1 /* 2 * QEMU PCI bus manager 3 * 4 * Copyright (c) 2004 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include "hw/hw.h" 25 #include "hw/pci/pci.h" 26 #include "hw/pci/pci_bridge.h" 27 #include "hw/pci/pci_bus.h" 28 #include "hw/pci/pci_host.h" 29 #include "monitor/monitor.h" 30 #include "net/net.h" 31 #include "sysemu/sysemu.h" 32 #include "hw/loader.h" 33 #include "qemu/range.h" 34 #include "qmp-commands.h" 35 #include "hw/pci/msi.h" 36 #include "hw/pci/msix.h" 37 #include "exec/address-spaces.h" 38 39 //#define DEBUG_PCI 40 #ifdef DEBUG_PCI 41 # define PCI_DPRINTF(format, ...) printf(format, ## __VA_ARGS__) 42 #else 43 # define PCI_DPRINTF(format, ...) do { } while (0) 44 #endif 45 46 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent); 47 static char *pcibus_get_dev_path(DeviceState *dev); 48 static char *pcibus_get_fw_dev_path(DeviceState *dev); 49 static int pcibus_reset(BusState *qbus); 50 51 static Property pci_props[] = { 52 DEFINE_PROP_PCI_DEVFN("addr", PCIDevice, devfn, -1), 53 DEFINE_PROP_STRING("romfile", PCIDevice, romfile), 54 DEFINE_PROP_UINT32("rombar", PCIDevice, rom_bar, 1), 55 DEFINE_PROP_BIT("multifunction", PCIDevice, cap_present, 56 QEMU_PCI_CAP_MULTIFUNCTION_BITNR, false), 57 DEFINE_PROP_BIT("command_serr_enable", PCIDevice, cap_present, 58 QEMU_PCI_CAP_SERR_BITNR, true), 59 DEFINE_PROP_END_OF_LIST() 60 }; 61 62 static void pci_bus_class_init(ObjectClass *klass, void *data) 63 { 64 BusClass *k = BUS_CLASS(klass); 65 66 k->print_dev = pcibus_dev_print; 67 k->get_dev_path = pcibus_get_dev_path; 68 k->get_fw_dev_path = pcibus_get_fw_dev_path; 69 k->reset = pcibus_reset; 70 } 71 72 static const TypeInfo pci_bus_info = { 73 .name = TYPE_PCI_BUS, 74 .parent = TYPE_BUS, 75 .instance_size = sizeof(PCIBus), 76 .class_init = pci_bus_class_init, 77 }; 78 79 static const TypeInfo pcie_bus_info = { 80 .name = TYPE_PCIE_BUS, 81 .parent = TYPE_PCI_BUS, 82 }; 83 84 static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num); 85 static void pci_update_mappings(PCIDevice *d); 86 static void pci_set_irq(void *opaque, int irq_num, int level); 87 static int pci_add_option_rom(PCIDevice *pdev, bool is_default_rom); 88 static void pci_del_option_rom(PCIDevice *pdev); 89 90 static uint16_t pci_default_sub_vendor_id = PCI_SUBVENDOR_ID_REDHAT_QUMRANET; 91 static uint16_t pci_default_sub_device_id = PCI_SUBDEVICE_ID_QEMU; 92 93 static QLIST_HEAD(, PCIHostState) pci_host_bridges; 94 95 static const VMStateDescription vmstate_pcibus = { 96 .name = "PCIBUS", 97 .version_id = 1, 98 .minimum_version_id = 1, 99 .minimum_version_id_old = 1, 100 .fields = (VMStateField []) { 101 VMSTATE_INT32_EQUAL(nirq, PCIBus), 102 VMSTATE_VARRAY_INT32(irq_count, PCIBus, nirq, 0, vmstate_info_int32, int32_t), 103 VMSTATE_END_OF_LIST() 104 } 105 }; 106 static int pci_bar(PCIDevice *d, int reg) 107 { 108 uint8_t type; 109 110 if (reg != PCI_ROM_SLOT) 111 return PCI_BASE_ADDRESS_0 + reg * 4; 112 113 type = d->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION; 114 return type == PCI_HEADER_TYPE_BRIDGE ? PCI_ROM_ADDRESS1 : PCI_ROM_ADDRESS; 115 } 116 117 static inline int pci_irq_state(PCIDevice *d, int irq_num) 118 { 119 return (d->irq_state >> irq_num) & 0x1; 120 } 121 122 static inline void pci_set_irq_state(PCIDevice *d, int irq_num, int level) 123 { 124 d->irq_state &= ~(0x1 << irq_num); 125 d->irq_state |= level << irq_num; 126 } 127 128 static void pci_change_irq_level(PCIDevice *pci_dev, int irq_num, int change) 129 { 130 PCIBus *bus; 131 for (;;) { 132 bus = pci_dev->bus; 133 irq_num = bus->map_irq(pci_dev, irq_num); 134 if (bus->set_irq) 135 break; 136 pci_dev = bus->parent_dev; 137 } 138 bus->irq_count[irq_num] += change; 139 bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0); 140 } 141 142 int pci_bus_get_irq_level(PCIBus *bus, int irq_num) 143 { 144 assert(irq_num >= 0); 145 assert(irq_num < bus->nirq); 146 return !!bus->irq_count[irq_num]; 147 } 148 149 /* Update interrupt status bit in config space on interrupt 150 * state change. */ 151 static void pci_update_irq_status(PCIDevice *dev) 152 { 153 if (dev->irq_state) { 154 dev->config[PCI_STATUS] |= PCI_STATUS_INTERRUPT; 155 } else { 156 dev->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT; 157 } 158 } 159 160 void pci_device_deassert_intx(PCIDevice *dev) 161 { 162 int i; 163 for (i = 0; i < PCI_NUM_PINS; ++i) { 164 qemu_set_irq(dev->irq[i], 0); 165 } 166 } 167 168 /* 169 * This function is called on #RST and FLR. 170 * FLR if PCI_EXP_DEVCTL_BCR_FLR is set 171 */ 172 void pci_device_reset(PCIDevice *dev) 173 { 174 int r; 175 176 qdev_reset_all(&dev->qdev); 177 178 dev->irq_state = 0; 179 pci_update_irq_status(dev); 180 pci_device_deassert_intx(dev); 181 /* Clear all writable bits */ 182 pci_word_test_and_clear_mask(dev->config + PCI_COMMAND, 183 pci_get_word(dev->wmask + PCI_COMMAND) | 184 pci_get_word(dev->w1cmask + PCI_COMMAND)); 185 pci_word_test_and_clear_mask(dev->config + PCI_STATUS, 186 pci_get_word(dev->wmask + PCI_STATUS) | 187 pci_get_word(dev->w1cmask + PCI_STATUS)); 188 dev->config[PCI_CACHE_LINE_SIZE] = 0x0; 189 dev->config[PCI_INTERRUPT_LINE] = 0x0; 190 for (r = 0; r < PCI_NUM_REGIONS; ++r) { 191 PCIIORegion *region = &dev->io_regions[r]; 192 if (!region->size) { 193 continue; 194 } 195 196 if (!(region->type & PCI_BASE_ADDRESS_SPACE_IO) && 197 region->type & PCI_BASE_ADDRESS_MEM_TYPE_64) { 198 pci_set_quad(dev->config + pci_bar(dev, r), region->type); 199 } else { 200 pci_set_long(dev->config + pci_bar(dev, r), region->type); 201 } 202 } 203 pci_update_mappings(dev); 204 205 msi_reset(dev); 206 msix_reset(dev); 207 } 208 209 /* 210 * Trigger pci bus reset under a given bus. 211 * To be called on RST# assert. 212 */ 213 void pci_bus_reset(PCIBus *bus) 214 { 215 int i; 216 217 for (i = 0; i < bus->nirq; i++) { 218 bus->irq_count[i] = 0; 219 } 220 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { 221 if (bus->devices[i]) { 222 pci_device_reset(bus->devices[i]); 223 } 224 } 225 } 226 227 static int pcibus_reset(BusState *qbus) 228 { 229 pci_bus_reset(DO_UPCAST(PCIBus, qbus, qbus)); 230 231 /* topology traverse is done by pci_bus_reset(). 232 Tell qbus/qdev walker not to traverse the tree */ 233 return 1; 234 } 235 236 static void pci_host_bus_register(PCIBus *bus, DeviceState *parent) 237 { 238 PCIHostState *host_bridge = PCI_HOST_BRIDGE(parent); 239 240 QLIST_INSERT_HEAD(&pci_host_bridges, host_bridge, next); 241 } 242 243 PCIBus *pci_find_primary_bus(void) 244 { 245 PCIBus *primary_bus = NULL; 246 PCIHostState *host; 247 248 QLIST_FOREACH(host, &pci_host_bridges, next) { 249 if (primary_bus) { 250 /* We have multiple root buses, refuse to select a primary */ 251 return NULL; 252 } 253 primary_bus = host->bus; 254 } 255 256 return primary_bus; 257 } 258 259 PCIBus *pci_device_root_bus(const PCIDevice *d) 260 { 261 PCIBus *bus = d->bus; 262 263 while ((d = bus->parent_dev) != NULL) { 264 bus = d->bus; 265 } 266 267 return bus; 268 } 269 270 const char *pci_root_bus_path(PCIDevice *dev) 271 { 272 PCIBus *rootbus = pci_device_root_bus(dev); 273 PCIHostState *host_bridge = PCI_HOST_BRIDGE(rootbus->qbus.parent); 274 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_GET_CLASS(host_bridge); 275 276 assert(!rootbus->parent_dev); 277 assert(host_bridge->bus == rootbus); 278 279 if (hc->root_bus_path) { 280 return (*hc->root_bus_path)(host_bridge, rootbus); 281 } 282 283 return rootbus->qbus.name; 284 } 285 286 static void pci_bus_init(PCIBus *bus, DeviceState *parent, 287 const char *name, 288 MemoryRegion *address_space_mem, 289 MemoryRegion *address_space_io, 290 uint8_t devfn_min) 291 { 292 assert(PCI_FUNC(devfn_min) == 0); 293 bus->devfn_min = devfn_min; 294 bus->address_space_mem = address_space_mem; 295 bus->address_space_io = address_space_io; 296 297 /* host bridge */ 298 QLIST_INIT(&bus->child); 299 300 pci_host_bus_register(bus, parent); 301 302 vmstate_register(NULL, -1, &vmstate_pcibus, bus); 303 } 304 305 bool pci_bus_is_express(PCIBus *bus) 306 { 307 return object_dynamic_cast(OBJECT(bus), TYPE_PCIE_BUS); 308 } 309 310 bool pci_bus_is_root(PCIBus *bus) 311 { 312 return !bus->parent_dev; 313 } 314 315 void pci_bus_new_inplace(PCIBus *bus, size_t bus_size, DeviceState *parent, 316 const char *name, 317 MemoryRegion *address_space_mem, 318 MemoryRegion *address_space_io, 319 uint8_t