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 "qemu-common.h"
  18 #include "cpu.h"
  19 #include "s390-pci-bus.h"
  20 #include "s390-pci-inst.h"
  21 #include "hw/pci/pci_bus.h"
  22 #include "hw/pci/msi.h"
  23 #include "qemu/error-report.h"
  24
  25 /* #define DEBUG_S390PCI_BUS */
  26 #ifdef DEBUG_S390PCI_BUS
  27 #define DPRINTF(fmt, ...) \
  28     do { fprintf(stderr, "S390pci-bus: " fmt, ## __VA_ARGS__); } while (0)
  29 #else
  30 #define DPRINTF(fmt, ...) \
  31     do { } while (0)
  32 #endif
  33
  34 static S390pciState *s390_get_phb(void)
  35 {
  36     static S390pciState *phb;
  37
  38     if (!phb) {
  39         phb = S390_PCI_HOST_BRIDGE(
  40             object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
  41         assert(phb != NULL);
  42     }
  43
  44     return phb;
  45 }
  46
  47 int chsc_sei_nt2_get_event(void *res)
  48 {
  49     ChscSeiNt2Res *nt2_res = (ChscSeiNt2Res *)res;
  50     PciCcdfAvail *accdf;
  51     PciCcdfErr *eccdf;
  52     int rc = 1;
  53     SeiContainer *sei_cont;
  54     S390pciState *s = s390_get_phb();
  55
  56     sei_cont = QTAILQ_FIRST(&s->pending_sei);
  57     if (sei_cont) {
  58         QTAILQ_REMOVE(&s->pending_sei, sei_cont, link);
  59         nt2_res->nt = 2;
  60         nt2_res->cc = sei_cont->cc;
  61         nt2_res->length = cpu_to_be16(sizeof(ChscSeiNt2Res));
  62         switch (sei_cont->cc) {
  63         case 1: /* error event */
  64             eccdf = (PciCcdfErr *)nt2_res->ccdf;
  65             eccdf->fid = cpu_to_be32(sei_cont->fid);
  66             eccdf->fh = cpu_to_be32(sei_cont->fh);
  67             eccdf->e = cpu_to_be32(sei_cont->e);
  68             eccdf->faddr = cpu_to_be64(sei_cont->faddr);
  69             eccdf->pec = cpu_to_be16(sei_cont->pec);
  70             break;
  71         case 2: /* availability event */
  72             accdf = (PciCcdfAvail *)nt2_res->ccdf;
  73             accdf->fid = cpu_to_be32(sei_cont->fid);
  74             accdf->fh = cpu_to_be32(sei_cont->fh);
  75             accdf->pec = cpu_to_be16(sei_cont->pec);
  76             break;
  77         default:
  78             abort();
  79         }
  80         g_free(sei_cont);
  81         rc = 0;
  82     }
  83
  84     return rc;
  85 }
  86
  87 int chsc_sei_nt2_have_event(void)
  88 {
  89     S390pciState *s = s390_get_phb();
  90
  91     return !QTAILQ_EMPTY(&s->pending_sei);
  92 }
  93
  94 S390PCIBusDevice *s390_pci_find_next_avail_dev(S390PCIBusDevice *pbdev)
  95 {
  96     int idx = 0;
  97     S390PCIBusDevice *dev = NULL;
  98     S390pciState *s = s390_get_phb();
  99
 100     if (pbdev) {
 101         idx = (pbdev->fh & FH_MASK_INDEX) + 1;
 102     }
 103
 104     for (; idx < PCI_SLOT_MAX; idx++) {
 105         dev = s->pbdev[idx];
 106         if (dev && dev->state != ZPCI_FS_RESERVED) {
 107             return dev;
 108         }
 109     }
 110
 111     return NULL;
 112 }
 113
 114 S390PCIBusDevice *s390_pci_find_dev_by_fid(uint32_t fid)
 115 {
 116     S390PCIBusDevice *pbdev;
 117     int i;
 118     S390pciState *s = s390_get_phb();
 119
 120     for (i = 0; i < PCI_SLOT_MAX; i++) {
 121         pbdev = s->pbdev[i];
 122         if (pbdev && pbdev->fid == fid) {
 123             return pbdev;
 124         }
 125     }
 126
 127     return NULL;
 128 }
 129
 130 void s390_pci_sclp_configure(SCCB *sccb)
 131 {
 132     PciCfgSccb *psccb = (PciCfgSccb *)sccb;
 133     S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(be32_to_cpu(psccb->aid));
 134     uint16_t rc;
 135
 136     if (be16_to_cpu(sccb->h.length) < 16) {
 137         rc = SCLP_RC_INSUFFICIENT_SCCB_LENGTH;
 138         goto out;
 139     }
 140
 141     if (!pbdev) {
