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 25 #include "qemu/osdep.h" 26 #include "qemu-common.h" 27 #include "hw/irq.h" 28 #include "hw/pci/pci.h" 29 #include "hw/pci/pci_bridge.h" 30 #include "hw/pci/pci_bus.h" 31 #include "hw/pci/pci_host.h" 32 #include "hw/qdev-properties.h" 33 #include "migration/qemu-file-types.h" 34 #include "migration/vmstate.h" 35 #include "monitor/monitor.h" 36 #include "net/net.h" 37 #include "sysemu/numa.h" 38 #include "sysemu/sysemu.h" 39 #include "hw/loader.h" 40 #include "qemu/error-report.h" 41 #include "qemu/range.h" 42 #include "trace.h" 43 #include "hw/pci/msi.h" 44 #include "hw/pci/msix.h" 45 #include "exec/address-spaces.h" 46 #include "hw/hotplug.h" 47 #include "hw/boards.h" 48 #include "qapi/error.h" 49 #include "qapi/qapi-commands-misc.h" 50 #include "qemu/cutils.h" 51 52 //#define DEBUG_PCI 53 #ifdef DEBUG_PCI 54 # define PCI_DPRINTF(format, ...) printf(format, ## __VA_ARGS__) 55 #else 56 # define PCI_DPRINTF(format, ...) do { } while (0) 57 #endif 58 59 bool pci_available = true; 60 61 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent); 62 static char *pcibus_get_dev_path(DeviceState *dev); 63 static char *pcibus_get_fw_dev_path(DeviceState *dev); 64 static void pcibus_reset(BusState *qbus); 65 66 static Property pci_props[] = { 67 DEFINE_PROP_PCI_DEVFN("addr", PCIDevice, devfn, -1), 68 DEFINE_PROP_STRING("romfile", PCIDevice, romfile), 69 DEFINE_PROP_UINT32("rombar", PCIDevice, rom_bar, 1), 70 DEFINE_PROP_BIT("multifunction", PCIDevice, cap_present, 71 QEMU_PCI_CAP_MULTIFUNCTION_BITNR, false), 72 DEFINE_PROP_BIT("x-pcie-lnksta-dllla", PCIDevice, cap_present, 73 QEMU_PCIE_LNKSTA_DLLLA_BITNR, true), 74 DEFINE_PROP_BIT("x-pcie-extcap-init", PCIDevice, cap_present, 75 QEMU_PCIE_EXTCAP_INIT_BITNR, true), 76 DEFINE_PROP_STRING("failover_pair_id", PCIDevice, 77 failover_pair_id), 78 DEFINE_PROP_END_OF_LIST() 79 }; 80 81 static const VMStateDescription vmstate_pcibus = { 82 .name = "PCIBUS", 83 .version_id = 1, 84 .minimum_version_id = 1, 85 .fields = (VMStateField[]) { 86 VMSTATE_INT32_EQUAL(nirq, PCIBus, NULL), 87 VMSTATE_VARRAY_INT32(irq_count, PCIBus, 88 nirq, 0, vmstate_info_int32, 89 int32_t), 90 VMSTATE_END_OF_LIST() 91 } 92 }; 93 94 static void pci_init_bus_master(PCIDevice *pci_dev) 95 { 96 AddressSpace *dma_as = pci_device_iommu_address_space(pci_dev); 97 98 memory_region_init_alias(&pci_dev->bus_master_enable_region, 99 OBJECT(pci_dev), "bus master", 100 dma_as->root, 0, memory_region_size(dma_as->root)); 101 memory_region_set_enabled(&pci_dev->bus_master_enable_region, false); 102 memory_region_add_subregion(&pci_dev->bus_master_container_region, 0, 103 &pci_dev->bus_master_enable_region); 104 } 105 106 static void pcibus_machine_done(Notifier *notifier, void *data) 107 { 108 PCIBus *bus = container_of(notifier, PCIBus, machine_done); 109 int i; 110 111 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { 112 if (bus->devices[i]) { 113 pci_init_bus_master(bus->devices[i]); 114 } 115 } 116 } 117 118 static void pci_bus_realize(BusState *qbus, Error **errp) 119 { 120 PCIBus *bus = PCI_BUS(qbus); 121 122 bus->machine_done.notify = pcibus_machine_done; 123 qemu_add_machine_init_done_notifier(&bus->machine_done); 124 125 vmstate_register(NULL, VMSTATE_INSTANCE_ID_ANY, &vmstate_pcibus, bus); 126 } 127 128 static void pcie_bus_realize(BusState *qbus, Error **errp) 129 { 130 PCIBus *bus = PCI_BUS(qbus); 131 132 pci_bus_realize(qbus, errp); 133 134 /* 135 * A PCI-E bus can support extended config space if it's the root 136 * bus, or if the bus/bridge above it does as well 137 */ 138 if (pci_bus_is_root(bus)) { 139 bus->flags |= PCI_BUS_EXTENDED_CONFIG_SPACE; 140 } else { 141 PCIBus *parent_bus = pci_get_bus(bus->parent_dev); 142 143 if (pci_bus_allows_extended_config_space(parent_bus)) { 144 bus->flags |= PCI_BUS_EXTENDED_CONFIG_SPACE; 145 } 146 } 147 } 148 149 static void pci_bus_unrealize(BusState *qbus) 150 { 151 PCIBus *bus = PCI_BUS(qbus); 152 153 qemu_remove_machine_init_done_notifier(&bus->machine_done); 154 155 vmstate_unregister(NULL, &vmstate_pcibus, bus); 156 } 157 158 static int pcibus_num(PCIBus *bus) 159 { 160 if (pci_bus_is_root(bus)) { 161 return 0; /* pci host bridge */ 162 } 163 return bus->parent_dev->config[PCI_SECONDARY_BUS]; 164 } 165 166 static uint16_t pcibus_numa_node(PCIBus *bus) 167 { 168 return NUMA_NODE_UNASSIGNED; 169 } 170 171 static void pci_bus_class_init(ObjectClass *klass, void *data) 172 { 173 BusClass *k = BUS_CLASS(klass); 174 PCIBusClass *pbc = PCI_BUS_CLASS(klass); 175 176 k->print_dev = pcibus_dev_print; 177 k->get_dev_path = pcibus_get_dev_path; 178 k->get_fw_dev_path = pcibus_get_fw_dev_path; 179 k->realize = pci_bus_realize; 180 k->unrealize = pci_bus_unrealize; 181 k->reset = pcibus_reset; 182 183 pbc->bus_num = pcibus_num; 184 pbc->numa_node = pcibus_numa_node; 185 } 186 187 static const TypeInfo pci_bus_info = { 188 .name = TYPE_PCI_BUS, 189 .parent = TYPE_BUS, 190 .instance_size = sizeof(PCIBus), 191 .class_size = sizeof(PCIBusClass), 192 .class_init = pci_bus_class_init, 193 }; 194 195 static const TypeInfo pcie_interface_info = { 196 .name = INTERFACE_PCIE_DEVICE, 197 .parent = TYPE_INTERFACE, 198 }; 199 200 static const TypeInfo conventional_pci_interface_info = { 201 .name = INTERFACE_CONVENTIONAL_PCI_DEVICE, 202 .parent = TYPE_INTERFACE, 203 }; 204 205 static void pcie_bus_class_init(ObjectClass *klass, void *data) 206 { 207 BusClass *k = BUS_CLASS(klass); 208 209 k->realize = pcie_bus_realize; 210 } 211 212 static const TypeInfo pcie_bus_info = { 213 .name = TYPE_PCIE_BUS, 214 .parent = TYPE_PCI_BUS, 215 .class_init = pcie_bus_class_init, 216 }; 217 218 static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num); 219 static void pci_update_mappings(PCIDevice *d); 220 static void pci_irq_handler(void *opaque, int irq_num, int level); 221 static void pci_add_option_rom(PCIDevice *pdev, bool is_default_rom, Error **); 222 static void pci_del_option_rom(PCIDevice *pdev); 223 224 static uint16_t pci_default_sub_vendor_id = PCI_SUBVENDOR_ID_REDHAT_QUMRANET; 225 static uint16_t pci_default_sub_device_id = PCI_SUBDEVICE_ID_QEMU; 226 227 static QLIST_HEAD(, PCIHostState) pci_host_bridges; 228 229 int pci_bar(PCIDevice *d, int reg) 230 { 231 uint8_t type; 232 233 if (reg != PCI_ROM_SLOT) 234 return PCI_BASE_ADDRESS_0 + reg * 4; 235 236 type = d->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION; 237 return type == PCI_HEADER_TYPE_BRIDGE ? PCI_ROM_ADDRESS1 : PCI_ROM_ADDRESS; 238 } 239 240 static inline int pci_irq_state(PCIDevice *d, int irq_num) 241 { 242 return (d->irq_state >> irq_num) & 0x1; 243 } 244 245 static inline void pci_set_irq_state(PCIDevice *d, int irq_num, int level) 246 { 247 d->irq_state &= ~(0x1 << irq_num); 248 d->irq_state |= level << irq_num; 249 } 250 251 static void pci_change_irq_level(PCIDevice *pci_dev, int irq_num, int change) 252 { 253 PCIBus *bus; 254 for (;;) { 255 bus = pci_get_bus(pci_dev); 256 irq_num = bus->map_irq(pci_dev, irq_num); 257 if (bus->set_irq) 258 break; 259 pci_dev = bus->parent_dev; 260 } 261 bus->irq_count[irq_num] += change; 262 bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0); 263 } 264 265 int pci_bus_get_irq_level(PCIBus *bus, int irq_num) 266 { 267 assert(irq_num >= 0); 268 assert(irq_num < bus->nirq); 269 return !!bus->irq_count[irq_num]; 270 } 271 272 /* Update interrupt status bit in config space on interrupt 273 * state change. */ 274 static void pci_update_irq_status(PCIDevice *dev) 275 { 276 if (dev->irq_state) { 277 dev->config[PCI_STATUS] |= PCI_STATUS_INTERRUPT; 278 } else { 279 dev->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT; 280 } 281 } 282 283 void pci_device_deassert_intx(PCIDevice *dev) 284 { 285 int i; 286 for (i = 0; i < PCI_NUM_PINS; ++i) { 287 pci_irq_handler(dev, i, 0); 288 } 289 } 290 291 static void pci_do_device_reset(PCIDevice *dev) 292 { 293 int r; 294 295 pci_device_deassert_intx(dev); 296 assert(dev->irq_state == 0); 297 298 /* Clear all writable bits */ 299 pci_word_test_and_clear_mask(dev->config + PCI_COMMAND, 300 pci_get_word(dev->wmask + PCI_COMMAND) | 301 pci_get_word(dev->w1cmask + PCI_COMMAND)); 302 pci_word_test_and_clear_mask(dev->config + PCI_STATUS, 303 pci_get_word(dev->wmask + PCI_STATUS) | 304 pci_get_word(dev->w1cmask + PCI_STATUS)); 305 /* Some devices make bits of PCI_INTERRUPT_LINE read only */ 306 pci_byte_test_and_clear_mask(dev->config + PCI_INTERRUPT_LINE, 307 pci_get_word(dev->wmask + PCI_INTERRUPT_LINE) | 308 pci_get_word(dev->w1cmask + PCI_INTERRUPT_LINE)); 309 dev->config[PCI_CACHE_LINE_SIZE] = 0x0; 310 for (r = 0; r < PCI_NUM_REGIONS; ++r) { 311 PCIIORegion *region = &dev->io_regions[r]; 312 if (!region->size) { 313 continue; 314 } 315 316 if (!(region->type & PCI_BASE_ADDRESS_SPACE_IO) && 317 region->type & PCI_BASE_ADDRESS_MEM_TYPE_64) { 318 pci_set_quad(dev->config + pci_bar(dev, r), region->type); 319 } else { 320 pci_set_long(dev->config + pci_bar(dev, r), region->type); 321 } 322 } 323 pci_update_mappings(dev); 324 325 msi_reset(dev); 326 msix_reset(dev); 327 } 328 329 /* 330 * This function is called on #RST and FLR. 331 * FLR if PCI_EXP_DEVCTL_BCR_FLR is set 332 */ 333 void pci_device_reset(PCIDevice *dev) 334 { 335 qdev_reset_all(&dev->qdev); 336 pci_do_device_reset(dev); 337 } 338 339 /* 340 * Trigger pci bus reset under a given bus. 341 * Called via qbus_reset_all on RST# assert, after the devices 342 * have been reset qdev_reset_all-ed already. 