hw/s390x/s390-pci-inst.c

   1 /*
   2  * s390 PCI instructions
   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 "cpu.h"
  16 #include "exec/memop.h"
  17 #include "exec/memory-internal.h"
  18 #include "qemu/error-report.h"
  19 #include "sysemu/hw_accel.h"
  20 #include "hw/s390x/s390-pci-inst.h"
  21 #include "hw/s390x/s390-pci-bus.h"
  22 #include "hw/s390x/tod.h"
  23
  24 #ifndef DEBUG_S390PCI_INST
  25 #define DEBUG_S390PCI_INST  0
  26 #endif
  27
  28 #define DPRINTF(fmt, ...)                                          \
  29     do {                                                           \
  30         if (DEBUG_S390PCI_INST) {                                  \
  31             fprintf(stderr, "s390pci-inst: " fmt, ## __VA_ARGS__); \
  32         }                                                          \
  33     } while (0)
  34
  35 static inline void inc_dma_avail(S390PCIIOMMU *iommu)
  36 {
  37     if (iommu->dma_limit) {
  38         iommu->dma_limit->avail++;
  39     }
  40 }
  41
  42 static inline void dec_dma_avail(S390PCIIOMMU *iommu)
  43 {
  44     if (iommu->dma_limit) {
  45         iommu->dma_limit->avail--;
  46     }
  47 }
  48
  49 static void s390_set_status_code(CPUS390XState *env,
  50                                  uint8_t r, uint64_t status_code)
  51 {
  52     env->regs[r] &= ~0xff000000ULL;
  53     env->regs[r] |= (status_code & 0xff) << 24;
  54 }
  55
  56 static int list_pci(ClpReqRspListPci *rrb, uint8_t *cc)
  57 {
  58     S390PCIBusDevice *pbdev = NULL;
  59     S390pciState *s = s390_get_phb();
  60     uint32_t res_code, initial_l2, g_l2;
  61     int rc, i;
  62     uint64_t resume_token;
  63
  64     rc = 0;
  65     if (lduw_p(&rrb->request.hdr.len) != 32) {
  66         res_code = CLP_RC_LEN;
  67         rc = -EINVAL;
  68         goto out;
  69     }
  70
  71     if ((ldl_p(&rrb->request.fmt) & CLP_MASK_FMT) != 0) {
  72         res_code = CLP_RC_FMT;
  73         rc = -EINVAL;
  74         goto out;
  75     }
  76
  77     if ((ldl_p(&rrb->request.fmt) & ~CLP_MASK_FMT) != 0 ||
  78         ldq_p(&rrb->request.reserved1) != 0) {
  79         res_code = CLP_RC_RESNOT0;
  80         rc = -EINVAL;
  81         goto out;
  82     }
  83
  84     resume_token = ldq_p(&rrb->request.resume_token);
  85
  86     if (resume_token) {
  87         pbdev = s390_pci_find_dev_by_idx(s, resume_token);
  88         if (!pbdev) {
  89             res_code = CLP_RC_LISTPCI_BADRT;
  90             rc = -EINVAL;
  91             goto out;
  92         }
  93     } else {
  94         pbdev = s390_pci_find_next_avail_dev(s, NULL);
  95     }
  96
  97     if (lduw_p(&rrb->response.hdr.len) < 48) {
  98         res_code = CLP_RC_8K;
  99         rc = -EINVAL;
 100         goto out;
 101     }
 102
 103     initial_l2 = lduw_p(&rrb->response.hdr.len);
 104     if ((initial_l2 - LIST_PCI_HDR_LEN) % sizeof(ClpFhListEntry)
 105         != 0) {
 106         res_code = CLP_RC_LEN;
 107         rc = -EINVAL;
 108         *cc = 3;
 109         goto out;
 110     }
 111
 112     stl_p(&rrb->response.fmt, 0);
 113     stq_p(&rrb->response.reserved1, 0);
 114     stl_p(&rrb->response.mdd, FH_MASK_SHM);
 115     stw_p(&rrb->response.max_fn, PCI_MAX_FUNCTIONS);
 116     rrb->response.flags = UID_CHECKING_ENABLED;
 117     rrb->response.entry_size = sizeof(ClpFhListEntry);
 118
 119     i = 0;
 120     g_l2 = LIST_PCI_HDR_LEN;
 121     while (g_l2 < initial_l2 && pbdev) {
 122         stw_p(&rrb->response.fh_list[i].device_id,
 123             pci_get_word(pbdev->pdev->config + PCI_DEVICE_ID));
 124         stw_p(&rrb->response.fh_list[i].vendor_id,
 125             pci_get_word(pbdev->pdev->config + PCI_VENDOR_ID));
 126         /* Ignore RESERVED devices. */
 127         stl_p(&rrb->response.fh_list[i].config,
 128             pbdev->state == ZPCI_FS_STANDBY ? 0 : 1 << 31);
 129         stl_p(&rrb->response.fh_list[i].fid, pbdev->fid);
 130         stl_p(&rrb->response.fh_list[i].fh, pbdev->fh);
 131
 132         g_l2 += sizeof(ClpFhListEntry);
 133         /* Add endian check for DPRINTF? */
 134         DPRINTF("g_l2 %d vendor id 0x%x device id 0x%x fid 0x%x fh 0x%x\n",
 135                 g_l2,
 136                 lduw_p(&rrb->response.fh_list[i].vendor_id),
 137                 lduw_p(&rrb->response.fh_list[i].device_id),
 138                 ldl_p(&rrb->response.fh_list[i].fid),
 139                 ldl_p(&rrb->response.fh_list[i].fh));
 140         pbdev = s390_pci_find_next_avail_dev(s, pbdev);
 141         i++;
 142     }
 143
 144     if (!pbdev) {
 145         resume_token = 0;
 146     } else {
 147         resume_token = pbdev->fh & FH_MASK_INDEX;
 148     }
 149     stq_p(&rrb->response.resume_token, resume_token);
 150     stw_p(&rrb->response.hdr.len, g_l2);
 151     stw_p(&rrb->response.hdr.rsp, CLP_RC_OK);
 152 out:
 153     if (rc) {
 154         DPRINTF("list pci failed rc 0x%x\n", rc);
 155         stw_p(&rrb->response.hdr.rsp, res_code);
 156     }
 157     return rc;
 158 }
 159
 160 int clp_service_call(S390CPU *cpu, uint8_t r2, uintptr_t ra)