devfn_min, const char *typename) 320 { 321 qbus_create_inplace(bus, bus_size, typename, parent, name); 322 pci_bus_init(bus, parent, name, address_space_mem, 323 address_space_io, devfn_min); 324 } 325 326 PCIBus *pci_bus_new(DeviceState *parent, const char *name, 327 MemoryRegion *address_space_mem, 328 MemoryRegion *address_space_io, 329 uint8_t devfn_min, const char *typename) 330 { 331 PCIBus *bus; 332 333 bus = PCI_BUS(qbus_create(typename, parent, name)); 334 pci_bus_init(bus, parent, name, address_space_mem, 335 address_space_io, devfn_min); 336 return bus; 337 } 338 339 void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq, 340 void *irq_opaque, int nirq) 341 { 342 bus->set_irq = set_irq; 343 bus->map_irq = map_irq; 344 bus->irq_opaque = irq_opaque; 345 bus->nirq = nirq; 346 bus->irq_count = g_malloc0(nirq * sizeof(bus->irq_count[0])); 347 } 348 349 void pci_bus_hotplug(PCIBus *bus, pci_hotplug_fn hotplug, DeviceState *qdev) 350 { 351 bus->qbus.allow_hotplug = 1; 352 bus->hotplug = hotplug; 353 bus->hotplug_qdev = qdev; 354 } 355 356 PCIBus *pci_register_bus(DeviceState *parent, const char *name, 357 pci_set_irq_fn set_irq, pci_map_irq_fn map_irq, 358 void *irq_opaque, 359 MemoryRegion *address_space_mem, 360 MemoryRegion *address_space_io, 361 uint8_t devfn_min, int nirq, const char *typename) 362 { 363 PCIBus *bus; 364 365 bus = pci_bus_new(parent, name, address_space_mem, 366 address_space_io, devfn_min, typename); 367 pci_bus_irqs(bus, set_irq, map_irq, irq_opaque, nirq); 368 return bus; 369 } 370 371 int pci_bus_num(PCIBus *s) 372 { 373 if (pci_bus_is_root(s)) 374 return 0; /* pci host bridge */ 375 return s->parent_dev->config[PCI_SECONDARY_BUS]; 376 } 377 378 static int get_pci_config_device(QEMUFile *f, void *pv, size_t size) 379 { 380 PCIDevice *s = container_of(pv, PCIDevice, config); 381 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(s); 382 uint8_t *config; 383 int i; 384 385 assert(size == pci_config_size(s)); 386 config = g_malloc(size); 387 388 qemu_get_buffer(f, config, size); 389 for (i = 0; i < size; ++i) { 390 if ((config[i] ^ s->config[i]) & 391 s->cmask[i] & ~s->wmask[i] & ~s->w1cmask[i]) { 392 g_free(config); 393 return -EINVAL; 394 } 395 } 396 memcpy(s->config, config, size); 397 398 pci_update_mappings(s); 399 if (pc->is_bridge) { 400 PCIBridge *b = PCI_BRIDGE(s); 401 pci_bridge_update_mappings(b); 402 } 403 404 memory_region_set_enabled(&s->bus_master_enable_region, 405 pci_get_word(s->config + PCI_COMMAND) 406 & PCI_COMMAND_MASTER); 407 408 g_free(config); 409 return 0; 410 } 411 412 /* just put buffer */ 413 static void put_pci_config_device(QEMUFile *f, void *pv, size_t size) 414 { 415 const uint8_t **v = pv; 416 assert(size == pci_config_size(container_of(pv, PCIDevice, config))); 417 qemu_put_buffer(f, *v, size); 418 } 419 420 static VMStateInfo vmstate_info_pci_config = { 421 .name = "pci config", 422 .get = get_pci_config_device, 423 .put = put_pci_config_device, 424 }; 425 426 static int get_pci_irq_state(QEMUFile *f, void *pv, size_t size) 427 { 428 PCIDevice *s = container_of(pv, PCIDevice, irq_state); 429 uint32_t irq_state[PCI_NUM_PINS]; 430 int i; 431 for (i = 0; i < PCI_NUM_PINS; ++i) { 432 irq_state[i] = qemu_get_be32(f); 433 if (irq_state[i] != 0x1 && irq_state[i] != 0) { 434 fprintf(stderr, "irq state %d: must be 0 or 1.\n", 435 irq_state[i]); 436 return -EINVAL; 437 } 438 } 439 440 for (i = 0; i < PCI_NUM_PINS; ++i) { 441 pci_set_irq_state(s, i, irq_state[i]); 442 } 443 444 return 0; 445 } 446 447 static void put_pci_irq_state(QEMUFile *f, void *pv, size_t size) 448 { 449 int i; 450 PCIDevice *s = container_of(pv, PCIDevice, irq_state); 451 452 for (i = 0; i < PCI_NUM_PINS; ++i) { 453 qemu_put_be32(f, pci_irq_state(s, i)); 454 } 455 } 456 457 static VMStateInfo vmstate_info_pci_irq_state = { 458 .name = "pci irq state", 459 .get = get_pci_irq_state, 460 .put = put_pci_irq_state, 461 }; 462 463 const VMStateDescription vmstate_pci_device = { 464 .name = "PCIDevice", 465 .version_id = 2, 466 .minimum_version_id = 1, 467 .minimum_version_id_old = 1, 468 .fields = (VMStateField []) { 469 VMSTATE_INT32_LE(version_id, PCIDevice), 470 VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0, 471 vmstate_info_pci_config, 472 PCI_CONFIG_SPACE_SIZE), 473 VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2, 474 vmstate_info_pci_irq_state, 475 PCI_NUM_PINS * sizeof(int32_t)), 476 VMSTATE_END_OF_LIST() 477 } 478 }; 479 480 const VMStateDescription vmstate_pcie_device = { 481 .name = "PCIEDevice", 482 .version_id = 2, 483 .minimum_version_id = 1, 484 .minimum_version_id_old = 1, 485 .fields = (VMStateField []) { 486 VMSTATE_INT32_LE(version_id, PCIDevice), 487 VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0, 488 vmstate_info_pci_config, 489 PCIE_CONFIG_SPACE_SIZE), 490 VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2, 491 vmstate_info_pci_irq_state, 492 PCI_NUM_PINS * sizeof(int32_t)), 493 VMSTATE_END_OF_LIST() 494 } 495 }; 496 497 static inline const VMStateDescription *pci_get_vmstate(PCIDevice *s) 498 { 499 return pci_is_express(s) ? &vmstate_pcie_device : &vmstate_pci_device; 500 } 501 502 void pci_device_save(PCIDevice *s, QEMUFile *f) 503 { 504 /* Clear interrupt status bit: it is implicit 505 * in irq_state which we are saving. 506 * This makes us compatible with old devices 507 * which never set or clear this bit. */ 508 s->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT; 509 vmstate_save_state(f, pci_get_vmstate(s), s); 510 /* Restore the interrupt status bit. */ 511 pci_update_irq_status(s); 512 } 513 514 int pci_device_load(PCIDevice *s, QEMUFile *f) 515 { 516 int ret; 517 ret = vmstate_load_state(f, pci_get_vmstate(s), s, s->version_id); 518 /* Restore the interrupt status bit. */ 519 pci_update_irq_status(s); 520 return ret; 521 } 522 523 static void pci_set_default_subsystem_id(PCIDevice *pci_dev) 524 { 525 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID, 526 pci_default_sub_vendor_id); 527 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID, 528 pci_default_sub_device_id); 529 } 530 531 /* 532 * Parse [[<domain>:]<bus>:]<slot>, return -1 on error if funcp == NULL 533 * [[<domain>:]<bus>:]<slot>.<func>, return -1 on error 534 */ 535 int pci_parse_devaddr(const char *addr, int *domp, int *busp, 536 unsigned int *slotp, unsigned int *funcp) 537 { 538 const char *p; 539 char *e; 540 unsigned long val; 541 unsigned long dom = 0, bus = 0; 542 unsigned int slot = 0; 543 unsigned int func = 0; 544 545 p = addr; 546 val = strtoul(p, &e, 16); 547 if (e == p) 548 return -1; 549 if (*e == ':') { 550 bus = val; 551 p = e + 1; 552 val = strtoul(p, &e, 16); 553 if (e == p) 554 return -1; 555 if (*e == ':') { 556 dom = bus; 557 bus = val; 558 p = e + 1; 559 val = strtoul(p, &e, 16); 560 if (e == p) 561 return -1; 562 } 563 } 564 565 slot = val; 566 567 if (funcp != NULL) { 568 if (*e != '.') 569 return -1; 570 571 p = e + 1; 572 val = strtoul(p, &e, 16); 573 if (e == p) 574 return -1; 575 576 func = val; 577 } 578 579 /* if funcp == NULL func is 0 */ 580 if (dom > 0xffff || bus > 0xff || slot > 0x1f || func > 7) 581 return -1; 582 583 if (*e) 584 return -1; 585 586 *domp = dom; 587 *busp = bus; 588 *slotp = slot; 589 if (funcp != NULL) 590 *funcp = func; 591 return 0; 592 } 593 594 PCIBus *pci_get_bus_devfn(int *devfnp, PCIBus *root, const char *devaddr) 595 { 596 int dom, bus; 597 unsigned slot; 598 599 assert(!root->parent_dev); 600 601 if (!root) { 602 fprintf(stderr, "No primary PCI bus\n"); 603 return NULL; 604 } 605 606 if (!devaddr) { 607 *devfnp = -1; 608 return pci_find_bus_nr(root, 0); 609 } 610 611 if (pci_parse_devaddr(devaddr, &dom, &bus, &slot, NULL) < 0) { 612 return NULL; 613 } 614 615 if (dom != 0) { 616 fprintf(stderr, "No support for non-zero PCI domains\n"); 617 return NULL; 618 } 619 620 *devfnp = PCI_DEVFN(slot, 0); 621 return pci_find_bus_nr(root, bus); 622 } 623 624 static void pci_init_cmask(PCIDevice *dev) 625 { 626 pci_set_word(dev->cmask + PCI_VENDOR_ID, 0xffff); 627 pci_set_word(dev->cmask + PCI_DEVICE_ID, 0xffff); 628 dev->cmask[PCI_STATUS] = PCI_STATUS_CAP_LIST; 629 dev->cmask[PCI_REVISION_ID] = 0xff; 630 dev->cmask[PCI_CLASS_PROG] = 0xff; 631 pci_set_word(dev->cmask + PCI_CLASS_DEVICE, 0xffff); 632 dev->cmask[PCI_HEADER_TYPE] = 0xff; 633 dev->cmask[PCI_CAPABILITY_LIST] = 0xff; 634 } 635 636 static void pci_init_wmask(PCIDevice *dev) 637 { 638 int config_size = pci_config_size(dev); 639 640 dev->wmask[PCI_CACHE_LINE_SIZE] = 0xff; 641 dev->wmask[PCI_INTERRUPT_LINE] = 0xff; 642 pci_set_word(dev->wmask + PCI_COMMAND, 643 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | 644 PCI_COMMAND_INTX_DISABLE); 645 if (dev->cap_present & QEMU_PCI_CAP_SERR) { 646 pci_word_test_and_set_mask(dev->wmask + PCI_COMMAND, PCI_COMMAND_SERR); 647 } 648 649 memset(dev->wmask + PCI_CONFIG_HEADER_SIZE, 0xff, 650 config_size - PCI_CONFIG_HEADER_SIZE); 651 } 652 653 static void pci_init_w1cmask(PCIDevice *dev) 654 { 655 /* 656 * Note: It's okay to set w1cmask even for readonly bits as 657 * long as their value is hardwired to 0. 