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/pci_bridge.h"
  23 #include "hw/pci/msi.h"
  24 #include "qemu/error-report.h"
  25
  26 #ifndef DEBUG_S390PCI_BUS
  27 #define DEBUG_S390PCI_BUS  0
  28 #endif
  29
  30 #define DPRINTF(fmt, ...)                                         \
  31     do {                                                          \
  32         if (DEBUG_S390PCI_BUS) {                                  \
  33             fprintf(stderr, "S390pci-bus: " fmt, ## __VA_ARGS__); \
  34         }                                                         \
  35     } while (0)
  36
  37 S390pciState *s390_get_phb(void)
  38 {
  39     static S390pciState *phb;
  40
  41     if (!phb) {
  42         phb = S390_PCI_HOST_BRIDGE(
  43             object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
  44         assert(phb != NULL);
  45     }
  46
  47     return phb;
  48 }
  49
  50 int pci_chsc_sei_nt2_get_event(void *res)
  51 {
  52     ChscSeiNt2Res *nt2_res = (ChscSeiNt2Res *)res;
  53     PciCcdfAvail *accdf;
  54     PciCcdfErr *eccdf;
  55     int rc = 1;
  56     SeiContainer *sei_cont;
  57     S390pciState *s = s390_get_phb();
  58
  59     sei_cont = QTAILQ_FIRST(&s->pending_sei);
  60     if (sei_cont) {
  61         QTAILQ_REMOVE(&s->pending_sei, sei_cont, link);
  62         nt2_res->nt = 2;
  63         nt2_res->cc = sei_cont->cc;
  64         nt2_res->length = cpu_to_be16(sizeof(ChscSeiNt2Res));
  65         switch (sei_cont->cc) {
  66         case 1: /* error event */
  67             eccdf = (PciCcdfErr *)nt2_res->ccdf;
  68             eccdf->fid = cpu_to_be32(sei_cont->fid);
  69             eccdf->fh = cpu_to_be32(sei_cont->fh);
  70             eccdf->e = cpu_to_be32(sei_cont->e);
  71             eccdf->faddr = cpu_to_be64(sei_cont->faddr);
  72             eccdf->pec = cpu_to_be16(sei_cont->pec);
  73             break;
  74         case 2: /* availability event */
  75             accdf = (PciCcdfAvail *)nt2_res->ccdf;
  76             accdf->fid = cpu_to_be32(sei_cont->fid);
  77             accdf->fh = cpu_to_be32(sei_cont->fh);
  78             accdf->pec = cpu_to_be16(sei_cont->pec);
  79             break;
  80         default:
  81             abort();
  82         }
  83         g_free(sei_cont);
  84         rc = 0;
  85     }
  86
  87     return rc;
  88 }
  89
  90 int pci_chsc_sei_nt2_have_event(void)
  91 {
  92     S390pciState *s = s390_get_phb();
  93
  94     return !QTAILQ_EMPTY(&s->pending_sei);
  95 }
  96
  97 S390PCIBusDevice *s390_pci_find_next_avail_dev(S390pciState *s,
  98                                                S390PCIBusDevice *pbdev)
  99 {
 100     S390PCIBusDevice *ret = pbdev ? QTAILQ_NEXT(pbdev, link) :
 101         QTAILQ_FIRST(&s->zpci_devs);
 102
 103     while (ret && ret->state == ZPCI_FS_RESERVED) {
 104         ret = QTAILQ_NEXT(ret, link);
 105     }
 106
 107     return ret;
 108 }
 109
 110 S390PCIBusDevice *s390_pci_find_dev_by_fid(S390pciState *s, uint32_t fid)
 111 {
 112     S390PCIBusDevice *pbdev;
 113
 114     QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) {
 115         if (pbdev->fid == fid) {
 116             return pbdev;
 117         }
 118     }
 119
 120     return NULL;
 121 }
 122
 123 void s390_pci_sclp_configure(SCCB *sccb)
 124 {
 125     IoaCfgSccb *psccb = (IoaCfgSccb *)sccb;
 126     S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(s390_get_phb(),
 127                                                        be32_to_cpu(psccb->aid));
 128     uint16_t rc;
 129
 130     if (!pbdev) {
 131         DPRINTF("sclp config no dev found\n");
 132         rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED;
 133         goto out;
 134     }
 135
 136     switch (pbdev->state) {
 137     case ZPCI_FS_RESERVED:
 138         rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE;
 139         break;
 140     case ZPCI_FS_STANDBY:
 141         pbdev->state = ZPCI_FS_DISABLED;
 142         rc = SCLP_RC_NORMAL_COMPLETION;
 143         break;
 144     default:
 145         rc = SCLP_RC_NO_ACTION_REQUIRED;
 146     }
 147 out:
 148     psccb->header.response_code = cpu_to_be16(rc);
 149 }
 150
 151 void s390_pci_sclp_deconfigure(SCCB *sccb)
 152 {
 153     IoaCfgSccb *psccb = (IoaCfgSccb *)sccb;
 154     S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(s390_get_phb(),
 155                                                        be32_to_cpu(psccb->aid));
 156     uint16_t rc;
 157
 158     if (!pbdev) {
 159         DPRINTF("sclp deconfig no dev found\n");
 160         rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED;
 161         goto out;
 162     }
 163
 164     switch (pbdev->state) {
 165     case ZPCI_FS_RESERVED:
 166         rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE;
 167         break;
 168     case ZPCI_FS_STANDBY:
 169         rc = SCLP_RC_NO_ACTION_REQUIRED;
 170         break;
 171     default:
 172         if (pbdev->summary_ind) {
 173             pci_dereg_irqs(pbdev);
 174         }
 175         if (pbdev->iommu->enabled) {
 176             pci_dereg_ioat(pbdev->iommu);
 177         }
 178         pbdev->state = ZPCI_FS_STANDBY;
 179         rc = SCLP_RC_NORMAL_COMPLETION;
 180
 181         if (pbdev->release_timer) {
 182             qdev_unplug(DEVICE(pbdev->pdev), NULL);
 183         }
 184     }
 185 out:
 186     psccb->header.response_code = cpu_to_be16(rc);
 187 }
 188
 189 static S390PCIBusDevice *s390_pci_find_dev_by_uid(S390pciState *s, uint16_t uid)
 190 {
 191     S390PCIBusDevice *pbdev;
 192
 193     QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) {
