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 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 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 PciCfgSccb *psccb = (PciCfgSccb *)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 (be16_to_cpu(sccb->h.length) < 16) { 131 rc = SCLP_RC_INSUFFICIENT_SCCB_LENGTH; 132 goto out; 133 } 134 135 if (!pbdev) { 136 DPRINTF("sclp config no dev found\n"); 137 rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED; 138 goto out; 139 } 140 141 switch (pbdev->state) { 142 case ZPCI_FS_RESERVED: 143 rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE; 144 break; 145 case ZPCI_FS_STANDBY: 146 pbdev->state = ZPCI_FS_DISABLED; 147 rc = SCLP_RC_NORMAL_COMPLETION; 148 break; 149 default: 150 rc = SCLP_RC_NO_ACTION_REQUIRED; 151 } 152 out: 153 psccb->header.response_code = cpu_to_be16(rc); 154 } 155 156 void s390_pci_sclp_deconfigure(SCCB *sccb) 157 { 158 PciCfgSccb *psccb = (PciCfgSccb *)sccb; 159 S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(s390_get_phb(), 160 be32_to_cpu(psccb->aid)); 161 uint16_t rc; 162 163 if (be16_to_cpu(sccb->h.length) < 16) { 164 rc = SCLP_RC_INSUFFICIENT_SCCB_LENGTH; 165 goto out; 166 } 167 168 if (!pbdev) { 169 DPRINTF("sclp deconfig no dev found\n"); 170 rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED; 171 goto out; 172 } 173 174 switch (pbdev->state) { 175 case ZPCI_FS_RESERVED: 176 rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE; 177 break; 178 case ZPCI_FS_STANDBY: 179 rc = SCLP_RC_NO_ACTION_REQUIRED; 180 break; 181 default: 182 if (pbdev->summary_ind) { 183 pci_dereg_irqs(pbdev); 184 } 185 if (pbdev->iommu->enabled) { 186 pci_dereg_ioat(pbdev->iommu); 187 } 188 pbdev->state = ZPCI_FS_STANDBY; 189 rc = SCLP_RC_NORMAL_COMPLETION; 190 191 if (pbdev->release_timer) { 192 qdev_unplug(DEVICE(pbdev->pdev), NULL); 193 } 194 } 195 out: 196 psccb->header.response_code = cpu_to_be16(rc); 197 } 198 199 static S390PCIBusDevice *s390_pci_find_dev_by_uid(S390pciState *s, uint16_t uid) 200 { 201 S390PCIBusDevice *pbdev; 202 203 QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) { 204 if (pbdev->uid == uid) { 205 return pbdev; 206 } 207 } 208 209 return NULL; 210 } 211 212 static S390PCIBusDevice *s390_pci_find_dev_by_target(S390pciState *s, 213 const char *target) 214 { 215 S390PCIBusDevice *pbdev; 216 217 if (!target) { 218 return NULL; 219 } 220 221 QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) { 222 if (!strcmp(pbdev->target, target)) { 223 return pbdev; 224 } 225 } 226 227 return NULL; 228 } 229 230 S390PCIBusDevice *s390_pci_find_dev_by_idx(S390pciState *s, uint32_t idx) 231 { 232 return g_hash_table_lookup(s->zpci_table, &idx); 233 } 234 235 S390PCIBusDevice *s390_pci_find_dev_by_fh(S390pciState *s, uint32_t fh) 236 { 237 uint32_t idx = FH_MASK_INDEX & fh; 238 S390PCIBusDevice *pbdev = s390_pci_find_dev_by_idx(s, idx); 239 240 if (pbdev && pbdev->fh == fh) { 241 return pbdev; 242 } 243 244 return NULL; 245 } 246 247 static void s390_pci_generate_event(uint8_t cc, uint16_t pec, uint32_t fh, 248 uint32_t fid, uint64_t faddr, uint32_t e) 249 { 250 SeiContainer *sei_cont; 251 S390pciState *s = s390_get_phb(); 252 253 sei_cont = g_malloc0(sizeof(SeiContainer)); 254 sei_cont->fh = fh; 255 sei_cont->fid = fid; 256 sei_cont->cc = cc; 257 sei_cont->pec = pec; 258 sei_cont->faddr = faddr; 259 sei_cont->e = e; 260 261 QTAILQ_INSERT_TAIL(&s->pending_sei, sei_cont, link); 262 css_generate_css_crws(0); 263 } 264 265 static void s390_pci_generate_plug_event(uint16_t pec, uint32_t fh, 266 uint32_t fid) 267 { 268 s390_pci_generate_event(2, pec, fh, fid, 0, 0); 269 } 270 271 void s390_pci_generate_error_event(uint16_t pec, uint32_t fh, uint32_t fid, 272 uint64_t faddr, uint32_t e) 273 { 274 s390_pci_generate_event(1, pec, fh, fid, faddr, e); 275 } 276 277 static void s390_pci_set_irq(void *opaque, int irq, int level) 278 { 279 /* nothing to do */ 280 } 281 282 static int s390_pci_map_irq(PCIDevice *pci_dev, int irq_num) 283 { 284 /* nothing to do */ 285 return 0; 286 } 287 288 static uint64_t s390_pci_get_table_origin(uint64_t iota) 289 { 290 return iota & ~ZPCI_IOTA_RTTO_FLAG; 291 } 292 293 static unsigned int calc_rtx(dma_addr_t ptr) 294 { 295 return ((unsigned long) ptr >> ZPCI_RT_SHIFT) & ZPCI_INDEX_MASK; 296 } 297 298 static unsigned int calc_sx(dma_addr_t ptr) 299 { 300 return ((unsigned long) ptr >> ZPCI_ST_SHIFT) & ZPCI_INDEX_MASK; 301 } 302 303 static unsigned int calc_px(dma_addr_t ptr) 304 { 305 return ((unsigned long) ptr >> PAGE_SHIFT) & ZPCI_PT_MASK; 306 } 307 308 static uint64_t get_rt_sto(uint64_t entry) 309 { 310 return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_RTX) 311 ? (entry & ZPCI_RTE_ADDR_MASK) 312 : 0; 313 } 314 315 static uint64_t get_st_pto(uint64_t entry) 316 { 317 return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_SX) 318 ? (entry & ZPCI_STE_ADDR_MASK) 319 : 0; 320 } 321 322 static uint64_t s390_guest_io_table_walk(uint64_t guest_iota, 323 uint64_t guest_dma_address) 324 { 325 uint64_t sto_a, pto_a, px_a; 326 uint64_t sto, pto, pte; 327 uint32_t rtx, sx, px; 328 329 rtx = calc_rtx(guest_dma_address); 330 sx = calc_sx(guest_dma_address); 331 px = calc_px(guest_dma_address); 332 333 sto_a = guest_iota + rtx * sizeof(uint64_t); 334 sto = address_space_ldq(&address_space_memory, sto_a, 335 MEMTXATTRS_UNSPECIFIED, NULL); 336 sto = get_rt_sto(sto); 337 if (!sto) { 338 pte = 0; 339 goto out; 340 } 341 342 pto_a = sto + sx * sizeof(uint64_t); 343 pto = address_space_ldq(&address_space_memory, pto_a, 344 MEMTXATTRS_UNSPECIFIED, NULL); 345 pto = get_st_pto(pto); 346 if (!pto) { 347 pte = 0; 348 goto out; 349 } 350 351 px_a = pto + px * sizeof(uint64_t); 352 pte = address_space_ldq(&address_space_memory, px_a, 353 MEMTXATTRS_UNSPECIFIED, NULL); 354 355 out: 356 return pte; 357 } 358 359 static IOMMUTLBEntry s390_translate_iommu(MemoryRegion *mr, hwaddr addr, 360 bool is_write) 361 { 362 uint64_t pte; 363 uint32_t flags; 364 S390PCIIOMMU *iommu = container_of(mr, S390PCIIOMMU, iommu_mr); 365 IOMMUTLBEntry ret = { 366 .target_as = &address_space_memory, 367 .iova = 0, 368 .translated_addr = 0, 369 .addr_mask = ~(hwaddr)0, 370 .perm = IOMMU_NONE, 371 }; 372 373 switch (iommu->pbdev->state) { 374 case ZPCI_FS_ENABLED: 375 case ZPCI_FS_BLOCKED: 376 if (!iommu->enabled) { 377 return ret; 378 } 379 break; 380 default: 381 return ret; 382 } 383 384 DPRINTF("iommu trans addr 0x%" PRIx64 "\n", addr); 385 386 if (addr < iommu->pba || addr > iommu->pal) { 387 return ret; 388 } 389 390 pte = s390_guest_io_table_walk(s390_pci_get_table_origin(iommu->g_iota), 391 addr); 392 if (!pte) { 393 return ret; 394 } 395 396 flags = pte & ZPCI_PTE_FLAG_MASK; 397 ret.iova = addr; 398 ret.translated_addr = pte & ZPCI_PTE_ADDR_MASK; 399 ret.addr_mask = 0xfff; 400 401 if (flags & ZPCI_PTE_INVALID) { 402 ret.perm = IOMMU_NONE; 403 } else { 404 ret.perm = IOMMU_RW; 405 } 406 407 return ret; 408 } 409 410 static const MemoryRegionIOMMUOps s390_iommu_ops = { 411 .translate = s390_translate_iommu, 412 }; 413 414 static S390PCIIOMMU *s390_pci_get_iommu(S390pciState *s, PCIBus *bus, 415 int devfn) 416 { 417 uint64_t key = (uintptr_t)bus; 418 S390PCIIOMMUTable *table = g_hash_table_lookup(s->iommu_table, &key); 419 S390PCIIOMMU *iommu; 420 421 if (!table) { 422 table = g_malloc0(sizeof(S390PCIIOMMUTable)); 423 table->key = key; 424 g_hash_table_insert(s->iommu_table, &table->key, table); 425 } 426 427 iommu = table->iommu[PCI_SLOT(devfn)]; 428 if (!iommu) { 429 iommu = S390_PCI_IOMMU(object_new(TYPE_S390_PCI_IOMMU)); 430 431 char *mr_name = g_strdup_printf("iommu-root-%02x:%02x.