1 /* 2 * s390 PCI BUS 3 * 4 * Copyright 2014 IBM Corp. 5 * Author(s): Frank Blaschka <frank.blaschka@de.ibm.com> 6 * Hong Bo Li <lihbbj@cn.ibm.com> 7 * Yi Min Zhao <zyimin@cn.ibm.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2 or (at 10 * your option) any later version. See the COPYING file in the top-level 11 * directory. 12 */ 13 14 #include "qemu/osdep.h" 15 #include "qapi/error.h" 16 #include "qapi/visitor.h" 17 #include "hw/s390x/s390-pci-bus.h" 18 #include "hw/s390x/s390-pci-inst.h" 19 #include "hw/s390x/s390-pci-vfio.h" 20 #include "hw/pci/pci_bus.h" 21 #include "hw/qdev-properties.h" 22 #include "hw/pci/pci_bridge.h" 23 #include "hw/pci/msi.h" 24 #include "qemu/error-report.h" 25 #include "qemu/module.h" 26 27 #ifndef DEBUG_S390PCI_BUS 28 #define DEBUG_S390PCI_BUS 0 29 #endif 30 31 #define DPRINTF(fmt, ...) \ 32 do { \ 33 if (DEBUG_S390PCI_BUS) { \ 34 fprintf(stderr, "S390pci-bus: " fmt, ## __VA_ARGS__); \ 35 } \ 36 } while (0) 37 38 S390pciState *s390_get_phb(void) 39 { 40 static S390pciState *phb; 41 42 if (!phb) { 43 phb = S390_PCI_HOST_BRIDGE( 44 object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL)); 45 assert(phb != NULL); 46 } 47 48 return phb; 49 } 50 51 int pci_chsc_sei_nt2_get_event(void *res) 52 { 53 ChscSeiNt2Res *nt2_res = (ChscSeiNt2Res *)res; 54 PciCcdfAvail *accdf; 55 PciCcdfErr *eccdf; 56 int rc = 1; 57 SeiContainer *sei_cont; 58 S390pciState *s = s390_get_phb(); 59 60 sei_cont = QTAILQ_FIRST(&s->pending_sei); 61 if (sei_cont) { 62 QTAILQ_REMOVE(&s->pending_sei, sei_cont, link); 63 nt2_res->nt = 2; 64 nt2_res->cc = sei_cont->cc; 65 nt2_res->length = cpu_to_be16(sizeof(ChscSeiNt2Res)); 66 switch (sei_cont->cc) { 67 case 1: /* error event */ 68 eccdf = (PciCcdfErr *)nt2_res->ccdf; 69 eccdf->fid = cpu_to_be32(sei_cont->fid); 70 eccdf->fh = cpu_to_be32(sei_cont->fh); 71 eccdf->e = cpu_to_be32(sei_cont->e); 72 eccdf->faddr = cpu_to_be64(sei_cont->faddr); 73 eccdf->pec = cpu_to_be16(sei_cont->pec); 74 break; 75 case 2: /* availability event */ 76 accdf = (PciCcdfAvail *)nt2_res->ccdf; 77 accdf->fid = cpu_to_be32(sei_cont->fid); 78 accdf->fh = cpu_to_be32(sei_cont->fh); 79 accdf->pec = cpu_to_be16(sei_cont->pec); 80 break; 81 default: 82 abort(); 83 } 84 g_free(sei_cont); 85 rc = 0; 86 } 87 88 return rc; 89 } 90 91 int pci_chsc_sei_nt2_have_event(void) 92 { 93 S390pciState *s = s390_get_phb(); 94 95 return !QTAILQ_EMPTY(&s->pending_sei); 96 } 97 98 S390PCIBusDevice *s390_pci_find_next_avail_dev(S390pciState *s, 99 S390PCIBusDevice *pbdev) 100 { 101 S390PCIBusDevice *ret = pbdev ? QTAILQ_NEXT(pbdev, link) : 102 QTAILQ_FIRST(&s->zpci_devs); 103 104 while (ret && ret->state == ZPCI_FS_RESERVED) { 105 ret = QTAILQ_NEXT(ret, link); 106 } 107 108 return ret; 109 } 110 111 S390PCIBusDevice *s390_pci_find_dev_by_fid(S390pciState *s, uint32_t fid) 112 { 113 S390PCIBusDevice *pbdev; 114 115 QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) { 116 if (pbdev->fid == fid) { 117 return pbdev; 118 } 119 } 120 121 return NULL; 122 } 123 124 void s390_pci_sclp_configure(SCCB *sccb) 125 { 126 IoaCfgSccb *psccb = (IoaCfgSccb *)sccb; 127 S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(s390_get_phb(), 128 be32_to_cpu(psccb->aid)); 129 uint16_t rc; 130 131 if (!pbdev) { 132 DPRINTF("sclp config no dev found\n"); 133 rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED; 134 goto out; 135 } 136 137 switch (pbdev->state) { 138 case ZPCI_FS_RESERVED: 139 rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE; 140 break; 141 case ZPCI_FS_STANDBY: 142 pbdev->state = ZPCI_FS_DISABLED; 143 rc = SCLP_RC_NORMAL_COMPLETION; 144 break; 145 default: 146 rc = SCLP_RC_NO_ACTION_REQUIRED; 147 } 148 out: 149 psccb->header.response_code = cpu_to_be16(rc); 150 } 151 152 static void s390_pci_perform_unplug(S390PCIBusDevice *pbdev) 153 { 154 HotplugHandler *hotplug_ctrl; 155 156 /* Unplug the PCI device */ 157 if (pbdev->pdev) { 158 DeviceState *pdev = DEVICE(pbdev->pdev); 159 160 hotplug_ctrl = qdev_get_hotplug_handler(pdev); 161 hotplug_handler_unplug(hotplug_ctrl, pdev, &error_abort); 162 object_unparent(OBJECT(pdev)); 163 } 164 165 /* Unplug the zPCI device */ 166 hotplug_ctrl = qdev_get_hotplug_handler(DEVICE(pbdev)); 167 hotplug_handler_unplug(hotplug_ctrl, DEVICE(pbdev), &error_abort); 168 object_unparent(OBJECT(pbdev)); 169 } 170 171 void s390_pci_sclp_deconfigure(SCCB *sccb) 172 { 173 IoaCfgSccb *psccb = (IoaCfgSccb *)sccb; 174 S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(s390_get_phb(), 175 be32_to_cpu(psccb->aid)); 176 uint16_t rc; 177 178 if (!pbdev) { 179 DPRINTF("sclp deconfig no dev found\n"); 180 rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED; 181 goto out; 182 } 183 184 switch (pbdev->state) { 185 case ZPCI_FS_RESERVED: 186 rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE; 187 break; 188 case ZPCI_FS_STANDBY: 189 rc = SCLP_RC_NO_ACTION_REQUIRED; 190 break; 191 default: 192 if (pbdev->summary_ind) { 193 