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) 2010, Lei Xia <lxia@northwestern.edu>
11 * Copyright (c) 2010, 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>
28 #include <palacios/vmm_sprintf.h>
29 #include <palacios/vmm_ethernet.h>
31 #ifndef CONFIG_DEBUG_VNET_NIC
33 #define PrintDebug(fmt, args...)
37 struct vnet_nic_state {
38 struct v3_vm_info * vm;
39 struct v3_dev_net_ops net_ops;
43 /* called by frontend device,
44 * tell the VNET can start sending pkt to it */
45 static void start_rx(void * private_data){
46 //struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
48 //v3_vnet_enable_device(vnetnic->vnet_dev_id);
51 /* called by frontend device,
52 * tell the VNET stop sending pkt to it */
53 static void stop_rx(void * private_data){
54 //struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
56 //v3_vnet_disable_device(vnetnic->vnet_dev_id);
59 /* called by frontend, send pkt to VNET */
60 static int vnet_nic_send(uint8_t * buf, uint32_t len,
61 void * private_data) {
62 struct vnet_nic_state * vnetnic = (struct vnet_nic_state *)private_data;
64 struct v3_vnet_pkt pkt;
66 pkt.src_type = LINK_INTERFACE;
67 pkt.src_id = vnetnic->vnet_dev_id;
68 memcpy(pkt.header, buf, ETHERNET_HEADER_LEN);
71 #ifdef CONFIG_DEBUG_VNET_NIC
73 PrintDebug("VNET-NIC: send pkt (size: %d, src_id: %d, src_type: %d)\n",
74 pkt.size, pkt.src_id, pkt.src_type);
75 v3_hexdump(buf, len, NULL, 0);
79 return v3_vnet_send_pkt(&pkt, NULL);;
83 /* send pkt to frontend device */
84 static int virtio_input(struct v3_vm_info * info,
85 struct v3_vnet_pkt * pkt,
87 struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
89 PrintDebug("VNET-NIC: receive pkt (size %d, src_id:%d, src_type: %d, dst_id: %d, dst_type: %d)\n",
90 pkt->size, pkt->src_id, pkt->src_type, pkt->dst_id, pkt->dst_type);
92 return vnetnic->net_ops.recv(pkt->data, pkt->size,
93 vnetnic->net_ops.frontend_data);
96 /* tell frontend device to poll data from guest */
97 static void virtio_poll(struct v3_vm_info * info,
99 struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
101 vnetnic->net_ops.poll(info, vnetnic->net_ops.frontend_data);
105 /* notify the frontend to start sending pkt to VNET*/
106 static void start_tx(void * private_data){
107 struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
109 vnetnic->net_ops.start_tx(vnetnic->net_ops.frontend_data);
112 /* notify the frontend device to stop sending pkt to VNET*/
113 static void stop_tx(void * private_data){
114 struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
116 vnetnic->net_ops.stop_tx(vnetnic->net_ops.frontend_data);
120 static int vnet_nic_free(struct vnet_nic_state * vnetnic) {
122 v3_vnet_del_dev(vnetnic->vnet_dev_id);
128 static struct v3_device_ops dev_ops = {
129 .free = (int (*)(void *))vnet_nic_free,
133 static struct v3_vnet_dev_ops vnet_dev_ops = {
134 .input = virtio_input,
136 .start_tx = start_tx,
141 static int vnet_nic_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
142 struct vnet_nic_state * vnetnic = NULL;
143 char * dev_id = v3_cfg_val(cfg, "ID");
146 v3_cfg_tree_t * frontend_cfg = v3_cfg_subtree(cfg, "frontend");
148 vnetnic = (struct vnet_nic_state *)V3_Malloc(sizeof(struct vnet_nic_state));
149 memset(vnetnic, 0, sizeof(struct vnet_nic_state));
151 struct vm_device * dev = v3_add_device(vm, dev_id, &dev_ops, vnetnic);
153 PrintError("Could not attach device %s\n", dev_id);
158 vnetnic->net_ops.send = vnet_nic_send;
159 vnetnic->net_ops.start_rx = start_rx;
160 vnetnic->net_ops.stop_rx = stop_rx;
163 if (v3_dev_connect_net(vm, v3_cfg_val(frontend_cfg, "tag"),
164 &(vnetnic->net_ops), frontend_cfg, vnetnic) == -1) {
165 PrintError("Could not connect %s to frontend %s\n",
166 dev_id, v3_cfg_val(frontend_cfg, "tag"));
167 v3_remove_device(dev);
171 PrintDebug("Vnet-nic: Connect %s to frontend %s\n",
172 dev_id, v3_cfg_val(frontend_cfg, "tag"));
174 if ((vnet_dev_id = v3_vnet_add_dev(vm, vnetnic->net_ops.fnt_mac, &vnet_dev_ops, (void *)vnetnic)) == -1) {
175 PrintError("Vnet-nic device %s fails to registered to VNET\n", dev_id);
176 v3_remove_device(dev);
179 vnetnic->vnet_dev_id = vnet_dev_id;
181 PrintDebug("Vnet-nic device %s registered to VNET\n", dev_id);
186 device_register("VNET_NIC", vnet_nic_init)