 161 {
 162     ClpReqHdr *reqh;
 163     ClpRspHdr *resh;
 164     S390PCIBusDevice *pbdev;
 165     uint32_t req_len;
 166     uint32_t res_len;
 167     uint8_t buffer[4096 * 2];
 168     uint8_t cc = 0;
 169     CPUS390XState *env = &cpu->env;
 170     S390pciState *s = s390_get_phb();
 171     int i;
 172
 173     if (env->psw.mask & PSW_MASK_PSTATE) {
 174         s390_program_interrupt(env, PGM_PRIVILEGED, ra);
 175         return 0;
 176     }
 177
 178     if (s390_cpu_virt_mem_read(cpu, env->regs[r2], r2, buffer, sizeof(*reqh))) {
 179         s390_cpu_virt_mem_handle_exc(cpu, ra);
 180         return 0;
 181     }
 182     reqh = (ClpReqHdr *)buffer;
 183     req_len = lduw_p(&reqh->len);
 184     if (req_len < 16 || req_len > 8184 || (req_len % 8 != 0)) {
 185         s390_program_interrupt(env, PGM_OPERAND, ra);
 186         return 0;
 187     }
 188
 189     if (s390_cpu_virt_mem_read(cpu, env->regs[r2], r2, buffer,
 190                                req_len + sizeof(*resh))) {
 191         s390_cpu_virt_mem_handle_exc(cpu, ra);
 192         return 0;
 193     }
 194     resh = (ClpRspHdr *)(buffer + req_len);
 195     res_len = lduw_p(&resh->len);
 196     if (res_len < 8 || res_len > 8176 || (res_len % 8 != 0)) {
 197         s390_program_interrupt(env, PGM_OPERAND, ra);
 198         return 0;
 199     }
 200     if ((req_len + res_len) > 8192) {
 201         s390_program_interrupt(env, PGM_OPERAND, ra);
 202         return 0;
 203     }
 204
 205     if (s390_cpu_virt_mem_read(cpu, env->regs[r2], r2, buffer,
 206                                req_len + res_len)) {
 207         s390_cpu_virt_mem_handle_exc(cpu, ra);
 208         return 0;
 209     }
 210
 211     if (req_len != 32) {
 212         stw_p(&resh->rsp, CLP_RC_LEN);
 213         goto out;
 214     }
 215
 216     switch (lduw_p(&reqh->cmd)) {
 217     case CLP_LIST_PCI: {
 218         ClpReqRspListPci *rrb = (ClpReqRspListPci *)buffer;
 219         list_pci(rrb, &cc);
 220         break;
 221     }
 222     case CLP_SET_PCI_FN: {
 223         ClpReqSetPci *reqsetpci = (ClpReqSetPci *)reqh;
 224         ClpRspSetPci *ressetpci = (ClpRspSetPci *)resh;
 225
 226         pbdev = s390_pci_find_dev_by_fh(s, ldl_p(&reqsetpci->fh));
 227         if (!pbdev) {
 228                 stw_p(&ressetpci->hdr.rsp, CLP_RC_SETPCIFN_FH);
 229                 goto out;
 230         }
 231
 232         switch (reqsetpci->oc) {
 233         case CLP_SET_ENABLE_PCI_FN:
 234             switch (reqsetpci->ndas) {
 235             case 0:
 236                 stw_p(&ressetpci->hdr.rsp, CLP_RC_SETPCIFN_DMAAS);
 237                 goto out;
 238             case 1:
 239                 break;
 240             default:
 241                 stw_p(&ressetpci->hdr.rsp, CLP_RC_SETPCIFN_RES);
 242                 goto out;
 243             }
 244
 245             if (pbdev->fh & FH_MASK_ENABLE) {
 246                 stw_p(&ressetpci->hdr.rsp, CLP_RC_SETPCIFN_FHOP);
 247                 goto out;
 248             }
 249
 250             pbdev->fh |= FH_MASK_ENABLE;
 251             pbdev->state = ZPCI_FS_ENABLED;
 252             stl_p(&ressetpci->fh, pbdev->fh);
 253             stw_p(&ressetpci->hdr.rsp, CLP_RC_OK);
 254             break;
 255         case CLP_SET_DISABLE_PCI_FN:
 256             if (!(pbdev->fh & FH_MASK_ENABLE)) {
 257                 stw_p(&ressetpci->hdr.rsp, CLP_RC_SETPCIFN_FHOP);
 258                 goto out;
 259             }
 260             device_legacy_reset(DEVICE(pbdev));
 261             pbdev->fh &= ~FH_MASK_ENABLE;
 262             pbdev->state = ZPCI_FS_DISABLED;
 263             stl_p(&ressetpci->fh, pbdev->fh);
 264             stw_p(&ressetpci->hdr.rsp, CLP_RC_OK);
 265             break;
 266         default:
 267             DPRINTF("unknown set pci command\n");
 268             stw_p(&ressetpci->hdr.rsp, CLP_RC_SETPCIFN_FHOP);
 269             break;
 270         }
 271         break;
 272     }
 273     case CLP_QUERY_PCI_FN: {
 274         ClpReqQueryPci *reqquery = (ClpReqQueryPci *)reqh;
 275         ClpRspQueryPci *resquery = (ClpRspQueryPci *)resh;
 276
 277         pbdev = s390_pci_find_dev_by_fh(s, ldl_p(&reqquery->fh));
 278         if (!pbdev) {
 279             DPRINTF("query pci no pci dev\n");
 280             stw_p(&resquery->hdr.rsp, CLP_RC_SETPCIFN_FH);
 281             goto out;
 282         }
 283
 284         stq_p(&resquery->sdma, pbdev->zpci_fn.sdma);
 285         stq_p(&resquery->edma, pbdev->zpci_fn.edma);
 286         stw_p(&resquery->pchid, pbdev->zpci_fn.pchid);
 287         resquery->flags = pbdev->zpci_fn.flags;
 288         resquery->pfgid = pbdev->zpci_fn.pfgid;
 289         stl_p(&resquery->fid, pbdev->zpci_fn.fid);
 290         stl_p(&resquery->uid, pbdev->zpci_fn.uid);
 291
 292         for (i = 0; i < PCI_BAR_COUNT; i++) {
 293             uint32_t data = pci_get_long(pbdev->pdev->config +
 294                 PCI_BASE_ADDRESS_0 + (i * 4));
 295
 296             stl_p(&resquery->bar[i], data);
 297             resquery->bar_size[i] = pbdev->pdev->io_regions[i].size ?