pci_dereg_irqs(pbdev); 194 } 195 if (pbdev->iommu->enabled) { 196 pci_dereg_ioat(pbdev->iommu); 197 } 198 pbdev->state = ZPCI_FS_STANDBY; 199 rc = SCLP_RC_NORMAL_COMPLETION; 200 201 if (pbdev->unplug_requested) { 202 s390_pci_perform_unplug(pbdev); 203 } 204 } 205 out: 206 psccb->header.response_code = cpu_to_be16(rc); 207 } 208 209 static S390PCIBusDevice *s390_pci_find_dev_by_uid(S390pciState *s, uint16_t uid) 210 { 211 S390PCIBusDevice *pbdev; 212 213 QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) { 214 if (pbdev->uid == uid) { 215 return pbdev; 216 } 217 } 218 219 return NULL; 220 } 221 222 S390PCIBusDevice *s390_pci_find_dev_by_target(S390pciState *s, 223 const char *target) 224 { 225 S390PCIBusDevice *pbdev; 226 227 if (!target) { 228 return NULL; 229 } 230 231 QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) { 232 if (!strcmp(pbdev->target, target)) { 233 return pbdev; 234 } 235 } 236 237 return NULL; 238 } 239 240 static S390PCIBusDevice *s390_pci_find_dev_by_pci(S390pciState *s, 241 PCIDevice *pci_dev) 242 { 243 S390PCIBusDevice *pbdev; 244 245 if (!pci_dev) { 246 return NULL; 247 } 248 249 QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) { 250 if (pbdev->pdev == pci_dev) { 251 return pbdev; 252 } 253 } 254 255 return NULL; 256 } 257 258 S390PCIBusDevice *s390_pci_find_dev_by_idx(S390pciState *s, uint32_t idx) 259 { 260 return g_hash_table_lookup(s->zpci_table, &idx); 261 } 262 263 S390PCIBusDevice *s390_pci_find_dev_by_fh(S390pciState *s, uint32_t fh) 264 { 265 uint32_t idx = FH_MASK_INDEX & fh; 266 S390PCIBusDevice *pbdev = s390_pci_find_dev_by_idx(s, idx); 267 268 if (pbdev && pbdev->fh == fh) { 269 return pbdev; 270 } 271 272 return NULL; 273 } 274 275 static void s390_pci_generate_event(uint8_t cc, uint16_t pec, uint32_t fh, 276 uint32_t fid, uint64_t faddr, uint32_t e) 277 { 278 SeiContainer *sei_cont; 279 S390pciState *s = s390_get_phb(); 280 281 sei_cont = g_new0(SeiContainer, 1); 282 sei_cont->fh = fh; 283 sei_cont->fid = fid; 284 sei_cont->cc = cc; 285 sei_cont->pec = pec; 286 sei_cont->faddr = faddr; 287 sei_cont->e = e; 288 289 QTAILQ_INSERT_TAIL(&s->pending_sei, sei_cont, link); 290 css_generate_css_crws(0); 291 } 292 293 static void s390_pci_generate_plug_event(uint16_t pec, uint32_t fh, 294 uint32_t fid) 295 { 296 s390_pci_generate_event(2, pec, fh, fid, 0, 0); 297 } 298 299 void s390_pci_generate_error_event(uint16_t pec, uint32_t fh, uint32_t fid, 300 uint64_t faddr, uint32_t e) 301 { 302 s390_pci_generate_event(1, pec, fh, fid, faddr, e); 303 } 304 305 static void s390_pci_set_irq(void *opaque, int irq, int level) 306 { 307 /* nothing to do */ 308 } 309 310 static int s390_pci_map_irq(PCIDevice *pci_dev, int irq_num) 311 { 312 /* nothing to do */ 313 return 0; 314 } 315 316 static uint64_t s390_pci_get_table_origin(uint64_t iota) 317 { 318 return iota & ~ZPCI_IOTA_RTTO_FLAG; 319 } 320 321 static unsigned int calc_rtx(dma_addr_t ptr) 322 { 323 return ((unsigned long) ptr >> ZPCI_RT_SHIFT) & ZPCI_INDEX_MASK; 324 } 325 326 static unsigned int calc_sx(dma_addr_t ptr) 327 { 328 return ((unsigned long) ptr >> ZPCI_ST_SHIFT) & ZPCI_INDEX_MASK; 329 } 330 331 static unsigned int calc_px(dma_addr_t ptr) 332 { 333 return ((unsigned long) ptr >> TARGET_PAGE_BITS) & ZPCI_PT_MASK; 334 } 335 336 static uint64_t get_rt_sto(uint64_t entry) 337 { 338 return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_RTX) 339 ? (entry & ZPCI_RTE_ADDR_MASK) 340 : 0; 341 } 342 343 static uint64_t get_st_pto(uint64_t entry) 344 { 345 return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_SX) 346 ? (entry & ZPCI_STE_ADDR_MASK) 347 : 0; 348 } 349 350 static bool rt_entry_isvalid(uint64_t entry) 351 { 352 return (entry & ZPCI_TABLE_VALID_MASK) == ZPCI_TABLE_VALID; 353 } 354 355 static bool pt_entry_isvalid(uint64_t entry) 356 { 357 return (entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_VALID; 358 } 359 360 static bool entry_isprotected(uint64_t entry) 361 { 362 return (entry & ZPCI_TABLE_PROT_MASK) == ZPCI_TABLE_PROTECTED; 363 } 364 365 /* ett is expected table type, -1 page table, 0 segment table, 1 region table */ 366 static uint64_t get_table_index(uint64_t iova, int8_t ett) 367 { 368 switch (ett) { 369 case ZPCI_ETT_PT: 370 return calc_px(iova); 371 case ZPCI_ETT_ST: 372 return calc_sx(iova); 373 case ZPCI_ETT_RT: 374 return calc_rtx(iova); 375 } 376 377 return -1; 378 } 379 380 static bool entry_isvalid(uint64_t entry, int8_t ett) 381 { 382 switch (ett) { 383 case ZPCI_ETT_PT: 384 return pt_entry_isvalid(entry); 385 case ZPCI_ETT_ST: 386 case ZPCI_ETT_RT: 387 return rt_entry_isvalid(entry); 388 } 389 390 return false; 391 } 392 393 /* Return true if address translation is done */ 394 static bool translate_iscomplete(uint64_t entry, int8_t ett) 395 { 396 switch (ett) { 397 case 0: 398 return (entry & ZPCI_TABLE_FC) ? true : false; 399 case 1: 400 return false; 401 } 402 403 return true; 404 } 405 406 static uint64_t