palacios/src/devices/lnx_virtio_symmod.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, The V3VEE Project <http://www.v3vee.org>
  12  * All rights reserved.
  13  *
  14  * Author: Jack Lange <jarusl@cs.northwestern.edu>
  15  *
  16  * This is free software.  You are permitted to use,
  17  * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
  18  */
  19
  20 #include <palacios/vmm.h>
  21 #include <palacios/vmm_dev_mgr.h>
  22 #include <palacios/vm_guest_mem.h>
  23 #include <devices/lnx_virtio_pci.h>
  24 #include <palacios/vmm_symmod.h>
  25 #include <palacios/vmm_hashtable.h>
  26
  27 #include <devices/pci.h>
  28
  29
  30 #define QUEUE_SIZE 128
  31 #define NUM_QUEUES 2
  32
  33 struct sym_config {
  34     uint32_t avail_mods;
  35     uint32_t loaded_mods;
  36 } __attribute__((packed));
  37
  38
  39
  40 struct virtio_sym_state {
  41     struct sym_config sym_cfg;
  42     struct virtio_config virtio_cfg;
  43
  44
  45     struct vm_device * pci_bus;
  46     struct pci_device * pci_dev;
  47     struct v3_vm_info * vm;
  48     struct v3_symmod_state * symmod_state;
  49
  50
  51 #define NOTIFY_QUEUE 0
  52 #define LOADER_QUEUE 1
  53     struct virtio_queue queue[NUM_QUEUES];
  54
  55     struct virtio_queue * cur_queue;
  56
  57     int notifier_active;
  58
  59     int io_range_size;
  60 };
  61
  62
  63
  64 struct symmod_cmd {
  65 #define CMD_INV  0
  66 #define CMD_LOAD 1
  67 #define CMD_LIST 2
  68     uint32_t cmd;
  69     uint32_t num_cmds;
  70 } __attribute__((packed));
  71
  72
  73 // structure of the symmod notifier ring structures
  74 struct symmod_hdr {
  75     uint32_t num_bytes;
  76     char name[32];
  77     union {
  78         uint32_t flags;
  79         struct {
  80 #define V3_SYMMOD_INV (0x00)
  81 #define V3_SYMMOD_LNX (0x01)
  82 #define V3_SYMMOD_MOD (0x02)
  83 #define V3_SYMMOD_SEC (0x03)
  84             uint8_t type;
  85
  86 #define V3_SYMMOD_ARCH_INV     (0x00)
  87 #define V3_SYMMOD_ARCH_i386    (0x01)
  88 #define V3_SYMMOD_ARCH_x86_64  (0x02)
  89             uint8_t arch;
  90
  91 #define V3_SYMMOD_ACT_INV       (0x00)
  92 #define V3_SYMMOD_ACT_ADVERTISE (0x01)
  93 #define V3_SYMMOD_ACT_LOAD      (0x02)
  94             uint8_t action;
  95
  96             uint8_t rsvd;
  97         } __attribute__((packed));
  98     } __attribute__((packed));
  99 } __attribute__((packed));
 100
 101
 102 static int virtio_reset(struct virtio_sym_state * virtio) {
 103
 104     memset(virtio->queue, 0, sizeof(struct virtio_queue) * 2);
 105
 106     virtio->cur_queue = &(virtio->queue[0]);
 107
 108     virtio->virtio_cfg.status = 0;
 109     virtio->virtio_cfg.pci_isr = 0;
 110
 111     virtio->queue[0].queue_size = QUEUE_SIZE;
 112     virtio->queue[1].queue_size = QUEUE_SIZE;
 113
 114
 115     virtio->sym_cfg.avail_mods = virtio->symmod_state->num_avail_capsules;
 116     virtio->sym_cfg.loaded_mods = virtio->symmod_state->num_loaded_capsules;
 117
 118     return 0;
 119 }
 120
 121
 122
 123 static int get_desc_count(struct virtio_queue * q, int index) {
 124     struct vring_desc * tmp_desc = &(q->desc[index]);
 125     int cnt = 1;
 126
 127     while (tmp_desc->flags & VIRTIO_NEXT_FLAG) {
 128         tmp_desc = &(q->desc[tmp_desc->next]);
 129         cnt++;
 130     }
 131
 132     return cnt;
 133 }
 134
 135
 136
 137
 138 static int handle_xfer_kick(struct guest_info * core, struct virtio_sym_state * sym_state) {
 139     struct virtio_queue * q = sym_state->cur_queue;
 140
 141     PrintDebug("SYMMOD: VIRTIO SYMMOD Kick on loader queue\n");
 142