658 */ 659 pci_set_word(dev->w1cmask + PCI_STATUS, 660 PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT | 661 PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT | 662 PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY); 663 } 664 665 static void pci_init_mask_bridge(PCIDevice *d) 666 { 667 /* PCI_PRIMARY_BUS, PCI_SECONDARY_BUS, PCI_SUBORDINATE_BUS and 668 PCI_SEC_LETENCY_TIMER */ 669 memset(d->wmask + PCI_PRIMARY_BUS, 0xff, 4); 670 671 /* base and limit */ 672 d->wmask[PCI_IO_BASE] = PCI_IO_RANGE_MASK & 0xff; 673 d->wmask[PCI_IO_LIMIT] = PCI_IO_RANGE_MASK & 0xff; 674 pci_set_word(d->wmask + PCI_MEMORY_BASE, 675 PCI_MEMORY_RANGE_MASK & 0xffff); 676 pci_set_word(d->wmask + PCI_MEMORY_LIMIT, 677 PCI_MEMORY_RANGE_MASK & 0xffff); 678 pci_set_word(d->wmask + PCI_PREF_MEMORY_BASE, 679 PCI_PREF_RANGE_MASK & 0xffff); 680 pci_set_word(d->wmask + PCI_PREF_MEMORY_LIMIT, 681 PCI_PREF_RANGE_MASK & 0xffff); 682 683 /* PCI_PREF_BASE_UPPER32 and PCI_PREF_LIMIT_UPPER32 */ 684 memset(d->wmask + PCI_PREF_BASE_UPPER32, 0xff, 8); 685 686 /* Supported memory and i/o types */ 687 d->config[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_16; 688 d->config[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_16; 689 pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_BASE, 690 PCI_PREF_RANGE_TYPE_64); 691 pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_LIMIT, 692 PCI_PREF_RANGE_TYPE_64); 693 694 /* 695 * TODO: Bridges default to 10-bit VGA decoding but we currently only 696 * implement 16-bit decoding (no alias support). 697 */ 698 pci_set_word(d->wmask + PCI_BRIDGE_CONTROL, 699 PCI_BRIDGE_CTL_PARITY | 700 PCI_BRIDGE_CTL_SERR | 701 PCI_BRIDGE_CTL_ISA | 702 PCI_BRIDGE_CTL_VGA | 703 PCI_BRIDGE_CTL_VGA_16BIT | 704 PCI_BRIDGE_CTL_MASTER_ABORT | 705 PCI_BRIDGE_CTL_BUS_RESET | 706 PCI_BRIDGE_CTL_FAST_BACK | 707 PCI_BRIDGE_CTL_DISCARD | 708 PCI_BRIDGE_CTL_SEC_DISCARD | 709 PCI_BRIDGE_CTL_DISCARD_SERR); 710 /* Below does not do anything as we never set this bit, put here for 711 * completeness. */ 712 pci_set_word(d->w1cmask + PCI_BRIDGE_CONTROL, 713 PCI_BRIDGE_CTL_DISCARD_STATUS); 714 d->cmask[PCI_IO_BASE] |= PCI_IO_RANGE_TYPE_MASK; 715 d->cmask[PCI_IO_LIMIT] |= PCI_IO_RANGE_TYPE_MASK; 716 pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_BASE, 717 PCI_PREF_RANGE_TYPE_MASK); 718 pci_word_test_and_set_mask(d->cmask + PCI_PREF_MEMORY_LIMIT, 719 PCI_PREF_RANGE_TYPE_MASK); 720 } 721 722 static int pci_init_multifunction(PCIBus *bus, PCIDevice *dev) 723 { 724 uint8_t slot = PCI_SLOT(dev->devfn); 725 uint8_t func; 726 727 if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { 728 dev->config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION; 729 } 730 731 /* 732 * multifunction bit is interpreted in two ways as follows. 733 * - all functions must set the bit to 1. 734 * Example: Intel X53 735 * - function 0 must set the bit, but the rest function (> 0) 736 * is allowed to leave the bit to 0. 737 * Example: PIIX3(also in qemu), PIIX4(also in qemu), ICH10, 738 * 739 * So OS (at least Linux) checks the bit of only function 0, 740 * and doesn't see the bit of function > 0. 741 * 742 * The below check allows both interpretation. 743 */ 744 if (PCI_FUNC(dev->devfn)) { 745 PCIDevice *f0 = bus->devices[PCI_DEVFN(slot, 0)]; 746 if (f0 && !(f0->cap_present & QEMU_PCI_CAP_MULTIFUNCTION)) { 747 /* function 0 should set multifunction bit */ 748 error_report("PCI: single function device can't be populated " 749 "in function %x.%x", slot, PCI_FUNC(dev->devfn)); 750 return -1; 751 } 752 return 0; 753 } 754 755 if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { 756 return 0; 757 } 758 /* function 0 indicates single function, so function > 0 must be NULL */ 759 for (func = 1; func < PCI_FUNC_MAX; ++func) { 760 if (bus->devices[PCI_DEVFN(slot, func)]) { 761 error_report("PCI: %x.0 indicates single function, " 762 "but %x.%x is already populated.", 763 slot, slot, func); 764 return -1; 765 } 766 } 767 return 0; 768 } 769 770 static void pci_config_alloc(PCIDevice *pci_dev) 771 { 772 int config_size = pci_config_size(pci_dev); 773 774 pci_dev->config = g_malloc0(config_size); 775 pci_dev->cmask = g_malloc0(config_size); 776 pci_dev->wmask = g_malloc0(config_size); 777 pci_dev->w1cmask = g_malloc0(config_size); 778 pci_dev->used = g_malloc0(config_size); 779 } 780 781 static void pci_config_free(PCIDevice *pci_dev) 782 { 783 g_free(pci_dev->config); 784 g_free(pci_dev->cmask); 785 g_free(pci_dev->wmask); 786 g_free(pci_dev->w1cmask); 787 g_free(pci_dev->used); 788 } 789 790 /* -1 for devfn means auto assign */ 791 static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus, 792 const char *name, int devfn) 793 { 794 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev); 795 PCIConfigReadFunc *config_read = pc->config_read; 796 PCIConfigWriteFunc *config_write = pc->config_write; 797 AddressSpace *dma_as; 798 799 if (devfn < 0) { 800 for(devfn = bus->devfn_min ; devfn < ARRAY_SIZE(bus->devices); 801 devfn += PCI_FUNC_MAX) { 802 if (!bus->devices[devfn]) 803 goto found; 804 } 805 error_report("PCI: no slot/function available for %s, all in use", name); 806 return NULL; 807 found: ; 808 } else if (bus->devices[devfn]) { 809 error_report("PCI: slot %d function %d not available for %s, in use by %s", 810 PCI_SLOT(devfn), PCI_FUNC(devfn), name, bus->devices[devfn]->name); 811 return NULL; 812 } 813 814 pci_dev->bus = bus; 815 dma_as = pci_device_iommu_address_space(pci_dev); 816 817 memory_region_init_alias(&pci_dev->bus_master_enable_region, 818 OBJECT(pci_dev), "bus master", 819 dma_as->root, 0, memory_region_size(dma_as->root)); 820 memory_region_set_enabled(&pci_dev->bus_master_enable_region, false); 821 address_space_init(&pci_dev->bus_master_as, &pci_dev->bus_master_enable_region, 822 name); 823 824 pci_dev->devfn = devfn; 825 pstrcpy(pci_dev->name, sizeof(pci_dev->name), name); 826 pci_dev->irq_state = 0; 827 pci_config_alloc(pci_dev); 828 829 pci_config_set_vendor_id(pci_dev->config, pc->vendor_id); 830 pci_config_set_device_id(pci_dev->config, pc->device_id); 831 pci_config_set_revision(pci_dev->config, pc->revision); 832 pci_config_set_class(pci_dev->config, pc->class_id); 833 834 if (!pc->is_bridge) { 835 if (pc->subsystem_vendor_id || pc->subsystem_id) { 836 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID, 837 pc->subsystem_vendor_id); 838 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID, 839 pc->subsystem_id); 840 } else { 841 pci_set_default_subsystem_id(pci_dev); 842 } 843 } else { 844 /* subsystem_vendor_id/subsystem_id are only for header type 0 */ 845 assert(!pc->subsystem_vendor_id); 846 assert(!pc->subsystem_id); 847 } 848 pci_init_cmask(pci_dev); 849 pci_init_wmask(pci_dev); 850 pci_init_w1cmask(pci_dev); 851 if (pc->is_bridge) { 852 pci_init_mask_bridge(pci_dev); 853 } 854 if (pci_init_multifunction(bus, pci_dev)) { 855 pci_config_free(pci_dev); 856 return NULL; 857 } 858 859 if (!config_read) 860 config_read = pci_default_read_config; 861 if (!config_write) 862 config_write = pci_default_write_config; 863 pci_dev->config_read = config_read; 864 pci_dev->config_write = config_write; 865 bus->devices[devfn] = pci_dev; 866 pci_dev->irq = qemu_allocate_irqs(pci_set_irq, pci_dev, PCI_NUM_PINS); 867 pci_dev->version_id = 2; /* Current pci device vmstate version */ 868 return pci_dev; 869 } 870 871 static void do_pci_unregister_device(PCIDevice *pci_dev) 872 { 873 qemu_free_irqs(pci_dev->irq); 874 pci_dev->bus->devices[pci_dev->devfn] = NULL; 875 pci_config_free(pci_dev); 876 877 address_space_destroy(&pci_dev->bus_master_as); 878 