 194         if (pbdev->uid == uid) {
 195             return pbdev;
 196         }
 197     }
 198
 199     return NULL;
 200 }
 201
 202 S390PCIBusDevice *s390_pci_find_dev_by_target(S390pciState *s,
 203                                               const char *target)
 204 {
 205     S390PCIBusDevice *pbdev;
 206
 207     if (!target) {
 208         return NULL;
 209     }
 210
 211     QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) {
 212         if (!strcmp(pbdev->target, target)) {
 213             return pbdev;
 214         }
 215     }
 216
 217     return NULL;
 218 }
 219
 220 S390PCIBusDevice *s390_pci_find_dev_by_idx(S390pciState *s, uint32_t idx)
 221 {
 222     return g_hash_table_lookup(s->zpci_table, &idx);
 223 }
 224
 225 S390PCIBusDevice *s390_pci_find_dev_by_fh(S390pciState *s, uint32_t fh)
 226 {
 227     uint32_t idx = FH_MASK_INDEX & fh;
 228     S390PCIBusDevice *pbdev = s390_pci_find_dev_by_idx(s, idx);
 229
 230     if (pbdev && pbdev->fh == fh) {
 231         return pbdev;
 232     }
 233
 234     return NULL;
 235 }
 236
 237 static void s390_pci_generate_event(uint8_t cc, uint16_t pec, uint32_t fh,
 238                                     uint32_t fid, uint64_t faddr, uint32_t e)
 239 {
 240     SeiContainer *sei_cont;
 241     S390pciState *s = s390_get_phb();
 242
 243     sei_cont = g_new0(SeiContainer, 1);
 244     sei_cont->fh = fh;
 245     sei_cont->fid = fid;
 246     sei_cont->cc = cc;
 247     sei_cont->pec = pec;
 248     sei_cont->faddr = faddr;
 249     sei_cont->e = e;
 250
 251     QTAILQ_INSERT_TAIL(&s->pending_sei, sei_cont, link);
 252     css_generate_css_crws(0);
 253 }
 254
 255 static void s390_pci_generate_plug_event(uint16_t pec, uint32_t fh,
 256                                          uint32_t fid)
 257 {
 258     s390_pci_generate_event(2, pec, fh, fid, 0, 0);
 259 }
 260
 261 void s390_pci_generate_error_event(uint16_t pec, uint32_t fh, uint32_t fid,
 262                                    uint64_t faddr, uint32_t e)
 263 {
 264     s390_pci_generate_event(1, pec, fh, fid, faddr, e);
 265 }
 266
 267 static void s390_pci_set_irq(void *opaque, int irq, int level)
 268 {
 269     /* nothing to do */
 270 }
 271
 272 static int s390_pci_map_irq(PCIDevice *pci_dev, int irq_num)
 273 {
 274     /* nothing to do */
 275     return 0;
 276 }
 277
 278 static uint64_t s390_pci_get_table_origin(uint64_t iota)
 279 {
 280     return iota & ~ZPCI_IOTA_RTTO_FLAG;
 281 }
 282
 283 static unsigned int calc_rtx(dma_addr_t ptr)
 284 {
 285     return ((unsigned long) ptr >> ZPCI_RT_SHIFT) & ZPCI_INDEX_MASK;
 286 }
 287
 288 static unsigned int calc_sx(dma_addr_t ptr)
 289 {
 290     return ((unsigned long) ptr >> ZPCI_ST_SHIFT) & ZPCI_INDEX_MASK;
 291 }
 292
 293 static unsigned int calc_px(dma_addr_t ptr)
 294 {
 295     return ((unsigned long) ptr >> PAGE_SHIFT) & ZPCI_PT_MASK;
 296 }
 297
 298 static uint64_t get_rt_sto(uint64_t entry)
 299 {
 300     return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_RTX)
 301                 ? (entry & ZPCI_RTE_ADDR_MASK)
 302                 : 0;
 303 }
 304
 305 static uint64_t get_st_pto(uint64_t entry)
 306 {
 307     return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_SX)
 308             ? (entry & ZPCI_STE_ADDR_MASK)
 309             : 0;
 310 }
 311
 312 static bool rt_entry_isvalid(uint64_t entry)
 313 {
 314     return (entry & ZPCI_TABLE_VALID_MASK) == ZPCI_TABLE_VALID;
 315 }
 316
 317 static bool pt_entry_isvalid(uint64_t entry)
 318 {
 319     return (entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_VALID;
 320 }
 321
 322 static bool entry_isprotected(uint64_t entry)
 323 {
 324     return (entry & ZPCI_TABLE_PROT_MASK) == ZPCI_TABLE_PROTECTED;
 325 }
 326
 327 /* ett is expected table type, -1 page table, 0 segment table, 1 region table */
 328 static uint64_t get_table_index(uint64_t iova, int8_t ett)
 329 {
 330     switch (ett) {
 331     case ZPCI_ETT_PT:
 332         return calc_px(iova);
 333     case ZPCI_ETT_ST:
 334         return calc_sx(iova);
 335     case ZPCI_ETT_RT:
 336         return calc_rtx(iova);
 337     }
 338
 339     return -1;
 340 }
 341
 342 static bool entry_isvalid(uint64_t entry, int8_t ett)
 343 {
 344     switch (ett) {
 345     case ZPCI_ETT_PT:
 346         return pt_entry_isvalid(entry);
 347     case ZPCI_ETT_ST:
 348     case ZPCI_ETT_RT:
 349         return rt_entry_isvalid(entry);
 350     }
 351
 352     return false;
 353 }
 354
 355 /* Return true if address translation is done */
 356 static bool translate_iscomplete(uint64_t entry, int8_t ett)
 357 {
 358     switch (ett) {
 359     case 0:
 360         return (entry & ZPCI_TABLE_FC) ? true : false;
 361     case 1:
 362         return false;
 363     }
 364
 365     return true;
 366 }
 367
 368 static uint64_t get_frame_size(int8_t ett)
 369 {
 370     switch (ett) {
 371     case ZPCI_ETT_PT:
 372         return 1ULL << 12;
 373     case ZPCI_ETT_ST:
 374         return 1ULL << 20;
 375     case ZPCI_ETT_RT:
 376         return 1ULL << 31;
 377     }
 378
 379     return 0;
 380 }
 381
 382 static uint64_t get_next_table_origin(uint64_t entry, int8_t ett)
 383 {
 384     switch (ett) {
 385     case ZPCI_ETT_PT:
 386         return entry & ZPCI_PTE_ADDR_MASK;
 387     case ZPCI_ETT_ST:
 388         return get_st_pto(entry);
 389     case ZPCI_ETT_RT:
 390         return get_rt_sto(entry);
 391     }
 392
 393     return 0;
 394 }
 395
 396 /**
 397  * table_translate: do translation within one table and return the following
 398  *                  table origin
 399  *
 400  * @entry: the entry being translated, the result is stored in this.