 298                                     ctz64(pbdev->pdev->io_regions[i].size) : 0;
 299             DPRINTF("bar %d addr 0x%x size 0x%" PRIx64 "barsize 0x%x\n", i,
 300                     ldl_p(&resquery->bar[i]),
 301                     pbdev->pdev->io_regions[i].size,
 302                     resquery->bar_size[i]);
 303         }
 304
 305         stw_p(&resquery->hdr.rsp, CLP_RC_OK);
 306         break;
 307     }
 308     case CLP_QUERY_PCI_FNGRP: {
 309         ClpRspQueryPciGrp *resgrp = (ClpRspQueryPciGrp *)resh;
 310
 311         ClpReqQueryPciGrp *reqgrp = (ClpReqQueryPciGrp *)reqh;
 312         S390PCIGroup *group;
 313
 314         group = s390_group_find(reqgrp->g);
 315         if (!group) {
 316             /* We do not allow access to unknown groups */
 317             /* The group must have been obtained with a vfio device */
 318             stw_p(&resgrp->hdr.rsp, CLP_RC_QUERYPCIFG_PFGID);
 319             goto out;
 320         }
 321         resgrp->fr = group->zpci_group.fr;
 322         stq_p(&resgrp->dasm, group->zpci_group.dasm);
 323         stq_p(&resgrp->msia, group->zpci_group.msia);
 324         stw_p(&resgrp->mui, group->zpci_group.mui);
 325         stw_p(&resgrp->i, group->zpci_group.i);
 326         stw_p(&resgrp->maxstbl, group->zpci_group.maxstbl);
 327         resgrp->version = group->zpci_group.version;
 328         stw_p(&resgrp->hdr.rsp, CLP_RC_OK);
 329         break;
 330     }
 331     default:
 332         DPRINTF("unknown clp command\n");
 333         stw_p(&resh->rsp, CLP_RC_CMD);
 334         break;
 335     }
 336
 337 out:
 338     if (s390_cpu_virt_mem_write(cpu, env->regs[r2], r2, buffer,
 339                                 req_len + res_len)) {
 340         s390_cpu_virt_mem_handle_exc(cpu, ra);
 341         return 0;
 342     }
 343     setcc(cpu, cc);
 344     return 0;
 345 }
 346
 347 /**
 348  * Swap data contained in s390x big endian registers to little endian
 349  * PCI bars.
 350  *
 351  * @ptr: a pointer to a uint64_t data field
 352  * @len: the length of the valid data, must be 1,2,4 or 8
 353  */
 354 static int zpci_endian_swap(uint64_t *ptr, uint8_t len)
 355 {
 356     uint64_t data = *ptr;
 357
 358     switch (len) {
 359     case 1:
 360         break;
 361     case 2:
 362         data = bswap16(data);
 363         break;
 364     case 4:
 365         data = bswap32(data);
 366         break;
 367     case 8:
 368         data = bswap64(data);
 369         break;
 370     default:
 371         return -EINVAL;
 372     }
 373     *ptr = data;
 374     return 0;
 375 }
 376
 377 static MemoryRegion *s390_get_subregion(MemoryRegion *mr, uint64_t offset,
 378                                         uint8_t len)
 379 {
 380     MemoryRegion *subregion;
 381     uint64_t subregion_size;
 382
 383     QTAILQ_FOREACH(subregion, &mr->subregions, subregions_link) {
 384         subregion_size = int128_get64(subregion->size);
 385         if ((offset >= subregion->addr) &&
 386             (offset + len) <= (subregion->addr + subregion_size)) {
 387             mr = subregion;
 388             break;
 389         }
 390     }
 391     return mr;
 392 }
 393
 394 static MemTxResult zpci_read_bar(S390PCIBusDevice *pbdev, uint8_t pcias,
 395                                  uint64_t offset, uint64_t *data, uint8_t len)
 396 {
 397     MemoryRegion *mr;
 398
 399     mr = pbdev->pdev->io_regions[pcias].memory;
 400     mr = s390_get_subregion(mr, offset, len);
 401     offset -= mr->addr;
 402     return memory_region_dispatch_read(mr, offset, data,
 403                                        size_memop(len) | MO_BE,
 404                                        MEMTXATTRS_UNSPECIFIED);
 405 }
 406
 407 int pcilg_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
 408 {
 409     CPUS390XState *env = &cpu->env;
 410     S390PCIBusDevice *pbdev;
 411     uint64_t offset;
 412     uint64_t data;
 413     MemTxResult result;
 414     uint8_t len;
 415     uint32_t fh;
 416     uint8_t pcias;
 417
 418     if (env->psw.mask & PSW_MASK_PSTATE) {
 419         s390_program_interrupt(env, PGM_PRIVILEGED, ra);
 420         return 0;
 421     }
 422
 423     if (r2 & 0x1) {
 424         s390_program_interrupt(env, PGM_SPECIFICATION, ra);
 425         return 0;
 426     }
 427
 428     fh = env->regs[r2] >> 32;
 429     pcias = (env->regs[r2] >> 16) & 0xf;
 430     len = env->regs[r2] & 0xf;
 431     offset = env->regs[r2 + 1];
 432
 433     if (!(fh & FH_MASK_ENABLE)) {
 434         setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
 435         return 0;
 436     }
 437
 438     pbdev = s390_pci_find_dev_by_fh(s390_get_phb(), fh);
 439     if (!pbdev) {
 440         DPRINTF("pcilg no pci dev\n");
 441         setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
 442         return 0;
 443     }
 444
 445     switch (pbdev->state) {
 446     case ZPCI_FS_PERMANENT_ERROR:
 447     case ZPCI_FS_ERROR:
 448         setcc(cpu, ZPCI_PCI_LS_ERR);
 449         s390_set_status_code(env, r2, ZPCI_PCI_ST_BLOCKED);
 450         return 0;
 451     default:
 452         break;
 453     }
 454
 455     switch (pcias) {
 456     case ZPCI_IO_BAR_MIN...ZPCI_IO_BAR_MAX:
 457         if (!len || (len > (8 - (offset & 0x7)))) {
 458             s390_program_interrupt(env, PGM_OPERAND, ra);
 459             return 0;
 460         }
 461         result = zpci_read_bar(pbdev, pcias, offset, &data, len);
 462         if (result != MEMTX_OK) {
 463             s390_program_interrupt(env, PGM_OPERAND, ra);
 464             return 0;
 465         }
 466         break;
 467     case ZPCI_CONFIG_BAR:
 468         if (!len || (len > (4 - (offset & 0x3))) || len == 3) {
 469             s390_program_interrupt(env, PGM_OPERAND, ra);
