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 "trace.h" 36 #include "hw/pci/msi.h" 37 #include "hw/pci/msix.h" 38 #include "exec/address-spaces.h" 39 #include "hw/hotplug.h" 40 41 //#define DEBUG_PCI 42 #ifdef DEBUG_PCI 43 # define PCI_DPRINTF(format, ...) printf(format, ## __VA_ARGS__) 44 #else 45 # define PCI_DPRINTF(format, ...) do { } while (0) 46 #endif 47 48 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent); 49 static char *pcibus_get_dev_path(DeviceState *dev); 50 static char *pcibus_get_fw_dev_path(DeviceState *dev); 51 static void pcibus_reset(BusState *qbus); 52 53 static Property pci_props[] = { 54 DEFINE_PROP_PCI_DEVFN("addr", PCIDevice, devfn, -1), 55 DEFINE_PROP_STRING("romfile", PCIDevice, romfile), 56 DEFINE_PROP_UINT32("rombar", PCIDevice, rom_bar, 1), 57 DEFINE_PROP_BIT("multifunction", PCIDevice, cap_present, 58 QEMU_PCI_CAP_MULTIFUNCTION_BITNR, false), 59 DEFINE_PROP_BIT("command_serr_enable", PCIDevice, cap_present, 60 QEMU_PCI_CAP_SERR_BITNR, true), 61 DEFINE_PROP_END_OF_LIST() 62 }; 63 64 static const VMStateDescription vmstate_pcibus = { 65 .name = "PCIBUS", 66 .version_id = 1, 67 .minimum_version_id = 1, 68 .fields = (VMStateField[]) { 69 VMSTATE_INT32_EQUAL(nirq, PCIBus), 70 VMSTATE_VARRAY_INT32(irq_count, PCIBus, 71 nirq, 0, vmstate_info_int32, 72 int32_t), 73 VMSTATE_END_OF_LIST() 74 } 75 }; 76 77 static void pci_bus_realize(BusState *qbus, Error **errp) 78 { 79 PCIBus *bus = PCI_BUS(qbus); 80 81 vmstate_register(NULL, -1, &vmstate_pcibus, bus); 82 } 83 84 static void pci_bus_unrealize(BusState *qbus, Error **errp) 85 { 86 PCIBus *bus = PCI_BUS(qbus); 87 88 vmstate_unregister(NULL, &vmstate_pcibus, bus); 89 } 90 91 static void pci_bus_class_init(ObjectClass *klass, void *data) 92 { 93 BusClass *k = BUS_CLASS(klass); 94 95 k->print_dev = pcibus_dev_print; 96 k->get_dev_path = pcibus_get_dev_path; 97 k->get_fw_dev_path = pcibus_get_fw_dev_path; 98 k->realize = pci_bus_realize; 99 k->unrealize = pci_bus_unrealize; 100 k->reset = pcibus_reset; 101 } 102 103 static const TypeInfo pci_bus_info = { 104 .name = TYPE_PCI_BUS, 105 .parent = TYPE_BUS, 106 .instance_size = sizeof(PCIBus), 107 .class_init = pci_bus_class_init, 108 }; 109 110 static const TypeInfo pcie_bus_info = { 111 .name = TYPE_PCIE_BUS, 112 .parent = TYPE_PCI_BUS, 113 }; 114 115 static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num); 116 static void pci_update_mappings(PCIDevice *d); 117 static void pci_irq_handler(void *opaque, int irq_num, int level); 118 static void pci_add_option_rom(PCIDevice *pdev, bool is_default_rom, Error **); 119 static void pci_del_option_rom(PCIDevice *pdev); 120 121 static uint16_t pci_default_sub_vendor_id = PCI_SUBVENDOR_ID_REDHAT_QUMRANET; 122 static uint16_t pci_default_sub_device_id = PCI_SUBDEVICE_ID_QEMU; 123 124 static QLIST_HEAD(, PCIHostState) pci_host_bridges; 125 126 static int pci_bar(PCIDevice *d, int reg) 127 { 128 uint8_t type; 129 130 if (reg != PCI_ROM_SLOT) 131 return PCI_BASE_ADDRESS_0 + reg * 4; 132 133 type = d->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION; 134 return type == PCI_HEADER_TYPE_BRIDGE ? PCI_ROM_ADDRESS1 : PCI_ROM_ADDRESS; 135 } 136 137 static inline int pci_irq_state(PCIDevice *d, int irq_num) 138 { 139 return (d->irq_state >> irq_num) & 0x1; 140 } 141 142 static inline void pci_set_irq_state(PCIDevice *d, int irq_num, int level) 143 { 144 d->irq_state &= ~(0x1 << irq_num); 145 d->irq_state |= level << irq_num; 146 } 147 148 static void pci_change_irq_level(PCIDevice *pci_dev, int irq_num, int change) 149 { 150 PCIBus *bus; 151 for (;;) { 152 bus = pci_dev->bus; 153 irq_num = bus->map_irq(pci_dev, irq_num); 154 if (bus->set_irq) 155 break; 156 pci_dev = bus->parent_dev; 157 } 158 bus->irq_count[irq_num] += change; 159 bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0); 160 } 161 162 int pci_bus_get_irq_level(PCIBus *bus, int irq_num) 163 { 164 assert(irq_num >= 0); 165 assert(irq_num < bus->nirq); 166 return !!bus->irq_count[irq_num]; 167 } 168 169 /* Update interrupt status bit in config space on interrupt 170 * state change. */ 171 static void pci_update_irq_status(PCIDevice *dev) 172 { 173 if (dev->irq_state) { 174 dev->config[PCI_STATUS] |= PCI_STATUS_INTERRUPT; 175 } else { 176 dev->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT; 177 } 178 } 179 180 void pci_device_deassert_intx(PCIDevice *dev) 181 { 182 int i; 183 for (i = 0; i < PCI_NUM_PINS; ++i) { 184 pci_irq_handler(dev, i, 0); 185 } 186 } 187 188 static void pci_do_device_reset(PCIDevice *dev) 189 { 190 int r; 191 192 pci_device_deassert_intx(dev); 193 assert(dev->irq_state == 0); 194 195 /* Clear all writable bits */ 196 pci_word_test_and_clear_mask(dev->config + PCI_COMMAND, 197 pci_get_word(dev->wmask + PCI_COMMAND) | 198 pci_get_word(dev->w1cmask + PCI_COMMAND)); 199 pci_word_test_and_clear_mask(dev->config + PCI_STATUS, 200 pci_get_word(dev->wmask + PCI_STATUS) | 201 pci_get_word(dev->w1cmask + PCI_STATUS)); 202 dev->config[PCI_CACHE_LINE_SIZE] = 0x0; 203 dev->config[PCI_INTERRUPT_LINE] = 0x0; 204 for (r = 0; r < PCI_NUM_REGIONS; ++r) { 205 PCIIORegion *region = &dev->io_regions[r]; 206 if (!region->size) { 207 continue; 208 } 209 210 if (!(region->type & PCI_BASE_ADDRESS_SPACE_IO) && 211 region->type & PCI_BASE_ADDRESS_MEM_TYPE_64) { 212 pci_set_quad(dev->config + pci_bar(dev, r), region->type); 213 } else { 214 pci_set_long(dev->config + pci_bar(dev, r), region->type); 215 } 216 } 217 pci_update_mappings(dev); 218 219 msi_reset(dev); 220 msix_reset(dev); 221 } 222 223 /* 224 * This function is called on #RST and FLR. 225 * FLR if PCI_EXP_DEVCTL_BCR_FLR is set 226 */ 227 void pci_device_reset(PCIDevice *dev) 228 { 229 qdev_reset_all(&dev->qdev); 230 pci_do_device_reset(dev); 231 } 232 233 /* 234 * Trigger pci bus reset under a given bus. 235 * Called via qbus_reset_all on RST# assert, after the devices 236 * have been reset qdev_reset_all-ed already. 237 */ 238 static void pcibus_reset(BusState *qbus) 239 { 240 PCIBus *bus = DO_UPCAST(PCIBus, qbus, qbus); 241 int i; 242 243 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { 244 if (bus->devices[i]) { 245 pci_do_device_reset(bus->devices[i]); 246 } 247 } 248 249 for (i = 0; i < bus->nirq; i++) { 250 assert(bus->irq_count[i] == 0); 251 } 252 } 253 254 static void pci_host_bus_register(PCIBus *bus, DeviceState *parent) 255 { 256 PCIHostState *host_bridge = PCI_HOST_BRIDGE(parent); 257 258 QLIST_INSERT_HEAD(&pci_host_bridges, host_bridge, next); 259 } 260 261 PCIBus *pci_find_primary_bus(void) 262 { 263 PCIBus *primary_bus = NULL; 264 PCIHostState *host; 265 266 QLIST_FOREACH(host, &pci_host_bridges, next) { 267 if (primary_bus) { 268 /* We have multiple root buses, refuse to select a primary */ 269 return NULL; 270 } 271 primary_bus = host->bus; 272 } 273 274 return primary_bus; 275 } 276 277 PCIBus *pci_device_root_bus(const PCIDevice *d) 278 { 279 PCIBus *bus = d->bus; 280 281 while ((d = bus->parent_dev) != NULL) { 282 bus = d->bus; 283 } 284 285 return bus; 286 } 287 288 const char *pci_root_bus_path(PCIDevice *dev) 289 { 290 PCIBus *rootbus = pci_device_root_bus(dev); 291 PCIHostState *host_bridge = PCI_HOST_BRIDGE(rootbus->qbus.parent); 292 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_GET_CLASS(host_bridge); 293 294 assert(!rootbus->parent_dev); 295 assert(host_bridge->bus == rootbus); 296 297 if (hc->root_bus_path) { 298 return (*hc->root_bus_path)(host_bridge, rootbus); 299 } 300 301 return rootbus->qbus.name; 302 } 303 304 static void pci_bus_init(PCIBus *bus, DeviceState *parent, 305 const char *name, 306 MemoryRegion *address_space_mem, 307 MemoryRegion *address_space_io, 308 uint8_t devfn_min) 309 { 310 assert(PCI_FUNC(devfn_min) == 0); 311 bus->devfn_min = devfn_min; 312 bus->address_space_mem = address_space_mem; 313 bus->address_space_io = address_space_io; 314 315 /* host bridge */ 316 QLIST_INIT(&bus->child); 317 318 pci_host_bus_register(bus, parent); 319 } 320 321 bool pci_bus_is_express(PCIBus *bus) 322 { 323 return object_dynamic_cast(OBJECT(bus), TYPE_PCIE_BUS); 324 } 325 326 bool pci_bus_is_root(PCIBus *bus) 327 { 328 return !bus->parent_dev; 329 } 330 331 void pci_bus_new_inplace(PCIBus *bus, size_t bus_size, DeviceState *parent, 332 const char *name, 333 MemoryRegion *address_space_mem, 334 MemoryRegion *address_space_io, 335 uint8_t devfn_min, const char *typename) 336 { 337 qbus_create_inplace(bus, bus_size, typename, parent, name); 338 pci_bus_init(bus, parent, name, address_space_mem, 339 address_space_io, devfn_min); 340 } 341 342 PCIBus *pci_bus_new(DeviceState *parent, const char *name, 343 MemoryRegion *address_space_mem, 344 MemoryRegion *address_space_io, 345 uint8_t devfn_min, const