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,
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 /* tell 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 /* tell 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) {
127 static struct v3_device_ops dev_ops = {
128 .free = (int (*)(void *))vnet_nic_free,
132 static struct v3_vnet_dev_ops vnet_dev_ops = {
133 .input = virtio_input,
135 .start_tx = start_tx,
140 static int register_to_vnet(struct v3_vm_info * vm,
141 struct vnet_nic_state * vnet_nic,
142 char * dev_name, uchar_t mac[6]) {
144 PrintDebug("Vnet-nic: register Vnet-nic device %s, state %p to VNET\n", dev_name, vnet_nic);
146 return v3_vnet_add_dev(vm, mac, &vnet_dev_ops, (void *)vnet_nic);
150 static int str2mac(char * macstr, char mac[6]){
151 char hex[2], *s = macstr;
156 mac[i++] = (char)atox(hex);
157 if (i == 6) return 0;
165 static int vnet_nic_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
166 struct vnet_nic_state * vnetnic = NULL;
167 char * dev_id = v3_cfg_val(cfg, "ID");
168 char * macstr = NULL;
172 v3_cfg_tree_t * frontend_cfg = v3_cfg_subtree(cfg, "frontend");
173 macstr = v3_cfg_val(frontend_cfg, "mac");
175 if (macstr == NULL) {
176 PrintDebug("Vnet-nic: No Mac specified\n");
178 str2mac(macstr, mac);
181 vnetnic = (struct vnet_nic_state *)V3_Malloc(sizeof(struct vnet_nic_state));
182 memset(vnetnic, 0, sizeof(struct vnet_nic_state));
184 struct vm_device * dev = v3_add_device(vm, dev_id, &dev_ops, vnetnic);
187 PrintError("Could not attach device %s\n", dev_id);
192 vnetnic->net_ops.send = vnet_nic_send;
193 vnetnic->net_ops.start_rx = start_rx;
194 vnetnic->net_ops.stop_rx = stop_rx;
195 memcpy(vnetnic->mac, mac, 6);
198 if (v3_dev_connect_net(vm, v3_cfg_val(frontend_cfg, "tag"),
199 &(vnetnic->net_ops), frontend_cfg, vnetnic) == -1) {
200 PrintError("Could not connect %s to frontend %s\n",
201 dev_id, v3_cfg_val(frontend_cfg, "tag"));
202 v3_remove_device(dev);
206 PrintDebug("Vnet-nic: Connect %s to frontend %s\n",
207 dev_id, v3_cfg_val(frontend_cfg, "tag"));
209 if ((vnet_dev_id = register_to_vnet(vm, vnetnic, dev_id, vnetnic->mac)) == -1) {
210 PrintError("Vnet-nic device %s (mac: %s) fails to registered to VNET\n", dev_id, macstr);
211 v3_remove_device(dev);
215 vnetnic->vnet_dev_id = vnet_dev_id;
217 PrintDebug("Vnet-nic device %s (mac: %s, %ld) registered to VNET\n",
218 dev_id, macstr, *((ulong_t *)vnetnic->mac));
221 //for temporary hack for vnet bridge test
224 uchar_t zeromac[6] = {0,0,0,0,0,0};
226 if(!strcmp(dev_id, "vnet_nic")){
227 struct v3_vnet_route route;
229 route.dst_id = vnet_dev_id;
230 route.dst_type = LINK_INTERFACE;
232 route.src_type = LINK_EDGE;
233 memcpy(route.dst_mac, zeromac, 6);
234 route.dst_mac_qual = MAC_ANY;
235 memcpy(route.src_mac, zeromac, 6);
236 route.src_mac_qual = MAC_ANY;
237 v3_vnet_add_route(route);
241 route.dst_type = LINK_EDGE;
242 route.src_id = vnet_dev_id;
243 route.src_type = LINK_INTERFACE;
244 memcpy(route.dst_mac, zeromac, 6);
245 route.dst_mac_qual = MAC_ANY;
246 memcpy(route.src_mac, zeromac, 6);
247 route.src_mac_qual = MAC_ANY;
249 v3_vnet_add_route(route);
254 //for temporary hack for Linux bridge (w/o encapuslation) test
257 static int vnet_nic_guestid = -1;
258 static int vnet_nic_dom0 = -1;
259 uchar_t zeromac[6] = {0,0,0,0,0,0};
261 if(!strcmp(dev_id, "vnet_nic")){ //domu
262 vnet_nic_guestid = vnet_dev_id;
264 if (!strcmp(dev_id, "vnet_nic_dom0")){
265 vnet_nic_dom0 = vnet_dev_id;
268 if(vnet_nic_guestid != -1 && vnet_nic_dom0 !=-1){
269 struct v3_vnet_route route;
271 route.src_id = vnet_nic_guestid;
272 route.src_type = LINK_INTERFACE;
273 route.dst_id = vnet_nic_dom0;
274 route.dst_type = LINK_INTERFACE;
275 memcpy(route.dst_mac, zeromac, 6);
276 route.dst_mac_qual = MAC_ANY;
277 memcpy(route.src_mac, zeromac, 6);
278 route.src_mac_qual = MAC_ANY;
279 v3_vnet_add_route(route);
282 route.src_id = vnet_nic_dom0;
283 route.src_type = LINK_INTERFACE;
284 route.dst_id = vnet_nic_guestid;
285 route.dst_type = LINK_INTERFACE;
286 memcpy(route.dst_mac, zeromac, 6);
287 route.dst_mac_qual = MAC_ANY;
288 memcpy(route.src_mac, zeromac, 6);
289 route.src_mac_qual = MAC_ANY;
291 v3_vnet_add_route(route);
299 device_register("VNET_NIC", vnet_nic_init)