get_frame_size(int8_t ett) 407 { 408 switch (ett) { 409 case ZPCI_ETT_PT: 410 return 1ULL << 12; 411 case ZPCI_ETT_ST: 412 return 1ULL << 20; 413 case ZPCI_ETT_RT: 414 return 1ULL << 31; 415 } 416 417 return 0; 418 } 419 420 static uint64_t get_next_table_origin(uint64_t entry, int8_t ett) 421 { 422 switch (ett) { 423 case ZPCI_ETT_PT: 424 return entry & ZPCI_PTE_ADDR_MASK; 425 case ZPCI_ETT_ST: 426 return get_st_pto(entry); 427 case ZPCI_ETT_RT: 428 return get_rt_sto(entry); 429 } 430 431 return 0; 432 } 433 434 /** 435 * table_translate: do translation within one table and return the following 436 * table origin 437 * 438 * @entry: the entry being translated, the result is stored in this. 439 * @to: the address of table origin. 440 * @ett: expected table type, 1 region table, 0 segment table and -1 page table. 441 * @error: error code 442 */ 443 static uint64_t table_translate(S390IOTLBEntry *entry, uint64_t to, int8_t ett, 444 uint16_t *error) 445 { 446 uint64_t tx, te, nto = 0; 447 uint16_t err = 0; 448 449 tx = get_table_index(entry->iova, ett); 450 te = address_space_ldq(&address_space_memory, to + tx * sizeof(uint64_t), 451 MEMTXATTRS_UNSPECIFIED, NULL); 452 453 if (!te) { 454 err = ERR_EVENT_INVALTE; 455 goto out; 456 } 457 458 if (!entry_isvalid(te, ett)) { 459 entry->perm &= IOMMU_NONE; 460 goto out; 461 } 462 463 if (ett == ZPCI_ETT_RT && ((te & ZPCI_TABLE_LEN_RTX) != ZPCI_TABLE_LEN_RTX 464 || te & ZPCI_TABLE_OFFSET_MASK)) { 465 err = ERR_EVENT_INVALTL; 466 goto out; 467 } 468 469 nto = get_next_table_origin(te, ett); 470 if (!nto) { 471 err = ERR_EVENT_TT; 472 goto out; 473 } 474 475 if (entry_isprotected(te)) { 476 entry->perm &= IOMMU_RO; 477 } else { 478 entry->perm &= IOMMU_RW; 479 } 480 481 if (translate_iscomplete(te, ett)) { 482 switch (ett) { 483 case ZPCI_ETT_PT: 484 entry->translated_addr = te & ZPCI_PTE_ADDR_MASK; 485 break; 486 case ZPCI_ETT_ST: 487 entry->translated_addr = (te & ZPCI_SFAA_MASK) | 488 (entry->iova & ~ZPCI_SFAA_MASK); 489 break; 490 } 491 nto = 0; 492 } 493 out: 494 if (err) { 495 entry->perm = IOMMU_NONE; 496 *error = err; 497 } 498 entry->len = get_frame_size(ett); 499 return nto; 500 } 501 502 uint16_t s390_guest_io_table_walk(uint64_t g_iota, hwaddr addr, 503 S390IOTLBEntry *entry) 504 { 505 uint64_t to = s390_pci_get_table_origin(g_iota); 506 int8_t ett = 1; 507 uint16_t error = 0; 508 509 entry->iova = addr & TARGET_PAGE_MASK; 510 entry->translated_addr = 0; 511 entry->perm = IOMMU_RW; 512 513 if (entry_isprotected(g_iota)) { 514 entry->perm &= IOMMU_RO; 515 } 516 517 while (to) { 518 to = table_translate(entry, to, ett--, &error); 519 } 520 521 return error; 522 } 523 524 static IOMMUTLBEntry s390_translate_iommu(IOMMUMemoryRegion *mr, hwaddr addr, 525 IOMMUAccessFlags flag, int iommu_idx) 526 { 527 S390PCIIOMMU *iommu = container_of(mr, S390PCIIOMMU, iommu_mr); 528 S390IOTLBEntry *entry; 529 uint64_t iova = addr & TARGET_PAGE_MASK; 530 uint16_t error = 0; 531 IOMMUTLBEntry ret = { 532 .target_as = &address_space_memory, 533 .iova = 0, 534 .translated_addr = 0, 535 .addr_mask = ~(hwaddr)0, 536 .perm = IOMMU_NONE, 537 }; 538 539 switch (iommu->pbdev->state) { 540 case ZPCI_FS_ENABLED: 541 case ZPCI_FS_BLOCKED: 542 if (!iommu->enabled) { 543 return ret; 544 } 545 break; 546 default: 547 return ret; 548 } 549 550 DPRINTF("iommu trans addr 0x%" PRIx64 "\n", addr); 551 552 if (addr < iommu->pba || addr > iommu->pal) { 553 error = ERR_EVENT_OORANGE; 554 goto err; 555 } 556 557 entry = g_hash_table_lookup(iommu->iotlb, &iova); 558 if (entry) { 559 ret.iova = entry->iova; 560 ret.translated_addr = entry->translated_addr; 561 ret.addr_mask = entry->len - 1; 562 ret.perm = entry->perm; 563 } else { 564 ret.iova = iova; 565 ret.addr_mask = ~TARGET_PAGE_MASK; 566 ret.perm = IOMMU_NONE; 567 } 568 569 if (flag != IOMMU_NONE && !(flag & ret.perm)) { 570 error = ERR_EVENT_TPROTE; 571 } 572 err: 573 if (error) { 574 iommu->pbdev->state = ZPCI_FS_ERROR; 575 s390_pci_generate_error_event(error, iommu->pbdev->fh, 576 iommu->pbdev->fid, addr, 0); 577 } 578 return ret; 579 } 580 581 static void s390_pci_iommu_replay(IOMMUMemoryRegion *iommu, 582 IOMMUNotifier *notifier) 583 { 584 /* It's impossible to plug a pci device on s390x that already has iommu 585 * mappings which need to be replayed, that is due to the "one iommu per 586 * zpci device" construct. But when we support migration of vfio-pci 587 * devices in future, we need to revisit this. 588 */ 589 return; 590 } 591 592 static S390PCIIOMMU *s390_pci_get_iommu(S390pciState *s, PCIBus *bus, 593 int devfn) 594 { 595 uint64_t key = (uintptr_t)bus; 596 S390PCIIOMMUTable *table = g_hash_table_lookup(s->iommu_table, &key); 597 S390PCIIOMMU *iommu; 598 599 if (!table) { 600 table = g_new0(S390PCIIOMMUTable, 1); 601 table->key = key; 602 g_hash_table_insert(s->iommu_table, &table->key, table); 603 } 604 605 iommu = table->iommu[PCI_SLOT(devfn)]; 606 if (!iommu) { 607 iommu = S390_PCI_IOMMU(object_new(TYPE_S390_PCI_IOMMU)); 608 609 char *mr_name = g_strdup_printf("iommu-root-%02x:%02x.