 401  * @to: the address of table origin.
 402  * @ett: expected table type, 1 region table, 0 segment table and -1 page table.
 403  * @error: error code
 404  */
 405 static uint64_t table_translate(S390IOTLBEntry *entry, uint64_t to, int8_t ett,
 406                                 uint16_t *error)
 407 {
 408     uint64_t tx, te, nto = 0;
 409     uint16_t err = 0;
 410
 411     tx = get_table_index(entry->iova, ett);
 412     te = address_space_ldq(&address_space_memory, to + tx * sizeof(uint64_t),
 413                            MEMTXATTRS_UNSPECIFIED, NULL);
 414
 415     if (!te) {
 416         err = ERR_EVENT_INVALTE;
 417         goto out;
 418     }
 419
 420     if (!entry_isvalid(te, ett)) {
 421         entry->perm &= IOMMU_NONE;
 422         goto out;
 423     }
 424
 425     if (ett == ZPCI_ETT_RT && ((te & ZPCI_TABLE_LEN_RTX) != ZPCI_TABLE_LEN_RTX
 426                                || te & ZPCI_TABLE_OFFSET_MASK)) {
 427         err = ERR_EVENT_INVALTL;
 428         goto out;
 429     }
 430
 431     nto = get_next_table_origin(te, ett);
 432     if (!nto) {
 433         err = ERR_EVENT_TT;
 434         goto out;
 435     }
 436
 437     if (entry_isprotected(te)) {
 438         entry->perm &= IOMMU_RO;
 439     } else {
 440         entry->perm &= IOMMU_RW;
 441     }
 442
 443     if (translate_iscomplete(te, ett)) {
 444         switch (ett) {
 445         case ZPCI_ETT_PT:
 446             entry->translated_addr = te & ZPCI_PTE_ADDR_MASK;
 447             break;
 448         case ZPCI_ETT_ST:
 449             entry->translated_addr = (te & ZPCI_SFAA_MASK) |
 450                 (entry->iova & ~ZPCI_SFAA_MASK);
 451             break;
 452         }
 453         nto = 0;
 454     }
 455 out:
 456     if (err) {
 457         entry->perm = IOMMU_NONE;
 458         *error = err;
 459     }
 460     entry->len = get_frame_size(ett);
 461     return nto;
 462 }
 463
 464 uint16_t s390_guest_io_table_walk(uint64_t g_iota, hwaddr addr,
 465                                   S390IOTLBEntry *entry)
 466 {
 467     uint64_t to = s390_pci_get_table_origin(g_iota);
 468     int8_t ett = 1;
 469     uint16_t error = 0;
 470
 471     entry->iova = addr & PAGE_MASK;
 472     entry->translated_addr = 0;
 473     entry->perm = IOMMU_RW;
 474
 475     if (entry_isprotected(g_iota)) {
 476         entry->perm &= IOMMU_RO;
 477     }
 478
 479     while (to) {
 480         to = table_translate(entry, to, ett--, &error);
 481     }
 482
 483     return error;
 484 }
 485
 486 static IOMMUTLBEntry s390_translate_iommu(IOMMUMemoryRegion *mr, hwaddr addr,
 487                                           IOMMUAccessFlags flag)
 488 {
 489     S390PCIIOMMU *iommu = container_of(mr, S390PCIIOMMU, iommu_mr);
 490     S390IOTLBEntry *entry;
 491     uint64_t iova = addr & PAGE_MASK;
 492     uint16_t error = 0;
 493     IOMMUTLBEntry ret = {
 494         .target_as = &address_space_memory,
 495         .iova = 0,
 496         .translated_addr = 0,
 497         .addr_mask = ~(hwaddr)0,
 498         .perm = IOMMU_NONE,
 499     };
 500
 501     switch (iommu->pbdev->state) {
 502     case ZPCI_FS_ENABLED:
 503     case ZPCI_FS_BLOCKED:
 504         if (!iommu->enabled) {
 505             return ret;
 506         }
 507         break;
 508     default:
 509         return ret;
 510     }
 511
 512     DPRINTF("iommu trans addr 0x%" PRIx64 "\n", addr);
 513
 514     if (addr < iommu->pba || addr > iommu->pal) {
 515         error = ERR_EVENT_OORANGE;
 516         goto err;
 517     }
 518
 519     entry = g_hash_table_lookup(iommu->iotlb, &iova);
 520     if (entry) {
 521         ret.iova = entry->iova;
 522         ret.translated_addr = entry->translated_addr;
 523         ret.addr_mask = entry->len - 1;
 524         ret.perm = entry->perm;
 525     } else {
 526         ret.iova = iova;
 527         ret.addr_mask = ~PAGE_MASK;
 528         ret.perm = IOMMU_NONE;
 529     }
 530
 531     if (flag != IOMMU_NONE && !(flag & ret.perm)) {
 532         error = ERR_EVENT_TPROTE;
 533     }
 534 err:
 535     if (error) {
 536         iommu->pbdev->state = ZPCI_FS_ERROR;
 537         s390_pci_generate_error_event(error, iommu->pbdev->fh,
 538                                       iommu->pbdev->fid, addr, 0);
 539     }
 540     return ret;
 541 }
 542
 543 static void s390_pci_iommu_replay(IOMMUMemoryRegion *iommu,
 544                                   IOMMUNotifier *notifier)
 545 {
 546     /* It's impossible to plug a pci device on s390x that already has iommu
 547      * mappings which need to be replayed, that is due to the "one iommu per
 548      * zpci device" construct. But when we support migration of vfio-pci
 549      * devices in future, we need to revisit this.