 143     while (q->cur_avail_idx != q->avail->index) {
 144         struct vring_desc * cmd_desc = NULL;
 145         struct symmod_cmd * cmd = NULL;
 146         uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % QUEUE_SIZE];
 147         uint16_t desc_cnt = get_desc_count(q, desc_idx);
 148         struct vring_desc * status_desc = NULL;
 149         uint8_t status = 0;
 150         uint8_t * status_ptr = NULL;
 151         int i;
 152         uint32_t xfer_len = 0;
 153
 154         cmd_desc = &(q->desc[desc_idx]);
 155
 156         if (v3_gpa_to_hva(core, cmd_desc->addr_gpa, (addr_t *)&cmd) == -1) {
 157             PrintError("Could not translate SYMMOD header address\n");
 158             return -1;
 159         }
 160
 161         desc_idx = cmd_desc->next;
 162
 163         if (cmd->cmd == CMD_LOAD) {
 164             struct vring_desc * name_desc = NULL;
 165             struct vring_desc * buf_desc = NULL;
 166             char * name = NULL;
 167             struct v3_sym_capsule * capsule = NULL;
 168             uint32_t offset = 0;
 169
 170
 171             PrintDebug("Descriptor Count=%d, index=%d\n", desc_cnt, q->cur_avail_idx % QUEUE_SIZE);
 172
 173             if (desc_cnt < 3) {
 174                 PrintError("Symmod loads must include at least 3 descriptors (cnt=%d)\n", desc_cnt);
 175                 return -1;
 176             }
 177
 178             name_desc = &(q->desc[desc_idx]);
 179
 180             if (v3_gpa_to_hva(core, name_desc->addr_gpa, (addr_t *)&name) == -1) {
 181                 PrintError("Could not translate SYMMOD header address\n");
 182                 return -1;
 183             }
 184
 185             desc_idx = name_desc->next;
 186
 187             capsule = v3_get_sym_capsule(core->vm_info, name);
 188
 189             for (i = 0; i < desc_cnt - 3; i++) {
 190                 uint8_t tmp_status = 0;
 191                 uint8_t * buf = NULL;
 192
 193                 buf_desc = &(q->desc[desc_idx]);
 194
 195                 if (v3_gpa_to_hva(core, buf_desc->addr_gpa, (addr_t *)&(buf)) == -1) {
 196                     PrintError("Could not translate buffer address\n");
 197                     return -1;
 198                 }
 199
 200                 memcpy(buf, capsule->start_addr + offset, buf_desc->length);
 201                 PrintDebug("Copying module to virtio buffers: SRC=%p, DST=%p, len=%d\n",
 202                            (void *)(capsule->start_addr + offset), (void *)buf, buf_desc->length);
 203
 204                 if (tmp_status != 0) {
 205                     PrintError("Error loading module segment\n");
 206                     status = tmp_status;
 207                 }
 208
 209
 210                 offset += buf_desc->length;
 211                 xfer_len += buf_desc->length;
 212                 desc_idx = buf_desc->next;
 213             }
 214         } else {
 215             PrintError("Invalid SYMMOD Loader command\n");
 216             return -1;
 217         }
 218
 219         status_desc = &(q->desc[desc_idx]);
 220
 221         if (v3_gpa_to_hva(core, status_desc->addr_gpa, (addr_t *)&status_ptr) == -1) {
 222             PrintError("SYMMOD Error could not translate status address\n");
 223             return -1;
 224         }
 225
 226         xfer_len += status_desc->length;
 227         *status_ptr = status;
 228
 229         PrintDebug("Transferred %d bytes (xfer_len)\n", xfer_len);
 230         q->used->ring[q->used->index % QUEUE_SIZE].id = q->avail->ring[q->cur_avail_idx % QUEUE_SIZE];
 231         q->used->ring[q->used->index % QUEUE_SIZE].length = xfer_len; // set to total inbound xfer length