%01x", 610 pci_bus_num(bus), 611 PCI_SLOT(devfn), 612 PCI_FUNC(devfn)); 613 char *as_name = g_strdup_printf("iommu-pci-%02x:%02x.%01x", 614 pci_bus_num(bus), 615 PCI_SLOT(devfn), 616 PCI_FUNC(devfn)); 617 memory_region_init(&iommu->mr, OBJECT(iommu), mr_name, UINT64_MAX); 618 address_space_init(&iommu->as, &iommu->mr, as_name); 619 iommu->iotlb = g_hash_table_new_full(g_int64_hash, g_int64_equal, 620 NULL, g_free); 621 table->iommu[PCI_SLOT(devfn)] = iommu; 622 623 g_free(mr_name); 624 g_free(as_name); 625 } 626 627 return iommu; 628 } 629 630 static AddressSpace *s390_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn) 631 { 632 S390pciState *s = opaque; 633 S390PCIIOMMU *iommu = s390_pci_get_iommu(s, bus, devfn); 634 635 return &iommu->as; 636 } 637 638 static uint8_t set_ind_atomic(uint64_t ind_loc, uint8_t to_be_set) 639 { 640 uint8_t expected, actual; 641 hwaddr len = 1; 642 /* avoid multiple fetches */ 643 uint8_t volatile *ind_addr; 644 645 ind_addr = cpu_physical_memory_map(ind_loc, &len, true); 646 if (!ind_addr) { 647 s390_pci_generate_error_event(ERR_EVENT_AIRERR, 0, 0, 0, 0); 648 return -1; 649 } 650 actual = *ind_addr; 651 do { 652 expected = actual; 653 actual = qatomic_cmpxchg(ind_addr, expected, expected | to_be_set); 654 } while (actual != expected); 655 cpu_physical_memory_unmap((void *)ind_addr, len, 1, len); 656 657 return actual; 658 } 659 660 static void s390_msi_ctrl_write(void *opaque, hwaddr addr, uint64_t data, 661 unsigned int size) 662 { 663 S390PCIBusDevice *pbdev = opaque; 664 uint32_t vec = data & ZPCI_MSI_VEC_MASK; 665 uint64_t ind_bit; 666 uint32_t sum_bit; 667 668 assert(pbdev); 669 DPRINTF("write_msix data 0x%" PRIx64 " idx %d vec 0x%x\n", data, 670 pbdev->idx, vec); 671 672 if (pbdev->state != ZPCI_FS_ENABLED) { 673 return; 674 } 675 676 ind_bit = pbdev->routes.adapter.ind_offset; 677 sum_bit = pbdev->routes.adapter.summary_offset; 678 679 set_ind_atomic(pbdev->routes.adapter.ind_addr + (ind_bit + vec) / 8, 680 0x80 >> ((ind_bit + vec) % 8)); 681 if (!set_ind_atomic(pbdev->routes.adapter.summary_addr + sum_bit / 8, 682 0x80 >> (sum_bit % 8))) { 683 css_adapter_interrupt(CSS_IO_ADAPTER_PCI, pbdev->isc); 684 } 685 } 686 687 static uint64_t s390_msi_ctrl_read(void *opaque, hwaddr addr, unsigned size) 688 { 689 return 0xffffffff; 690 } 691 692 static const MemoryRegionOps s390_msi_ctrl_ops = { 693 .write = s390_msi_ctrl_write, 694 .read = s390_msi_ctrl_read, 695 .endianness = DEVICE_LITTLE_ENDIAN, 696 }; 697 698 void s390_pci_iommu_enable(S390PCIIOMMU *iommu) 699 { 700 /* 701 * The iommu region is initialized against a 0-mapped address space, 702 * so the smallest IOMMU region we can define runs from 0 to the end 703 * of the PCI address space. 704 */ 705 char *name = g_strdup_printf("iommu-s390-%04x", iommu->pbdev->uid); 706 memory_region_init_iommu(&iommu->iommu_mr, sizeof(iommu->iommu_mr), 707 TYPE_S390_IOMMU_MEMORY_REGION, OBJECT(&iommu->mr), 708 name, iommu->pal + 1); 709 iommu->enabled = true; 710 memory_region_add_subregion(&iommu->mr, 0, MEMORY_REGION(&iommu->iommu_mr)); 711 g_free(name); 712 } 713 714 void s390_pci_iommu_disable(S390PCIIOMMU *iommu) 715 { 716 iommu->enabled = false; 717 g_hash_table_remove_all(iommu->iotlb); 718 memory_region_del_subregion(&iommu->mr, MEMORY_REGION(&iommu->iommu_mr)); 719 object_unparent(OBJECT(&iommu->iommu_mr)); 720 } 721 722 static void s390_pci_iommu_free(S390pciState *s, PCIBus *bus, int32_t devfn) 723 { 724 uint64_t key = (uintptr_t)bus; 725 S390PCIIOMMUTable *table = g_hash_table_lookup(s->iommu_table, &key); 726 S390PCIIOMMU *iommu = table ? table->iommu[PCI_SLOT(devfn)] : NULL; 727 728 if (!table || !iommu) { 729 return; 730 } 731 732 table->iommu[PCI_SLOT(devfn)] = NULL; 733 g_hash_table_destroy(iommu->iotlb); 734 /* 735 * An attached PCI device may have memory listeners, eg. VFIO PCI. 736 * The associated subregion will already have been unmapped in 737 * s390_pci_iommu_disable in response to the guest deconfigure request. 738 * Remove the listeners now before destroying the address space. 739 */ 740 address_space_remove_listeners(&iommu->as); 741 address_space_destroy(&iommu->as); 742 object_unparent(OBJECT(&iommu->mr)); 743 object_unparent(OBJECT(iommu)); 744 object_unref(OBJECT(iommu)); 745 } 746 747 S390PCIGroup *s390_group_create(int id) 748 { 749 S390PCIGroup *group; 750 S390pciState *s = s390_get_phb(); 751 752 group = g_new0(S390PCIGroup, 1); 753 group->id = id; 754 QTAILQ_INSERT_TAIL(&s->zpci_groups, group, link); 755 return group; 756 } 757 758 S390PCIGroup *s390_group_find(int id) 759 { 760 S390PCIGroup *group; 761 S390pciState *s = s390_get_phb(); 762 763 QTAILQ_FOREACH(group, &s->zpci_groups, link) { 764 if (group->id == id) { 765 return group; 766 } 767 } 768 return NULL; 769 } 770 771 static void s390_pci_init_default_group(void) 772 { 773 