palacios/src/devices/lnx_virtio_vnet.c

   1 /*
   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.
   5  *
   6  * The V3VEE Project is a joint project between Northwestern University
   7  * and the University of New Mexico.  You can find out more at
   8  * http://www.v3vee.org
   9  *
  10  * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
  11  * Copyright (c) 2008, Lei Xia <lxia@cs.northwestern.edu>
  12  * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
  13  * All rights reserved.
  14  *
  15  * Author: Jack Lange <jarusl@cs.northwestern.edu>
  16  *             Lei Xia <lxia@cs.northwestern.edu>
  17  *
  18  * This is free software.  You are permitted to use,
  19  * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
  20  */
  21
  22 #include <palacios/vmm.h>
  23 #include <palacios/vmm_dev_mgr.h>
  24 #include <palacios/vm_guest_mem.h>
  25 #include <devices/lnx_virtio_pci.h>
  26 #include <vnet/vnet.h>
  27 #include <palacios/vmm_sprintf.h>
  28 #include <devices/pci.h>
  29
  30
  31 #ifndef V3_CONFIG_DEBUG_LINUX_VIRTIO_VNET
  32 #undef PrintDebug
  33 #define PrintDebug(fmt, args...)
  34 #endif
  35
  36
  37 #define QUEUE_SIZE 4096
  38 #define CMD_QUEUE_SIZE 128
  39 #define NUM_QUEUES 3
  40
  41 struct vnet_config {
  42     uint32_t num_devs;
  43     uint32_t num_routes;
  44 } __attribute__((packed));
  45
  46
  47 #define CTRL_QUEUE 0
  48 #define XMIT_QUEUE 1
  49 #define RECV_QUEUE 2
  50
  51 struct virtio_vnet_state {
  52     struct v3_vm_info * vm;
  53     struct vnet_config vnet_cfg;
  54     struct virtio_config virtio_cfg;
  55
  56     struct vm_device * pci_bus;
  57     struct pci_device * pci_dev;
  58
  59     struct virtio_queue queue[NUM_QUEUES];
  60
  61     struct virtio_queue * cur_queue;
  62
  63     int io_range_size;
  64     v3_lock_t lock;
  65
  66     ulong_t pkt_sent, pkt_recv, pkt_drop, tx_exit, rx_exit, total_exit;
  67     int ready;
  68 };
  69
  70 #define VNET_GET_ROUTES 10
  71 #define VNET_ADD_ROUTE 11
  72 #define VNET_DEL_ROUTE 12
  73
  74 #define VNET_GET_LINKS 20
  75 #define VNET_ADD_LINK 21
  76 #define VNET_DEL_LINK 22
  77
  78 struct vnet_ctrl_hdr {
  79     uint8_t cmd_type;
  80     uint32_t num_cmds;
  81 } __attribute__((packed));
  82
  83
  84 struct vnet_bridge_pkt {
  85     uint32_t link_id;
  86     uint32_t pkt_size;
  87     uint8_t pkt[ETHERNET_PACKET_LEN];
  88 }__attribute__((packed));
  89
  90
  91 static int virtio_reset(struct virtio_vnet_state * vnet_state) {
  92
  93     memset(vnet_state->queue, 0, sizeof(struct virtio_queue) * NUM_QUEUES);
  94
  95     vnet_state->cur_queue = &(vnet_state->queue[0]);
  96
  97     vnet_state->virtio_cfg.status = 0;
  98     vnet_state->virtio_cfg.pci_isr = 0;
  99
 100     vnet_state->queue[0].queue_size = CMD_QUEUE_SIZE;
 101     vnet_state->queue[1].queue_size = QUEUE_SIZE;
 102     vnet_state->queue[2].queue_size = QUEUE_SIZE;
 103
 104     memset(&(vnet_state->vnet_cfg), 0, sizeof(struct vnet_config));
 105     v3_lock_init(&(vnet_state->lock));
 106
 107     return 0;
 108 }
 109
 110
 111
 112 static int get_desc_count(struct virtio_queue * q, int index) {
 113     struct vring_desc * tmp_desc = &(q->desc[index]);
 114     int cnt = 1;
 115
 116     while (tmp_desc->flags & VIRTIO_NEXT_FLAG) {
 117         tmp_desc = &(q->desc[tmp_desc->next]);
 118         cnt++;
 119     }
 120
 121     return cnt;
 122 }
 123
 124
 125 static int handle_cmd_kick(struct guest_info * core,