 142         DPRINTF("sclp config no dev found\n");
 143         rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED;
 144         goto out;
 145     }
 146
 147     switch (pbdev->state) {
 148     case ZPCI_FS_RESERVED:
 149         rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE;
 150         break;
 151     case ZPCI_FS_STANDBY:
 152         pbdev->state = ZPCI_FS_DISABLED;
 153         rc = SCLP_RC_NORMAL_COMPLETION;
 154         break;
 155     default:
 156         rc = SCLP_RC_NO_ACTION_REQUIRED;
 157     }
 158 out:
 159     psccb->header.response_code = cpu_to_be16(rc);
 160 }
 161
 162 void s390_pci_sclp_deconfigure(SCCB *sccb)
 163 {
 164     PciCfgSccb *psccb = (PciCfgSccb *)sccb;
 165     S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(be32_to_cpu(psccb->aid));
 166     uint16_t rc;
 167
 168     if (be16_to_cpu(sccb->h.length) < 16) {
 169         rc = SCLP_RC_INSUFFICIENT_SCCB_LENGTH;
 170         goto out;
 171     }
 172
 173     if (!pbdev) {
 174         DPRINTF("sclp deconfig no dev found\n");
 175         rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED;
 176         goto out;
 177     }
 178
 179     switch (pbdev->state) {
 180     case ZPCI_FS_RESERVED:
 181         rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE;
 182         break;
 183     case ZPCI_FS_STANDBY:
 184         rc = SCLP_RC_NO_ACTION_REQUIRED;
 185         break;
 186     default:
 187         if (pbdev->summary_ind) {
 188             pci_dereg_irqs(pbdev);
 189         }
 190         if (pbdev->iommu_enabled) {
 191             pci_dereg_ioat(pbdev);
 192         }
 193         pbdev->state = ZPCI_FS_STANDBY;
 194         rc = SCLP_RC_NORMAL_COMPLETION;
 195
 196         if (pbdev->release_timer) {
 197             qdev_unplug(DEVICE(pbdev->pdev), NULL);
 198         }
 199     }
 200 out:
 201     psccb->header.response_code = cpu_to_be16(rc);
 202 }
 203
 204 static S390PCIBusDevice *s390_pci_find_dev_by_uid(uint16_t uid)
 205 {
 206     int i;
 207     S390PCIBusDevice *pbdev;
 208     S390pciState *s = s390_get_phb();
 209
 210     for (i = 0; i < PCI_SLOT_MAX; i++) {
 211         pbdev = s->pbdev[i];
 212         if (!pbdev) {
 213             continue;
 214         }
 215
 216         if (pbdev->uid == uid) {
 217             return pbdev;
 218         }
 219     }
 220
 221     return NULL;
 222 }
 223
 224 static S390PCIBusDevice *s390_pci_find_dev_by_target(const char *target)
 225 {
 226     int i;
 227     S390PCIBusDevice *pbdev;
 228     S390pciState *s = s390_get_phb();
 229
 230     if (!target) {
 231         return NULL;
 232     }
 233
 234     for (i = 0; i < PCI_SLOT_MAX; i++) {
 235         pbdev = s->pbdev[i];
 236         if (!pbdev) {
 237             continue;
 238         }
 239
 240         if (!strcmp(pbdev->target, target)) {
 241             return pbdev;
 242         }
 243     }
 244
 245     return NULL;
 246 }
 247
 248 S390PCIBusDevice *s390_pci_find_dev_by_idx(uint32_t idx)
 249 {
 250     S390pciState *s = s390_get_phb();
 251
 252     return s->pbdev[idx & FH_MASK_INDEX];
 253 }
 254
 255 S390PCIBusDevice *s390_pci_find_dev_by_fh(uint32_t fh)
 256 {
 257     S390pciState *s = s390_get_phb();
 258     S390PCIBusDevice *pbdev;
 259
 260     pbdev = s->pbdev[fh & FH_MASK_INDEX];
 261     if (pbdev && pbdev->fh == fh) {
 262         return pbdev;
 263     }
 264
 265     return NULL;
 266 }
 267
 268 static void s390_pci_generate_event(uint8_t cc, uint16_t pec, uint32_t fh,
 269                                     uint32_t fid, uint64_t faddr, uint32_t e)
 270 {
 271     SeiContainer *sei_cont;
 272     S390pciState *s = s390_get_phb();
 273
 274     sei_cont = g_malloc0(sizeof(SeiContainer));
 275     sei_cont->fh = fh;