343 */ 344 static void pcibus_reset(BusState *qbus) 345 { 346 PCIBus *bus = DO_UPCAST(PCIBus, qbus, qbus); 347 int i; 348 349 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { 350 if (bus->devices[i]) { 351 pci_do_device_reset(bus->devices[i]); 352 } 353 } 354 355 for (i = 0; i < bus->nirq; i++) { 356 assert(bus->irq_count[i] == 0); 357 } 358 } 359 360 static void pci_host_bus_register(DeviceState *host) 361 { 362 PCIHostState *host_bridge = PCI_HOST_BRIDGE(host); 363 364 QLIST_INSERT_HEAD(&pci_host_bridges, host_bridge, next); 365 } 366 367 static void pci_host_bus_unregister(DeviceState *host) 368 { 369 PCIHostState *host_bridge = PCI_HOST_BRIDGE(host); 370 371 QLIST_REMOVE(host_bridge, next); 372 } 373 374 PCIBus *pci_device_root_bus(const PCIDevice *d) 375 { 376 PCIBus *bus = pci_get_bus(d); 377 378 while (!pci_bus_is_root(bus)) { 379 d = bus->parent_dev; 380 assert(d != NULL); 381 382 bus = pci_get_bus(d); 383 } 384 385 return bus; 386 } 387 388 const char *pci_root_bus_path(PCIDevice *dev) 389 { 390 PCIBus *rootbus = pci_device_root_bus(dev); 391 PCIHostState *host_bridge = PCI_HOST_BRIDGE(rootbus->qbus.parent); 392 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_GET_CLASS(host_bridge); 393 394 assert(host_bridge->bus == rootbus); 395 396 if (hc->root_bus_path) { 397 return (*hc->root_bus_path)(host_bridge, rootbus); 398 } 399 400 return rootbus->qbus.name; 401 } 402 403 static void pci_root_bus_init(PCIBus *bus, DeviceState *parent, 404 MemoryRegion *address_space_mem, 405 MemoryRegion *address_space_io, 406 uint8_t devfn_min) 407 { 408 assert(PCI_FUNC(devfn_min) == 0); 409 bus->devfn_min = devfn_min; 410 bus->slot_reserved_mask = 0x0; 411 bus->address_space_mem = address_space_mem; 412 bus->address_space_io = address_space_io; 413 bus->flags |= PCI_BUS_IS_ROOT; 414 415 /* host bridge */ 416 QLIST_INIT(&bus->child); 417 418 pci_host_bus_register(parent); 419 } 420 421 static void pci_bus_uninit(PCIBus *bus) 422 { 423 pci_host_bus_unregister(BUS(bus)->parent); 424 } 425 426 bool pci_bus_is_express(PCIBus *bus) 427 { 428 return object_dynamic_cast(OBJECT(bus), TYPE_PCIE_BUS); 429 } 430 431 void pci_root_bus_new_inplace(PCIBus *bus, size_t bus_size, DeviceState *parent, 432 const char *name, 433 MemoryRegion *address_space_mem, 434 MemoryRegion *address_space_io, 435 uint8_t devfn_min, const char *typename) 436 { 437 qbus_create_inplace(bus, bus_size, typename, parent, name); 438 pci_root_bus_init(bus, parent, address_space_mem, address_space_io, 439 devfn_min); 440 } 441 442 PCIBus *pci_root_bus_new(DeviceState *parent, const char *name, 443 MemoryRegion *address_space_mem, 444 MemoryRegion *address_space_io, 445 uint8_t devfn_min, const char *typename) 446 { 447 PCIBus *bus; 448 449 bus = PCI_BUS(qbus_create(typename, parent, name)); 450 pci_root_bus_init(bus, parent, address_space_mem, address_space_io, 451 devfn_min); 452 return bus; 453 } 454 455 void pci_root_bus_cleanup(PCIBus *bus) 456 { 457 pci_bus_uninit(bus); 458 /* the caller of the unplug hotplug handler will delete this device */ 459 qbus_unrealize(BUS(bus)); 460 } 461 462 void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq, 463 void *irq_opaque, int nirq) 464 { 465 bus->set_irq = set_irq; 466 bus->map_irq = map_irq; 467 bus->irq_opaque = irq_opaque; 468 bus->nirq = nirq; 469 bus->irq_count = g_malloc0(nirq * sizeof(bus->irq_count[0])); 470 } 471 472 void pci_bus_irqs_cleanup(PCIBus *bus) 473 { 474 bus->set_irq = NULL; 475 bus->map_irq = NULL; 476 bus->irq_opaque = NULL; 477 bus->nirq = 0; 478 g_free(bus->irq_count); 479 } 480 481 PCIBus *pci_register_root_bus(DeviceState *parent, const char *name, 482 pci_set_irq_fn set_irq, pci_map_irq_fn map_irq, 483 void *irq_opaque, 484 MemoryRegion *address_space_mem, 485 MemoryRegion *address_space_io, 486 uint8_t devfn_min, int nirq, 487 const char *typename) 488 { 489 PCIBus *bus; 490 491 bus = pci_root_bus_new(parent, name, address_space_mem, 492 address_space_io, devfn_min, typename); 493 pci_bus_irqs(bus, set_irq, map_irq, irq_opaque, nirq); 494 return bus; 495 } 496 497 void pci_unregister_root_bus(PCIBus *bus) 498 { 499 pci_bus_irqs_cleanup(bus); 500 pci_root_bus_cleanup(bus); 501 } 502 503 int pci_bus_num(PCIBus *s) 504 { 505 return PCI_BUS_GET_CLASS(s)->bus_num(s); 506 } 507 508 int pci_bus_numa_node(PCIBus *bus) 509 { 510 return PCI_BUS_GET_CLASS(bus)->numa_node(bus); 511 } 512 513 static int get_pci_config_device(QEMUFile *f, void *pv, size_t size, 514 const VMStateField *field) 515 { 516 PCIDevice *s = container_of(pv, PCIDevice, config); 517 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(s); 518 uint8_t *config; 519 int i; 520 521 assert(size == pci_config_size(s)); 522 config = g_malloc(size); 523 524 qemu_get_buffer(f, config, size); 525 for (i = 0; i < size; ++i) { 526 if ((config[i] ^ s->config[i]) & 527 s->cmask[i] & ~s->wmask[i] & ~s->w1cmask[i]) { 528 error_report("%s: Bad config data: i=0x%x read: %x device: %x " 529 "cmask: %x wmask: %x w1cmask:%x", __func__, 530 i, config[i], s->config[i], 531 s->cmask[i], s->wmask[i], s->w1cmask[i]); 532 g_free(config); 533 return -EINVAL; 534 } 535 } 536 memcpy(s->config, config, size); 537 538 pci_update_mappings(s); 539 if (pc->is_bridge) { 540 PCIBridge *b = PCI_BRIDGE(s); 541 pci_bridge_update_mappings(b); 542 } 543 544 memory_region_set_enabled(&s->bus_master_enable_region, 545 pci_get_word(s->config + PCI_COMMAND) 546 & PCI_COMMAND_MASTER); 547 548 g_free(config); 549 return 0; 550 } 551 552 /* just put buffer */ 553 static int put_pci_config_device(QEMUFile *f, void *pv, size_t size, 554 const VMStateField *field, QJSON *vmdesc) 555 { 556 const uint8_t **v = pv; 557 assert(size == pci_config_size(container_of(pv, PCIDevice, config))); 558 qemu_put_buffer(f, *v, size); 559 560 return 0; 561 } 562 563 static VMStateInfo vmstate_info_pci_config = { 564 .name = "pci config", 565 .get = get_pci_config_device, 566 .put = put_pci_config_device, 567 }; 568 569 static int get_pci_irq_state(QEMUFile *f, void *pv, size_t size, 570 const VMStateField *field) 571 { 572 PCIDevice *s = container_of(pv, PCIDevice, irq_state); 573 uint32_t irq_state[PCI_NUM_PINS]; 574 int i; 575 for (i = 0; i < PCI_NUM_PINS; ++i) { 576 irq_state[i] = qemu_get_be32(f); 577 if (irq_state[i] != 0x1 && irq_state[i] != 0) { 578 fprintf(stderr, "irq state %d: must be 0 or 1.\n", 579 irq_state[i]); 580 return -EINVAL; 581 } 582 } 583 584 for (i = 0; i < PCI_NUM_PINS; ++i) { 585 pci_set_irq_state(s, i, irq_state[i]); 586 } 587 588 return 0; 589 } 590 591 static int put_pci_irq_state(QEMUFile *f, void *pv, size_t size, 592 const VMStateField *field, QJSON *vmdesc) 593 { 594 int i; 595 PCIDevice *s = container_of(pv, PCIDevice, irq_state); 596 597 for (i = 0; i < PCI_NUM_PINS; ++i) { 598 qemu_put_be32(f, pci_irq_state(s, i)); 599 } 600 601 return 0; 602 } 603 604 static VMStateInfo vmstate_info_pci_irq_state = { 605 .name = "pci irq state", 606 .get = get_pci_irq_state, 607 .put = put_pci_irq_state, 608 }; 609 610 static bool migrate_is_pcie(void *opaque, int version_id) 611 { 612 return pci_is_express((PCIDevice *)opaque); 613 } 614 615 static bool migrate_is_not_pcie(void *opaque, int version_id) 616 { 617 return !pci_is_express((PCIDevice *)opaque); 618 } 619 620 const VMStateDescription vmstate_pci_device = { 621 .name = "PCIDevice", 622 .version_id = 2, 623 .minimum_version_id = 1, 624 .fields = (VMStateField[]) { 625 VMSTATE_INT32_POSITIVE_LE(version_id, PCIDevice), 626 VMSTATE_BUFFER_UNSAFE_INFO_TEST(config, PCIDevice, 627 migrate_is_not_pcie, 628 0, vmstate_info_pci_config, 629 PCI_CONFIG_SPACE_SIZE), 630 VMSTATE_BUFFER_UNSAFE_INFO_TEST(config, PCIDevice, 631 migrate_is_pcie, 632 0, vmstate_info_pci_config, 633 PCIE_CONFIG_SPACE_SIZE), 634 VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2, 635 vmstate_info_pci_irq_state, 636 PCI_NUM_PINS * sizeof(int32_t)), 637 VMSTATE_END_OF_LIST() 638 } 639 }; 640 641 642 void pci_device_save(PCIDevice *s, QEMUFile *f) 643 { 644 /* Clear interrupt status bit: it is implicit 645 * in irq_state which we are saving. 646 * This makes us compatible with old devices 647 * which never set or clear this bit. */ 648 s->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT; 649 vmstate_save_state(f, &vmstate_pci_device, s, NULL); 650 /* Restore the interrupt status bit. */ 651 pci_update_irq_status(s); 652 } 653 654 int pci_device_load(PCIDevice *s, QEMUFile *f) 655 { 656 int ret; 657 ret = vmstate_load_state(f, &vmstate_pci_device, s, s->version_id); 658 /* Restore the interrupt status bit. */ 659 pci_update_irq_status(s); 660 return ret; 661 } 662 663 static void pci_set_default_subsystem_id(PCIDevice *pci_dev) 664 { 665 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID, 666 pci_default_sub_vendor_id); 667 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID, 668 pci_default_sub_device_id); 669 } 670 671 /* 672 * Parse [[<domain>:]<bus>:]<slot>, return -1 on error if funcp == NULL 673 * [[<domain>:]<bus>:]<slot>.<func>, return -1 on error 674 */ 675 static int pci_parse_devaddr(const char *addr, int *domp, int *busp, 676 unsigned int *slotp, unsigned int *funcp) 677 { 678 const char *p; 679 char *e; 680 unsigned long val; 681 unsigned long dom = 0, bus = 0; 682 unsigned int slot = 0; 683 unsigned int func = 0; 684 685 p = addr; 686 val = strtoul(p, &e, 16); 687 if (e == p) 688 return -1; 689 if (*e == ':') { 690 bus = val; 691 p = e + 1; 692 val = strtoul(p, &e, 16); 693 if (e == p) 694 return -1; 695 if (*e == ':') { 696 dom = bus; 697 bus = val; 698 p = e + 1; 699 val = strtoul(p, &e, 16); 700 if (e == p) 701 return -1; 702 } 703 } 704 705 slot = val; 706 707 if (funcp != NULL) { 708 if (*e != '.') 709 return -1; 710 711 p = e + 1; 712 val = strtoul(p, &e, 16); 713 if (e == p) 714 return -1; 715 716 func = val; 717 } 718 719 /* if funcp == NULL func is 0 */ 720 if (dom > 0xffff || bus > 0xff || slot > 0x1f || func > 7) 721 return -1; 722 723 if (*e) 724 return -1; 725 726 *domp = dom; 727 *busp = bus; 728 *slotp = slot; 729 if (funcp != NULL) 730 *funcp = func; 731 return 0; 732 } 733 734 static void pci_init_cmask(PCIDevice *dev) 735 { 736 pci_set_word(dev->cmask + PCI_VENDOR_ID, 0xffff); 737 pci_set_word(dev->cmask + PCI_DEVICE_ID, 0xffff); 738 dev->cmask[PCI_STATUS] = PCI_STATUS_CAP_LIST; 739 dev->cmask[PCI_REVISION_ID] = 0xff; 740 dev->cmask[PCI_CLASS_PROG] = 0xff; 741 pci_set_word(dev->cmask + PCI_CLASS_DEVICE, 0xffff); 742 dev->cmask[PCI_HEADER_TYPE] = 0xff; 743 dev->cmask[PCI_CAPABILITY_LIST] = 0xff; 744 } 745 746 static void pci_init_wmask(PCIDevice *dev) 747 { 748 int config_size = pci_config_size(dev); 749 750 dev->wmask[PCI_CACHE_LINE_SIZE] = 0xff; 751 dev->wmask[PCI_INTERRUPT_LINE] = 0xff; 752 pci_set_word(dev->wmask + PCI_COMMAND, 753 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 754 PCI_COMMAND_INTX_DISABLE); 755 pci_word_test_and_set_mask(dev->wmask + PCI_COMMAND, PCI_COMMAND_SERR); 756 757 memset(dev->wmask + PCI_CONFIG_HEADER_SIZE, 0xff, 758 config_size - PCI_CONFIG_HEADER_SIZE); 759 } 760 761 static void pci_init_w1cmask(PCIDevice *dev) 762 { 763 /* 764 * Note: It's okay to set w1cmask even for readonly bits as 765 * long as their value is hardwired to 0. 