 232
 233         q->used->index++;
 234         q->cur_avail_idx++;
 235
 236     }
 237
 238
 239     if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
 240         PrintDebug("Raising IRQ %d\n",  sym_state->pci_dev->config_header.intr_line);
 241         v3_pci_raise_irq(sym_state->pci_bus, 0, sym_state->pci_dev);
 242         sym_state->virtio_cfg.pci_isr = 1;
 243     }
 244
 245
 246     return 0;
 247 }
 248
 249
 250
 251
 252 static int handle_notification_kick(struct guest_info * core, struct virtio_sym_state * sym_state) {
 253     //    struct virtio_queue * q = sym_state->cur_queue;
 254     struct virtio_queue * q = &(sym_state->queue[NOTIFY_QUEUE]);
 255     struct hashtable_iter * capsule_iter = NULL;
 256
 257     PrintDebug("SYMMOD: VIRTIO SYMMOD Kick on notification queue\n");
 258
 259     capsule_iter = v3_create_htable_iter(sym_state->symmod_state->capsule_table);
 260
 261     do {
 262         uint16_t desc_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
 263         struct vring_desc * hdr_desc = NULL;
 264         struct symmod_hdr * hdr = NULL;
 265         struct v3_sym_capsule * capsule = NULL;
 266
 267
 268         capsule = (struct v3_sym_capsule *)v3_htable_get_iter_value(capsule_iter);
 269
 270
 271         PrintDebug("SYMMOD: Advertising Capsule %s\n", capsule->name);
 272
 273         if (capsule->type != V3_SYMMOD_LNX) {
 274             continue;
 275         }
 276
 277
 278
 279         if (q->cur_avail_idx == q->avail->index) {
 280             PrintError("Notification Queue Too SMALL\n");
 281             return -1;
 282         }
 283
 284         hdr_desc = &(q->desc[desc_idx]);
 285
 286         if (v3_gpa_to_hva(core, hdr_desc->addr_gpa, (addr_t *)&hdr) == -1) {
 287             PrintError("Could not translate SYMMOD header address\n");
 288             return -1;
 289         }
 290
 291         memset(hdr, 0, sizeof(struct symmod_hdr));
 292
 293
 294         memcpy(hdr->name, capsule->name, strlen(capsule->name));
 295         hdr->num_bytes = capsule->size;
 296         hdr->flags = capsule->flags;
 297         hdr->action = V3_SYMMOD_ACT_ADVERTISE;
 298
 299         q->used->ring[q->used->index % QUEUE_SIZE].id = q->avail->ring[q->cur_avail_idx % QUEUE_SIZE];
 300         q->used->ring[q->used->index % QUEUE_SIZE].length = sizeof(struct symmod_hdr) ; // set to total inbound xfer length
 301
 302         q->used->index++;
 303         q->cur_avail_idx++;
 304
 305     } while (v3_htable_iter_advance(capsule_iter));
 306
 307
 308     if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
 309         PrintDebug("Raising IRQ %d\n",  sym_state->pci_dev->config_header.intr_line);
 310         v3_pci_raise_irq(sym_state->pci_bus, 0, sym_state->pci_dev);
 311         sym_state->virtio_cfg.pci_isr = 1;
 312     }
 313
 314
 315     return 0;
 316 }
 317
 318
 319 static int virtio_io_write(struct guest_info * core, uint16_t port, void * src, uint_t length, void * private_data) {
 320     struct virtio_sym_state * sym_state = (struct virtio_sym_state *)private_data;
 321     int port_idx = port % sym_state->io_range_size;
 322
 323
 324     PrintDebug("SYMMOD: VIRTIO SYMMOD Write for port %d len=%d, value=%x\n",
 325                port, length, *(uint32_t *)src);
 326     PrintDebug("SYMMOD: port idx=%d\n", port_idx);
 327
 328
 329     switch (port_idx) {
 330         case GUEST_FEATURES_PORT:
 331             if (length != 4) {
 332                 PrintError("Illegal write length for guest features\n");
 333                 return -1;
