkt_q.lock));
+ vnet_state.poll_devs = v3_create_queue();
- vnet_state.pkt_flush_thread = vnet_start_thread(vnet_tx_flush, NULL, "VNET_Pkts");
+ vnet_state.pkt_flush_thread = vnet_start_thread(vnet_tx_flush, NULL, "vnetd");
- Vnet_Debug("VNET/P Core is initiated\n");
+ Vnet_Debug("VNET/P is initiated\n");
return 0;
}