 550      */
 551     return;
 552 }
 553
 554 static S390PCIIOMMU *s390_pci_get_iommu(S390pciState *s, PCIBus *bus,
 555                                         int devfn)
 556 {
 557     uint64_t key = (uintptr_t)bus;
 558     S390PCIIOMMUTable *table = g_hash_table_lookup(s->iommu_table, &key);
 559     S390PCIIOMMU *iommu;
 560
 561     if (!table) {
 562         table = g_new0(S390PCIIOMMUTable, 1);
 563         table->key = key;
 564         g_hash_table_insert(s->iommu_table, &table->key, table);
 565     }
 566
 567     iommu = table->iommu[PCI_SLOT(devfn)];
 568     if (!iommu) {
 569         iommu = S390_PCI_IOMMU(object_new(TYPE_S390_PCI_IOMMU));
 570
 571         char *mr_name = g_strdup_printf("iommu-root-%02x:%02x.%01x",
 572                                         pci_bus_num(bus),
 573                                         PCI_SLOT(devfn),
 574                                         PCI_FUNC(devfn));
 575         char *as_name = g_strdup_printf("iommu-pci-%02x:%02x.%01x",
 576                                         pci_bus_num(bus),
 577                                         PCI_SLOT(devfn),
 578                                         PCI_FUNC(devfn));
 579         memory_region_init(&iommu->mr, OBJECT(iommu), mr_name, UINT64_MAX);
 580         address_space_init(&iommu->as, &iommu->mr, as_name);
 581         iommu->iotlb = g_hash_table_new_full(g_int64_hash, g_int64_equal,
 582                                              NULL, g_free);
 583         table->iommu[PCI_SLOT(devfn)] = iommu;
 584
 585         g_free(mr_name);
 586         g_free(as_name);
 587     }
 588
 589     return iommu;
 590 }
 591
 592 static AddressSpace *s390_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn)
 593 {
 594     S390pciState *s = opaque;
 595     S390PCIIOMMU *iommu = s390_pci_get_iommu(s, bus, devfn);
 596
 597     return &iommu->as;
 598 }
 599
 600 static uint8_t set_ind_atomic(uint64_t ind_loc, uint8_t to_be_set)
 601 {
 602     uint8_t ind_old, ind_new;
 603     hwaddr len = 1;
 604     uint8_t *ind_addr;
 605
 606     ind_addr = cpu_physical_memory_map(ind_loc, &len, 1);
 607     if (!ind_addr) {
 608         s390_pci_generate_error_event(ERR_EVENT_AIRERR, 0, 0, 0, 0);
 609         return -1;
 610     }
 611     do {
 612         ind_old = *ind_addr;
 613         ind_new = ind_old | to_be_set;
 614     } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old);
 615     cpu_physical_memory_unmap(ind_addr, len, 1, len);
 616
 617     return ind_old;
 618 }
 619
 620 static void s390_msi_ctrl_write(void *opaque, hwaddr addr, uint64_t data,
 621                                 unsigned int size)
 622 {
 623     S390PCIBusDevice *pbdev = opaque;
 624     uint32_t vec = data & ZPCI_MSI_VEC_MASK;
 625     uint64_t ind_bit;
 626     uint32_t sum_bit;
 627
 628     assert(pbdev);
 629     DPRINTF("write_msix data 0x%" PRIx64 " idx %d vec 0x%x\n", data,
 630             pbdev->idx, vec);
 631
 632     if (pbdev->state != ZPCI_FS_ENABLED) {
 633         return;
 634     }
 635
 636     ind_bit = pbdev->routes.adapter.ind_offset;
 637     sum_bit = pbdev->routes.adapter.summary_offset;
 638
 639     set_ind_atomic(pbdev->routes.adapter.ind_addr + (ind_bit + vec) / 8,
 640                    0x80 >> ((ind_bit + vec) % 8));
 641     if (!set_ind_atomic(pbdev->routes.adapter.summary_addr + sum_bit / 8,
 642                                        0x80 >> (sum_bit % 8))) {
 643         css_adapter_interrupt(CSS_IO_ADAPTER_PCI, pbdev->isc);
 644     }
 645 }
 646
 647 static uint64_t s390_msi_ctrl_read(void *opaque, hwaddr addr, unsigned size)
 648 {
 649     return 0xffffffff;
 650 }
 651
 652 static const MemoryRegionOps s390_msi_ctrl_ops = {
 653     .write = s390_msi_ctrl_write,
 654     .read = s390_msi_ctrl_read,
 655     .endianness = DEVICE_LITTLE_ENDIAN,
 656 };
 657
 658 void s390_pci_iommu_enable(S390PCIIOMMU *iommu)
 659 {
 660     char *name = g_strdup_printf("iommu-s390-%04x", iommu->pbdev->uid);
 661     memory_region_init_iommu(&iommu->iommu_mr, sizeof(iommu->iommu_mr),
 662                              TYPE_S390_IOMMU_MEMORY_REGION, OBJECT(&iommu->mr),
 663                              name, iommu->pal + 1);
 664     iommu->enabled = true;
 665     memory_region_add_subregion(&iommu->mr, 0, MEMORY_REGION(&iommu->iommu_mr));
 666     g_free(name);
 667 }
 668
 669 void s390_pci_iommu_disable(S390PCIIOMMU *iommu)
 670 {
 671     iommu->enabled = false;
 672     g_hash_table_remove_all(iommu->iotlb);
 673     memory_region_del_subregion(&iommu->mr, MEMORY_REGION(&iommu->iommu_mr));
 674     object_unparent(OBJECT(&iommu->iommu_mr));
 675 }
 676
 677 static void s390_pci_iommu_free(S390pciState *s, PCIBus *bus, int32_t devfn)
 678 {
 679     uint64_t key = (uintptr_t)bus;
