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>
30 #ifndef CONFIG_DEBUG_VNET_NIC
32 #define PrintDebug(fmt, args...)
36 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, void * private_data, struct vm_device *dest_dev){
61 struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
63 struct v3_vnet_pkt pkt;
65 pkt.src_type = LINK_INTERFACE;
66 pkt.src_id = vnetnic->vnet_dev_id;
67 memcpy(pkt.header, buf, ETHERNET_HEADER_LEN);
70 #ifdef CONFIG_DEBUG_VNET_NIC
72 PrintDebug("Virtio VNET-NIC: send pkt size: %d, pkt src_id: %d\n",
73 len, vnetnic->vnet_dev_id);
74 v3_hexdump(buf, len, NULL, 0);
78 return v3_vnet_send_pkt(&pkt, NULL);;
83 * send pkt to frontend device */
84 static int virtio_input(struct v3_vm_info *info, struct v3_vnet_pkt * pkt, void * private_data){
85 struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
87 return vnetnic->net_ops.recv(pkt->data,
89 vnetnic->net_ops.frontend_data);
93 * tell frontend device to poll data from guest */
94 static void virtio_poll(struct v3_vm_info *info, void * private_data){
95 struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
97 vnetnic->net_ops.poll(info, vnetnic->net_ops.frontend_data);
100 /* called by VNET, from different processor */
101 static void virtio_poll_xcall(void *data){
102 struct v3_vnet_dev_xcall_args *args = (struct v3_vnet_dev_xcall_args *)data;
103 struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)args->private_data;
105 if(args->vm == vnetnic->vm) /*only do polling on the same Virtual Machine */
106 virtio_poll(args->vm, args->private_data);
110 * tell the frontend to start sending pkt to VNET*/
111 static void start_tx(void *private_data){
112 struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
114 vnetnic->net_ops.start_tx(vnetnic->net_ops.frontend_data);
118 * tell the frontend device to stop sending pkt to VNET*/
119 static void stop_tx(void *private_data){
120 struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
122 vnetnic->net_ops.stop_tx(vnetnic->net_ops.frontend_data);
126 static int vnet_nic_free(struct vm_device * dev) {
130 static struct v3_device_ops dev_ops = {
131 .free = vnet_nic_free,
137 static struct v3_vnet_dev_ops vnet_dev_ops = {
138 .input = virtio_input,
140 .poll_xcall = virtio_poll_xcall,
141 .start_tx = start_tx,
146 static int register_to_vnet(struct v3_vm_info * vm,
147 struct vnet_nic_state *vnet_nic,
151 PrintDebug("Vnet-nic: register Vnet-nic device %s, state %p to VNET\n", dev_name, vnet_nic);
153 return v3_vnet_add_dev(vm, mac, &vnet_dev_ops, (void *)vnet_nic);
157 static int str2mac(char *macstr, char mac[6]){
158 char hex[2], *s = macstr;
163 mac[i++] = (char)atox(hex);
164 if (i == 6) return 0;
172 static int vnet_nic_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
173 struct vnet_nic_state * vnetnic = NULL;
174 char * name = v3_cfg_val(cfg, "name");
175 char * macstr = NULL;
179 v3_cfg_tree_t * frontend_cfg = v3_cfg_subtree(cfg, "frontend");
180 macstr = v3_cfg_val(frontend_cfg, "mac");
182 if (macstr == NULL) {
183 PrintDebug("Vnet-nic: No Mac specified\n");
185 str2mac(macstr, mac);
188 vnetnic = (struct vnet_nic_state *)V3_Malloc(sizeof(struct vnet_nic_state));
189 memset(vnetnic, 0, sizeof(struct vnet_nic_state));
191 struct vm_device * dev = v3_allocate_device(name, &dev_ops, vnetnic);
193 if (v3_attach_device(vm, dev) == -1) {
194 PrintError("Could not attach device %s\n", name);
198 vnetnic->net_ops.send = vnet_nic_send;
199 vnetnic->net_ops.start_rx = start_rx;
200 vnetnic->net_ops.stop_rx = stop_rx;
201 memcpy(vnetnic->mac, mac, 6);
204 if (v3_dev_connect_net(vm, v3_cfg_val(frontend_cfg, "tag"),
205 &(vnetnic->net_ops), frontend_cfg, vnetnic) == -1) {
206 PrintError("Could not connect %s to frontend %s\n",
207 name, v3_cfg_val(frontend_cfg, "tag"));
211 PrintDebug("Vnet-nic: Connect %s to frontend %s\n",
212 name, v3_cfg_val(frontend_cfg, "tag"));
214 if ((vnet_dev_id = register_to_vnet(vm, vnetnic, name, vnetnic->mac)) == -1) {
215 PrintError("Vnet-nic device %s (mac: %s) fails to registered to VNET\n", name, macstr);
217 vnetnic->vnet_dev_id = vnet_dev_id;
219 PrintDebug("Vnet-nic device %s (mac: %s, %ld) registered to VNET\n",
220 name, macstr, *((ulong_t *)vnetnic->mac));
223 //for temporary hack for vnet bridge test
226 uchar_t zeromac[6] = {0,0,0,0,0,0};
228 if(!strcmp(name, "vnet_nic")){
229 struct v3_vnet_route route;
231 route.dst_id = vnet_dev_id;
232 route.dst_type = LINK_INTERFACE;
234 route.src_type = LINK_EDGE;
235 memcpy(route.dst_mac, zeromac, 6);
236 route.dst_mac_qual = MAC_ANY;
237 memcpy(route.src_mac, zeromac, 6);
238 route.src_mac_qual = MAC_ANY;
239 v3_vnet_add_route(route);
243 route.dst_type = LINK_EDGE;
244 route.src_id = vnet_dev_id;
245 route.src_type = LINK_INTERFACE;
246 memcpy(route.dst_mac, zeromac, 6);
247 route.dst_mac_qual = MAC_ANY;
248 memcpy(route.src_mac, zeromac, 6);
249 route.src_mac_qual = MAC_ANY;
251 v3_vnet_add_route(route);
256 //for temporary hack for Linux bridge (w/o encapuslation) test
259 static int vnet_nic_guestid = -1;
260 static int vnet_nic_dom0 = -1;
261 uchar_t zeromac[6] = {0,0,0,0,0,0};
263 if(!strcmp(name, "vnet_nic")){ //domu
264 vnet_nic_guestid = vnet_dev_id;
266 if (!strcmp(name, "vnet_nic_dom0")){
267 vnet_nic_dom0 = vnet_dev_id;
270 if(vnet_nic_guestid != -1 && vnet_nic_dom0 !=-1){
271 struct v3_vnet_route route;
273 route.src_id = vnet_nic_guestid;
274 route.src_type = LINK_INTERFACE;
275 route.dst_id = vnet_nic_dom0;
276 route.dst_type = LINK_INTERFACE;
277 memcpy(route.dst_mac, zeromac, 6);
278 route.dst_mac_qual = MAC_ANY;
279 memcpy(route.src_mac, zeromac, 6);
280 route.src_mac_qual = MAC_ANY;
281 v3_vnet_add_route(route);
284 route.src_id = vnet_nic_dom0;
285 route.src_type = LINK_INTERFACE;
286 route.dst_id = vnet_nic_guestid;
287 route.dst_type = LINK_INTERFACE;
288 memcpy(route.dst_mac, zeromac, 6);
289 route.dst_mac_qual = MAC_ANY;
290 memcpy(route.src_mac, zeromac, 6);
291 route.src_mac_qual = MAC_ANY;
293 v3_vnet_add_route(route);
301 device_register("VNET_NIC", vnet_nic_init)