S390PCIGroup *group; 774 ClpRspQueryPciGrp *resgrp; 775 776 group = s390_group_create(ZPCI_DEFAULT_FN_GRP); 777 resgrp = &group->zpci_group; 778 resgrp->fr = 1; 779 resgrp->dasm = 0; 780 resgrp->msia = ZPCI_MSI_ADDR; 781 resgrp->mui = DEFAULT_MUI; 782 resgrp->i = 128; 783 resgrp->maxstbl = 128; 784 resgrp->version = 0; 785 } 786 787 static void set_pbdev_info(S390PCIBusDevice *pbdev) 788 { 789 pbdev->zpci_fn.sdma = ZPCI_SDMA_ADDR; 790 pbdev->zpci_fn.edma = ZPCI_EDMA_ADDR; 791 pbdev->zpci_fn.pchid = 0; 792 pbdev->zpci_fn.pfgid = ZPCI_DEFAULT_FN_GRP; 793 pbdev->zpci_fn.fid = pbdev->fid; 794 pbdev->zpci_fn.uid = pbdev->uid; 795 pbdev->pci_group = s390_group_find(ZPCI_DEFAULT_FN_GRP); 796 } 797 798 static void s390_pcihost_realize(DeviceState *dev, Error **errp) 799 { 800 PCIBus *b; 801 BusState *bus; 802 PCIHostState *phb = PCI_HOST_BRIDGE(dev); 803 S390pciState *s = S390_PCI_HOST_BRIDGE(dev); 804 805 DPRINTF("host_init\n"); 806 807 b = pci_register_root_bus(dev, NULL, s390_pci_set_irq, s390_pci_map_irq, 808 NULL, get_system_memory(), get_system_io(), 0, 809 64, TYPE_PCI_BUS); 810 pci_setup_iommu(b, s390_pci_dma_iommu, s); 811 812 bus = BUS(b); 813 qbus_set_hotplug_handler(bus, OBJECT(dev)); 814 phb->bus = b; 815 816 s->bus = S390_PCI_BUS(qbus_new(TYPE_S390_PCI_BUS, dev, NULL)); 817 qbus_set_hotplug_handler(BUS(s->bus), OBJECT(dev)); 818 819 s->iommu_table = g_hash_table_new_full(g_int64_hash, g_int64_equal, 820 NULL, g_free); 821 s->zpci_table = g_hash_table_new_full(g_int_hash, g_int_equal, NULL, NULL); 822 s->bus_no = 0; 823 QTAILQ_INIT(&s->pending_sei); 824 QTAILQ_INIT(&s->zpci_devs); 825 QTAILQ_INIT(&s->zpci_dma_limit); 826 QTAILQ_INIT(&s->zpci_groups); 827 828 s390_pci_init_default_group(); 829 css_register_io_adapters(CSS_IO_ADAPTER_PCI, true, false, 830 S390_ADAPTER_SUPPRESSIBLE, errp); 831 } 832 833 static void s390_pcihost_unrealize(DeviceState *dev) 834 { 835 S390PCIGroup *group; 836 S390pciState *s = S390_PCI_HOST_BRIDGE(dev); 837 838 while (!QTAILQ_EMPTY(&s->zpci_groups)) { 839 group = QTAILQ_FIRST(&s->zpci_groups); 840 QTAILQ_REMOVE(&s->zpci_groups, group, link); 841 } 842 } 843 844 static int s390_pci_msix_init(S390PCIBusDevice *pbdev) 845 { 846 char *name; 847 uint8_t pos; 848 uint16_t ctrl; 849 uint32_t table, pba; 850 851 pos = pci_find_capability(pbdev->pdev, PCI_CAP_ID_MSIX); 852 if (!pos) { 853 return -1; 854 } 855 856 ctrl = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_FLAGS, 857 pci_config_size(pbdev->pdev), sizeof(ctrl)); 858 table = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_TABLE, 859 pci_config_size(pbdev->pdev), sizeof(table)); 860 pba = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_PBA, 861 pci_config_size(pbdev->pdev), sizeof(pba)); 862 863 pbdev->msix.table_bar = table & PCI_MSIX_FLAGS_BIRMASK; 864 pbdev->msix.table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK; 865 pbdev->msix.pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK; 866 pbdev->msix.pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK; 867 pbdev->msix.entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1; 868 869 name = g_strdup_printf("msix-s390-%04x", pbdev->uid); 870 memory_region_init_io(&pbdev->msix_notify_mr, OBJECT(pbdev), 871 &s390_msi_ctrl_ops, pbdev, name, TARGET_PAGE_SIZE); 872 memory_region_add_subregion(&pbdev->iommu->mr, 873 pbdev->pci_group->zpci_group.msia, 874 &pbdev->msix_notify_mr); 875 g_free(name); 876 877 return 0; 878 } 879 880 static void s390_pci_msix_free(S390PCIBusDevice *pbdev) 881 { 882 memory_region_del_subregion(&pbdev->iommu->mr, &pbdev->msix_notify_mr); 883 object_unparent(OBJECT(&pbdev->msix_notify_mr)); 884 } 885 886 static S390PCIBusDevice *s390_pci_device_new(S390pciState *s, 887 const char *target, Error **errp) 888 { 889 Error *local_err = NULL; 890 DeviceState *dev; 891 892 dev = qdev_try_new(TYPE_S390_PCI_DEVICE); 893 if (!dev) { 894 error_setg(errp, "zPCI device could not be created"); 895 return NULL; 896 } 897 898 if (!object_property_set_str(OBJECT(dev), "target", target, &local_err)) { 899 object_unparent(OBJECT(dev)); 900 error_propagate_prepend(errp, local_err, 901 "zPCI device could not be created: "); 902 return NULL; 903 } 904 if (!qdev_realize_and_unref(dev, BUS(s->bus), &local_err)) { 905 object_unparent(OBJECT(dev)); 906 error_propagate_prepend(errp, local_err, 907 "zPCI device could not be created: "); 908 return NULL; 909 } 910 911 return S390_PCI_DEVICE(dev); 912 } 913 914 static bool s390_pci_alloc_idx(S390pciState *s, S390PCIBusDevice *pbdev) 915 { 916 uint32_t idx; 917 918 idx = s->next_idx; 919 while (s390_pci_find_dev_by_idx(s, idx)) { 920 idx = (idx + 1) & FH_MASK_INDEX; 921 if (idx == s->next_idx) { 922 return false; 923 } 924 } 925 926 pbdev->idx = idx; 927 return true; 928 } 929 930 static void s390_pcihost_pre_plug(HotplugHandler *hotplug_dev, DeviceState *dev, 931 Error **errp) 932 { 933 S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev); 934 