 334             }
 335
 336             sym_state->virtio_cfg.guest_features = *(uint32_t *)src;
 337
 338             break;
 339         case VRING_PG_NUM_PORT:
 340             if (length == 4) {
 341                 addr_t pfn = *(uint32_t *)src;
 342                 addr_t page_addr = (pfn << VIRTIO_PAGE_SHIFT);
 343
 344                 sym_state->cur_queue->pfn = pfn;
 345
 346                 sym_state->cur_queue->ring_desc_addr = page_addr ;
 347                 sym_state->cur_queue->ring_avail_addr = page_addr + (QUEUE_SIZE * sizeof(struct vring_desc));
 348                 sym_state->cur_queue->ring_used_addr = ( sym_state->cur_queue->ring_avail_addr + \
 349                                                  sizeof(struct vring_avail)    + \
 350                                                  (QUEUE_SIZE * sizeof(uint16_t)));
 351
 352                 // round up to next page boundary.
 353                 sym_state->cur_queue->ring_used_addr = (sym_state->cur_queue->ring_used_addr + 0xfff) & ~0xfff;
 354
 355                 if (v3_gpa_to_hva(core, sym_state->cur_queue->ring_desc_addr, (addr_t *)&(sym_state->cur_queue->desc)) == -1) {
 356                     PrintError("Could not translate ring descriptor address\n");
 357                     return -1;
 358                 }
 359
 360
 361                 if (v3_gpa_to_hva(core, sym_state->cur_queue->ring_avail_addr, (addr_t *)&(sym_state->cur_queue->avail)) == -1) {
 362                     PrintError("Could not translate ring available address\n");
 363                     return -1;
 364                 }
 365
 366
 367                 if (v3_gpa_to_hva(core, sym_state->cur_queue->ring_used_addr, (addr_t *)&(sym_state->cur_queue->used)) == -1) {
 368                     PrintError("Could not translate ring used address\n");
 369                     return -1;
 370                 }
 371
 372                 PrintDebug("SYMMOD: RingDesc_addr=%p, Avail_addr=%p, Used_addr=%p\n",
 373                            (void *)(sym_state->cur_queue->ring_desc_addr),
 374                            (void *)(sym_state->cur_queue->ring_avail_addr),
 375                            (void *)(sym_state->cur_queue->ring_used_addr));
 376
 377                 PrintDebug("SYMMOD: RingDesc=%p, Avail=%p, Used=%p\n",
 378                            sym_state->cur_queue->desc, sym_state->cur_queue->avail, sym_state->cur_queue->used);
 379
 380             } else {
 381                 PrintError("Illegal write length for page frame number\n");
 382                 return -1;
 383             }
 384             break;
 385         case VRING_Q_SEL_PORT:
 386             sym_state->virtio_cfg.vring_queue_selector = *(uint16_t *)src;
 387
 388             if (sym_state->virtio_cfg.vring_queue_selector > NUM_QUEUES) {
 389                 PrintError("Virtio Symbiotic device has no qeueues. Selected %d\n",
 390                            sym_state->virtio_cfg.vring_queue_selector);
 391                 return -1;
 392             }
 393
 394             sym_state->cur_queue = &(sym_state->queue[sym_state->virtio_cfg.vring_queue_selector]);
 395
 396             break;
 397         case VRING_Q_NOTIFY_PORT: {
 398             uint16_t queue_idx = *(uint16_t *)src;
 399
 400             PrintDebug("SYMMOD: Handling Kick\n");
 401
 402             if (queue_idx == 0) {
 403                 if (handle_notification_kick(core, sym_state) == -1) {
 404                     PrintError("Could not handle Notification Kick\n");
 405                     return -1;
 406                 }
 407