 276     sei_cont->fid = fid;
 277     sei_cont->cc = cc;
 278     sei_cont->pec = pec;
 279     sei_cont->faddr = faddr;
 280     sei_cont->e = e;
 281
 282     QTAILQ_INSERT_TAIL(&s->pending_sei, sei_cont, link);
 283     css_generate_css_crws(0);
 284 }
 285
 286 static void s390_pci_generate_plug_event(uint16_t pec, uint32_t fh,
 287                                          uint32_t fid)
 288 {
 289     s390_pci_generate_event(2, pec, fh, fid, 0, 0);
 290 }
 291
 292 void s390_pci_generate_error_event(uint16_t pec, uint32_t fh, uint32_t fid,
 293                                    uint64_t faddr, uint32_t e)
 294 {
 295     s390_pci_generate_event(1, pec, fh, fid, faddr, e);
 296 }
 297
 298 static void s390_pci_set_irq(void *opaque, int irq, int level)
 299 {
 300     /* nothing to do */
 301 }
 302
 303 static int s390_pci_map_irq(PCIDevice *pci_dev, int irq_num)
 304 {
 305     /* nothing to do */
 306     return 0;
 307 }
 308
 309 static uint64_t s390_pci_get_table_origin(uint64_t iota)
 310 {
 311     return iota & ~ZPCI_IOTA_RTTO_FLAG;
 312 }
 313
 314 static unsigned int calc_rtx(dma_addr_t ptr)
 315 {
 316     return ((unsigned long) ptr >> ZPCI_RT_SHIFT) & ZPCI_INDEX_MASK;
 317 }
 318
 319 static unsigned int calc_sx(dma_addr_t ptr)
 320 {
 321     return ((unsigned long) ptr >> ZPCI_ST_SHIFT) & ZPCI_INDEX_MASK;
 322 }
 323
 324 static unsigned int calc_px(dma_addr_t ptr)
 325 {
 326     return ((unsigned long) ptr >> PAGE_SHIFT) & ZPCI_PT_MASK;
 327 }
 328
 329 static uint64_t get_rt_sto(uint64_t entry)
 330 {
 331     return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_RTX)
 332                 ? (entry & ZPCI_RTE_ADDR_MASK)
 333                 : 0;
 334 }
 335
 336 static uint64_t get_st_pto(uint64_t entry)
 337 {
 338     return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_SX)
 339             ? (entry & ZPCI_STE_ADDR_MASK)
 340             : 0;
 341 }
 342
 343 static uint64_t s390_guest_io_table_walk(uint64_t guest_iota,
 344                                   uint64_t guest_dma_address)
 345 {
 346     uint64_t sto_a, pto_a, px_a;
 347     uint64_t sto, pto, pte;
 348     uint32_t rtx, sx, px;
 349
 350     rtx = calc_rtx(guest_dma_address);
 351     sx = calc_sx(guest_dma_address);
 352     px = calc_px(guest_dma_address);
 353
 354     sto_a = guest_iota + rtx * sizeof(uint64_t);
 355     sto = address_space_ldq(&address_space_memory, sto_a,
 356                             MEMTXATTRS_UNSPECIFIED, NULL);
 357     sto = get_rt_sto(sto);
 358     if (!sto) {
 359         pte = 0;
 360         goto out;
 361     }
 362
 363     pto_a = sto + sx * sizeof(uint64_t);
 364     pto = address_space_ldq(&address_space_memory, pto_a,
 365                             MEMTXATTRS_UNSPECIFIED, NULL);
 366     pto = get_st_pto(pto);
 367     if (!pto) {
 368         pte = 0;
 369         goto out;
 370     }
 371
 372     px_a = pto + px * sizeof(uint64_t);
 373     pte = address_space_ldq(&address_space_memory, px_a,
 374                             MEMTXATTRS_UNSPECIFIED, NULL);
 375
 376 out:
 377     return pte;
 378 }
 379
 380 static IOMMUTLBEntry s390_translate_iommu(MemoryRegion *iommu, hwaddr addr,
 381                                           bool is_write)
 382 {
 383     uint64_t pte;
 384     uint32_t flags;
 385     S390PCIBusDevice *pbdev = container_of(iommu, S390PCIBusDevice, iommu_mr);
 386     IOMMUTLBEntry ret = {
 387         .target_as = &address_space_memory,
 388         .iova = 0,
 389         .translated_addr = 0,
 390         .addr_mask = ~(hwaddr)0,
 391         .perm = IOMMU_NONE,
 392     };
 393
 394     switch (pbdev->state) {
 395     case ZPCI_FS_ENABLED:
 396     case ZPCI_FS_BLOCKED:
 397         if (!pbdev->iommu_enabled) {
 398             return ret;
 399         }
 400         break;
 401     default:
 402         return ret;
 403     }
 404
 405     DPRINTF("iommu trans addr 0x%" PRIx64 "\n", addr);
 406
 407     if (addr < pbdev->pba || addr > pbdev->pal) {
 408         return ret;
 409     }
 410
 411     pte = s390_guest_io_table_walk(s390_pci_get_table_origin(pbdev->g_iota),
 412                                    addr);
 413     if (!pte) {
 414         return ret;
 415     }
 416
 417     flags = pte & ZPCI_PTE_FLAG_MASK;
 418     ret.iova = addr;
 419     ret.translated_addr = pte & ZPCI_PTE_ADDR_MASK;
 420     ret.addr_mask = 0xfff;
 421
 422     if (flags & ZPCI_PTE_INVALID) {
 423         ret.perm = IOMMU_NONE;
 424     } else {
 425         ret.perm = IOMMU_RW;
 426     }
 427
 428     return ret;
 429 }
 430
 431 static const MemoryRegionIOMMUOps s390_iommu_ops = {
 432     .translate = s390_translate_iommu,
 433 };
 434
 435 static AddressSpace *s390_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn)
 436 {
 437     S390pciState *s = opaque;
 438
 439     return &s->iommu[PCI_SLOT(devfn)]->as;
 440 }
 441
 442 static uint8_t set_ind_atomic(uint64_t ind_loc, uint8_t to_be_set)
 443 {
 444     uint8_t ind_old, ind_new;
 445     hwaddr len = 1;
 446     uint8_t *ind_addr;
 447
 448     ind_addr = cpu_physical_memory_map(ind_loc, &len, 1);
 449     if (!ind_addr) {
 450         s390_pci_generate_error_event(ERR_EVENT_AIRERR, 0, 0, 0, 0);
 451         return -1;
 452     }
 453     do {
 454         ind_old = *ind_addr;
 455         ind_new = ind_old | to_be_set;
 456     } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old);
 457     cpu_physical_memory_unmap(ind_addr, len, 1, len);
 458
 459     return ind_old;
 460 }
 461
 462 static void s390_msi_ctrl_write(void *opaque, hwaddr addr, uint64_t data,
 463                                 unsigned int size)
 464 {
 465     S390PCIBusDevice *pbdev = opaque;
 466     uint32_t io_int_word;
 467     uint32_t idx = data >> ZPCI_MSI_VEC_BITS;
 468     uint32_t vec = data & ZPCI_MSI_VEC_MASK;
 469     uint64_t ind_bit;
 470     uint32_t sum_bit;
 471     uint32_t e = 0;
 472
 473     DPRINTF("write_msix data 0x%" PRIx64 " idx %d vec 0x%x\n", data, idx, vec);
 474
 475     if (!pbdev) {
 476         e |= (vec << ERR_EVENT_MVN_OFFSET);
 477         s390_pci_generate_error_event(ERR_EVENT_NOMSI, idx, 0, addr, e);
 478         return;
 479     }
 480
 481     if (pbdev->state != ZPCI_FS_ENABLED) {
 482         return;
 483     }
 484
 485     ind_bit = pbdev->routes.adapter.ind_offset;
 486     sum_bit = pbdev->routes.adapter.summary_offset;
 487
 488     set_ind_atomic(pbdev->routes.adapter.ind_addr + (ind_bit + vec) / 8,
 489                    0x80 >> ((ind_bit + vec) % 8));
 490     if (!set_ind_atomic(pbdev->routes.adapter.summary_addr + sum_bit / 8,
 491                                        0x80 >> (sum_bit % 8))) {
 492         io_int_word = (pbdev->isc << 27) | IO_INT_WORD_AI;
 493         s390_io_interrupt(0, 0, 0, io_int_word);
 494     }
 495 }
 496
 497 static uint64_t s390_msi_ctrl_read(void *opaque, hwaddr addr, unsigned size)
 498 {
 499     return 0xffffffff;
 500 }
 501
 502 static const MemoryRegionOps s390_msi_ctrl_ops = {
 503     .write = s390_msi_ctrl_write,
 504     .read = s390_msi_ctrl_read,
 505     .endianness = DEVICE_LITTLE_ENDIAN,
 506 };
 507
 508 void s390_pci_iommu_enable(S390PCIBusDevice *pbdev)
 509 {
 510     memory_region_init_iommu(&pbdev->iommu_mr, OBJECT(&pbdev->iommu->mr),
 511                              &s390_iommu_ops, "iommu-s390", pbdev->pal + 1);
 512     memory_region_add_subregion(&pbdev->iommu->mr, 0, &pbdev->iommu_mr);
 513     pbdev->iommu_enabled = true;