char *typename) 346 { 347 PCIBus *bus; 348 349 bus = PCI_BUS(qbus_create(typename, parent, name)); 350 pci_bus_init(bus, parent, name, address_space_mem, 351 address_space_io, devfn_min); 352 return bus; 353 } 354 355 void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq, 356 void *irq_opaque, int nirq) 357 { 358 bus->set_irq = set_irq; 359 bus->map_irq = map_irq; 360 bus->irq_opaque = irq_opaque; 361 bus->nirq = nirq; 362 bus->irq_count = g_malloc0(nirq * sizeof(bus->irq_count[0])); 363 } 364 365 PCIBus *pci_register_bus(DeviceState *parent, const char *name, 366 pci_set_irq_fn set_irq, pci_map_irq_fn map_irq, 367 void *irq_opaque, 368 MemoryRegion *address_space_mem, 369 MemoryRegion *address_space_io, 370 uint8_t devfn_min, int nirq, const char *typename) 371 { 372 PCIBus *bus; 373 374 bus = pci_bus_new(parent, name, address_space_mem, 375 address_space_io, devfn_min, typename); 376 pci_bus_irqs(bus, set_irq, map_irq, irq_opaque, nirq); 377 return bus; 378 } 379 380 int pci_bus_num(PCIBus *s) 381 { 382 if (pci_bus_is_root(s)) 383 return 0; /* pci host bridge */ 384 return s->parent_dev->config[PCI_SECONDARY_BUS]; 385 } 386 387 static int get_pci_config_device(QEMUFile *f, void *pv, size_t size) 388 { 389 PCIDevice *s = container_of(pv, PCIDevice, config); 390 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(s); 391 uint8_t *config; 392 int i; 393 394 assert(size == pci_config_size(s)); 395 config = g_malloc(size); 396 397 qemu_get_buffer(f, config, size); 398 for (i = 0; i < size; ++i) { 399 if ((config[i] ^ s->config[i]) & 400 s->cmask[i] & ~s->wmask[i] & ~s->w1cmask[i]) { 401 g_free(config); 402 return -EINVAL; 403 } 404 } 405 memcpy(s->config, config, size); 406 407 pci_update_mappings(s); 408 if (pc->is_bridge) { 409 PCIBridge *b = PCI_BRIDGE(s); 410 pci_bridge_update_mappings(b); 411 } 412 413 memory_region_set_enabled(&s->bus_master_enable_region, 414 pci_get_word(s->config + PCI_COMMAND) 415 & PCI_COMMAND_MASTER); 416 417 g_free(config); 418 return 0; 419 } 420 421 /* just put buffer */ 422 static void put_pci_config_device(QEMUFile *f, void *pv, size_t size) 423 { 424 const uint8_t **v = pv; 425 assert(size == pci_config_size(container_of(pv, PCIDevice, config))); 426 qemu_put_buffer(f, *v, size); 427 } 428 429 static VMStateInfo vmstate_info_pci_config = { 430 .name = "pci config", 431 .get = get_pci_config_device, 432 .put = put_pci_config_device, 433 }; 434 435 static int get_pci_irq_state(QEMUFile *f, void *pv, size_t size) 436 { 437 PCIDevice *s = container_of(pv, PCIDevice, irq_state); 438 uint32_t irq_state[PCI_NUM_PINS]; 439 int i; 440 for (i = 0; i < PCI_NUM_PINS; ++i) { 441 irq_state[i] = qemu_get_be32(f); 442 if (irq_state[i] != 0x1 && irq_state[i] != 0) { 443 fprintf(stderr, "irq state %d: must be 0 or 1.\n", 444 irq_state[i]); 445 return -EINVAL; 446 } 447 } 448 449 for (i = 0; i < PCI_NUM_PINS; ++i) { 450 pci_set_irq_state(s, i, irq_state[i]); 451 } 452 453 return 0; 454 } 455 456 static void put_pci_irq_state(QEMUFile *f, void *pv, size_t size) 457 { 458 int i; 459 PCIDevice *s = container_of(pv, PCIDevice, irq_state); 460 461 for (i = 0; i < PCI_NUM_PINS; ++i) { 462 qemu_put_be32(f, pci_irq_state(s, i)); 463 } 464 } 465 466 static VMStateInfo vmstate_info_pci_irq_state = { 467 .name = "pci irq state", 468 .get = get_pci_irq_state, 469 .put = put_pci_irq_state, 470 }; 471 472 const VMStateDescription vmstate_pci_device = { 473 .name = "PCIDevice", 474 .version_id = 2, 475 .minimum_version_id = 1, 476 .fields = (VMStateField[]) { 477 VMSTATE_INT32_POSITIVE_LE(version_id, PCIDevice), 478 VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0, 479 vmstate_info_pci_config, 480 PCI_CONFIG_SPACE_SIZE), 481 VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2, 482 vmstate_info_pci_irq_state, 483 PCI_NUM_PINS * sizeof(int32_t)), 484 VMSTATE_END_OF_LIST() 485 } 486 }; 487 488 const VMStateDescription vmstate_pcie_device = { 489 .name = "PCIEDevice", 490 .version_id = 2, 491 .minimum_version_id = 1, 492 .fields = (VMStateField[]) { 493 VMSTATE_INT32_POSITIVE_LE(version_id, PCIDevice), 494 VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0, 495 vmstate_info_pci_config, 496 PCIE_CONFIG_SPACE_SIZE), 497 VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2, 498 vmstate_info_pci_irq_state, 499 PCI_NUM_PINS * sizeof(int32_t)), 500 VMSTATE_END_OF_LIST() 501 } 502 }; 503 504 static inline const VMStateDescription *pci_get_vmstate(PCIDevice *s) 505 { 506 return pci_is_express(s) ? &vmstate_pcie_device : &vmstate_pci_device; 507 } 508 509 void pci_device_save(PCIDevice *s, QEMUFile *f) 510 { 511 /* Clear interrupt status bit: it is implicit 512 * in irq_state which we are saving. 513 * This makes us compatible with old devices 514 * which never set or clear this bit. */ 515 s->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT; 516 vmstate_save_state(f, pci_get_vmstate(s), s, NULL); 517 /* Restore the interrupt status bit. */ 518 pci_update_irq_status(s); 519 } 520 521 int pci_device_load(PCIDevice *s, QEMUFile *f) 522 { 523 int ret; 524 ret = vmstate_load_state(f, pci_get_vmstate(s), s, s->version_id); 525 /* Restore the interrupt status bit. */ 526 pci_update_irq_status(s); 527 return ret; 528 } 529 530 static void pci_set_default_subsystem_id(PCIDevice *pci_dev) 531 { 532 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID, 533 pci_default_sub_vendor_id); 534 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID, 535 pci_default_sub_device_id); 536 } 537 538 /* 539 * Parse [[<domain>:]<bus>:]<slot>, return -1 on error if funcp == NULL 540 * [[<domain>:]<bus>:]<slot>.<func>, return -1 on error 541 */ 542 static int pci_parse_devaddr(const char *addr, int *domp, int *busp, 543 unsigned int *slotp, unsigned int *funcp) 544 { 545 const char *p; 546 char *e; 547 unsigned long val; 548 unsigned long dom = 0, bus = 0; 549 unsigned int slot = 0; 550 unsigned int func = 0; 551 552 p = addr; 553 val = strtoul(p, &e, 16); 554 if (e == p) 555 return -1; 556 if (*e == ':') { 557 bus = val; 558 p = e + 1; 559 val = strtoul(p, &e, 16); 560 if (e == p) 561 return -1; 562 if (*e == ':') { 563 dom = bus; 564 bus = val; 565 p = e + 1; 566 val = strtoul(p, &e, 16); 567 if (e == p) 568 return -1; 569 } 570 } 571 572 slot = val; 573 574 if (funcp != NULL) { 575 if (*e != '.') 576 return -1; 577 578 p = e + 1; 579 val = strtoul(p, &e, 16); 580 if (e == p) 581 return -1; 582 583 func = val; 584 } 585 586 /* if funcp == NULL func is 0 */ 587 if (dom > 0xffff || bus > 0xff || slot > 0x1f || func > 7) 588 return -1; 589 590 if (*e) 591 return -1; 592 593 *domp = dom; 594 *busp = bus; 595 *slotp = slot; 596 if (funcp != NULL) 597 *funcp = func; 598 return 0; 599 } 600 601 static PCIBus *pci_get_bus_devfn(int *devfnp, PCIBus *root, 602 const char *devaddr) 603 { 604 int dom, bus; 605 unsigned slot; 606 607 if (!root) { 608 fprintf(stderr, "No primary PCI bus\n"); 609 return NULL; 610 } 611 612 assert(!root->parent_dev); 613 614 if (!devaddr) { 615 *devfnp = -1; 616 return pci_find_bus_nr(root, 0); 617 } 618 619 if (pci_parse_devaddr(devaddr, &dom, &bus, &slot, NULL) < 0) { 620 return NULL; 621 } 622 623 if (dom != 0) { 624 fprintf(stderr, "No support for non-zero PCI domains\n"); 625 return NULL; 626 } 627 628 *devfnp = PCI_DEVFN(slot, 0); 629 return pci_find_bus_nr(root, bus); 630 } 631 632 static void pci_init_cmask(PCIDevice *dev) 633 { 634 pci_set_word(dev->cmask + PCI_VENDOR_ID, 0xffff); 635 pci_set_word(dev->cmask + PCI_DEVICE_ID, 0xffff); 636 dev->cmask[PCI_STATUS] = PCI_STATUS_CAP_LIST; 637 dev->cmask[PCI_REVISION_ID] = 0xff; 638 dev->cmask[PCI_CLASS_PROG] = 0xff; 639 pci_set_word(dev->cmask + PCI_CLASS_DEVICE, 0xffff); 640 dev->cmask[PCI_HEADER_TYPE] = 0xff; 641 dev->cmask[PCI_CAPABILITY_LIST] = 0xff; 642 } 643 644 static void pci_init_wmask(PCIDevice *dev) 645 { 646 int config_size = pci_config_size(dev); 647 648 dev->wmask[PCI_CACHE_LINE_SIZE] = 0xff; 649 dev->wmask[PCI_INTERRUPT_LINE] = 0xff; 650 pci_set_word(dev->wmask + PCI_COMMAND, 651 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 652 PCI_COMMAND_INTX_DISABLE); 653 if (dev->cap_present & QEMU_PCI_CAP_SERR) { 654 pci_word_test_and_set_mask(dev->wmask + PCI_COMMAND, PCI_COMMAND_SERR); 655 } 656 657 memset(dev->wmask + PCI_CONFIG_HEADER_SIZE, 0xff, 658 config_size - PCI_CONFIG_HEADER_SIZE); 659 } 660 661 static void pci_init_w1cmask(PCIDevice *dev) 662 { 663 /* 664 * Note: It's okay to set w1cmask even for readonly bits as 665 * long as their value is hardwired to 0. 