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 out:
 197     psccb->header.response_code = cpu_to_be16(rc);
 198 }
 199
 200 static S390PCIBusDevice *s390_pci_find_dev_by_uid(uint16_t uid)
 201 {
 202     int i;
 203     S390PCIBusDevice *pbdev;
 204     S390pciState *s = s390_get_phb();
 205
 206     for (i = 0; i < PCI_SLOT_MAX; i++) {
 207         pbdev = s->pbdev[i];
 208         if (!pbdev) {
 209             continue;
 210         }
 211
 212         if (pbdev->uid == uid) {
 213             return pbdev;
 214         }
 215     }
 216
 217     return NULL;
 218 }
 219
 220 static S390PCIBusDevice *s390_pci_find_dev_by_target(const char *target)
 221 {
 222     int i;
 223     S390PCIBusDevice *pbdev;
 224     S390pciState *s = s390_get_phb();
 225
 226     if (!target) {
 227         return NULL;
 228     }
 229
 230     for (i = 0; i < PCI_SLOT_MAX; i++) {
 231         pbdev = s->pbdev[i];
 232         if (!pbdev) {
 233             continue;
 234         }
 235
 236         if (!strcmp(pbdev->target, target)) {
 237             return pbdev;
 238         }
 239     }
 240
 241     return NULL;
 242 }
 243
 244 S390PCIBusDevice *s390_pci_find_dev_by_idx(uint32_t idx)
 245 {
 246     S390pciState *s = s390_get_phb();
 247
 248     return s->pbdev[idx & FH_MASK_INDEX];
 249 }
 250
 251 S390PCIBusDevice *s390_pci_find_dev_by_fh(uint32_t fh)
 252 {
 253     S390pciState *s = s390_get_phb();
 254     S390PCIBusDevice *pbdev;
 255
 256     pbdev = s->pbdev[fh & FH_MASK_INDEX];
 257     if (pbdev && pbdev->fh == fh) {
 258         return pbdev;
 259     }
 260
 261     return NULL;
 262 }
 263
 264 static void s390_pci_generate_event(uint8_t cc, uint16_t pec, uint32_t fh,
 265                                     uint32_t fid, uint64_t faddr, uint32_t e)
 266 {
 267     SeiContainer *sei_cont;
 268     S390pciState *s = s390_get_phb();
 269
 270     sei_cont = g_malloc0(sizeof(SeiContainer));
 271     sei_cont->fh = fh;
 272     sei_cont->fid = fid;
 273     sei_cont->cc = cc;
 274     sei_cont->pec = pec;
 275     sei_cont->faddr = faddr;
 276     sei_cont->e = e;
 277
 278     QTAILQ_INSERT_TAIL(&s->pending_sei, sei_cont, link);
 279     css_generate_css_crws(0);
 280 }
 281
 282 static void s390_pci_generate_plug_event(uint16_t pec, uint32_t fh,
 283                                          uint32_t fid)
 284 {
 285     s390_pci_generate_event(2, pec, fh, fid, 0, 0);
 286 }
 287
 288 void s390_pci_generate_error_event(uint16_t pec, uint32_t fh, uint32_t fid,
 289                                    uint64_t faddr, uint32_t e)
 290 {
 291     s390_pci_generate_event(1, pec, fh, fid, faddr, e);
 292 }
 293
 294 static void s390_pci_set_irq(void *opaque, int irq, int level)
 295 {
 296     /* nothing to do */
 297 }
 298
 299 static int s390_pci_map_irq(PCIDevice *pci_dev, int irq_num)
 300 {
 301     /* nothing to do */
 302     return 0;
 303 }
 304
 305 static uint64_t s390_pci_get_table_origin(uint64_t iota)
 306 {
 307     return iota & ~ZPCI_IOTA_RTTO_FLAG;
 308 }
 309
 310 static unsigned int calc_rtx(dma_addr_t ptr)
 311 {
 312     return ((unsigned long) ptr >> ZPCI_RT_SHIFT) & ZPCI_INDEX_MASK;
 313 }
 314
 315 static unsigned int calc_sx(dma_addr_t ptr)
 316 {
 317     return ((unsigned long) ptr >> ZPCI_ST_SHIFT) & ZPCI_INDEX_MASK;
 318 }
 319