memory_region_destroy(&pci_dev->bus_master_enable_region); 879 } 880 881 static void pci_unregister_io_regions(PCIDevice *pci_dev) 882 { 883 PCIIORegion *r; 884 int i; 885 886 for(i = 0; i < PCI_NUM_REGIONS; i++) { 887 r = &pci_dev->io_regions[i]; 888 if (!r->size || r->addr == PCI_BAR_UNMAPPED) 889 continue; 890 memory_region_del_subregion(r->address_space, r->memory); 891 } 892 893 pci_unregister_vga(pci_dev); 894 } 895 896 static int pci_unregister_device(DeviceState *dev) 897 { 898 PCIDevice *pci_dev = PCI_DEVICE(dev); 899 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev); 900 901 pci_unregister_io_regions(pci_dev); 902 pci_del_option_rom(pci_dev); 903 904 if (pc->exit) { 905 pc->exit(pci_dev); 906 } 907 908 do_pci_unregister_device(pci_dev); 909 return 0; 910 } 911 912 void pci_register_bar(PCIDevice *pci_dev, int region_num, 913 uint8_t type, MemoryRegion *memory) 914 { 915 PCIIORegion *r; 916 uint32_t addr; 917 uint64_t wmask; 918 pcibus_t size = memory_region_size(memory); 919 920 assert(region_num >= 0); 921 assert(region_num < PCI_NUM_REGIONS); 922 if (size & (size-1)) { 923 fprintf(stderr, "ERROR: PCI region size must be pow2 " 924 "type=0x%x, size=0x%"FMT_PCIBUS"\n", type, size); 925 exit(1); 926 } 927 928 r = &pci_dev->io_regions[region_num]; 929 r->addr = PCI_BAR_UNMAPPED; 930 r->size = size; 931 r->type = type; 932 r->memory = NULL; 933 934 wmask = ~(size - 1); 935 addr = pci_bar(pci_dev, region_num); 936 if (region_num == PCI_ROM_SLOT) { 937 /* ROM enable bit is writable */ 938 wmask |= PCI_ROM_ADDRESS_ENABLE; 939 } 940 pci_set_long(pci_dev->config + addr, type); 941 if (!(r->type & PCI_BASE_ADDRESS_SPACE_IO) && 942 r->type & PCI_BASE_ADDRESS_MEM_TYPE_64) { 943 pci_set_quad(pci_dev->wmask + addr, wmask); 944 pci_set_quad(pci_dev->cmask + addr, ~0ULL); 945 } else { 946 pci_set_long(pci_dev->wmask + addr, wmask & 0xffffffff); 947 pci_set_long(pci_dev->cmask + addr, 0xffffffff); 948 } 949 pci_dev->io_regions[region_num].memory = memory; 950 pci_dev->io_regions[region_num].address_space 951 = type & PCI_BASE_ADDRESS_SPACE_IO 952 ? pci_dev->bus->address_space_io 953 : pci_dev->bus->address_space_mem; 954 } 955 956 static void pci_update_vga(PCIDevice *pci_dev) 957 { 958 uint16_t cmd; 959 960 if (!pci_dev->has_vga) { 961 return; 962 } 963 964 cmd = pci_get_word(pci_dev->config + PCI_COMMAND); 965 966 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_MEM], 967 cmd & PCI_COMMAND_MEMORY); 968 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO], 969 cmd & PCI_COMMAND_IO); 970 memory_region_set_enabled(pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI], 971 cmd & PCI_COMMAND_IO); 972 } 973 974 void pci_register_vga(PCIDevice *pci_dev, MemoryRegion *mem, 975 MemoryRegion *io_lo, MemoryRegion *io_hi) 976 { 977 assert(!pci_dev->has_vga); 978 979 assert(memory_region_size(mem) == QEMU_PCI_VGA_MEM_SIZE); 980 pci_dev->vga_regions[QEMU_PCI_VGA_MEM] = mem; 981 memory_region_add_subregion_overlap(pci_dev->bus->address_space_mem, 982 QEMU_PCI_VGA_MEM_BASE, mem, 1); 983 984 assert(memory_region_size(io_lo) == QEMU_PCI_VGA_IO_LO_SIZE); 985 pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO] = io_lo; 986 memory_region_add_subregion_overlap(pci_dev->bus->address_space_io, 987 QEMU_PCI_VGA_IO_LO_BASE, io_lo, 1); 988 989 assert(memory_region_size(io_hi) == QEMU_PCI_VGA_IO_HI_SIZE); 990 pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI] = io_hi; 991 memory_region_add_subregion_overlap(pci_dev->bus->address_space_io, 992 QEMU_PCI_VGA_IO_HI_BASE, io_hi, 1); 993 pci_dev->has_vga = true; 994 995 pci_update_vga(pci_dev); 996 } 997 998 void pci_unregister_vga(PCIDevice *pci_dev) 999 { 1000 if (!pci_dev->has_vga) { 1001 return; 1002 } 1003 1004 memory_region_del_subregion(pci_dev->bus->address_space_mem, 1005 pci_dev->vga_regions[QEMU_PCI_VGA_MEM]); 1006 memory_region_del_subregion(pci_dev->bus->address_space_io, 1007 pci_dev->vga_regions[QEMU_PCI_VGA_IO_LO]); 1008 memory_region_del_subregion(pci_dev->bus->address_space_io, 1009 pci_dev->vga_regions[QEMU_PCI_VGA_IO_HI]); 1010 pci_dev->has_vga = false; 1011 } 1012 1013 pcibus_t pci_get_bar_addr(PCIDevice *pci_dev, int region_num) 1014 { 1015 return pci_dev->io_regions[region_num].addr; 1016 } 1017 1018 static pcibus_t pci_bar_address(PCIDevice *d, 1019 int reg, uint8_t type, pcibus_t size) 1020 { 1021 pcibus_t new_addr, last_addr; 1022 int bar = pci_bar(d, reg); 1023 uint16_t cmd = pci_get_word(d->config + PCI_COMMAND); 1024 1025 if (type & PCI_BASE_ADDRESS_SPACE_IO) { 1026 if (!(cmd & PCI_COMMAND_IO)) { 1027 return PCI_BAR_UNMAPPED; 1028 } 1029 new_addr = pci_get_long(d->config + bar) & ~(size - 1); 1030 last_addr = new_addr + size - 1; 1031 /* NOTE: we have only 64K ioports on PC */ 1032 if (last_addr <= new_addr || new_addr == 0 || last_addr > UINT16_MAX) { 1033 return PCI_BAR_UNMAPPED; 1034 } 1035 return new_addr; 1036 } 1037 1038 if (!(cmd & PCI_COMMAND_MEMORY)) { 1039 return PCI_BAR_UNMAPPED; 1040 } 1041 if (type & PCI_BASE_ADDRESS_MEM_TYPE_64) { 1042 new_addr = pci_get_quad(d->config + bar); 1043 } else { 1044 new_addr = pci_get_long(d->config + bar); 1045 } 1046 /* the ROM slot has a specific enable bit */ 1047 if (reg == PCI_ROM_SLOT && !(new_addr & PCI_ROM_ADDRESS_ENABLE)) { 1048 return PCI_BAR_UNMAPPED; 1049 } 1050 new_addr &= ~(size - 1); 1051 last_addr = new_addr + size - 1; 1052 /* NOTE: we do not support wrapping */ 1053 /* XXX: as we cannot support really dynamic 1054 mappings, we handle specific values as invalid 1055 mappings. */ 1056 if (last_addr <= new_addr || new_addr == 0 || 1057 last_addr == PCI_BAR_UNMAPPED) { 1058 return PCI_BAR_UNMAPPED; 1059 } 1060 1061 /* Now pcibus_t is 64bit. 1062 * Check if 32 bit BAR wraps around explicitly. 1063 * Without this, PC ide doesn't work well. 1064 * TODO: remove this work around. 1065 */ 1066 if (!(type & PCI_BASE_ADDRESS_MEM_TYPE_64) && last_addr >= UINT32_MAX) { 1067 return PCI_BAR_UNMAPPED; 1068 } 1069 1070 /* 1071 * OS is allowed to set BAR beyond its addressable 1072 * bits. For example, 32 bit OS can set 64bit bar 1073 * to >4G. Check it. TODO: we might need to support 1074 * it in the future for e.g. PAE. 1075 */ 1076 if (last_addr >= HWADDR_MAX) { 1077 return PCI_BAR_UNMAPPED; 1078 } 1079 1080 return new_addr; 1081 } 1082 1083 static void pci_update_mappings(PCIDevice *d) 1084 { 1085 PCIIORegion *r; 1086 int i; 1087 pcibus_t new_addr; 1088 1089 for(i = 0; i < PCI_NUM_REGIONS; i++) { 1090 r = &d->io_regions[i]; 1091 1092 /* this region isn't registered */ 1093 if (!r->size) 1094 continue; 1095 1096 new_addr = pci_bar_address(d, i, r->type, r->size); 1097 1098 /* This bar isn't changed */ 1099 if (new_addr == r->addr) 1100 continue; 1101 1102 /* now do the real mapping */ 1103 if (r->addr != PCI_BAR_UNMAPPED) { 1104 memory_region_del_subregion(r->address_space, r->memory); 1105 } 1106 r->addr = new_addr; 1107 if (r->addr != PCI_BAR_UNMAPPED) { 1108 memory_region_add_subregion_overlap(r->address_space, 1109 r->addr, r->memory, 1); 1110 } 1111 } 1112 1113 pci_update_vga(d); 1114 } 1115 1116 static inline int pci_irq_disabled(PCIDevice *d) 1117 { 1118 return pci_get_word(d->config + PCI_COMMAND) & PCI_COMMAND_INTX_DISABLE; 1119 } 1120 1121 /* Called after interrupt disabled field update in config space, 1122 * assert/deassert interrupts if necessary. 1123 * Gets original interrupt disable bit value (before update). */ 1124 static void pci_update_irq_disabled(PCIDevice *d, int was_irq_disabled) 1125 { 1126 int i, disabled = pci_irq_disabled(d); 1127 if (disabled == was_irq_disabled) 1128 return; 1129 for (i = 0; i < PCI_NUM_PINS; ++i) { 1130 int state = pci_irq_state(d, i); 1131 pci_change_irq_level(d, i, disabled ? -state : state); 1132 } 1133 } 1134 1135 uint32_t pci_default_read_config(PCIDevice *d, 1136 uint32_t address, int len) 1137 { 1138 uint32_t val = 0; 1139 1140 memcpy(&val, d->config + address, len); 1141 return le32_to_cpu(val); 1142 } 1143 1144 void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l) 1145 { 1146 int i, was_irq_disabled = pci_irq_disabled(d); 1147 1148 for (i = 0; i < l; val >>= 8, ++i) { 1149 uint8_t wmask = d->wmask[addr + i]; 1150 uint8_t w1cmask = d->w1cmask[addr + i]; 1151 assert(!