 126                            struct virtio_vnet_state * vnet_state) {
 127     struct virtio_queue * q = &(vnet_state->queue[0]);
 128
 129     PrintDebug("VNET Bridge: Handling command  queue\n");
 130
 131     while (q->cur_avail_idx != q->avail->index) {
 132         struct vring_desc * hdr_desc = NULL;
 133         struct vring_desc * buf_desc = NULL;
 134         struct vring_desc * status_desc = NULL;
 135         uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % QUEUE_SIZE];
 136         uint16_t desc_cnt = get_desc_count(q, desc_idx);
 137         struct vnet_ctrl_hdr * hdr = NULL;
 138         int i;
 139         int xfer_len = 0;
 140         uint8_t * status_ptr = NULL;
 141         uint8_t status = 0;
 142
 143         PrintDebug("VNET Bridge: CMD: Descriptor Count=%d, index=%d, desc_idx=%d\n", desc_cnt, q->cur_avail_idx % QUEUE_SIZE, desc_idx);
 144
 145         if (desc_cnt < 3) {
 146             PrintError("VNET Bridge cmd must include at least 3 descriptors (cnt=%d)\n", desc_cnt);
 147             return -1;
 148         }
 149
 150         hdr_desc = &(q->desc[desc_idx]);
 151
 152         if (v3_gpa_to_hva(core, hdr_desc->addr_gpa, (addr_t *)&hdr) == -1) {
 153             PrintError("Could not translate VirtioVNET header address\n");
 154             return -1;
 155         }
 156
 157         desc_idx = hdr_desc->next;
 158
 159         if (hdr->cmd_type == VNET_ADD_ROUTE) {
 160             for (i = 0; i < hdr->num_cmds; i++) {
 161                 uint8_t tmp_status = 0;
 162                 struct v3_vnet_route * route = NULL;
 163
 164                 buf_desc = &(q->desc[desc_idx]);
 165
 166                 if (v3_gpa_to_hva(core, buf_desc->addr_gpa, (addr_t *)&(route)) == -1) {
 167                     PrintError("Could not translate route address\n");
 168                     return -1;
 169                 }
 170
 171                 tmp_status = v3_vnet_add_route(*route);
 172                 if (tmp_status != 0) {
 173                     PrintError("Error adding VNET ROUTE\n");
 174
 175                     status = tmp_status;
 176                 }
 177
 178                 PrintDebug("VNET Route Added\n");
 179
 180                 xfer_len += buf_desc->length;
 181                 desc_idx = buf_desc->next;
 182             }
 183
 184         }
 185
 186         status_desc = &(q->desc[desc_idx]);
 187
 188         if (v3_gpa_to_hva(core, status_desc->addr_gpa, (addr_t *)&status_ptr) == -1) {
 189             PrintError("VirtioVNET Error could not translate status address\n");
 190             return -1;
 191         }
 192
 193         xfer_len += status_desc->length;
 194         *status_ptr = status;
 195
 196         PrintDebug("Transferred %d bytes (xfer_len)\n", xfer_len);
 197         q->used->ring[q->used->index % QUEUE_SIZE].id = q->avail->ring[q->cur_avail_idx % QUEUE_SIZE];
 198         q->used->ring[q->used->index % QUEUE_SIZE].length = xfer_len; // set to total inbound xfer length
 199
 200         q->used->index++;
 201         q->cur_avail_idx++;
 202     }
 203
 204
 205     if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
 206         PrintDebug("Raising IRQ %d\n",  vnet_state->pci_dev->config_header.intr_line);
 207         v3_pci_raise_irq(vnet_state->pci_bus, 0, vnet_state->pci_dev);
 208         vnet_state->virtio_cfg.pci_isr = 1;
 209     }
 210
 211
 212     return 0;
 213 }
 214
 215
 216 static int vnet_pkt_input_cb(struct v3_vm_info * vm,
 217                              struct v3_vnet_pkt * pkt,