766 */ 767 pci_set_word(dev->w1cmask + PCI_STATUS, 768 PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT | 769 PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT | 770 PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY); 771 } 772 773 static void pci_init_mask_bridge(PCIDevice *d) 774 { 775 /* PCI_PRIMARY_BUS, PCI_SECONDARY_BUS, PCI_SUBORDINATE_BUS and 776 PCI_SEC_LETENCY_TIMER */ 777 memset(d->wmask + PCI_PRIMARY_BUS, 0xff, 4); 778 779 /* base and limit */ 780 d->wmask[PCI_IO_BASE] = PCI_IO_RANGE_MASK & 0xff; 781 d->wmask[PCI_IO_LIMIT] = PCI_IO_RANGE_MASK & 0xff; 782 pci_set_word(d->wmask + PCI_MEMORY_BASE, 783 PCI_MEMORY_RANGE_MASK & 0xffff); 784 pci_set_word(d->wmask + PCI_MEMORY_LIMIT, 785 PCI_MEMORY_RANGE_MASK & 0xffff); 786 pci_set_word(d->wmask + PCI_PREF_MEMORY_BASE, 787 PCI_PREF_RANGE_MASK & 0xffff); 788 pci_set_word(d->wmask + PCI_PREF_MEMORY_LIMIT, 789 PCI_PREF_RANGE_MASK & 0xffff); 790 791 /* PCI_PREF_BASE_UPPER32 and PCI_PREF_LIMIT_UPPER32 */ 792 memset(d->wmask + PCI_PREF_BASE_UPPER32, 0xff, 8); 793 794 /* Supported memory and i/o types */ 795 d->config[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_16; 796 d->config[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_16; 797 pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_BASE, 798 PCI_PREF_RANGE_TYPE_64); 799 pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_LIMIT, 800 PCI_PREF_RANGE_TYPE_64); 801 802 /* 803 * TODO: Bridges default to 10-bit VGA decoding but we currently only 804 * implement 16-bit decoding (no alias support). 805 */ 806 pci_set_word(d->wmask + PCI_BRIDGE_CONTROL, 807 PCI_BRIDGE_CTL_PARITY | 808 PCI_BRIDGE_CTL_SERR | 809 PCI_BRIDGE_CTL_ISA | 810 PCI_BRIDGE_CTL_VGA | 811 PCI_BRIDGE_CTL_VGA_16BIT | 812 PCI_BRIDGE_CTL_MASTER_ABORT | 813 PCI_BRIDGE_CTL_BUS_RESET | 814 PCI_BRIDGE_CTL_FAST_BACK | 815 PCI_BRIDGE_CTL_DISCARD | 816 PCI_BRIDGE_CTL_SEC_DISCARD | 817 PCI_BRIDGE_CTL_DISCARD_SERR); 818 /* Below does not do anything as we never set this bit, put here for 819 * completeness. */ 820 pci_set_word(d->w1cmask + PCI_BRIDGE_CONTROL, 821 PCI_BRIDGE_CTL_DISCARD_STATUS); 822 d->cmask[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_MASK; 823 d->cmask[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_MASK; 824 pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_BASE, 825 PCI_PREF_RANGE_TYPE_MASK); 826 pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_LIMIT, 827 PCI_PREF_RANGE_TYPE_MASK); 828 } 829 830 static void pci_init_multifunction(PCIBus *bus, PCIDevice *dev, Error **errp) 831 { 832 uint8_t slot = PCI_SLOT(dev->devfn); 833 uint8_t func; 834 835 if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { 836 dev->config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION; 837 } 838 839 /* 840 * multifunction bit is interpreted in two ways as follows. 841 * - all functions must set the bit to 1. 842 * Example: Intel X53 843 * - function 0 must set the bit, but the rest function (> 0) 844 * is allowed to leave the bit to 0. 845 * Example: PIIX3(also in qemu), PIIX4(also in qemu), ICH10, 846 * 847 * So OS (at least Linux) checks the bit of only function 0, 848 * and doesn't see the bit of function > 0. 849 * 850 * The below check allows both interpretation. 851 */ 852 if (PCI_FUNC(dev->devfn)) { 853 PCIDevice *f0 = bus->devices[PCI_DEVFN(slot, 0)]; 854 if (f0 && !(f0->cap_present & QEMU_PCI_CAP_MULTIFUNCTION)) { 855 /* function 0 should set multifunction bit */ 856 error_setg(errp, "PCI: single function device can't be populated " 857 "in function %x.%x", slot, PCI_FUNC(dev->devfn)); 858 return; 859 } 860 return; 861 } 862 863 if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { 864 return; 865 } 866 /* function 0 indicates single function, so function > 0 must be NULL */ 867 for (func = 1; func < PCI_FUNC_MAX; ++func) { 868 if (bus->devices[PCI_DEVFN(slot, func)]) { 869 error_setg(errp, "PCI: %x.0 indicates single function, " 870 "but %x.%x is already populated.", 871 slot, slot, func); 872 return; 873 } 874 } 875 } 876 877 static void pci_config_alloc(PCIDevice *pci_dev) 878 { 879 int config_size = pci_config_size(pci_dev); 880 881 pci_dev->config = g_malloc0(config_size); 882 pci_dev->cmask = g_malloc0(config_size); 883 pci_dev->wmask = g_malloc0(config_size); 884 pci_dev->w1cmask = g_malloc0(config_size); 885 pci_dev->used = g_malloc0(config_size); 886 } 887 888 static void pci_config_free(PCIDevice *pci_dev) 889 { 890 g_free(pci_dev->config); 891 g_free(pci_dev->cmask); 892 g_free(pci_dev->wmask); 893 g_free(pci_dev->w1cmask); 894 g_free(pci_dev->used); 895 } 896 897 static void do_pci_unregister_device(PCIDevice *pci_dev) 898 { 899 pci_get_bus(pci_dev)->devices[pci_dev->devfn] = NULL; 900 pci_config_free(pci_dev); 901 902 if (memory_region_is_mapped(&pci_dev->bus_master_enable_region)) { 903 memory_region_del_subregion(&pci_dev->bus_master_container_region, 904 &pci_dev->bus_master_enable_region); 905 } 906 address_space_destroy(&pci_dev->bus_master_as); 907 } 908 909 /* Extract PCIReqIDCache into BDF format */ 910 static uint16_t pci_req_id_cache_extract(PCIReqIDCache *cache) 911 { 912 uint8_t bus_n; 913 uint16_t result; 914 915 switch (cache->type) { 916 case PCI_REQ_ID_BDF: 917 result = pci_get_bdf(cache->dev); 918 break; 919 case PCI_REQ_ID_SECONDARY_BUS: 920 bus_n = pci_dev_bus_num(cache->dev); 921 result = PCI_BUILD_BDF(bus_n, 0); 922 break; 923 default: 924 error_report("Invalid PCI requester ID cache type: %d", 925 cache->type); 926 exit(1); 927 break; 928 } 929 930 return result; 931 } 932 933 /* Parse bridges up to the root complex and return requester ID 934 * cache for specific device. For full PCIe topology, the cache 935 * result would be exactly the same as getting BDF of the device. 936 * However, several tricks are required when system mixed up with 937 * legacy PCI devices and PCIe-to-PCI bridges. 938 * 939 * Here we cache the proxy device (and type) not requester ID since 940 * bus number might change from time to time. 941 */ 942 static PCIReqIDCache pci_req_id_cache_get(PCIDevice *dev) 943 { 944 PCIDevice *parent; 945 PCIReqIDCache cache = { 946 .dev = dev, 947 .type = PCI_REQ_ID_BDF, 948 }; 949 950 while (!pci_bus_is_root(pci_get_bus(dev))) { 951 /* We are under PCI/PCIe bridges */ 952 parent = pci_get_bus(dev)->parent_dev; 953 if (pci_is_express(parent)) { 954 if (pcie_cap_get_type(parent) == PCI_EXP_TYPE_PCI_BRIDGE) { 955 /* When we pass through PCIe-to-PCI/PCIX bridges, we 956 * override the requester ID using secondary bus 957 * number of parent bridge with zeroed devfn 958 * (pcie-to-pci bridge spec chap 2.3). */ 959 cache.type = PCI_REQ_ID_SECONDARY_BUS; 960 cache.dev = dev; 961 } 962 } else { 963 /* Legacy PCI, override requester ID with the bridge's 964 * BDF upstream. When the root complex connects to 965 * legacy PCI devices (including buses), it can only 966 * obtain requester ID info from directly attached 967 * devices. If devices are attached under bridges, only 968 * the requester ID of the bridge that is directly 969 * attached to the root complex can be recognized. */ 970 cache.type = PCI_REQ_ID_BDF; 971 cache.dev = parent; 972 } 973 dev = parent; 974 } 975 976 return cache; 977 } 978 979 uint16_t pci_requester_id(PCIDevice *dev) 980 { 981 return pci_req_id_cache_extract(&dev->requester_id_cache); 982 } 983 984 static bool pci_bus_devfn_available(PCIBus *bus, int devfn) 985 { 986 return !(bus->devices[devfn]); 987 } 988 989 static bool pci_bus_devfn_reserved(PCIBus *bus, int devfn) 990 { 991 return bus->slot_reserved_mask & (1UL << PCI_SLOT(devfn)); 992 } 993 994 /* -1 for devfn means auto assign */ 995 static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, 996 const char *name, int devfn, 997 Error **errp) 998 { 999 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev); 1000 PCIConfigReadFunc *config_read = pc->config_read; 1001 PCIConfigWriteFunc *config_write = pc->config_write; 1002 Error *local_err = NULL; 1003 DeviceState *dev = DEVICE(pci_dev); 1004 PCIBus *bus = pci_get_bus(pci_dev); 1005 1006 /* Only pci bridges can be attached to extra PCI root buses */ 1007 if (pci_bus_is_root(bus) && bus->parent_dev && !pc->is_bridge) { 1008 error_setg(errp, 1009 "PCI: Only PCI/PCIe bridges can be plugged into %s", 1010 bus->parent_dev->name); 1011 return NULL; 1012 } 1013 1014 if (devfn < 0) { 1015 for(devfn = bus->devfn_min ; devfn < ARRAY_SIZE(bus->devices); 1016 devfn += PCI_FUNC_MAX) { 1017 if (pci_bus_devfn_available(bus, devfn) && 1018 !pci_bus_devfn_reserved(bus, devfn)) { 1019 goto found; 1020 } 1021 } 1022 error_setg(errp, "PCI: no slot/function available for %s, all in use " 1023 "or reserved", name); 1024 return NULL; 1025 found: ; 1026 } else if (pci_bus_devfn_reserved(bus, devfn)) { 1027 error_setg(errp, "PCI: slot %d function %d not available for %s," 1028 " reserved", 1029 PCI_SLOT(devfn), PCI_FUNC(devfn), name); 1030 return NULL; 1031 } else if (!pci_bus_devfn_available(bus, devfn)) { 1032 error_setg(errp, "PCI: slot %d function %d not available for %s," 1033 " in use by %s", 1034 PCI_SLOT(devfn), PCI_FUNC(devfn), name, 1035 bus->devices[devfn]->name); 1036 return NULL; 1037 } else if (dev->hotplugged && 1038 pci_get_function_0(pci_dev)) { 1039 error_setg(errp, "PCI: slot %d function 0 already ocuppied by %s," 1040 " new func %s cannot be exposed to guest.", 1041 PCI_SLOT(pci_get_function_0(pci_dev)->devfn), 1042 pci_get_function_0(pci_dev)->name, 1043 name); 1044 1045 return NULL; 1046 } 1047 1048 pci_dev->devfn = devfn; 1049 pci_dev->requester_id_cache = pci_req_id_cache_get(pci_dev); 1050 pstrcpy(pci_dev->name, sizeof(pci_dev->name), name); 1051 1052 memory_region_init(&pci_dev->bus_master_container_region, OBJECT(pci_dev), 1053 "bus master container", UINT64_MAX); 1054 address_space_init(&pci_dev->bus_master_as, 1055 &pci_dev->bus_master_container_region, pci_dev->name); 1056 1057 if (qdev_hotplug) { 1058 pci_init_bus_master(pci_dev); 1059 } 1060 pci_dev->irq_state = 0; 1061 pci_config_alloc(pci_dev); 1062 1063 pci_config_set_vendor_id(pci_dev->config, pc->vendor_id); 1064 pci_config_set_device_id(pci_dev->config, pc->device_id); 1065 pci_config_set_revision(pci_dev->config, pc->revision); 1066 pci_config_set_class(pci_dev->config, pc->class_id); 1067 1068 if (!pc->is_bridge) { 1069 if (pc->subsystem_vendor_id || pc->subsystem_id) { 1070 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID, 1071 pc->subsystem_vendor_id); 1072 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID, 1073 pc->subsystem_id); 1074 } else { 1075 pci_set_default_subsystem_id(pci_dev); 1076 } 1077 } else { 1078 /* subsystem_vendor_id/subsystem_id are only for header type 0 */ 1079 assert(!pc->subsystem_vendor_id); 1080 assert(!pc->subsystem_id); 1081 } 1082 pci_init_cmask(pci_dev); 1083 pci_init_wmask(pci_dev); 1084 pci_init_w1cmask(pci_dev); 1085 if (pc->is_bridge) { 1086 pci_init_mask_bridge(pci_dev); 1087 } 1088 pci_init_multifunction(bus, pci_dev, &local_err); 1089 if (local_err) { 1090 error_propagate(errp, local_err); 1091 do_pci_unregister_device(pci_dev); 1092 return NULL; 1093 } 1094 1095 if (!config_read) 1096 config_read = pci_default_read_config; 