 408                 sym_state->notifier_active = 1;
 409
 410             } else if (queue_idx == 1) {
 411                 if (handle_xfer_kick(core, sym_state) == -1) {
 412                     PrintError("Could not handle Symbiotic Notification\n");
 413                     return -1;
 414                 }
 415             } else {
 416                 PrintError("Kick on invalid queue (%d)\n", queue_idx);
 417                 return -1;
 418             }
 419
 420             break;
 421         }
 422         case VIRTIO_STATUS_PORT:
 423             sym_state->virtio_cfg.status = *(uint8_t *)src;
 424
 425             if (sym_state->virtio_cfg.status == 0) {
 426                 PrintDebug("SYMMOD: Resetting device\n");
 427                 virtio_reset(sym_state);
 428             }
 429
 430             break;
 431
 432         case VIRTIO_ISR_PORT:
 433             sym_state->virtio_cfg.pci_isr = *(uint8_t *)src;
 434             break;
 435         default:
 436             return -1;
 437             break;
 438     }
 439
 440     return length;
 441 }
 442
 443
 444 static int virtio_io_read(struct guest_info * core, uint16_t port, void * dst, uint_t length, void * private_data) {
 445
 446     struct virtio_sym_state * sym_state = (struct virtio_sym_state *)private_data;
 447     int port_idx = port % sym_state->io_range_size;
 448
 449 /*
 450     PrintDebug("SYMMOD: VIRTIO SYMBIOTIC Read  for port %d (index =%d), length=%d\n",
 451                port, port_idx, length);
 452 */
 453     switch (port_idx) {
 454         case HOST_FEATURES_PORT:
 455             if (length != 4) {
 456                 PrintError("Illegal read length for host features\n");
 457                 return -1;
 458             }
 459
 460             *(uint32_t *)dst = sym_state->virtio_cfg.host_features;
 461
 462             break;
 463         case VRING_PG_NUM_PORT:
 464             if (length != 4) {
 465                 PrintError("Illegal read length for page frame number\n");
 466                 return -1;
 467             }
 468
 469             *(uint32_t *)dst = sym_state->cur_queue->pfn;
 470
 471             break;
 472         case VRING_SIZE_PORT:
 473             if (length != 2) {
 474                 PrintError("Illegal read length for vring size\n");
 475                 return -1;
 476             }
 477
 478             *(uint16_t *)dst = sym_state->cur_queue->queue_size;
 479
 480             break;
 481
 482         case VIRTIO_STATUS_PORT:
 483             if (length != 1) {
 484                 PrintError("Illegal read length for status\n");
 485                 return -1;
 486             }
 487
 488             *(uint8_t *)dst = sym_state->virtio_cfg.status;
 489             break;
 490
 491         case VIRTIO_ISR_PORT:
 492             *(uint8_t *)dst = sym_state->virtio_cfg.pci_isr;
 493             sym_state->virtio_cfg.pci_isr = 0;
 494             v3_pci_lower_irq(sym_state->pci_bus, 0, sym_state->pci_dev);
 495             break;
 496
 497         default:
 498             if ( (port_idx >= sizeof(struct virtio_config)) &&
 499                  (port_idx < (sizeof(struct virtio_config) + sizeof(struct sym_config))) ) {
 500                 int cfg_offset = port_idx - sizeof(struct virtio_config);
 501                 uint8_t * cfg_ptr = (uint8_t *)&(sym_state->sym_cfg);
 502
 503                 memcpy(dst, cfg_ptr + cfg_offset, length);
 504
 505                 V3_Print("Reading SymConfig at idx %d (val=%x)\n", cfg_offset, *(uint32_t *)cfg_ptr);
 506
 507             } else {
 508                 PrintError("Read of Unhandled Virtio Read\n");