 514 }
 515
 516 void s390_pci_iommu_disable(S390PCIBusDevice *pbdev)
 517 {
 518     memory_region_del_subregion(&pbdev->iommu->mr, &pbdev->iommu_mr);
 519     object_unparent(OBJECT(&pbdev->iommu_mr));
 520     pbdev->iommu_enabled = false;
 521 }
 522
 523 static void s390_pcihost_init_as(S390pciState *s)
 524 {
 525     int i;
 526     S390PCIIOMMU *iommu;
 527
 528     for (i = 0; i < PCI_SLOT_MAX; i++) {
 529         iommu = g_malloc0(sizeof(S390PCIIOMMU));
 530         memory_region_init(&iommu->mr, OBJECT(s),
 531                            "iommu-root-s390", UINT64_MAX);
 532         address_space_init(&iommu->as, &iommu->mr, "iommu-pci");
 533
 534         s->iommu[i] = iommu;
 535     }
 536 }
 537
 538 static int s390_pcihost_init(SysBusDevice *dev)
 539 {
 540     PCIBus *b;
 541     BusState *bus;
 542     PCIHostState *phb = PCI_HOST_BRIDGE(dev);
 543     S390pciState *s = S390_PCI_HOST_BRIDGE(dev);
 544
 545     DPRINTF("host_init\n");
 546
 547     b = pci_register_bus(DEVICE(dev), NULL,
 548                          s390_pci_set_irq, s390_pci_map_irq, NULL,
 549                          get_system_memory(), get_system_io(), 0, 64,
 550                          TYPE_PCI_BUS);
 551     s390_pcihost_init_as(s);
 552     pci_setup_iommu(b, s390_pci_dma_iommu, s);
 553
 554     bus = BUS(b);
 555     qbus_set_hotplug_handler(bus, DEVICE(dev), NULL);
 556     phb->bus = b;
 557
 558     s->bus = S390_PCI_BUS(qbus_create(TYPE_S390_PCI_BUS, DEVICE(s), NULL));
 559     qbus_set_hotplug_handler(BUS(s->bus), DEVICE(s), NULL);
 560
 561     QTAILQ_INIT(&s->pending_sei);
 562     return 0;
 563 }
 564
 565 static int s390_pci_setup_msix(S390PCIBusDevice *pbdev)
 566 {
 567     uint8_t pos;
 568     uint16_t ctrl;
 569     uint32_t table, pba;
 570
 571     pos = pci_find_capability(pbdev->pdev, PCI_CAP_ID_MSIX);
 572     if (!pos) {
 573         pbdev->msix.available = false;
 574         return 0;
 575     }
 576
 577     ctrl = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_FLAGS,
 578              pci_config_size(pbdev->pdev), sizeof(ctrl));
 579     table = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_TABLE,
 580              pci_config_size(pbdev->pdev), sizeof(table));
 581     pba = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_PBA,
 582              pci_config_size(pbdev->pdev), sizeof(pba));
 583
 584     pbdev->msix.table_bar = table & PCI_MSIX_FLAGS_BIRMASK;
 585     pbdev->msix.table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK;
 586     pbdev->msix.pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK;
 587     pbdev->msix.pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK;
 588     pbdev->msix.entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1;
 589     pbdev->msix.available = true;
 590     return 0;
 591 }
 592
 593 static void s390_pci_msix_init(S390PCIBusDevice *pbdev)
 594 {
 595     char *name;
 596
 597     name = g_strdup_printf("msix-s390-%04x", pbdev->uid);
 598
 599     memory_region_init_io(&pbdev->msix_notify_mr, OBJECT(pbdev),
 600                           &s390_msi_ctrl_ops, pbdev, name, PAGE_SIZE);
 601     memory_region_add_subregion(&pbdev->iommu->mr, ZPCI_MSI_ADDR,
 602                                 &pbdev->msix_notify_mr);
 603
 604     g_free(name);
 605 }
 606
 607 static void s390_pci_msix_free(S390PCIBusDevice *pbdev)
 608 {
 609     memory_region_del_subregion(&pbdev->iommu->mr, &pbdev->msix_notify_mr);
 610     object_unparent(OBJECT(&pbdev->msix_notify_mr));
 611 }
 612
 613 static S390PCIBusDevice *s390_pci_device_new(const char *target)
 614 {
 615     DeviceState *dev = NULL;
 616     S390pciState *s = s390_get_phb();
 617
 618     dev = qdev_try_create(BUS(s->bus), TYPE_S390_PCI_DEVICE);