 470             return 0;
 471         }
 472         data =  pci_host_config_read_common(
 473                    pbdev->pdev, offset, pci_config_size(pbdev->pdev), len);
 474
 475         if (zpci_endian_swap(&data, len)) {
 476             s390_program_interrupt(env, PGM_OPERAND, ra);
 477             return 0;
 478         }
 479         break;
 480     default:
 481         DPRINTF("pcilg invalid space\n");
 482         setcc(cpu, ZPCI_PCI_LS_ERR);
 483         s390_set_status_code(env, r2, ZPCI_PCI_ST_INVAL_AS);
 484         return 0;
 485     }
 486
 487     pbdev->fmb.counter[ZPCI_FMB_CNT_LD]++;
 488
 489     env->regs[r1] = data;
 490     setcc(cpu, ZPCI_PCI_LS_OK);
 491     return 0;
 492 }
 493
 494 static MemTxResult zpci_write_bar(S390PCIBusDevice *pbdev, uint8_t pcias,
 495                                   uint64_t offset, uint64_t data, uint8_t len)
 496 {
 497     MemoryRegion *mr;
 498
 499     mr = pbdev->pdev->io_regions[pcias].memory;
 500     mr = s390_get_subregion(mr, offset, len);
 501     offset -= mr->addr;
 502     return memory_region_dispatch_write(mr, offset, data,
 503                                         size_memop(len) | MO_BE,
 504                                         MEMTXATTRS_UNSPECIFIED);
 505 }
 506
 507 int pcistg_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
 508 {
 509     CPUS390XState *env = &cpu->env;
 510     uint64_t offset, data;
 511     S390PCIBusDevice *pbdev;
 512     MemTxResult result;
 513     uint8_t len;
 514     uint32_t fh;
 515     uint8_t pcias;
 516
 517     if (env->psw.mask & PSW_MASK_PSTATE) {
 518         s390_program_interrupt(env, PGM_PRIVILEGED, ra);
 519         return 0;
 520     }
 521
 522     if (r2 & 0x1) {
 523         s390_program_interrupt(env, PGM_SPECIFICATION, ra);
 524         return 0;
 525     }
 526
 527     fh = env->regs[r2] >> 32;
 528     pcias = (env->regs[r2] >> 16) & 0xf;
 529     len = env->regs[r2] & 0xf;
 530     offset = env->regs[r2 + 1];
 531     data = env->regs[r1];
 532
 533     if (!(fh & FH_MASK_ENABLE)) {
 534         setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
 535         return 0;
 536     }
 537
 538     pbdev = s390_pci_find_dev_by_fh(s390_get_phb(), fh);
 539     if (!pbdev) {
 540         DPRINTF("pcistg no pci dev\n");
 541         setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
 542         return 0;
 543     }
 544
 545     switch (pbdev->state) {
 546     /* ZPCI_FS_RESERVED, ZPCI_FS_STANDBY and ZPCI_FS_DISABLED
 547      * are already covered by the FH_MASK_ENABLE check above
 548      */
 549     case ZPCI_FS_PERMANENT_ERROR:
 550     case ZPCI_FS_ERROR:
 551         setcc(cpu, ZPCI_PCI_LS_ERR);
 552         s390_set_status_code(env, r2, ZPCI_PCI_ST_BLOCKED);
 553         return 0;
 554     default:
 555         break;
 556     }
 557
 558     switch (pcias) {
 559         /* A ZPCI PCI card may use any BAR from BAR 0 to BAR 5 */
 560     case ZPCI_IO_BAR_MIN...ZPCI_IO_BAR_MAX:
 561         /* Check length:
 562          * A length of 0 is invalid and length should not cross a double word
 563          */
 564         if (!len || (len > (8 - (offset & 0x7)))) {
 565             s390_program_interrupt(env, PGM_OPERAND, ra);
 566             return 0;
 567         }
 568
 569         result = zpci_write_bar(pbdev, pcias, offset, data, len);
 570         if (result != MEMTX_OK) {
 571             s390_program_interrupt(env, PGM_OPERAND, ra);
 572             return 0;
 573         }
 574         break;
 575     case ZPCI_CONFIG_BAR:
 576         /* ZPCI uses the pseudo BAR number 15 as configuration space */
 577         /* possible access lengths are 1,2,4 and must not cross a word */
 578         if (!len || (len > (4 - (offset & 0x3))) || len == 3) {
 579             s390_program_interrupt(env, PGM_OPERAND, ra);
 580             return 0;
 581         }
 582         /* len = 1,2,4 so we do not need to test */
 583         zpci_endian_swap(&data, len);
 584         pci_host_config_write_common(pbdev->pdev, offset,
 585                                      pci_config_size(pbdev->pdev),
 586                                      data, len);
 587         break;
 588     default:
 589         DPRINTF("pcistg invalid space\n");
 590         setcc(cpu, ZPCI_PCI_LS_ERR);
 591         s390_set_status_code(env, r2, ZPCI_PCI_ST_INVAL_AS);
 592         return 0;
 593     }
 594
 595     pbdev->fmb.counter[ZPCI_FMB_CNT_ST]++;
 596
 597     setcc(cpu, ZPCI_PCI_LS_OK);
 598     return 0;
 599 }
 600
 601 static uint32_t s390_pci_update_iotlb(S390PCIIOMMU *iommu,
 602                                       S390IOTLBEntry *entry)
 603 {
 604     S390IOTLBEntry *cache = g_hash_table_lookup(iommu->iotlb, &entry->iova);
 605     IOMMUTLBEvent event = {
 606         .type = entry->perm ? IOMMU_NOTIFIER_MAP : IOMMU_NOTIFIER_UNMAP,
 607         .entry = {
 608             .target_as = &address_space_memory,
 609             .iova = entry->iova,
 610             .translated_addr = entry->translated_addr,
 611             .perm = entry->perm,
 612             .addr_mask = ~PAGE_MASK,
 613         },
 614     };
 615
 616     if (event.type == IOMMU_NOTIFIER_UNMAP) {
 617         if (!cache) {
 618             goto out;
 619         }
 620         g_hash_table_remove(iommu->iotlb, &entry->iova);
 621         inc_dma_avail(iommu);
 622     } else {
 623         if (cache) {
 624             if (cache->perm == entry->perm &&
 625                 cache->translated_addr == entry->translated_addr) {
 626                 goto out;
 627             }
 628
 629             event.type = IOMMU_NOTIFIER_UNMAP;
 630             event.entry.perm = IOMMU_NONE;
 631             memory_region_notify_iommu(&iommu->iommu_mr, 0, event);