 320 static unsigned int calc_px(dma_addr_t ptr)
 321 {
 322     return ((unsigned long) ptr >> PAGE_SHIFT) & ZPCI_PT_MASK;
 323 }
 324
 325 static uint64_t get_rt_sto(uint64_t entry)
 326 {
 327     return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_RTX)
 328                 ? (entry & ZPCI_RTE_ADDR_MASK)
 329                 : 0;
 330 }
 331
 332 static uint64_t get_st_pto(uint64_t entry)
 333 {
 334     return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_SX)
 335             ? (entry & ZPCI_STE_ADDR_MASK)
 336             : 0;
 337 }
 338
 339 static uint64_t s390_guest_io_table_walk(uint64_t guest_iota,
 340                                   uint64_t guest_dma_address)
 341 {
 342     uint64_t sto_a, pto_a, px_a;
 343     uint64_t sto, pto, pte;
 344     uint32_t rtx, sx, px;
 345
 346     rtx = calc_rtx(guest_dma_address);
 347     sx = calc_sx(guest_dma_address);
 348     px = calc_px(guest_dma_address);
 349
 350     sto_a = guest_iota + rtx * sizeof(uint64_t);
 351     sto = address_space_ldq(&address_space_memory, sto_a,
 352                             MEMTXATTRS_UNSPECIFIED, NULL);
 353     sto = get_rt_sto(sto);
 354     if (!sto) {
 355         pte = 0;
 356         goto out;
 357     }
 358
 359     pto_a = sto + sx * sizeof(uint64_t);
 360     pto = address_space_ldq(&address_space_memory, pto_a,
 361                             MEMTXATTRS_UNSPECIFIED, NULL);
 362     pto = get_st_pto(pto);
 363     if (!pto) {
 364         pte = 0;
 365         goto out;
 366     }
 367
 368     px_a = pto + px * sizeof(uint64_t);
 369     pte = address_space_ldq(&address_space_memory, px_a,
 370                             MEMTXATTRS_UNSPECIFIED, NULL);
 371
 372 out:
 373     return pte;
 374 }
 375
 376 static IOMMUTLBEntry s390_translate_iommu(MemoryRegion *iommu, hwaddr addr,
 377                                           bool is_write)
 378 {
 379     uint64_t pte;
 380     uint32_t flags;
 381     S390PCIBusDevice *pbdev = container_of(iommu, S390PCIBusDevice, iommu_mr);
 382     S390pciState *s;
 383     IOMMUTLBEntry ret = {
 384         .target_as = &address_space_memory,
 385         .iova = 0,
 386         .translated_addr = 0,
 387         .addr_mask = ~(hwaddr)0,
 388         .perm = IOMMU_NONE,
 389     };
 390
 391     switch (pbdev->state) {
 392     case ZPCI_FS_ENABLED:
 393     case ZPCI_FS_BLOCKED:
 394         if (!pbdev->iommu_enabled) {
 395             return ret;
 396         }
 397         break;
 398     default:
 399         return ret;
 400     }
 401
 402     DPRINTF("iommu trans addr 0x%" PRIx64 "\n", addr);
 403
 404     s = S390_PCI_HOST_BRIDGE(pci_device_root_bus(pbdev->pdev)->qbus.parent);
 405     /* s390 does not have an APIC mapped to main storage so we use
 406      * a separate AddressSpace only for msix notifications
 407      */
 408     if (addr == ZPCI_MSI_ADDR) {
 409         ret.target_as = &s->msix_notify_as;
 410         ret.iova = addr;
 411         ret.translated_addr = addr;
 412         ret.addr_mask = 0xfff;
 413         ret.perm = IOMMU_RW;
 414         return ret;
 415     }
 416
 417     if (addr < pbdev->pba || addr > pbdev->pal) {
 418         return ret;
 419     }
 420
 421     pte = s390_guest_io_table_walk(s390_pci_get_table_origin(pbdev->g_iota),
 422                                    addr);