 619     if (!dev) {
 620         return NULL;
 621     }
 622
 623     qdev_prop_set_string(dev, "target", target);
 624     qdev_init_nofail(dev);
 625
 626     return S390_PCI_DEVICE(dev);
 627 }
 628
 629 static void s390_pcihost_hot_plug(HotplugHandler *hotplug_dev,
 630                                   DeviceState *dev, Error **errp)
 631 {
 632     PCIDevice *pdev = NULL;
 633     S390PCIBusDevice *pbdev = NULL;
 634     S390pciState *s = s390_get_phb();
 635
 636     if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 637         pdev = PCI_DEVICE(dev);
 638
 639         if (!dev->id) {
 640             /* In the case the PCI device does not define an id */
 641             /* we generate one based on the PCI address         */
 642             dev->id = g_strdup_printf("auto_%02x:%02x.%01x",
 643                                       pci_bus_num(pdev->bus),
 644                                       PCI_SLOT(pdev->devfn),
 645                                       PCI_FUNC(pdev->devfn));
 646         }
 647
 648         pbdev = s390_pci_find_dev_by_target(dev->id);
 649         if (!pbdev) {
 650             pbdev = s390_pci_device_new(dev->id);
 651             if (!pbdev) {
 652                 error_setg(errp, "create zpci device failed");
 653                 return;
 654             }
 655         }
 656
 657         if (object_dynamic_cast(OBJECT(dev), "vfio-pci")) {
 658             pbdev->fh |= FH_SHM_VFIO;
 659         } else {
 660             pbdev->fh |= FH_SHM_EMUL;
 661         }
 662
 663         pbdev->pdev = pdev;
 664         pbdev->iommu = s->iommu[PCI_SLOT(pdev->devfn)];
 665         pbdev->state = ZPCI_FS_STANDBY;
 666
 667         s390_pci_msix_init(pbdev);
 668         s390_pci_setup_msix(pbdev);
 669
 670         if (dev->hotplugged) {
 671             s390_pci_generate_plug_event(HP_EVENT_RESERVED_TO_STANDBY,
 672                                          pbdev->fh, pbdev->fid);
 673         }
 674     } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) {
 675         int idx;
 676
 677         pbdev = S390_PCI_DEVICE(dev);
 678         for (idx = 0; idx < PCI_SLOT_MAX; idx++) {
 679             if (!s->pbdev[idx]) {
 680                 s->pbdev[idx] = pbdev;
 681                 pbdev->fh = idx;
 682                 return;
 683             }
 684         }
 685
 686         error_setg(errp, "no slot for plugging zpci device");
 687     }
 688 }
 689
 690 static void s390_pcihost_timer_cb(void *opaque)
 691 {
 692     S390PCIBusDevice *pbdev = opaque;
 693
 694     if (pbdev->summary_ind) {
 695         pci_dereg_irqs(pbdev);
 696     }
 697     if (pbdev->iommu_enabled) {
 698         pci_dereg_ioat(pbdev);
 699     }
 700
 701     pbdev->state = ZPCI_FS_STANDBY;
 702     s390_pci_generate_plug_event(HP_EVENT_CONFIGURED_TO_STBRES,
 703                                  pbdev->fh, pbdev->fid);
 704     qdev_unplug(DEVICE(pbdev), NULL);
 705 }
 706
 707 static void s390_pcihost_hot_unplug(HotplugHandler *hotplug_dev,
 708                                     DeviceState *dev, Error **errp)
 709 {
 710     int i;
 711     PCIDevice *pci_dev = NULL;
 712     S390PCIBusDevice *pbdev = NULL;
 713     S390pciState *s = s390_get_phb();
 714
 715     if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 716         pci_dev = PCI_DEVICE(dev);
 717
 718         for (i = 0 ; i < PCI_SLOT_MAX; i++) {
 719             if (s->pbdev[i] && s->pbdev[i]->pdev == pci_dev) {
 720                 pbdev = s->pbdev[i];
 721                 break;
 722             }
 723         }
 724         assert(pbdev != NULL);
 725     } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) {
 726         pbdev = S390_PCI_DEVICE(dev);
