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...)
36 struct vnet_nic_state {
37 struct v3_vm_info * vm;
38 struct v3_dev_net_ops net_ops;
43 /* called by frontend, send pkt to VNET */
44 static int vnet_nic_send(uint8_t * buf, uint32_t len,
45 void * private_data) {
46 struct vnet_nic_state * vnetnic = (struct vnet_nic_state *)private_data;
48 struct v3_vnet_pkt pkt;
50 pkt.src_type = LINK_INTERFACE;
51 pkt.src_id = vnetnic->vnet_dev_id;
52 memcpy(pkt.header, buf, ETHERNET_HEADER_LEN);
55 #ifdef CONFIG_DEBUG_VNET_NIC
57 PrintDebug("VNET-NIC: send pkt (size: %d, src_id: %d, src_type: %d)\n",
58 pkt.size, pkt.src_id, pkt.src_type);
59 v3_hexdump(buf, len, NULL, 0);
63 return v3_vnet_send_pkt(&pkt, NULL);;
67 /* send pkt to frontend device */
68 static int virtio_input(struct v3_vm_info * info,
69 struct v3_vnet_pkt * pkt,
71 struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
73 PrintDebug("VNET-NIC: receive pkt (size %d, src_id:%d, src_type: %d, dst_id: %d, dst_type: %d)\n",
74 pkt->size, pkt->src_id, pkt->src_type, pkt->dst_id, pkt->dst_type);
76 return vnetnic->net_ops.recv(pkt->data, pkt->size,
77 vnetnic->net_ops.frontend_data);
80 /* poll data from front-end */
81 static void virtio_poll(struct v3_vm_info * info,
84 struct vnet_nic_state *vnetnic = (struct vnet_nic_state *)private_data;
86 vnetnic->net_ops.poll(info, budget, vnetnic->net_ops.frontend_data);
90 static int vnet_nic_free(struct vnet_nic_state * vnetnic) {
92 v3_vnet_del_dev(vnetnic->vnet_dev_id);
98 static struct v3_device_ops dev_ops = {
99 .free = (int (*)(void *))vnet_nic_free,
103 static struct v3_vnet_dev_ops vnet_dev_ops = {
104 .input = virtio_input,
109 static int vnet_nic_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
110 struct vnet_nic_state * vnetnic = NULL;
111 char * dev_id = v3_cfg_val(cfg, "ID");
114 v3_cfg_tree_t * frontend_cfg = v3_cfg_subtree(cfg, "frontend");
116 vnetnic = (struct vnet_nic_state *)V3_Malloc(sizeof(struct vnet_nic_state));
117 memset(vnetnic, 0, sizeof(struct vnet_nic_state));
119 struct vm_device * dev = v3_add_device(vm, dev_id, &dev_ops, vnetnic);
121 PrintError("Could not attach device %s\n", dev_id);
126 vnetnic->net_ops.send = vnet_nic_send;
129 if (v3_dev_connect_net(vm, v3_cfg_val(frontend_cfg, "tag"),
130 &(vnetnic->net_ops), frontend_cfg, vnetnic) == -1) {
131 PrintError("Could not connect %s to frontend %s\n",
132 dev_id, v3_cfg_val(frontend_cfg, "tag"));
133 v3_remove_device(dev);
137 PrintDebug("Vnet-nic: Connect %s to frontend %s\n",
138 dev_id, v3_cfg_val(frontend_cfg, "tag"));
140 if ((vnet_dev_id = v3_vnet_add_dev(vm, vnetnic->net_ops.fnt_mac, &vnet_dev_ops, (void *)vnetnic)) == -1) {
141 PrintError("Vnet-nic device %s fails to registered to VNET\n", dev_id);
143 v3_remove_device(dev);
146 vnetnic->vnet_dev_id = vnet_dev_id;
151 device_register("VNET_NIC", vnet_nic_init)