 423     if (!pte) {
 424         return ret;
 425     }
 426
 427     flags = pte & ZPCI_PTE_FLAG_MASK;
 428     ret.iova = addr;
 429     ret.translated_addr = pte & ZPCI_PTE_ADDR_MASK;
 430     ret.addr_mask = 0xfff;
 431
 432     if (flags & ZPCI_PTE_INVALID) {
 433         ret.perm = IOMMU_NONE;
 434     } else {
 435         ret.perm = IOMMU_RW;
 436     }
 437
 438     return ret;
 439 }
 440
 441 static const MemoryRegionIOMMUOps s390_iommu_ops = {
 442     .translate = s390_translate_iommu,
 443 };
 444
 445 static AddressSpace *s390_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn)
 446 {
 447     S390pciState *s = opaque;
 448
 449     return &s->iommu[PCI_SLOT(devfn)]->as;
 450 }
 451
 452 static uint8_t set_ind_atomic(uint64_t ind_loc, uint8_t to_be_set)
 453 {
 454     uint8_t ind_old, ind_new;
 455     hwaddr len = 1;
 456     uint8_t *ind_addr;
 457
 458     ind_addr = cpu_physical_memory_map(ind_loc, &len, 1);
 459     if (!ind_addr) {
 460         s390_pci_generate_error_event(ERR_EVENT_AIRERR, 0, 0, 0, 0);
 461         return -1;
 462     }
 463     do {
 464         ind_old = *ind_addr;
 465         ind_new = ind_old | to_be_set;
 466     } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old);
 467     cpu_physical_memory_unmap(ind_addr, len, 1, len);
 468
 469     return ind_old;
 470 }
 471
 472 static void s390_msi_ctrl_write(void *opaque, hwaddr addr, uint64_t data,
 473                                 unsigned int size)
 474 {
 475     S390PCIBusDevice *pbdev;
 476     uint32_t io_int_word;
 477     uint32_t fid = data >> ZPCI_MSI_VEC_BITS;
 478     uint32_t vec = data & ZPCI_MSI_VEC_MASK;
 479     uint64_t ind_bit;
 480     uint32_t sum_bit;
 481     uint32_t e = 0;
 482
 483     DPRINTF("write_msix data 0x%" PRIx64 " fid %d vec 0x%x\n", data, fid, vec);
 484
 485     pbdev = s390_pci_find_dev_by_fid(fid);
 486     if (!pbdev) {
 487         e |= (vec << ERR_EVENT_MVN_OFFSET);
 488         s390_pci_generate_error_event(ERR_EVENT_NOMSI, 0, fid, addr, e);
 489         return;
 490     }
 491
 492     if (pbdev->state != ZPCI_FS_ENABLED) {
 493         return;
 494     }
 495
 496     ind_bit = pbdev->routes.adapter.ind_offset;
 497     sum_bit = pbdev->routes.adapter.summary_offset;
 498
 499     set_ind_atomic(pbdev->routes.adapter.ind_addr + (ind_bit + vec) / 8,
 500                    0x80 >> ((ind_bit + vec) % 8));
 501     if (!set_ind_atomic(pbdev->routes.adapter.summary_addr + sum_bit / 8,
 502                                        0x80 >> (sum_bit % 8))) {
 503         io_int_word = (pbdev->isc << 27) | IO_INT_WORD_AI;
 504         s390_io_interrupt(0, 0, 0, io_int_word);
 505     }
 506 }
 507
 508 static uint64_t s390_msi_ctrl_read(void *opaque, hwaddr addr, unsigned size)
 509 {
 510     return 0xffffffff;
 511 }
 512
 513 static const MemoryRegionOps s390_msi_ctrl_ops = {
 514     .write = s390_msi_ctrl_write,
 515     .read = s390_msi_ctrl_read,
 516     .endianness = DEVICE_LITTLE_ENDIAN,
 517 };
 518
 519 void s390_pci_iommu_enable(S390PCIBusDevice *pbdev)
 520 {
 521     memory_region_init_iommu(&pbdev->iommu_mr, OBJECT(&pbdev->iommu->mr),
 522                              &s390_iommu_ops, "iommu-s390", pbdev->pal + 1);
 523     memory_region_add_subregion(&pbdev->iommu->mr, 0, &pbdev->iommu_mr);
 524     pbdev->iommu_enabled = true;