666 */ 667 pci_set_word(dev->w1cmask + PCI_STATUS, 668 PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT | 669 PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT | 670 PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY); 671 } 672 673 static void pci_init_mask_bridge(PCIDevice *d) 674 { 675 /* PCI_PRIMARY_BUS, PCI_SECONDARY_BUS, PCI_SUBORDINATE_BUS and 676 PCI_SEC_LETENCY_TIMER */ 677 memset(d->wmask + PCI_PRIMARY_BUS, 0xff, 4); 678 679 /* base and limit */ 680 d->wmask[PCI_IO_BASE] = PCI_IO_RANGE_MASK & 0xff; 681 d->wmask[PCI_IO_LIMIT] = PCI_IO_RANGE_MASK & 0xff; 682 pci_set_word(d->wmask + PCI_MEMORY_BASE, 683 PCI_MEMORY_RANGE_MASK & 0xffff); 684 pci_set_word(d->wmask + PCI_MEMORY_LIMIT, 685 PCI_MEMORY_RANGE_MASK & 0xffff); 686 pci_set_word(d->wmask + PCI_PREF_MEMORY_BASE, 687 PCI_PREF_RANGE_MASK & 0xffff); 688 pci_set_word(d->wmask + PCI_PREF_MEMORY_LIMIT, 689 PCI_PREF_RANGE_MASK & 0xffff); 690 691 /* PCI_PREF_BASE_UPPER32 and PCI_PREF_LIMIT_UPPER32 */ 692 memset(d->wmask + PCI_PREF_BASE_UPPER32, 0xff, 8); 693 694 /* Supported memory and i/o types */ 695 d->config[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_16; 696 d->config[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_16; 697 pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_BASE, 698 PCI_PREF_RANGE_TYPE_64); 699 pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_LIMIT, 700 PCI_PREF_RANGE_TYPE_64); 701 702 /* 703 * TODO: Bridges default to 10-bit VGA decoding but we currently only 704 * implement 16-bit decoding (no alias support). 705 */ 706 pci_set_word(d->wmask + PCI_BRIDGE_CONTROL, 707 PCI_BRIDGE_CTL_PARITY | 708 PCI_BRIDGE_CTL_SERR | 709 PCI_BRIDGE_CTL_ISA | 710 PCI_BRIDGE_CTL_VGA | 711 PCI_BRIDGE_CTL_VGA_16BIT | 712 PCI_BRIDGE_CTL_MASTER_ABORT | 713 PCI_BRIDGE_CTL_BUS_RESET | 714 PCI_BRIDGE_CTL_FAST_BACK | 715 PCI_BRIDGE_CTL_DISCARD | 716 PCI_BRIDGE_CTL_SEC_DISCARD | 717 PCI_BRIDGE_CTL_DISCARD_SERR); 718 /* Below does not do anything as we never set this bit, put here for 719 * completeness. */ 720 pci_set_word(d->w1cmask + PCI_BRIDGE_CONTROL, 721 PCI_BRIDGE_CTL_DISCARD_STATUS); 722 d->cmask[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_MASK; 723 d->cmask[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_MASK; 724 pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_BASE, 725 PCI_PREF_RANGE_TYPE_MASK); 726 pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_LIMIT, 727 PCI_PREF_RANGE_TYPE_MASK); 728 } 729 730 static void pci_init_multifunction(PCIBus *bus, PCIDevice *dev, Error **errp) 731 { 732 uint8_t slot = PCI_SLOT(dev->devfn); 733 uint8_t func; 734 735 if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { 736 dev->config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION; 737 } 738 739 /* 740 * multifunction bit is interpreted in two ways as follows. 741 * - all functions must set the bit to 1. 742 * Example: Intel X53 743 * - function 0 must set the bit, but the rest function (> 0) 744 * is allowed to leave the bit to 0. 745 * Example: PIIX3(also in qemu), PIIX4(also in qemu), ICH10, 746 * 747 * So OS (at least Linux) checks the bit of only function 0, 748 * and doesn't see the bit of function > 0. 749 * 750 * The below check allows both interpretation. 751 */ 752 if (PCI_FUNC(dev->devfn)) { 753 PCIDevice *f0 = bus->devices[PCI_DEVFN(slot, 0)]; 754 if (f0 && !(f0->cap_present & QEMU_PCI_CAP_MULTIFUNCTION)) { 755 /* function 0 should set multifunction bit */ 756 error_setg(errp, "PCI: single function device can't be populated " 757 "in function %x.%x", slot, PCI_FUNC(dev->devfn)); 758 return; 759 } 760 return; 761 } 762 763 if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { 764 return; 765 } 766 /* function 0 indicates single function, so function > 0 must be NULL */ 767 for (func = 1; func < PCI_FUNC_MAX; ++func) { 768 if (bus->devices[PCI_DEVFN(slot, func)]) { 769 error_setg(errp, "PCI: %x.0 indicates single function, " 770 "but %x.%x is already populated.", 771 slot, slot, func); 772 return; 773 } 774 } 775 } 776 777 static void pci_config_alloc(PCIDevice *pci_dev) 778 { 779 int config_size = pci_config_size(pci_dev); 780 781 pci_dev->config = g_malloc0(config_size); 782 pci_dev->cmask = g_malloc0(config_size); 783 pci_dev->wmask = g_malloc0(config_size); 784 pci_dev->w1cmask = g_malloc0(config_size); 785 pci_dev->used = g_malloc0(config_size); 786 } 787 788 static void pci_config_free(PCIDevice *pci_dev) 789 { 790 g_free(pci_dev->config); 791 g_free(pci_dev->cmask); 792 g_free(pci_dev->wmask); 793 g_free(pci_dev->w1cmask); 794 g_free(pci_dev->used); 795 } 796 797 static void do_pci_unregister_device(PCIDevice *pci_dev) 798 { 799 pci_dev->bus->devices[pci_dev->devfn] = NULL; 800 pci_config_free(pci_dev); 801 802 address_space_destroy(&pci_dev->bus_master_as); 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 Error **errp) 809 { 810 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev); 811 PCIConfigReadFunc *config_read = pc->config_read; 812 PCIConfigWriteFunc *config_write = pc->config_write; 813 Error *local_err = NULL; 814 AddressSpace *dma_as; 815 816 if (devfn < 0) { 817 for(devfn = bus->devfn_min ; devfn < ARRAY_SIZE(bus->devices); 818 devfn += PCI_FUNC_MAX) { 819 if (!bus->devices[devfn]) 820 goto found; 821 } 822 error_setg(errp, "PCI: no slot/function available for %s, all in use", 823 name); 824 return NULL; 825 found: ; 826 } else if (bus->devices[devfn]) { 827 error_setg(errp, "PCI: slot %d function %d not available for %s," 828 " in use by %s", 829 PCI_SLOT(devfn), PCI_FUNC(devfn), name, 830 bus->devices[devfn]->name); 831 return NULL; 832 } 833 834 pci_dev->bus = bus; 835 pci_dev->devfn = devfn; 836 dma_as = pci_device_iommu_address_space(pci_dev); 837 838 memory_region_init_alias(&pci_dev->bus_master_enable_region, 839 OBJECT(pci_dev), "bus master", 840 dma_as->root, 0, memory_region_size(dma_as->root)); 841 memory_region_set_enabled(&pci_dev->bus_master_enable_region, false); 842 address_space_init(&pci_dev->bus_master_as, &pci_dev->bus_master_enable_region, 843 name); 844 845 pstrcpy(pci_dev->name, sizeof(pci_dev->name), name); 846 pci_dev->irq_state = 0; 847 pci_config_alloc(pci_dev); 848 849 pci_config_set_vendor_id(pci_dev->config, pc->vendor_id); 850 pci_config_set_device_id(pci_dev->config, pc->device_id); 851 pci_config_set_revision(pci_dev->config, pc->revision); 852 pci_config_set_class(pci_dev->config, pc->class_id); 853 854 if (!pc->is_bridge) { 855 if (pc->subsystem_vendor_id || pc->subsystem_id) { 856 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID, 857 pc->subsystem_vendor_id); 858 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID, 859 pc->subsystem_id); 860 } else { 861 pci_set_default_subsystem_id(pci_dev); 862 } 863 } else { 864 /* subsystem_vendor_id/subsystem_id are only for header type 0 */ 865 assert(!pc->subsystem_vendor_id); 866 assert(!pc->subsystem_id); 867 } 868 pci_init_cmask(pci_dev); 869 pci_init_wmask(pci_dev); 870 pci_init_w1cmask(pci_dev); 871 if (pc->is_bridge) { 872 pci_init_mask_bridge(pci_dev); 873 } 874 pci_init_multifunction(bus, pci_dev, &local_err); 875 if (local_err) { 876 error_propagate(errp, local_err); 877 do_pci_unregister_device(pci_dev); 878 return NULL; 879 } 880 881 if (!config_read) 882 config_read = pci_default_read_config; 883 if (!config_write) 884 config_write = pci_default_write_config; 885 pci_dev->config_read = config_read; 886 pci_dev->config_write = config_write; 887 bus->devices[devfn] = pci_dev; 888 pci_dev->version_id = 2; /* Current pci device vmstate version */ 889 return pci_dev; 890 } 891 892 static void pci_unregister_io_regions(PCIDevice *pci_dev) 893 { 894 PCIIORegion *r; 895 int i; 896 897 for(i = 0; i < PCI_NUM_REGIONS; i++) { 898 r = &pci_dev->io_regions[i]; 899 if (!r->size || r->addr == PCI_BAR_UNMAPPED) 900 continue; 901 memory_region_del_subregion(r->address_space, r->memory); 902 } 903 904 pci_unregister_vga(pci_dev); 905 } 906 907 static void pci_qdev_unrealize(DeviceState *dev, Error **errp) 908 { 909 PCIDevice *pci_dev = PCI_DEVICE(dev); 910 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev); 911 912 pci_unregister_io_regions(pci_dev); 913 pci_del_option_rom(pci_dev); 914 915 if (pc->exit) { 916 pc->exit(pci_dev); 917 } 918 919 do_pci_unregister_device(pci_dev); 920 } 921 922 void pci_register_bar(PCIDevice *pci_dev, int region_num, 923 uint8_t type, MemoryRegion *memory) 924 { 925 PCIIORegion *r; 926 uint32_t addr; 927 uint64_t wmask; 928 pcibus_t size = memory_region_size(memory); 929 930 assert(region_num >= 0); 931 assert(region_num < PCI_NUM_REGIONS); 932 if (size & (size-1)) { 933 fprintf(stderr, "ERROR: PCI region size must be pow2 " 934 "type=0x%x, size=0x%"FMT_PCIBUS"\n", type, size); 935 exit(1); 936 } 937 938 r = &pci_dev->io_regions[region_num]; 939 r->addr = PCI_BAR_UNMAPPED; 940 r->size = size; 941 r->type = type; 942 r->memory = NULL; 943 944 wmask = ~(size - 1); 945 addr = pci_bar(pci_dev, region_num); 946 if (region_num == PCI_ROM_SLOT) { 947 /* ROM enable bit is writable */ 948 wmask |= PCI_ROM_ADDRESS_ENABLE; 949 } 950 pci_set_long(pci_dev->config + addr, type); 951 if (!