1 /* 2 * Copyright (c) 2018, Impinj, Inc. 3 * 4 * Designware PCIe IP block emulation 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see 18 * <http://www.gnu.org/licenses/>. 19 */ 20 21 #include "qemu/osdep.h" 22 #include "qapi/error.h" 23 #include "qemu/module.h" 24 #include "qemu/log.h" 25 #include "hw/pci/msi.h" 26 #include "hw/pci/pci_bridge.h" 27 #include "hw/pci/pci_host.h" 28 #include "hw/pci/pcie_port.h" 29 #include "hw/qdev-properties.h" 30 #include "migration/vmstate.h" 31 #include "hw/irq.h" 32 #include "hw/pci-host/designware.h" 33 34 #define DESIGNWARE_PCIE_PORT_LINK_CONTROL 0x710 35 #define DESIGNWARE_PCIE_PHY_DEBUG_R1 0x72C 36 #define DESIGNWARE_PCIE_PHY_DEBUG_R1_XMLH_LINK_UP BIT(4) 37 #define DESIGNWARE_PCIE_LINK_WIDTH_SPEED_CONTROL 0x80C 38 #define DESIGNWARE_PCIE_PORT_LOGIC_SPEED_CHANGE BIT(17) 39 #define DESIGNWARE_PCIE_MSI_ADDR_LO 0x820 40 #define DESIGNWARE_PCIE_MSI_ADDR_HI 0x824 41 #define DESIGNWARE_PCIE_MSI_INTR0_ENABLE 0x828 42 #define DESIGNWARE_PCIE_MSI_INTR0_MASK 0x82C 43 #define DESIGNWARE_PCIE_MSI_INTR0_STATUS 0x830 44 #define DESIGNWARE_PCIE_ATU_VIEWPORT 0x900 45 #define DESIGNWARE_PCIE_ATU_REGION_INBOUND BIT(31) 46 #define DESIGNWARE_PCIE_ATU_CR1 0x904 47 #define DESIGNWARE_PCIE_ATU_TYPE_MEM (0x0 << 0) 48 #define DESIGNWARE_PCIE_ATU_CR2 0x908 49 #define DESIGNWARE_PCIE_ATU_ENABLE BIT(31) 50 #define DESIGNWARE_PCIE_ATU_LOWER_BASE 0x90C 51 #define DESIGNWARE_PCIE_ATU_UPPER_BASE 0x910 52 #define DESIGNWARE_PCIE_ATU_LIMIT 0x914 53 #define DESIGNWARE_PCIE_ATU_LOWER_TARGET 0x918 54 #define DESIGNWARE_PCIE_ATU_BUS(x) (((x) >> 24) & 0xff) 55 #define DESIGNWARE_PCIE_ATU_DEVFN(x) (((x) >> 16) & 0xff) 56 #define DESIGNWARE_PCIE_ATU_UPPER_TARGET 0x91C 57 58 #define DESIGNWARE_PCIE_IRQ_MSI 3 59 60 static DesignwarePCIEHost * 61 designware_pcie_root_to_host(DesignwarePCIERoot *root) 62 { 63 BusState *bus = qdev_get_parent_bus(DEVICE(root)); 64 return DESIGNWARE_PCIE_HOST(bus->parent); 65 } 66 67 static uint64_t designware_pcie_root_msi_read(void *opaque, hwaddr addr, 68 unsigned size) 69 { 70 /* 71 * Attempts to read from the MSI address are undefined in 72 * the PCI specifications. For this hardware, the datasheet 73 * specifies that a read from the magic address is simply not 74 * intercepted by the MSI controller, and will go out to the 75 * AHB/AXI bus like any other PCI-device-initiated DMA read. 76 * This is not trivial to implement in QEMU, so since 77 * well-behaved guests won't ever ask a PCI device to DMA from 78 * this address we just log the missing functionality. 