1 /* 2 * QEMU PCI bus manager 3 * 4 * Copyright (c) 2004 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include "hw/hw.h" 25 #include "hw/pci/pci.h" 26 #include "hw/pci/pci_bridge.h" 27 #include "hw/pci/pci_bus.h" 28 #include "hw/pci/pci_host.h" 29 #include "monitor/monitor.h" 30 #include "net/net.h" 31 #include "sysemu/sysemu.h" 32 #include "hw/loader.h" 33 #include "qemu/range.h" 34 #include "qmp-commands.h" 35 #include "hw/pci/msi.h" 36 #include "hw/pci/msix.h" 37 #include "exec/address-spaces.h" 38 #include "hw/hotplug.h" 39 40 //#define DEBUG_PCI 41 #ifdef DEBUG_PCI 42 # define PCI_DPRINTF(format, ...) printf(format, ## __VA_ARGS__) 43 #else 44 # define PCI_DPRINTF(format, ...) do { } while (0) 45 #endif 46 47 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent); 48 static char *pcibus_get_dev_path(DeviceState *dev); 49 static char *pcibus_get_fw_dev_path(DeviceState *dev); 50 static void pcibus_reset(BusState *qbus); 51 52 static Property pci_props[] = { 53 DEFINE_PROP_PCI_DEVFN("addr", PCIDevice, devfn, -1), 54 DEFINE_PROP_STRING("romfile", PCIDevice, romfile), 55 DEFINE_PROP_UINT32("rombar", PCIDevice, rom_bar, 1), 56 DEFINE_PROP_BIT("multifunction", PCIDevice, cap_present, 57 QEMU_PCI_CAP_MULTIFUNCTION_BITNR, false), 58 DEFINE_PROP_BIT("command_serr_enable", PCIDevice, cap_present, 59 QEMU_PCI_CAP_SERR_BITNR, true), 60 DEFINE_PROP_END_OF_LIST() 61 }; 62 63 static const VMStateDescription vmstate_pcibus = { 64 .name = "PCIBUS", 65 .version_id = 1, 66 .minimum_version_id = 1, 67 .fields = (VMStateField[]) { 68 VMSTATE_INT32_EQUAL(nirq, PCIBus), 69 VMSTATE_VARRAY_INT32(irq_count, PCIBus, 70 nirq, 0, vmstate_info_int32, 71 int32_t), 72 VMSTATE_END_OF_LIST() 73 } 74 }; 75 76 static void pci_bus_realize(BusState *qbus, Error **errp) 77 { 78 PCIBus *bus = PCI_BUS(qbus); 79 80 vmstate_register(NULL, -1, &vmstate_pcibus, bus); 81 } 82 83 static void pci_bus_unrealize(BusState *qbus, Error **errp) 84 { 85 PCIBus *bus = PCI_BUS(qbus); 86 87 vmstate_unregister(NULL, &vmstate_pcibus, bus); 88 } 89 90 static void pci_bus_class_init(ObjectClass *klass, void *data) 91 { 92 BusClass *k = BUS_CLASS(klass); 93 94 k->print_dev = pcibus_dev_print; 95 k->get_dev_path = pcibus_get_dev_path; 96 k->get_fw_dev_path = pcibus_get_fw_dev_path; 97 k->realize = pci_bus_realize; 98 k->unrealize = pci_bus_unrealize; 99 k->reset = pcibus_reset; 100 } 101 102 static const TypeInfo pci_bus_info = { 103 .name = TYPE_PCI_BUS, 104 .parent = TYPE_BUS, 105 .instance_size = sizeof(PCIBus), 106 .class_init = pci_bus_class_init, 107 }; 108 109 static const TypeInfo pcie_bus_info = { 110 .name = TYPE_PCIE_BUS, 111 .parent = TYPE_PCI_BUS, 112 }; 113 114 static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num); 115 static void pci_update_mappings(PCIDevice *d); 116 static void pci_irq_handler(void *opaque, int irq_num, int level); 117 static int pci_add_option_rom(PCIDevice *pdev, bool is_default_rom); 118 static void pci_del_option_rom(PCIDevice *pdev); 119 120 static uint16_t pci_default_sub_vendor_id = PCI_SUBVENDOR_ID_REDHAT_QUMRANET; 121 static uint16_t pci_default_sub_device_id = PCI_SUBDEVICE_ID_QEMU; 122 123 static QLIST_HEAD(, PCIHostState) pci_host_bridges; 124 125 static int pci_bar(PCIDevice *d, int reg) 126 { 127 uint8_t type; 128 129 if (reg != PCI_ROM_SLOT) 130 return PCI_BASE_ADDRESS_0 + reg * 4; 131 132 type = d->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION; 133 return type == PCI_HEADER_TYPE_BRIDGE ? PCI_ROM_ADDRESS1 : PCI_ROM_ADDRESS; 134 } 135 136 static inline int pci_irq_state(PCIDevice *d, int irq_num) 137 { 138 return (d->irq_state >> irq_num) & 0x1; 139 } 140 141 static inline void pci_set_irq_state(PCIDevice *d, int irq_num, int level) 142 { 143 d->irq_state &= ~(0x1 << irq_num); 144 d->irq_state |= level << irq_num; 145 } 146 147 static void pci_change_irq_level(PCIDevice *pci_dev, int irq_num, int change) 148 { 149 PCIBus *bus; 150 for (;;) { 151 bus = pci_dev->bus; 152 irq_num = bus->map_irq(pci_dev, irq_num); 153 if (bus->set_irq) 154 break; 155 pci_dev = bus->parent_dev; 156 } 157 bus->irq_count[irq_num] += change; 158 bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0); 159 } 160 161 int pci_bus_get_irq_level(PCIBus *bus, int irq_num) 162 { 163 assert(irq_num >= 0); 164 assert(irq_num < bus->nirq); 165 return !!bus->irq_count[irq_num]; 166 } 167 168 /* Update interrupt status bit in config space on interrupt 169 * state change. */ 170 static void pci_update_irq_status(PCIDevice *dev) 171 { 172 if (dev->irq_state) { 173 dev->config[PCI_STATUS] |= PCI_STATUS_INTERRUPT; 174 } else { 175 dev->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT; 176 } 177 } 178 179 void pci_device_deassert_intx(PCIDevice *dev) 180 { 181 int i; 182 for (i = 0; i < PCI_NUM_PINS; ++i) { 183 pci_irq_handler(dev, i, 0); 184 } 185 } 186 187 static void pci_do_device_reset(PCIDevice *dev) 188 { 189 int r; 190 191 pci_device_deassert_intx(dev); 192 assert(dev->irq_state == 0); 193 194 /* Clear all writable bits */ 195 pci_word_test_and_clear_mask(dev->config + PCI_COMMAND, 196 pci_get_word(dev->wmask + PCI_COMMAND) | 197 pci_get_word(dev->w1cmask + PCI_COMMAND)); 198 pci_word_test_and_clear_mask(dev->config + PCI_STATUS, 199 pci_get_word(dev->wmask + PCI_STATUS) | 200 pci_get_word(dev->w1cmask + PCI_STATUS)); 201 dev->config[PCI_CACHE_LINE_SIZE] = 0x0; 202 dev->config[PCI_INTERRUPT_LINE] = 0x0; 203 for (r = 0; r < PCI_NUM_REGIONS; ++r) { 204 PCIIORegion *region = &dev->io_regions[r]; 205 if (!region->size) { 206 continue; 207 } 208 209 if (!(region->type & PCI_BASE_ADDRESS_SPACE_IO) && 210 region->type & PCI_BASE_ADDRESS_MEM_TYPE_64) { 211 pci_set_quad(dev->config + pci_bar(dev, r), region->type); 212 } else { 213 pci_set_long(dev->config + pci_bar(dev, r), region->type); 214 } 215 } 216 pci_update_mappings(dev); 217 218 msi_reset(dev); 219 msix_reset(dev); 220 } 221 222 /* 223 * This function is called on #RST and FLR. 224 * FLR if PCI_EXP_DEVCTL_BCR_FLR is set 225 */ 226 void pci_device_reset(PCIDevice *dev) 227 { 228 qdev_reset_all(&dev->qdev); 229 pci_do_device_reset(dev); 230 } 231 232 /* 233 * Trigger pci bus reset under a given bus. 234 * Called via qbus_reset_all on RST# assert, after the devices 235 * have been reset qdev_reset_all-ed already. 236 */ 237 static void pcibus_reset(BusState *qbus) 238 { 239 PCIBus *bus = DO_UPCAST(PCIBus, qbus, qbus); 240 int i; 241 242 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { 243 if (bus->devices[i]) { 244 pci_do_device_reset(bus->devices[i]); 245 } 246 } 247 248 for (i = 0; i < bus->nirq; i++) { 249 assert(bus->irq_count[i] == 0); 250 } 251 } 252 253 static void pci_host_bus_register(PCIBus *bus, DeviceState *parent) 254 { 255 PCIHostState *host_bridge = PCI_HOST_BRIDGE(parent); 256 257 QLIST_INSERT_HEAD(&pci_host_bridges, host_bridge, next); 258 } 259 260 PCIBus *pci_find_primary_bus(void) 261 { 262 PCIBus *primary_bus = NULL; 263 PCIHostState *host; 264 265 QLIST_FOREACH(host, &pci_host_bridges, next) { 266 if (primary_bus) { 267 /* We have multiple root buses, refuse to select a primary */ 268 return NULL; 269 } 270 primary_bus = host->bus; 271 } 272 273 return primary_bus; 274 } 275 276 PCIBus *pci_device_root_bus(const PCIDevice *d) 277 { 278 PCIBus *bus = d->bus; 279 280 while ((d = bus->parent_dev) != NULL) { 281 bus = d->bus; 282 } 283 284 return bus; 285 } 286 287 const char *pci_root_bus_path(PCIDevice *dev) 288 { 289 PCIBus *rootbus = pci_device_root_bus(dev); 290 PCIHostState *host_bridge = PCI_HOST_BRIDGE(rootbus->qbus.parent); 291 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_GET_CLASS(host_bridge); 292 293 assert(!rootbus->parent_dev); 294 assert(host_bridge->bus == rootbus); 295 296 if (hc->root_bus_path) { 297 return (*hc->root_bus_path)(host_bridge, rootbus); 298 } 299 300 return rootbus->qbus.name; 301 } 302 303 static void pci_bus_init(PCIBus *bus, DeviceState *parent, 304 const char *name, 305 MemoryRegion *address_space_mem, 306 MemoryRegion *address_space_io, 307 uint8_t devfn_min) 308 { 309 assert(PCI_FUNC(devfn_min) == 0); 310 bus->devfn_min = devfn_min; 311 bus->address_space_mem = address_space_mem; 312 bus->address_space_io = address_space_io; 313 314 /* host bridge */ 315 QLIST_INIT(&bus->child); 316 317 pci_host_bus_register(bus, parent); 318 } 319 320 bool pci_bus_is_express(PCIBus *bus) 321 { 322 return object_dynamic_cast(OBJECT(bus), TYPE_PCIE_BUS); 323 } 324 325 bool pci_bus_is_root(PCIBus *bus) 326 { 327 return !bus->parent_dev; 328 } 329 330 void pci_bus_new_inplace(PCIBus *bus, size_t bus_size, DeviceState *parent, 331 const char *name, 332 MemoryRegion *address_space_mem, 333 MemoryRegion *address_space_io, 334 uint8_t devfn_min, const char *typename) 335 { 336 qbus_create_inplace(bus, bus_size, typename, parent, name); 337 pci_bus_init(bus, parent, name, address_space_mem, 338 address_space_io, devfn_min); 339 } 340 341 PCIBus *pci_bus_new(DeviceState *parent, const char *name, 342 MemoryRegion *address_space_mem, 343 MemoryRegion *address_space_io, 344 uint8_t devfn_min, const char *typename) 345 { 346 PCIBus *bus; 347 348 bus = PCI_BUS(qbus_create(typename, parent, name)); 349 pci_bus_init(bus, parent, name, address_space_mem, 350 address_space_io, devfn_min); 351 return bus; 352 } 353 354 void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq, 355 void *irq_opaque, int nirq) 356 { 357 bus->set_irq = set_irq; 358 bus->map_irq = map_irq; 359 bus->irq_opaque = irq_opaque; 360 bus->nirq = nirq; 361 bus->irq_count = g_malloc0(nirq * sizeof(bus->irq_count[0])); 362 } 363 364 PCIBus *pci_register_bus(DeviceState *parent, const char *name, 365 pci_set_irq_fn set_irq, pci_map_irq_fn map_irq, 366 void *irq_opaque, 367 MemoryRegion *address_space_mem, 368 MemoryRegion *address_space_io, 369 uint8_t devfn_min, int nirq, const char *typename) 370 { 371 PCIBus *bus; 372 373 bus = pci_bus_new(parent, name, address_space_mem, 374 address_space_io, devfn_min, typename); 375 pci_bus_irqs(bus, set_irq, map_irq, irq_opaque, nirq); 376 return bus; 377 } 378 379 int pci_bus_num(PCIBus *s) 380 { 381 if (pci_bus_is_root(s)) 382 return 0; /* pci host bridge */ 383 return s->parent_dev->config[PCI_SECONDARY_BUS]; 384 } 385 386 static int get_pci_config_device(QEMUFile *f, void *pv, size_t size) 387 { 388 PCIDevice *s = container_of(pv, PCIDevice, config); 389 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(s); 390 uint8_t *config; 391 int i; 392 393 assert(size == pci_config_size(s)); 394 config = g_malloc(size); 395 396 qemu_get_buffer(f, config, size); 397 for (i = 0; i < size; ++i) { 398 if ((config[i] ^ s->config[i]) & 399 s->cmask[i] & ~s->wmask[i] & ~s->w1cmask[i]) { 400 g_free(config); 401 return -EINVAL; 402 } 403 } 404 memcpy(s->config, config, size); 405 406 pci_update_mappings(s); 407 if (pc->is_bridge) { 408 PCIBridge *b = PCI_BRIDGE(s); 409 pci_bridge_update_mappings(b); 410 } 411 412 memory_region_set_enabled(&s->bus_master_enable_region, 413 pci_get_word(s->config + PCI_COMMAND) 414 & PCI_COMMAND_MASTER); 415 416 g_free(config); 417 return 0; 418 } 419 420 /* just put buffer */ 421 static void put_pci_config_device(QEMUFile *f, void *pv, size_t size) 422 { 423 const uint8_t **v = pv; 424 assert(size == pci_config_size(container_of(pv, PCIDevice, config))); 425 qemu_put_buffer(f, *v, size); 426 } 427 428 static VMStateInfo vmstate_info_pci_config = { 429 .name = "pci config", 430 .get = get_pci_config_device, 431 .put = put_pci_config_device, 432 }; 433 434 static int get_pci_irq_state(QEMUFile *f, void *pv, size_t size) 435 { 436 PCIDevice *s = container_of(pv, PCIDevice, irq_state); 437 uint32_t irq_state[PCI_NUM_PINS]; 438 int i; 439 for (i = 0; i < PCI_NUM_PINS; ++i) { 440 irq_state[i] = qemu_get_be32(f); 441 if (irq_state[i] != 0x1 && irq_state[i] != 0) { 442 fprintf(stderr, "irq state %d: must be 0 or 1.\n", 443 irq_state[i]); 444 return -EINVAL; 445 } 446 } 447 448 for (i = 0; i < PCI_NUM_PINS; ++i) { 449 pci_set_irq_state(s, i, irq_state[i]); 450 } 451 452 return 0; 453 } 454 455 static void put_pci_irq_state(QEMUFile *f, void *pv, size_t size) 456 { 457 int i; 458 PCIDevice *s = container_of(pv, PCIDevice, irq_state); 459 460 for (i = 0; i < PCI_NUM_PINS; ++i) { 461 qemu_put_be32(f, pci_irq_state(s, i)); 462 } 463 } 464 465 static VMStateInfo vmstate_info_pci_irq_state = { 466 .name = "pci irq state", 467 .get = get_pci_irq_state, 468 .put = put_pci_irq_state, 469 }; 470 471 const VMStateDescription vmstate_pci_device = { 472 .name = "PCIDevice", 473 .version_id = 2, 474 .minimum_version_id = 1, 475 .fields = (VMStateField[]) { 476 VMSTATE_INT32_POSITIVE_LE(version_id, PCIDevice), 477 VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0, 478 vmstate_info_pci_config, 479 PCI_CONFIG_SPACE_SIZE), 480 VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2, 481 vmstate_info_pci_irq_state, 482 PCI_NUM_PINS * sizeof(int32_t)), 483 VMSTATE_END_OF_LIST() 484 } 485 }; 486 487 const VMStateDescription vmstate_pcie_device = { 488 .name = "PCIEDevice", 489 .version_id = 2, 490 .minimum_version_id = 1, 491 .fields = (VMStateField[]) { 492 VMSTATE_INT32_POSITIVE_LE(version_id, PCIDevice), 493 VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0, 494 vmstate_info_pci_config, 495 PCIE_CONFIG_SPACE_SIZE), 496 VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2, 497 vmstate_info_pci_irq_state, 498 PCI_NUM_PINS * sizeof(int32_t)), 499 VMSTATE_END_OF_LIST() 500 } 501 }; 502 503 static inline const VMStateDescription *pci_get_vmstate(PCIDevice *s) 504 { 505 return pci_is_express(s) ? &vmstate_pcie_device : &vmstate_pci_device; 506 } 507 508 void pci_device_save(PCIDevice *s, QEMUFile *f) 509 { 510 /* Clear interrupt status bit: it is implicit 511 * in irq_state which we are saving. 512 * This makes us compatible with old devices 513 * which never set or clear this bit. */ 514 s->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT; 515 vmstate_save_state(f, pci_get_vmstate(s), s); 516 /* Restore the interrupt status bit. */ 517 pci_update_irq_status(s); 518 } 519 520 int pci_device_load(PCIDevice *s, QEMUFile *f) 521 { 522 int ret; 523 ret = vmstate_load_state(f, pci_get_vmstate(s), s, s->version_id); 524 /* Restore the interrupt status bit. */ 525 pci_update_irq_status(s); 526 return ret; 527 } 528 529 static void pci_set_default_subsystem_id(PCIDevice *pci_dev) 530 { 531 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID, 532 pci_default_sub_vendor_id); 533 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID, 534 pci_default_sub_device_id); 535 } 536 537 /* 538 * Parse [[<domain>:]<bus>:]<slot>, return -1 on error if funcp == NULL 539 * [[<domain>:]<bus>:]<slot>.<func>, return -1 on error 540 */ 541 int pci_parse_devaddr(const char *addr, int *domp, int *busp, 542 unsigned int *slotp, unsigned int *funcp) 543 { 544 const char *p; 545 char *e; 546 unsigned long val; 547 unsigned long dom = 0, bus = 0; 548 unsigned int slot = 0; 549 unsigned int func = 0; 550 551 p = addr; 552 val = strtoul(p, &e, 16); 553 if (e == p) 554 return -1; 555 if (*e == ':') { 556 bus = val; 557 p = e + 1; 558 val = strtoul(p, &e, 16); 559 if (e == p) 560 return -1; 561 if (*e == ':') { 562 dom = bus; 563 bus = val; 564 p = e + 1; 565 val = strtoul(p, &e, 16); 566 if (e == p) 567 return -1; 568 } 569 } 570 571 slot = val; 572 573 if (funcp != NULL) { 574 if (*e != '.') 575 return -1; 576 577 p = e + 1; 578 val = strtoul(p, &e, 16); 579 if (e == p) 580 return -1; 581 582 func = val; 583 } 584 585 /* if funcp == NULL func is 0 */ 586 if (dom > 0xffff || bus > 0xff || slot > 0x1f || func > 7) 587 return -1; 588 589 if (*e) 590 return -1; 591 592 *domp = dom; 593 *busp = bus; 594 *slotp = slot; 595 if (funcp != NULL) 596 *funcp = func; 597 return 0; 598 } 599 600 PCIBus *pci_get_bus_devfn(int *devfnp, PCIBus *root, const char *devaddr) 601 { 602 int dom, bus; 603 unsigned slot; 604 605 if (!root) { 606 fprintf(stderr, "No primary PCI bus\n"); 607 return NULL; 608 } 609 610 assert(!root->parent_dev); 611 612 if (!devaddr) { 613 *devfnp = -1; 614 return pci_find_bus_nr(root, 0); 615 } 616 617 if (pci_parse_devaddr(devaddr, &dom, &bus, &slot, NULL) < 0) { 618 return NULL; 619 } 620 621 if (dom != 0) { 622 fprintf(stderr, "No support for non-zero PCI domains\n"); 623 return NULL; 624 } 625 626 *devfnp = PCI_DEVFN(slot, 0); 627 return pci_find_bus_nr(root, bus); 628 } 629 630 static void pci_init_cmask(PCIDevice *dev) 631 { 632 pci_set_word(dev->cmask + PCI_VENDOR_ID, 0xffff); 633 pci_set_word(dev->cmask + PCI_DEVICE_ID, 0xffff); 634 dev->cmask[PCI_STATUS] = PCI_STATUS_CAP_LIST; 635 dev->cmask[PCI_REVISION_ID] = 0xff; 636 dev->cmask[PCI_CLASS_PROG] = 0xff; 637 pci_set_word(dev->cmask + PCI_CLASS_DEVICE, 0xffff); 638 dev->cmask[PCI_HEADER_TYPE] = 0xff; 639 dev->cmask[PCI_CAPABILITY_LIST] = 0xff; 640 } 641 642 static void pci_init_wmask(PCIDevice *dev) 643 { 644 int config_size = pci_config_size(dev); 645 646 dev->wmask[PCI_CACHE_LINE_SIZE] = 0xff; 647 dev->wmask[PCI_INTERRUPT_LINE] = 0xff; 648 pci_set_word(dev->wmask + PCI_COMMAND, 649 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 650 PCI_COMMAND_INTX_DISABLE); 651 if (dev->cap_present & QEMU_PCI_CAP_SERR) { 652 pci_word_test_and_set_mask(dev->wmask + PCI_COMMAND, PCI_COMMAND_SERR); 653 } 654 655 memset(dev->wmask + PCI_CONFIG_HEADER_SIZE, 0xff, 656 config_size - PCI_CONFIG_HEADER_SIZE); 657 } 658 659 static void pci_init_w1cmask(PCIDevice *dev) 660 { 661 /* 662 * Note: It's okay to set w1cmask even for readonly bits as 663 * long as their value is hardwired to 0. 