1097 if (!config_write) 1098 config_write = pci_default_write_config; 1099 pci_dev->config_read = config_read; 1100 pci_dev->config_write = config_write; 1101 bus->devices[devfn] = pci_dev; 1102 pci_dev->version_id = 2; /* Current pci device vmstate version */ 1103 return pci_dev; 1104 } 1105 1106 static void pci_unregister_io_regions(PCIDevice *pci_dev) 1107 { 1108 PCIIORegion *r; 1109 int i; 1110 1111 for(i = 0; i < PCI_NUM_REGIONS; i++) { 1112 r = &pci_dev->io_regions[i]; 1113 if (!r->size || r->addr == PCI_BAR_UNMAPPED) 1114 continue; 1115 memory_region_del_subregion(r->address_space, r->memory); 1116 } 1117 1118 pci_unregister_vga(pci_dev); 1119 } 1120 1121 static void pci_qdev_unrealize(DeviceState *dev) 1122 { 1123 PCIDevice *pci_dev = PCI_DEVICE(dev); 1124 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev); 1125 1126 pci_unregister_io_regions(pci_dev); 1127 pci_del_option_rom(pci_dev); 1128 1129 if (pc->exit) { 1130 pc->exit(pci_dev); 1131 } 1132 1133 pci_device_deassert_intx(pci_dev); 1134 do_pci_unregister_device(pci_dev); 1135 } 1136 1137 void pci_register_bar(PCIDevice *pci_dev, int region_num, 1138 uint8_t type, MemoryRegion *memory) 1139 { 1140 PCIIORegion *r; 1141 uint32_t addr; /* offset in pci config space */ 1142 uint64_t wmask; 1143 pcibus_t size = memory_region_size(memory); 1144 1145 assert(region_num >= 0); 1146 assert(region_num < PCI_NUM_REGIONS); 1147 if (size & (size-1)) { 1148 error_report("ERROR: PCI region size must be pow2 " 1149 "type=0x%x, size=0x%"FMT_PCIBUS"", type, size); 1150 exit(1); 1151 } 1152 1153 r = &pci_dev->io_regions[region_num]; 1154 r->addr = PCI_BAR_UNMAPPED; 1155 r->size = size; 1156 r->type = type; 1157 r->memory = memory; 1158 r->address_space = type & PCI_BASE_ADDRESS_SPACE_IO 1159 ? pci_get_bus(pci_dev)->address_space_io 1160 : pci_get_bus(pci_dev)->address_space_mem; 1161 1162 wmask = ~(size - 1); 1163 if (region_num == PCI_ROM_SLOT) { 1164 /* ROM enable bit is writable */ 1165 wmask |= PCI_ROM_ADDRESS_ENABLE; 1166 } 1167 1168 addr = pci_bar(pci_dev, region_num); 1169 pci_set_long(pci_dev->config + addr, type); 1170 1171 if (!(r->type & PCI_BASE_ADDRESS_SPACE_IO) && 1172 r->type & PCI_BASE_ADDRESS_MEM_TYPE_64) { 1173 pci_set_quad(pci_dev->wmask + addr, wmask); 1174 pci_set_quad(pci_dev->cmask + addr, ~0ULL); 1175 } else { 1176 pci_set_long(pci_dev->wmask + addr, wmask & 0xffffffff); 1177 pci_set_long(pci_dev->cmask + addr, 0xffffffff); 1178 } 1179 } 1180 1181 static void pci_update_vga(PCIDevice *pci_dev) 1182 { 1183 uint16_t cmd; 1184 1185 if (!pci_dev->has_vga) { 1186 return; 1187 } 1188 1189 cmd = pci_get_word(pci_dev->config + PCI_COMMAND); 1190 1191 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_MEM], 1192 cmd & PCI_COMMAND_MEMORY); 1193 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO], 1194 cmd & PCI_COMMAND_IO); 1195 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI], 1196 cmd & PCI_COMMAND_IO); 1197 } 1198 1199 void pci_register_vga(PCIDevice *pci_dev, MemoryRegion *mem, 1200 MemoryRegion *io_lo, MemoryRegion *io_hi) 1201 { 1202 PCIBus *bus = pci_get_bus(pci_dev); 1203 1204 assert(!pci_dev->has_vga); 1205 1206 assert(memory_region_size(mem) == QEMU_PCI_VGA_MEM_SIZE); 1207 pci_dev->vga_regions[QEMU_PCI_VGA_MEM] = mem; 1208 memory_region_add_subregion_overlap(bus->address_space_mem, 1209 QEMU_PCI_VGA_MEM_BASE, mem, 1); 1210 1211 assert(memory_region_size(io_lo) == QEMU_PCI_VGA_IO_LO_SIZE); 1212 pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO] = io_lo; 1213 memory_region_add_subregion_overlap(bus->address_space_io, 1214 QEMU_PCI_VGA_IO_LO_BASE, io_lo, 1); 1215 1216 assert(memory_region_size(io_hi) == QEMU_PCI_VGA_IO_HI_SIZE); 1217 pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI] = io_hi; 1218 memory_region_add_subregion_overlap(bus->address_space_io, 1219 QEMU_PCI_VGA_IO_HI_BASE, io_hi, 1); 1220 pci_dev->has_vga = true; 1221 1222 pci_update_vga(pci_dev); 1223 } 1224 1225 void pci_unregister_vga(PCIDevice *pci_dev) 1226 { 1227 PCIBus *bus = pci_get_bus(pci_dev); 1228 1229 if (!pci_dev->has_vga) { 1230 return; 1231 } 1232 1233 memory_region_del_subregion(bus->address_space_mem, 1234 pci_dev->vga_regions[QEMU_PCI_VGA_MEM]); 1235 memory_region_del_subregion(bus->address_space_io, 1236 pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO]); 1237 memory_region_del_subregion(bus->address_space_io, 1238 pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI]); 1239 pci_dev->has_vga = false; 1240 } 1241 1242 pcibus_t pci_get_bar_addr(PCIDevice *pci_dev, int region_num) 1243 { 1244 return pci_dev->io_regions[region_num].addr; 1245 } 1246 1247 static pcibus_t pci_bar_address(PCIDevice *d, 1248 int reg, uint8_t type, pcibus_t size) 1249 { 1250 pcibus_t new_addr, last_addr; 1251 int bar = pci_bar(d, reg); 1252 uint16_t cmd = pci_get_word(d->config + PCI_COMMAND); 1253 Object *machine = qdev_get_machine(); 1254 ObjectClass *oc = object_get_class(machine); 1255 MachineClass *mc = MACHINE_CLASS(oc); 1256 bool allow_0_address = mc->pci_allow_0_address; 1257 1258 if (type & PCI_BASE_ADDRESS_SPACE_IO) { 1259 if (!(cmd & PCI_COMMAND_IO)) { 1260 return PCI_BAR_UNMAPPED; 1261 } 1262 new_addr = pci_get_long(d->config + bar) & ~(size - 1); 1263 last_addr = new_addr + size - 1; 1264 /* Check if 32 bit BAR wraps around explicitly. 1265 * TODO: make priorities correct and remove this work around. 1266 */ 1267 if (last_addr <= new_addr || last_addr >= UINT32_MAX || 1268 (!allow_0_address && new_addr == 0)) { 1269 return PCI_BAR_UNMAPPED; 1270 } 1271 return new_addr; 1272 } 1273 1274 if (!(cmd & PCI_COMMAND_MEMORY)) { 1275 return PCI_BAR_UNMAPPED; 1276 } 1277 if (type & PCI_BASE_ADDRESS_MEM_TYPE_64) { 1278 new_addr = pci_get_quad(d->config + bar); 1279 } else { 1280 new_addr = pci_get_long(d->config + bar); 1281 } 1282 /* the ROM slot has a specific enable bit */ 1283 if (reg == PCI_ROM_SLOT && !(new_addr & PCI_ROM_ADDRESS_ENABLE)) { 1284 return PCI_BAR_UNMAPPED; 1285 } 1286 new_addr &= ~(size - 1); 1287 last_addr = new_addr + size - 1; 1288 /* NOTE: we do not support wrapping */ 1289 /* XXX: as we cannot support really dynamic 1290 mappings, we handle specific values as invalid 1291 mappings. */ 1292 if (last_addr <= new_addr || last_addr == PCI_BAR_UNMAPPED || 1293 (!allow_0_address && new_addr == 0)) { 1294 return PCI_BAR_UNMAPPED; 1295 } 1296 1297 /* Now pcibus_t is 64bit. 1298 * Check if 32 bit BAR wraps around explicitly. 1299 * Without this, PC ide doesn't work well. 1300 * TODO: remove this work around. 1301 */ 1302 if (!(type & PCI_BASE_ADDRESS_MEM_TYPE_64) && last_addr >= UINT32_MAX) { 1303 return PCI_BAR_UNMAPPED; 1304 } 1305 1306 /* 1307 * OS is allowed to set BAR beyond its addressable 1308 * bits. For example, 32 bit OS can set 64bit bar 1309 * to >4G. Check it. TODO: we might need to support 1310 * it in the future for e.g. PAE. 1311 */ 1312 if (last_addr >= HWADDR_MAX) { 1313 return PCI_BAR_UNMAPPED; 1314 } 1315 1316 return new_addr; 1317 } 1318 1319 static void pci_update_mappings(PCIDevice *d) 1320 { 1321 PCIIORegion *r; 1322 int i; 1323 pcibus_t new_addr; 1324 1325 for(i = 0; i < PCI_NUM_REGIONS; i++) { 1326 r = &d->io_regions[i]; 1327 1328 /* this region isn't registered */ 1329 if (!r->size) 1330 continue; 1331 1332 new_addr = pci_bar_address(d, i, r->type, r->size); 1333 1334 /* This bar isn't changed */ 1335 if (new_addr == r->addr) 1336 continue; 1337 1338 /* now do the real mapping */ 1339 if (r->addr != PCI_BAR_UNMAPPED) { 1340 trace_pci_update_mappings_del(d, pci_dev_bus_num(d), 1341 PCI_SLOT(d->devfn), 1342 PCI_FUNC(d->devfn), 1343 i, r->addr, r->size); 1344 memory_region_del_subregion(r->address_space, r->memory); 1345 } 1346 r->addr = new_addr; 1347 if (r->addr != PCI_BAR_UNMAPPED) { 1348 trace_pci_update_mappings_add(d, pci_dev_bus_num(d), 1349 PCI_SLOT(d->devfn), 1350 PCI_FUNC(d->devfn), 1351 i, r->addr, r->size); 1352 memory_region_add_subregion_overlap(r->address_space, 1353 r->addr, r->memory, 1); 1354 } 1355 } 1356 1357 pci_update_vga(d); 1358 } 1359 1360 static inline int pci_irq_disabled(PCIDevice *d) 1361 { 1362 return pci_get_word(d->config + PCI_COMMAND) & PCI_COMMAND_INTX_DISABLE; 1363 } 1364 1365 /* Called after interrupt disabled field update in config space, 1366 * assert/deassert interrupts if necessary. 1367 * Gets original interrupt disable bit value (before update). */ 1368 static void pci_update_irq_disabled(PCIDevice *d, int was_irq_disabled) 1369 { 1370 int i, disabled = pci_irq_disabled(d); 1371 if (disabled == was_irq_disabled) 1372 return; 1373 for (i = 0; i < PCI_NUM_PINS; ++i) { 1374 int state = pci_irq_state(d, i); 1375 pci_change_irq_level(d, i, disabled ? -state : state); 1376 } 1377 } 1378 1379 uint32_t pci_default_read_config(PCIDevice *d, 1380 uint32_t address, int len) 1381 { 1382 uint32_t val = 0; 1383 1384 assert(address + len <= pci_config_size(d)); 1385 1386 if (pci_is_express_downstream_port(d) && 1387 ranges_overlap(address, len, d->exp.exp_cap + PCI_EXP_LNKSTA, 2)) { 1388 pcie_sync_bridge_lnk(d); 1389 } 1390 memcpy(&val, d->config + address, len); 1391 return le32_to_cpu(val); 1392 } 1393 1394 void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val_in, int l) 1395 { 1396 int i, was_irq_disabled = pci_irq_disabled(d); 1397 uint32_t val = val_in; 1398 1399 assert(addr + l <= pci_config_size(d)); 1400 1401 for (i = 0; i < l; val >>= 8, ++i) { 1402 uint8_t wmask = d->wmask[addr + i]; 1403 uint8_t w1cmask = d->w1cmask[addr + i]; 1404 assert(!