 218                              void * private_data){
 219     struct virtio_vnet_state * vnet_state = (struct virtio_vnet_state *)private_data;
 220     struct virtio_queue * q = &(vnet_state->queue[RECV_QUEUE]);
 221     int ret_val = -1;
 222     unsigned long flags;
 223
 224     flags = v3_lock_irqsave(vnet_state->lock);
 225
 226     if (q->ring_avail_addr == 0) {
 227         PrintError("Queue is not set\n");
 228
 229         goto exit;
 230     }
 231
 232     if (q->cur_avail_idx != q->avail->index) {
 233         uint16_t pkt_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
 234         struct vring_desc * pkt_desc = NULL;
 235         struct vnet_bridge_pkt * virtio_pkt = NULL;
 236
 237         pkt_desc = &(q->desc[pkt_idx]);
 238
 239         if (v3_gpa_to_hva(&(vm->cores[0]), pkt_desc->addr_gpa, (addr_t *)&(virtio_pkt)) == -1) {
 240             PrintError("Could not translate buffer address\n");
 241             goto exit;
 242         }
 243
 244         PrintDebug("VNET Bridge: RX: pkt sent to guest pkt size: %d, dst link: %d\n", pkt->size, pkt->dst_id);
 245
 246         // Fill in dst packet buffer
 247         virtio_pkt->link_id = pkt->dst_id;
 248         virtio_pkt->pkt_size = pkt->size;
 249         memcpy(virtio_pkt->pkt, pkt->data, pkt->size);
 250
 251         q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
 252         q->used->ring[q->used->index % q->queue_size].length = sizeof(struct vnet_bridge_pkt);
 253
 254         q->used->index++;
 255         q->cur_avail_idx++;
 256     } else {
 257         vnet_state->pkt_drop ++;
 258     }
 259
 260     if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
 261         v3_pci_raise_irq(vnet_state->pci_bus, 0, vnet_state->pci_dev);
 262         vnet_state->virtio_cfg.pci_isr = 0x1;
 263         PrintDebug("Raising IRQ %d\n",  vnet_state->pci_dev->config_header.intr_line);
 264     }
 265
 266     ret_val = 0;
 267
 268 exit:
 269
 270     v3_unlock_irqrestore(vnet_state->lock, flags);
 271
 272     return ret_val;
 273 }
 274
 275 static int do_tx_pkts(struct guest_info * core,
 276                            struct virtio_vnet_state * vnet_state)
 277 {
 278     struct virtio_queue * q = &(vnet_state->queue[XMIT_QUEUE]);
 279     int recvd = 0;
 280
 281     if (q->ring_avail_addr == 0) {
 282         return -1;
 283     }
 284
 285     while (q->cur_avail_idx != q->avail->index) {
 286         uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
 287         struct vring_desc * pkt_desc = NULL;
 288         struct vnet_bridge_pkt * virtio_pkt = NULL;
 289
 290         pkt_desc = &(q->desc[desc_idx]);
 291
 292         if (v3_gpa_to_hva(core, pkt_desc->addr_gpa, (addr_t *)&(virtio_pkt)) == -1) {
 293             PrintError("Could not translate buffer address\n");
 294             return -1;
 295         }
 296
 297         //PrintDebug("VNET Bridge: TX: on cpu %d pkt size: %d, dst link: %d\n", cpu, virtio_pkt->pkt_size, virtio_pkt->link_id);
 298
 299         struct v3_vnet_pkt pkt;
 300         pkt.size = virtio_pkt->pkt_size;
 301         pkt.src_type = LINK_EDGE;
 302         pkt.src_id = 0;
 303         memcpy(pkt.header, virtio_pkt->pkt, ETHERNET_HEADER_LEN);
 304         pkt.data = virtio_pkt->pkt;
 305
 306         v3_vnet_send_pkt(&pkt, NULL);
 307
 308         q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
 309         q->used->ring[q->used->index % q->queue_size].length = pkt_desc->length; // What do we set this to????