79 */ 80 qemu_log_mask(LOG_UNIMP, "%s not implemented\n", __func__); 81 return 0; 82 } 83 84 static void designware_pcie_root_msi_write(void *opaque, hwaddr addr, 85 uint64_t val, unsigned len) 86 { 87 DesignwarePCIERoot *root = DESIGNWARE_PCIE_ROOT(opaque); 88 DesignwarePCIEHost *host = designware_pcie_root_to_host(root); 89 90 root->msi.intr[0].status |= BIT(val) & root->msi.intr[0].enable; 91 92 if (root->msi.intr[0].status & ~root->msi.intr[0].mask) { 93 qemu_set_irq(host->pci.irqs[DESIGNWARE_PCIE_IRQ_MSI], 1); 94 } 95 } 96 97 static const MemoryRegionOps designware_pci_host_msi_ops = { 98 .read = designware_pcie_root_msi_read, 99 .write = designware_pcie_root_msi_write, 100 .endianness = DEVICE_LITTLE_ENDIAN, 101 .valid = { 102 .min_access_size = 4, 103 .max_access_size = 4, 104 }, 105 }; 106 107 static void designware_pcie_root_update_msi_mapping(DesignwarePCIERoot *root) 108 109 { 110 MemoryRegion *mem = &root->msi.iomem; 111 const uint64_t base = root->msi.base; 112 const bool enable = root->msi.intr[0].enable; 113 114 memory_region_set_address(mem, base); 115 memory_region_set_enabled(mem, enable); 116 } 117 118 static DesignwarePCIEViewport * 119 designware_pcie_root_get_current_viewport(DesignwarePCIERoot *root) 120 { 121 const unsigned int idx = root->atu_viewport & 0xF; 122 const unsigned int dir = 123 !!(root->atu_viewport & DESIGNWARE_PCIE_ATU_REGION_INBOUND); 124 return &root->viewports[dir][idx]; 125 } 126 127 static uint32_t 128 designware_pcie_root_config_read(PCIDevice *d, uint32_t address, int len) 129 { 130 DesignwarePCIERoot *root = DESIGNWARE_PCIE_ROOT(d); 131 DesignwarePCIEViewport *viewport = 132 designware_pcie_root_get_current_viewport(root); 133 134 uint32_t val; 135 136 switch (address) { 137 case DESIGNWARE_PCIE_PORT_LINK_CONTROL: 138 /* 139 * Linux guest uses this register only to configure number of 140 * PCIE lane (which in our case is irrelevant) and doesn't 141 * really care about the value it reads from this register 142 */ 143 val = 0xDEADBEEF; 144 break; 145 146 case DESIGNWARE_PCIE_LINK_WIDTH_SPEED_CONTROL: 147 /* 148 * To make sure that any code in guest waiting for speed 149 * change does not time out we always report 150 * PORT_LOGIC_SPEED_CHANGE as set 151 */ 152 val = DESIGNWARE_PCIE_PORT_LOGIC_SPEED_CHANGE; 153 break; 154 155 case DESIGNWARE_PCIE_MSI_ADDR_LO: 156 val = root->msi.base; 157 break; 158 159 case DESIGNWARE_PCIE_MSI_ADDR_HI: 160 val = root->msi.base >> 32; 161 break; 162 163 case DESIGNWARE_PCIE_MSI_INTR0_ENABLE: 164 val = root->msi.intr[0].enable; 165 break; 166 167 case DESIGNWARE_PCIE_MSI_INTR0_MASK: 168 val = root->msi.intr[0].mask; 169 break; 170 171 case DESIGNWARE_PCIE_MSI_INTR0_STATUS: 172 val = root->msi.intr[0].status; 173 break; 174 175 case DESIGNWARE_PCIE_PHY_DEBUG_R1: 176 val = DESIGNWARE_PCIE_PHY_DEBUG_R1_XMLH_LINK_UP; 177 break; 178 179 case DESIGNWARE_PCIE_ATU_VIEWPORT: 180 val = root->atu_viewport; 181 break; 182 183 case DESIGNWARE_PCIE_ATU_LOWER_BASE: 184 val = viewport->base; 185 break; 186 187 case DESIGNWARE_PCIE_ATU_UPPER_BASE: 188 val = viewport->base >> 32; 189 break; 190 191 case DESIGNWARE_PCIE_ATU_LOWER_TARGET: 192 val = viewport->target; 193 break; 194 195 case DESIGNWARE_PCIE_ATU_UPPER_TARGET: 196 val = viewport->target >> 32; 197 break; 198 199 case