(wmask & w1cmask)); 1152 d->config[addr + i] = (d->config[addr + i] & ~wmask) | (val & wmask); 1153 d->config[addr + i] &= ~(val & w1cmask); /* W1C: Write 1 to Clear */ 1154 } 1155 if (ranges_overlap(addr, l, PCI_BASE_ADDRESS_0, 24) || 1156 ranges_overlap(addr, l, PCI_ROM_ADDRESS, 4) || 1157 ranges_overlap(addr, l, PCI_ROM_ADDRESS1, 4) || 1158 range_covers_byte(addr, l, PCI_COMMAND)) 1159 pci_update_mappings(d); 1160 1161 if (range_covers_byte(addr, l, PCI_COMMAND)) { 1162 pci_update_irq_disabled(d, was_irq_disabled); 1163 memory_region_set_enabled(&d->bus_master_enable_region, 1164 pci_get_word(d->config + PCI_COMMAND) 1165 & PCI_COMMAND_MASTER); 1166 } 1167 1168 msi_write_config(d, addr, val, l); 1169 msix_write_config(d, addr, val, l); 1170 } 1171 1172 /***********************************************************/ 1173 /* generic PCI irq support */ 1174 1175 /* 0 <= irq_num <= 3. level must be 0 or 1 */ 1176 static void pci_set_irq(void *opaque, int irq_num, int level) 1177 { 1178 PCIDevice *pci_dev = opaque; 1179 int change; 1180 1181 change = level - pci_irq_state(pci_dev, irq_num); 1182 if (!change) 1183 return; 1184 1185 pci_set_irq_state(pci_dev, irq_num, level); 1186 pci_update_irq_status(pci_dev); 1187 if (pci_irq_disabled(pci_dev)) 1188 return; 1189 pci_change_irq_level(pci_dev, irq_num, change); 1190 } 1191 1192 /* Special hooks used by device assignment */ 1193 void pci_bus_set_route_irq_fn(PCIBus *bus, pci_route_irq_fn route_intx_to_irq) 1194 { 1195 assert(pci_bus_is_root(bus)); 1196 bus->route_intx_to_irq = route_intx_to_irq; 1197 } 1198 1199 PCIINTxRoute pci_device_route_intx_to_irq(PCIDevice *dev, int pin) 1200 { 1201 PCIBus *bus; 1202 1203 do { 1204 bus = dev->bus; 1205 pin = bus->map_irq(dev, pin); 1206 dev = bus->parent_dev; 1207 } while (dev); 1208 1209 if (!bus->route_intx_to_irq) { 1210 error_report("PCI: Bug - unimplemented PCI INTx routing (%s)", 1211 object_get_typename(OBJECT(bus->qbus.parent))); 1212 return (PCIINTxRoute) { PCI_INTX_DISABLED, -1 }; 1213 } 1214 1215 return bus->route_intx_to_irq(bus->irq_opaque, pin); 1216 } 1217 1218 bool pci_intx_route_changed(PCIINTxRoute *old, PCIINTxRoute *new) 1219 { 1220 return old->mode != new->mode || old->irq != new->irq; 1221 } 1222 1223 void pci_bus_fire_intx_routing_notifier(PCIBus *bus) 1224 { 1225 PCIDevice *dev; 1226 PCIBus *sec; 1227 int i; 1228 1229 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { 1230 dev = bus->devices[i]; 1231 if (dev && dev->intx_routing_notifier) { 1232 dev->intx_routing_notifier(dev); 1233 } 1234 } 1235 1236 QLIST_FOREACH(sec, &bus->child, sibling) { 1237 pci_bus_fire_intx_routing_notifier(sec); 1238 } 1239 } 1240 1241 void pci_device_set_intx_routing_notifier(PCIDevice *dev, 1242 PCIINTxRoutingNotifier notifier) 1243 { 1244 dev->intx_routing_notifier = notifier; 1245 } 1246 1247 /* 1248 * PCI-to-PCI bridge specification 1249 * 9.1: Interrupt routing. Table 9-1 1250 * 1251 * the PCI Express Base Specification, Revision 2.1 1252 * 2.2.8.1: INTx interrutp signaling - Rules 1253 * the Implementation Note 1254 * Table 2-20 1255 */ 1256 /* 1257 * 0 <= pin <= 3 0 = INTA, 1 = INTB, 2 = INTC, 3 = INTD 1258 * 0-origin unlike PCI interrupt pin register. 1259 */ 1260 int pci_swizzle_map_irq_fn(PCIDevice *pci_dev, int pin) 1261 { 1262 return (pin + PCI_SLOT(pci_dev->devfn)) % PCI_NUM_PINS; 1263 } 1264 1265 /***********************************************************/ 1266 /* monitor info on PCI */ 1267 1268 typedef struct { 1269 uint16_t class; 1270 const char *desc; 1271 const char *fw_name; 1272 uint16_t fw_ign_bits; 1273 } pci_class_desc; 1274 1275 static const pci_class_desc pci_class_descriptions[] = 1276 { 1277 { 0x0001, "VGA controller", "display"}, 1278 { 0x0100, "SCSI controller", "scsi"}, 1279 { 0x0101, "IDE controller", "ide"}, 1280 { 0x0102, "Floppy controller", "fdc"}, 1281 { 0x0103, "IPI controller", "ipi"}, 1282 { 0x0104, "RAID controller", "raid"}, 1283 { 0x0106, "SATA controller"}, 1284 { 0x0107, "SAS controller"}, 1285 { 0x0180, "Storage controller"}, 1286 { 0x0200, "Ethernet controller", "ethernet"}, 1287 { 0x0201, "Token Ring controller", "token-ring"}, 1288 { 0x0202, "FDDI controller", "fddi"}, 1289 { 0x0203, "ATM controller", "atm"}, 1290 { 0x0280, "Network controller"}, 1291 { 0x0300, "VGA controller", "display", 0x00ff}, 1292 { 0x0301, "XGA controller"}, 1293 { 0x0302, "3D controller"}, 1294 { 0x0380, "Display controller"}, 1295 { 0x0400, "Video controller", "video"}, 1296 { 0x0401, "Audio controller", "sound"}, 1297 { 0x0402, "Phone"}, 1298 { 0x0403, "Audio controller", "sound"}, 1299 { 0x0480, "Multimedia controller"}, 1300 { 0x0500, "RAM controller", "memory"}, 1301 { 0x0501, "Flash controller", "flash"}, 1302 { 0x0580, "Memory controller"}, 1303 { 0x0600, "Host bridge", "host"}, 1304 { 0x0601, "ISA bridge", "isa"}, 1305 { 0x0602, "EISA bridge", "eisa"}, 1306 { 0x0603, "MC bridge", "mca"}, 1307 { 0x0604, "PCI bridge", "pci"}, 1308 { 0x0605, "PCMCIA bridge", "pcmcia"}, 1309 { 0x0606, "NUBUS bridge", "nubus"}, 1310 { 0x0607, "CARDBUS bridge", "cardbus"}, 1311 { 0x0608, "RACEWAY bridge"}, 1312 { 0x0680, "Bridge"}, 1313 { 0x0700, "Serial port", "serial"}, 1314 { 0x0701, "Parallel port", "parallel"}, 1315 { 0x0800, "Interrupt controller", "interrupt-controller"}, 1316 { 0x0801, "DMA controller", "dma-controller"}, 1317 { 0x0802, "Timer", "timer"}, 1318 { 0x0803, "RTC", "rtc"}, 1319 { 0x0900, "Keyboard", "keyboard"}, 1320 { 0x0901, "Pen", "pen"}, 1321 { 0x0902, "Mouse", "mouse"}, 1322 { 0x0A00, "Dock station", "dock", 0x00ff}, 1323 { 0x0B00, "i386 cpu", "cpu", 0x00ff}, 1324 { 0x0c00, "Fireware contorller", "fireware"}, 1325 { 0x0c01, "Access bus controller", "access-bus"}, 1326 { 0x0c02, "SSA controller", "ssa"}, 1327 { 0x0c03, "USB controller", "usb"}, 1328 { 0x0c04, "Fibre channel controller", "fibre-channel"}, 1329 { 0x0c05, "SMBus"}, 1330 { 0, NULL} 1331 }; 1332 1333 static void pci_for_each_device_under_bus(PCIBus *bus, 1334 void (*fn)(PCIBus *b, PCIDevice *d, 1335 void *opaque), 1336 void *opaque) 1337 { 1338 PCIDevice *d; 1339 int devfn; 1340 1341 for(devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { 1342 d = bus->devices[devfn]; 1343 if (d) { 1344 fn(bus, d, opaque); 1345 } 1346 } 1347 } 1348 1349 void pci_for_each_device(PCIBus *bus, int bus_num, 1350 void (*fn)(PCIBus *b, PCIDevice *d, void *opaque), 1351 void *opaque) 1352 { 1353 bus = pci_find_bus_nr(bus, bus_num); 1354 1355 if (bus) { 1356 pci_for_each_device_under_bus(bus, fn, opaque); 1357 } 1358 } 1359 1360 static const pci_class_desc *get_class_desc(int class) 1361 { 1362 const pci_class_desc *desc; 1363 1364 desc = pci_class_descriptions; 1365 while (desc->desc && class != desc->class) { 1366 desc++; 1367 } 1368 1369 return desc; 1370 } 1371 1372 static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num); 1373 1374 static PciMemoryRegionList *qmp_query_pci_regions(const PCIDevice *dev) 1375 { 1376 PciMemoryRegionList *head = NULL, *cur_item = NULL; 1377 int i; 1378 1379 for (i = 0; i < PCI_NUM_REGIONS; i++) { 1380 const PCIIORegion *r = &dev->io_regions[i]; 1381 PciMemoryRegionList *region; 1382 1383 if (!r->size) { 1384 continue; 1385 } 1386 1387 region = g_malloc0(sizeof(*region)); 1388 region->value = g_malloc0(sizeof(*region->value)); 1389 1390 if (r->type & PCI_BASE_ADDRESS_SPACE_IO) { 1391 region->value->type = g_strdup("io"); 1392 } else { 1393 region->value->type = g_strdup("memory"); 1394 region->value->has_prefetch = true; 1395 region->value->prefetch = !!(r->type & PCI_BASE_ADDRESS_MEM_PREFETCH); 1396 region->value->has_mem_type_64 = true; 1397 region->value->mem_type_64 = !!