 680     S390PCIIOMMUTable *table = g_hash_table_lookup(s->iommu_table, &key);
 681     S390PCIIOMMU *iommu = table ? table->iommu[PCI_SLOT(devfn)] : NULL;
 682
 683     if (!table || !iommu) {
 684         return;
 685     }
 686
 687     table->iommu[PCI_SLOT(devfn)] = NULL;
 688     g_hash_table_destroy(iommu->iotlb);
 689     address_space_destroy(&iommu->as);
 690     object_unparent(OBJECT(&iommu->mr));
 691     object_unparent(OBJECT(iommu));
 692     object_unref(OBJECT(iommu));
 693 }
 694
 695 static int s390_pcihost_init(SysBusDevice *dev)
 696 {
 697     PCIBus *b;
 698     BusState *bus;
 699     PCIHostState *phb = PCI_HOST_BRIDGE(dev);
 700     S390pciState *s = S390_PCI_HOST_BRIDGE(dev);
 701
 702     DPRINTF("host_init\n");
 703
 704     b = pci_register_root_bus(DEVICE(dev), NULL,
 705                               s390_pci_set_irq, s390_pci_map_irq, NULL,
 706                               get_system_memory(), get_system_io(), 0, 64,
 707                               TYPE_PCI_BUS);
 708     pci_setup_iommu(b, s390_pci_dma_iommu, s);
 709
 710     bus = BUS(b);
 711     qbus_set_hotplug_handler(bus, DEVICE(dev), NULL);
 712     phb->bus = b;
 713
 714     s->bus = S390_PCI_BUS(qbus_create(TYPE_S390_PCI_BUS, DEVICE(s), NULL));
 715     qbus_set_hotplug_handler(BUS(s->bus), DEVICE(s), NULL);
 716
 717     s->iommu_table = g_hash_table_new_full(g_int64_hash, g_int64_equal,
 718                                            NULL, g_free);
 719     s->zpci_table = g_hash_table_new_full(g_int_hash, g_int_equal, NULL, NULL);
 720     s->bus_no = 0;
 721     QTAILQ_INIT(&s->pending_sei);
 722     QTAILQ_INIT(&s->zpci_devs);
 723
 724     css_register_io_adapters(CSS_IO_ADAPTER_PCI, true, false,
 725                              S390_ADAPTER_SUPPRESSIBLE, &error_abort);
 726
 727     return 0;
 728 }
 729
 730 static int s390_pci_msix_init(S390PCIBusDevice *pbdev)
 731 {
 732     char *name;
 733     uint8_t pos;
 734     uint16_t ctrl;
 735     uint32_t table, pba;
 736
 737     pos = pci_find_capability(pbdev->pdev, PCI_CAP_ID_MSIX);
 738     if (!pos) {
 739         pbdev->msix.available = false;
 740         return -1;
 741     }
 742
 743     ctrl = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_FLAGS,
 744              pci_config_size(pbdev->pdev), sizeof(ctrl));
 745     table = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_TABLE,
 746              pci_config_size(pbdev->pdev), sizeof(table));
 747     pba = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_PBA,
 748              pci_config_size(pbdev->pdev), sizeof(pba));
 749
 750     pbdev->msix.table_bar = table & PCI_MSIX_FLAGS_BIRMASK;
 751     pbdev->msix.table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK;
 752     pbdev->msix.pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK;
 753     pbdev->msix.pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK;
 754     pbdev->msix.entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1;
 755     pbdev->msix.available = true;
 756
 757     name = g_strdup_printf("msix-s390-%04x", pbdev->uid);
 758     memory_region_init_io(&pbdev->msix_notify_mr, OBJECT(pbdev),
 759                           &s390_msi_ctrl_ops, pbdev, name, PAGE_SIZE);
 760     memory_region_add_subregion(&pbdev->iommu->mr, ZPCI_MSI_ADDR,
 761                                 &pbdev->msix_notify_mr);
 762     g_free(name);
 763
 764     return 0;
 765 }
 766
 767 static void s390_pci_msix_free(S390PCIBusDevice *pbdev)
 768 {
 769     memory_region_del_subregion(&pbdev->iommu->mr, &pbdev->msix_notify_mr);
 770     object_unparent(OBJECT(&pbdev->msix_notify_mr));
 771 }
 772
 773 static S390PCIBusDevice *s390_pci_device_new(S390pciState *s,
 774                                              const char *target)
 775 {
 776     DeviceState *dev = NULL;
 777
 778     dev = qdev_try_create(BUS(s->bus), TYPE_S390_PCI_DEVICE);
 779     if (!dev) {
 780         return NULL;
 781     }
 782
 783     qdev_prop_set_string(dev, "target", target);
 784     qdev_init_nofail(dev);
 785
 786     return S390_PCI_DEVICE(dev);
 787 }
 788
 789 static bool s390_pci_alloc_idx(S390pciState *s, S390PCIBusDevice *pbdev)
 790 {
 791     uint32_t idx;
 792
 793     idx = s->next_idx;
 794     while (s390_pci_find_dev_by_idx(s, idx)) {
 795         idx = (idx + 1) & FH_MASK_INDEX;
 796         if (idx == s->next_idx) {
 797             return false;
 798         }
 799     }
 800
 801     pbdev->idx = idx;
 802     s->next_idx = (idx + 1) & FH_MASK_INDEX;
 803
 804     return true;
 805 }
 806
 807 static void s390_pcihost_hot_plug(HotplugHandler *hotplug_dev,
 808                                   DeviceState *dev, Error **errp)
 809 {
 810     PCIDevice *pdev = NULL;
 811     S390PCIBusDevice *pbdev = NULL;
 812     S390pciState *s = s390_get_phb();