(wmask & w1cmask)); 1405 d->config[addr + i] = (d->config[addr + i] & ~wmask) | (val & wmask); 1406 d->config[addr + i] &= ~(val & w1cmask); /* W1C: Write 1 to Clear */ 1407 } 1408 if (ranges_overlap(addr, l, PCI_BASE_ADDRESS_0, 24) || 1409 ranges_overlap(addr, l, PCI_ROM_ADDRESS, 4) || 1410 ranges_overlap(addr, l, PCI_ROM_ADDRESS1, 4) || 1411 range_covers_byte(addr, l, PCI_COMMAND)) 1412 pci_update_mappings(d); 1413 1414 if (range_covers_byte(addr, l, PCI_COMMAND)) { 1415 pci_update_irq_disabled(d, was_irq_disabled); 1416 memory_region_set_enabled(&d->bus_master_enable_region, 1417 pci_get_word(d->config + PCI_COMMAND) 1418 & PCI_COMMAND_MASTER); 1419 } 1420 1421 msi_write_config(d, addr, val_in, l); 1422 msix_write_config(d, addr, val_in, l); 1423 } 1424 1425 /***********************************************************/ 1426 /* generic PCI irq support */ 1427 1428 /* 0 <= irq_num <= 3. level must be 0 or 1 */ 1429 static void pci_irq_handler(void *opaque, int irq_num, int level) 1430 { 1431 PCIDevice *pci_dev = opaque; 1432 int change; 1433 1434 change = level - pci_irq_state(pci_dev, irq_num); 1435 if (!change) 1436 return; 1437 1438 pci_set_irq_state(pci_dev, irq_num, level); 1439 pci_update_irq_status(pci_dev); 1440 if (pci_irq_disabled(pci_dev)) 1441 return; 1442 pci_change_irq_level(pci_dev, irq_num, change); 1443 } 1444 1445 static inline int pci_intx(PCIDevice *pci_dev) 1446 { 1447 return pci_get_byte(pci_dev->config + PCI_INTERRUPT_PIN) - 1; 1448 } 1449 1450 qemu_irq pci_allocate_irq(PCIDevice *pci_dev) 1451 { 1452 int intx = pci_intx(pci_dev); 1453 1454 return qemu_allocate_irq(pci_irq_handler, pci_dev, intx); 1455 } 1456 1457 void pci_set_irq(PCIDevice *pci_dev, int level) 1458 { 1459 int intx = pci_intx(pci_dev); 1460 pci_irq_handler(pci_dev, intx, level); 1461 } 1462 1463 /* Special hooks used by device assignment */ 1464 void pci_bus_set_route_irq_fn(PCIBus *bus, pci_route_irq_fn route_intx_to_irq) 1465 { 1466 assert(pci_bus_is_root(bus)); 1467 bus->route_intx_to_irq = route_intx_to_irq; 1468 } 1469 1470 PCIINTxRoute pci_device_route_intx_to_irq(PCIDevice *dev, int pin) 1471 { 1472 PCIBus *bus; 1473 1474 do { 1475 bus = pci_get_bus(dev); 1476 pin = bus->map_irq(dev, pin); 1477 dev = bus->parent_dev; 1478 } while (dev); 1479 1480 if (!bus->route_intx_to_irq) { 1481 error_report("PCI: Bug - unimplemented PCI INTx routing (%s)", 1482 object_get_typename(OBJECT(bus->qbus.parent))); 1483 return (PCIINTxRoute) { PCI_INTX_DISABLED, -1 }; 1484 } 1485 1486 return bus->route_intx_to_irq(bus->irq_opaque, pin); 1487 } 1488 1489 bool pci_intx_route_changed(PCIINTxRoute *old, PCIINTxRoute *new) 1490 { 1491 return old->mode != new->mode || old->irq != new->irq; 1492 } 1493 1494 void pci_bus_fire_intx_routing_notifier(PCIBus *bus) 1495 { 1496 PCIDevice *dev; 1497 PCIBus *sec; 1498 int i; 1499 1500 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { 1501 dev = bus->devices[i]; 1502 if (dev && dev->intx_routing_notifier) { 1503 dev->intx_routing_notifier(dev); 1504 } 1505 } 1506 1507 QLIST_FOREACH(sec, &bus->child, sibling) { 1508 pci_bus_fire_intx_routing_notifier(sec); 1509 } 1510 } 1511 1512 void pci_device_set_intx_routing_notifier(PCIDevice *dev, 1513 PCIINTxRoutingNotifier notifier) 1514 { 1515 dev->intx_routing_notifier = notifier; 1516 } 1517 1518 /* 1519 * PCI-to-PCI bridge specification 1520 * 9.1: Interrupt routing. Table 9-1 1521 * 1522 * the PCI Express Base Specification, Revision 2.1 1523 * 2.2.8.1: INTx interrutp signaling - Rules 1524 * the Implementation Note 1525 * Table 2-20 1526 */ 1527 /* 1528 * 0 <= pin <= 3 0 = INTA, 1 = INTB, 2 = INTC, 3 = INTD 1529 * 0-origin unlike PCI interrupt pin register. 1530 */ 1531 int pci_swizzle_map_irq_fn(PCIDevice *pci_dev, int pin) 1532 { 1533 return pci_swizzle(PCI_SLOT(pci_dev->devfn), pin); 1534 } 1535 1536 /***********************************************************/ 1537 /* monitor info on PCI */ 1538 1539 typedef struct { 1540 uint16_t class; 1541 const char *desc; 1542 const char *fw_name; 1543 uint16_t fw_ign_bits; 1544 } pci_class_desc; 1545 1546 static const pci_class_desc pci_class_descriptions[] = 1547 { 1548 { 0x0001, "VGA controller", "display"}, 1549 { 0x0100, "SCSI controller", "scsi"}, 1550 { 0x0101, "IDE controller", "ide"}, 1551 { 0x0102, "Floppy controller", "fdc"}, 1552 { 0x0103, "IPI controller", "ipi"}, 1553 { 0x0104, "RAID controller", "raid"}, 1554 { 0x0106, "SATA controller"}, 1555 { 0x0107, "SAS controller"}, 1556 { 0x0180, "Storage controller"}, 1557 { 0x0200, "Ethernet controller", "ethernet"}, 1558 { 0x0201, "Token Ring controller", "token-ring"}, 1559 { 0x0202, "FDDI controller", "fddi"}, 1560 { 0x0203, "ATM controller", "atm"}, 1561 { 0x0280, "Network controller"}, 1562 { 0x0300, "VGA controller", "display", 0x00ff}, 1563 { 0x0301, "XGA controller"}, 1564 { 0x0302, "3D controller"}, 1565 { 0x0380, "Display controller"}, 1566 { 0x0400, "Video controller", "video"}, 1567 { 0x0401, "Audio controller", "sound"}, 1568 { 0x0402, "Phone"}, 1569 { 0x0403, "Audio controller", "sound"}, 1570 { 0x0480, "Multimedia controller"}, 1571 { 0x0500, "RAM controller", "memory"}, 1572 { 0x0501, "Flash controller", "flash"}, 1573 { 0x0580, "Memory controller"}, 1574 { 0x0600, "Host bridge", "host"}, 1575 { 0x0601, "ISA bridge", "isa"}, 1576 { 0x0602, "EISA bridge", "eisa"}, 1577 { 0x0603, "MC bridge", "mca"}, 1578 { 0x0604, "PCI bridge", "pci-bridge"}, 1579 { 0x0605, "PCMCIA bridge", "pcmcia"}, 1580 { 0x0606, "NUBUS bridge", "nubus"}, 1581 { 0x0607, "CARDBUS bridge", "cardbus"}, 1582 { 0x0608, "RACEWAY bridge"}, 1583 { 0x0680, "Bridge"}, 1584 { 0x0700, "Serial port", "serial"}, 1585 { 0x0701, "Parallel port", "parallel"}, 1586 { 0x0800, "Interrupt controller", "interrupt-controller"}, 1587 { 0x0801, "DMA controller", "dma-controller"}, 1588 { 0x0802, "Timer", "timer"}, 1589 { 0x0803, "RTC", "rtc"}, 1590 { 0x0900, "Keyboard", "keyboard"}, 1591 { 0x0901, "Pen", "pen"}, 1592 { 0x0902, "Mouse", "mouse"}, 1593 { 0x0A00, "Dock station", "dock", 0x00ff}, 1594 { 0x0B00, "i386 cpu", "cpu", 0x00ff}, 1595 { 0x0c00, "Fireware contorller", "fireware"}, 1596 { 0x0c01, "Access bus controller", "access-bus"}, 1597 { 0x0c02, "SSA controller", "ssa"}, 1598 { 0x0c03, "USB controller", "usb"}, 1599 { 0x0c04, "Fibre channel controller", "fibre-channel"}, 1600 { 0x0c05, "SMBus"}, 1601 { 0, NULL} 1602 }; 1603 1604 static void pci_for_each_device_under_bus_reverse(PCIBus *bus, 1605 void (*fn)(PCIBus *b, 1606 PCIDevice *d, 1607 void *opaque), 1608 void *opaque) 1609 { 1610 PCIDevice *d; 1611 int devfn; 1612 1613 for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { 1614 d = bus->devices[ARRAY_SIZE(bus->devices) - 1 - devfn]; 1615 if (d) { 1616 fn(bus, d, opaque); 1617 } 1618 } 1619 } 1620 1621 void pci_for_each_device_reverse(PCIBus *bus, int bus_num, 1622 void (*fn)(PCIBus *b, PCIDevice *d, void *opaque), 1623 void *opaque) 1624 { 1625 bus = pci_find_bus_nr(bus, bus_num); 1626 1627 if (bus) { 1628 pci_for_each_device_under_bus_reverse(bus, fn, opaque); 1629 } 1630 } 1631 1632 static void pci_for_each_device_under_bus(PCIBus *bus, 1633 void (*fn)(PCIBus *b, PCIDevice *d, 1634 void *opaque), 1635 void *opaque) 1636 { 1637 PCIDevice *d; 1638 int devfn; 1639 1640 for(devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { 1641 d = bus->devices[devfn]; 1642 if (d) { 1643 fn(bus, d, opaque); 1644 } 1645 } 1646 } 1647 1648 void pci_for_each_device(PCIBus *bus, int bus_num, 1649 void (*fn)(PCIBus *b, PCIDevice *d, void *opaque), 1650 void *opaque) 1651 { 1652 bus = pci_find_bus_nr(bus, bus_num); 1653 1654 if (bus) { 1655 pci_for_each_device_under_bus(bus, fn, opaque); 1656 } 1657 } 1658 1659 static const pci_class_desc *get_class_desc(int class) 1660 { 1661 const pci_class_desc *desc; 1662 1663 desc = pci_class_descriptions; 1664 while (desc->desc && class != desc->class) { 1665 desc++; 1666 } 1667 1668 return desc; 1669 } 1670 1671 static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num); 1672 1673 static PciMemoryRegionList *qmp_query_pci_regions(const PCIDevice *dev) 1674 { 1675 PciMemoryRegionList *head = NULL, *cur_item = NULL; 1676 int i; 1677 1678 for (i = 0; i < PCI_NUM_REGIONS; i++) { 1679 const PCIIORegion *r = &dev->io_regions[i]; 1680 PciMemoryRegionList *region; 1681 1682 if (!r->size) { 1683 continue; 1684 } 1685 1686 region = g_malloc0(sizeof(*region)); 1687 region->value = g_malloc0(sizeof(*region->value)); 1688 1689 if (r->type & PCI_BASE_ADDRESS_SPACE_IO) { 1690 region->value->type = g_strdup("io"); 1691 } else { 1692 region->value->type = g_strdup("memory"); 1693 region->value->has_prefetch = true; 1694 region->value->prefetch = !!(r->type & PCI_BASE_ADDRESS_MEM_PREFETCH); 1695 region->value->has_mem_type_64 = true; 1696 region->value->mem_type_64 = !!(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64); 1697 } 1698 1699 region->value->bar = i; 1700 region->value->address = r->addr; 1701 region->value->size = r->size; 1702 1703 /* XXX: waiting for the qapi to support GSList */ 1704 if (!cur_item) { 1705 head = cur_item = region; 1706 } else { 1707 cur_item->next = region; 1708 cur_item = region; 1709 } 1710 } 1711 1712 return head; 1713 } 1714 1715 static PciBridgeInfo *qmp_query_pci_bridge(PCIDevice *dev, PCIBus *bus, 1716 int bus_num) 1717 { 1718 PciBridgeInfo *info; 1719 PciMemoryRange *range; 1720 1721 info = g_new0(PciBridgeInfo, 1); 1722 1723 info->bus = g_new0(PciBusInfo, 1); 1724 info->bus->number = dev->config[PCI_PRIMARY_BUS]; 1725 info->bus->secondary = dev->config[PCI_SECONDARY_BUS]; 1726 info->bus->subordinate = dev->config[PCI_SUBORDINATE_BUS]; 1727 1728 range = info->bus->io_range = g_new0(PciMemoryRange, 1); 1729 range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_IO); 1730 range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_IO); 1731 1732 range = info->bus->memory_range = g_new0(PciMemoryRange, 1); 1733 range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_MEMORY); 1734 range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_MEMORY); 1735 1736 range = info->bus->prefetchable_range = g_new0(PciMemoryRange, 1); 1737 range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH); 1738 range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH); 1739 1740 if (dev->config[PCI_SECONDARY_BUS] != 0) { 1741 PCIBus *child_bus = pci_find_bus_nr(bus, dev->config[PCI_SECONDARY_BUS]); 1742 if (child_bus) { 1743 info->has_devices = true; 1744 info->devices = qmp_query_pci_devices(child_bus, dev->config[PCI_SECONDARY_BUS]); 1745 } 1746 } 1747 1748 return info; 1749 } 1750 1751 static PciDeviceInfo *qmp_query_pci_device(PCIDevice *dev, PCIBus *bus, 1752 int bus_num) 1753 { 1754 const pci_class_desc *desc; 1755 PciDeviceInfo *info; 1756 uint8_t type; 1757 int class; 1758 1759 info = g_new0(PciDeviceInfo, 1); 1760 info->bus = bus_num; 1761 info->slot = PCI_SLOT(dev->devfn); 1762 info->function = PCI_FUNC(dev->devfn); 1763 1764 info->class_info = g_new0(PciDeviceClass, 1); 1765 class = pci_get_word(dev->config + PCI_CLASS_DEVICE); 1766 info->class_info->q_class = class; 1767 desc = get_class_desc(class); 1768 if (desc->desc) { 1769 info->class_info->has_desc = true; 1770 info->class_info->desc = g_strdup(desc->desc); 1771 } 1772 1773 info->id = g_new0(PciDeviceId, 1); 1774 info->id->vendor = pci_get_word(dev->config + PCI_VENDOR_ID); 1775 info->id->device = pci_get_word(dev->config + PCI_DEVICE_ID); 1776 info->regions = qmp_query_pci_regions(dev); 1777 info->qdev_id = g_strdup(dev->qdev.id ? dev->qdev.id : ""); 1778 1779 info->irq_pin = dev->config[PCI_INTERRUPT_PIN]; 1780 if (dev->config[PCI_INTERRUPT_PIN] != 0) { 1781 info->has_irq = true; 1782 info->irq = dev->config[PCI_INTERRUPT_LINE]; 1783 } 1784 1785 type = dev->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION; 1786 if (type == PCI_HEADER_TYPE_BRIDGE) { 1787 info->has_pci_bridge = true; 1788 info->pci_bridge = qmp_query_pci_bridge(dev, bus, bus_num); 1789 } else if (type == PCI_HEADER_TYPE_NORMAL) { 1790 info->id->has_subsystem = info->id->has_subsystem_vendor = true; 1791 info->id->subsystem = pci_get_word(dev->config + PCI_SUBSYSTEM_ID); 1792 info->id->subsystem_vendor = 1793 pci_get_word(dev->config + PCI_SUBSYSTEM_VENDOR_ID); 1794 } else if (type == PCI_HEADER_TYPE_CARDBUS) { 1795 info->id->has_subsystem = info->id->has_subsystem_vendor = true; 1796 info->id->subsystem = pci_get_word(dev->config + PCI_CB_SUBSYSTEM_ID); 1797 info->id->subsystem_vendor = 1798 pci_get_word(dev->config + PCI_CB_SUBSYSTEM_VENDOR_ID); 1799 } 1800 1801 return info; 1802 } 1803 1804 static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num) 1805 { 1806 PciDeviceInfoList *info, *head = NULL, *cur_item = NULL; 1807 PCIDevice *dev; 1808 int devfn; 1809 1810 for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { 1811 dev = bus->devices[devfn]; 1812 if (dev) { 1813 info = g_malloc0(sizeof(*info)); 1814 info->value = qmp_query_pci_device(dev, bus, bus_num); 1815 1816 /* XXX: waiting for the qapi to support GSList */ 1817 if (!cur_item) { 1818 head = cur_item = info; 1819 } else { 1820 cur_item->next = info; 1821 cur_item = info; 1822 } 1823 } 1824 } 1825 1826 return head; 1827 } 1828 1829 static PciInfo *qmp_query_pci_bus(PCIBus *bus, int bus_num) 1830 { 1831 PciInfo *info = NULL; 1832 1833 bus = pci_find_bus_nr(bus, bus_num); 1834 if (bus) { 1835 info = g_malloc0(sizeof(*info)); 1836 info->bus = bus_num; 1837 info->devices = qmp_query_pci_devices(bus, bus_num); 1838 } 1839 1840 return info; 1841 } 1842 1843 PciInfoList *qmp_query_pci(Error **errp) 1844 { 1845 PciInfoList *info, *head = NULL, *cur_item = NULL; 1846 PCIHostState *host_bridge; 1847 1848 QLIST_FOREACH(host_bridge, &pci_host_bridges, next) { 1849 info = g_malloc0(sizeof(*info)); 1850 info->value = qmp_query_pci_bus(host_bridge->bus, 1851 pci_bus_num(host_bridge->bus)); 1852 1853 /* XXX: waiting for the qapi to support GSList */ 1854 if (!cur_item) { 1855 head = cur_item = info; 1856 } else { 1857 cur_item->next = info; 1858 cur_item = info; 1859 } 1860 } 1861 1862 return head; 1863 } 1864 1865 /* Initialize a PCI NIC. */ 1866 PCIDevice *pci_nic_init_nofail(NICInfo *nd, PCIBus *rootbus, 1867 const char *default_model, 1868 const char *default_devaddr) 1869 { 1870 const char *devaddr = nd->devaddr ? nd->devaddr : default_devaddr; 1871 GSList *list; 1872 GPtrArray *pci_nic_models; 1873 PCIBus *bus; 1874 PCIDevice *pci_dev; 1875 DeviceState *dev; 1876 int devfn; 1877 int i; 1878 int dom, busnr; 1879 unsigned slot; 1880 1881 if (nd->model && !strcmp(nd->model, "virtio")) { 1882 g_free(nd->model); 1883 nd->model = g_strdup("virtio-net-pci"); 1884 } 1885 1886 list = object_class_get_list_sorted(TYPE_PCI_DEVICE, false); 1887 pci_nic_models = g_ptr_array_new(); 1888 while (list) { 1889 DeviceClass *dc = OBJECT_CLASS_CHECK(DeviceClass, list->data, 1890 TYPE_DEVICE); 1891 GSList *next; 1892 if (test_bit(DEVICE_CATEGORY_NETWORK, dc->categories) && 1893 dc->user_creatable) { 1894 const char *name = object_class_get_name(list->data); 1895 /* 1896 * A network device might also be something else than a NIC, see 1897 * e.g. the "rocker" device. Thus we have to look for the "netdev" 1898 * property, too. Unfortunately, some devices like virtio-net only 1899 * create this property during instance_init, so we have to create 1900 * a temporary instance here to be able to check it. 1901 */ 1902 Object *obj = object_new_with_class(OBJECT_CLASS(dc)); 1903 if (object_property_find(obj, "netdev", NULL)) { 1904 g_ptr_array_add(pci_nic_models, (gpointer)name); 1905 } 1906 object_unref(obj); 1907 } 1908 next = list->next; 1909 g_slist_free_1(list); 1910 list = next; 1911 } 1912 g_ptr_array_add(pci_nic_models, NULL); 1913 1914 if (qemu_show_nic_models(nd->model, (const char **)pci_nic_models->pdata)) { 1915 exit(0); 1916 } 1917 1918 i = qemu_find_nic_model(nd, (const char **)pci_nic_models->pdata, 1919 default_model); 1920 if (i < 0) { 1921 exit(1); 1922 } 1923 1924 if (!rootbus) { 1925 error_report("No primary PCI bus"); 1926 exit(1); 1927 } 1928 1929 assert(!rootbus->parent_dev); 1930 1931 if (!devaddr) { 1932 devfn = -1; 1933 busnr = 0; 1934 } else { 1935 if (pci_parse_devaddr(devaddr, &dom, &busnr, &slot, NULL) < 0) { 1936 error_report("Invalid PCI device address %s for device %s", 1937 devaddr, nd->model); 1938 exit(1); 1939 } 1940 1941 if (dom != 0) { 1942 error_report("No support for non-zero PCI domains"); 1943 exit(1); 1944 } 1945 1946 devfn = PCI_DEVFN(slot, 0); 1947 } 1948 1949 bus = pci_find_bus_nr(rootbus, busnr); 1950 if (!bus) { 1951 error_report("Invalid PCI device address %s for device %s", 1952 devaddr, nd->model); 1953 exit(1); 1954 } 1955 1956 pci_dev = pci_new(devfn, nd->model); 1957 dev = &pci_dev->qdev; 1958 qdev_set_nic_properties(dev, nd); 1959 pci_realize_and_unref(pci_dev, bus, &error_fatal); 1960 g_ptr_array_free(pci_nic_models, true); 1961 return pci_dev; 1962 } 1963 1964 PCIDevice *pci_vga_init(PCIBus *bus) 1965 { 1966 switch (vga_interface_type) { 1967 case VGA_CIRRUS: 1968 return pci_create_simple(bus, -1, "cirrus-vga"); 1969 case VGA_QXL: 1970 return pci_create_simple(bus, -1, "qxl-vga"); 1971 case VGA_STD: 1972 return pci_create_simple(bus, -1, "VGA"); 1973 case VGA_VMWARE: 1974 return pci_create_simple(bus, -1, "vmware-svga"); 1975 case VGA_VIRTIO: 1976 return pci_create_simple(bus, -1, "virtio-vga"); 1977 case VGA_NONE: 1978 default: /* Other non-PCI types. Checking for unsupported types is already 1979 done in vl.c. */ 1980 return NULL; 1981 } 1982 } 1983 1984 /* Whether a given bus number is in range of the secondary 1985 * bus of the given bridge device. */ 1986 static bool pci_secondary_bus_in_range(PCIDevice *dev, int bus_num) 1987 { 1988 return !(pci_get_word(dev->config + PCI_BRIDGE_CONTROL) & 1989 PCI_BRIDGE_CTL_BUS_RESET) /* Don't walk the bus if it's reset. */ && 1990 dev->config[PCI_SECONDARY_BUS] <= bus_num && 1991 bus_num <= dev->config[PCI_SUBORDINATE_BUS]; 1992 } 1993 1994 /* Whether a given bus number is in a range of a root bus */ 1995 static bool pci_root_bus_in_range(PCIBus *bus, int bus_num) 1996 { 1997 int i; 1998 1999 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { 2000 PCIDevice *dev = bus->devices[i]; 2001 2002 if (dev && PCI_DEVICE_GET_CLASS(dev)->is_bridge) { 2003 if (pci_secondary_bus_in_range(dev, bus_num)) { 2004 return true; 2005 } 2006 } 2007 } 2008 2009 return false; 2010 } 2011 2012 static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num) 2013 { 2014 PCIBus *sec; 2015 2016 if (!bus) { 2017 return NULL; 2018 } 2019 2020 if (pci_bus_num(bus) == bus_num) { 2021 return bus; 2022 } 2023 2024 /* Consider all bus numbers in range for the host pci bridge. */ 2025 if (!pci_bus_is_root(bus) && 2026 !pci_secondary_bus_in_range(bus->parent_dev, bus_num)) { 2027 return NULL; 2028 } 2029 2030 /* try child bus */ 2031 for (; bus; bus = sec) { 2032 QLIST_FOREACH(sec, &bus->child, sibling) { 2033 if (pci_bus_num(sec) == bus_num) { 2034 return sec; 2035 } 2036 /* PXB buses assumed to be children of bus 0 */ 2037 if (pci_bus_is_root(sec)) { 2038 if (pci_root_bus_in_range(sec, bus_num)) { 2039 break; 2040 } 2041 } else { 2042 if (pci_secondary_bus_in_range(sec->parent_dev, bus_num)) { 2043 break; 2044 } 2045 } 2046 } 2047 } 2048 2049 return NULL; 2050 } 2051 2052 void pci_for_each_bus_depth_first(PCIBus *bus, 2053 void *(*begin)(PCIBus *bus, void *parent_state), 2054 void (*end)(PCIBus *bus, void *state), 2055 void *parent_state) 2056 { 2057 PCIBus *sec; 2058 void *state; 2059 2060 if (!bus) { 2061 return; 2062 } 2063 2064 if (begin) { 2065 state = begin(bus, parent_state); 2066 } else { 2067 state = parent_state; 2068 } 2069 2070 QLIST_FOREACH(sec, &bus->child, sibling) { 2071 pci_for_each_bus_depth_first(sec, begin, end, state); 2072 } 2073 2074 if (end) { 2075 end(bus, state); 2076 } 2077 } 2078 2079 2080 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn) 2081 { 2082 bus = pci_find_bus_nr(bus, bus_num); 2083 2084 if (!bus) 2085 return NULL; 2086 2087 return bus->devices[devfn]; 2088 } 2089 2090 static void pci_qdev_realize(DeviceState *qdev, Error **errp) 2091 { 2092 PCIDevice *pci_dev = (PCIDevice *)qdev; 2093 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev); 2094 ObjectClass *klass = OBJECT_CLASS(pc); 2095 Error *local_err = NULL; 2096 bool is_default_rom; 2097 uint16_t class_id; 2098 2099 /* initialize cap_present for pci_is_express() and pci_config_size(), 2100 * Note that hybrid PCIs are not set automatically and need to manage 2101 * QEMU_PCI_CAP_EXPRESS manually */ 2102 if (object_class_dynamic_cast(klass, INTERFACE_PCIE_DEVICE) && 2103 !object_class_dynamic_cast(klass, INTERFACE_CONVENTIONAL_PCI_DEVICE)) { 2104 pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS; 2105 } 2106 2107 pci_dev = do_pci_register_device(pci_dev, 2108 object_get_typename(OBJECT(qdev)), 2109 pci_dev->devfn, errp); 2110 if (pci_dev == NULL) 2111 return; 2112 2113 if (pc->realize) { 2114 pc->realize(pci_dev, &local_err); 2115 if (local_err) { 2116 error_propagate(errp, local_err); 2117 do_pci_unregister_device(pci_dev); 2118 return; 2119 } 2120 } 2121 2122 if (pci_dev->failover_pair_id) { 2123 if (!pci_bus_is_express(pci_get_bus(pci_dev))) { 2124 error_setg(errp, "failover primary device must be on " 2125 "PCIExpress bus"); 2126 pci_qdev_unrealize(DEVICE(pci_dev)); 2127 return; 2128 } 2129 class_id = pci_get_word(pci_dev->config + PCI_CLASS_DEVICE); 2130 if (class_id != PCI_CLASS_NETWORK_ETHERNET) { 2131 error_setg(errp, "failover primary device is not an " 2132 "Ethernet device"); 2133 pci_qdev_unrealize(DEVICE(pci_dev)); 2134 return; 2135 } 2136 if (!