 509                 return -1;
 510             }
 511
 512             break;
 513     }
 514
 515     return length;
 516 }
 517
 518
 519
 520
 521 static int virtio_load_capsule(struct v3_vm_info * vm, struct v3_sym_capsule * mod, void * priv_data) {
 522     struct virtio_sym_state * virtio = (struct virtio_sym_state *)priv_data;
 523     //   struct virtio_queue * q = virtio->cur_queue;
 524     struct virtio_queue * q = &(virtio->queue[NOTIFY_QUEUE]);
 525
 526
 527     if (strlen(mod->name) >= 32) {
 528         PrintError("Capsule name is too long... (%d bytes) limit is 32\n", (uint32_t)strlen(mod->name));
 529         return -1;
 530     }
 531
 532     PrintDebug("SYMMOD: VIRTIO SYMMOD Loader: Loading Capsule (size=%d)\n", mod->size);
 533
 534     //queue is not set yet
 535     if (q->ring_avail_addr == 0) {
 536         PrintError("Queue is not set\n");
 537         return -1;
 538     }
 539
 540
 541     if (q->cur_avail_idx != q->avail->index) {
 542         uint16_t notifier_idx = q->avail->ring[q->cur_avail_idx % q->queue_size];
 543         struct symmod_hdr * notifier = NULL;
 544         struct vring_desc * notifier_desc = NULL;
 545
 546         PrintDebug("SYMMOD: Descriptor index=%d\n", q->cur_avail_idx % q->queue_size);
 547
 548         notifier_desc = &(q->desc[notifier_idx]);
 549
 550         PrintDebug("SYMMOD: Notifier Descriptor (ptr=%p) gpa=%p, len=%d, flags=%x, next=%d\n",
 551                    notifier_desc, (void *)(addr_t)(notifier_desc->addr_gpa),
 552                    notifier_desc->length, notifier_desc->flags,
 553                    notifier_desc->next);
 554
 555         if (v3_gpa_to_hva(&(vm->cores[0]), notifier_desc->addr_gpa, (addr_t *)&(notifier)) == -1) {
 556             PrintError("Could not translate receive buffer address\n");
 557             return -1;
 558         }
 559
 560         // clear the notifier
 561         memset(notifier, 0, sizeof(struct symmod_hdr));
 562
 563         // set the capsule name
 564         memcpy(notifier->name, mod->name, strlen(mod->name));
 565
 566         // set capsule length
 567         notifier->num_bytes = mod->size;
 568         notifier->flags = mod->flags;
 569         notifier->action =  V3_SYMMOD_ACT_LOAD;
 570
 571
 572         q->used->ring[q->used->index % q->queue_size].id = q->avail->ring[q->cur_avail_idx % q->queue_size];
 573
 574         q->used->ring[q->used->index % q->queue_size].length = sizeof(struct symmod_hdr);
 575
 576         q->used->index++;
 577         q->cur_avail_idx++;
 578     }
 579
 580     if (!(q->avail->flags & VIRTIO_NO_IRQ_FLAG)) {
 581         PrintDebug("SYMMOD: Raising IRQ %d\n",  virtio->pci_dev->config_header.intr_line);
 582         v3_pci_raise_irq(virtio->pci_bus, 0, virtio->pci_dev);
 583         virtio->virtio_cfg.pci_isr = 0x1;
 584     }
 585
 586
 587     return 0;
 588 }
 589
 590
 591 static int virtio_free(struct virtio_sym_state * virtio_state) {
 592     // unregister from PCI
 593
 594     V3_Free(virtio_state);
 595     return 0;
 596 }
 597
 598
 599 static struct v3_device_ops dev_ops = {
 600     .free = (int (*)(void *))virtio_free,
 601 };
 602
 603
 604
 605 static struct v3_symmod_loader_ops loader_ops = {
 606     .load_capsule = virtio_load_capsule,
 607 };
 608
 609
 610 static int virtio_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
 611     struct vm_device * pci_bus = v3_find_dev(vm, v3_cfg_val(cfg, "bus"));
 612     struct virtio_sym_state * virtio_state = NULL;
 613     struct v3_symmod_state * symmod_state = &(vm->sym_vm_state.symmod_state);