 813
 814     if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) {
 815         BusState *bus;
 816         PCIBridge *pb = PCI_BRIDGE(dev);
 817         PCIDevice *pdev = PCI_DEVICE(dev);
 818
 819         pci_bridge_map_irq(pb, dev->id, s390_pci_map_irq);
 820         pci_setup_iommu(&pb->sec_bus, s390_pci_dma_iommu, s);
 821
 822         bus = BUS(&pb->sec_bus);
 823         qbus_set_hotplug_handler(bus, DEVICE(s), errp);
 824
 825         if (dev->hotplugged) {
 826             pci_default_write_config(pdev, PCI_PRIMARY_BUS, s->bus_no, 1);
 827             s->bus_no += 1;
 828             pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1);
 829             do {
 830                 pdev = pci_get_bus(pdev)->parent_dev;
 831                 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS,
 832                                          s->bus_no, 1);
 833             } while (pci_get_bus(pdev) && pci_dev_bus_num(pdev));
 834         }
 835     } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 836         pdev = PCI_DEVICE(dev);
 837
 838         if (!dev->id) {
 839             /* In the case the PCI device does not define an id */
 840             /* we generate one based on the PCI address         */
 841             dev->id = g_strdup_printf("auto_%02x:%02x.%01x",
 842                                       pci_dev_bus_num(pdev),
 843                                       PCI_SLOT(pdev->devfn),
 844                                       PCI_FUNC(pdev->devfn));
 845         }
 846
 847         pbdev = s390_pci_find_dev_by_target(s, dev->id);
 848         if (!pbdev) {
 849             pbdev = s390_pci_device_new(s, dev->id);
 850             if (!pbdev) {
 851                 error_setg(errp, "create zpci device failed");
 852                 return;
 853             }
 854         }
 855
 856         if (object_dynamic_cast(OBJECT(dev), "vfio-pci")) {
 857             pbdev->fh |= FH_SHM_VFIO;
 858         } else {
 859             pbdev->fh |= FH_SHM_EMUL;
 860         }
 861
 862         pbdev->pdev = pdev;
 863         pbdev->iommu = s390_pci_get_iommu(s, pci_get_bus(pdev), pdev->devfn);
 864         pbdev->iommu->pbdev = pbdev;
 865         pbdev->state = ZPCI_FS_DISABLED;
 866
 867         if (s390_pci_msix_init(pbdev)) {
 868             error_setg(errp, "MSI-X support is mandatory "
 869                        "in the S390 architecture");
 870             return;
 871         }
 872
 873         if (dev->hotplugged) {
 874             s390_pci_generate_plug_event(HP_EVENT_RESERVED_TO_STANDBY,
 875                                          pbdev->fh, pbdev->fid);
 876         }
 877     } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) {
 878         pbdev = S390_PCI_DEVICE(dev);
 879
 880         if (!s390_pci_alloc_idx(s, pbdev)) {
 881             error_setg(errp, "no slot for plugging zpci device");
 882             return;
 883         }
 884         pbdev->fh = pbdev->idx;
 885         QTAILQ_INSERT_TAIL(&s->zpci_devs, pbdev, link);
 886         g_hash_table_insert(s->zpci_table, &pbdev->idx, pbdev);
 887     }
 888 }
 889
 890 static void s390_pcihost_timer_cb(void *opaque)
 891 {
 892     S390PCIBusDevice *pbdev = opaque;
 893
 894     if (pbdev->summary_ind) {
 895         pci_dereg_irqs(pbdev);
 896     }
 897     if (pbdev->iommu->enabled) {
 898         pci_dereg_ioat(pbdev->iommu);
 899     }
 900
 901     pbdev->state = ZPCI_FS_STANDBY;
 902     s390_pci_generate_plug_event(HP_EVENT_CONFIGURED_TO_STBRES,
 903                                  pbdev->fh, pbdev->fid);
 904     qdev_unplug(DEVICE(pbdev), NULL);
 905 }
 906
 907 static void s390_pcihost_hot_unplug(HotplugHandler *hotplug_dev,
 908                                     DeviceState *dev, Error **errp)
 909 {
 910     PCIDevice *pci_dev = NULL;
 911     PCIBus *bus;
 912     int32_t devfn;
 913     S390PCIBusDevice *pbdev = NULL;
 914     S390pciState *s = s390_get_phb();
 915
 916     if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) {
 917         error_setg(errp, "PCI bridge hot unplug currently not supported");
 918         return;
 919     } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) {
 920         pci_dev = PCI_DEVICE(dev);
 921
 922         QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) {
 923             if (pbdev->pdev == pci_dev) {
 924                 break;
 925             }
 926         }
 927         assert(pbdev != NULL);
 928     } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) {
 929         pbdev = S390_PCI_DEVICE(dev);
 930         pci_dev = pbdev->pdev;
 931     }
 932
 933     switch (pbdev->state) {
 934     case ZPCI_FS_RESERVED:
 935         goto out;
 936     case ZPCI_FS_STANDBY:
 937         break;
 938     default:
 939         s390_pci_generate_plug_event(HP_EVENT_DECONFIGURE_REQUEST,
 940                                      pbdev->fh, pbdev->fid);
 941         pbdev->release_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
 942                                             s390_pcihost_timer_cb,
 943                                             pbdev);
 944         timer_mod(pbdev->release_timer,
 945                   qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + HOT_UNPLUG_TIMEOUT);
 946         return;
 947     }
 948
 949     if (pbdev->release_timer && timer_pending(pbdev->release_timer)) {
 950         timer_del(pbdev->release_timer);
 951         timer_free(pbdev->release_timer);
 952         pbdev->release_timer = NULL;
 953     }
 954
 955     s390_pci_generate_plug_event(HP_EVENT_STANDBY_TO_RESERVED,
 956                                  pbdev->fh, pbdev->fid);
 957     bus = pci_get_bus(pci_dev);
 958     devfn = pci_dev->devfn;
 959     object_unparent(OBJECT(pci_dev));
 960     s390_pci_msix_free(pbdev);
 961     s390_pci_iommu_free(s, bus, devfn);
 962     pbdev->pdev = NULL;
 963     pbdev->state = ZPCI_FS_RESERVED;
 964 out:
 965     pbdev->fid = 0;
 966     QTAILQ_REMOVE(&s->zpci_devs, pbdev, link);
 967     g_hash_table_remove(s->zpci_table, &pbdev->idx);
 968     object_unparent(OBJECT(pbdev));
 969 }
 970
 971 static void s390_pci_enumerate_bridge(PCIBus *bus, PCIDevice *pdev,
 972                                       void *opaque)
 973 {
 974     S390pciState *s = opaque;
 975     unsigned int primary = s->bus_no;
 976     unsigned int subordinate = 0xff;
 977     PCIBus *sec_bus = NULL;
 978
 979     if ((pci_default_read_config(pdev, PCI_HEADER_TYPE, 1) !=
 980          PCI_HEADER_TYPE_BRIDGE)) {
 981         return;
 982     }
 983
 984     (s->bus_no)++;
 985     pci_default_write_config(pdev, PCI_PRIMARY_BUS, primary, 1);
 986     pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1);
 987     pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1);
 988
 989     sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev));
 990     if (!sec_bus) {
 991         return;
 992     }
 993
 994     pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, subordinate, 1);
 995     pci_for_each_device(sec_bus, pci_bus_num(sec_bus),
 996                         s390_pci_enumerate_bridge, s);
 997     pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1);
 998 }
 999
1000 static void s390_pcihost_reset(DeviceState *dev)
1001 {
1002     S390pciState *s = S390_PCI_HOST_BRIDGE(dev);
1003     PCIBus *bus = s->parent_obj.bus;
1004
1005     s->bus_no = 0;
1006     pci_for_each_device(bus, pci_bus_num(bus), s390_pci_enumerate_bridge, s);
1007 }
1008
1009 static void s390_pcihost_class_init(ObjectClass *klass, void *data)
1010 {
1011     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
1012     DeviceClass *dc = DEVICE_CLASS(klass);
1013     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
1014
1015     dc->reset = s390_pcihost_reset;
1016     k->init = s390_pcihost_init;
1017     hc->plug = s390_pcihost_hot_plug;
1018     hc->unplug = s390_pcihost_hot_unplug;
1019     msi_nonbroken = true;
1020 }
1021
1022 static const TypeInfo s390_pcihost_info = {
1023     .name          = TYPE_S390_PCI_HOST_BRIDGE,
1024     .parent        = TYPE_PCI_HOST_BRIDGE,
1025     .instance_size = sizeof(S390pciState),
1026     .class_init    = s390_pcihost_class_init,
1027     .interfaces = (InterfaceInfo[]) {
1028         { TYPE_HOTPLUG_HANDLER },
1029         { }
1030     }
1031 };
1032
1033 static const TypeInfo s390_pcibus_info = {
1034     .name = TYPE_S390_PCI_BUS,
1035     .parent = TYPE_BUS,
1036     .instance_size = sizeof(S390PCIBus),
1037 };
1038
1039 static uint16_t s390_pci_generate_uid(S390pciState *s)
1040 {
1041     uint16_t uid = 0;
1042
1043     do {
1044         uid++;
1045         if (!s390_pci_find_dev_by_uid(s, uid)) {
1046             return uid;
1047         }
1048     } while (uid < ZPCI_MAX_UID);
1049
1050     return UID_UNDEFINED;
1051 }
1052
1053 static uint32_t s390_pci_generate_fid(S390pciState *s, Error **errp)
1054 {
1055     uint32_t fid = 0;
1056
1057     do {
1058         if (!s390_pci_find_dev_by_fid(s, fid)) {
1059             return fid;
1060         }
1061     } while (fid++ != ZPCI_MAX_FID);
1062
1063     error_setg(errp, "no free fid could be found");
1064     return 0;
1065 }
1066
1067 static void s390_pci_device_realize(DeviceState *dev, Error **errp)
1068 {
1069     S390PCIBusDevice *zpci = S390_PCI_DEVICE(dev);
1070     S390pciState *s = s390_get_phb();
1071
1072     if (!zpci->target) {
1073         error_setg(errp, "target must be defined");
1074         return;
1075     }
1076
1077     if (s390_pci_find_dev_by_target(s, zpci->target)) {
1078         error_setg(errp, "target %s already has an associated zpci device",