(r->type & PCI_BASE_ADDRESS_SPACE_IO) && 952 r->type & PCI_BASE_ADDRESS_MEM_TYPE_64) { 953 pci_set_quad(pci_dev->wmask + addr, wmask); 954 pci_set_quad(pci_dev->cmask + addr, ~0ULL); 955 } else { 956 pci_set_long(pci_dev->wmask + addr, wmask & 0xffffffff); 957 pci_set_long(pci_dev->cmask + addr, 0xffffffff); 958 } 959 pci_dev->io_regions[region_num].memory = memory; 960 pci_dev->io_regions[region_num].address_space 961 = type & PCI_BASE_ADDRESS_SPACE_IO 962 ? pci_dev->bus->address_space_io 963 : pci_dev->bus->address_space_mem; 964 } 965 966 static void pci_update_vga(PCIDevice *pci_dev) 967 { 968 uint16_t cmd; 969 970 if (!pci_dev->has_vga) { 971 return; 972 } 973 974 cmd = pci_get_word(pci_dev->config + PCI_COMMAND); 975 976 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_MEM], 977 cmd & PCI_COMMAND_MEMORY); 978 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO], 979 cmd & PCI_COMMAND_IO); 980 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI], 981 cmd & PCI_COMMAND_IO); 982 } 983 984 void pci_register_vga(PCIDevice *pci_dev, MemoryRegion *mem, 985 MemoryRegion *io_lo, MemoryRegion *io_hi) 986 { 987 assert(!pci_dev->has_vga); 988 989 assert(memory_region_size(mem) == QEMU_PCI_VGA_MEM_SIZE); 990 pci_dev->vga_regions[QEMU_PCI_VGA_MEM] = mem; 991 memory_region_add_subregion_overlap(pci_dev->bus->address_space_mem, 992 QEMU_PCI_VGA_MEM_BASE, mem, 1); 993 994 assert(memory_region_size(io_lo) == QEMU_PCI_VGA_IO_LO_SIZE); 995 pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO] = io_lo; 996 memory_region_add_subregion_overlap(pci_dev->bus->address_space_io, 997 QEMU_PCI_VGA_IO_LO_BASE, io_lo, 1); 998 999 assert(memory_region_size(io_hi) == QEMU_PCI_VGA_IO_HI_SIZE); 1000 pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI] = io_hi; 1001 memory_region_add_subregion_overlap(pci_dev->bus->address_space_io, 1002 QEMU_PCI_VGA_IO_HI_BASE, io_hi, 1); 1003 pci_dev->has_vga = true; 1004 1005 pci_update_vga(pci_dev); 1006 } 1007 1008 void pci_unregister_vga(PCIDevice *pci_dev) 1009 { 1010 if (!pci_dev->has_vga) { 1011 return; 1012 } 1013 1014 memory_region_del_subregion(pci_dev->bus->address_space_mem, 1015 pci_dev->vga_regions[QEMU_PCI_VGA_MEM]); 1016 memory_region_del_subregion(pci_dev->bus->address_space_io, 1017 pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO]); 1018 memory_region_del_subregion(pci_dev->bus->address_space_io, 1019 pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI]); 1020 pci_dev->has_vga = false; 1021 } 1022 1023 pcibus_t pci_get_bar_addr(PCIDevice *pci_dev, int region_num) 1024 { 1025 return pci_dev->io_regions[region_num].addr; 1026 } 1027 1028 static pcibus_t pci_bar_address(PCIDevice *d, 1029 int reg, uint8_t type, pcibus_t size) 1030 { 1031 pcibus_t new_addr, last_addr; 1032 int bar = pci_bar(d, reg); 1033 uint16_t cmd = pci_get_word(d->config + PCI_COMMAND); 1034 1035 if (type & PCI_BASE_ADDRESS_SPACE_IO) { 1036 if (!(cmd & PCI_COMMAND_IO)) { 1037 return PCI_BAR_UNMAPPED; 1038 } 1039 new_addr = pci_get_long(d->config + bar) & ~(size - 1); 1040 last_addr = new_addr + size - 1; 1041 /* Check if 32 bit BAR wraps around explicitly. 1042 * TODO: make priorities correct and remove this work around. 1043 */ 1044 if (last_addr <= new_addr || new_addr == 0 || last_addr >= UINT32_MAX) { 1045 return PCI_BAR_UNMAPPED; 1046 } 1047 return new_addr; 1048 } 1049 1050 if (!(cmd & PCI_COMMAND_MEMORY)) { 1051 return PCI_BAR_UNMAPPED; 1052 } 1053 if (type & PCI_BASE_ADDRESS_MEM_TYPE_64) { 1054 new_addr = pci_get_quad(d->config + bar); 1055 } else { 1056 new_addr = pci_get_long(d->config + bar); 1057 } 1058 /* the ROM slot has a specific enable bit */ 1059 if (reg == PCI_ROM_SLOT && !(new_addr & PCI_ROM_ADDRESS_ENABLE)) { 1060 return PCI_BAR_UNMAPPED; 1061 } 1062 new_addr &= ~(size - 1); 1063 last_addr = new_addr + size - 1; 1064 /* NOTE: we do not support wrapping */ 1065 /* XXX: as we cannot support really dynamic 1066 mappings, we handle specific values as invalid 1067 mappings. */ 1068 if (last_addr <= new_addr || new_addr == 0 || 1069 last_addr == PCI_BAR_UNMAPPED) { 1070 return PCI_BAR_UNMAPPED; 1071 } 1072 1073 /* Now pcibus_t is 64bit. 1074 * Check if 32 bit BAR wraps around explicitly. 1075 * Without this, PC ide doesn't work well. 1076 * TODO: remove this work around. 1077 */ 1078 if (!(type & PCI_BASE_ADDRESS_MEM_TYPE_64) && last_addr >= UINT32_MAX) { 1079 return PCI_BAR_UNMAPPED; 1080 } 1081 1082 /* 1083 * OS is allowed to set BAR beyond its addressable 1084 * bits. For example, 32 bit OS can set 64bit bar 1085 * to >4G. Check it. TODO: we might need to support 1086 * it in the future for e.g. PAE. 1087 */ 1088 if (last_addr >= HWADDR_MAX) { 1089 return PCI_BAR_UNMAPPED; 1090 } 1091 1092 return new_addr; 1093 } 1094 1095 static void pci_update_mappings(PCIDevice *d) 1096 { 1097 PCIIORegion *r; 1098 int i; 1099 pcibus_t new_addr; 1100 1101 for(i = 0; i < PCI_NUM_REGIONS; i++) { 1102 r = &d->io_regions[i]; 1103 1104 /* this region isn't registered */ 1105 if (!r->size) 1106 continue; 1107 1108 new_addr = pci_bar_address(d, i, r->type, r->size); 1109 1110 /* This bar isn't changed */ 1111 if (new_addr == r->addr) 1112 continue; 1113 1114 /* now do the real mapping */ 1115 if (r->addr != PCI_BAR_UNMAPPED) { 1116 trace_pci_update_mappings_del(d, pci_bus_num(d->bus), 1117 PCI_FUNC(d->devfn), 1118 PCI_SLOT(d->devfn), 1119 i, r->addr, r->size); 1120 memory_region_del_subregion(r->address_space, r->memory); 1121 } 1122 r->addr = new_addr; 1123 if (r->addr != PCI_BAR_UNMAPPED) { 1124 trace_pci_update_mappings_add(d, pci_bus_num(d->bus), 1125 PCI_FUNC(d->devfn), 1126 PCI_SLOT(d->devfn), 1127 i, r->addr, r->size); 1128 memory_region_add_subregion_overlap(r->address_space, 1129 r->addr, r->memory, 1); 1130 } 1131 } 1132 1133 pci_update_vga(d); 1134 } 1135 1136 static inline int pci_irq_disabled(PCIDevice *d) 1137 { 1138 return pci_get_word(d->config + PCI_COMMAND) & PCI_COMMAND_INTX_DISABLE; 1139 } 1140 1141 /* Called after interrupt disabled field update in config space, 1142 * assert/deassert interrupts if necessary. 1143 * Gets original interrupt disable bit value (before update). */ 1144 static void pci_update_irq_disabled(PCIDevice *d, int was_irq_disabled) 1145 { 1146 int i, disabled = pci_irq_disabled(d); 1147 if (disabled == was_irq_disabled) 1148 return; 1149 for (i = 0; i < PCI_NUM_PINS; ++i) { 1150 int state = pci_irq_state(d, i); 1151 pci_change_irq_level(d, i, disabled ? -state : state); 1152 } 1153 } 1154 1155 uint32_t pci_default_read_config(PCIDevice *d, 1156 uint32_t address, int len) 1157 { 1158 uint32_t val = 0; 1159 1160 memcpy(&val, d->config + address, len); 1161 return le32_to_cpu(val); 1162 } 1163 1164 void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val_in, int l) 1165 { 1166 int i, was_irq_disabled = pci_irq_disabled(d); 1167 uint32_t val = val_in; 1168 1169 for (i = 0; i < l; val >>= 8, ++i) { 1170 uint8_t wmask = d->wmask[addr + i]; 1171 uint8_t w1cmask = d->w1cmask[addr + i]; 1172 assert(!(wmask & w1cmask)); 1173 d->config[addr + i] = (d->config[addr + i] & ~wmask) | (val & wmask); 1174 d->config[addr + i] &= ~(val & w1cmask); /* W1C: Write 1 to Clear */ 1175 } 1176 if (ranges_overlap(addr, l, PCI_BASE_ADDRESS_0, 24) || 1177 ranges_overlap(addr, l, PCI_ROM_ADDRESS, 4) || 1178 ranges_overlap(addr, l, PCI_ROM_ADDRESS1, 4) || 1179 range_covers_byte(addr, l, PCI_COMMAND)) 1180 pci_update_mappings(d); 1181 1182 if (range_covers_byte(addr, l, PCI_COMMAND)) { 1183 pci_update_irq_disabled(d, was_irq_disabled); 1184 memory_region_set_enabled(&d->bus_master_enable_region, 1185 pci_get_word(d->config + PCI_COMMAND) 1186 & PCI_COMMAND_MASTER); 1187 } 1188 1189 msi_write_config(d, addr, val_in, l); 1190 msix_write_config(d, addr, val_in, l); 1191 } 1192 1193 /***********************************************************/ 1194 /* generic PCI irq support */ 1195 1196 /* 0 <= irq_num <= 3. level must be 0 or 1 */ 1197 static void pci_irq_handler(void *opaque, int irq_num, int level) 1198 { 1199 PCIDevice *pci_dev = opaque; 1200 int change; 1201 1202 change = level - pci_irq_state(pci_dev, irq_num); 1203 if (!change) 1204 return; 1205 1206 pci_set_irq_state(pci_dev, irq_num, level); 1207 pci_update_irq_status(pci_dev); 1208 if (pci_irq_disabled(pci_dev)) 1209 return; 1210 pci_change_irq_level(pci_dev, irq_num, change); 1211 } 1212 1213 static inline int pci_intx(PCIDevice *pci_dev) 1214 { 1215 return pci_get_byte(pci_dev->config + PCI_INTERRUPT_PIN) - 1; 1216 } 