664 */ 665 pci_set_word(dev->w1cmask + PCI_STATUS, 666 PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT | 667 PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT | 668 PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY); 669 } 670 671 static void pci_init_mask_bridge(PCIDevice *d) 672 { 673 /* PCI_PRIMARY_BUS, PCI_SECONDARY_BUS, PCI_SUBORDINATE_BUS and 674 PCI_SEC_LETENCY_TIMER */ 675 memset(d->wmask + PCI_PRIMARY_BUS, 0xff, 4); 676 677 /* base and limit */ 678 d->wmask[PCI_IO_BASE] = PCI_IO_RANGE_MASK & 0xff; 679 d->wmask[PCI_IO_LIMIT] = PCI_IO_RANGE_MASK & 0xff; 680 pci_set_word(d->wmask + PCI_MEMORY_BASE, 681 PCI_MEMORY_RANGE_MASK & 0xffff); 682 pci_set_word(d->wmask + PCI_MEMORY_LIMIT, 683 PCI_MEMORY_RANGE_MASK & 0xffff); 684 pci_set_word(d->wmask + PCI_PREF_MEMORY_BASE, 685 PCI_PREF_RANGE_MASK & 0xffff); 686 pci_set_word(d->wmask + PCI_PREF_MEMORY_LIMIT, 687 PCI_PREF_RANGE_MASK & 0xffff); 688 689 /* PCI_PREF_BASE_UPPER32 and PCI_PREF_LIMIT_UPPER32 */ 690 memset(d->wmask + PCI_PREF_BASE_UPPER32, 0xff, 8); 691 692 /* Supported memory and i/o types */ 693 d->config[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_16; 694 d->config[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_16; 695 pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_BASE, 696 PCI_PREF_RANGE_TYPE_64); 697 pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_LIMIT, 698 PCI_PREF_RANGE_TYPE_64); 699 700 /* 701 * TODO: Bridges default to 10-bit VGA decoding but we currently only 702 * implement 16-bit decoding (no alias support). 703 */ 704 pci_set_word(d->wmask + PCI_BRIDGE_CONTROL, 705 PCI_BRIDGE_CTL_PARITY | 706 PCI_BRIDGE_CTL_SERR | 707 PCI_BRIDGE_CTL_ISA | 708 PCI_BRIDGE_CTL_VGA | 709 PCI_BRIDGE_CTL_VGA_16BIT | 710 PCI_BRIDGE_CTL_MASTER_ABORT | 711 PCI_BRIDGE_CTL_BUS_RESET | 712 PCI_BRIDGE_CTL_FAST_BACK | 713 PCI_BRIDGE_CTL_DISCARD | 714 PCI_BRIDGE_CTL_SEC_DISCARD | 715 PCI_BRIDGE_CTL_DISCARD_SERR); 716 /* Below does not do anything as we never set this bit, put here for 717 * completeness. */ 718 pci_set_word(d->w1cmask + PCI_BRIDGE_CONTROL, 719 PCI_BRIDGE_CTL_DISCARD_STATUS); 720 d->cmask[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_MASK; 721 d->cmask[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_MASK; 722 pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_BASE, 723 PCI_PREF_RANGE_TYPE_MASK); 724 pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_LIMIT, 725 PCI_PREF_RANGE_TYPE_MASK); 726 } 727 728 static int pci_init_multifunction(PCIBus *bus, PCIDevice *dev) 729 { 730 uint8_t slot = PCI_SLOT(dev->devfn); 731 uint8_t func; 732 733 if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { 734 dev->config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION; 735 } 736 737 /* 738 * multifunction bit is interpreted in two ways as follows. 739 * - all functions must set the bit to 1. 740 * Example: Intel X53 741 * - function 0 must set the bit, but the rest function (> 0) 742 * is allowed to leave the bit to 0. 743 * Example: PIIX3(also in qemu), PIIX4(also in qemu), ICH10, 744 * 745 * So OS (at least Linux) checks the bit of only function 0, 746 * and doesn't see the bit of function > 0. 747 * 748 * The below check allows both interpretation. 749 */ 750 if (PCI_FUNC(dev->devfn)) { 751 PCIDevice *f0 = bus->devices[PCI_DEVFN(slot, 0)]; 752 if (f0 && !(f0->cap_present & QEMU_PCI_CAP_MULTIFUNCTION)) { 753 /* function 0 should set multifunction bit */ 754 error_report("PCI: single function device can't be populated " 755 "in function %x.%x", slot, PCI_FUNC(dev->devfn)); 756 return -1; 757 } 758 return 0; 759 } 760 761 if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { 762 return 0; 763 } 764 /* function 0 indicates single function, so function > 0 must be NULL */ 765 for (func = 1; func < PCI_FUNC_MAX; ++func) { 766 if (bus->devices[PCI_DEVFN(slot, func)]) { 767 error_report("PCI: %x.0 indicates single function, " 768 "but %x.%x is already populated.", 769 slot, slot, func); 770 return -1; 771 } 772 } 773 return 0; 774 } 775 776 static void pci_config_alloc(PCIDevice *pci_dev) 777 { 778 int config_size = pci_config_size(pci_dev); 779 780 pci_dev->config = g_malloc0(config_size); 781 pci_dev->cmask = g_malloc0(config_size); 782 pci_dev->wmask = g_malloc0(config_size); 783 pci_dev->w1cmask = g_malloc0(config_size); 784 pci_dev->used = g_malloc0(config_size); 785 } 786 787 static void pci_config_free(PCIDevice *pci_dev) 788 { 789 g_free(pci_dev->config); 790 g_free(pci_dev->cmask); 791 g_free(pci_dev->wmask); 792 g_free(pci_dev->w1cmask); 793 g_free(pci_dev->used); 794 } 795 796 static void do_pci_unregister_device(PCIDevice *pci_dev) 797 { 798 pci_dev->bus->devices[pci_dev->devfn] = NULL; 799 pci_config_free(pci_dev); 800 801 address_space_destroy(&pci_dev->bus_master_as); 802 memory_region_destroy(&pci_dev->bus_master_enable_region); 803 } 804 805 /* -1 for devfn means auto assign */ 806 static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus, 807 const char *name, int devfn) 808 { 809 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev); 810 PCIConfigReadFunc *config_read = pc->config_read; 811 PCIConfigWriteFunc *config_write = pc->config_write; 812 AddressSpace *dma_as; 813 814 if (devfn < 0) { 815 for(devfn = bus->devfn_min ; devfn < ARRAY_SIZE(bus->devices); 816 devfn += PCI_FUNC_MAX) { 817 if (!bus->devices[devfn]) 818 goto found; 819 } 820 error_report("PCI: no slot/function available for %s, all in use", name); 821 return NULL; 822 found: ; 823 } else if (bus->devices[devfn]) { 824 error_report("PCI: slot %d function %d not available for %s, in use by %s", 825 PCI_SLOT(devfn), PCI_FUNC(devfn), name, bus->devices[devfn]->name); 826 return NULL; 827 } 828 829 pci_dev->bus = bus; 830 dma_as = pci_device_iommu_address_space(pci_dev); 831 832 memory_region_init_alias(&pci_dev->bus_master_enable_region, 833 OBJECT(pci_dev), "bus master", 834 dma_as->root, 0, memory_region_size(dma_as->root)); 835 memory_region_set_enabled(&pci_dev->bus_master_enable_region, false); 836 address_space_init(&pci_dev->bus_master_as, &pci_dev->bus_master_enable_region, 837 name); 838 839 pci_dev->devfn = devfn; 840 pstrcpy(pci_dev->name, sizeof(pci_dev->name), name); 841 pci_dev->irq_state = 0; 842 pci_config_alloc(pci_dev); 843 844 pci_config_set_vendor_id(pci_dev->config, pc->vendor_id); 845 pci_config_set_device_id(pci_dev->config, pc->device_id); 846 pci_config_set_revision(pci_dev->config, pc->revision); 847 pci_config_set_class(pci_dev->config, pc->class_id); 848 849 if (!pc->is_bridge) { 850 if (pc->subsystem_vendor_id || pc->subsystem_id) { 851 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID, 852 pc->subsystem_vendor_id); 853 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID, 854 pc->subsystem_id); 855 } else { 856 pci_set_default_subsystem_id(pci_dev); 857 } 858 } else { 859 /* subsystem_vendor_id/subsystem_id are only for header type 0 */ 860 assert(!pc->subsystem_vendor_id); 861 assert(!pc->subsystem_id); 862 } 863 pci_init_cmask(pci_dev); 864 pci_init_wmask(pci_dev); 865 pci_init_w1cmask(pci_dev); 866 if (pc->is_bridge) { 867 pci_init_mask_bridge(pci_dev); 868 } 869 if (pci_init_multifunction(bus, pci_dev)) { 870 do_pci_unregister_device(pci_dev); 871 return NULL; 872 } 873 874 if (!config_read) 875 config_read = pci_default_read_config; 876 if (!config_write) 877 config_write = pci_default_write_config; 878 pci_dev->config_read = config_read; 879 pci_dev->config_write = config_write; 880 bus->devices[devfn] = pci_dev; 881 pci_dev->version_id = 2; /* Current pci device vmstate version */ 882 return pci_dev; 883 } 884 885 static void pci_unregister_io_regions(PCIDevice *pci_dev) 886 { 887 PCIIORegion *r; 888 int i; 889 890 for(i = 0; i < PCI_NUM_REGIONS; i++) { 891 r = &pci_dev->io_regions[i]; 892 if (!r->size || r->addr == PCI_BAR_UNMAPPED) 893 continue; 894 memory_region_del_subregion(r->address_space, r->memory); 895 } 896 897 pci_unregister_vga(pci_dev); 898 } 899 900 static int pci_unregister_device(DeviceState *dev) 901 { 902 PCIDevice *pci_dev = PCI_DEVICE(dev); 903 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev); 904 905 pci_unregister_io_regions(pci_dev); 906 pci_del_option_rom(pci_dev); 907 908 if (pc->exit) { 909 pc->exit(pci_dev); 910 } 911 912 do_pci_unregister_device(pci_dev); 913 return 0; 914 } 915 916 void pci_register_bar(PCIDevice *pci_dev, int region_num, 917 uint8_t type, MemoryRegion *memory) 918 { 919 PCIIORegion *r; 920 uint32_t addr; 921 uint64_t wmask; 922 pcibus_t size = memory_region_size(memory); 923 924 assert(region_num >= 0); 925 assert(region_num < PCI_NUM_REGIONS); 926 if (size & (size-1)) { 927 fprintf(stderr, "ERROR: PCI region size must be pow2 " 928 "type=0x%x, size=0x%"FMT_PCIBUS"\n", type, size); 929 exit(1); 930 } 931 932 r = &pci_dev->io_regions[region_num]; 933 r->addr = PCI_BAR_UNMAPPED; 934 r->size = size; 935 r->type = type; 936 r->memory = NULL; 937 938 wmask = ~(size - 1); 939 addr = pci_bar(pci_dev, region_num); 940 if (region_num == PCI_ROM_SLOT) { 941 /* ROM enable bit is writable */ 942 wmask |= PCI_ROM_ADDRESS_ENABLE; 943 } 944 pci_set_long(pci_dev->config + addr, type); 945 if (!