 525 }
 526
 527 void s390_pci_iommu_disable(S390PCIBusDevice *pbdev)
 528 {
 529     memory_region_del_subregion(&pbdev->iommu->mr, &pbdev->iommu_mr);
 530     object_unparent(OBJECT(&pbdev->iommu_mr));
 531     pbdev->iommu_enabled = false;
 532 }
 533
 534 static void s390_pcihost_init_as(S390pciState *s)
 535 {
 536     int i;
 537     S390PCIIOMMU *iommu;
 538
 539     for (i = 0; i < PCI_SLOT_MAX; i++) {
 540         iommu = g_malloc0(sizeof(S390PCIIOMMU));
 541         memory_region_init(&iommu->mr, OBJECT(s),
 542                            "iommu-root-s390", UINT64_MAX);
 543         address_space_init(&iommu->as, &iommu->mr, "iommu-pci");
 544
 545         s->iommu[i] = iommu;
 546     }
 547
 548     memory_region_init_io(&s->msix_notify_mr, OBJECT(s),
 549                           &s390_msi_ctrl_ops, s, "msix-s390", UINT64_MAX);
 550     address_space_init(&s->msix_notify_as, &s->msix_notify_mr, "msix-pci");
 551 }
 552
 553 static int s390_pcihost_init(SysBusDevice *dev)
 554 {
 555     PCIBus *b;
 556     BusState *bus;
 557     PCIHostState *phb = PCI_HOST_BRIDGE(dev);
 558     S390pciState *s = S390_PCI_HOST_BRIDGE(dev);
 559
 560     DPRINTF("host_init\n");
 561
 562     b = pci_register_bus(DEVICE(dev), NULL,
 563                          s390_pci_set_irq, s390_pci_map_irq, NULL,
 564                          get_system_memory(), get_system_io(), 0, 64,
 565                          TYPE_PCI_BUS);
 566     s390_pcihost_init_as(s);
 567     pci_setup_iommu(b, s390_pci_dma_iommu, s);
 568
 569     bus = BUS(b);
 570     qbus_set_hotplug_handler(bus, DEVICE(dev), NULL);
 571     phb->bus = b;
 572
 573     s->bus = S390_PCI_BUS(qbus_create(TYPE_S390_PCI_BUS, DEVICE(s), NULL));
 574     qbus_set_hotplug_handler(BUS(s->bus), DEVICE(s), NULL);
 575
 576     QTAILQ_INIT(&s->pending_sei);
 577     return 0;
 578 }
 579
 580 static int s390_pcihost_setup_msix(S390PCIBusDevice *pbdev)
 581 {
 582     uint8_t pos;
 583     uint16_t ctrl;
 584     uint32_t table, pba;
 585
 586     pos = pci_find_capability(pbdev->pdev, PCI_CAP_ID_MSIX);
 587     if (!pos) {
 588         pbdev->msix.available = false;
 589         return 0;
 590     }
 591
 592     ctrl = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_FLAGS,
 593              pci_config_size(pbdev->pdev), sizeof(ctrl));
 594     table = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_TABLE,
 595              pci_config_size(pbdev->pdev), sizeof(table));
 596     pba = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_PBA,
 597              pci_config_size(pbdev->pdev), sizeof(pba));
 598
 599     pbdev->msix.table_bar = table & PCI_MSIX_FLAGS_BIRMASK;
 600     pbdev->msix.table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK;
 601     pbdev->msix.pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK;
 602     pbdev->msix.pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK;
 603     pbdev->msix.entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1;
 604     pbdev->msix.available = true;
 605     return 0;
 606 }
 607
 608 static S390PCIBusDevice *s390_pci_device_new(const char *target)
 609 {
 610     DeviceState *dev = NULL;
 611     S390pciState *s = s390_get_phb();
 612
 613     dev = qdev_try_create(BUS(s->bus), TYPE_S390_PCI_DEVICE);
 614     if (!dev) {
 615         return NULL;