DESIGNWARE_PCIE_ATU_LIMIT: 200 val = viewport->limit; 201 break; 202 203 case DESIGNWARE_PCIE_ATU_CR1: 204 case DESIGNWARE_PCIE_ATU_CR2: 205 val = viewport->cr[(address - DESIGNWARE_PCIE_ATU_CR1) / 206 sizeof(uint32_t)]; 207 break; 208 209 default: 210 val = pci_default_read_config(d, address, len); 211 break; 212 } 213 214 return val; 215 } 216 217 static uint64_t designware_pcie_root_data_access(void *opaque, hwaddr addr, 218 uint64_t *val, unsigned len) 219 { 220 DesignwarePCIEViewport *viewport = opaque; 221 DesignwarePCIERoot *root = viewport->root; 222 223 const uint8_t busnum = DESIGNWARE_PCIE_ATU_BUS(viewport->target); 224 const uint8_t devfn = DESIGNWARE_PCIE_ATU_DEVFN(viewport->target); 225 PCIBus *pcibus = pci_get_bus(PCI_DEVICE(root)); 226 PCIDevice *pcidev = pci_find_device(pcibus, busnum, devfn); 227 228 if (pcidev) { 229 addr &= pci_config_size(pcidev) - 1; 230 231 if (val) { 232 pci_host_config_write_common(pcidev, addr, 233 pci_config_size(pcidev), 234 *val, len); 235 } else { 236 return pci_host_config_read_common(pcidev, addr, 237 pci_config_size(pcidev), 238 len); 239 } 240 } 241 242 return UINT64_MAX; 243 } 244 245 static uint64_t designware_pcie_root_data_read(void *opaque, hwaddr addr, 246 unsigned len) 247 { 248 return designware_pcie_root_data_access(opaque, addr, NULL, len); 249 } 250 251 static void designware_pcie_root_data_write(void *opaque, hwaddr addr, 252 uint64_t val, unsigned len) 253 { 254 designware_pcie_root_data_access(opaque, addr, &val, len); 255 } 256 257 static const MemoryRegionOps designware_pci_host_conf_ops = { 258 .read = designware_pcie_root_data_read, 259 .write = designware_pcie_root_data_write, 260 .endianness = DEVICE_LITTLE_ENDIAN, 261 .valid = { 262 .min_access_size = 1, 263 .max_access_size = 4, 264 }, 265 }; 266 267 static void designware_pcie_update_viewport(DesignwarePCIERoot *root, 268 DesignwarePCIEViewport *viewport) 269 { 270 const uint64_t target = viewport->target; 271 const uint64_t base = viewport->base; 272 const uint64_t size = (uint64_t)viewport->limit - base + 1; 273 const bool enabled = viewport->cr[1] & DESIGNWARE_PCIE_ATU_ENABLE; 274 275 MemoryRegion *current, *other; 276 277 if (viewport->cr[0] == DESIGNWARE_PCIE_ATU_TYPE_MEM) { 278 current = &viewport->mem; 279 other = &viewport->cfg; 280 memory_region_set_alias_offset(current, target); 281 } else { 282 current = &viewport->cfg; 283 other = &viewport->mem; 284 } 285 286 /* 287 * An outbound viewport can be reconfigure from being MEM to CFG, 288 * to account for that we disable the "other" memory region that 289 * becomes unused due to that fact. 290 */ 291 memory_region_set_enabled(other, false); 292 if (enabled) { 293 memory_region_set_size(current, size); 294 memory_region_set_address(current, base); 295 } 296 memory_region_set_enabled(current, enabled); 297 } 298 299 static void designware_pcie_root_config_write(PCIDevice *d, uint32_t address, 300 uint32_t