hw/s390x/s390-pci-bus.c

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