(pci_dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) 2137 && (PCI_FUNC(pci_dev->devfn) == 0)) { 2138 qdev->allow_unplug_during_migration = true; 2139 } else { 2140 error_setg(errp, "failover: primary device must be in its own " 2141 "PCI slot"); 2142 pci_qdev_unrealize(DEVICE(pci_dev)); 2143 return; 2144 } 2145 qdev->allow_unplug_during_migration = true; 2146 } 2147 2148 /* rom loading */ 2149 is_default_rom = false; 2150 if (pci_dev->romfile == NULL && pc->romfile != NULL) { 2151 pci_dev->romfile = g_strdup(pc->romfile); 2152 is_default_rom = true; 2153 } 2154 2155 pci_add_option_rom(pci_dev, is_default_rom, &local_err); 2156 if (local_err) { 2157 error_propagate(errp, local_err); 2158 pci_qdev_unrealize(DEVICE(pci_dev)); 2159 return; 2160 } 2161 } 2162 2163 PCIDevice *pci_new_multifunction(int devfn, bool multifunction, 2164 const char *name) 2165 { 2166 DeviceState *dev; 2167 2168 dev = qdev_new(name); 2169 qdev_prop_set_int32(dev, "addr", devfn); 2170 qdev_prop_set_bit(dev, "multifunction", multifunction); 2171 return PCI_DEVICE(dev); 2172 } 2173 2174 PCIDevice *pci_new(int devfn, const char *name) 2175 { 2176 return pci_new_multifunction(devfn, false, name); 2177 } 2178 2179 bool pci_realize_and_unref(PCIDevice *dev, PCIBus *bus, Error **errp) 2180 { 2181 return qdev_realize_and_unref(&dev->qdev, &bus->qbus, errp); 2182 } 2183 2184 PCIDevice *pci_create_simple_multifunction(PCIBus *bus, int devfn, 2185 bool multifunction, 2186 const char *name) 2187 { 2188 PCIDevice *dev = pci_new_multifunction(devfn, multifunction, name); 2189 pci_realize_and_unref(dev, bus, &error_fatal); 2190 return dev; 2191 } 2192 2193 PCIDevice *pci_create_simple(PCIBus *bus, int devfn, const char *name) 2194 { 2195 return pci_create_simple_multifunction(bus, devfn, false, name); 2196 } 2197 2198 static uint8_t pci_find_space(PCIDevice *pdev, uint8_t size) 2199 { 2200 int offset = PCI_CONFIG_HEADER_SIZE; 2201 int i; 2202 for (i = PCI_CONFIG_HEADER_SIZE; i < PCI_CONFIG_SPACE_SIZE; ++i) { 2203 if (pdev->used[i]) 2204 offset = i + 1; 2205 else if (i - offset + 1 == size) 2206 return offset; 2207 } 2208 return 0; 2209 } 2210 2211 static uint8_t pci_find_capability_list(PCIDevice *pdev, uint8_t cap_id, 2212 uint8_t *prev_p) 2213 { 2214 uint8_t next, prev; 2215 2216 if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST)) 2217 return 0; 2218 2219 for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]); 2220 prev = next + PCI_CAP_LIST_NEXT) 2221 if (pdev->config[next + PCI_CAP_LIST_ID] == cap_id) 2222 break; 2223 2224 if (prev_p) 2225 *prev_p = prev; 2226 return next; 2227 } 2228 2229 static uint8_t pci_find_capability_at_offset(PCIDevice *pdev, uint8_t offset) 2230 { 2231 uint8_t next, prev, found = 0; 2232 2233 if (!(pdev->used[offset])) { 2234 return 0; 2235 } 2236 2237 assert(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST); 2238 2239 for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]); 2240 prev = next + PCI_CAP_LIST_NEXT) { 2241 if (next <= offset && next > found) { 2242 found = next; 2243 } 2244 } 2245 return found; 2246 } 2247 2248 /* Patch the PCI vendor and device ids in a PCI rom image if necessary. 2249 This is needed for an option rom which is used for more than one device. */ 2250 static void pci_patch_ids(PCIDevice *pdev, uint8_t *ptr, int size) 2251 { 2252 uint16_t vendor_id; 2253 uint16_t device_id; 2254 uint16_t rom_vendor_id; 2255 uint16_t rom_device_id; 2256 uint16_t rom_magic; 2257 uint16_t pcir_offset; 2258 uint8_t checksum; 2259 2260 /* Words in rom data are little endian (like in PCI configuration), 2261 so they can be read / written with pci_get_word / pci_set_word. */ 2262 2263 /* Only a valid rom will be patched. */ 2264 rom_magic = pci_get_word(ptr); 2265 if (rom_magic != 0xaa55) { 2266 PCI_DPRINTF("Bad ROM magic %04x\n", rom_magic); 2267 return; 2268 } 2269 pcir_offset = pci_get_word(ptr + 0x18); 2270 if (pcir_offset + 8 >= size || memcmp(ptr + pcir_offset, "PCIR", 4)) { 2271 PCI_DPRINTF("Bad PCIR offset 0x%x or signature\n", pcir_offset); 2272 return; 2273 } 2274 2275 vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID); 2276 device_id = pci_get_word(pdev->config + PCI_DEVICE_ID); 2277 rom_vendor_id = pci_get_word(ptr + pcir_offset + 4); 2278 rom_device_id = pci_get_word(ptr + pcir_offset + 6); 2279 2280 PCI_DPRINTF("%s: ROM id %04x%04x / PCI id %04x%04x\n", pdev->romfile, 2281 vendor_id, device_id, rom_vendor_id, rom_device_id); 2282 2283 checksum = ptr[6]; 2284 2285 if (vendor_id != rom_vendor_id) { 2286 /* Patch vendor id and checksum (at offset 6 for etherboot roms). */ 2287 checksum += (uint8_t)rom_vendor_id + (uint8_t)(rom_vendor_id >> 8); 2288 checksum -= (uint8_t)vendor_id + (uint8_t)(vendor_id >> 8); 2289 PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum); 2290 ptr[6] = checksum; 2291 pci_set_word(ptr + pcir_offset + 4, vendor_id); 2292 } 2293 2294 if (device_id != rom_device_id) { 2295 /* Patch device id and checksum (at offset 6 for etherboot roms). */ 2296 checksum += (uint8_t)rom_device_id + (uint8_t)(rom_device_id >> 8); 2297 checksum -= (uint8_t)device_id + (uint8_t)(device_id >> 8); 2298 PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum); 2299 ptr[6] = checksum; 2300 pci_set_word(ptr + pcir_offset + 6, device_id); 2301 } 2302 } 2303 2304 /* Add an option rom for the device */ 2305 static void pci_add_option_rom(PCIDevice *pdev, bool is_default_rom, 2306 Error **errp) 2307 { 2308 int size; 2309 char *path; 2310 void *ptr; 2311 char name[32]; 2312 const VMStateDescription *vmsd; 2313 2314 if (!pdev->romfile) 2315 return; 2316 if (strlen(pdev->romfile) == 0) 2317 return; 2318 2319 if (!pdev->rom_bar) { 2320 /* 2321 * Load rom via fw_cfg instead of creating a rom bar, 2322 * for 0.11 compatibility. 2323 */ 2324 int class = pci_get_word(pdev->config + PCI_CLASS_DEVICE); 2325 2326 /* 2327 * Hot-plugged devices can't use the option ROM 2328 * if the rom bar is disabled. 2329 */ 2330 if (DEVICE(pdev)->hotplugged) { 2331 error_setg(errp, "Hot-plugged device without ROM bar" 2332 " can't have an option ROM"); 2333 return; 2334 } 2335 2336 if (class == 0x0300) { 2337 rom_add_vga(pdev->romfile); 2338 } else { 2339 rom_add_option(pdev->romfile, -1); 2340 } 2341 return; 2342 } 2343 2344 path = qemu_find_file(QEMU_FILE_TYPE_BIOS, pdev->romfile); 2345 if (path == NULL) { 2346 path = g_strdup(pdev->romfile); 2347 } 2348 2349 size = get_image_size(path); 2350 if (size < 0) { 2351 error_setg(errp, "failed to find romfile \"%s\"", pdev->romfile); 2352 g_free(path); 2353 return; 2354 } else if (size == 0) { 2355 error_setg(errp, "romfile \"%s\" is empty", pdev->romfile); 2356 g_free(path); 2357 return; 2358 } 2359 size = pow2ceil(size); 2360 2361 vmsd = qdev_get_vmsd(DEVICE(pdev)); 2362 2363 if (vmsd) { 2364 snprintf(name, sizeof(name), "%s.rom", vmsd->name); 2365 } else { 2366 snprintf(name, sizeof(name), "%s.rom", object_get_typename(OBJECT(pdev))); 2367 } 2368 pdev->has_rom = true; 2369 memory_region_init_rom(&pdev->rom, OBJECT(pdev), name, size, &error_fatal); 2370 ptr = memory_region_get_ram_ptr(&pdev->rom); 2371 if (load_image_size(path, ptr, size) < 0) { 2372 error_setg(errp, "failed to load romfile \"%s\"", pdev->romfile); 2373 g_free(path); 2374 return; 2375 } 2376 g_free(path); 2377 2378 if (is_default_rom) { 2379 /* Only the default rom images will be patched (if needed). */ 2380 pci_patch_ids(pdev, ptr, size); 2381 } 2382 2383 pci_register_bar(pdev, PCI_ROM_SLOT, 0, &pdev->rom); 2384 } 2385 2386 static void pci_del_option_rom(PCIDevice *pdev) 2387 { 2388 if (!pdev->has_rom) 2389 return; 2390 2391 vmstate_unregister_ram(&pdev->rom, &pdev->qdev); 2392 pdev->has_rom = false; 2393 } 2394 2395 /* 2396 * On success, pci_add_capability() returns a positive value 2397 * that the offset of the pci capability. 2398 * On failure, it sets an error and returns a negative error 2399 * code. 2400 */ 2401 int pci_add_capability(PCIDevice *pdev, uint8_t cap_id, 2402 uint8_t offset, uint8_t size, 2403 Error **errp) 2404 { 2405 uint8_t *config; 2406 int i, overlapping_cap; 2407 2408 if (!offset) { 2409 offset = pci_find_space(pdev, size); 2410 /* out of PCI config space is programming error */ 2411 assert(offset); 2412 } else { 2413 /* Verify that capabilities don't overlap. Note: device assignment 2414 * depends on this check to verify that the device is not broken. 2415 * Should never trigger for emulated devices, but it's helpful 2416 * for debugging these. */ 2417 for (i = offset; i < offset + size; i++) { 2418 overlapping_cap = pci_find_capability_at_offset(pdev, i); 2419 if (overlapping_cap) { 2420 error_setg(errp, "%s:%02x:%02x.%x " 2421 "Attempt to add PCI capability %x at offset " 2422 "%x overlaps existing capability %x at offset %x", 2423 pci_root_bus_path(pdev), pci_dev_bus_num(pdev), 2424 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), 2425 cap_id, offset, overlapping_cap, i); 2426 return -EINVAL; 2427 } 2428 } 2429 } 2430 2431 config = pdev->config + offset; 2432 config[PCI_CAP_LIST_ID] = cap_id; 2433 config[PCI_CAP_LIST_NEXT] = pdev->config[PCI_CAPABILITY_LIST]; 2434 pdev->config[PCI_CAPABILITY_LIST] = offset; 2435 pdev->config[PCI_STATUS] |= PCI_STATUS_CAP_LIST; 2436 memset(pdev->used + offset, 0xFF, QEMU_ALIGN_UP(size, 4)); 2437 /* Make capability read-only by default */ 2438 memset(pdev->wmask + offset, 0, size); 2439 /* Check capability by default */ 2440 memset(pdev->cmask + offset, 0xFF, size); 2441 return offset; 2442 } 2443 2444 /* Unlink capability from the pci config space. */ 2445 void pci_del_capability(PCIDevice *pdev, uint8_t cap_id, uint8_t size) 2446 { 2447 uint8_t prev, offset = pci_find_capability_list(pdev, cap_id, &prev); 2448 if (!offset) 2449 return; 2450 pdev->config[prev] = pdev->config[offset + PCI_CAP_LIST_NEXT]; 2451 /* Make capability writable again */ 2452 memset(pdev->wmask + offset, 0xff, size); 2453 memset(pdev->w1cmask + offset, 0, size); 2454 /* Clear cmask as device-specific registers can't be checked */ 2455 memset(pdev->cmask + offset, 0, size); 2456 memset(pdev->used + offset, 0, QEMU_ALIGN_UP(size, 4)); 2457 2458 if (!pdev->config[PCI_CAPABILITY_LIST]) 2459 pdev->config[PCI_STATUS] &= ~PCI_STATUS_CAP_LIST; 2460 } 2461 2462 uint8_t pci_find_capability(PCIDevice *pdev, uint8_t cap_id) 2463 { 2464 return pci_find_capability_list(pdev, cap_id, NULL); 2465 } 2466 2467 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent) 2468 { 2469 PCIDevice *d = (PCIDevice *)dev; 2470 const pci_class_desc *desc; 2471 char ctxt[64]; 2472 PCIIORegion *r; 2473 int i, class; 2474 2475 class = pci_get_word(d->config + PCI_CLASS_DEVICE); 2476 desc = pci_class_descriptions; 2477 while (desc->desc && class != desc->class) 2478 desc++; 2479 if (desc->desc) { 2480 snprintf(ctxt, sizeof(ctxt), "%s", desc->desc); 2481 } else { 2482 snprintf(ctxt, sizeof(ctxt), "Class %04x", class); 2483 } 2484 2485 monitor_printf(mon, "%*sclass %s, addr %02x:%02x.