 632             event.type = IOMMU_NOTIFIER_MAP;
 633             event.entry.perm = entry->perm;
 634         }
 635
 636         cache = g_new(S390IOTLBEntry, 1);
 637         cache->iova = entry->iova;
 638         cache->translated_addr = entry->translated_addr;
 639         cache->len = PAGE_SIZE;
 640         cache->perm = entry->perm;
 641         g_hash_table_replace(iommu->iotlb, &cache->iova, cache);
 642         dec_dma_avail(iommu);
 643     }
 644
 645     memory_region_notify_iommu(&iommu->iommu_mr, 0, event);
 646
 647 out:
 648     return iommu->dma_limit ? iommu->dma_limit->avail : 1;
 649 }
 650
 651 int rpcit_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2, uintptr_t ra)
 652 {
 653     CPUS390XState *env = &cpu->env;
 654     uint32_t fh;
 655     uint16_t error = 0;
 656     S390PCIBusDevice *pbdev;
 657     S390PCIIOMMU *iommu;
 658     S390IOTLBEntry entry;
 659     hwaddr start, end;
 660     uint32_t dma_avail;
 661
 662     if (env->psw.mask & PSW_MASK_PSTATE) {
 663         s390_program_interrupt(env, PGM_PRIVILEGED, ra);
 664         return 0;
 665     }
 666
 667     if (r2 & 0x1) {
 668         s390_program_interrupt(env, PGM_SPECIFICATION, ra);
 669         return 0;
 670     }
 671
 672     fh = env->regs[r1] >> 32;
 673     start = env->regs[r2];
 674     end = start + env->regs[r2 + 1];
 675
 676     pbdev = s390_pci_find_dev_by_fh(s390_get_phb(), fh);
 677     if (!pbdev) {
 678         DPRINTF("rpcit no pci dev\n");
 679         setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
 680         return 0;
 681     }
 682
 683     switch (pbdev->state) {
 684     case ZPCI_FS_RESERVED:
 685     case ZPCI_FS_STANDBY:
 686     case ZPCI_FS_DISABLED:
 687     case ZPCI_FS_PERMANENT_ERROR:
 688         setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
 689         return 0;
 690     case ZPCI_FS_ERROR:
 691         setcc(cpu, ZPCI_PCI_LS_ERR);
 692         s390_set_status_code(env, r1, ZPCI_MOD_ST_ERROR_RECOVER);
 693         return 0;
 694     default:
 695         break;
 696     }
 697
 698     iommu = pbdev->iommu;
 699     if (iommu->dma_limit) {
 700         dma_avail = iommu->dma_limit->avail;
 701     } else {
 702         dma_avail = 1;
 703     }
 704     if (!iommu->g_iota) {
 705         error = ERR_EVENT_INVALAS;
 706         goto err;
 707     }
 708
 709     if (end < iommu->pba || start > iommu->pal) {
 710         error = ERR_EVENT_OORANGE;
 711         goto err;
 712     }
 713
 714     while (start < end) {
 715         error = s390_guest_io_table_walk(iommu->g_iota, start, &entry);
 716         if (error) {
 717             break;
 718         }
 719
 720         start += entry.len;
 721         while (entry.iova < start && entry.iova < end &&
 722                (dma_avail > 0 || entry.perm == IOMMU_NONE)) {
 723             dma_avail = s390_pci_update_iotlb(iommu, &entry);
 724             entry.iova += PAGE_SIZE;
 725             entry.translated_addr += PAGE_SIZE;
 726         }
 727     }
 728 err:
 729     if (error) {
 730         pbdev->state = ZPCI_FS_ERROR;
 731         setcc(cpu, ZPCI_PCI_LS_ERR);
 732         s390_set_status_code(env, r1, ZPCI_PCI_ST_FUNC_IN_ERR);
 733         s390_pci_generate_error_event(error, pbdev->fh, pbdev->fid, start, 0);
 734     } else {
 735         pbdev->fmb.counter[ZPCI_FMB_CNT_RPCIT]++;
 736         if (dma_avail > 0) {
 737             setcc(cpu, ZPCI_PCI_LS_OK);
 738         } else {
 739             /* vfio DMA mappings are exhausted, trigger a RPCIT */
 740             setcc(cpu, ZPCI_PCI_LS_ERR);
 741             s390_set_status_code(env, r1, ZPCI_RPCIT_ST_INSUFF_RES);
 742         }
 743     }
 744     return 0;
 745 }
 746
 747 int pcistb_service_call(S390CPU *cpu, uint8_t r1, uint8_t r3, uint64_t gaddr,
 748                         uint8_t ar, uintptr_t ra)
 749 {
 750     CPUS390XState *env = &cpu->env;
 751     S390PCIBusDevice *pbdev;
 752     MemoryRegion *mr;
 753     MemTxResult result;
 754     uint64_t offset;
 755     int i;
 756     uint32_t fh;
 757     uint8_t pcias;
 758     uint8_t len;
 759     uint8_t buffer[128];
 760
 761     if (env->psw.mask & PSW_MASK_PSTATE) {
 762         s390_program_interrupt(env, PGM_PRIVILEGED, ra);
 763         return 0;
 764     }
 765
 766     fh = env->regs[r1] >> 32;
 767     pcias = (env->regs[r1] >> 16) & 0xf;
 768     len = env->regs[r1] & 0xff;
 769     offset = env->regs[r3];
 770
 771     if (!(fh & FH_MASK_ENABLE)) {
 772         setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
 773         return 0;
 774     }
 775
 776     pbdev = s390_pci_find_dev_by_fh(s390_get_phb(), fh);
 777     if (!pbdev) {
 778         DPRINTF("pcistb no pci dev fh 0x%x\n", fh);
 779         setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
 780         return 0;
 781     }
 782
 783     switch (pbdev->state) {
 784     case ZPCI_FS_PERMANENT_ERROR:
 785     case ZPCI_FS_ERROR:
 786         setcc(cpu, ZPCI_PCI_LS_ERR);
 787         s390_set_status_code(env, r1, ZPCI_PCI_ST_BLOCKED);
 788         return 0;
 789     default:
 790         break;
 791     }
 792
 793     if (pcias > ZPCI_IO_BAR_MAX) {
 794         DPRINTF("pcistb invalid space\n");
 795         setcc(cpu, ZPCI_PCI_LS_ERR);
 796         s390_set_status_code(env, r1, ZPCI_PCI_ST_INVAL_AS);
 797         return 0;
 798     }
 799
 800     /* Verify the address, offset and length */
 801     /* offset must be a multiple of 8 */
 802     if (offset % 8) {
 803         goto specification_error;
 804     }
 805     /* Length must be greater than 8, a multiple of 8 */
 806     /* and not greater than maxstbl */
 807     if ((len <= 8) || (len % 8) ||
 808         (len > pbdev->pci_group->zpci_group.maxstbl)) {
 809         goto specification_error;
 810     }