(r->type & PCI_BASE_ADDRESS_SPACE_IO) && 946 r->type & PCI_BASE_ADDRESS_MEM_TYPE_64) { 947 pci_set_quad(pci_dev->wmask + addr, wmask); 948 pci_set_quad(pci_dev->cmask + addr, ~0ULL); 949 } else { 950 pci_set_long(pci_dev->wmask + addr, wmask & 0xffffffff); 951 pci_set_long(pci_dev->cmask + addr, 0xffffffff); 952 } 953 pci_dev->io_regions[region_num].memory = memory; 954 pci_dev->io_regions[region_num].address_space 955 = type & PCI_BASE_ADDRESS_SPACE_IO 956 ? pci_dev->bus->address_space_io 957 : pci_dev->bus->address_space_mem; 958 } 959 960 static void pci_update_vga(PCIDevice *pci_dev) 961 { 962 uint16_t cmd; 963 964 if (!pci_dev->has_vga) { 965 return; 966 } 967 968 cmd = pci_get_word(pci_dev->config + PCI_COMMAND); 969 970 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_MEM], 971 cmd & PCI_COMMAND_MEMORY); 972 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO], 973 cmd & PCI_COMMAND_IO); 974 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI], 975 cmd & PCI_COMMAND_IO); 976 } 977 978 void pci_register_vga(PCIDevice *pci_dev, MemoryRegion *mem, 979 MemoryRegion *io_lo, MemoryRegion *io_hi) 980 { 981 assert(!pci_dev->has_vga); 982 983 assert(memory_region_size(mem) == QEMU_PCI_VGA_MEM_SIZE); 984 pci_dev->vga_regions[QEMU_PCI_VGA_MEM] = mem; 985 memory_region_add_subregion_overlap(pci_dev->bus->address_space_mem, 986 QEMU_PCI_VGA_MEM_BASE, mem, 1); 987 988 assert(memory_region_size(io_lo) == QEMU_PCI_VGA_IO_LO_SIZE); 989 pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO] = io_lo; 990 memory_region_add_subregion_overlap(pci_dev->bus->address_space_io, 991 QEMU_PCI_VGA_IO_LO_BASE, io_lo, 1); 992 993 assert(memory_region_size(io_hi) == QEMU_PCI_VGA_IO_HI_SIZE); 994 pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI] = io_hi; 995 memory_region_add_subregion_overlap(pci_dev->bus->address_space_io, 996 QEMU_PCI_VGA_IO_HI_BASE, io_hi, 1); 997 pci_dev->has_vga = true; 998 999 pci_update_vga(pci_dev); 1000 } 1001 1002 void pci_unregister_vga(PCIDevice *pci_dev) 1003 { 1004 if (!pci_dev->has_vga) { 1005 return; 1006 } 1007 1008 memory_region_del_subregion(pci_dev->bus->address_space_mem, 1009 pci_dev->vga_regions[QEMU_PCI_VGA_MEM]); 1010 memory_region_del_subregion(pci_dev->bus->address_space_io, 1011 pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO]); 1012 memory_region_del_subregion(pci_dev->bus->address_space_io, 1013 pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI]); 1014 pci_dev->has_vga = false; 1015 } 1016 1017 pcibus_t pci_get_bar_addr(PCIDevice *pci_dev, int region_num) 1018 { 1019 return pci_dev->io_regions[region_num].addr; 1020 } 1021 1022 static pcibus_t pci_bar_address(PCIDevice *d, 1023 int reg, uint8_t type, pcibus_t size) 1024 { 1025 pcibus_t new_addr, last_addr; 1026 int bar = pci_bar(d, reg); 1027 uint16_t cmd = pci_get_word(d->config + PCI_COMMAND); 1028 1029 if (type & PCI_BASE_ADDRESS_SPACE_IO) { 1030 if (!(cmd & PCI_COMMAND_IO)) { 1031 return PCI_BAR_UNMAPPED; 1032 } 1033 new_addr = pci_get_long(d->config + bar) & ~(size - 1); 1034 last_addr = new_addr + size - 1; 1035 /* Check if 32 bit BAR wraps around explicitly. 1036 * TODO: make priorities correct and remove this work around. 1037 */ 1038 if (last_addr <= new_addr || new_addr == 0 || last_addr >= UINT32_MAX) { 1039 return PCI_BAR_UNMAPPED; 1040 } 1041 return new_addr; 1042 } 1043 1044 if (!(cmd & PCI_COMMAND_MEMORY)) { 1045 return PCI_BAR_UNMAPPED; 1046 } 1047 if (type & PCI_BASE_ADDRESS_MEM_TYPE_64) { 1048 new_addr = pci_get_quad(d->config + bar); 1049 } else { 1050 new_addr = pci_get_long(d->config + bar); 1051 } 1052 /* the ROM slot has a specific enable bit */ 1053 if (reg == PCI_ROM_SLOT && !(new_addr & PCI_ROM_ADDRESS_ENABLE)) { 1054 return PCI_BAR_UNMAPPED; 1055 } 1056 new_addr &= ~(size - 1); 1057 last_addr = new_addr + size - 1; 1058 /* NOTE: we do not support wrapping */ 1059 /* XXX: as we cannot support really dynamic 1060 mappings, we handle specific values as invalid 1061 mappings. */ 1062 if (last_addr <= new_addr || new_addr == 0 || 1063 last_addr == PCI_BAR_UNMAPPED) { 1064 return PCI_BAR_UNMAPPED; 1065 } 1066 1067 /* Now pcibus_t is 64bit. 1068 * Check if 32 bit BAR wraps around explicitly. 1069 * Without this, PC ide doesn't work well. 1070 * TODO: remove this work around. 1071 */ 1072 if (!(type & PCI_BASE_ADDRESS_MEM_TYPE_64) && last_addr >= UINT32_MAX) { 1073 return PCI_BAR_UNMAPPED; 1074 } 1075 1076 /* 1077 * OS is allowed to set BAR beyond its addressable 1078 * bits. For example, 32 bit OS can set 64bit bar 1079 * to >4G. Check it. TODO: we might need to support 1080 * it in the future for e.g. PAE. 1081 */ 1082 if (last_addr >= HWADDR_MAX) { 1083 return PCI_BAR_UNMAPPED; 1084 } 1085 1086 return new_addr; 1087 } 1088 1089 static void pci_update_mappings(PCIDevice *d) 1090 { 1091 PCIIORegion *r; 1092 int i; 1093 pcibus_t new_addr; 1094 1095 for(i = 0; i < PCI_NUM_REGIONS; i++) { 1096 r = &d->io_regions[i]; 1097 1098 /* this region isn't registered */ 1099 if (!r->size) 1100 continue; 1101 1102 new_addr = pci_bar_address(d, i, r->type, r->size); 1103 1104 /* This bar isn't changed */ 1105 if (new_addr == r->addr) 1106 continue; 1107 1108 /* now do the real mapping */ 1109 if (r->addr != PCI_BAR_UNMAPPED) { 1110 memory_region_del_subregion(r->address_space, r->memory); 1111 } 1112 r->addr = new_addr; 1113 if (r->addr != PCI_BAR_UNMAPPED) { 1114 memory_region_add_subregion_overlap(r->address_space, 1115 r->addr, r->memory, 1); 1116 } 1117 } 1118 1119 pci_update_vga(d); 1120 } 1121 1122 static inline int pci_irq_disabled(PCIDevice *d) 1123 { 1124 return pci_get_word(d->config + PCI_COMMAND) & PCI_COMMAND_INTX_DISABLE; 1125 } 1126 1127 /* Called after interrupt disabled field update in config space, 1128 * assert/deassert interrupts if necessary. 1129 * Gets original interrupt disable bit value (before update). */ 1130 static void pci_update_irq_disabled(PCIDevice *d, int was_irq_disabled) 1131 { 1132 int i, disabled = pci_irq_disabled(d); 1133 if (disabled == was_irq_disabled) 1134 return; 1135 for (i = 0; i < PCI_NUM_PINS; ++i) { 1136 int state = pci_irq_state(d, i); 1137 pci_change_irq_level(d, i, disabled ? -state : state); 1138 } 1139 } 1140 1141 uint32_t pci_default_read_config(PCIDevice *d, 1142 uint32_t address, int len) 1143 { 1144 uint32_t val = 0; 1145 1146 memcpy(&val, d->config + address, len); 1147 return le32_to_cpu(val); 1148 } 1149 1150 void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l) 1151 { 1152 int i, was_irq_disabled = pci_irq_disabled(d); 1153 1154 for (i = 0; i < l; val >>= 8, ++i) { 1155 uint8_t wmask = d->wmask[addr + i]; 1156 uint8_t w1cmask = d->w1cmask[addr + i]; 1157 assert(!