%x, " 2486 "pci id %04x:%04x (sub %04x:%04x)\n", 2487 indent, "", ctxt, pci_dev_bus_num(d), 2488 PCI_SLOT(d->devfn), PCI_FUNC(d->devfn), 2489 pci_get_word(d->config + PCI_VENDOR_ID), 2490 pci_get_word(d->config + PCI_DEVICE_ID), 2491 pci_get_word(d->config + PCI_SUBSYSTEM_VENDOR_ID), 2492 pci_get_word(d->config + PCI_SUBSYSTEM_ID)); 2493 for (i = 0; i < PCI_NUM_REGIONS; i++) { 2494 r = &d->io_regions[i]; 2495 if (!r->size) 2496 continue; 2497 monitor_printf(mon, "%*sbar %d: %s at 0x%"FMT_PCIBUS 2498 " [0x%"FMT_PCIBUS"]\n", 2499 indent, "", 2500 i, r->type & PCI_BASE_ADDRESS_SPACE_IO ? "i/o" : "mem", 2501 r->addr, r->addr + r->size - 1); 2502 } 2503 } 2504 2505 static char *pci_dev_fw_name(DeviceState *dev, char *buf, int len) 2506 { 2507 PCIDevice *d = (PCIDevice *)dev; 2508 const char *name = NULL; 2509 const pci_class_desc *desc = pci_class_descriptions; 2510 int class = pci_get_word(d->config + PCI_CLASS_DEVICE); 2511 2512 while (desc->desc && 2513 (class & ~desc->fw_ign_bits) != 2514 (desc->class & ~desc->fw_ign_bits)) { 2515 desc++; 2516 } 2517 2518 if (desc->desc) { 2519 name = desc->fw_name; 2520 } 2521 2522 if (name) { 2523 pstrcpy(buf, len, name); 2524 } else { 2525 snprintf(buf, len, "pci%04x,%04x", 2526 pci_get_word(d->config + PCI_VENDOR_ID), 2527 pci_get_word(d->config + PCI_DEVICE_ID)); 2528 } 2529 2530 return buf; 2531 } 2532 2533 static char *pcibus_get_fw_dev_path(DeviceState *dev) 2534 { 2535 PCIDevice *d = (PCIDevice *)dev; 2536 char path[50], name[33]; 2537 int off; 2538 2539 off = snprintf(path, sizeof(path), "%s@%x", 2540 pci_dev_fw_name(dev, name, sizeof name), 2541 PCI_SLOT(d->devfn)); 2542 if (PCI_FUNC(d->devfn)) 2543 snprintf(path + off, sizeof(path) + off, ",%x", PCI_FUNC(d->devfn)); 2544 return g_strdup(path); 2545 } 2546 2547 static char *pcibus_get_dev_path(DeviceState *dev) 2548 { 2549 PCIDevice *d = container_of(dev, PCIDevice, qdev); 2550 PCIDevice *t; 2551 int slot_depth; 2552 /* Path format: Domain:00:Slot.Function:Slot.Function....:Slot.Function. 2553 * 00 is added here to make this format compatible with 2554 * domain:Bus:Slot.Func for systems without nested PCI bridges. 2555 * Slot.Function list specifies the slot and function numbers for all 2556 * devices on the path from root to the specific device. */ 2557 const char *root_bus_path; 2558 int root_bus_len; 2559 char slot[] = ":SS.F"; 2560 int slot_len = sizeof slot - 1 /* For '\0' */; 2561 int path_len; 2562 char *path, *p; 2563 int s; 2564 2565 root_bus_path = pci_root_bus_path(d); 2566 root_bus_len = strlen(root_bus_path); 2567 2568 /* Calculate # of slots on path between device and root. */; 2569 slot_depth = 0; 2570 for (t = d; t; t = pci_get_bus(t)->parent_dev) { 2571 ++slot_depth; 2572 } 2573 2574 path_len = root_bus_len + slot_len * slot_depth; 2575 2576 /* Allocate memory, fill in the terminating null byte. */ 2577 path = g_malloc(path_len + 1 /* For '\0' */); 2578 path[path_len] = '\0'; 2579 2580 memcpy(path, root_bus_path, root_bus_len); 2581 2582 /* Fill in slot numbers. We walk up from device to root, so need to print 2583 * them in the reverse order, last to first. */ 2584 p = path + path_len; 2585 for (t = d; t; t = pci_get_bus(t)->parent_dev) { 2586 p -= slot_len; 2587 s = snprintf(slot, sizeof slot, ":%02x.%x", 2588 PCI_SLOT(t->devfn), PCI_FUNC(t->devfn)); 2589 assert(s == slot_len); 2590 memcpy(p, slot, slot_len); 2591 } 2592 2593 return path; 2594 } 2595 2596 static int pci_qdev_find_recursive(PCIBus *bus, 2597 const char *id, PCIDevice **pdev) 2598 { 2599 DeviceState *qdev = qdev_find_recursive(&bus->qbus, id); 2600 if (!qdev) { 2601 return -ENODEV; 2602 } 2603 2604 /* roughly check if given qdev is pci device */ 2605 if (object_dynamic_cast(OBJECT(qdev), TYPE_PCI_DEVICE)) { 2606 *pdev = PCI_DEVICE(qdev); 2607 return 0; 2608 } 2609 return -EINVAL; 2610 } 2611 2612 int pci_qdev_find_device(const char *id, PCIDevice **pdev) 2613 { 2614 PCIHostState *host_bridge; 2615 int rc = -ENODEV; 2616 2617 QLIST_FOREACH(host_bridge, &pci_host_bridges, next) { 2618 int tmp = pci_qdev_find_recursive(host_bridge->bus, id, pdev); 2619 if (!tmp) { 2620 rc = 0; 2621 break; 2622 } 2623 if (tmp != -ENODEV) { 2624 rc = tmp; 2625 } 2626 } 2627 2628 return rc; 2629 } 2630 2631 MemoryRegion *pci_address_space(PCIDevice *dev) 2632 { 2633 return pci_get_bus(dev)->address_space_mem; 2634 } 2635 2636 MemoryRegion *pci_address_space_io(PCIDevice *dev) 2637 { 2638 return pci_get_bus(dev)->address_space_io; 2639 } 2640 2641 static void pci_device_class_init(ObjectClass *klass, void *data) 2642 { 2643 DeviceClass *k = DEVICE_CLASS(klass); 2644 2645 k->realize = pci_qdev_realize; 2646 k->unrealize = pci_qdev_unrealize; 2647 k->bus_type = TYPE_PCI_BUS; 2648 device_class_set_props(k, pci_props); 2649 } 2650 2651 static void pci_device_class_base_init(ObjectClass *klass, void *data) 2652 { 2653 if (!object_class_is_abstract(klass)) { 2654 ObjectClass *conventional = 2655 object_class_dynamic_cast(klass, INTERFACE_CONVENTIONAL_PCI_DEVICE); 2656 ObjectClass *pcie = 2657 object_class_dynamic_cast(klass, INTERFACE_PCIE_DEVICE); 2658 assert(conventional || pcie); 2659 } 2660 } 2661 2662 AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) 2663 { 2664 PCIBus *bus = pci_get_bus(dev); 2665 PCIBus *iommu_bus = bus; 2666 uint8_t devfn = dev->devfn; 2667 2668 while (iommu_bus && !iommu_bus->iommu_fn && iommu_bus->parent_dev) { 2669 PCIBus *parent_bus = pci_get_bus(iommu_bus->parent_dev); 2670 2671 /* 2672 * The requester ID of the provided device may be aliased, as seen from 2673 * the IOMMU, due to topology limitations. The IOMMU relies on a 2674 * requester ID to provide a unique AddressSpace for devices, but 2675 * conventional PCI buses pre-date such concepts. Instead, the PCIe- 2676 * to-PCI bridge creates and accepts transactions on behalf of down- 2677 * stream devices. When doing so, all downstream devices are masked 2678 * (aliased) behind a single requester ID. The requester ID used 2679 * depends on the format of the bridge devices. Proper PCIe-to-PCI 2680 * bridges, with a PCIe capability indicating such, follow the 2681 * guidelines of chapter 2.3 of the PCIe-to-PCI/X bridge specification, 2682 * where the bridge uses the seconary bus as the bridge portion of the 2683 * requester ID and devfn of 00.0. For other bridges, typically those 2684 * found on the root complex such as the dmi-to-pci-bridge, we follow 2685 * the convention of typical bare-metal hardware, which uses the 2686 * requester ID of the bridge itself. There are device specific 2687 * exceptions to these rules, but these are the defaults that the 2688 * Linux kernel uses when determining DMA aliases itself and believed 2689 * to be true for the bare metal equivalents of the devices emulated 2690 * in QEMU. 2691 */ 2692 if (!pci_bus_is_express(iommu_bus)) { 2693 PCIDevice *parent = iommu_bus->parent_dev; 2694 2695 if (pci_is_express(parent) && 2696 pcie_cap_get_type(parent) == PCI_EXP_TYPE_PCI_BRIDGE) { 2697 devfn = PCI_DEVFN(0, 0); 2698 bus = iommu_bus; 2699 } else { 2700 devfn = parent->devfn; 2701 bus = parent_bus; 2702 } 2703 } 2704 2705 iommu_bus = parent_bus; 2706 } 2707 if (iommu_bus && iommu_bus->iommu_fn) { 2708 return iommu_bus->iommu_fn(bus, iommu_bus->iommu_opaque, devfn); 2709 } 2710 return &address_space_memory; 2711 } 2712 2713 void pci_setup_iommu(PCIBus *bus, PCIIOMMUFunc fn, void *opaque) 2714 { 2715 bus->iommu_fn = fn; 2716 bus->iommu_opaque = opaque; 2717 } 2718 2719 static void pci_dev_get_w64(PCIBus *b, PCIDevice *dev, void *opaque) 2720 { 2721 Range *range = opaque; 2722 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev); 2723 uint16_t cmd = pci_get_word(dev->config + PCI_COMMAND); 2724 int i; 2725 2726 if (!(cmd & PCI_COMMAND_MEMORY)) { 2727 return; 2728 } 2729 2730 if (pc->is_bridge) { 2731 pcibus_t base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH); 2732 pcibus_t limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH); 2733 2734 base = MAX(base, 0x1ULL << 32); 2735 2736 if (limit >= base) { 2737 Range pref_range; 2738 range_set_bounds(&pref_range, base, limit); 2739 range_extend(range, &pref_range); 2740 } 2741 } 2742 for (i = 0; i < PCI_NUM_REGIONS; ++i) { 2743 PCIIORegion *r = &dev->io_regions[i]; 2744 pcibus_t lob, upb; 2745 Range region_range; 2746 2747 if (!r->size || 2748 (r->type & PCI_BASE_ADDRESS_SPACE_IO) || 2749 !(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64)) { 2750 continue; 2751 } 2752 2753 lob = pci_bar_address(dev, i, r->type, r->size); 2754 upb = lob + r->size - 1; 2755 if (lob == PCI_BAR_UNMAPPED) { 2756 continue; 2757 } 2758 2759 lob = MAX(lob, 0x1ULL << 32); 2760 2761 if (upb >= lob) { 2762 range_set_bounds(®ion_range, lob, upb); 2763 range_extend(range, ®ion_range); 2764 } 2765 } 2766 } 2767 2768 void pci_bus_get_w64_range(PCIBus *bus, Range *range) 2769 { 2770 range_make_empty(range); 2771 pci_for_each_device_under_bus(bus, pci_dev_get_w64, range); 2772 } 2773 2774 static bool pcie_has_upstream_port(PCIDevice *dev) 2775 { 2776 PCIDevice *parent_dev = pci_bridge_get_device(pci_get_bus(dev)); 2777 2778 /* Device associated with an upstream port. 2779 * As there are several types of these, it's easier to check the 2780 * parent device: upstream ports are always connected to 2781 * root or downstream ports. 2782 */ 2783 return parent_dev && 2784 pci_is_express(parent_dev) && 2785 parent_dev->exp.exp_cap && 2786 (pcie_cap_get_type(parent_dev) == PCI_EXP_TYPE_ROOT_PORT || 2787 pcie_cap_get_type(parent_dev) == PCI_EXP_TYPE_DOWNSTREAM); 2788 } 2789 2790 PCIDevice *pci_get_function_0(PCIDevice *pci_dev) 2791 { 2792 PCIBus *bus = pci_get_bus(pci_dev); 2793 2794 if(pcie_has_upstream_port(pci_dev)) { 2795 /* With an upstream PCIe port, we only support 1 device at slot 0 */ 2796 return bus->devices[0]; 2797 } else { 2798 /* Other bus types might support multiple devices at slots 0-31 */ 2799 return bus->devices[PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 0)]; 2800 } 2801 } 2802 2803 MSIMessage pci_get_msi_message(PCIDevice *dev, int vector) 2804 { 2805 MSIMessage msg; 2806 if (msix_enabled(dev)) { 2807 msg = msix_get_message(dev, vector); 2808 } else if (msi_enabled(dev)) { 2809 msg = msi_get_message(dev, vector); 2810 } else { 2811 /* Should never happen */ 2812 error_report("%s: unknown interrupt type", __func__); 2813 abort(); 2814 } 2815 return msg; 2816 } 2817 2818 static const TypeInfo pci_device_type_info = { 2819 .name = TYPE_PCI_DEVICE, 2820 .parent = TYPE_DEVICE, 2821 .instance_size = sizeof(PCIDevice), 2822 .abstract = true, 2823 .class_size = sizeof(PCIDeviceClass), 2824 .class_init = pci_device_class_init, 2825 .class_base_init = pci_device_class_base_init, 2826 }; 2827 2828 static void pci_register_types(void) 2829 { 2830 type_register_static(&pci_bus_info); 2831 type_register_static(&pcie_bus_info); 2832 type_register_static(&conventional_pci_interface_info); 2833 type_register_static(&pcie_interface_info); 2834 type_register_static(&pci_device_type_info); 2835 } 2836 2837 type_init(pci_register_types) 2838