 727         pci_dev = pbdev->pdev;
 728     }
 729
 730     switch (pbdev->state) {
 731     case ZPCI_FS_RESERVED:
 732         goto out;
 733     case ZPCI_FS_STANDBY:
 734         break;
 735     default:
 736         s390_pci_generate_plug_event(HP_EVENT_DECONFIGURE_REQUEST,
 737                                      pbdev->fh, pbdev->fid);
 738         pbdev->release_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
 739                                             s390_pcihost_timer_cb,
 740                                             pbdev);
 741         timer_mod(pbdev->release_timer,
 742                   qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + HOT_UNPLUG_TIMEOUT);
 743         return;
 744     }
 745
 746     if (pbdev->release_timer && timer_pending(pbdev->release_timer)) {
 747         timer_del(pbdev->release_timer);
 748         timer_free(pbdev->release_timer);
 749         pbdev->release_timer = NULL;
 750     }
 751
 752     s390_pci_generate_plug_event(HP_EVENT_STANDBY_TO_RESERVED,
 753                                  pbdev->fh, pbdev->fid);
 754     object_unparent(OBJECT(pci_dev));
 755     s390_pci_msix_free(pbdev);
 756     pbdev->pdev = NULL;
 757     pbdev->state = ZPCI_FS_RESERVED;
 758 out:
 759     pbdev->fid = 0;
 760     s->pbdev[pbdev->fh & FH_MASK_INDEX] = NULL;
 761     object_unparent(OBJECT(pbdev));
 762 }
 763
 764 static void s390_pcihost_class_init(ObjectClass *klass, void *data)
 765 {
 766     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 767     DeviceClass *dc = DEVICE_CLASS(klass);
 768     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
 769
 770     dc->cannot_instantiate_with_device_add_yet = true;
 771     k->init = s390_pcihost_init;
 772     hc->plug = s390_pcihost_hot_plug;
 773     hc->unplug = s390_pcihost_hot_unplug;
 774     msi_nonbroken = true;
 775 }
 776
 777 static const TypeInfo s390_pcihost_info = {
 778     .name          = TYPE_S390_PCI_HOST_BRIDGE,
 779     .parent        = TYPE_PCI_HOST_BRIDGE,
 780     .instance_size = sizeof(S390pciState),
 781     .class_init    = s390_pcihost_class_init,
 782     .interfaces = (InterfaceInfo[]) {
 783         { TYPE_HOTPLUG_HANDLER },
 784         { }
 785     }
 786 };
 787
 788 static const TypeInfo s390_pcibus_info = {
 789     .name = TYPE_S390_PCI_BUS,
 790     .parent = TYPE_BUS,
 791     .instance_size = sizeof(S390PCIBus),
 792 };
 793
 794 static uint16_t s390_pci_generate_uid(void)
 795 {
 796     uint16_t uid = 0;
 797
 798     do {
 799         uid++;
 800         if (!s390_pci_find_dev_by_uid(uid)) {
 801             return uid;
 802         }
 803     } while (uid < ZPCI_MAX_UID);
 804
 805     return UID_UNDEFINED;
 806 }
 807
 808 static uint32_t s390_pci_generate_fid(Error **errp)
 809 {
 810     uint32_t fid = 0;
 811
 812     while (fid <= ZPCI_MAX_FID) {
 813         if (!s390_pci_find_dev_by_fid(fid)) {
 814             return fid;
 815         }
 816
 817         if (fid == ZPCI_MAX_FID) {
 818             break;
 819         }
 820
 821         fid++;
 822     }
 823
 824     error_setg(errp, "no free fid could be found");
 825     return 0;
 826 }
 827
 828 static void s390_pci_device_realize(DeviceState *dev, Error **errp)
 829 {
 830     S390PCIBusDevice *zpci = S390_PCI_DEVICE(dev);
 831
 832     if (!zpci->target) {
 833         error_setg(errp, "target must be defined");
 834         return;
 835     }
 836
 837     if (s390_pci_find_dev_by_target(zpci->target)) {
 838         error_setg(errp, "target %s already has an associated zpci device",
 839                    zpci->target);
 840         return;
 841     }
 842
 843     if (zpci->uid == UID_UNDEFINED) {
 844         zpci->uid = s390_pci_generate_uid();