 310         q->used->index++;
 311
 312         vnet_state->pkt_sent ++;
 313         recvd ++;
 314
 315         q->cur_avail_idx++;
 316     }
 317
 318     if(recvd == 0){
 319         return 0;
 320     }
 321
 322     if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
 323             v3_pci_raise_irq(vnet_state->pci_bus, 0, vnet_state->pci_dev);
 324             vnet_state->virtio_cfg.pci_isr = 0x1;
 325     }
 326
 327     return 0;
 328 }
 329
 330 static void vnet_virtio_poll(struct v3_vm_info * vm, void * private_data){
 331     struct virtio_vnet_state * vnet_state = (struct virtio_vnet_state *)private_data;
 332
 333     if(vm == vnet_state->vm){
 334         do_tx_pkts(&(vm->cores[0]), vnet_state);
 335     }
 336 }
 337
 338 static int handle_rx_queue_kick(struct guest_info *core,
 339                           struct virtio_vnet_state * vnet_state)
 340 {
 341     return 0;
 342 }
 343
 344 static int vnet_virtio_io_write(struct guest_info * core,
 345                                 uint16_t port, void * src,
 346                                 uint_t length, void * private_data) {
 347     struct virtio_vnet_state * vnet_state = (struct virtio_vnet_state *)private_data;
 348     int port_idx = port % vnet_state->io_range_size;
 349
 350     PrintDebug("VNET Bridge: VIRTIO VNET Write for port %d len=%d, value=%x\n",
 351                port, length, *(uint32_t *)src);
 352
 353     vnet_state->total_exit ++;
 354     switch (port_idx) {
 355         case GUEST_FEATURES_PORT:
 356             if (length != 4) {
 357                 PrintError("Illegal write length for guest features\n");
 358                 return -1;
 359             }
 360             vnet_state->virtio_cfg.guest_features = *(uint32_t *)src;
 361
 362             break;
 363         case VRING_PG_NUM_PORT:
 364             if (length == 4) {
 365                 addr_t pfn = *(uint32_t *)src;
 366                 addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
 367
 368                 vnet_state->cur_queue->pfn = pfn;
 369
 370                 vnet_state->cur_queue->ring_desc_addr = page_addr ;
 371                 vnet_state->cur_queue->ring_avail_addr = page_addr + (QUEUE_SIZE * sizeof(struct vring_desc));
 372                 vnet_state->cur_queue->ring_used_addr = ( vnet_state->cur_queue->ring_avail_addr + \
 373                                                  sizeof(struct vring_avail)    + \
 374                                                  (QUEUE_SIZE * sizeof(uint16_t)));
 375
 376                 // round up to next page boundary.
 377                 vnet_state->cur_queue->ring_used_addr = (vnet_state->cur_queue->ring_used_addr + 0xfff) & ~0xfff;
 378
 379                 if (v3_gpa_to_hva(core, vnet_state->cur_queue->ring_desc_addr, (addr_t *)&(vnet_state->cur_queue->desc)) == -1) {
 380                     PrintError("Could not translate ring descriptor address\n");
 381                     return -1;
 382                 }
 383
 384                 if (v3_gpa_to_hva(core, vnet_state->cur_queue->ring_avail_addr, (addr_t *)&(vnet_state->cur_queue->avail)) == -1) {
 385                     PrintError("Could not translate ring available address\n");
 386                     return -1;
 387                 }
 388
 389                 if (v3_gpa_to_hva(core, vnet_state->cur_queue->ring_used_addr, (addr_t *)&(vnet_state->cur_queue->used)) == -1) {
 390                     PrintError("Could not translate ring used address\n");
 391                     return -1;
 392                 }
 393
 394                 PrintDebug("VNET Bridge: RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
 395                            (void *)(vnet_state->cur_queue->ring_desc_addr),
 396                            (void *)(vnet_state->cur_queue->ring_avail_addr),
 397                            (void *)(vnet_state->cur_queue->ring_used_addr));
 398
 399                 PrintDebug("VNET Bridge: RingDesc=%p, Avail=%p, Used=%p\n",
 400                            vnet_state->cur_queue->desc, vnet_state->cur_queue->avail, vnet_state->cur_queue->used);
 401
 402                 if(vnet_state->queue[RECV_QUEUE].avail != NULL){
 403                     vnet_state->ready = 1;
 404                     vnet_state->queue[RECV_QUEUE].used->flags |= VRING_NO_NOTIFY_FLAG;
 405                 }
 406
 407                 //No notify when there is pkt tx from guest
 408                 //palacios will do the polling
 409                 if(vnet_state->queue[XMIT_QUEUE].used != NULL){
 410                     vnet_state->queue[XMIT_QUEUE].used->flags |= VRING_NO_NOTIFY_FLAG;