val, int len) 301 { 302 DesignwarePCIERoot *root = DESIGNWARE_PCIE_ROOT(d); 303 DesignwarePCIEHost *host = designware_pcie_root_to_host(root); 304 DesignwarePCIEViewport *viewport = 305 designware_pcie_root_get_current_viewport(root); 306 307 switch (address) { 308 case DESIGNWARE_PCIE_PORT_LINK_CONTROL: 309 case DESIGNWARE_PCIE_LINK_WIDTH_SPEED_CONTROL: 310 case DESIGNWARE_PCIE_PHY_DEBUG_R1: 311 /* No-op */ 312 break; 313 314 case DESIGNWARE_PCIE_MSI_ADDR_LO: 315 root->msi.base &= 0xFFFFFFFF00000000ULL; 316 root->msi.base |= val; 317 designware_pcie_root_update_msi_mapping(root); 318 break; 319 320 case DESIGNWARE_PCIE_MSI_ADDR_HI: 321 root->msi.base &= 0x00000000FFFFFFFFULL; 322 root->msi.base |= (uint64_t)val << 32; 323 designware_pcie_root_update_msi_mapping(root); 324 break; 325 326 case DESIGNWARE_PCIE_MSI_INTR0_ENABLE: 327 root->msi.intr[0].enable = val; 328 designware_pcie_root_update_msi_mapping(root); 329 break; 330 331 case DESIGNWARE_PCIE_MSI_INTR0_MASK: 332 root->msi.intr[0].mask = val; 333 break; 334 335 case DESIGNWARE_PCIE_MSI_INTR0_STATUS: 336 root->msi.intr[0].status ^= val; 337 if (!root->msi.intr[0].status) { 338 qemu_set_irq(host->pci.irqs[DESIGNWARE_PCIE_IRQ_MSI], 0); 339 } 340 break; 341 342 case DESIGNWARE_PCIE_ATU_VIEWPORT: 343 root->atu_viewport = val; 344 break; 345 346 case DESIGNWARE_PCIE_ATU_LOWER_BASE: 347 viewport->base &= 0xFFFFFFFF00000000ULL; 348 viewport->base |= val; 349 break; 350 351 case DESIGNWARE_PCIE_ATU_UPPER_BASE: 352 viewport->base &= 0x00000000FFFFFFFFULL; 353 viewport->base |= (uint64_t)val << 32; 354 break; 355 356 case DESIGNWARE_PCIE_ATU_LOWER_TARGET: 357 viewport->target &= 0xFFFFFFFF00000000ULL; 358 viewport->target |= val; 359 break; 360 361 case DESIGNWARE_PCIE_ATU_UPPER_TARGET: 362 viewport->target &= 0x00000000FFFFFFFFULL; 363 viewport->target |= val; 364 break; 365 366 case DESIGNWARE_PCIE_ATU_LIMIT: 367 viewport->limit = val; 368 break; 369 370 case DESIGNWARE_PCIE_ATU_CR1: 371 viewport->cr[0] = val; 372 break; 373 case DESIGNWARE_PCIE_ATU_CR2: 374 viewport->cr[1] = val; 375 designware_pcie_update_viewport(root, viewport); 376 break; 377 378 default: 379 pci_bridge_write_config(d, address, val, len); 380 break; 381 } 382 } 383 384 static char *designware_pcie_viewport_name(const char *direction, 385 unsigned int i, 386 const char *type) 387 { 388 return g_strdup_printf("PCI %s Viewport %u [%s]", 389 direction, i, type); 390 } 391 392 static void designware_pcie_root_realize(PCIDevice *dev, Error **errp) 393 { 394 DesignwarePCIERoot *root = DESIGNWARE_PCIE_ROOT(dev); 395 DesignwarePCIEHost *host = designware_pcie_root_to_host(root); 396 MemoryRegion *address_space = &host->pci.memory; 397 PCIBridge *br = PCI_BRIDGE(dev); 398 DesignwarePCIEViewport *viewport; 399 /* 400 * Dummy values used for initial configuration of MemoryRegions 401 * that belong to a given viewport 402 */ 403 const hwaddr dummy_offset = 0; 404 const