 811     /* Do not cross a 4K-byte boundary */
 812     if (((offset & 0xfff) + len) > 0x1000) {
 813         goto specification_error;
 814     }
 815     /* Guest address must be double word aligned */
 816     if (gaddr & 0x07UL) {
 817         goto specification_error;
 818     }
 819
 820     mr = pbdev->pdev->io_regions[pcias].memory;
 821     mr = s390_get_subregion(mr, offset, len);
 822     offset -= mr->addr;
 823
 824     if (!memory_region_access_valid(mr, offset, len, true,
 825                                     MEMTXATTRS_UNSPECIFIED)) {
 826         s390_program_interrupt(env, PGM_OPERAND, ra);
 827         return 0;
 828     }
 829
 830     if (s390_cpu_virt_mem_read(cpu, gaddr, ar, buffer, len)) {
 831         s390_cpu_virt_mem_handle_exc(cpu, ra);
 832         return 0;
 833     }
 834
 835     for (i = 0; i < len / 8; i++) {
 836         result = memory_region_dispatch_write(mr, offset + i * 8,
 837                                               ldq_p(buffer + i * 8),
 838                                               MO_64, MEMTXATTRS_UNSPECIFIED);
 839         if (result != MEMTX_OK) {
 840             s390_program_interrupt(env, PGM_OPERAND, ra);
 841             return 0;
 842         }
 843     }
 844
 845     pbdev->fmb.counter[ZPCI_FMB_CNT_STB]++;
 846
 847     setcc(cpu, ZPCI_PCI_LS_OK);
 848     return 0;
 849
 850 specification_error:
 851     s390_program_interrupt(env, PGM_SPECIFICATION, ra);
 852     return 0;
 853 }
 854
 855 static int reg_irqs(CPUS390XState *env, S390PCIBusDevice *pbdev, ZpciFib fib)
 856 {
 857     int ret, len;
 858     uint8_t isc = FIB_DATA_ISC(ldl_p(&fib.data));
 859
 860     pbdev->routes.adapter.adapter_id = css_get_adapter_id(
 861                                        CSS_IO_ADAPTER_PCI, isc);
 862     pbdev->summary_ind = get_indicator(ldq_p(&fib.aisb), sizeof(uint64_t));
 863     len = BITS_TO_LONGS(FIB_DATA_NOI(ldl_p(&fib.data))) * sizeof(unsigned long);
 864     pbdev->indicator = get_indicator(ldq_p(&fib.aibv), len);
 865
 866     ret = map_indicator(&pbdev->routes.adapter, pbdev->summary_ind);
 867     if (ret) {
 868         goto out;
 869     }
 870
 871     ret = map_indicator(&pbdev->routes.adapter, pbdev->indicator);
 872     if (ret) {
 873         goto out;
 874     }
 875
 876     pbdev->routes.adapter.summary_addr = ldq_p(&fib.aisb);
 877     pbdev->routes.adapter.summary_offset = FIB_DATA_AISBO(ldl_p(&fib.data));
 878     pbdev->routes.adapter.ind_addr = ldq_p(&fib.aibv);
 879     pbdev->routes.adapter.ind_offset = FIB_DATA_AIBVO(ldl_p(&fib.data));
 880     pbdev->isc = isc;
 881     pbdev->noi = FIB_DATA_NOI(ldl_p(&fib.data));
 882     pbdev->sum = FIB_DATA_SUM(ldl_p(&fib.data));
 883
 884     DPRINTF("reg_irqs adapter id %d\n", pbdev->routes.adapter.adapter_id);
 885     return 0;
 886 out:
 887     release_indicator(&pbdev->routes.adapter, pbdev->summary_ind);
 888     release_indicator(&pbdev->routes.adapter, pbdev->indicator);
 889     pbdev->summary_ind = NULL;
 890     pbdev->indicator = NULL;
 891     return ret;
 892 }
 893
 894 int pci_dereg_irqs(S390PCIBusDevice *pbdev)
 895 {
 896     release_indicator(&pbdev->routes.adapter, pbdev->summary_ind);
 897     release_indicator(&pbdev->routes.adapter, pbdev->indicator);
 898
 899     pbdev->summary_ind = NULL;
 900     pbdev->indicator = NULL;
 901     pbdev->routes.adapter.summary_addr = 0;
 902     pbdev->routes.adapter.summary_offset = 0;
 903     pbdev->routes.adapter.ind_addr = 0;
 904     pbdev->routes.adapter.ind_offset = 0;
 905     pbdev->isc = 0;
 906     pbdev->noi = 0;
 907     pbdev->sum = 0;
 908
 909     DPRINTF("dereg_irqs adapter id %d\n", pbdev->routes.adapter.adapter_id);
 910     return 0;
 911 }
 912
 913 static int reg_ioat(CPUS390XState *env, S390PCIIOMMU *iommu, ZpciFib fib,
 914                     uintptr_t ra)
 915 {
 916     uint64_t pba = ldq_p(&fib.pba);
 917     uint64_t pal = ldq_p(&fib.pal);
 918     uint64_t g_iota = ldq_p(&fib.iota);
 919     uint8_t dt = (g_iota >> 2) & 0x7;
 920     uint8_t t = (g_iota >> 11) & 0x1;
 921
 922     pba &= ~0xfff;
 923     pal |= 0xfff;
 924     if (pba > pal || pba < ZPCI_SDMA_ADDR || pal > ZPCI_EDMA_ADDR) {
 925         s390_program_interrupt(env, PGM_OPERAND, ra);
 926         return -EINVAL;
 927     }
 928
 929     /* currently we only support designation type 1 with translation */
 930     if (!(dt == ZPCI_IOTA_RTTO && t)) {
 931         error_report("unsupported ioat dt %d t %d", dt, t);
 932         s390_program_interrupt(env, PGM_OPERAND, ra);
 933         return -EINVAL;
 934     }
 935
 936     iommu->pba = pba;
 937     iommu->pal = pal;
 938     iommu->g_iota = g_iota;
 939
 940     s390_pci_iommu_enable(iommu);
 941
 942     return 0;
 943 }
 944
 945 void pci_dereg_ioat(S390PCIIOMMU *iommu)
 946 {
 947     s390_pci_iommu_disable(iommu);
 948     iommu->pba = 0;
 949     iommu->pal = 0;
 950     iommu->g_iota = 0;
 951 }
 952
 953 void fmb_timer_free(S390PCIBusDevice *pbdev)
 954 {
 955     if (pbdev->fmb_timer) {
 956         timer_del(pbdev->fmb_timer);
 957         timer_free(pbdev->fmb_timer);
 958         pbdev->fmb_timer = NULL;
 959     }
 960     pbdev->fmb_addr = 0;
 961     memset(&pbdev->fmb, 0, sizeof(ZpciFmb));
 962 }
 963
 964 static int fmb_do_update(S390PCIBusDevice *pbdev, int offset, uint64_t val,
 965                          int len)
 966 {
 967     MemTxResult ret;
 968     uint64_t dst = pbdev->fmb_addr + offset;
 969
 970     switch (len) {
 971     case 8:
 972         address_space_stq_be(&address_space_memory, dst, val,
 973                              MEMTXATTRS_UNSPECIFIED,
 974                              &ret);
 975         break;
 976     case 4:
 977         address_space_stl_be(&address_space_memory, dst, val,