1079                    zpci->target);
1080         return;
1081     }
1082
1083     if (zpci->uid == UID_UNDEFINED) {
1084         zpci->uid = s390_pci_generate_uid(s);
1085         if (!zpci->uid) {
1086             error_setg(errp, "no free uid could be found");
1087             return;
1088         }
1089     } else if (s390_pci_find_dev_by_uid(s, zpci->uid)) {
1090         error_setg(errp, "uid %u already in use", zpci->uid);
1091         return;
1092     }
1093
1094     if (!zpci->fid_defined) {
1095         Error *local_error = NULL;
1096
1097         zpci->fid = s390_pci_generate_fid(s, &local_error);
1098         if (local_error) {
1099             error_propagate(errp, local_error);
1100             return;
1101         }
1102     } else if (s390_pci_find_dev_by_fid(s, zpci->fid)) {
1103         error_setg(errp, "fid %u already in use", zpci->fid);
1104         return;
1105     }
1106
1107     zpci->state = ZPCI_FS_RESERVED;
1108 }
1109
1110 static void s390_pci_device_reset(DeviceState *dev)
1111 {
1112     S390PCIBusDevice *pbdev = S390_PCI_DEVICE(dev);
1113
1114     switch (pbdev->state) {
1115     case ZPCI_FS_RESERVED:
1116         return;
1117     case ZPCI_FS_STANDBY:
1118         break;
1119     default:
1120         pbdev->fh &= ~FH_MASK_ENABLE;
1121         pbdev->state = ZPCI_FS_DISABLED;
1122         break;
1123     }
1124
1125     if (pbdev->summary_ind) {
1126         pci_dereg_irqs(pbdev);
1127     }
1128     if (pbdev->iommu->enabled) {
1129         pci_dereg_ioat(pbdev->iommu);
1130     }
1131
1132     pbdev->fmb_addr = 0;
1133 }
1134
1135 static void s390_pci_get_fid(Object *obj, Visitor *v, const char *name,
1136                          void *opaque, Error **errp)
1137 {
1138     Property *prop = opaque;
1139     uint32_t *ptr = qdev_get_prop_ptr(DEVICE(obj), prop);
1140
1141     visit_type_uint32(v, name, ptr, errp);
1142 }
1143
1144 static void s390_pci_set_fid(Object *obj, Visitor *v, const char *name,
1145                          void *opaque, Error **errp)
1146 {
1147     DeviceState *dev = DEVICE(obj);
1148     S390PCIBusDevice *zpci = S390_PCI_DEVICE(obj);
1149     Property *prop = opaque;
1150     uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
1151
1152     if (dev->realized) {
1153         qdev_prop_set_after_realize(dev, name, errp);
1154         return;
1155     }
1156
1157     visit_type_uint32(v, name, ptr, errp);
1158     zpci->fid_defined = true;
1159 }
1160
1161 static const PropertyInfo s390_pci_fid_propinfo = {
1162     .name = "zpci_fid",
1163     .get = s390_pci_get_fid,
1164     .set = s390_pci_set_fid,
1165 };
1166
1167 #define DEFINE_PROP_S390_PCI_FID(_n, _s, _f) \
1168     DEFINE_PROP(_n, _s, _f, s390_pci_fid_propinfo, uint32_t)
1169
1170 static Property s390_pci_device_properties[] = {
1171     DEFINE_PROP_UINT16("uid", S390PCIBusDevice, uid, UID_UNDEFINED),
1172     DEFINE_PROP_S390_PCI_FID("fid", S390PCIBusDevice, fid),
1173     DEFINE_PROP_STRING("target", S390PCIBusDevice, target),
1174     DEFINE_PROP_END_OF_LIST(),
1175 };
1176
1177 static void s390_pci_device_class_init(ObjectClass *klass, void *data)
1178 {
1179     DeviceClass *dc = DEVICE_CLASS(klass);
1180
1181     dc->desc = "zpci device";
1182     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1183     dc->reset = s390_pci_device_reset;
1184     dc->bus_type = TYPE_S390_PCI_BUS;
1185     dc->realize = s390_pci_device_realize;
1186     dc->props = s390_pci_device_properties;
1187 }
1188
1189 static const TypeInfo s390_pci_device_info = {
1190     .name = TYPE_S390_PCI_DEVICE,
1191     .parent = TYPE_DEVICE,
1192     .instance_size = sizeof(S390PCIBusDevice),
1193     .class_init = s390_pci_device_class_init,
1194 };
1195
1196 static TypeInfo s390_pci_iommu_info = {
1197     .name = TYPE_S390_PCI_IOMMU,
1198     .parent = TYPE_OBJECT,
1199     .instance_size = sizeof(S390PCIIOMMU),
1200 };
1201
1202 static void s390_iommu_memory_region_class_init(ObjectClass *klass, void *data)
1203 {
1204     IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
1205
1206     imrc->translate = s390_translate_iommu;
1207     imrc->replay = s390_pci_iommu_replay;
1208 }
1209
1210 static const TypeInfo s390_iommu_memory_region_info = {
1211     .parent = TYPE_IOMMU_MEMORY_REGION,
1212     .name = TYPE_S390_IOMMU_MEMORY_REGION,
1213     .class_init = s390_iommu_memory_region_class_init,
1214 };
1215
1216 static void s390_pci_register_types(void)
1217 {
1218     type_register_static(&s390_pcihost_info);
1219     type_register_static(&s390_pcibus_info);
1220     type_register_static(&s390_pci_device_info);
1221     type_register_static(&s390_pci_iommu_info);
1222     type_register_static(&s390_iommu_memory_region_info);
1223 }
1224
1225 type_init(s390_pci_register_types)