uint64_t dummy_size = 4; 405 size_t i; 406 407 br->bus_name = "dw-pcie"; 408 409 pci_set_word(dev->config + PCI_COMMAND, 410 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); 411 412 pci_config_set_interrupt_pin(dev->config, 1); 413 pci_bridge_initfn(dev, TYPE_PCIE_BUS); 414 415 pcie_port_init_reg(dev); 416 417 pcie_cap_init(dev, 0x70, PCI_EXP_TYPE_ROOT_PORT, 418 0, &error_fatal); 419 420 msi_nonbroken = true; 421 msi_init(dev, 0x50, 32, true, true, &error_fatal); 422 423 for (i = 0; i < DESIGNWARE_PCIE_NUM_VIEWPORTS; i++) { 424 MemoryRegion *source, *destination, *mem; 425 const char *direction; 426 char *name; 427 428 viewport = &root->viewports[DESIGNWARE_PCIE_VIEWPORT_INBOUND][i]; 429 viewport->inbound = true; 430 viewport->base = 0x0000000000000000ULL; 431 viewport->target = 0x0000000000000000ULL; 432 viewport->limit = UINT32_MAX; 433 viewport->cr[0] = DESIGNWARE_PCIE_ATU_TYPE_MEM; 434 435 source = &host->pci.address_space_root; 436 destination = get_system_memory(); 437 direction = "Inbound"; 438 439 /* 440 * Configure MemoryRegion implementing PCI -> CPU memory 441 * access 442 */ 443 mem = &viewport->mem; 444 name = designware_pcie_viewport_name(direction, i, "MEM"); 445 memory_region_init_alias(mem, OBJECT(root), name, destination, 446 dummy_offset, dummy_size); 447 memory_region_add_subregion_overlap(source, dummy_offset, mem, -1); 448 memory_region_set_enabled(mem, false); 449 g_free(name); 450 451 viewport = &root->viewports[DESIGNWARE_PCIE_VIEWPORT_OUTBOUND][i]; 452 viewport->root = root; 453 viewport->inbound = false; 454 viewport->base = 0x0000000000000000ULL; 455 viewport->target = 0x0000000000000000ULL; 456 viewport->limit = UINT32_MAX; 457 viewport->cr[0] = DESIGNWARE_PCIE_ATU_TYPE_MEM; 458 459 destination = &host->pci.memory; 460 direction = "Outbound"; 461 source = get_system_memory(); 462 463 /* 464 * Configure MemoryRegion implementing CPU -> PCI memory 465 * access 466 */ 467 mem = &viewport->mem; 468 name = designware_pcie_viewport_name(direction, i, "MEM"); 469 memory_region_init_alias(mem, OBJECT(root), name, destination, 470 dummy_offset, dummy_size); 471 memory_region_add_subregion(source, dummy_offset, mem); 472 memory_region_set_enabled(mem, false); 473 g_free(name); 474 475 /* 476 * Configure MemoryRegion implementing access to configuration 477 * space 478 */ 479 mem = &viewport->cfg; 480 name = designware_pcie_viewport_name(direction, i, "CFG"); 481 memory_region_init_io(&viewport->cfg, OBJECT(root), 482 &designware_pci_host_conf_ops, 483 viewport, name, dummy_size); 484 memory_region_add_subregion(source, dummy_offset, mem); 485 memory_region_set_enabled(mem, false); 486 g_free(name); 487 } 488 489 /* 490 * If no inbound iATU windows are configured, HW defaults to 491 * letting inbound TLPs to pass in. We emulate that by explicitly 492 * configuring first inbound window to cover all of target's 493 * address space. 