1217 1218 qemu_irq pci_allocate_irq(PCIDevice *pci_dev) 1219 { 1220 int intx = pci_intx(pci_dev); 1221 1222 return qemu_allocate_irq(pci_irq_handler, pci_dev, intx); 1223 } 1224 1225 void pci_set_irq(PCIDevice *pci_dev, int level) 1226 { 1227 int intx = pci_intx(pci_dev); 1228 pci_irq_handler(pci_dev, intx, level); 1229 } 1230 1231 /* Special hooks used by device assignment */ 1232 void pci_bus_set_route_irq_fn(PCIBus *bus, pci_route_irq_fn route_intx_to_irq) 1233 { 1234 assert(pci_bus_is_root(bus)); 1235 bus->route_intx_to_irq = route_intx_to_irq; 1236 } 1237 1238 PCIINTxRoute pci_device_route_intx_to_irq(PCIDevice *dev, int pin) 1239 { 1240 PCIBus *bus; 1241 1242 do { 1243 bus = dev->bus; 1244 pin = bus->map_irq(dev, pin); 1245 dev = bus->parent_dev; 1246 } while (dev); 1247 1248 if (!bus->route_intx_to_irq) { 1249 error_report("PCI: Bug - unimplemented PCI INTx routing (%s)", 1250 object_get_typename(OBJECT(bus->qbus.parent))); 1251 return (PCIINTxRoute) { PCI_INTX_DISABLED, -1 }; 1252 } 1253 1254 return bus->route_intx_to_irq(bus->irq_opaque, pin); 1255 } 1256 1257 bool pci_intx_route_changed(PCIINTxRoute *old, PCIINTxRoute *new) 1258 { 1259 return old->mode != new->mode || old->irq != new->irq; 1260 } 1261 1262 void pci_bus_fire_intx_routing_notifier(PCIBus *bus) 1263 { 1264 PCIDevice *dev; 1265 PCIBus *sec; 1266 int i; 1267 1268 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { 1269 dev = bus->devices[i]; 1270 if (dev && dev->intx_routing_notifier) { 1271 dev->intx_routing_notifier(dev); 1272 } 1273 } 1274 1275 QLIST_FOREACH(sec, &bus->child, sibling) { 1276 pci_bus_fire_intx_routing_notifier(sec); 1277 } 1278 } 1279 1280 void pci_device_set_intx_routing_notifier(PCIDevice *dev, 1281 PCIINTxRoutingNotifier notifier) 1282 { 1283 dev->intx_routing_notifier = notifier; 1284 } 1285 1286 /* 1287 * PCI-to-PCI bridge specification 1288 * 9.1: Interrupt routing. Table 9-1 1289 * 1290 * the PCI Express Base Specification, Revision 2.1 1291 * 2.2.8.1: INTx interrutp signaling - Rules 1292 * the Implementation Note 1293 * Table 2-20 1294 */ 1295 /* 1296 * 0 <= pin <= 3 0 = INTA, 1 = INTB, 2 = INTC, 3 = INTD 1297 * 0-origin unlike PCI interrupt pin register. 1298 */ 1299 int pci_swizzle_map_irq_fn(PCIDevice *pci_dev, int pin) 1300 { 1301 return (pin + PCI_SLOT(pci_dev->devfn)) % PCI_NUM_PINS; 1302 } 1303 1304 /***********************************************************/ 1305 /* monitor info on PCI */ 1306 1307 typedef struct { 1308 uint16_t class; 1309 const char *desc; 1310 const char *fw_name; 1311 uint16_t fw_ign_bits; 1312 } pci_class_desc; 1313 1314 static const pci_class_desc pci_class_descriptions[] = 1315 { 1316 { 0x0001, "VGA controller", "display"}, 1317 { 0x0100, "SCSI controller", "scsi"}, 1318 { 0x0101, "IDE controller", "ide"}, 1319 { 0x0102, "Floppy controller", "fdc"}, 1320 { 0x0103, "IPI controller", "ipi"}, 1321 { 0x0104, "RAID controller", "raid"}, 1322 { 0x0106, "SATA controller"}, 1323 { 0x0107, "SAS controller"}, 1324 { 0x0180, "Storage controller"}, 1325 { 0x0200, "Ethernet controller", "ethernet"}, 1326 { 0x0201, "Token Ring controller", "token-ring"}, 1327 { 0x0202, "FDDI controller", "fddi"}, 1328 { 0x0203, "ATM controller", "atm"}, 1329 { 0x0280, "Network controller"}, 1330 { 0x0300, "VGA controller", "display", 0x00ff}, 1331 { 0x0301, "XGA controller"}, 1332 { 0x0302, "3D controller"}, 1333 { 0x0380, "Display controller"}, 1334 { 0x0400, "Video controller", "video"}, 1335 { 0x0401, "Audio controller", "sound"}, 1336 { 0x0402, "Phone"}, 1337 { 0x0403, "Audio controller", "sound"}, 1338 { 0x0480, "Multimedia controller"}, 1339 { 0x0500, "RAM controller", "memory"}, 1340 { 0x0501, "Flash controller", "flash"}, 1341 { 0x0580, "Memory controller"}, 1342 { 0x0600, "Host bridge", "host"}, 1343 { 0x0601, "ISA bridge", "isa"}, 1344 { 0x0602, "EISA bridge", "eisa"}, 1345 { 0x0603, "MC bridge", "mca"}, 1346 { 0x0604, "PCI bridge", "pci-bridge"}, 1347 { 0x0605, "PCMCIA bridge", "pcmcia"}, 1348 { 0x0606, "NUBUS bridge", "nubus"}, 1349 { 0x0607, "CARDBUS bridge", "cardbus"}, 1350 { 0x0608, "RACEWAY bridge"}, 1351 { 0x0680, "Bridge"}, 1352 { 0x0700, "Serial port", "serial"}, 1353 { 0x0701, "Parallel port", "parallel"}, 1354 { 0x0800, "Interrupt controller", "interrupt-controller"}, 1355 { 0x0801, "DMA controller", "dma-controller"}, 1356 { 0x0802, "Timer", "timer"}, 1357 { 0x0803, "RTC", "rtc"}, 1358 { 0x0900, "Keyboard", "keyboard"}, 1359 { 0x0901, "Pen", "pen"}, 1360 { 0x0902, "Mouse", "mouse"}, 1361 { 0x0A00, "Dock station", "dock", 0x00ff}, 1362 { 0x0B00, "i386 cpu", "cpu", 0x00ff}, 1363 { 0x0c00, "Fireware contorller", "fireware"}, 1364 { 0x0c01, "Access bus controller", "access-bus"}, 1365 { 0x0c02, "SSA controller", "ssa"}, 1366 { 0x0c03, "USB controller", "usb"}, 1367 { 0x0c04, "Fibre channel controller", "fibre-channel"}, 1368 { 0x0c05, "SMBus"}, 1369 { 0, NULL} 1370 }; 1371 1372 static void pci_for_each_device_under_bus(PCIBus *bus, 1373 void (*fn)(PCIBus *b, PCIDevice *d, 1374 void *opaque), 1375 void *opaque) 1376 { 1377 PCIDevice *d; 1378 int devfn; 1379 1380 for(devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { 1381 d = bus->devices[devfn]; 1382 if (d) { 1383 fn(bus, d, opaque); 1384 } 1385 } 1386 } 1387 1388 void pci_for_each_device(PCIBus *bus, int bus_num, 1389 void (*fn)(PCIBus *b, PCIDevice *d, void *opaque), 1390 void *opaque) 1391 { 1392 bus = pci_find_bus_nr(bus, bus_num); 1393 1394 if (bus) { 1395 pci_for_each_device_under_bus(bus, fn, opaque); 1396 } 1397 } 1398 1399 static const pci_class_desc *get_class_desc(int class) 1400 { 1401 const pci_class_desc *desc; 1402 1403 desc = pci_class_descriptions; 1404 while (desc->desc && class != desc->class) { 1405 desc++; 1406 } 1407 1408 return desc; 1409 } 1410 1411 static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num); 1412 1413 static PciMemoryRegionList *qmp_query_pci_regions(const PCIDevice *dev) 1414 { 1415 PciMemoryRegionList *head = NULL, *cur_item = NULL; 1416 int i; 1417 1418 for (i = 0; i < PCI_NUM_REGIONS; i++) { 1419 const PCIIORegion *r = &dev->io_regions[i]; 1420 PciMemoryRegionList *region; 1421 1422 if (!r->size) { 1423 continue; 1424 } 1425 1426 region = g_malloc0(sizeof(*region)); 1427 region->value = g_malloc0(sizeof(*region->value)); 1428 1429 if (r->type & PCI_BASE_ADDRESS_SPACE_IO) { 1430 region->value->type = g_strdup("io"); 1431 } else { 1432 region->value->type = g_strdup("memory"); 1433 region->value->has_prefetch = true; 1434 region->value->prefetch = !!(r->type & PCI_BASE_ADDRESS_MEM_PREFETCH); 1435 region->value->has_mem_type_64 = true; 1436 region->value->mem_type_64 = !!(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64); 1437 } 1438 1439 region->value->bar = i; 1440 region->value->address = r->addr; 1441 region->value->size = r->size; 1442 1443 /* XXX: waiting for the qapi to support GSList */ 1444 if (!cur_item) { 1445 head = cur_item = region; 1446 } else { 1447 cur_item->next = region; 1448 cur_item = region; 1449 } 1450 } 1451 1452 return head; 1453 } 1454 1455 static PciBridgeInfo *qmp_query_pci_bridge(PCIDevice *dev, PCIBus *bus, 1456 int bus_num) 1457 { 1458 PciBridgeInfo *info; 1459 1460 info = g_malloc0(sizeof(*info)); 1461 1462 info->bus.number = dev->config[PCI_PRIMARY_BUS]; 1463 info->bus.secondary = dev->config[PCI_SECONDARY_BUS]; 1464 info->bus.subordinate = dev->config[PCI_SUBORDINATE_BUS]; 1465 1466 info->bus.io_range = g_malloc0(sizeof(*info->bus.io_range)); 1467 info->bus.io_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_IO); 1468 info->bus.io_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_IO); 1469 1470 info->bus.memory_range = g_malloc0(sizeof(*info->bus.memory_range)); 1471 info->bus.memory_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_MEMORY); 1472 info->bus.memory_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_MEMORY); 1473 1474 info->bus.prefetchable_range = g_malloc0(sizeof(*info->bus.prefetchable_range)); 1475 info->bus.prefetchable_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH); 1476 info->bus.prefetchable_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH); 1477 1478 if (dev->config[PCI_SECONDARY_BUS] != 0) { 1479 PCIBus *child_bus = pci_find_bus_nr(bus, dev->config[PCI_SECONDARY_BUS]); 1480 if (child_bus) { 1481 info->has_devices = true; 1482 info->devices = qmp_query_pci_devices(child_bus, dev->config[PCI_SECONDARY_BUS]); 1483 } 1484 } 1485 1486 return info; 1487 } 1488 1489 static PciDeviceInfo *qmp_query_pci_device(PCIDevice *dev, PCIBus *bus, 1490 int bus_num) 1491 { 1492 const pci_class_desc *desc; 1493 PciDeviceInfo *info; 1494 uint8_t type; 1495 int class; 1496 1497 info = g_malloc0(sizeof(*info)); 1498 info->bus = bus_num; 1499 