 978                              MEMTXATTRS_UNSPECIFIED,
 979                              &ret);
 980         break;
 981     case 2:
 982         address_space_stw_be(&address_space_memory, dst, val,
 983                              MEMTXATTRS_UNSPECIFIED,
 984                              &ret);
 985         break;
 986     case 1:
 987         address_space_stb(&address_space_memory, dst, val,
 988                           MEMTXATTRS_UNSPECIFIED,
 989                           &ret);
 990         break;
 991     default:
 992         ret = MEMTX_ERROR;
 993         break;
 994     }
 995     if (ret != MEMTX_OK) {
 996         s390_pci_generate_error_event(ERR_EVENT_FMBA, pbdev->fh, pbdev->fid,
 997                                       pbdev->fmb_addr, 0);
 998         fmb_timer_free(pbdev);
 999     }
1000
1001     return ret;
1002 }
1003
1004 static void fmb_update(void *opaque)
1005 {
1006     S390PCIBusDevice *pbdev = opaque;
1007     int64_t t = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL);
1008     int i;
1009
1010     /* Update U bit */
1011     pbdev->fmb.last_update *= 2;
1012     pbdev->fmb.last_update |= UPDATE_U_BIT;
1013     if (fmb_do_update(pbdev, offsetof(ZpciFmb, last_update),
1014                       pbdev->fmb.last_update,
1015                       sizeof(pbdev->fmb.last_update))) {
1016         return;
1017     }
1018
1019     /* Update FMB sample count */
1020     if (fmb_do_update(pbdev, offsetof(ZpciFmb, sample),
1021                       pbdev->fmb.sample++,
1022                       sizeof(pbdev->fmb.sample))) {
1023         return;
1024     }
1025
1026     /* Update FMB counters */
1027     for (i = 0; i < ZPCI_FMB_CNT_MAX; i++) {
1028         if (fmb_do_update(pbdev, offsetof(ZpciFmb, counter[i]),
1029                           pbdev->fmb.counter[i],
1030                           sizeof(pbdev->fmb.counter[0]))) {
1031             return;
1032         }
1033     }
1034
1035     /* Clear U bit and update the time */
1036     pbdev->fmb.last_update = time2tod(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
1037     pbdev->fmb.last_update *= 2;
1038     if (fmb_do_update(pbdev, offsetof(ZpciFmb, last_update),
1039                       pbdev->fmb.last_update,
1040                       sizeof(pbdev->fmb.last_update))) {
1041         return;
1042     }
1043     timer_mod(pbdev->fmb_timer, t + DEFAULT_MUI);
1044 }
1045
1046 int mpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba, uint8_t ar,
1047                         uintptr_t ra)
1048 {
1049     CPUS390XState *env = &cpu->env;
1050     uint8_t oc, dmaas;
1051     uint32_t fh;
1052     ZpciFib fib;
1053     S390PCIBusDevice *pbdev;
1054     uint64_t cc = ZPCI_PCI_LS_OK;
1055
1056     if (env->psw.mask & PSW_MASK_PSTATE) {
1057         s390_program_interrupt(env, PGM_PRIVILEGED, ra);
1058         return 0;
1059     }
1060
1061     oc = env->regs[r1] & 0xff;
1062     dmaas = (env->regs[r1] >> 16) & 0xff;
1063     fh = env->regs[r1] >> 32;
1064
1065     if (fiba & 0x7) {
1066         s390_program_interrupt(env, PGM_SPECIFICATION, ra);
1067         return 0;
1068     }
1069
1070     pbdev = s390_pci_find_dev_by_fh(s390_get_phb(), fh);
1071     if (!pbdev) {
1072         DPRINTF("mpcifc no pci dev fh 0x%x\n", fh);
1073         setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
1074         return 0;
1075     }
1076
1077     switch (pbdev->state) {
1078     case ZPCI_FS_RESERVED:
1079     case ZPCI_FS_STANDBY:
1080     case ZPCI_FS_DISABLED:
1081     case ZPCI_FS_PERMANENT_ERROR:
1082         setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
1083         return 0;
1084     default:
1085         break;
1086     }
1087
1088     if (s390_cpu_virt_mem_read(cpu, fiba, ar, (uint8_t *)&fib, sizeof(fib))) {
1089         s390_cpu_virt_mem_handle_exc(cpu, ra);
1090         return 0;
1091     }
1092
1093     if (fib.fmt != 0) {
1094         s390_program_interrupt(env, PGM_OPERAND, ra);
1095         return 0;
1096     }
1097
1098     switch (oc) {
1099     case ZPCI_MOD_FC_REG_INT:
1100         if (pbdev->summary_ind) {
1101             cc = ZPCI_PCI_LS_ERR;
1102             s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
1103         } else if (reg_irqs(env, pbdev, fib)) {
1104             cc = ZPCI_PCI_LS_ERR;
1105             s390_set_status_code(env, r1, ZPCI_MOD_ST_RES_NOT_AVAIL);
1106         }
1107         break;
1108     case ZPCI_MOD_FC_DEREG_INT:
1109         if (!pbdev->summary_ind) {
1110             cc = ZPCI_PCI_LS_ERR;
1111             s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
1112         } else {
1113             pci_dereg_irqs(pbdev);
1114         }
1115         break;
1116     case ZPCI_MOD_FC_REG_IOAT:
1117         if (dmaas != 0) {
1118             cc = ZPCI_PCI_LS_ERR;
1119             s390_set_status_code(env, r1, ZPCI_MOD_ST_DMAAS_INVAL);
1120         } else if (pbdev->iommu->enabled) {
1121             cc = ZPCI_PCI_LS_ERR;
1122             s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
1123         } else if (reg_ioat(env, pbdev->iommu, fib, ra)) {
1124             cc = ZPCI_PCI_LS_ERR;
1125             s390_set_status_code(env, r1, ZPCI_MOD_ST_INSUF_RES);
1126         }
1127         break;
1128     case ZPCI_MOD_FC_DEREG_IOAT:
1129         if (dmaas != 0) {
1130             cc = ZPCI_PCI_LS_ERR;
1131             s390_set_status_code(env, r1, ZPCI_MOD_ST_DMAAS_INVAL);
1132         } else if (!pbdev->iommu->enabled) {
1133             cc = ZPCI_PCI_LS_ERR;
1134             s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
1135         } else {
1136             pci_dereg_ioat(pbdev->iommu);
1137         }
1138         break;
1139     case ZPCI_MOD_FC_REREG_IOAT:
1140         if (dmaas != 0) {
1141             cc = ZPCI_PCI_LS_ERR;
