2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2008, Lei Xia <lxia@northwestern.edu>
11 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Lei Xia <lxia@northwestern.edu>
17 * This is free software. You are permitted to use,
18 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
20 //backend device for Virtio NIC
22 #include <palacios/vmm_vnet.h>
23 #include <palacios/vmm.h>
24 #include <palacios/vmm_dev_mgr.h>
25 #include <devices/lnx_virtio_pci.h>
26 #include <palacios/vm_guest_mem.h>
27 #include <devices/pci.h>
30 #ifndef CONFIG_DEBUG_VNET_NIC
32 #define PrintDebug(fmt, args...)
36 struct vnet_nic_state {
38 struct guest_info * core;
41 int (*frontend_input)(struct v3_vm_info *info,
47 //used when virtio_nic get a packet from guest and send it to the backend
48 static int vnet_send(uint8_t * buf, uint32_t len, void * private_data, struct vm_device *dest_dev){
49 PrintDebug("Virito NIC: In vnet_send: guest net state %p\n", private_data);
50 struct v3_vnet_pkt * pkt = NULL;
54 v3_vnet_send_pkt(pkt);
59 // We need to make this dynamically allocated
60 static struct v3_dev_net_ops net_ops = {
64 static int virtio_input(struct v3_vm_info *info, struct v3_vnet_pkt * pkt, void * private_data){
65 // struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
67 // PrintDebug("Vnet-nic: In input: vnet_nic state %p\n", vnetnic);
69 return net_ops.recv(pkt->data, pkt->size, net_ops.frontend_data);
73 static int sendto_buf(struct vnet_nic_dev_state *vnetnic_dev, uchar_t * buf, uint_t size) {
76 pkt = (struct eth_pkt *)V3_Malloc(sizeof(struct eth_pkt));
78 PrintError("Vnet NIC: Memory allocate fails\n");
83 memcpy(pkt->data, buf, size);
84 v3_enqueue(vnetnic_dev->inpkt_q, (addr_t)pkt);
86 PrintDebug("Vnet NIC: sendto_buf: packet: (size:%d)\n", (int)pkt->size);
92 *called in svm/vmx handler
93 *iteative handled the unsent packet in incoming packet queues for
94 *all virtio nic devices in this guest
96 int v3_virtionic_pktprocess(struct guest_info * info)
98 struct eth_pkt *pkt = NULL;
99 struct virtio_net_state *net_state;
102 //PrintDebug("Virtio NIC: processing guest %p\n", info);
103 for (i = 0; i < net_idx; i++) {
105 net_state = temp_net_states[i];
106 if(net_state->dev->vm != info)
109 pkt = (struct eth_pkt *)v3_dequeue(net_state->inpkt_q);
113 if (send_pkt_to_guest(net_state, pkt->data, pkt->size, 1, NULL)) {
114 PrintDebug("Virtio NIC: %p In pkt_handle: send one packet! pt length %d\n",
115 net_state, (int)pkt->size);
117 PrintDebug("Virtio NIC: %p In pkt_handle: Fail to send one packet, pt length %d, discard it!\n",
118 net_state, (int)pkt->size);
130 *called in svm/vmx handler
131 *iteative handled the unsent packet in incoming packet queues for
132 *all virtio nic devices in this guest
134 int v3_vnetnic_pktprocess(struct guest_info * info)
142 //register a virtio device to the vnet as backend
143 int register_to_vnet(struct v3_vm_info * vm,
144 struct vnet_nic_state *vnet_nic,
148 PrintDebug("Vnet-nic: register Vnet-nic device %s, state %p to VNET\n", dev_name, vnet_nic);
150 v3_vnet_add_dev(vm, dev_name, mac, virtio_input, (void *)vnet_nic);
157 static int vnet_nic_free(struct vm_device * dev) {
161 static struct v3_device_ops dev_ops = {
162 .free = vnet_nic_free,
168 static int vnet_nic_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
169 struct vnet_nic_state * vnetnic = NULL;
170 char * name = v3_cfg_val(cfg, "name");
172 v3_cfg_tree_t * frontend_cfg = v3_cfg_subtree(cfg, "frontend");
174 vnetnic = (struct vnet_nic_state *)V3_Malloc(sizeof(struct vnet_nic_state));
175 memset(vnetnic, 0, sizeof(struct vnet_nic_state));
177 struct vm_device * dev = v3_allocate_device(name, &dev_ops, vnetnic);
179 if (v3_attach_device(vm, dev) == -1) {
180 PrintError("Could not attach device %s\n", name);
184 if (v3_dev_connect_net(vm, v3_cfg_val(frontend_cfg, "tag"),
185 &net_ops, frontend_cfg, vnetnic) == -1) {
186 PrintError("Could not connect %s to frontend %s\n",
187 name, v3_cfg_val(frontend_cfg, "tag"));
191 if (register_to_vnet(vm, vnetnic, name, vnetnic->mac) == -1) {
195 PrintDebug("Vnet-nic device %s initialized\n", name);
200 device_register("VNET_NIC", vnet_nic_init)