 614     struct pci_device * pci_dev = NULL;
 615     char * dev_id = v3_cfg_val(cfg, "ID");
 616
 617     PrintDebug("SYMMOD: Initializing VIRTIO Symbiotic Module device\n");
 618
 619     if (pci_bus == NULL) {
 620         PrintError("VirtIO devices require a PCI Bus");
 621         return -1;
 622     }
 623
 624     virtio_state  = (struct virtio_sym_state *)V3_Malloc(sizeof(struct virtio_sym_state));
 625     memset(virtio_state, 0, sizeof(struct virtio_sym_state));
 626
 627     virtio_state->vm = vm;
 628     virtio_state->symmod_state = symmod_state;
 629
 630
 631
 632
 633     struct vm_device * dev = v3_add_device(vm, dev_id, &dev_ops, virtio_state);
 634
 635     if (dev == NULL) {
 636         PrintError("Could not attach device %s\n", dev_id);
 637         V3_Free(virtio_state);
 638         return -1;
 639     }
 640
 641
 642     // PCI initialization
 643     {
 644         struct v3_pci_bar bars[6];
 645         int num_ports = sizeof(struct virtio_config) + sizeof(struct sym_config);
 646         int tmp_ports = num_ports;
 647         int i;
 648
 649
 650         // This gets the number of ports, rounded up to a power of 2
 651         virtio_state->io_range_size = 1; // must be a power of 2
 652
 653         while (tmp_ports > 0) {
 654             tmp_ports >>= 1;
 655             virtio_state->io_range_size <<= 1;
 656         }
 657
 658         // this is to account for any low order bits being set in num_ports
 659         // if there are none, then num_ports was already a power of 2 so we shift right to reset it
 660         if ((num_ports & ((virtio_state->io_range_size >> 1) - 1)) == 0) {
 661             virtio_state->io_range_size >>= 1;
 662         }
 663
 664
 665         for (i = 0; i < 6; i++) {
 666             bars[i].type = PCI_BAR_NONE;
 667         }
 668
 669         bars[0].type = PCI_BAR_IO;
 670         bars[0].default_base_port = -1;
 671         bars[0].num_ports = virtio_state->io_range_size;
 672
 673         bars[0].io_read = virtio_io_read;
 674         bars[0].io_write = virtio_io_write;
 675         bars[0].private_data = virtio_state;
 676
 677         pci_dev = v3_pci_register_device(pci_bus, PCI_STD_DEVICE,
 678                                          0, PCI_AUTO_DEV_NUM, 0,
 679                                          "LNX_VIRTIO_SYMMOD", bars,
 680                                          NULL, NULL, NULL, virtio_state);
 681
 682         if (!pci_dev) {
 683             PrintError("Could not register PCI Device\n");
 684             v3_remove_device(dev);
 685             return -1;
 686         }
 687
 688         pci_dev->config_header.vendor_id = VIRTIO_VENDOR_ID;
 689         pci_dev->config_header.subsystem_vendor_id = VIRTIO_SUBVENDOR_ID;
 690
 691
 692         pci_dev->config_header.device_id = VIRTIO_SYMMOD_DEV_ID;
 693         pci_dev->config_header.class = PCI_CLASS_MEMORY;
 694         pci_dev->config_header.subclass = PCI_MEM_SUBCLASS_RAM;
 695
 696         pci_dev->config_header.subsystem_id = VIRTIO_SYMMOD_SUBDEVICE_ID;
 697
 698
 699         pci_dev->config_header.intr_pin = 1;
 700
 701         pci_dev->config_header.max_latency = 1; // ?? (qemu does it...)
 702
 703
 704         virtio_state->pci_dev = pci_dev;
 705         virtio_state->pci_bus = pci_bus;
 706     }
 707
 708
 709     V3_Print("SYMMOD: %d available sym modules\n", virtio_state->sym_cfg.avail_mods);
 710
 711     virtio_reset(virtio_state);
 712
 713     v3_set_symmod_loader(vm, &loader_ops, virtio_state);
 714
 715     return 0;
 716 }
 717
 718
 719 device_register("LNX_VIRTIO_SYMMOD", virtio_init)