 616     }
 617
 618     qdev_prop_set_string(dev, "target", target);
 619     qdev_init_nofail(dev);
 620
 621     return S390_PCI_DEVICE(dev);
 622 }
 623
 624 static void s390_pcihost_hot_plug(HotplugHandler *hotplug_dev,
 625                                   DeviceState *dev, Error **errp)
 626 {
 627     PCIDevice *pdev = NULL;
 628     S390PCIBusDevice *pbdev = NULL;
 629     S390pciState *s = s390_get_phb();
 630
 631     if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 632         pdev = PCI_DEVICE(dev);
 633
 634         if (!dev->id) {
 635             /* In the case the PCI device does not define an id */
 636             /* we generate one based on the PCI address         */
 637             dev->id = g_strdup_printf("auto_%02x:%02x.%01x",
 638                                       pci_bus_num(pdev->bus),
 639                                       PCI_SLOT(pdev->devfn),
 640                                       PCI_FUNC(pdev->devfn));
 641         }
 642
 643         pbdev = s390_pci_find_dev_by_target(dev->id);
 644         if (!pbdev) {
 645             pbdev = s390_pci_device_new(dev->id);
 646             if (!pbdev) {
 647                 error_setg(errp, "create zpci device failed");
 648             }
 649         }
 650
 651         if (object_dynamic_cast(OBJECT(dev), "vfio-pci")) {
 652             pbdev->fh |= FH_SHM_VFIO;
 653         } else {
 654             pbdev->fh |= FH_SHM_EMUL;
 655         }
 656
 657         pbdev->pdev = pdev;
 658         pbdev->iommu = s->iommu[PCI_SLOT(pdev->devfn)];
 659         pbdev->state = ZPCI_FS_STANDBY;
 660         s390_pcihost_setup_msix(pbdev);
 661
 662         if (dev->hotplugged) {
 663             s390_pci_generate_plug_event(HP_EVENT_RESERVED_TO_STANDBY,
 664                                          pbdev->fh, pbdev->fid);
 665         }
 666     } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) {
 667         int idx;
 668
 669         pbdev = S390_PCI_DEVICE(dev);
 670         for (idx = 0; idx < PCI_SLOT_MAX; idx++) {
 671             if (!s->pbdev[idx]) {
 672                 s->pbdev[idx] = pbdev;
 673                 pbdev->fh = idx;
 674                 return;
 675             }
 676         }
 677
 678         error_setg(errp, "no slot for plugging zpci device");
 679     }
 680 }
 681
 682 static void s390_pcihost_hot_unplug(HotplugHandler *hotplug_dev,
 683                                     DeviceState *dev, Error **errp)
 684 {
 685     int i;
 686     PCIDevice *pci_dev = NULL;
 687     S390PCIBusDevice *pbdev = NULL;
 688     S390pciState *s = s390_get_phb();
 689
 690     if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 691         pci_dev = PCI_DEVICE(dev);
 692
 693         for (i = 0 ; i < PCI_SLOT_MAX; i++) {
 694             if (s->pbdev[i]->pdev == pci_dev) {
 695                 pbdev = s->pbdev[i];
 696                 break;
 697             }
 698         }
 699
 700         if (!pbdev) {
 701             object_unparent(OBJECT(pci_dev));
 702             return;
 703         }
 704     } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) {
 705         pbdev = S390_PCI_DEVICE(dev);
 706         pci_dev = pbdev->pdev;
 707     }
 708
 709     switch (pbdev->state) {
 710     case ZPCI_FS_RESERVED:
 711         goto out;
 712     case ZPCI_FS_STANDBY:
 713         break;
 714     default:
 715         s390_pci_generate_plug_event(HP_EVENT_CONFIGURED_TO_STBRES,
 716                                      pbdev->fh, pbdev->fid);
 717     }
 718
 719     s390_pci_generate_plug_event(HP_EVENT_STANDBY_TO_RESERVED,
 720                                  pbdev->fh, pbdev->fid);
 721     object_unparent(OBJECT(pci_dev));
 722     pbdev->pdev = NULL;
 723     pbdev->state = ZPCI_FS_RESERVED;
 724 out:
 725     pbdev->fid = 0;
 726     s->pbdev[pbdev->fh & FH_MASK_INDEX] = NULL;
 727     object_unparent(OBJECT(pbdev));
 728 }
 729
 730 static void s390_pcihost_class_init(ObjectClass *klass, void *data)
 731 {
 732     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 733     DeviceClass *dc = DEVICE_CLASS(klass);
 734     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
 735
 736     dc->cannot_instantiate_with_device_add_yet = true;
 737     k->init = s390_pcihost_init;
 738     hc->plug = s390_pcihost_hot_plug;
 739     hc->unplug = s390_pcihost_hot_unplug;
 740     msi_nonbroken = true;
 741 }
 742
 743 static const TypeInfo s390_pcihost_info = {
 744     .name          = TYPE_S390_PCI_HOST_BRIDGE,
 745     .parent        = TYPE_PCI_HOST_BRIDGE,
 746     .instance_size = sizeof(S390pciState),
 747     .class_init    = s390_pcihost_class_init,
 748     .interfaces = (InterfaceInfo[]) {
 749         { TYPE_HOTPLUG_HANDLER },
 750         { }
 751     }
 752 };
 753
 754 static const TypeInfo s390_pcibus_info = {
 755     .name = TYPE_S390_PCI_BUS,
 756     .parent = TYPE_BUS,
 757     .instance_size = sizeof(S390PCIBus),
 758 };
 759
 760 static uint16_t s390_pci_generate_uid(void)
 761 {
 762     uint16_t uid = 0;
 763
 764     do {
 765         uid++;
 766         if (!s390_pci_find_dev_by_uid(uid)) {
 767             return uid;
 768         }
 769     } while (uid < ZPCI_MAX_UID);
 770
 771     return UID_UNDEFINED;
 772 }
 773
 774 static uint32_t s390_pci_generate_fid(Error **errp)
 775 {
 776     uint32_t fid = 0;
 777
 778     while (fid <= ZPCI_MAX_FID) {
 779         if (!s390_pci_find_dev_by_fid(fid)) {
 780             return fid;
 781         }
 782
 783         if (fid == ZPCI_MAX_FID) {
 784             break;
 785         }
 786
 787         fid++;
 788     }
 789
 790     error_setg(errp, "no free fid could be found");
 791     return 0;
 792 }
 793
 794 static void s390_pci_device_realize(DeviceState *dev, Error **errp)
 795 {
 796     S390PCIBusDevice *zpci = S390_PCI_DEVICE(dev);
 797
 798     if (!zpci->target) {
 799         error_setg(errp, "target must be defined");
 800         return;
 801     }
 802
 803     if (s390_pci_find_dev_by_target(zpci->target)) {
 804         error_setg(errp, "target %s already has an associated zpci device",
 805                    zpci->target);
 806         return;
 807     }
 808
 809     if (zpci->uid == UID_UNDEFINED) {
 810         zpci->uid = s390_pci_generate_uid();
 811         if (!zpci->uid) {
 812             error_setg(errp, "no free uid could be found");
 813             return;
 814         }
 815     } else if (s390_pci_find_dev_by_uid(zpci->uid)) {
 816         error_setg(errp, "uid %u already in use", zpci->uid);
 817         return;
 818     }
 819
 820     if (!zpci->fid_defined) {
 821         Error *local_error = NULL;
 822