(wmask & w1cmask)); 1158 d->config[addr + i] = (d->config[addr + i] & ~wmask) | (val & wmask); 1159 d->config[addr + i] &= ~(val & w1cmask); /* W1C: Write 1 to Clear */ 1160 } 1161 if (ranges_overlap(addr, l, PCI_BASE_ADDRESS_0, 24) || 1162 ranges_overlap(addr, l, PCI_ROM_ADDRESS, 4) || 1163 ranges_overlap(addr, l, PCI_ROM_ADDRESS1, 4) || 1164 range_covers_byte(addr, l, PCI_COMMAND)) 1165 pci_update_mappings(d); 1166 1167 if (range_covers_byte(addr, l, PCI_COMMAND)) { 1168 pci_update_irq_disabled(d, was_irq_disabled); 1169 memory_region_set_enabled(&d->bus_master_enable_region, 1170 pci_get_word(d->config + PCI_COMMAND) 1171 & PCI_COMMAND_MASTER); 1172 } 1173 1174 msi_write_config(d, addr, val, l); 1175 msix_write_config(d, addr, val, l); 1176 } 1177 1178 /***********************************************************/ 1179 /* generic PCI irq support */ 1180 1181 /* 0 <= irq_num <= 3. level must be 0 or 1 */ 1182 static void pci_irq_handler(void *opaque, int irq_num, int level) 1183 { 1184 PCIDevice *pci_dev = opaque; 1185 int change; 1186 1187 change = level - pci_irq_state(pci_dev, irq_num); 1188 if (!change) 1189 return; 1190 1191 pci_set_irq_state(pci_dev, irq_num, level); 1192 pci_update_irq_status(pci_dev); 1193 if (pci_irq_disabled(pci_dev)) 1194 return; 1195 pci_change_irq_level(pci_dev, irq_num, change); 1196 } 1197 1198 static inline int pci_intx(PCIDevice *pci_dev) 1199 { 1200 return pci_get_byte(pci_dev->config + PCI_INTERRUPT_PIN) - 1; 1201 } 1202 1203 qemu_irq pci_allocate_irq(PCIDevice *pci_dev) 1204 { 1205 int intx = pci_intx(pci_dev); 1206 1207 return qemu_allocate_irq(pci_irq_handler, pci_dev, intx); 1208 } 1209 1210 void pci_set_irq(PCIDevice *pci_dev, int level) 1211 { 1212 int intx = pci_intx(pci_dev); 1213 pci_irq_handler(pci_dev, intx, level); 1214 } 1215 1216 /* Special hooks used by device assignment */ 1217 void pci_bus_set_route_irq_fn(PCIBus *bus, pci_route_irq_fn route_intx_to_irq) 1218 { 1219 assert(pci_bus_is_root(bus)); 1220 bus->route_intx_to_irq = route_intx_to_irq; 1221 } 1222 1223 PCIINTxRoute pci_device_route_intx_to_irq(PCIDevice *dev, int pin) 1224 { 1225 PCIBus *bus; 1226 1227 do { 1228 bus = dev->bus; 1229 pin = bus->map_irq(dev, pin); 1230 dev = bus->parent_dev; 1231 } while (dev); 1232 1233 if (!bus->route_intx_to_irq) { 1234 error_report("PCI: Bug - unimplemented PCI INTx routing (%s)", 1235 object_get_typename(OBJECT(bus->qbus.parent))); 1236 return (PCIINTxRoute) { PCI_INTX_DISABLED, -1 }; 1237 } 1238 1239 return bus->route_intx_to_irq(bus->irq_opaque, pin); 1240 } 1241 1242 bool pci_intx_route_changed(PCIINTxRoute *old, PCIINTxRoute *new) 1243 { 1244 return old->mode != new->mode || old->irq != new->irq; 1245 } 1246 1247 void pci_bus_fire_intx_routing_notifier(PCIBus *bus) 1248 { 1249 PCIDevice *dev; 1250 PCIBus *sec; 1251 int i; 1252 1253 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { 1254 dev = bus->devices[i]; 1255 if (dev && dev->intx_routing_notifier) { 1256 dev->intx_routing_notifier(dev); 1257 } 1258 } 1259 1260 QLIST_FOREACH(sec, &bus->child, sibling) { 1261 pci_bus_fire_intx_routing_notifier(sec); 1262 } 1263 } 1264 1265 void pci_device_set_intx_routing_notifier(PCIDevice *dev, 1266 PCIINTxRoutingNotifier notifier) 1267 { 1268 dev->intx_routing_notifier = notifier; 1269 } 1270 1271 /* 1272 * PCI-to-PCI bridge specification 1273 * 9.1: Interrupt routing. Table 9-1 1274 * 1275 * the PCI Express Base Specification, Revision 2.1 1276 * 2.2.8.1: INTx interrutp signaling - Rules 1277 * the Implementation Note 1278 * Table 2-20 1279 */ 1280 /* 1281 * 0 <= pin <= 3 0 = INTA, 1 = INTB, 2 = INTC, 3 = INTD 1282 * 0-origin unlike PCI interrupt pin register. 1283 */ 1284 int pci_swizzle_map_irq_fn(PCIDevice *pci_dev, int pin) 1285 { 1286 return (pin + PCI_SLOT(pci_dev->devfn)) % PCI_NUM_PINS; 1287 } 1288 1289 /***********************************************************/ 1290 /* monitor info on PCI */ 1291 1292 typedef struct { 1293 uint16_t class; 1294 const char *desc; 1295 const char *fw_name; 1296 uint16_t fw_ign_bits; 1297 } pci_class_desc; 1298 1299 static const pci_class_desc pci_class_descriptions[] = 1300 { 1301 { 0x0001, "VGA controller", "display"}, 1302 { 0x0100, "SCSI controller", "scsi"}, 1303 { 0x0101, "IDE controller", "ide"}, 1304 { 0x0102, "Floppy controller", "fdc"}, 1305 { 0x0103, "IPI controller", "ipi"}, 1306 { 0x0104, "RAID controller", "raid"}, 1307 { 0x0106, "SATA controller"}, 1308 { 0x0107, "SAS controller"}, 1309 { 0x0180, "Storage controller"}, 1310 { 0x0200, "Ethernet controller", "ethernet"}, 1311 { 0x0201, "Token Ring controller", "token-ring"}, 1312 { 0x0202, "FDDI controller", "fddi"}, 1313 { 0x0203, "ATM controller", "atm"}, 1314 { 0x0280, "Network controller"}, 1315 { 0x0300, "VGA controller", "display", 0x00ff}, 1316 { 0x0301, "XGA controller"}, 1317 { 0x0302, "3D controller"}, 1318 { 0x0380, "Display controller"}, 1319 { 0x0400, "Video controller", "video"}, 1320 { 0x0401, "Audio controller", "sound"}, 1321 { 0x0402, "Phone"}, 1322 { 0x0403, "Audio controller", "sound"}, 1323 { 0x0480, "Multimedia controller"}, 1324 { 0x0500, "RAM controller", "memory"}, 1325 { 0x0501, "Flash controller", "flash"}, 1326 { 0x0580, "Memory controller"}, 1327 { 0x0600, "Host bridge", "host"}, 1328 { 0x0601, "ISA bridge", "isa"}, 1329 { 0x0602, "EISA bridge", "eisa"}, 1330 { 0x0603, "MC bridge", "mca"}, 1331 { 0x0604, "PCI bridge", "pci-bridge"}, 1332 { 0x0605, "PCMCIA bridge", "pcmcia"}, 1333 { 0x0606, "NUBUS bridge", "nubus"}, 1334 { 0x0607, "CARDBUS bridge", "cardbus"}, 1335 { 0x0608, "RACEWAY bridge"}, 1336 { 0x0680, "Bridge"}, 1337 { 0x0700, "Serial port", "serial"}, 1338 { 0x0701, "Parallel port", "parallel"}, 1339 { 0x0800, "Interrupt controller", "interrupt-controller"}, 1340 { 0x0801, "DMA controller", "dma-controller"}, 1341 { 0x0802, "Timer", "timer"}, 1342 { 0x0803, "RTC", "rtc"}, 1343 { 0x0900, "Keyboard", "keyboard"}, 1344 { 0x0901, "Pen", "pen"}, 1345 { 0x0902, "Mouse", "mouse"}, 1346 { 0x0A00, "Dock station", "dock", 0x00ff}, 1347 { 0x0B00, "i386 cpu", "cpu", 0x00ff}, 1348 { 0x0c00, "Fireware contorller", "fireware"}, 1349 { 0x0c01, "Access bus controller", "access-bus"}, 1350 { 0x0c02, "SSA controller", "ssa"}, 1351 { 0x0c03, "USB controller", "usb"}, 1352 { 0x0c04, "Fibre channel controller", "fibre-channel"}, 1353 { 0x0c05, "SMBus"}, 1354 { 0, NULL} 1355 }; 1356 1357 static void pci_for_each_device_under_bus(PCIBus *bus, 1358 void (*fn)(PCIBus *b, PCIDevice *d, 1359 void *opaque), 1360 void *opaque) 1361 { 1362 PCIDevice *d; 1363 int devfn; 1364 1365 for(devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { 1366 d = bus->devices[devfn]; 1367 if (d) { 1368 fn(bus, d, opaque); 1369 } 1370 } 1371 } 1372 1373 void pci_for_each_device(PCIBus *bus, int bus_num, 1374 void (*fn)(PCIBus *b, PCIDevice *d, void *opaque), 1375 void *opaque) 1376 { 1377 bus = pci_find_bus_nr(bus, bus_num); 1378 1379 if (bus) { 1380 pci_for_each_device_under_bus(bus, fn, opaque); 1381 } 1382 } 1383 1384 static const pci_class_desc *get_class_desc(int class) 1385 { 1386 const pci_class_desc *desc; 1387 1388 desc = pci_class_descriptions; 1389 while (desc->desc && class != desc->class) { 1390 desc++; 1391 } 1392 1393 return desc; 1394 } 1395 1396 static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num); 1397 1398 static PciMemoryRegionList *qmp_query_pci_regions(const PCIDevice *dev) 1399 { 1400 PciMemoryRegionList *head = NULL, *cur_item = NULL; 1401 int i; 1402 1403 for (i = 0; i < PCI_NUM_REGIONS; i++) { 1404 const PCIIORegion *r = &dev->io_regions[i]; 1405 PciMemoryRegionList *region; 1406 1407 if (!r->size) { 1408 continue; 1409 } 1410 1411 region = g_malloc0(sizeof(*region)); 1412 region->value = g_malloc0(sizeof(*region->value)); 1413 1414 if (r->type & PCI_BASE_ADDRESS_SPACE_IO) { 1415 region->value->type = g_strdup("io"); 1416 } else { 1417 region->value->type = g_strdup("memory"); 1418 region->value->has_prefetch = true; 1419 region->value->prefetch = !!(r->type & PCI_BASE_ADDRESS_MEM_PREFETCH); 1420 region->value->has_mem_type_64 = true; 1421 region->value->mem_type_64 = !!(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64); 1422 } 1423 1424 region->value->bar = i; 1425 region->value->address = r->addr; 1426 region->value->size = r->size; 1427 1428 /* XXX: waiting for the qapi to support GSList */ 1429 if (!cur_item) { 1430 head = cur_item = region; 1431 } else { 1432 cur_item->next = region; 1433 cur_item = region; 1434 } 1435 } 1436 1437 return head; 1438 } 1439 1440 static PciBridgeInfo *qmp_query_pci_bridge(PCIDevice *dev, PCIBus *bus, 1441 int bus_num) 1442 { 1443 PciBridgeInfo *info; 1444 1445 info = g_malloc0(sizeof(*info)); 1446 1447 info->bus.number = dev->config[PCI_PRIMARY_BUS]; 1448 info->bus.secondary = dev->config[PCI_SECONDARY_BUS]; 1449 info->bus.subordinate = dev->config[PCI_SUBORDINATE_BUS]; 1450 1451 info->bus.io_range = g_malloc0(sizeof(*info->bus.io_range)); 1452 info->bus.io_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_IO); 1453 info->bus.io_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_IO); 1454 1455 info->bus.memory_range = g_malloc0(sizeof(*info->bus.memory_range)); 1456 info->bus.memory_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_MEMORY); 1457 info->bus.memory_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_MEMORY); 1458 1459 info->bus.prefetchable_range = g_malloc0(sizeof(*info->bus.prefetchable_range)); 1460 info->bus.prefetchable_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH); 1461 info->bus.prefetchable_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH); 1462 1463 if (dev->config[PCI_SECONDARY_BUS] != 0) { 1464 PCIBus *child_bus = pci_find_bus_nr(bus, dev->config[PCI_SECONDARY_BUS]); 1465 if (child_bus) { 1466 info->has_devices = true; 1467 info->devices = qmp_query_pci_devices(child_bus, dev->config[PCI_SECONDARY_BUS]); 1468 } 1469 } 1470 1471 return info; 1472 } 1473 1474 static PciDeviceInfo *qmp_query_pci_device(PCIDevice *dev, PCIBus *bus, 1475 int bus_num) 1476 { 1477 const pci_class_desc *desc; 1478 PciDeviceInfo *info; 1479 uint8_t type; 1480 int class; 1481 1482 info = g_malloc0(sizeof(*info)); 1483 info->bus = bus_num; 1484 info->slot = PCI_SLOT(dev->devfn); 1485 info->function = PCI_FUNC(dev->devfn); 1486 1487 class = pci_get_word(dev->config + PCI_CLASS_DEVICE); 1488 info->class_info.q_class = class; 1489 desc = get_class_desc(class); 1490 if (desc->desc) { 1491 info->class_info.has_desc = true; 1492 info->class_info.desc = g_strdup(desc->desc); 1493 } 1494 1495 info->id.vendor = pci_get_word(dev->config + PCI_VENDOR_ID); 1496 info->id.device = pci_get_word(dev->config + PCI_DEVICE_ID); 1497 info->regions = qmp_query_pci_regions(dev); 1498 info->qdev_id = g_strdup(dev->qdev.id ? dev->qdev.id : ""); 1499 1500 if (dev->config[PCI_INTERRUPT_PIN] != 0) { 1501 info->has_irq = true; 1502 info->irq = dev->config[PCI_INTERRUPT_LINE]; 1503 } 1504 1505 type = dev->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION; 1506 if (type == PCI_HEADER_TYPE_BRIDGE) { 1507 info->has_pci_bridge = true; 1508 info->pci_bridge = qmp_query_pci_bridge(dev, bus, bus_num); 1509 } 1510 1511 return info; 1512 } 1513 1514 static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num) 1515 { 1516 PciDeviceInfoList *info, *head = NULL, *cur_item = NULL; 1517 PCIDevice *dev; 1518 int devfn; 1519 1520 for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { 1521 dev = bus->devices[devfn]; 1522 if (dev) { 1523 info = g_malloc0(sizeof(*info)); 1524 info->value = qmp_query_pci_device(dev, bus, bus_num); 1525 1526 /* XXX: waiting for the qapi to support GSList */ 1527 if (!cur_item) { 1528 head = cur_item = info; 1529 } else { 1530 cur_item->next = info; 1531 cur_item = info; 1532 } 1533 } 1534 } 1535 1536 return head; 1537 } 1538 1539 static PciInfo *qmp_query_pci_bus(PCIBus *bus, int bus_num) 1540 { 1541 PciInfo *info = NULL; 1542 1543 bus = pci_find_bus_nr(bus, bus_num); 1544 if (bus) { 1545 info = g_malloc0(sizeof(*info)); 1546 info->bus = bus_num; 1547 info->devices = qmp_query_pci_devices(bus, bus_num); 1548 } 1549 1550 return info; 1551 } 1552 1553 PciInfoList *qmp_query_pci(Error **errp) 1554 { 1555 PciInfoList *info, *head = NULL, *cur_item = NULL; 1556 PCIHostState *host_bridge; 1557 1558 QLIST_FOREACH(host_bridge, &pci_host_bridges, next) { 1559 info = g_malloc0(sizeof(*info)); 1560 info->value = qmp_query_pci_bus(host_bridge->bus, 0); 1561 1562 /* XXX: waiting for the qapi to support GSList */ 1563 if (!cur_item) { 1564 head = cur_item = info; 1565 } else { 1566 cur_item->next = info; 1567 cur_item = info; 1568 } 1569 } 1570 1571 return head; 1572 } 1573 1574 static const char * const pci_nic_models[] = { 1575 "ne2k_pci", 1576 "i82551", 1577 "i82557b", 1578 "i82559er", 1579 "rtl8139", 1580 "e1000", 1581 "pcnet", 1582 "virtio", 1583 NULL 1584 }; 1585 1586 static const char * const pci_nic_names[] = { 1587 "ne2k_pci", 1588 "i82551", 1589 "i82557b", 1590 "i82559er", 1591 "rtl8139", 1592 "e1000", 1593 "pcnet", 1594 "virtio-net-pci", 1595 NULL 1596 }; 1597 1598 /* Initialize a PCI NIC. */ 1599 /* FIXME callers should check for failure, but don't */ 1600 PCIDevice *pci_nic_init(NICInfo *nd, PCIBus *rootbus, 1601 const char *default_model, 1602 const char *default_devaddr) 1603 { 1604 const char *devaddr = nd->devaddr ? nd->devaddr : default_devaddr; 1605 PCIBus *bus; 1606 int devfn; 1607 PCIDevice *pci_dev; 1608 DeviceState *dev; 1609 int i; 1610 1611 i = qemu_find_nic_model(nd, pci_nic_models, default_model); 1612 if (i < 0) 1613 return NULL; 1614 1615 bus = pci_get_bus_devfn(&devfn, rootbus, devaddr); 1616 if (!bus) { 1617 error_report("Invalid PCI device address %s for device %s", 1618 devaddr, pci_nic_names[i]); 1619 return NULL; 1620 } 1621 1622 pci_dev = pci_create(bus, devfn, pci_nic_names[i]); 1623 dev = &pci_dev->qdev; 1624 qdev_set_nic_properties(dev, nd); 1625 if (qdev_init(dev) < 0) 1626 return NULL; 1627 return pci_dev; 1628 } 1629 1630 PCIDevice *pci_nic_init_nofail(NICInfo *nd, PCIBus *rootbus, 1631 const char *default_model, 1632 const char *default_devaddr) 1633 { 1634 PCIDevice *res; 1635 1636 if (qemu_show_nic_models(nd->model, pci_nic_models)) 1637 exit(0); 1638 1639 res = pci_nic_init(nd, rootbus, default_model, default_devaddr); 1640 if (!res) 1641 exit(1); 1642 return res; 1643 } 1644 1645 PCIDevice *pci_vga_init(PCIBus *bus) 1646 { 1647 switch (vga_interface_type) { 1648 case VGA_CIRRUS: 1649 return pci_create_simple(bus, -1, "cirrus-vga"); 1650 case VGA_QXL: 1651 return pci_create_simple(bus, -1, "qxl-vga"); 1652 case VGA_STD: 1653 return pci_create_simple(bus, -1, "VGA"); 1654 case VGA_VMWARE: 1655 return pci_create_simple(bus, -1, "vmware-svga"); 1656 case VGA_NONE: 1657 default: /* Other non-PCI types. Checking for unsupported types is already 1658 done in vl.c. */ 1659 return NULL; 1660 } 1661 } 1662 1663 /* Whether a given bus number is in range of the secondary 1664 * bus of the given bridge device. */ 1665 static bool pci_secondary_bus_in_range(PCIDevice *dev, int bus_num) 1666 { 1667 return !(pci_get_word(dev->config + PCI_BRIDGE_CONTROL) & 1668 PCI_BRIDGE_CTL_BUS_RESET) /* Don't walk the bus if it's reset. */ && 1669 dev->config[PCI_SECONDARY_BUS] < bus_num && 1670 bus_num <= dev->config[PCI_SUBORDINATE_BUS]; 1671 } 1672 1673 static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num) 1674 { 1675 PCIBus *sec; 1676 1677 if (!bus) { 1678 return NULL; 1679 } 1680 1681 if (pci_bus_num(bus) == bus_num) { 1682 return bus; 1683 } 1684 1685 /* Consider all bus numbers in range for the host pci bridge. */ 1686 if (!pci_bus_is_root(bus) && 1687 !pci_secondary_bus_in_range(bus->parent_dev, bus_num)) { 1688 return NULL; 1689 } 1690 1691 /* try child bus */ 1692 for (; bus; bus = sec) { 1693 QLIST_FOREACH(sec, &bus->child, sibling) { 1694 assert(!pci_bus_is_root(sec)); 1695 if (sec->parent_dev->config[PCI_SECONDARY_BUS] == bus_num) { 1696 return sec; 1697 } 1698 if (pci_secondary_bus_in_range(sec->parent_dev, bus_num)) { 1699 break; 1700 } 1701 } 1702 } 1703 1704 return NULL; 1705 } 1706 1707 void pci_for_each_bus_depth_first(PCIBus *bus, 1708 void *(*begin)(PCIBus *bus, void *parent_state), 1709 void (*end)(PCIBus *bus, void *state), 1710 void *parent_state) 1711 { 1712 PCIBus *sec; 1713 void *state; 1714 1715 if (!bus) { 1716 return; 1717 } 1718 1719 if (begin) { 1720 state = begin(bus, parent_state); 1721 } else { 1722 state = parent_state; 1723 } 1724 1725 QLIST_FOREACH(sec, &bus->child, sibling) { 1726 pci_for_each_bus_depth_first(sec, begin, end, state); 1727 } 1728 1729 if (end) { 1730 end(bus, state); 1731 } 1732 } 1733 1734 1735 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn) 1736 { 1737 bus = pci_find_bus_nr(bus, bus_num); 1738 1739 if (!bus) 1740 return NULL; 1741 1742 return bus->devices[devfn]; 1743 } 1744 1745 static int pci_qdev_init(DeviceState *qdev) 1746 { 1747 PCIDevice *pci_dev = (PCIDevice *)qdev; 1748 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev); 1749 PCIBus *bus; 1750 int rc; 1751 bool is_default_rom; 1752 1753 /* initialize cap_present for pci_is_express() and pci_config_size() */ 1754 if (pc->is_express) { 1755 pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS; 1756 } 1757 1758 bus = PCI_BUS(qdev_get_parent_bus(qdev)); 1759 pci_dev = do_pci_register_device(pci_dev, bus, 1760 object_get_typename(OBJECT(qdev)), 1761 pci_dev->devfn); 1762 if (pci_dev == NULL) 1763 return -1; 1764 1765 if (pc->init) { 1766 rc = pc->init(pci_dev); 1767 if (rc != 0) { 1768 do_pci_unregister_device(pci_dev); 1769 return rc; 1770 } 1771 } 1772 1773 /* rom loading */ 1774 is_default_rom = false; 1775 if (pci_dev->romfile == NULL && pc->romfile != NULL) { 1776 pci_dev->romfile = g_strdup(pc->romfile); 1777 is_default_rom = true; 1778 } 1779 pci_add_option_rom(pci_dev, is_default_rom); 1780 1781 return 0; 1782 } 1783 1784 PCIDevice *pci_create_multifunction(PCIBus *bus, int devfn, bool multifunction, 1785 const char *name) 1786 { 1787 DeviceState *dev; 1788 1789 dev = qdev_create(&bus->qbus, name); 1790 qdev_prop_set_int32(dev, "addr", devfn); 1791 qdev_prop_set_bit(dev, "multifunction", multifunction); 1792 return PCI_DEVICE(dev); 1793 } 1794 1795 PCIDevice *pci_create_simple_multifunction(PCIBus *bus, int devfn, 1796 bool multifunction, 1797 const char *name) 1798 { 1799 PCIDevice *dev = pci_create_multifunction(bus, devfn, multifunction, name); 1800 qdev_init_nofail(&dev->qdev); 1801 return dev; 1802 } 1803 1804 PCIDevice *pci_create(PCIBus *bus, int devfn, const char *name) 1805 { 1806 return pci_create_multifunction(bus, devfn, false, name); 1807 } 1808 1809 PCIDevice *pci_create_simple(PCIBus *bus, int devfn, const char *name) 1810 { 1811 return pci_create_simple_multifunction(bus, devfn, false, name); 1812 } 1813 1814 static uint8_t pci_find_space(PCIDevice *pdev, uint8_t size) 1815 { 1816 int offset = PCI_CONFIG_HEADER_SIZE; 1817 int i; 1818 for (i = PCI_CONFIG_HEADER_SIZE; i < PCI_CONFIG_SPACE_SIZE; ++i) { 1819 if (pdev->used[i]) 1820 offset = i + 1; 1821 else if (i - offset + 1 == size) 1822 return offset; 1823 } 1824 return 0; 1825 } 1826 1827 static uint8_t pci_find_capability_list(PCIDevice *pdev, uint8_t cap_id, 1828 uint8_t *prev_p) 1829 { 1830 uint8_t next, prev; 1831 1832 if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST)) 1833 return 0; 1834 1835 for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]); 1836 prev = next + PCI_CAP_LIST_NEXT) 1837 if (pdev->config[next + PCI_CAP_LIST_ID] == cap_id) 1838 break; 1839 1840 if (prev_p) 1841 *prev_p = prev; 1842 return next; 1843 } 1844 1845 static uint8_t pci_find_capability_at_offset(PCIDevice *pdev, uint8_t offset) 1846 { 1847 uint8_t next, prev, found = 0; 1848 1849 if (!(pdev->used[offset])) { 1850 return 0; 1851 } 1852 1853 assert(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST); 1854 1855 for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]); 1856 prev = next + PCI_CAP_LIST_NEXT) { 1857 if (next <= offset && next > found) { 1858 found = next; 1859 } 1860 } 1861 return found; 1862 } 1863 1864 /* Patch the PCI vendor and device ids in a PCI rom image if necessary. 1865 This is needed for an option rom which is used for more than one device. */ 1866 static void pci_patch_ids(PCIDevice *pdev, uint8_t *ptr, int size) 1867 { 1868 uint16_t vendor_id; 1869 uint16_t device_id; 1870 uint16_t rom_vendor_id; 1871 uint16_t rom_device_id; 1872 uint16_t rom_magic; 1873 uint16_t pcir_offset; 1874 uint8_t checksum; 1875 1876 /* Words in rom data are little endian (like in PCI configuration), 1877 so they can be read / written with pci_get_word / pci_set_word. */ 1878 1879 /* Only a valid rom will be patched. */ 1880 rom_magic = pci_get_word(ptr); 1881 if (rom_magic != 0xaa55) { 1882 PCI_DPRINTF("Bad ROM magic %04x\n", rom_magic); 1883 return; 1884 } 1885 pcir_offset = pci_get_word(ptr + 0x18); 1886 if (pcir_offset + 8 >= size || memcmp(ptr + pcir_offset, "PCIR", 4)) { 1887 PCI_DPRINTF("Bad PCIR offset 0x%x or signature\n", pcir_offset); 1888 return; 1889 } 1890 1891 vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID); 1892 device_id = pci_get_word(pdev->config + PCI_DEVICE_ID); 1893 rom_vendor_id = pci_get_word(ptr + pcir_offset + 4); 1894 rom_device_id = pci_get_word(ptr + pcir_offset + 6); 1895 1896 PCI_DPRINTF("%s: ROM id %04x%04x / PCI id %04x%04x\n", pdev->romfile, 1897 vendor_id, device_id, rom_vendor_id, rom_device_id); 1898 1899 checksum = ptr[6]; 1900 1901 if (vendor_id != rom_vendor_id) { 1902 /* Patch vendor id and checksum (at offset 6 for etherboot roms). */ 1903 checksum += (uint8_t)rom_vendor_id + (uint8_t)(rom_vendor_id >> 8); 1904 checksum -= (uint8_t)vendor_id + (uint8_t)(vendor_id >> 8); 1905 PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum); 1906 ptr[6] = checksum; 1907 pci_set_word(ptr + pcir_offset + 4, vendor_id); 1908 } 1909 1910 if (device_id != rom_device_id) { 1911 /* Patch device id and checksum (at offset 6 for etherboot roms). */ 1912 checksum += (uint8_t)rom_device_id + (uint8_t)(rom_device_id >> 8); 1913 checksum -= (uint8_t)device_id + (uint8_t)(device_id >> 8); 1914 PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum); 1915 ptr[6] = checksum; 1916 pci_set_word(ptr + pcir_offset + 6, device_id); 1917 } 1918 } 1919 1920 /* Add an option rom for the device */ 1921 static int pci_add_option_rom(PCIDevice *pdev, bool is_default_rom) 1922 { 1923 int size; 1924 char *path; 1925 void *ptr; 1926 char name[32]; 1927 const VMStateDescription *vmsd; 1928 1929 if (!pdev->romfile) 1930 return 0; 1931 if (strlen(pdev->romfile) == 0) 1932 return 0; 1933 1934 if (!pdev->rom_bar) { 1935 /* 1936 * Load rom via fw_cfg instead of creating a rom bar, 1937 * for 0.11 compatibility. 1938 */ 1939 int class = pci_get_word(pdev->config + PCI_CLASS_DEVICE); 1940 if (class == 0x0300) { 1941 rom_add_vga(pdev->romfile); 1942 } else { 1943 rom_add_option(pdev->romfile, -1); 1944 } 1945 return 0; 1946 } 1947 1948 path = qemu_find_file(QEMU_FILE_TYPE_BIOS, pdev->romfile); 1949 if (path == NULL) { 1950 path = g_strdup(pdev->romfile); 1951 } 1952 1953 size = get_image_size(path); 1954 if (size < 0) { 1955 error_report("%s: failed to find romfile \"%s\"", 1956 __func__, pdev->romfile); 1957 g_free(path); 1958 return -1; 1959 } else if (size == 0) { 1960 error_report("%s: ignoring empty romfile \"%s\"", 1961 __func__, pdev->romfile); 1962 g_free(path); 1963 return -1; 1964 } 1965 if (size & (size - 1)) { 1966 size = 1 << qemu_fls(size); 1967 } 1968 1969 vmsd = qdev_get_vmsd(DEVICE(pdev)); 1970 1971 if (vmsd) { 1972 snprintf(name, sizeof(name), "%s.rom", vmsd->name); 1973 } else { 1974 snprintf(name, sizeof(name), "%s.rom", object_get_typename(OBJECT(pdev))); 1975 } 1976 pdev->has_rom = true; 1977 memory_region_init_ram(&pdev->rom, OBJECT(pdev), name, size); 1978 vmstate_register_ram(&pdev->rom, &pdev->qdev); 1979 ptr = memory_region_get_ram_ptr(&pdev->rom); 1980 load_image(path, ptr); 1981 g_free(path); 1982 1983 if (is_default_rom) { 1984 /* Only the default rom images will be patched (if needed). */ 1985 pci_patch_ids(pdev, ptr, size); 1986 } 1987 1988 pci_register_bar(pdev, PCI_ROM_SLOT, 0, &pdev->rom); 1989 1990 return 0; 1991 } 1992 1993 static void pci_del_option_rom(PCIDevice *pdev) 1994 { 1995 if (!pdev->has_rom) 1996 return; 1997 1998 vmstate_unregister_ram(&pdev->rom, &pdev->qdev); 1999 memory_region_destroy(&pdev->rom); 2000 pdev->has_rom = false; 2001 } 2002 2003 /* 2004 * if !offset 2005 * Reserve space and add capability to the linked list in pci config space 2006 * 2007 * if offset = 0, 2008 * Find and reserve space and add capability to the linked list 2009 * in pci config space */ 2010 int pci_add_capability(PCIDevice *pdev, uint8_t cap_id, 2011 uint8_t offset, uint8_t size) 2012 { 2013 int ret; 2014 Error *local_err = NULL; 2015 2016 ret = pci_add_capability2(pdev, cap_id, offset, size, &local_err); 2017 if (local_err) { 2018 assert(ret < 0); 2019 error_report("%s", error_get_pretty(local_err)); 2020 error_free(local_err); 2021 } else { 2022 /* success implies a positive offset in config space */ 2023 assert(ret > 0); 2024 } 2025 return ret; 2026 } 2027 2028 int pci_add_capability2(PCIDevice *pdev, uint8_t cap_id, 2029 uint8_t offset, uint8_t size, 2030 Error **errp) 2031 { 2032 uint8_t *config; 2033 int i, overlapping_cap; 2034 2035 if (!offset) { 2036 offset = pci_find_space(pdev, size); 2037 if (!offset) { 2038 error_setg(errp, "out of PCI config space"); 2039 return -ENOSPC; 2040 } 2041 } else { 2042 /* Verify that capabilities don't overlap. Note: device assignment 2043 * depends on this check to verify that the device is not broken. 2044 * Should never trigger for emulated devices, but it's helpful 2045 * for debugging these. */ 2046 for (i = offset; i < offset + size; i++) { 2047 overlapping_cap = pci_find_capability_at_offset(pdev, i); 2048 if (overlapping_cap) { 2049 error_setg(errp, "%s:%02x:%02x.