 845         if (!zpci->uid) {
 846             error_setg(errp, "no free uid could be found");
 847             return;
 848         }
 849     } else if (s390_pci_find_dev_by_uid(zpci->uid)) {
 850         error_setg(errp, "uid %u already in use", zpci->uid);
 851         return;
 852     }
 853
 854     if (!zpci->fid_defined) {
 855         Error *local_error = NULL;
 856
 857         zpci->fid = s390_pci_generate_fid(&local_error);
 858         if (local_error) {
 859             error_propagate(errp, local_error);
 860             return;
 861         }
 862     } else if (s390_pci_find_dev_by_fid(zpci->fid)) {
 863         error_setg(errp, "fid %u already in use", zpci->fid);
 864         return;
 865     }
 866
 867     zpci->state = ZPCI_FS_RESERVED;
 868 }
 869
 870 static void s390_pci_device_reset(DeviceState *dev)
 871 {
 872     S390PCIBusDevice *pbdev = S390_PCI_DEVICE(dev);
 873
 874     switch (pbdev->state) {
 875     case ZPCI_FS_RESERVED:
 876         return;
 877     case ZPCI_FS_STANDBY:
 878         break;
 879     default:
 880         pbdev->fh &= ~FH_MASK_ENABLE;
 881         pbdev->state = ZPCI_FS_DISABLED;
 882         break;
 883     }
 884
 885     if (pbdev->summary_ind) {
 886         pci_dereg_irqs(pbdev);
 887     }
 888     if (pbdev->iommu_enabled) {
 889         pci_dereg_ioat(pbdev);
 890     }
 891
 892     pbdev->fmb_addr = 0;
 893 }
 894
 895 static void s390_pci_get_fid(Object *obj, Visitor *v, const char *name,
 896                          void *opaque, Error **errp)
 897 {
 898     Property *prop = opaque;
 899     uint32_t *ptr = qdev_get_prop_ptr(DEVICE(obj), prop);
 900
 901     visit_type_uint32(v, name, ptr, errp);
 902 }
 903
 904 static void s390_pci_set_fid(Object *obj, Visitor *v, const char *name,
 905                          void *opaque, Error **errp)
 906 {
 907     DeviceState *dev = DEVICE(obj);
 908     S390PCIBusDevice *zpci = S390_PCI_DEVICE(obj);
 909     Property *prop = opaque;
 910     uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
 911
 912     if (dev->realized) {
 913         qdev_prop_set_after_realize(dev, name, errp);
 914         return;
 915     }
 916
 917     visit_type_uint32(v, name, ptr, errp);
 918     zpci->fid_defined = true;
 919 }
 920
 921 static PropertyInfo s390_pci_fid_propinfo = {
 922     .name = "zpci_fid",
 923     .get = s390_pci_get_fid,
 924     .set = s390_pci_set_fid,
 925 };
 926
 927 #define DEFINE_PROP_S390_PCI_FID(_n, _s, _f) \
 928     DEFINE_PROP(_n, _s, _f, s390_pci_fid_propinfo, uint32_t)
 929
 930 static Property s390_pci_device_properties[] = {
 931     DEFINE_PROP_UINT16("uid", S390PCIBusDevice, uid, UID_UNDEFINED),
 932     DEFINE_PROP_S390_PCI_FID("fid", S390PCIBusDevice, fid),
 933     DEFINE_PROP_STRING("target", S390PCIBusDevice, target),
 934     DEFINE_PROP_END_OF_LIST(),
 935 };
 936
 937 static void s390_pci_device_class_init(ObjectClass *klass, void *data)
 938 {
 939     DeviceClass *dc = DEVICE_CLASS(klass);
 940
 941     dc->desc = "zpci device";
 942     dc->reset = s390_pci_device_reset;
 943     dc->bus_type = TYPE_S390_PCI_BUS;
 944     dc->realize = s390_pci_device_realize;
 945     dc->props = s390_pci_device_properties;
 946 }
 947
 948 static const TypeInfo s390_pci_device_info = {
 949     .name = TYPE_S390_PCI_DEVICE,
 950     .parent = TYPE_DEVICE,
 951     .instance_size = sizeof(S390PCIBusDevice),
 952     .class_init = s390_pci_device_class_init,
 953 };
 954
 955 static void s390_pci_register_types(void)
 956 {
 957     type_register_static(&s390_pcihost_info);
 958     type_register_static(&s390_pcibus_info);
 959     type_register_static(&s390_pci_device_info);
 960 }
 961
 962 type_init(s390_pci_register_types)