(r->type & PCI_BASE_ADDRESS_MEM_TYPE_64); 1398 } 1399 1400 region->value->bar = i; 1401 region->value->address = r->addr; 1402 region->value->size = r->size; 1403 1404 /* XXX: waiting for the qapi to support GSList */ 1405 if (!cur_item) { 1406 head = cur_item = region; 1407 } else { 1408 cur_item->next = region; 1409 cur_item = region; 1410 } 1411 } 1412 1413 return head; 1414 } 1415 1416 static PciBridgeInfo *qmp_query_pci_bridge(PCIDevice *dev, PCIBus *bus, 1417 int bus_num) 1418 { 1419 PciBridgeInfo *info; 1420 1421 info = g_malloc0(sizeof(*info)); 1422 1423 info->bus.number = dev->config[PCI_PRIMARY_BUS]; 1424 info->bus.secondary = dev->config[PCI_SECONDARY_BUS]; 1425 info->bus.subordinate = dev->config[PCI_SUBORDINATE_BUS]; 1426 1427 info->bus.io_range = g_malloc0(sizeof(*info->bus.io_range)); 1428 info->bus.io_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_IO); 1429 info->bus.io_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_IO); 1430 1431 info->bus.memory_range = g_malloc0(sizeof(*info->bus.memory_range)); 1432 info->bus.memory_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_MEMORY); 1433 info->bus.memory_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_MEMORY); 1434 1435 info->bus.prefetchable_range = g_malloc0(sizeof(*info->bus.prefetchable_range)); 1436 info->bus.prefetchable_range->base = pci_bridge_get_base(dev, PCI_BASE_ADDRESS_MEM_PREFETCH); 1437 info->bus.prefetchable_range->limit = pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_MEM_PREFETCH); 1438 1439 if (dev->config[PCI_SECONDARY_BUS] != 0) { 1440 PCIBus *child_bus = pci_find_bus_nr(bus, dev->config[PCI_SECONDARY_BUS]); 1441 if (child_bus) { 1442 info->has_devices = true; 1443 info->devices = qmp_query_pci_devices(child_bus, dev->config[PCI_SECONDARY_BUS]); 1444 } 1445 } 1446 1447 return info; 1448 } 1449 1450 static PciDeviceInfo *qmp_query_pci_device(PCIDevice *dev, PCIBus *bus, 1451 int bus_num) 1452 { 1453 const pci_class_desc *desc; 1454 PciDeviceInfo *info; 1455 uint8_t type; 1456 int class; 1457 1458 info = g_malloc0(sizeof(*info)); 1459 info->bus = bus_num; 1460 info->slot = PCI_SLOT(dev->devfn); 1461 info->function = PCI_FUNC(dev->devfn); 1462 1463 class = pci_get_word(dev->config + PCI_CLASS_DEVICE); 1464 info->class_info.q_class = class; 1465 desc = get_class_desc(class); 1466 if (desc->desc) { 1467 info->class_info.has_desc = true; 1468 info->class_info.desc = g_strdup(desc->desc); 1469 } 1470 1471 info->id.vendor = pci_get_word(dev->config + PCI_VENDOR_ID); 1472 info->id.device = pci_get_word(dev->config + PCI_DEVICE_ID); 1473 info->regions = qmp_query_pci_regions(dev); 1474 info->qdev_id = g_strdup(dev->qdev.id ? dev->qdev.id : ""); 1475 1476 if (dev->config[PCI_INTERRUPT_PIN] != 0) { 1477 info->has_irq = true; 1478 info->irq = dev->config[PCI_INTERRUPT_LINE]; 1479 } 1480 1481 type = dev->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION; 1482 if (type == PCI_HEADER_TYPE_BRIDGE) { 1483 info->has_pci_bridge = true; 1484 info->pci_bridge = qmp_query_pci_bridge(dev, bus, bus_num); 1485 } 1486 1487 return info; 1488 } 1489 1490 static PciDeviceInfoList *qmp_query_pci_devices(PCIBus *bus, int bus_num) 1491 { 1492 PciDeviceInfoList *info, *head = NULL, *cur_item = NULL; 1493 PCIDevice *dev; 1494 int devfn; 1495 1496 for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { 1497 dev = bus->devices[devfn]; 1498 if (dev) { 1499 info = g_malloc0(sizeof(*info)); 1500 info->value = qmp_query_pci_device(dev, bus, bus_num); 1501 1502 /* XXX: waiting for the qapi to support GSList */ 1503 if (!cur_item) { 1504 head = cur_item = info; 1505 } else { 1506 cur_item->next = info; 1507 cur_item = info; 1508 } 1509 } 1510 } 1511 1512 return head; 1513 } 1514 1515 static PciInfo *qmp_query_pci_bus(PCIBus *bus, int bus_num) 1516 { 1517 PciInfo *info = NULL; 1518 1519 bus = pci_find_bus_nr(bus, bus_num); 1520 if (bus) { 1521 info = g_malloc0(sizeof(*info)); 1522 info->bus = bus_num; 1523 info->devices = qmp_query_pci_devices(bus, bus_num); 1524 } 1525 1526 return info; 1527 } 1528 1529 PciInfoList *qmp_query_pci(Error **errp) 1530 { 1531 PciInfoList *info, *head = NULL, *cur_item = NULL; 1532 PCIHostState *host_bridge; 1533 1534 QLIST_FOREACH(host_bridge, &pci_host_bridges, next) { 1535 info = g_malloc0(sizeof(*info)); 1536 info->value = qmp_query_pci_bus(host_bridge->bus, 0); 1537 1538 /* XXX: waiting for the qapi to support GSList */ 1539 if (!cur_item) { 1540 head = cur_item = info; 1541 } else { 1542 cur_item->next = info; 1543 cur_item = info; 1544 } 1545 } 1546 1547 return head; 1548 } 1549 1550 static const char * const pci_nic_models[] = { 1551 "ne2k_pci", 1552 "i82551", 1553 "i82557b", 1554 "i82559er", 1555 "rtl8139", 1556 "e1000", 1557 "pcnet", 1558 "virtio", 1559 NULL 1560 }; 1561 1562 static const char * const pci_nic_names[] = { 1563 "ne2k_pci", 1564 "i82551", 1565 "i82557b", 1566 "i82559er", 1567 "rtl8139", 1568 "e1000", 1569 "pcnet", 1570 "virtio-net-pci", 1571 NULL 1572 }; 1573 1574 /* Initialize a PCI NIC. */ 1575 /* FIXME callers should check for failure, but don't */ 1576 PCIDevice *pci_nic_init(NICInfo *nd, PCIBus *rootbus, 1577 const char *default_model, 1578 const char *default_devaddr) 1579 { 1580 const char *devaddr = nd->devaddr ? nd->devaddr : default_devaddr; 1581 PCIBus *bus; 1582 int devfn; 1583 PCIDevice *pci_dev; 1584 DeviceState *dev; 1585 int i; 1586 1587 i = qemu_find_nic_model(nd, pci_nic_models, default_model); 1588 if (i < 0) 1589 return NULL; 1590 1591 bus = pci_get_bus_devfn(&devfn, rootbus, devaddr); 1592 if (!bus) { 1593 error_report("Invalid PCI device address %s for device %s", 1594 devaddr, pci_nic_names[i]); 1595 return NULL; 1596 } 1597 1598 pci_dev = pci_create(bus, devfn, pci_nic_names[i]); 1599 dev = &pci_dev->qdev; 1600 qdev_set_nic_properties(dev, nd); 1601 if (qdev_init(dev) < 0) 1602 return NULL; 1603 return pci_dev; 1604 } 1605 1606 PCIDevice *pci_nic_init_nofail(NICInfo *nd, PCIBus *rootbus, 1607 const char *default_model, 1608 const char *default_devaddr) 1609 { 1610 PCIDevice *res; 1611 1612 if (qemu_show_nic_models(nd->model, pci_nic_models)) 1613 exit(0); 1614 1615 res = pci_nic_init(nd, rootbus, default_model, default_devaddr); 1616 if (!res) 1617 exit(1); 1618 return res; 1619 } 1620 1621 PCIDevice *pci_vga_init(PCIBus *bus) 1622 { 1623 switch (vga_interface_type) { 1624 case VGA_CIRRUS: 1625 return pci_create_simple(bus, -1, "cirrus-vga"); 1626 case VGA_QXL: 1627 return pci_create_simple(bus, -1, "qxl-vga"); 1628 case VGA_STD: 1629 return pci_create_simple(bus, -1, "VGA"); 1630 case VGA_VMWARE: 1631 return pci_create_simple(bus, -1, "vmware-svga"); 1632 case VGA_NONE: 1633 default: /* Other non-PCI types. Checking for unsupported types is already 1634 done in vl.c. */ 1635 return NULL; 1636 } 1637 } 1638 1639 /* Whether a given bus number is in range of the secondary 1640 * bus of the given bridge device. */ 1641 static bool pci_secondary_bus_in_range(PCIDevice *dev, int bus_num) 1642 { 1643 return !(pci_get_word(dev->config + PCI_BRIDGE_CONTROL) & 1644 PCI_BRIDGE_CTL_BUS_RESET) /* Don't walk the bus if it's reset. */ && 1645 dev->config[PCI_SECONDARY_BUS] < bus_num && 1646 bus_num <= dev->config[PCI_SUBORDINATE_BUS]; 1647 } 1648 1649 static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num) 1650 { 1651 PCIBus *sec; 1652 1653 if (!bus) { 1654 return NULL; 1655 } 1656 1657 if (pci_bus_num(bus) == bus_num) { 1658 return bus; 1659 } 1660 1661 /* Consider all bus numbers in range for the host pci bridge. */ 1662 if (!pci_bus_is_root(bus) && 1663 !pci_secondary_bus_in_range(bus->parent_dev, bus_num)) { 1664 return NULL; 1665 } 1666 1667 /* try child bus */ 1668 for (; bus; bus = sec) { 1669 QLIST_FOREACH(sec, &bus->child, sibling) { 1670 assert(!pci_bus_is_root(sec)); 1671 if (sec->parent_dev->config[PCI_SECONDARY_BUS] == bus_num) { 1672 return sec; 1673 } 1674 if (pci_secondary_bus_in_range(sec->parent_dev, bus_num)) { 1675 break; 1676 } 1677 } 1678 } 1679 1680 return NULL; 1681 } 1682 1683 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn) 1684 { 1685 bus = pci_find_bus_nr(bus, bus_num); 1686 1687 if (!bus) 1688 return NULL; 1689 1690 return bus->devices[devfn]; 1691 } 1692 1693 static int pci_qdev_init(DeviceState *qdev) 1694 { 1695 PCIDevice *pci_dev = (PCIDevice *)qdev; 1696 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(pci_dev); 1697 PCIBus *bus; 1698 int rc; 1699 bool is_default_rom; 1700 1701 /* initialize cap_present for pci_is_express() and pci_config_size() */ 1702 if (pc->is_express) { 1703 pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS; 1704 } 1705 1706 bus = PCI_BUS(qdev_get_parent_bus(qdev)); 1707 pci_dev = do_pci_register_device(pci_dev, bus, 1708 object_get_typename(OBJECT(qdev)), 1709 pci_dev->devfn); 1710 if (pci_dev == NULL) 1711 return -1; 1712 if (qdev->hotplugged && pc->no_hotplug) { 1713 qerror_report(QERR_DEVICE_NO_HOTPLUG, object_get_typename(OBJECT(pci_dev))); 1714 do_pci_unregister_device(pci_dev); 1715 return -1; 1716 } 1717 if (pc->init) { 1718 rc = pc->init(pci_dev); 1719 if (rc != 0) { 1720 do_pci_unregister_device(pci_dev); 1721 return rc; 1722 } 1723 } 1724 1725 /* rom loading */ 1726 is_default_rom = false; 