494 * 495 * NOTE: This will not work correctly for the case when first 496 * configured inbound window is window 0 497 */ 498 viewport = &root->viewports[DESIGNWARE_PCIE_VIEWPORT_INBOUND][0]; 499 viewport->cr[1] = DESIGNWARE_PCIE_ATU_ENABLE; 500 designware_pcie_update_viewport(root, viewport); 501 502 memory_region_init_io(&root->msi.iomem, OBJECT(root), 503 &designware_pci_host_msi_ops, 504 root, "pcie-msi", 0x4); 505 /* 506 * We initially place MSI interrupt I/O region at address 0 and 507 * disable it. It'll be later moved to correct offset and enabled 508 * in designware_pcie_root_update_msi_mapping() as a part of 509 * initialization done by guest OS 510 */ 511 memory_region_add_subregion(address_space, dummy_offset, &root->msi.iomem); 512 memory_region_set_enabled(&root->msi.iomem, false); 513 } 514 515 static void designware_pcie_set_irq(void *opaque, int irq_num, int level) 516 { 517 DesignwarePCIEHost *host = DESIGNWARE_PCIE_HOST(opaque); 518 519 qemu_set_irq(host->pci.irqs[irq_num], level); 520 } 521 522 static const char * 523 designware_pcie_host_root_bus_path(PCIHostState *host_bridge, PCIBus *rootbus) 524 { 525 return "0000:00"; 526 } 527 528 static const VMStateDescription vmstate_designware_pcie_msi_bank = { 529 .name = "designware-pcie-msi-bank", 530 .version_id = 1, 531 .minimum_version_id = 1, 532 .fields = (VMStateField[]) { 533 VMSTATE_UINT32(enable, DesignwarePCIEMSIBank), 534 VMSTATE_UINT32(mask, DesignwarePCIEMSIBank), 535 VMSTATE_UINT32(status, DesignwarePCIEMSIBank), 536 VMSTATE_END_OF_LIST() 537 } 538 }; 539 540 static const VMStateDescription vmstate_designware_pcie_msi = { 541 .name = "designware-pcie-msi", 542 .version_id = 1, 543 .minimum_version_id = 1, 544 .fields = (VMStateField[]) { 545 VMSTATE_UINT64(base, DesignwarePCIEMSI), 546 VMSTATE_STRUCT_ARRAY(intr, 547 DesignwarePCIEMSI, 548 DESIGNWARE_PCIE_NUM_MSI_BANKS, 549 1, 550 vmstate_designware_pcie_msi_bank, 551 DesignwarePCIEMSIBank), 552 VMSTATE_END_OF_LIST() 553 } 554 }; 555 556 static const VMStateDescription vmstate_designware_pcie_viewport = { 557 .name = "designware-pcie-viewport", 558 .version_id = 1, 559 .minimum_version_id = 1, 560 .fields = (VMStateField[]) { 561 VMSTATE_UINT64(base, DesignwarePCIEViewport), 562 VMSTATE_UINT64(target, DesignwarePCIEViewport), 563 VMSTATE_UINT32(limit, DesignwarePCIEViewport), 564 VMSTATE_UINT32_ARRAY(cr, DesignwarePCIEViewport, 2), 565 VMSTATE_END_OF_LIST() 566 } 567 }; 568 569 static const VMStateDescription vmstate_designware_pcie_root = { 570 .name = "designware-pcie-root", 571 .version_id = 1, 572 .minimum_version_id = 1, 573 .fields = (VMStateField[]) { 574 VMSTATE_PCI_DEVICE(parent_obj, PCIBridge), 575 VMSTATE_UINT32(atu_viewport, DesignwarePCIERoot), 576 VMSTATE_STRUCT_2DARRAY(viewports, 577 DesignwarePCIERoot, 578 2, 579 DESIGNWARE_PCIE_NUM_VIEWPORTS, 580 1, 581 vmstate_designware_pcie_viewport, 582 DesignwarePCIEViewport), 583 VMSTATE_STRUCT(msi, 584 