info->slot = PCI_SLOT(dev->devfn); 1500 info->function = PCI_FUNC(dev->devfn); 1501 1502 class = pci_get_word(dev->config + PCI_CLASS_DEVICE); 1503 info->class_info.q_class = class; 1504 desc = get_class_desc(class); 1505 if (desc->desc) { 1506 info->class_info.has_desc = true; 1507 info->class_info.desc = g_strdup(desc->desc); 1508 } 1509 1510 info->id.vendor = pci_get_word(dev->config + PCI_VENDOR_ID); 1511 info->id.device = pci_get_word(dev->config + PCI_DEVICE_ID); 1512 info->regions = qmp_query_pci_regions(dev); 1513 info->qdev_id = g_strdup(dev->qdev.id ? dev->qdev.id : ""); 1514 1515 if (dev->config[PCI_INTERRUPT_PIN] != 0) { 1516 info->has_irq = true; 1517 info->irq = dev->config[PCI_INTERRUPT_LINE]; 1518 } 1519 1520 type = dev->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION; 1521 if (type == PCI_HEADER_TYPE_BRIDGE) { 1522 info->has_pci_bridge = true; 1523 info->pci_bridge = qmp_query_pci_bridge(dev, bus, bus_num); 1524 } 1525 1526 return info; 1527 } 1528 1529 static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num) 1530 { 1531 PciDeviceInfoList *info, *head = NULL, *cur_item = NULL; 1532 PCIDevice *dev; 1533 int devfn; 1534 1535 for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { 1536 dev = bus->devices[devfn]; 1537 if (dev) { 1538 info = g_malloc0(sizeof(*info)); 1539 info->value = qmp_query_pci_device(dev, bus, bus_num); 1540 1541 /* XXX: waiting for the qapi to support GSList */ 1542 if (!cur_item) { 1543 head = cur_item = info; 1544 } else { 1545 cur_item->next = info; 1546 cur_item = info; 1547 } 1548 } 1549 } 1550 1551 return head; 1552 } 1553 1554 static PciInfo *qmp_query_pci_bus(PCIBus *bus, int bus_num) 1555 { 1556 PciInfo *info = NULL; 1557 1558 bus = pci_find_bus_nr(bus, bus_num); 1559 if (bus) { 1560 info = g_malloc0(sizeof(*info)); 1561 info->bus = bus_num; 1562 info->devices = qmp_query_pci_devices(bus, bus_num); 1563 } 1564 1565 return info; 1566 } 1567 1568 PciInfoList *qmp_query_pci(Error **errp) 1569 { 1570 PciInfoList *info, *head = NULL, *cur_item = NULL; 1571 PCIHostState *host_bridge; 1572 1573 QLIST_FOREACH(host_bridge, &pci_host_bridges, next) { 1574 info = g_malloc0(sizeof(*info)); 1575 info->value = qmp_query_pci_bus(host_bridge->bus, 0); 1576 1577 /* XXX: waiting for the qapi to support GSList */ 1578 if (!cur_item) { 1579 head = cur_item = info; 1580 } else { 1581 cur_item->next = info; 1582 cur_item = info; 1583 } 1584 } 1585 1586 return head; 1587 } 1588 1589 static const char * const pci_nic_models[] = { 1590 "ne2k_pci", 1591 "i82551", 1592 "i82557b", 1593 "i82559er", 1594 "rtl8139", 1595 "e1000", 1596 "pcnet", 1597 "virtio", 1598 NULL 1599 }; 1600 1601 static const char * const pci_nic_names[] = { 1602 "ne2k_pci", 1603 "i82551", 1604 "i82557b", 1605 "i82559er", 1606 "rtl8139", 1607 "e1000", 1608 "pcnet", 1609 "virtio-net-pci", 1610 NULL 1611 }; 1612 1613 /* Initialize a PCI NIC. */ 1614 static PCIDevice *pci_nic_init(NICInfo *nd, PCIBus *rootbus, 1615 const char *default_model, 1616 const char *default_devaddr) 1617 { 1618 const char *devaddr = nd->devaddr ? nd->devaddr : default_devaddr; 1619 PCIBus *bus; 1620 int devfn; 1621 PCIDevice *pci_dev; 1622 DeviceState *dev; 1623 int i; 1624 1625 i = qemu_find_nic_model(nd, pci_nic_models, default_model); 1626 if (i < 0) 1627 return NULL; 1628 1629 bus = pci_get_bus_devfn(&devfn, rootbus, devaddr); 1630 if (!bus) { 1631 error_report("Invalid PCI device address %s for device %s", 1632 devaddr, pci_nic_names[i]); 1633 return NULL; 1634 } 1635 1636 pci_dev = pci_create(bus, devfn, pci_nic_names[i]); 1637 dev = &pci_dev->qdev; 1638 qdev_set_nic_properties(dev, nd); 1639 if (qdev_init(dev) < 0) 1640 return NULL; 1641 return pci_dev; 1642 } 1643 1644 PCIDevice *pci_nic_init_nofail(NICInfo *nd, PCIBus *rootbus, 1645 const char *default_model, 1646 const char *default_devaddr) 1647 { 1648 PCIDevice *res; 1649 1650 if (qemu_show_nic_models(nd->model, pci_nic_models)) 1651 exit(0); 1652 1653 res = pci_nic_init(nd, rootbus, default_model, default_devaddr); 1654 if (!res) 1655 exit(1); 1656 return res; 1657 } 1658 1659 PCIDevice *pci_vga_init(PCIBus *bus) 1660 { 1661 switch (vga_interface_type) { 1662 case VGA_CIRRUS: 1663 return pci_create_simple(bus, -1, "cirrus-vga"); 1664 case VGA_QXL: 1665 return pci_create_simple(bus, -1, "qxl-vga"); 1666 case VGA_STD: 1667 return pci_create_simple(bus, -1, "VGA"); 1668 case VGA_VMWARE: 1669 return pci_create_simple(bus, -1, "vmware-svga"); 1670 case VGA_NONE: 1671 default: /* Other non-PCI types. Checking for unsupported types is already 1672 done in vl.c. */ 1673 return NULL; 1674 } 1675 } 1676 1677 /* Whether a given bus number is in range of the secondary 1678 * bus of the given bridge device. */ 1679 static bool pci_secondary_bus_in_range(PCIDevice *dev, int bus_num) 1680 { 1681 return !(pci_get_word(dev->config + PCI_BRIDGE_CONTROL) & 1682 PCI_BRIDGE_CTL_BUS_RESET) /* Don't walk the bus if it's reset. */ && 1683 dev->config[PCI_SECONDARY_BUS] < bus_num && 1684 bus_num <= dev->config[PCI_SUBORDINATE_BUS]; 1685 } 1686 1687 static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num) 1688 { 1689 PCIBus *sec; 1690 1691 if (!bus) { 1692 return NULL; 1693 } 1694 1695 if (pci_bus_num(bus) == bus_num) { 1696 return bus; 1697 } 1698 1699 /* Consider all bus numbers in range for the host pci bridge. */ 1700 if (!pci_bus_is_root(bus) && 1701 !pci_secondary_bus_in_range(bus->parent_dev, bus_num)) { 1702 return NULL; 1703 } 1704 1705 /* try child bus */ 1706 for (; bus; bus = sec) { 1707 QLIST_FOREACH(sec, &bus->child, sibling) { 1708 assert(!pci_bus_is_root(sec)); 1709 if (sec->parent_dev->config[PCI_SECONDARY_BUS] == bus_num) { 1710 return sec; 1711 } 1712 if (pci_secondary_bus_in_range(sec->parent_dev, bus_num)) { 1713 break; 1714 } 1715 } 1716 } 1717 1718 return NULL; 1719 } 1720 1721 void pci_for_each_bus_depth_first(PCIBus *bus, 1722 void *(*begin)(PCIBus *bus, void *parent_state), 1723 void (*end)(PCIBus *bus, void *state), 1724 void *parent_state) 1725 { 1726 PCIBus *sec; 1727 void *state; 1728 1729 if (!bus) { 1730 return; 1731 } 1732 1733 if (begin) { 1734 state = begin(bus, parent_state); 1735 } else { 1736 state = parent_state; 1737 } 1738 1739 QLIST_FOREACH(sec, &bus->child, sibling) { 1740 pci_for_each_bus_depth_first(sec, begin, end, state); 1741 } 1742 1743 if (end) { 1744 end(bus, state); 1745 } 1746 } 1747 1748 1749 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn) 1750 { 1751 bus = pci_find_bus_nr(bus, bus_num); 1752 1753 if (!bus) 1754 return NULL; 1755 1756 return bus->devices[devfn]; 1757 } 1758 1759 static void pci_qdev_realize(DeviceState *qdev, Error **errp) 1760 { 1761 PCIDevice *pci_dev = (PCIDevice *)qdev; 1762 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev); 1763 Error *local_err = NULL; 1764 PCIBus *bus; 1765 bool is_default_rom; 1766 1767 /* initialize cap_present for pci_is_express() and pci_config_size() */ 1768 if (pc->is_express) { 1769 pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS; 1770 } 1771 1772 bus = PCI_BUS(qdev_get_parent_bus(qdev)); 1773 pci_dev = do_pci_register_device(pci_dev, bus, 1774 object_get_typename(OBJECT(qdev)), 1775 pci_dev->devfn, errp); 1776 if (pci_dev == NULL) 1777 return; 1778 1779 if (pc->realize) { 1780 pc->realize(pci_dev, &local_err); 1781 if (local_err) { 1782 error_propagate(errp, local_err); 1783 do_pci_unregister_device(pci_dev); 1784 return; 1785 } 1786 } 1787 1788 /* rom loading */ 1789 is_default_rom = false; 1790 if (pci_dev->romfile == NULL && pc->romfile != NULL) { 1791 pci_dev->romfile = g_strdup(pc->romfile); 1792 is_default_rom = true; 1793 } 1794 1795 pci_add_option_rom(pci_dev, is_default_rom, &local_err); 1796 if (local_err) { 1797 error_propagate(errp, local_err); 1798 pci_qdev_unrealize(DEVICE(pci_dev), NULL); 1799 return; 1800 } 1801 } 1802 1803 static void pci_default_realize(PCIDevice *dev, Error **errp) 1804 { 1805 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev); 1806 1807 if (pc->init) { 1808 if (pc->init(dev) < 0) { 1809 error_setg(errp, "Device initialization failed"); 1810 return; 1811 } 1812 } 1813 } 1814 1815 PCIDevice *pci_create_multifunction(PCIBus *bus, int devfn, bool multifunction, 1816 const char *name) 1817 { 1818 DeviceState *dev; 1819 1820 dev = qdev_create(&bus->qbus, name); 1821 qdev_prop_set_int32(dev, "addr", devfn); 1822 qdev_prop_set_bit(dev, "multifunction", multifunction); 1823 return PCI_DEVICE(dev); 1824 } 1825 1826 PCIDevice *pci_create_simple_multifunction(PCIBus *bus, int devfn, 1827 bool multifunction, 1828 const char *name) 1829 { 1830 PCIDevice *dev = pci_create_multifunction(bus, devfn, multifunction, name); 1831 qdev_init_nofail(&dev->qdev); 1832 return dev; 1833 } 1834 1835 PCIDevice *pci_create(PCIBus *bus, int devfn, const char *name) 1836 { 1837 return pci_create_multifunction(bus, devfn, false, name); 1838 } 1839 1840 PCIDevice *pci_create_simple(PCIBus *bus, int devfn, const char *name) 1841 { 1842 return pci_create_simple_multifunction(bus, devfn, false, name); 1843 } 1844 1845 static uint8_t pci_find_space(PCIDevice *pdev, uint8_t size) 1846 { 1847 int offset = PCI_CONFIG_HEADER_SIZE; 1848 int i; 1849 for (i = PCI_CONFIG_HEADER_SIZE; i < PCI_CONFIG_SPACE_SIZE; ++i) { 1850 if (pdev->used[i]) 1851 offset = i + 1; 1852 else if (i - offset + 1 == size) 1853 return offset; 1854 } 1855 return 0; 1856 } 1857 1858 static uint8_t pci_find_capability_list(PCIDevice *pdev, uint8_t cap_id, 1859 uint8_t *prev_p) 1860 { 1861 uint8_t next, prev; 1862 1863 if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST)) 1864 return 0; 1865 1866 for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]); 1867 prev = next + PCI_CAP_LIST_NEXT) 1868 if (pdev->config[next + PCI_CAP_LIST_ID] == cap_id) 1869 break; 1870 1871 if (prev_p) 1872 *prev_p = prev; 1873 return next; 1874 } 1875 1876 static uint8_t pci_find_capability_at_offset(PCIDevice *pdev, uint8_t offset) 1877 { 1878 uint8_t next, prev, found = 0; 1879 1880 if (!