1727 if (pci_dev->romfile == NULL && pc->romfile != NULL) { 1728 pci_dev->romfile = g_strdup(pc->romfile); 1729 is_default_rom = true; 1730 } 1731 pci_add_option_rom(pci_dev, is_default_rom); 1732 1733 if (bus->hotplug) { 1734 /* Let buses differentiate between hotplug and when device is 1735 * enabled during qemu machine creation. */ 1736 rc = bus->hotplug(bus->hotplug_qdev, pci_dev, 1737 qdev->hotplugged ? PCI_HOTPLUG_ENABLED: 1738 PCI_COLDPLUG_ENABLED); 1739 if (rc != 0) { 1740 int r = pci_unregister_device(&pci_dev->qdev); 1741 assert(!r); 1742 return rc; 1743 } 1744 } 1745 return 0; 1746 } 1747 1748 static int pci_unplug_device(DeviceState *qdev) 1749 { 1750 PCIDevice *dev = PCI_DEVICE(qdev); 1751 PCIDeviceClass *pc = PCI_DEVICE_GET_CLASS(dev); 1752 1753 if (pc->no_hotplug) { 1754 qerror_report(QERR_DEVICE_NO_HOTPLUG, object_get_typename(OBJECT(dev))); 1755 return -1; 1756 } 1757 return dev->bus->hotplug(dev->bus->hotplug_qdev, dev, 1758 PCI_HOTPLUG_DISABLED); 1759 } 1760 1761 PCIDevice *pci_create_multifunction(PCIBus *bus, int devfn, bool multifunction, 1762 const char *name) 1763 { 1764 DeviceState *dev; 1765 1766 dev = qdev_create(&bus->qbus, name); 1767 qdev_prop_set_int32(dev, "addr", devfn); 1768 qdev_prop_set_bit(dev, "multifunction", multifunction); 1769 return PCI_DEVICE(dev); 1770 } 1771 1772 PCIDevice *pci_create_simple_multifunction(PCIBus *bus, int devfn, 1773 bool multifunction, 1774 const char *name) 1775 { 1776 PCIDevice *dev = pci_create_multifunction(bus, devfn, multifunction, name); 1777 qdev_init_nofail(&dev->qdev); 1778 return dev; 1779 } 1780 1781 PCIDevice *pci_create(PCIBus *bus, int devfn, const char *name) 1782 { 1783 return pci_create_multifunction(bus, devfn, false, name); 1784 } 1785 1786 PCIDevice *pci_create_simple(PCIBus *bus, int devfn, const char *name) 1787 { 1788 return pci_create_simple_multifunction(bus, devfn, false, name); 1789 } 1790 1791 static uint8_t pci_find_space(PCIDevice *pdev, uint8_t size) 1792 { 1793 int offset = PCI_CONFIG_HEADER_SIZE; 1794 int i; 1795 for (i = PCI_CONFIG_HEADER_SIZE; i < PCI_CONFIG_SPACE_SIZE; ++i) { 1796 if (pdev->used[i]) 1797 offset = i + 1; 1798 else if (i - offset + 1 == size) 1799 return offset; 1800 } 1801 return 0; 1802 } 1803 1804 static uint8_t pci_find_capability_list(PCIDevice *pdev, uint8_t cap_id, 1805 uint8_t *prev_p) 1806 { 1807 uint8_t next, prev; 1808 1809 if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST)) 1810 return 0; 1811 1812 for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]); 1813 prev = next + PCI_CAP_LIST_NEXT) 1814 if (pdev->config[next + PCI_CAP_LIST_ID] == cap_id) 1815 break; 1816 1817 if (prev_p) 1818 *prev_p = prev; 1819 return next; 1820 } 1821 1822 static uint8_t pci_find_capability_at_offset(PCIDevice *pdev, uint8_t offset) 1823 { 1824 uint8_t next, prev, found = 0; 1825 1826 if (!(pdev->used[offset])) { 1827 return 0; 1828 } 1829 1830 assert(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST); 1831 1832 for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]); 1833 prev = next + PCI_CAP_LIST_NEXT) { 1834 if (next <= offset && next > found) { 1835 found = next; 1836 } 1837 } 1838 return found; 1839 } 1840 1841 /* Patch the PCI vendor and device ids in a PCI rom image if necessary. 1842 This is needed for an option rom which is used for more than one device. */ 1843 static void pci_patch_ids(PCIDevice *pdev, uint8_t *ptr, int size) 1844 { 1845 uint16_t vendor_id; 1846 uint16_t device_id; 1847 uint16_t rom_vendor_id; 1848 uint16_t rom_device_id; 1849 uint16_t rom_magic; 1850 uint16_t pcir_offset; 1851 uint8_t checksum; 1852 1853 /* Words in rom data are little endian (like in PCI configuration), 1854 so they can be read / written with pci_get_word / pci_set_word. */ 1855 1856 /* Only a valid rom will be patched. */ 1857 rom_magic = pci_get_word(ptr); 1858 if (rom_magic != 0xaa55) { 1859 PCI_DPRINTF("Bad ROM magic %04x\n", rom_magic); 1860 return; 1861 } 1862 pcir_offset = pci_get_word(ptr + 0x18); 1863 if (pcir_offset + 8 >= size || memcmp(ptr + pcir_offset, "PCIR", 4)) { 1864 PCI_DPRINTF("Bad PCIR offset 0x%x or signature\n", pcir_offset); 1865 return; 1866 } 1867 1868 vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID); 1869 device_id = pci_get_word(pdev->config + PCI_DEVICE_ID); 1870 rom_vendor_id = pci_get_word(ptr + pcir_offset + 4); 1871 rom_device_id = pci_get_word(ptr + pcir_offset + 6); 1872 1873 PCI_DPRINTF("%s: ROM id %04x%04x / PCI id %04x%04x\n", pdev->romfile, 1874 vendor_id, device_id, rom_vendor_id, rom_device_id); 1875 1876 checksum = ptr[6]; 1877 1878 if (vendor_id != rom_vendor_id) { 1879 /* Patch vendor id and checksum (at offset 6 for etherboot roms). */ 1880 checksum += (uint8_t)rom_vendor_id + (uint8_t)(rom_vendor_id >> 8); 1881 checksum -= (uint8_t)vendor_id + (uint8_t)(vendor_id >> 8); 1882 PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum); 1883 ptr[6] = checksum; 1884 pci_set_word(ptr + pcir_offset + 4, vendor_id); 1885 } 1886 1887 if (device_id != rom_device_id) { 1888 /* Patch device id and checksum (at offset 6 for etherboot roms). */ 1889 checksum += (uint8_t)rom_device_id + (uint8_t)(rom_device_id >> 8); 1890 checksum -= (uint8_t)device_id + (uint8_t)(device_id >> 8); 1891 PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum); 1892 ptr[6] = checksum; 1893 pci_set_word(ptr + pcir_offset + 6, device_id); 1894 } 1895 } 1896 1897 /* Add an option rom for the device */ 1898 static int pci_add_option_rom(PCIDevice *pdev, bool is_default_rom) 1899 { 1900 int size; 1901 char *path; 1902 void *ptr; 1903 char name[32]; 1904 const VMStateDescription *vmsd; 1905 1906 if (!pdev->romfile) 1907 return 0; 1908 if (strlen(pdev->romfile) == 0) 1909 return 0; 1910 1911 if (!pdev->rom_bar) { 1912 /* 1913 * Load rom via fw_cfg instead of creating a rom bar, 1914 * for 0.11 compatibility. 1915 */ 1916 int class = pci_get_word(pdev->config + PCI_CLASS_DEVICE); 1917 if (class == 0x0300) { 1918 rom_add_vga(pdev->romfile); 1919 } else { 1920 rom_add_option(pdev->romfile, -1); 1921 } 1922 return 0; 1923 } 1924 1925 path = qemu_find_file(QEMU_FILE_TYPE_BIOS, pdev->romfile); 1926 if (path == NULL) { 1927 path = g_strdup(pdev->romfile); 1928 } 1929 1930 size = get_image_size(path); 1931 if (size < 0) { 1932 error_report("%s: failed to find romfile \"%s\"", 1933 __func__, pdev->romfile); 1934 g_free(path); 1935 return -1; 1936 } else if (size == 0) { 1937 error_report("%s: ignoring empty romfile \"%s\"", 1938 __func__, pdev->romfile); 1939 g_free(path); 1940 return -1; 1941 } 1942 if (size & (size - 1)) { 1943 size = 1 << qemu_fls(size); 1944 } 1945 1946 vmsd = qdev_get_vmsd(DEVICE(pdev)); 1947 1948 if (vmsd) { 1949 snprintf(name, sizeof(name), "%s.rom", vmsd->name); 1950 } else { 1951 snprintf(name, sizeof(name), "%s.rom", object_get_typename(OBJECT(pdev))); 1952 } 1953 pdev->has_rom = true; 1954 memory_region_init_ram(&pdev->rom, OBJECT(pdev), name, size); 1955 vmstate_register_ram(&pdev->rom, &pdev->qdev); 1956 ptr = memory_region_get_ram_ptr(&pdev->rom); 1957 load_image(path, ptr); 1958 g_free(path); 1959 1960 if (is_default_rom) { 1961 /* Only the default rom images will be patched (if needed). */ 1962 pci_patch_ids(pdev, ptr, size); 1963 } 1964 1965 pci_register_bar(pdev, PCI_ROM_SLOT, 0, &pdev->rom); 1966 1967 return 0; 1968 } 1969 1970 static void pci_del_option_rom(PCIDevice *pdev) 1971 { 1972 if (!pdev->has_rom) 1973 return; 1974 1975 vmstate_unregister_ram(&pdev->rom, &pdev->qdev); 1976 memory_region_destroy(&pdev->rom); 1977 pdev->has_rom = false; 1978 } 1979 1980 /* 1981 * if !offset 1982 * Reserve space and add capability to the linked list in pci config space 1983 * 1984 * if offset = 0, 1985 * Find and reserve space and add capability to the linked list 1986 * in pci config space */ 1987 int pci_add_capability(PCIDevice *pdev, uint8_t cap_id, 1988 uint8_t offset, uint8_t size) 1989 { 1990 uint8_t *config; 1991 int i, overlapping_cap; 1992 1993 if (!offset) { 1994 offset = pci_find_space(pdev, size); 1995 if (!offset) { 1996 return -ENOSPC; 1997 } 1998 } else { 1999 /* Verify that capabilities don't overlap. Note: device assignment 2000 * depends on this check to verify that the device is not broken. 