DesignwarePCIERoot, 585 1, 586 vmstate_designware_pcie_msi, 587 DesignwarePCIEMSI), 588 VMSTATE_END_OF_LIST() 589 } 590 }; 591 592 static void designware_pcie_root_class_init(ObjectClass *klass, void *data) 593 { 594 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); 595 DeviceClass *dc = DEVICE_CLASS(klass); 596 597 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 598 599 k->vendor_id = PCI_VENDOR_ID_SYNOPSYS; 600 k->device_id = 0xABCD; 601 k->revision = 0; 602 k->class_id = PCI_CLASS_BRIDGE_PCI; 603 k->exit = pci_bridge_exitfn; 604 k->realize = designware_pcie_root_realize; 605 k->config_read = designware_pcie_root_config_read; 606 k->config_write = designware_pcie_root_config_write; 607 608 dc->reset = pci_bridge_reset; 609 /* 610 * PCI-facing part of the host bridge, not usable without the 611 * host-facing part, which can't be device_add'ed, yet. 612 */ 613 dc->user_creatable = false; 614 dc->vmsd = &vmstate_designware_pcie_root; 615 } 616 617 static uint64_t designware_pcie_host_mmio_read(void *opaque, hwaddr addr, 618 unsigned int size) 619 { 620 PCIHostState *pci = PCI_HOST_BRIDGE(opaque); 621 PCIDevice *device = pci_find_device(pci->bus, 0, 0); 622 623 return pci_host_config_read_common(device, 624 addr, 625 pci_config_size(device), 626 size); 627 } 628 629 static void designware_pcie_host_mmio_write(void *opaque, hwaddr addr, 630 uint64_t val, unsigned int size) 631 { 632 PCIHostState *pci = PCI_HOST_BRIDGE(opaque); 633 PCIDevice *device = pci_find_device(pci->bus, 0, 0); 634 635 return pci_host_config_write_common(device, 636 addr, 637 pci_config_size(device), 638 val, size); 639 } 640 641 static const MemoryRegionOps designware_pci_mmio_ops = { 642 .read = designware_pcie_host_mmio_read, 643 .write = designware_pcie_host_mmio_write, 644 .endianness = DEVICE_LITTLE_ENDIAN, 645 .impl = { 646 /* 647 * Our device would not work correctly if the guest was doing 648 * unaligned access. This might not be a limitation on the real 649 * device but in practice there is no reason for a guest to access 650 * this device unaligned. 651 */ 652 .min_access_size = 4, 653 .max_access_size = 4, 654 .unaligned = false, 655 }, 656 }; 657 658 static AddressSpace *designware_pcie_host_set_iommu(PCIBus *bus, void *opaque, 659 int devfn) 660 { 661 DesignwarePCIEHost *s = DESIGNWARE_PCIE_HOST(opaque); 662 663 return &s->pci.address_space; 664 } 665 666 static const PCIIOMMUOps designware_iommu_ops = { 667 .get_address_space = designware_pcie_host_set_iommu, 668 }; 669 670 static void designware_pcie_host_realize(DeviceState *dev, Error **errp) 671 { 672 PCIHostState *pci = PCI_HOST_BRIDGE(dev); 673 DesignwarePCIEHost *s = DESIGNWARE_PCIE_HOST(dev); 674 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 675 size_t i; 676 677 for (i = 0; i < ARRAY_SIZE(s->pci.irqs); i++) { 678 sysbus_init_irq(sbd, &s->pci.irqs[i]); 679 } 680 681 memory_region_init_io(&s->mmio, 682 OBJECT(s), 683 &designware_pci_mmio_ops, 684 s, 685 "pcie.reg", 4 * 1024); 686 sysbus_init_mmio(sbd, &s->mmio); 687 688 memory_region_init(&s->pci.io, OBJECT(s), "pcie-pio", 16); 689 memory_region_init(&s->pci.memory, OBJECT(s), 690 "pcie-bus-memory", 691 UINT64_MAX); 692 693 pci->bus = pci_register_root_bus(dev, "pcie", 694 designware_pcie_set_irq, 695 pci_swizzle_map_irq_fn, 696 s, 697 &s->pci.memory, 698 &s->pci.io, 699 0, 4, 700 TYPE_PCIE_BUS); 701 pci->bus->flags |= PCI_BUS_EXTENDED_CONFIG_SPACE; 702 703 memory_region_init(&s->pci.address_space_root, 704 OBJECT(s), 705 "pcie-bus-address-space-root", 706 UINT64_MAX); 707 memory_region_add_subregion(&s->pci.address_space_root, 708 0x0, &s->pci.memory); 709 address_space_init(&s->pci.address_space, 710 &s->pci.address_space_root, 711 "pcie-bus-address-space"); 712 pci_setup_iommu(pci->bus, &designware_iommu_ops, s); 713 714 qdev_realize(DEVICE(&s->root), BUS(pci->bus), &error_fatal); 715 } 716 717 static const VMStateDescription vmstate_designware_pcie_host = { 718 .name = "designware-pcie-host", 719 .version_id = 1, 720 .minimum_version_id = 1, 721 .fields = (VMStateField[]) { 722 VMSTATE_STRUCT(root, 723 DesignwarePCIEHost, 724 1, 725 vmstate_designware_pcie_root, 726 DesignwarePCIERoot), 727 VMSTATE_END_OF_LIST() 728 } 729 }; 730 731 static void designware_pcie_host_class_init(ObjectClass *klass, void *data) 732 { 733 DeviceClass *dc = DEVICE_CLASS(klass); 734 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass); 735 736 hc->root_bus_path = designware_pcie_host_root_bus_path; 737 dc->realize = designware_pcie_host_realize; 738 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); 739 dc->fw_name = "pci"; 740 dc->vmsd = &vmstate_designware_pcie_host; 741 } 742 743 static void designware_pcie_host_init(Object *obj) 744 { 745 DesignwarePCIEHost *s = DESIGNWARE_PCIE_HOST(obj); 746 DesignwarePCIERoot *root = &s->root; 747 748 object_initialize_child(obj, "root", root, TYPE_DESIGNWARE_PCIE_ROOT); 749 qdev_prop_set_int32(DEVICE(root), "addr", PCI_DEVFN(0, 0)); 750 qdev_prop_set_bit(DEVICE(root), "multifunction", false); 751 } 752 753 static const TypeInfo designware_pcie_root_info = { 754 .name = TYPE_DESIGNWARE_PCIE_ROOT, 755 .parent = TYPE_PCI_BRIDGE, 756 .instance_size = sizeof(DesignwarePCIERoot), 757 .class_init = designware_pcie_root_class_init, 758 .interfaces = (InterfaceInfo[]) { 759 { INTERFACE_PCIE_DEVICE }, 760 { } 761 }, 762 }; 763 764 static const TypeInfo designware_pcie_host_info = { 765 .name = TYPE_DESIGNWARE_PCIE_HOST, 766 .parent = TYPE_PCI_HOST_BRIDGE, 767 .instance_size = sizeof(DesignwarePCIEHost), 768 .instance_init = designware_pcie_host_init, 769 .class_init = designware_pcie_host_class_init, 770 }; 771 772 static void designware_pcie_register(void) 773 { 774 type_register_static(&designware_pcie_root_info); 775 type_register_static(&designware_pcie_host_info); 776 } 777 type_init(designware_pcie_register) 778