935 if (!s390_has_feat(S390_FEAT_ZPCI)) { 936 warn_report("Plugging a PCI/zPCI device without the 'zpci' CPU " 937 "feature enabled; the guest will not be able to see/use " 938 "this device"); 939 } 940 941 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { 942 PCIDevice *pdev = PCI_DEVICE(dev); 943 944 if (pdev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { 945 error_setg(errp, "multifunction not supported in s390"); 946 return; 947 } 948 } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) { 949 S390PCIBusDevice *pbdev = S390_PCI_DEVICE(dev); 950 951 if (!s390_pci_alloc_idx(s, pbdev)) { 952 error_setg(errp, "no slot for plugging zpci device"); 953 return; 954 } 955 } 956 } 957 958 static void s390_pci_update_subordinate(PCIDevice *dev, uint32_t nr) 959 { 960 uint32_t old_nr; 961 962 pci_default_write_config(dev, PCI_SUBORDINATE_BUS, nr, 1); 963 while (!pci_bus_is_root(pci_get_bus(dev))) { 964 dev = pci_get_bus(dev)->parent_dev; 965 966 old_nr = pci_default_read_config(dev, PCI_SUBORDINATE_BUS, 1); 967 if (old_nr < nr) { 968 pci_default_write_config(dev, PCI_SUBORDINATE_BUS, nr, 1); 969 } 970 } 971 } 972 973 static void s390_pcihost_plug(HotplugHandler *hotplug_dev, DeviceState *dev, 974 Error **errp) 975 { 976 S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev); 977 PCIDevice *pdev = NULL; 978 S390PCIBusDevice *pbdev = NULL; 979 980 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) { 981 PCIBridge *pb = PCI_BRIDGE(dev); 982 983 pdev = PCI_DEVICE(dev); 984 pci_bridge_map_irq(pb, dev->id, s390_pci_map_irq); 985 pci_setup_iommu(&pb->sec_bus, s390_pci_dma_iommu, s); 986 987 qbus_set_hotplug_handler(BUS(&pb->sec_bus), OBJECT(s)); 988 989 if (dev->hotplugged) { 990 pci_default_write_config(pdev, PCI_PRIMARY_BUS, 991 pci_dev_bus_num(pdev), 1); 992 s->bus_no += 1; 993 pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1); 994 995 s390_pci_update_subordinate(pdev, s->bus_no); 996 } 997 } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { 998 pdev = PCI_DEVICE(dev); 999 1000 if (!dev->id) { 1001 /* In the case the PCI device does not define an id */ 1002 /* we generate one based on the PCI address */ 1003 dev->id = g_strdup_printf("auto_%02x:%02x.%01x", 1004 pci_dev_bus_num(pdev), 1005 PCI_SLOT(pdev->devfn), 1006 PCI_FUNC(pdev->devfn)); 1007 } 1008 1009 pbdev = s390_pci_find_dev_by_target(s, dev->id); 1010 if (!pbdev) { 1011 pbdev = s390_pci_device_new(s, dev->id, errp); 1012 if (!pbdev) { 1013 return; 1014 } 1015 } 1016 1017 pbdev->pdev = pdev; 1018 pbdev->iommu = s390_pci_get_iommu(s, pci_get_bus(pdev), pdev->devfn); 1019 pbdev->iommu->pbdev = pbdev; 1020 pbdev->state = ZPCI_FS_DISABLED; 1021 set_pbdev_info(pbdev); 1022 1023 if (object_dynamic_cast(OBJECT(dev), "vfio-pci")) { 1024 pbdev->fh |= FH_SHM_VFIO; 1025 pbdev->iommu->dma_limit = s390_pci_start_dma_count(s, pbdev); 1026 /* Fill in CLP information passed via the vfio region */ 1027 s390_pci_get_clp_info(pbdev); 1028 } else { 1029 pbdev->fh |= FH_SHM_EMUL; 1030 } 1031 1032 if (s390_pci_msix_init(pbdev)) { 1033 error_setg(errp, "MSI-X support is mandatory " 1034 "in the S390 architecture"); 1035 return; 1036 } 1037 1038 if (dev->hotplugged) { 1039 s390_pci_generate_plug_event(HP_EVENT_TO_CONFIGURED , 1040 pbdev->fh, pbdev->fid); 1041 } 1042 } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) { 1043 pbdev = S390_PCI_DEVICE(dev); 1044 1045 /* the allocated idx is actually getting used */ 1046 s->next_idx = (pbdev->idx + 1) & FH_MASK_INDEX; 1047 pbdev->fh = pbdev->idx; 1048 QTAILQ_INSERT_TAIL(&s->zpci_devs, pbdev, link); 1049 g_hash_table_insert(s->zpci_table, &pbdev->idx, pbdev); 1050 } else { 1051 g_assert_not_reached(); 1052 } 1053 } 1054 1055 static void s390_pcihost_unplug(HotplugHandler *hotplug_dev, DeviceState *dev, 1056 Error **errp) 1057 { 1058 S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev); 1059 S390PCIBusDevice *pbdev = NULL; 1060 1061 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { 1062 PCIDevice *pci_dev = PCI_DEVICE(dev); 1063 PCIBus *bus; 1064 int32_t devfn; 1065 1066 pbdev = s390_pci_find_dev_by_pci(s, PCI_DEVICE(dev)); 1067 g_assert(pbdev); 1068 1069 s390_pci_generate_plug_event(HP_EVENT_STANDBY_TO_RESERVED, 1070 pbdev->fh, pbdev->fid); 1071 bus = pci_get_bus(pci_dev); 1072 devfn = pci_dev->devfn; 1073 qdev_unrealize(dev); 1074 1075 s390_pci_msix_free(pbdev); 1076 s390_pci_iommu_free(s, bus, devfn); 1077 pbdev->pdev = NULL; 1078 pbdev->state = ZPCI_FS_RESERVED; 1079 } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) { 1080 pbdev = S390_PCI_DEVICE(dev); 1081 pbdev->fid = 0; 1082 QTAILQ_REMOVE(&s->zpci_devs, pbdev, link); 1083 g_hash_table_remove(s->zpci_table, &pbdev->idx); 1084 if (pbdev->iommu->dma_limit) { 1085 s390_pci_end_dma_count(s, pbdev->iommu->dma_limit); 1086 } 1087 qdev_unrealize(dev); 1088 } 1089 } 1090 1091 static void s390_pcihost_unplug_request(HotplugHandler *hotplug_dev, 1092 DeviceState *dev, 1093 Error **errp) 1094 { 1095 S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev); 1096 S390PCIBusDevice *pbdev; 1097 1098 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) { 1099 error_setg(errp, "PCI bridge hot unplug currently not supported"); 1100 } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { 1101 /* 1102 * Redirect the unplug request to the zPCI device and remember that 1103 * we've checked the PCI device already (to prevent endless recursion). 