1142             s390_set_status_code(env, r1, ZPCI_MOD_ST_DMAAS_INVAL);
1143         } else if (!pbdev->iommu->enabled) {
1144             cc = ZPCI_PCI_LS_ERR;
1145             s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
1146         } else {
1147             pci_dereg_ioat(pbdev->iommu);
1148             if (reg_ioat(env, pbdev->iommu, fib, ra)) {
1149                 cc = ZPCI_PCI_LS_ERR;
1150                 s390_set_status_code(env, r1, ZPCI_MOD_ST_INSUF_RES);
1151             }
1152         }
1153         break;
1154     case ZPCI_MOD_FC_RESET_ERROR:
1155         switch (pbdev->state) {
1156         case ZPCI_FS_BLOCKED:
1157         case ZPCI_FS_ERROR:
1158             pbdev->state = ZPCI_FS_ENABLED;
1159             break;
1160         default:
1161             cc = ZPCI_PCI_LS_ERR;
1162             s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
1163         }
1164         break;
1165     case ZPCI_MOD_FC_RESET_BLOCK:
1166         switch (pbdev->state) {
1167         case ZPCI_FS_ERROR:
1168             pbdev->state = ZPCI_FS_BLOCKED;
1169             break;
1170         default:
1171             cc = ZPCI_PCI_LS_ERR;
1172             s390_set_status_code(env, r1, ZPCI_MOD_ST_SEQUENCE);
1173         }
1174         break;
1175     case ZPCI_MOD_FC_SET_MEASURE: {
1176         uint64_t fmb_addr = ldq_p(&fib.fmb_addr);
1177
1178         if (fmb_addr & FMBK_MASK) {
1179             cc = ZPCI_PCI_LS_ERR;
1180             s390_pci_generate_error_event(ERR_EVENT_FMBPRO, pbdev->fh,
1181                                           pbdev->fid, fmb_addr, 0);
1182             fmb_timer_free(pbdev);
1183             break;
1184         }
1185
1186         if (!fmb_addr) {
1187             /* Stop updating FMB. */
1188             fmb_timer_free(pbdev);
1189             break;
1190         }
1191
1192         if (!pbdev->fmb_timer) {
1193             pbdev->fmb_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
1194                                             fmb_update, pbdev);
1195         } else if (timer_pending(pbdev->fmb_timer)) {
1196             /* Remove pending timer to update FMB address. */
1197             timer_del(pbdev->fmb_timer);
1198         }
1199         pbdev->fmb_addr = fmb_addr;
1200         timer_mod(pbdev->fmb_timer,
1201                   qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + DEFAULT_MUI);
1202         break;
1203     }
1204     default:
1205         s390_program_interrupt(&cpu->env, PGM_OPERAND, ra);
1206         cc = ZPCI_PCI_LS_ERR;
1207     }
1208
1209     setcc(cpu, cc);
1210     return 0;
1211 }
1212
1213 int stpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba, uint8_t ar,
1214                          uintptr_t ra)
1215 {
1216     CPUS390XState *env = &cpu->env;
1217     uint8_t dmaas;
1218     uint32_t fh;
1219     ZpciFib fib;
1220     S390PCIBusDevice *pbdev;
1221     uint32_t data;
1222     uint64_t cc = ZPCI_PCI_LS_OK;
1223
1224     if (env->psw.mask & PSW_MASK_PSTATE) {
1225         s390_program_interrupt(env, PGM_PRIVILEGED, ra);
1226         return 0;
1227     }
1228
1229     fh = env->regs[r1] >> 32;
1230     dmaas = (env->regs[r1] >> 16) & 0xff;
1231
1232     if (dmaas) {
1233         setcc(cpu, ZPCI_PCI_LS_ERR);
1234         s390_set_status_code(env, r1, ZPCI_STPCIFC_ST_INVAL_DMAAS);
1235         return 0;
1236     }
1237
1238     if (fiba & 0x7) {
1239         s390_program_interrupt(env, PGM_SPECIFICATION, ra);
1240         return 0;
1241     }
1242
1243     pbdev = s390_pci_find_dev_by_idx(s390_get_phb(), fh & FH_MASK_INDEX);
1244     if (!pbdev) {
1245         setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
1246         return 0;
1247     }
1248
1249     memset(&fib, 0, sizeof(fib));
1250
1251     switch (pbdev->state) {
1252     case ZPCI_FS_RESERVED:
1253     case ZPCI_FS_STANDBY:
1254         setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
1255         return 0;
1256     case ZPCI_FS_DISABLED:
1257         if (fh & FH_MASK_ENABLE) {
1258             setcc(cpu, ZPCI_PCI_LS_INVAL_HANDLE);
1259             return 0;
1260         }
1261         goto out;
1262     /* BLOCKED bit is set to one coincident with the setting of ERROR bit.
1263      * FH Enabled bit is set to one in states of ENABLED, BLOCKED or ERROR. */
1264     case ZPCI_FS_ERROR:
1265         fib.fc |= 0x20;
1266         /* fallthrough */
1267     case ZPCI_FS_BLOCKED:
1268         fib.fc |= 0x40;
1269         /* fallthrough */
1270     case ZPCI_FS_ENABLED:
1271         fib.fc |= 0x80;
1272         if (pbdev->iommu->enabled) {
1273             fib.fc |= 0x10;
1274         }
1275         if (!(fh & FH_MASK_ENABLE)) {
1276             env->regs[r1] |= 1ULL << 63;
1277         }
1278         break;
1279     case ZPCI_FS_PERMANENT_ERROR:
1280         setcc(cpu, ZPCI_PCI_LS_ERR);
1281         s390_set_status_code(env, r1, ZPCI_STPCIFC_ST_PERM_ERROR);
1282         return 0;
1283     }
1284
1285     stq_p(&fib.pba, pbdev->iommu->pba);
1286     stq_p(&fib.pal, pbdev->iommu->pal);
1287     stq_p(&fib.iota, pbdev->iommu->g_iota);
1288     stq_p(&fib.aibv, pbdev->routes.adapter.ind_addr);
1289     stq_p(&fib.aisb, pbdev->routes.adapter.summary_addr);
1290     stq_p(&fib.fmb_addr, pbdev->fmb_addr);
1291
1292     data = ((uint32_t)pbdev->isc << 28) | ((uint32_t)pbdev->noi << 16) |
1293            ((uint32_t)pbdev->routes.adapter.ind_offset << 8) |
1294            ((uint32_t)pbdev->sum << 7) | pbdev->routes.adapter.summary_offset;
1295     stl_p(&fib.data, data);
1296
1297 out:
1298     if (s390_cpu_virt_mem_write(cpu, fiba, ar, (uint8_t *)&fib, sizeof(fib))) {
1299         s390_cpu_virt_mem_handle_exc(cpu, ra);
1300         return 0;
1301     }
1302
1303     setcc(cpu, cc);
1304     return 0;
1305 }