 411                 }
 412             } else {
 413                 PrintError("Illegal write length for page frame number\n");
 414                 return -1;
 415             }
 416             break;
 417         case VRING_Q_SEL_PORT:
 418             vnet_state->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
 419
 420             if (vnet_state->virtio_cfg.vring_queue_selector > NUM_QUEUES) {
 421                 PrintError("VNET Bridge device has no qeueues. Selected %d\n",
 422                            vnet_state->virtio_cfg.vring_queue_selector);
 423                 return -1;
 424             }
 425
 426             vnet_state->cur_queue = &(vnet_state->queue[vnet_state->virtio_cfg.vring_queue_selector]);
 427
 428             break;
 429         case VRING_Q_NOTIFY_PORT: {
 430             uint16_t queue_idx = *(uint16_t *)src;
 431
 432             PrintDebug("VNET Bridge: Handling Kick\n");
 433
 434             if (queue_idx == 0) {
 435                 if (handle_cmd_kick(core, vnet_state) == -1) {
 436                     PrintError("Could not handle Virtio VNET Control command\n");
 437                     return -1;
 438                 }
 439             } else if (queue_idx == 1) {
 440                 if (do_tx_pkts(core, vnet_state) == -1){
 441                     PrintError("Could not handle Virtio VNET TX\n");
 442                     return -1;
 443                 }
 444                 PrintError("Notify on TX\n");
 445             } else if (queue_idx == 2) {
 446                 if (handle_rx_queue_kick(core, vnet_state) == -1){
 447                     PrintError("Could not handle Virtio RX buffer refills Kick\n");
 448                     return -1;
 449                 }
 450                 vnet_state->rx_exit ++;
 451             } else {
 452                 PrintError("VNET Bridge: Kick on invalid queue (%d)\n", queue_idx);
 453                 return -1;
 454             }
 455
 456             break;
 457         }
 458         case VIRTIO_STATUS_PORT:
 459             vnet_state->virtio_cfg.status = *(uint8_t *)src;
 460
 461             if (vnet_state->virtio_cfg.status == 0) {
 462                 PrintDebug("VNET Bridge: Resetting device\n");
 463                 virtio_reset(vnet_state);
 464             }
 465
 466             break;
 467
 468         case VIRTIO_ISR_PORT:
 469             vnet_state->virtio_cfg.pci_isr = *(uint8_t *)src;
 470             break;
 471         default:
 472             return -1;
 473             break;
 474     }
 475
 476     return length;
 477 }
 478
 479
 480 static int vnet_virtio_io_read(struct guest_info * core,
 481                                uint16_t port, void * dst,
 482                                uint_t length, void * private_data) {
 483
 484     struct virtio_vnet_state * vnet_state = (struct virtio_vnet_state *)private_data;
 485     int port_idx = port % vnet_state->io_range_size;
 486
 487     switch (port_idx) {
 488         case HOST_FEATURES_PORT:
 489             if (length != 4) {
 490                 PrintError("Illegal read length for host features\n");
 491                 return -1;
 492             }
 493
 494             *(uint32_t *)dst = vnet_state->virtio_cfg.host_features;
 495
 496             break;
 497         case VRING_PG_NUM_PORT:
 498             if (length != 4) {
 499                 PrintError("Illegal read length for page frame number\n");
 500                 return -1;
 501             }
 502
 503             *(uint32_t *)dst = vnet_state->cur_queue->pfn;
 504
 505             break;
 506         case VRING_SIZE_PORT:
 507             if (length != 2) {
 508                 PrintError("Illegal read length for vring size\n");
 509                 return -1;
 510             }
 511
 512             *(uint16_t *)dst = vnet_state->cur_queue->queue_size;
 513
 514             break;
 515
 516         case VIRTIO_STATUS_PORT:
 517             if (length != 1) {
 518                 PrintError("Illegal read length for status\n");
 519                 return -1;
 520             }
 521
 522             *(uint8_t *)dst = vnet_state->virtio_cfg.status;
 523             break;
 524
 525         case VIRTIO_ISR_PORT:
 526             *(uint8_t *)dst = vnet_state->virtio_cfg.pci_isr;
 527             vnet_state->virtio_cfg.pci_isr = 0;
 528             v3_pci_lower_irq(vnet_state->pci_bus, 0, vnet_state->pci_dev);
 529             break;
 530
 531         default:
 532             if ( (port_idx >= sizeof(struct virtio_config)) &&