 823         zpci->fid = s390_pci_generate_fid(&local_error);
 824         if (local_error) {
 825             error_propagate(errp, local_error);
 826             return;
 827         }
 828     } else if (s390_pci_find_dev_by_fid(zpci->fid)) {
 829         error_setg(errp, "fid %u already in use", zpci->fid);
 830         return;
 831     }
 832
 833     zpci->state = ZPCI_FS_RESERVED;
 834 }
 835
 836 static void s390_pci_device_reset(DeviceState *dev)
 837 {
 838     S390PCIBusDevice *pbdev = S390_PCI_DEVICE(dev);
 839
 840     switch (pbdev->state) {
 841     case ZPCI_FS_RESERVED:
 842         return;
 843     case ZPCI_FS_STANDBY:
 844         break;
 845     default:
 846         pbdev->fh &= ~FH_MASK_ENABLE;
 847         pbdev->state = ZPCI_FS_DISABLED;
 848         break;
 849     }
 850
 851     if (pbdev->summary_ind) {
 852         pci_dereg_irqs(pbdev);
 853     }
 854     if (pbdev->iommu_enabled) {
 855         pci_dereg_ioat(pbdev);
 856     }
 857
 858     pbdev->fmb_addr = 0;
 859 }
 860
 861 static void s390_pci_get_fid(Object *obj, Visitor *v, const char *name,
 862                          void *opaque, Error **errp)
 863 {
 864     Property *prop = opaque;
 865     uint32_t *ptr = qdev_get_prop_ptr(DEVICE(obj), prop);
 866
 867     visit_type_uint32(v, name, ptr, errp);
 868 }
 869
 870 static void s390_pci_set_fid(Object *obj, Visitor *v, const char *name,
 871                          void *opaque, Error **errp)
 872 {
 873     DeviceState *dev = DEVICE(obj);
 874     S390PCIBusDevice *zpci = S390_PCI_DEVICE(obj);
 875     Property *prop = opaque;
 876     uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
 877
 878     if (dev->realized) {
 879         qdev_prop_set_after_realize(dev, name, errp);
 880         return;
 881     }
 882
 883     visit_type_uint32(v, name, ptr, errp);
 884     zpci->fid_defined = true;
 885 }
 886
 887 static PropertyInfo s390_pci_fid_propinfo = {
 888     .name = "zpci_fid",
 889     .get = s390_pci_get_fid,
 890     .set = s390_pci_set_fid,
 891 };
 892
 893 #define DEFINE_PROP_S390_PCI_FID(_n, _s, _f) \
 894     DEFINE_PROP(_n, _s, _f, s390_pci_fid_propinfo, uint32_t)
 895
 896 static Property s390_pci_device_properties[] = {
 897     DEFINE_PROP_UINT16("uid", S390PCIBusDevice, uid, UID_UNDEFINED),
 898     DEFINE_PROP_S390_PCI_FID("fid", S390PCIBusDevice, fid),
 899     DEFINE_PROP_STRING("target", S390PCIBusDevice, target),
 900     DEFINE_PROP_END_OF_LIST(),
 901 };
 902
 903 static void s390_pci_device_class_init(ObjectClass *klass, void *data)
 904 {
 905     DeviceClass *dc = DEVICE_CLASS(klass);
 906
 907     dc->desc = "zpci device";
 908     dc->reset = s390_pci_device_reset;
 909     dc->bus_type = TYPE_S390_PCI_BUS;
 910     dc->realize = s390_pci_device_realize;
 911     dc->props = s390_pci_device_properties;
 912 }
 913
 914 static const TypeInfo s390_pci_device_info = {
 915     .name = TYPE_S390_PCI_DEVICE,
 916     .parent = TYPE_DEVICE,
 917     .instance_size = sizeof(S390PCIBusDevice),
 918     .class_init = s390_pci_device_class_init,
 919 };
 920
 921 static void s390_pci_register_types(void)
 922 {
 923     type_register_static(&s390_pcihost_info);
 924     type_register_static(&s390_pcibus_info);
 925     type_register_static(&s390_pci_device_info);
 926 }
 927
 928 type_init(s390_pci_register_types)