1104 */ 1105 pbdev = s390_pci_find_dev_by_pci(s, PCI_DEVICE(dev)); 1106 g_assert(pbdev); 1107 pbdev->pci_unplug_request_processed = true; 1108 qdev_unplug(DEVICE(pbdev), errp); 1109 } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) { 1110 pbdev = S390_PCI_DEVICE(dev); 1111 1112 /* 1113 * If unplug was initially requested for the zPCI device, we 1114 * first have to redirect to the PCI device, which will in return 1115 * redirect back to us after performing its checks (if the request 1116 * is not blocked, e.g. because it's a PCI bridge). 1117 */ 1118 if (pbdev->pdev && !pbdev->pci_unplug_request_processed) { 1119 qdev_unplug(DEVICE(pbdev->pdev), errp); 1120 return; 1121 } 1122 pbdev->pci_unplug_request_processed = false; 1123 1124 switch (pbdev->state) { 1125 case ZPCI_FS_STANDBY: 1126 case ZPCI_FS_RESERVED: 1127 s390_pci_perform_unplug(pbdev); 1128 break; 1129 default: 1130 /* 1131 * Allow to send multiple requests, e.g. if the guest crashed 1132 * before releasing the device, we would not be able to send 1133 * another request to the same VM (e.g. fresh OS). 1134 */ 1135 pbdev->unplug_requested = true; 1136 s390_pci_generate_plug_event(HP_EVENT_DECONFIGURE_REQUEST, 1137 pbdev->fh, pbdev->fid); 1138 } 1139 } else { 1140 g_assert_not_reached(); 1141 } 1142 } 1143 1144 static void s390_pci_enumerate_bridge(PCIBus *bus, PCIDevice *pdev, 1145 void *opaque) 1146 { 1147 S390pciState *s = opaque; 1148 PCIBus *sec_bus = NULL; 1149 1150 if ((pci_default_read_config(pdev, PCI_HEADER_TYPE, 1) != 1151 PCI_HEADER_TYPE_BRIDGE)) { 1152 return; 1153 } 1154 1155 (s->bus_no)++; 1156 pci_default_write_config(pdev, PCI_PRIMARY_BUS, pci_dev_bus_num(pdev), 1); 1157 pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1); 1158 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1); 1159 1160 sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev)); 1161 if (!sec_bus) { 1162 return; 1163 } 1164 1165 /* Assign numbers to all child bridges. The last is the highest number. */ 1166 pci_for_each_device_under_bus(sec_bus, s390_pci_enumerate_bridge, s); 1167 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1); 1168 } 1169 1170 static void s390_pcihost_reset(DeviceState *dev) 1171 { 1172 S390pciState *s = S390_PCI_HOST_BRIDGE(dev); 1173 PCIBus *bus = s->parent_obj.bus; 1174 S390PCIBusDevice *pbdev, *next; 1175 1176 /* Process all pending unplug requests */ 1177 QTAILQ_FOREACH_SAFE(pbdev, &s->zpci_devs, link, next) { 1178 if (pbdev->unplug_requested) { 1179 if (pbdev->summary_ind) { 1180 pci_dereg_irqs(pbdev); 1181 } 1182 if (pbdev->iommu->enabled) { 1183 pci_dereg_ioat(pbdev->iommu); 1184 } 1185 pbdev->state = ZPCI_FS_STANDBY; 1186 s390_pci_perform_unplug(pbdev); 1187 } 1188 } 1189 1190 /* 1191 * When resetting a PCI bridge, the assigned numbers are set to 0. So 1192 * on every system reset, we also have to reassign numbers. 1193 */ 1194 s->bus_no = 0; 1195 pci_for_each_device_under_bus(bus, s390_pci_enumerate_bridge, s); 1196 } 1197 1198 static void s390_pcihost_class_init(ObjectClass *klass, void *data) 1199 { 1200 DeviceClass *dc = DEVICE_CLASS(klass); 1201 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); 1202 1203 dc->reset = s390_pcihost_reset; 1204 dc->realize = s390_pcihost_realize; 1205 dc->unrealize = s390_pcihost_unrealize; 1206 hc->pre_plug = s390_pcihost_pre_plug; 1207 hc->plug = s390_pcihost_plug; 1208 hc->unplug_request = s390_pcihost_unplug_request; 1209 hc->unplug = s390_pcihost_unplug; 1210 msi_nonbroken = true; 1211 } 1212 1213 static const TypeInfo s390_pcihost_info = { 1214 .name = TYPE_S390_PCI_HOST_BRIDGE, 1215 .parent = TYPE_PCI_HOST_BRIDGE, 1216 .instance_size = sizeof(S390pciState), 1217 .class_init = s390_pcihost_class_init, 1218 .interfaces = (InterfaceInfo[]) { 1219 { TYPE_HOTPLUG_HANDLER }, 1220 { } 1221 } 1222 }; 1223 1224 static const TypeInfo s390_pcibus_info = { 1225 .name = TYPE_S390_PCI_BUS, 1226 .parent = TYPE_BUS, 1227 .instance_size = sizeof(S390PCIBus), 1228 }; 1229 1230 static uint16_t s390_pci_generate_uid(S390pciState *s) 1231 { 1232 uint16_t uid = 0; 1233 1234 do { 1235 uid++; 1236 if (!s390_pci_find_dev_by_uid(s, uid)) { 1237 return uid; 1238 } 1239 } while (uid < ZPCI_MAX_UID); 1240 1241 return UID_UNDEFINED; 1242 } 1243 1244 static uint32_t s390_pci_generate_fid(S390pciState *s, Error **errp) 1245 { 1246 uint32_t fid = 0; 1247 1248 do { 1249 if (!s390_pci_find_dev_by_fid(s, fid)) { 1250 return fid; 1251 } 1252 } while (fid++ != ZPCI_MAX_FID); 1253 1254 error_setg(errp, "no