2001 * Should never trigger for emulated devices, but it's helpful 2002 * for debugging these. */ 2003 for (i = offset; i < offset + size; i++) { 2004 overlapping_cap = pci_find_capability_at_offset(pdev, i); 2005 if (overlapping_cap) { 2006 fprintf(stderr, "ERROR: %s:%02x:%02x.%x " 2007 "Attempt to add PCI capability %x at offset " 2008 "%x overlaps existing capability %x at offset %x\n", 2009 pci_root_bus_path(pdev), pci_bus_num(pdev->bus), 2010 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), 2011 cap_id, offset, overlapping_cap, i); 2012 return -EINVAL; 2013 } 2014 } 2015 } 2016 2017 config = pdev->config + offset; 2018 config[PCI_CAP_LIST_ID] = cap_id; 2019 config[PCI_CAP_LIST_NEXT] = pdev->config[PCI_CAPABILITY_LIST]; 2020 pdev->config[PCI_CAPABILITY_LIST] = offset; 2021 pdev->config[PCI_STATUS] |= PCI_STATUS_CAP_LIST; 2022 memset(pdev->used + offset, 0xFF, QEMU_ALIGN_UP(size, 4)); 2023 /* Make capability read-only by default */ 2024 memset(pdev->wmask + offset, 0, size); 2025 /* Check capability by default */ 2026 memset(pdev->cmask + offset, 0xFF, size); 2027 return offset; 2028 } 2029 2030 /* Unlink capability from the pci config space. */ 2031 void pci_del_capability(PCIDevice *pdev, uint8_t cap_id, uint8_t size) 2032 { 2033 uint8_t prev, offset = pci_find_capability_list(pdev, cap_id, &prev); 2034 if (!offset) 2035 return; 2036 pdev->config[prev] = pdev->config[offset + PCI_CAP_LIST_NEXT]; 2037 /* Make capability writable again */ 2038 memset(pdev->wmask + offset, 0xff, size); 2039 memset(pdev->w1cmask + offset, 0, size); 2040 /* Clear cmask as device-specific registers can't be checked */ 2041 memset(pdev->cmask + offset, 0, size); 2042 memset(pdev->used + offset, 0, QEMU_ALIGN_UP(size, 4)); 2043 2044 if (!pdev->config[PCI_CAPABILITY_LIST]) 2045 pdev->config[PCI_STATUS] &= ~PCI_STATUS_CAP_LIST; 2046 } 2047 2048 uint8_t pci_find_capability(PCIDevice *pdev, uint8_t cap_id) 2049 { 2050 return pci_find_capability_list(pdev, cap_id, NULL); 2051 } 2052 2053 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent) 2054 { 2055 PCIDevice *d = (PCIDevice *)dev; 2056 const pci_class_desc *desc; 2057 char ctxt[64]; 2058 PCIIORegion *r; 2059 int i, class; 2060 2061 class = pci_get_word(d->config + PCI_CLASS_DEVICE); 2062 desc = pci_class_descriptions; 2063 while (desc->desc && class != desc->class) 2064 desc++; 2065 if (desc->desc) { 2066 snprintf(ctxt, sizeof(ctxt), "%s", desc->desc); 2067 } else { 2068 snprintf(ctxt, sizeof(ctxt), "Class %04x", class); 2069 } 2070 2071 monitor_printf(mon, "%*sclass %s, addr %02x:%02x.%x, " 2072 "pci id %04x:%04x (sub %04x:%04x)\n", 2073 indent, "", ctxt, pci_bus_num(d->bus), 2074 PCI_SLOT(d->devfn), PCI_FUNC(d->devfn), 2075 pci_get_word(d->config + PCI_VENDOR_ID), 2076 pci_get_word(d->config + PCI_DEVICE_ID), 2077 pci_get_word(d->config + PCI_SUBSYSTEM_VENDOR_ID), 2078 pci_get_word(d->config + PCI_SUBSYSTEM_ID)); 2079 for (i = 0; i < PCI_NUM_REGIONS; i++) { 2080 r = &d->io_regions[i]; 2081 if (!r->size) 2082 continue; 2083 monitor_printf(mon, "%*sbar %d: %s at 0x%"FMT_PCIBUS 2084 " [0x%"FMT_PCIBUS"]\n", 2085 indent, "", 2086 i, r->type & PCI_BASE_ADDRESS_SPACE_IO ? "i/o" : "mem", 2087 r->addr, r->addr + r->size - 1); 2088 } 2089 } 2090 2091 static char *pci_dev_fw_name(DeviceState *dev, char *buf, int len) 2092 { 2093 PCIDevice *d = (PCIDevice *)dev; 2094 const char *name = NULL; 2095 const pci_class_desc *desc = pci_class_descriptions; 2096 int class = pci_get_word(d->config + PCI_CLASS_DEVICE); 2097 2098 while (desc->desc && 2099 (class & ~desc->fw_ign_bits) != 2100 (desc->class & ~desc->fw_ign_bits)) { 2101 desc++; 2102 } 2103 2104 if (desc->desc) { 2105 name = desc->fw_name; 2106 } 2107 2108 if (name) { 2109 pstrcpy(buf, len, name); 2110 } else { 2111 snprintf(buf, len, "pci%04x,%04x", 2112 pci_get_word(d->config + PCI_VENDOR_ID), 2113 pci_get_word(d->config + PCI_DEVICE_ID)); 2114 } 2115 2116 return buf; 2117 } 2118 2119 static char *pcibus_get_fw_dev_path(DeviceState *dev) 2120 { 2121 PCIDevice *d = (PCIDevice *)dev; 2122 char path[50], name[33]; 2123 int off; 2124 2125 off = snprintf(path, sizeof(path), "%s@%x", 2126 pci_dev_fw_name(dev, name, sizeof name), 2127 PCI_SLOT(d->devfn)); 2128 if (PCI_FUNC(d->devfn)) 2129 snprintf(path + off, sizeof(path) + off, ",%x", PCI_FUNC(d->devfn)); 2130 return g_strdup(path); 2131 } 2132 2133 static char *pcibus_get_dev_path(DeviceState *dev) 2134 { 2135 PCIDevice *d = container_of(dev, PCIDevice, qdev); 2136 PCIDevice *t; 2137 int slot_depth; 2138 /* Path format: Domain:00:Slot.Function:Slot.Function....:Slot.Function. 2139 * 00 is added here to make this format compatible with 2140 * domain:Bus:Slot.Func for systems without nested PCI bridges. 2141 * Slot.Function list specifies the slot and function numbers for all 2142 * devices on the path from root to the specific device. */ 2143 const char *root_bus_path; 2144 int root_bus_len; 2145 char slot[] = ":SS.F"; 2146 int slot_len = sizeof slot - 1 /* For '\0' */; 2147 int path_len; 2148 char *path, *p; 2149 int s; 2150 2151 root_bus_path = pci_root_bus_path(d); 2152 root_bus_len = strlen(root_bus_path); 2153 2154 /* Calculate # of slots on path between device and root. */; 2155 slot_depth = 0; 2156 for (t = d; t; t = t->bus->parent_dev) { 2157 ++slot_depth; 2158 } 2159 2160 path_len = root_bus_len + slot_len * slot_depth; 2161 2162 /* Allocate memory, fill in the terminating null byte. */ 2163 path = g_malloc(path_len + 1 /* For '\0' */); 2164 path[path_len] = '\0'; 2165 2166 memcpy(path, root_bus_path, root_bus_len); 2167 2168 /* Fill in slot numbers. We walk up from device to root, so need to print 2169 * them in the reverse order, last to first. */ 2170 p = path + path_len; 2171 for (t = d; t; t = t->bus->parent_dev) { 2172 p -= slot_len; 2173 s = snprintf(slot, sizeof slot, ":%02x.%x", 2174 PCI_SLOT(t->devfn), PCI_FUNC(t->devfn)); 2175 assert(s == slot_len); 2176 memcpy(p, slot, slot_len); 2177 } 2178 2179 return path; 2180 } 2181 2182 static int pci_qdev_find_recursive(PCIBus *bus, 2183 const char *id, PCIDevice **pdev) 2184 { 2185 DeviceState *qdev = qdev_find_recursive(&bus->qbus, id); 2186 if (!qdev) { 2187 return -ENODEV; 2188 } 2189 2190 /* roughly check if given qdev is pci device */ 2191 if (object_dynamic_cast(OBJECT(qdev), TYPE_PCI_DEVICE)) { 2192 *pdev = PCI_DEVICE(qdev); 2193 return 0; 2194 } 2195 return -EINVAL; 2196 } 2197 2198 int pci_qdev_find_device(const char *id, PCIDevice **pdev) 2199 { 2200 PCIHostState *host_bridge; 2201 int rc = -ENODEV; 2202 2203 QLIST_FOREACH(host_bridge, &pci_host_bridges, next) { 2204 int tmp = pci_qdev_find_recursive(host_bridge->bus, id, pdev); 2205 if (!tmp) { 2206 rc = 0; 2207 break; 2208 } 2209 if (tmp != -ENODEV) { 2210 rc = tmp; 2211 } 2212 } 2213 2214 return rc; 2215 } 2216 2217 MemoryRegion *pci_address_space(PCIDevice *dev) 2218 { 2219 return dev->bus->address_space_mem; 2220 } 2221 2222 MemoryRegion *pci_address_space_io(PCIDevice *dev) 2223 { 2224 return dev->bus->address_space_io; 2225 } 2226 2227 static void pci_device_class_init(ObjectClass *klass, void *data) 2228 { 2229 DeviceClass *k = DEVICE_CLASS(klass); 2230 k->init = pci_qdev_init; 2231 k->unplug = pci_unplug_device; 2232 k->exit = pci_unregister_device; 2233 k->bus_type = TYPE_PCI_BUS; 2234 k->props = pci_props; 2235 } 2236 2237 AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) 2238 { 2239 PCIBus *bus = PCI_BUS(dev->bus); 2240 2241 if (bus->iommu_fn) { 2242 return bus->iommu_fn(bus, bus->iommu_opaque, dev->devfn); 2243 } 2244 2245 if (bus->parent_dev) { 2246 /** We are ignoring the bus master DMA bit of the bridge 2247 * as it would complicate things such as VFIO for no good reason */ 2248 return pci_device_iommu_address_space(bus->parent_dev); 2249 } 2250 2251 return &address_space_memory; 2252 } 2253 2254 void pci_setup_iommu(PCIBus *bus, PCIIOMMUFunc fn, void *opaque) 2255 { 2256 bus->iommu_fn = fn; 2257 bus->iommu_opaque = opaque; 2258 } 2259 2260 static const TypeInfo pci_device_type_info = { 2261 .name = TYPE_PCI_DEVICE, 2262 .parent = TYPE_DEVICE, 2263 .instance_size = sizeof(PCIDevice), 2264 .abstract = true, 2265 .class_size = sizeof(PCIDeviceClass), 2266 .class_init = pci_device_class_init, 2267 }; 2268 2269 static void pci_register_types(void) 2270 { 2271 type_register_static(&pci_bus_info); 2272 type_register_static(&pcie_bus_info); 2273 type_register_static(&pci_device_type_info); 2274 } 2275 2276 type_init(pci_register_types) 2277