%x " 2050 "Attempt to add PCI capability %x at offset " 2051 "%x overlaps existing capability %x at offset %x", 2052 pci_root_bus_path(pdev), pci_bus_num(pdev->bus), 2053 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), 2054 cap_id, offset, overlapping_cap, i); 2055 return -EINVAL; 2056 } 2057 } 2058 } 2059 2060 config = pdev->config + offset; 2061 config[PCI_CAP_LIST_ID] = cap_id; 2062 config[PCI_CAP_LIST_NEXT] = pdev->config[PCI_CAPABILITY_LIST]; 2063 pdev->config[PCI_CAPABILITY_LIST] = offset; 2064 pdev->config[PCI_STATUS] |= PCI_STATUS_CAP_LIST; 2065 memset(pdev->used + offset, 0xFF, QEMU_ALIGN_UP(size, 4)); 2066 /* Make capability read-only by default */ 2067 memset(pdev->wmask + offset, 0, size); 2068 /* Check capability by default */ 2069 memset(pdev->cmask + offset, 0xFF, size); 2070 return offset; 2071 } 2072 2073 /* Unlink capability from the pci config space. */ 2074 void pci_del_capability(PCIDevice *pdev, uint8_t cap_id, uint8_t size) 2075 { 2076 uint8_t prev, offset = pci_find_capability_list(pdev, cap_id, &prev); 2077 if (!offset) 2078 return; 2079 pdev->config[prev] = pdev->config[offset + PCI_CAP_LIST_NEXT]; 2080 /* Make capability writable again */ 2081 memset(pdev->wmask + offset, 0xff, size); 2082 memset(pdev->w1cmask + offset, 0, size); 2083 /* Clear cmask as device-specific registers can't be checked */ 2084 memset(pdev->cmask + offset, 0, size); 2085 memset(pdev->used + offset, 0, QEMU_ALIGN_UP(size, 4)); 2086 2087 if (!pdev->config[PCI_CAPABILITY_LIST]) 2088 pdev->config[PCI_STATUS] &= ~PCI_STATUS_CAP_LIST; 2089 } 2090 2091 uint8_t pci_find_capability(PCIDevice *pdev, uint8_t cap_id) 2092 { 2093 return pci_find_capability_list(pdev, cap_id, NULL); 2094 } 2095 2096 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent) 2097 { 2098 PCIDevice *d = (PCIDevice *)dev; 2099 const pci_class_desc *desc; 2100 char ctxt[64]; 2101 PCIIORegion *r; 2102 int i, class; 2103 2104 class = pci_get_word(d->config + PCI_CLASS_DEVICE); 2105 desc = pci_class_descriptions; 2106 while (desc->desc && class != desc->class) 2107 desc++; 2108 if (desc->desc) { 2109 snprintf(ctxt, sizeof(ctxt), "%s", desc->desc); 2110 } else { 2111 snprintf(ctxt, sizeof(ctxt), "Class %04x", class); 2112 } 2113 2114 monitor_printf(mon, "%*sclass %s, addr %02x:%02x.%x, " 2115 "pci id %04x:%04x (sub %04x:%04x)\n", 2116 indent, "", ctxt, pci_bus_num(d->bus), 2117 PCI_SLOT(d->devfn), PCI_FUNC(d->devfn), 2118 pci_get_word(d->config + PCI_VENDOR_ID), 2119 pci_get_word(d->config + PCI_DEVICE_ID), 2120 pci_get_word(d->config + PCI_SUBSYSTEM_VENDOR_ID), 2121 pci_get_word(d->config + PCI_SUBSYSTEM_ID)); 2122 for (i = 0; i < PCI_NUM_REGIONS; i++) { 2123 r = &d->io_regions[i]; 2124 if (!r->size) 2125 continue; 2126 monitor_printf(mon, "%*sbar %d: %s at 0x%"FMT_PCIBUS 2127 " [0x%"FMT_PCIBUS"]\n", 2128 indent, "", 2129 i, r->type & PCI_BASE_ADDRESS_SPACE_IO ? "i/o" : "mem", 2130 r->addr, r->addr + r->size - 1); 2131 } 2132 } 2133 2134 static char *pci_dev_fw_name(DeviceState *dev, char *buf, int len) 2135 { 2136 PCIDevice *d = (PCIDevice *)dev; 2137 const char *name = NULL; 2138 const pci_class_desc *desc = pci_class_descriptions; 2139 int class = pci_get_word(d->config + PCI_CLASS_DEVICE); 2140 2141 while (desc->desc && 2142 (class & ~desc->fw_ign_bits) != 2143 (desc->class & ~desc->fw_ign_bits)) { 2144 desc++; 2145 } 2146 2147 if (desc->desc) { 2148 name = desc->fw_name; 2149 } 2150 2151 if (name) { 2152 pstrcpy(buf, len, name); 2153 } else { 2154 snprintf(buf, len, "pci%04x,%04x", 2155 pci_get_word(d->config + PCI_VENDOR_ID), 2156 pci_get_word(d->config + PCI_DEVICE_ID)); 2157 } 2158 2159 return buf; 2160 } 2161 2162 static char *pcibus_get_fw_dev_path(DeviceState *dev) 2163 { 2164 PCIDevice *d = (PCIDevice *)dev; 2165 char path[50], name[33]; 2166 int off; 2167 2168 off = snprintf(path, sizeof(path), "%s@%x", 2169 pci_dev_fw_name(dev, name, sizeof name), 2170 PCI_SLOT(d->devfn)); 2171 if (PCI_FUNC(d->devfn)) 2172 snprintf(path + off, sizeof(path) + off, ",%x", PCI_FUNC(d->devfn)); 2173 return g_strdup(path); 2174 } 2175 2176 static char *pcibus_get_dev_path(DeviceState *dev) 2177 { 2178 PCIDevice *d = container_of(dev, PCIDevice, qdev); 2179 PCIDevice *t; 2180 int slot_depth; 2181 /* Path format: Domain:00:Slot.Function:Slot.Function....:Slot.Function. 2182 * 00 is added here to make this format compatible with 2183 * domain:Bus:Slot.Func for systems without nested PCI bridges. 2184 * Slot.Function list specifies the slot and function numbers for all 2185 * devices on the path from root to the specific device. */ 2186 const char *root_bus_path; 2187 int root_bus_len; 2188 char slot[] = ":SS.F"; 2189 int slot_len = sizeof slot - 1 /* For '\0' */; 2190 int path_len; 2191 char *path, *p; 2192 int s; 2193 2194 root_bus_path = pci_root_bus_path(d); 2195 root_bus_len = strlen(root_bus_path); 2196 2197 /* Calculate # of slots on path between device and root. */; 2198 slot_depth = 0; 2199 for (t = d; t; t = t->bus->parent_dev) { 2200 ++slot_depth; 2201 } 2202 2203 path_len = root_bus_len + slot_len * slot_depth; 2204 2205 /* Allocate memory, fill in the terminating null byte. */ 2206 path = g_malloc(path_len + 1 /* For '\0' */); 2207 path[path_len] = '\0'; 2208 2209 memcpy(path, root_bus_path, root_bus_len); 2210 2211 /* Fill in slot numbers. We walk up from device to root, so need to print 2212 * them in the reverse order, last to first. */ 2213 p = path + path_len; 2214 for (t = d; t; t = t->bus->parent_dev) { 2215 p -= slot_len; 2216 s = snprintf(slot, sizeof slot, ":%02x.%x", 2217 PCI_SLOT(t->devfn), PCI_FUNC(t->devfn)); 2218 assert(s == slot_len); 2219 memcpy(p, slot, slot_len); 2220 } 2221 2222 return path; 2223 } 2224 2225 static int pci_qdev_find_recursive(PCIBus *bus, 2226 const char *id, PCIDevice **pdev) 2227 { 2228 DeviceState *qdev = qdev_find_recursive(&bus->qbus, id); 2229 if (!qdev) { 2230 return -ENODEV; 2231 } 2232 2233 /* roughly check if given qdev is pci device */ 2234 if (object_dynamic_cast(OBJECT(qdev), TYPE_PCI_DEVICE)) { 2235 *pdev = PCI_DEVICE(qdev); 2236 return 0; 2237 } 2238 return -EINVAL; 2239 } 2240 2241 int pci_qdev_find_device(const char *id, PCIDevice **pdev) 2242 { 2243 PCIHostState *host_bridge; 2244 int rc = -ENODEV; 2245 2246 QLIST_FOREACH(host_bridge, &pci_host_bridges, next) { 2247 int tmp = pci_qdev_find_recursive(host_bridge->bus, id, pdev); 2248 if (!tmp) { 2249 rc = 0; 2250 break; 2251 } 2252 if (tmp != -ENODEV) { 2253 rc = tmp; 2254 } 2255 } 2256 2257 return rc; 2258 } 2259 2260 MemoryRegion *pci_address_space(PCIDevice *dev) 2261 { 2262 return dev->bus->address_space_mem; 2263 } 2264 2265 MemoryRegion *pci_address_space_io(PCIDevice *dev) 2266 { 2267 return dev->bus->address_space_io; 2268 } 2269 2270 static void pci_device_class_init(ObjectClass *klass, void *data) 2271 { 2272 DeviceClass *k = DEVICE_CLASS(klass); 2273 k->init = pci_qdev_init; 2274 k->exit = pci_unregister_device; 2275 k->bus_type = TYPE_PCI_BUS; 2276 k->props = pci_props; 2277 } 2278 2279 AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) 2280 { 2281 PCIBus *bus = PCI_BUS(dev->bus); 2282 2283 if (bus->iommu_fn) { 2284 return bus->iommu_fn(bus, bus->iommu_opaque, dev->devfn); 2285 } 2286 2287 if (bus->parent_dev) { 2288 /** We are ignoring the bus master DMA bit of the bridge 2289 * as it would complicate things such as VFIO for no good reason */ 2290 return pci_device_iommu_address_space(bus->parent_dev); 2291 } 2292 2293 return &address_space_memory; 2294 } 2295 2296 void pci_setup_iommu(PCIBus *bus, PCIIOMMUFunc fn, void *opaque) 2297 { 2298 bus->iommu_fn = fn; 2299 bus->iommu_opaque = opaque; 2300 } 2301 2302 static void pci_dev_get_w64(PCIBus *b, PCIDevice *dev, void *opaque) 2303 { 2304 Range *range = opaque; 2305 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev); 2306 uint16_t cmd = pci_get_word(dev->config + PCI_COMMAND); 2307 int i; 2308 2309 if (!(cmd & PCI_COMMAND_MEMORY)) { 2310 return; 2311 } 2312 2313 if (pc->is_bridge) { 2314 pcibus_t base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH); 2315 pcibus_t limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH); 2316 2317 base = MAX(base, 0x1ULL << 32); 2318 2319 if (limit >= base) { 2320 Range pref_range; 2321 pref_range.begin = base; 2322 pref_range.end = limit + 1; 2323 range_extend(range, &pref_range); 2324 } 2325 } 2326 for (i = 0; i < PCI_NUM_REGIONS; ++i) { 2327 PCIIORegion *r = &dev->io_regions[i]; 2328 Range region_range; 2329 2330 if (!r->size || 2331 (r->type & PCI_BASE_ADDRESS_SPACE_IO) || 2332 !(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64)) { 2333 continue; 2334 } 2335 region_range.begin = pci_bar_address(dev, i, r->type, r->size); 2336 region_range.end = region_range.begin + r->size; 2337 2338 if (region_range.begin == PCI_BAR_UNMAPPED) { 2339 continue; 2340 } 2341 2342 region_range.begin = MAX(region_range.begin, 0x1ULL << 32); 2343 2344 if (region_range.end - 1 >= region_range.begin) { 2345 range_extend(range, ®ion_range); 2346 } 2347 } 2348 } 2349 2350 void pci_bus_get_w64_range(PCIBus *bus, Range *range) 2351 { 2352 range->begin = range->end = 0; 2353 pci_for_each_device_under_bus(bus, pci_dev_get_w64, range); 2354 } 2355 2356 static const TypeInfo pci_device_type_info = { 2357 .name = TYPE_PCI_DEVICE, 2358 .parent = TYPE_DEVICE, 2359 .instance_size = sizeof(PCIDevice), 2360 .abstract = true, 2361 .class_size = sizeof(PCIDeviceClass), 2362 .class_init = pci_device_class_init, 2363 }; 2364 2365 static void pci_register_types(void) 2366 { 2367 type_register_static(&pci_bus_info); 2368 type_register_static(&pcie_bus_info); 2369 type_register_static(&pci_device_type_info); 2370 } 2371 2372 type_init(pci_register_types) 2373