free fid could be found"); 1255 return 0; 1256 } 1257 1258 static void s390_pci_device_realize(DeviceState *dev, Error **errp) 1259 { 1260 S390PCIBusDevice *zpci = S390_PCI_DEVICE(dev); 1261 S390pciState *s = s390_get_phb(); 1262 1263 if (!zpci->target) { 1264 error_setg(errp, "target must be defined"); 1265 return; 1266 } 1267 1268 if (s390_pci_find_dev_by_target(s, zpci->target)) { 1269 error_setg(errp, "target %s already has an associated zpci device", 1270 zpci->target); 1271 return; 1272 } 1273 1274 if (zpci->uid == UID_UNDEFINED) { 1275 zpci->uid = s390_pci_generate_uid(s); 1276 if (!zpci->uid) { 1277 error_setg(errp, "no free uid could be found"); 1278 return; 1279 } 1280 } else if (s390_pci_find_dev_by_uid(s, zpci->uid)) { 1281 error_setg(errp, "uid %u already in use", zpci->uid); 1282 return; 1283 } 1284 1285 if (!zpci->fid_defined) { 1286 Error *local_error = NULL; 1287 1288 zpci->fid = s390_pci_generate_fid(s, &local_error); 1289 if (local_error) { 1290 error_propagate(errp, local_error); 1291 return; 1292 } 1293 } else if (s390_pci_find_dev_by_fid(s, zpci->fid)) { 1294 error_setg(errp, "fid %u already in use", zpci->fid); 1295 return; 1296 } 1297 1298 zpci->state = ZPCI_FS_RESERVED; 1299 zpci->fmb.format = ZPCI_FMB_FORMAT; 1300 } 1301 1302 static void s390_pci_device_reset(DeviceState *dev) 1303 { 1304 S390PCIBusDevice *pbdev = S390_PCI_DEVICE(dev); 1305 1306 switch (pbdev->state) { 1307 case ZPCI_FS_RESERVED: 1308 return; 1309 case ZPCI_FS_STANDBY: 1310 break; 1311 default: 1312 pbdev->fh &= ~FH_MASK_ENABLE; 1313 pbdev->state = ZPCI_FS_DISABLED; 1314 break; 1315 } 1316 1317 if (pbdev->summary_ind) { 1318 pci_dereg_irqs(pbdev); 1319 } 1320 if (pbdev->iommu->enabled) { 1321 pci_dereg_ioat(pbdev->iommu); 1322 } 1323 1324 fmb_timer_free(pbdev); 1325 } 1326 1327 static void s390_pci_get_fid(Object *obj, Visitor *v, const char *name, 1328 void *opaque, Error **errp) 1329 { 1330 Property *prop = opaque; 1331 uint32_t *ptr = object_field_prop_ptr(obj, prop); 1332 1333 visit_type_uint32(v, name, ptr, errp); 1334 } 1335 1336 static void s390_pci_set_fid(Object *obj, Visitor *v, const char *name, 1337 void *opaque, Error **errp) 1338 { 1339 S390PCIBusDevice *zpci = S390_PCI_DEVICE(obj); 1340 Property *prop = opaque; 1341 uint32_t *ptr = object_field_prop_ptr(obj, prop); 1342 1343 if (!visit_type_uint32(v, name, ptr, errp)) { 1344 return; 1345 } 1346 zpci->fid_defined = true; 1347 } 1348 1349 static const PropertyInfo s390_pci_fid_propinfo = { 1350 .name = "zpci_fid", 1351 .get = s390_pci_get_fid, 1352 .set = s390_pci_set_fid, 1353 }; 1354 1355 #define DEFINE_PROP_S390_PCI_FID(_n, _s, _f) \ 1356 DEFINE_PROP(_n, _s, _f, s390_pci_fid_propinfo, uint32_t) 1357 1358 static Property s390_pci_device_properties[] = { 1359 DEFINE_PROP_UINT16("uid", S390PCIBusDevice, uid, UID_UNDEFINED), 1360 DEFINE_PROP_S390_PCI_FID("fid", S390PCIBusDevice, fid), 1361 DEFINE_PROP_STRING("target", S390PCIBusDevice, target), 1362 DEFINE_PROP_END_OF_LIST(), 1363 }; 1364 1365 static const VMStateDescription s390_pci_device_vmstate = { 1366 .name = TYPE_S390_PCI_DEVICE, 1367 /* 1368 * TODO: add state handling here, so migration works at least with 1369 * emulated pci devices on s390x 1370 */ 1371 .unmigratable = 1, 1372 }; 1373 1374 static void s390_pci_device_class_init(ObjectClass *klass, void *data) 1375 { 1376 DeviceClass *dc = DEVICE_CLASS(klass); 1377 1378 dc->desc = "zpci device"; 1379 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 1380 dc->reset = s390_pci_device_reset; 1381 dc->bus_type = TYPE_S390_PCI_BUS; 1382 dc->realize = s390_pci_device_realize; 1383 device_class_set_props(dc, s390_pci_device_properties); 1384 dc->vmsd = &s390_pci_device_vmstate; 1385 } 1386 1387 static const TypeInfo s390_pci_device_info = { 1388 .name = TYPE_S390_PCI_DEVICE, 1389 .parent = TYPE_DEVICE, 1390 .instance_size = sizeof(S390PCIBusDevice), 1391 .class_init = s390_pci_device_class_init, 1392 }; 1393 1394 static TypeInfo s390_pci_iommu_info = { 1395 .name = TYPE_S390_PCI_IOMMU, 1396 .parent = TYPE_OBJECT, 1397 .instance_size = sizeof(S390PCIIOMMU), 1398 }; 1399 1400 static void s390_iommu_memory_region_class_init(ObjectClass *klass, void *data) 1401 { 1402 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass); 1403 1404 imrc->translate = s390_translate_iommu; 1405 imrc->replay = s390_pci_iommu_replay; 1406 } 1407 1408 static const TypeInfo s390_iommu_memory_region_info = { 1409 .parent = TYPE_IOMMU_MEMORY_REGION, 1410 .name = TYPE_S390_IOMMU_MEMORY_REGION, 1411 .class_init = s390_iommu_memory_region_class_init, 1412 }; 1413 1414 static void s390_pci_register_types(void) 1415 { 1416 type_register_static(&s390_pcihost_info); 1417 type_register_static(&s390_pcibus_info); 1418 type_register_static(&s390_pci_device_info); 1419 type_register_static(&s390_pci_iommu_info); 1420 type_register_static(&s390_iommu_memory_region_info); 1421 } 1422 1423 type_init(s390_pci_register_types) 1424