 533                  (port_idx < (sizeof(struct virtio_config) + sizeof(struct vnet_config))) ) {
 534                 int cfg_offset = port_idx - sizeof(struct virtio_config);
 535                 uint8_t * cfg_ptr = (uint8_t *)&(vnet_state->vnet_cfg);
 536
 537                 memcpy(dst, cfg_ptr + cfg_offset, length);
 538
 539             } else {
 540                 PrintError("Read of Unhandled Virtio Read\n");
 541                 return -1;
 542             }
 543
 544             break;
 545     }
 546
 547     return length;
 548 }
 549
 550
 551 static int virtio_free(struct virtio_vnet_state * vnet_state) {
 552
 553     // unregister from PCI
 554
 555     V3_Free(vnet_state);
 556     return 0;
 557 }
 558
 559
 560 static struct v3_device_ops dev_ops = {
 561     .free = (int (*)(void *))virtio_free,
 562 };
 563
 564 static int dev_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
 565     struct vm_device * pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
 566     struct virtio_vnet_state * vnet_state = NULL;
 567     struct pci_device * pci_dev = NULL;
 568     char * name = v3_cfg_val(cfg, "name");
 569
 570     PrintDebug("VNET Bridge: Initializing VNET Bridge Control device: %s\n", name);
 571
 572     if (pci_bus == NULL) {
 573         PrintError("VNET Bridge device require a PCI Bus");
 574         return -1;
 575     }
 576
 577     vnet_state  = (struct virtio_vnet_state *)V3_Malloc(sizeof(struct virtio_vnet_state));
 578     memset(vnet_state, 0, sizeof(struct virtio_vnet_state));
 579
 580     vnet_state->vm = vm;
 581
 582     struct vm_device * dev = v3_add_device(vm, name, &dev_ops, vnet_state);
 583
 584     if (dev == NULL) {
 585         PrintError("Could not attach device %s\n", name);
 586         V3_Free(vnet_state);
 587         return -1;
 588     }
 589
 590
 591     // PCI initialization
 592     {
 593         struct v3_pci_bar bars[6];
 594         int num_ports = sizeof(struct virtio_config) + sizeof(struct vnet_config);
 595         int tmp_ports = num_ports;
 596         int i;
 597
 598         // This gets the number of ports, rounded up to a power of 2
 599         vnet_state->io_range_size = 1; // must be a power of 2
 600
 601         while (tmp_ports > 0) {
 602             tmp_ports >>= 1;
 603             vnet_state->io_range_size <<= 1;
 604         }
 605
 606         // this is to account for any low order bits being set in num_ports
 607         // if there are none, then num_ports was already a power of 2 so we shift right to reset it
 608         if ((num_ports & ((vnet_state->io_range_size >> 1) - 1)) == 0) {
 609             vnet_state->io_range_size >>= 1;
 610         }
 611
 612         for (i = 0; i < 6; i++) {
 613             bars[i].type = PCI_BAR_NONE;
 614         }
 615
 616         bars[0].type = PCI_BAR_IO;
 617         bars[0].default_base_port = -1;
 618         bars[0].num_ports = vnet_state->io_range_size;
 619         bars[0].io_read = vnet_virtio_io_read;
 620         bars[0].io_write = vnet_virtio_io_write;
 621         bars[0].private_data = vnet_state;
 622
 623         pci_dev = v3_pci_register_device(pci_bus, PCI_STD_DEVICE,
 624                                          0, 5 /*PCI_AUTO_DEV_NUM*/, 0,
 625                                          "LNX_VIRTIO_VNET", bars,
 626                                          NULL, NULL, NULL, vnet_state);
 627
 628         if (!pci_dev) {
 629             PrintError("Could not register PCI Device\n");
 630             v3_remove_device(dev);
 631             return -1;
 632         }
 633
 634         pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
 635         pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
 636         pci_dev->config_header.device_id = VIRTIO_VNET_DEV_ID;
 637         pci_dev->config_header.class = PCI_CLASS_MEMORY;
 638         pci_dev->config_header.subclass = PCI_MEM_SUBCLASS_RAM;
 639         pci_dev->config_header.subsystem_id = VIRTIO_VNET_SUBDEVICE_ID;
 640         pci_dev->config_header.intr_pin = 1;
 641         pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
 642
 643
 644         vnet_state->pci_dev = pci_dev;
 645         vnet_state->pci_bus = pci_bus;
 646     }
 647
 648     virtio_reset(vnet_state);
 649
 650     struct v3_vnet_bridge_ops brg_ops;
 651     brg_ops.input = vnet_pkt_input_cb;
 652     brg_ops.poll = vnet_virtio_poll;
 653
 654     V3_Print("Registering Virtio device as vnet bridge\n");
 655
 656     v3_vnet_add_bridge(vm, &brg_ops, CTL_VM_BRIDGE, (void *)vnet_state);
 657
 658     return 0;
 659 }
 660
 661
 662 device_register("LNX_VIRTIO_VNET", dev_init)