(pdev->used[offset])) { 1881 return 0; 1882 } 1883 1884 assert(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST); 1885 1886 for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]); 1887 prev = next + PCI_CAP_LIST_NEXT) { 1888 if (next <= offset && next > found) { 1889 found = next; 1890 } 1891 } 1892 return found; 1893 } 1894 1895 /* Patch the PCI vendor and device ids in a PCI rom image if necessary. 1896 This is needed for an option rom which is used for more than one device. */ 1897 static void pci_patch_ids(PCIDevice *pdev, uint8_t *ptr, int size) 1898 { 1899 uint16_t vendor_id; 1900 uint16_t device_id; 1901 uint16_t rom_vendor_id; 1902 uint16_t rom_device_id; 1903 uint16_t rom_magic; 1904 uint16_t pcir_offset; 1905 uint8_t checksum; 1906 1907 /* Words in rom data are little endian (like in PCI configuration), 1908 so they can be read / written with pci_get_word / pci_set_word. */ 1909 1910 /* Only a valid rom will be patched. */ 1911 rom_magic = pci_get_word(ptr); 1912 if (rom_magic != 0xaa55) { 1913 PCI_DPRINTF("Bad ROM magic %04x\n", rom_magic); 1914 return; 1915 } 1916 pcir_offset = pci_get_word(ptr + 0x18); 1917 if (pcir_offset + 8 >= size || memcmp(ptr + pcir_offset, "PCIR", 4)) { 1918 PCI_DPRINTF("Bad PCIR offset 0x%x or signature\n", pcir_offset); 1919 return; 1920 } 1921 1922 vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID); 1923 device_id = pci_get_word(pdev->config + PCI_DEVICE_ID); 1924 rom_vendor_id = pci_get_word(ptr + pcir_offset + 4); 1925 rom_device_id = pci_get_word(ptr + pcir_offset + 6); 1926 1927 PCI_DPRINTF("%s: ROM id %04x%04x / PCI id %04x%04x\n", pdev->romfile, 1928 vendor_id, device_id, rom_vendor_id, rom_device_id); 1929 1930 checksum = ptr[6]; 1931 1932 if (vendor_id != rom_vendor_id) { 1933 /* Patch vendor id and checksum (at offset 6 for etherboot roms). */ 1934 checksum += (uint8_t)rom_vendor_id + (uint8_t)(rom_vendor_id >> 8); 1935 checksum -= (uint8_t)vendor_id + (uint8_t)(vendor_id >> 8); 1936 PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum); 1937 ptr[6] = checksum; 1938 pci_set_word(ptr + pcir_offset + 4, vendor_id); 1939 } 1940 1941 if (device_id != rom_device_id) { 1942 /* Patch device id and checksum (at offset 6 for etherboot roms). */ 1943 checksum += (uint8_t)rom_device_id + (uint8_t)(rom_device_id >> 8); 1944 checksum -= (uint8_t)device_id + (uint8_t)(device_id >> 8); 1945 PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum); 1946 ptr[6] = checksum; 1947 pci_set_word(ptr + pcir_offset + 6, device_id); 1948 } 1949 } 1950 1951 /* Add an option rom for the device */ 1952 static void pci_add_option_rom(PCIDevice *pdev, bool is_default_rom, 1953 Error **errp) 1954 { 1955 int size; 1956 char *path; 1957 void *ptr; 1958 char name[32]; 1959 const VMStateDescription *vmsd; 1960 1961 if (!pdev->romfile) 1962 return; 1963 if (strlen(pdev->romfile) == 0) 1964 return; 1965 1966 if (!pdev->rom_bar) { 1967 /* 1968 * Load rom via fw_cfg instead of creating a rom bar, 1969 * for 0.11 compatibility. 1970 */ 1971 int class = pci_get_word(pdev->config + PCI_CLASS_DEVICE); 1972 1973 /* 1974 * Hot-plugged devices can't use the option ROM 1975 * if the rom bar is disabled. 1976 */ 1977 if (DEVICE(pdev)->hotplugged) { 1978 error_setg(errp, "Hot-plugged device without ROM bar" 1979 " can't have an option ROM"); 1980 return; 1981 } 1982 1983 if (class == 0x0300) { 1984 rom_add_vga(pdev->romfile); 1985 } else { 1986 rom_add_option(pdev->romfile, -1); 1987 } 1988 return; 1989 } 1990 1991 path = qemu_find_file(QEMU_FILE_TYPE_BIOS, pdev->romfile); 1992 if (path == NULL) { 1993 path = g_strdup(pdev->romfile); 1994 } 1995 1996 size = get_image_size(path); 1997 if (size < 0) { 1998 error_setg(errp, "failed to find romfile \"%s\"", pdev->romfile); 1999 g_free(path); 2000 return; 2001 } else if (size == 0) { 2002 error_setg(errp, "romfile \"%s\" is empty", pdev->romfile); 2003 g_free(path); 2004 return; 2005 } 2006 if (size & (size - 1)) { 2007 size = 1 << qemu_fls(size); 2008 } 2009 2010 vmsd = qdev_get_vmsd(DEVICE(pdev)); 2011 2012 if (vmsd) { 2013 snprintf(name, sizeof(name), "%s.rom", vmsd->name); 2014 } else { 2015 snprintf(name, sizeof(name), "%s.rom", object_get_typename(OBJECT(pdev))); 2016 } 2017 pdev->has_rom = true; 2018 memory_region_init_ram(&pdev->rom, OBJECT(pdev), name, size, &error_abort); 2019 vmstate_register_ram(&pdev->rom, &pdev->qdev); 2020 ptr = memory_region_get_ram_ptr(&pdev->rom); 2021 load_image(path, ptr); 2022 g_free(path); 2023 2024 if (is_default_rom) { 2025 /* Only the default rom images will be patched (if needed). */ 2026 pci_patch_ids(pdev, ptr, size); 2027 } 2028 2029 pci_register_bar(pdev, PCI_ROM_SLOT, 0, &pdev->rom); 2030 } 2031 2032 static void pci_del_option_rom(PCIDevice *pdev) 2033 { 2034 if (!pdev->has_rom) 2035 return; 2036 2037 vmstate_unregister_ram(&pdev->rom, &pdev->qdev); 2038 pdev->has_rom = false; 2039 } 2040 2041 /* 2042 * if !offset 2043 * Reserve space and add capability to the linked list in pci config space 2044 * 2045 * if offset = 0, 2046 * Find and reserve space and add capability to the linked list 2047 * in pci config space */ 2048 int pci_add_capability(PCIDevice *pdev, uint8_t cap_id, 2049 uint8_t offset, uint8_t size) 2050 { 2051 int ret; 2052 Error *local_err = NULL; 2053 2054 ret = pci_add_capability2(pdev, cap_id, offset, size, &local_err); 2055 if (local_err) { 2056 assert(ret < 0); 2057 error_report_err(local_err); 2058 } else { 2059 /* success implies a positive offset in config space */ 2060 assert(ret > 0); 2061 } 2062 return ret; 2063 } 2064 2065 int pci_add_capability2(PCIDevice *pdev, uint8_t cap_id, 2066 uint8_t offset, uint8_t size, 2067 Error **errp) 2068 { 2069 uint8_t *config; 2070 int i, overlapping_cap; 2071 2072 if (!offset) { 2073 offset = pci_find_space(pdev, size); 2074 if (!offset) { 2075 error_setg(errp, "out of PCI config space"); 2076 return -ENOSPC; 2077 } 2078 } else { 2079 /* Verify that capabilities don't overlap. Note: device assignment 2080 * depends on this check to verify that the device is not broken. 2081 * Should never trigger for emulated devices, but it's helpful 2082 * for debugging these. */ 2083 for (i = offset; i < offset + size; i++) { 2084 overlapping_cap = pci_find_capability_at_offset(pdev, i); 2085 if (overlapping_cap) { 2086 error_setg(errp, "%s:%02x:%02x.