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>
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;
44 static int vnet_send(uint8_t * buf, uint32_t len, void * private_data, struct vm_device *dest_dev){
45 struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
47 struct v3_vnet_pkt pkt;
49 pkt.src_type = LINK_INTERFACE;
50 pkt.src_id = vnetnic->vnet_dev_id;
51 memcpy(pkt.header, buf, ETHERNET_HEADER_LEN);
54 #ifdef CONFIG_DEBUG_VNET_NIC
56 PrintDebug("Virtio VNET-NIC: send pkt size: %d, pkt src_id: %d\n",
57 len, vnetnic->vnet_dev_id);
58 v3_hexdump(buf, len, NULL, 0);
62 v3_vnet_rx(buf, len, vnetnic->vnet_dev_id, LINK_INTERFACE);
64 //if on the dom0 core, interrupt the domU core to poll pkts
65 //otherwise, call the polling directly
66 int cpu = V3_Get_CPU();
68 v3_interrupt_cpu(vnetnic->vm, cpu, V3_VNET_POLLING_VECTOR);
71 v3_vnet_send_pkt(&pkt, NULL);
76 static int virtio_input(struct v3_vm_info *info, struct v3_vnet_pkt * pkt, void * private_data){
77 struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
79 PrintDebug("Vnet-nic: In input: vnet_nic state %p\n", vnetnic);
81 return vnetnic->net_ops.recv(pkt->data, pkt->size, vnetnic->net_ops.frontend_data);
84 static int register_to_vnet(struct v3_vm_info * vm,
85 struct vnet_nic_state *vnet_nic,
89 PrintDebug("Vnet-nic: register Vnet-nic device %s, state %p to VNET\n", dev_name, vnet_nic);
91 return v3_vnet_add_dev(vm, mac, virtio_input, (void *)vnet_nic);
94 static int vnet_nic_free(struct vm_device * dev) {
98 static struct v3_device_ops dev_ops = {
99 .free = vnet_nic_free,
106 static int str2mac(char *macstr, char mac[6]){
107 char hex[2], *s = macstr;
112 mac[i++] = (char)atox(hex);
113 if (i == 6) return 0;
121 static int vnet_nic_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
122 struct vnet_nic_state * vnetnic = NULL;
123 char * dev_id = v3_cfg_val(cfg, "ID");
124 char * macstr = NULL;
128 v3_cfg_tree_t * frontend_cfg = v3_cfg_subtree(cfg, "frontend");
129 macstr = v3_cfg_val(frontend_cfg, "mac");
131 if (macstr == NULL) {
132 PrintDebug("Vnet-nic: No Mac specified\n");
134 str2mac(macstr, mac);
137 vnetnic = (struct vnet_nic_state *)V3_Malloc(sizeof(struct vnet_nic_state));
138 memset(vnetnic, 0, sizeof(struct vnet_nic_state));
140 struct vm_device * dev = v3_allocate_device(dev_id, &dev_ops, vnetnic);
142 if (v3_attach_device(vm, dev) == -1) {
143 PrintError("Could not attach device %s\n", dev_id);
147 vnetnic->net_ops.send = vnet_send;
148 memcpy(vnetnic->mac, mac, 6);
151 if (v3_dev_connect_net(vm, v3_cfg_val(frontend_cfg, "tag"),
152 &(vnetnic->net_ops), frontend_cfg, vnetnic) == -1) {
153 PrintError("Could not connect %s to frontend %s\n",
154 dev_id, v3_cfg_val(frontend_cfg, "tag"));
158 PrintDebug("Vnet-nic: Connect %s to frontend %s\n",
159 dev_id, v3_cfg_val(frontend_cfg, "tag"));
161 if ((vnet_dev_id = register_to_vnet(vm, vnetnic, dev_id, vnetnic->mac)) == -1) {
162 PrintError("Vnet-nic device %s (mac: %s) fails to registered to VNET\n", dev_id, macstr);
164 vnetnic->vnet_dev_id = vnet_dev_id;
166 PrintDebug("Vnet-nic device %s (mac: %s, %ld) registered to VNET\n", dev_id, macstr, *((ulong_t *)vnetnic->mac));
169 //for temporary hack for vnet bridge test
172 uchar_t zeromac[6] = {0,0,0,0,0,0};
174 if(!strcmp(dev_id, "vnet_nic")){
175 struct v3_vnet_route route;
177 route.dst_id = vnet_dev_id;
178 route.dst_type = LINK_INTERFACE;
180 route.src_type = LINK_EDGE;
181 memcpy(route.dst_mac, zeromac, 6);
182 route.dst_mac_qual = MAC_ANY;
183 memcpy(route.src_mac, zeromac, 6);
184 route.src_mac_qual = MAC_ANY;
185 v3_vnet_add_route(route);
189 route.dst_type = LINK_EDGE;
190 route.src_id = vnet_dev_id;
191 route.src_type = LINK_INTERFACE;
192 memcpy(route.dst_mac, zeromac, 6);
193 route.dst_mac_qual = MAC_ANY;
194 memcpy(route.src_mac, zeromac, 6);
195 route.src_mac_qual = MAC_ANY;
197 v3_vnet_add_route(route);
202 //for temporary hack for Linux bridge (w/o encapuslation) test
205 static int vnet_nic_guestid = -1;
206 static int vnet_nic_dom0 = -1;
207 uchar_t zeromac[6] = {0,0,0,0,0,0};
209 if(!strcmp(dev_id, "vnet_nic")){ //domu
210 vnet_nic_guestid = vnet_dev_id;
212 if (!strcmp(dev_id, "vnet_nic_dom0")){
213 vnet_nic_dom0 = vnet_dev_id;
216 if(vnet_nic_guestid != -1 && vnet_nic_dom0 !=-1){
217 struct v3_vnet_route route;
219 route.src_id = vnet_nic_guestid;
220 route.src_type = LINK_INTERFACE;
221 route.dst_id = vnet_nic_dom0;
222 route.dst_type = LINK_INTERFACE;
223 memcpy(route.dst_mac, zeromac, 6);
224 route.dst_mac_qual = MAC_ANY;
225 memcpy(route.src_mac, zeromac, 6);
226 route.src_mac_qual = MAC_ANY;
227 v3_vnet_add_route(route);
230 route.src_id = vnet_nic_dom0;
231 route.src_type = LINK_INTERFACE;
232 route.dst_id = vnet_nic_guestid;
233 route.dst_type = LINK_INTERFACE;
234 memcpy(route.dst_mac, zeromac, 6);
235 route.dst_mac_qual = MAC_ANY;
236 memcpy(route.src_mac, zeromac, 6);
237 route.src_mac_qual = MAC_ANY;
239 v3_vnet_add_route(route);
247 device_register("VNET_NIC", vnet_nic_init)