%x " 2087 "Attempt to add PCI capability %x at offset " 2088 "%x overlaps existing capability %x at offset %x", 2089 pci_root_bus_path(pdev), pci_bus_num(pdev->bus), 2090 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), 2091 cap_id, offset, overlapping_cap, i); 2092 return -EINVAL; 2093 } 2094 } 2095 } 2096 2097 config = pdev->config + offset; 2098 config[PCI_CAP_LIST_ID] = cap_id; 2099 config[PCI_CAP_LIST_NEXT] = pdev->config[PCI_CAPABILITY_LIST]; 2100 pdev->config[PCI_CAPABILITY_LIST] = offset; 2101 pdev->config[PCI_STATUS] |= PCI_STATUS_CAP_LIST; 2102 memset(pdev->used + offset, 0xFF, QEMU_ALIGN_UP(size, 4)); 2103 /* Make capability read-only by default */ 2104 memset(pdev->wmask + offset, 0, size); 2105 /* Check capability by default */ 2106 memset(pdev->cmask + offset, 0xFF, size); 2107 return offset; 2108 } 2109 2110 /* Unlink capability from the pci config space. */ 2111 void pci_del_capability(PCIDevice *pdev, uint8_t cap_id, uint8_t size) 2112 { 2113 uint8_t prev, offset = pci_find_capability_list(pdev, cap_id, &prev); 2114 if (!offset) 2115 return; 2116 pdev->config[prev] = pdev->config[offset + PCI_CAP_LIST_NEXT]; 2117 /* Make capability writable again */ 2118 memset(pdev->wmask + offset, 0xff, size); 2119 memset(pdev->w1cmask + offset, 0, size); 2120 /* Clear cmask as device-specific registers can't be checked */ 2121 memset(pdev->cmask + offset, 0, size); 2122 memset(pdev->used + offset, 0, QEMU_ALIGN_UP(size, 4)); 2123 2124 if (!pdev->config[PCI_CAPABILITY_LIST]) 2125 pdev->config[PCI_STATUS] &= ~PCI_STATUS_CAP_LIST; 2126 } 2127 2128 uint8_t pci_find_capability(PCIDevice *pdev, uint8_t cap_id) 2129 { 2130 return pci_find_capability_list(pdev, cap_id, NULL); 2131 } 2132 2133 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent) 2134 { 2135 PCIDevice *d = (PCIDevice *)dev; 2136 const pci_class_desc *desc; 2137 char ctxt[64]; 2138 PCIIORegion *r; 2139 int i, class; 2140 2141 class = pci_get_word(d->config + PCI_CLASS_DEVICE); 2142 desc = pci_class_descriptions; 2143 while (desc->desc && class != desc->class) 2144 desc++; 2145 if (desc->desc) { 2146 snprintf(ctxt, sizeof(ctxt), "%s", desc->desc); 2147 } else { 2148 snprintf(ctxt, sizeof(ctxt), "Class %04x", class); 2149 } 2150 2151 monitor_printf(mon, "%*sclass %s, addr %02x:%02x.%x, " 2152 "pci id %04x:%04x (sub %04x:%04x)\n", 2153 indent, "", ctxt, pci_bus_num(d->bus), 2154 PCI_SLOT(d->devfn), PCI_FUNC(d->devfn), 2155 pci_get_word(d->config + PCI_VENDOR_ID), 2156 pci_get_word(d->config + PCI_DEVICE_ID), 2157 pci_get_word(d->config + PCI_SUBSYSTEM_VENDOR_ID), 2158 pci_get_word(d->config + PCI_SUBSYSTEM_ID)); 2159 for (i = 0; i < PCI_NUM_REGIONS; i++) { 2160 r = &d->io_regions[i]; 2161 if (!r->size) 2162 continue; 2163 monitor_printf(mon, "%*sbar %d: %s at 0x%"FMT_PCIBUS 2164 " [0x%"FMT_PCIBUS"]\n", 2165 indent, "", 2166 i, r->type & PCI_BASE_ADDRESS_SPACE_IO ? "i/o" : "mem", 2167 r->addr, r->addr + r->size - 1); 2168 } 2169 } 2170 2171 static char *pci_dev_fw_name(DeviceState *dev, char *buf, int len) 2172 { 2173 PCIDevice *d = (PCIDevice *)dev; 2174 const char *name = NULL; 2175 const pci_class_desc *desc = pci_class_descriptions; 2176 int class = pci_get_word(d->config + PCI_CLASS_DEVICE); 2177 2178 while (desc->desc && 2179 (class & ~desc->fw_ign_bits) != 2180 (desc->class & ~desc->fw_ign_bits)) { 2181 desc++; 2182 } 2183 2184 if (desc->desc) { 2185 name = desc->fw_name; 2186 } 2187 2188 if (name) { 2189 pstrcpy(buf, len, name); 2190 } else { 2191 snprintf(buf, len, "pci%04x,%04x", 2192 pci_get_word(d->config + PCI_VENDOR_ID), 2193 pci_get_word(d->config + PCI_DEVICE_ID)); 2194 } 2195 2196 return buf; 2197 } 2198 2199 static char *pcibus_get_fw_dev_path(DeviceState *dev) 2200 { 2201 PCIDevice *d = (PCIDevice *)dev; 2202 char path[50], name[33]; 2203 int off; 2204 2205 off = snprintf(path, sizeof(path), "%s@%x", 2206 pci_dev_fw_name(dev, name, sizeof name), 2207 PCI_SLOT(d->devfn)); 2208 if (PCI_FUNC(d->devfn)) 2209 snprintf(path + off, sizeof(path) + off, ",%x", PCI_FUNC(d->devfn)); 2210 return g_strdup(path); 2211 } 2212 2213 static char *pcibus_get_dev_path(DeviceState *dev) 2214 { 2215 PCIDevice *d = container_of(dev, PCIDevice, qdev); 2216 PCIDevice *t; 2217 int slot_depth; 2218 /* Path format: Domain:00:Slot.Function:Slot.Function....:Slot.Function. 2219 * 00 is added here to make this format compatible with 2220 * domain:Bus:Slot.Func for systems without nested PCI bridges. 2221 * Slot.Function list specifies the slot and function numbers for all 2222 * devices on the path from root to the specific device. */ 2223 const char *root_bus_path; 2224 int root_bus_len; 2225 char slot[] = ":SS.F"; 2226 int slot_len = sizeof slot - 1 /* For '\0' */; 2227 int path_len; 2228 char *path, *p; 2229 int s; 2230 2231 root_bus_path = pci_root_bus_path(d); 2232 root_bus_len = strlen(root_bus_path); 2233 2234 /* Calculate # of slots on path between device and root. */; 2235 slot_depth = 0; 2236 for (t = d; t; t = t->bus->parent_dev) { 2237 ++slot_depth; 2238 } 2239 2240 path_len = root_bus_len + slot_len * slot_depth; 2241 2242 /* Allocate memory, fill in the terminating null byte. */ 2243 path = g_malloc(path_len + 1 /* For '\0' */); 2244 path[path_len] = '\0'; 2245 2246 memcpy(path, root_bus_path, root_bus_len); 2247 2248 /* Fill in slot numbers. We walk up from device to root, so need to print 2249 * them in the reverse order, last to first. */ 2250 p = path + path_len; 2251 for (t = d; t; t = t->bus->parent_dev) { 2252 p -= slot_len; 2253 s = snprintf(slot, sizeof slot, ":%02x.%x", 2254 PCI_SLOT(t->devfn), PCI_FUNC(t->devfn)); 2255 assert(s == slot_len); 2256 memcpy(p, slot, slot_len); 2257 } 2258 2259 return path; 2260 } 2261 2262 static int pci_qdev_find_recursive(PCIBus *bus, 2263 const char *id, PCIDevice **pdev) 2264 { 2265 DeviceState *qdev = qdev_find_recursive(&bus->qbus, id); 2266 if (!qdev) { 2267 return -ENODEV; 2268 } 2269 2270 /* roughly check if given qdev is pci device */ 2271 if (object_dynamic_cast(OBJECT(qdev), TYPE_PCI_DEVICE)) { 2272 *pdev = PCI_DEVICE(qdev); 2273 return 0; 2274 } 2275 return -EINVAL; 2276 } 2277 2278 int pci_qdev_find_device(const char *id, PCIDevice **pdev) 2279 { 2280 PCIHostState *host_bridge; 2281 int rc = -ENODEV; 2282 2283 QLIST_FOREACH(host_bridge, &pci_host_bridges, next) { 2284 int tmp = pci_qdev_find_recursive(host_bridge->bus, id, pdev); 2285 if (!tmp) { 2286 rc = 0; 2287 break; 2288 } 2289 if (tmp != -ENODEV) { 2290 rc = tmp; 2291 } 2292 } 2293 2294 return rc; 2295 } 2296 2297 MemoryRegion *pci_address_space(PCIDevice *dev) 2298 { 2299 return dev->bus->address_space_mem; 2300 } 2301 2302 MemoryRegion *pci_address_space_io(PCIDevice *dev) 2303 { 2304 return dev->bus->address_space_io; 2305 } 2306 2307 static void pci_device_class_init(ObjectClass *klass, void *data) 2308 { 2309 DeviceClass *k = DEVICE_CLASS(klass); 2310 PCIDeviceClass *pc = PCI_DEVICE_CLASS(klass); 2311 2312 k->realize = pci_qdev_realize; 2313 k->unrealize = pci_qdev_unrealize; 2314 k->bus_type = TYPE_PCI_BUS; 2315 k->props = pci_props; 2316 pc->realize = pci_default_realize; 2317 } 2318 2319 AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) 2320 { 2321 PCIBus *bus = PCI_BUS(dev->bus); 2322 2323 if (bus->iommu_fn) { 2324 return bus->iommu_fn(bus, bus->iommu_opaque, dev->devfn); 2325 } 2326 2327 if (bus->parent_dev) { 2328 /** We are ignoring the bus master DMA bit of the bridge 2329 * as it would complicate things such as VFIO for no good reason */ 2330 return pci_device_iommu_address_space(bus->parent_dev); 2331 } 2332 2333 return &address_space_memory; 2334 } 2335 2336 void pci_setup_iommu(PCIBus *bus, PCIIOMMUFunc fn, void *opaque) 2337 { 2338 bus->iommu_fn = fn; 2339 bus->iommu_opaque = opaque; 2340 } 2341 2342 static void pci_dev_get_w64(PCIBus *b, PCIDevice *dev, void *opaque) 2343 { 2344 Range *range = opaque; 2345 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev); 2346 uint16_t cmd = pci_get_word(dev->config + PCI_COMMAND); 2347 int i; 2348 2349 if (!(cmd & PCI_COMMAND_MEMORY)) { 2350 return; 2351 } 2352 2353 if (pc->is_bridge) { 2354 pcibus_t base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH); 2355 pcibus_t limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH); 2356 2357 base = MAX(base, 0x1ULL << 32); 2358 2359 if (limit >= base) { 2360 Range pref_range; 2361 pref_range.begin = base; 2362 pref_range.end = limit + 1; 2363 range_extend(range, &pref_range); 2364 } 2365 } 2366 for (i = 0; i < PCI_NUM_REGIONS; ++i) { 2367 PCIIORegion *r = &dev->io_regions[i]; 2368 Range region_range; 2369 2370 if (!r->size || 2371 (r->type & PCI_BASE_ADDRESS_SPACE_IO) || 2372 !(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64)) { 2373 continue; 2374 } 2375 region_range.begin = pci_bar_address(dev, i, r->type, r->size); 2376 region_range.end = region_range.begin + r->size; 2377 2378 if (region_range.begin == PCI_BAR_UNMAPPED) { 2379 continue; 2380 } 2381 2382 region_range.begin = MAX(region_range.begin, 0x1ULL << 32); 2383 2384 if (region_range.end - 1 >= region_range.begin) { 2385 range_extend(range, ®ion_range); 2386 } 2387 } 2388 } 2389 2390 void pci_bus_get_w64_range(PCIBus *bus, Range *range) 2391 { 2392 range->begin = range->end = 0; 2393 pci_for_each_device_under_bus(bus, pci_dev_get_w64, range); 2394 } 2395 2396 static const TypeInfo pci_device_type_info = { 2397 .name = TYPE_PCI_DEVICE, 2398 .parent = TYPE_DEVICE, 2399 .instance_size = sizeof(PCIDevice), 2400 .abstract = true, 2401 .class_size = sizeof(PCIDeviceClass), 2402 .class_init = pci_device_class_init, 2403 }; 2404 2405 static void pci_register_types(void) 2406 { 2407 type_register_static(&pci_bus_info); 2408 type_register_static(&pcie_bus_info); 2409 type_register_static(&pci_device_type_info); 2410 } 2411 2412 type_init(pci_register_types) 2413