%01x", 432 pci_bus_num(bus), 433 PCI_SLOT(devfn), 434 PCI_FUNC(devfn)); 435 char *as_name = g_strdup_printf("iommu-pci-%02x:%02x.%01x", 436 pci_bus_num(bus), 437 PCI_SLOT(devfn), 438 PCI_FUNC(devfn)); 439 memory_region_init(&iommu->mr, OBJECT(iommu), mr_name, UINT64_MAX); 440 address_space_init(&iommu->as, &iommu->mr, as_name); 441 table->iommu[PCI_SLOT(devfn)] = iommu; 442 443 g_free(mr_name); 444 g_free(as_name); 445 } 446 447 return iommu; 448 } 449 450 static AddressSpace *s390_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn) 451 { 452 S390pciState *s = opaque; 453 S390PCIIOMMU *iommu = s390_pci_get_iommu(s, bus, devfn); 454 455 return &iommu->as; 456 } 457 458 static uint8_t set_ind_atomic(uint64_t ind_loc, uint8_t to_be_set) 459 { 460 uint8_t ind_old, ind_new; 461 hwaddr len = 1; 462 uint8_t *ind_addr; 463 464 ind_addr = cpu_physical_memory_map(ind_loc, &len, 1); 465 if (!ind_addr) { 466 s390_pci_generate_error_event(ERR_EVENT_AIRERR, 0, 0, 0, 0); 467 return -1; 468 } 469 do { 470 ind_old = *ind_addr; 471 ind_new = ind_old | to_be_set; 472 } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old); 473 cpu_physical_memory_unmap(ind_addr, len, 1, len); 474 475 return ind_old; 476 } 477 478 static void s390_msi_ctrl_write(void *opaque, hwaddr addr, uint64_t data, 479 unsigned int size) 480 { 481 S390PCIBusDevice *pbdev = opaque; 482 uint32_t idx = data >> ZPCI_MSI_VEC_BITS; 483 uint32_t vec = data & ZPCI_MSI_VEC_MASK; 484 uint64_t ind_bit; 485 uint32_t sum_bit; 486 uint32_t e = 0; 487 488 DPRINTF("write_msix data 0x%" PRIx64 " idx %d vec 0x%x\n", data, idx, vec); 489 490 if (!pbdev) { 491 e |= (vec << ERR_EVENT_MVN_OFFSET); 492 s390_pci_generate_error_event(ERR_EVENT_NOMSI, idx, 0, addr, e); 493 return; 494 } 495 496 if (pbdev->state != ZPCI_FS_ENABLED) { 497 return; 498 } 499 500 ind_bit = pbdev->routes.adapter.ind_offset; 501 sum_bit = pbdev->routes.adapter.summary_offset; 502 503 set_ind_atomic(pbdev->routes.adapter.ind_addr + (ind_bit + vec) / 8, 504 0x80 >> ((ind_bit + vec) % 8)); 505 if (!set_ind_atomic(pbdev->routes.adapter.summary_addr + sum_bit / 8, 506 0x80 >> (sum_bit % 8))) { 507 css_adapter_interrupt(pbdev->isc); 508 } 509 } 510 511 static uint64_t s390_msi_ctrl_read(void *opaque, hwaddr addr, unsigned size) 512 { 513 return 0xffffffff; 514 } 515 516 static const MemoryRegionOps s390_msi_ctrl_ops = { 517 .write = s390_msi_ctrl_write, 518 .read = s390_msi_ctrl_read, 519 .endianness = DEVICE_LITTLE_ENDIAN, 520 }; 521 522 void s390_pci_iommu_enable(S390PCIIOMMU *iommu) 523 { 524 char *name = g_strdup_printf("iommu-s390-%04x", iommu->pbdev->uid); 525 memory_region_init_iommu(&iommu->iommu_mr, OBJECT(&iommu->mr), 526 &s390_iommu_ops, name, iommu->pal + 1); 527 iommu->enabled = true; 528 memory_region_add_subregion(&iommu->mr, 0, &iommu->iommu_mr); 529 g_free(name); 530 } 531 532 void s390_pci_iommu_disable(S390PCIIOMMU *iommu) 533 { 534 iommu->enabled = false; 535 memory_region_del_subregion(&iommu->mr, &iommu->iommu_mr); 536 object_unparent(OBJECT(&iommu->iommu_mr)); 537 } 538 539 static void s390_pci_iommu_free(S390pciState *s, PCIBus *bus, int32_t devfn) 540 { 541 uint64_t key = (uintptr_t)bus; 542 S390PCIIOMMUTable *table = g_hash_table_lookup(s->iommu_table, &key); 543 S390PCIIOMMU *iommu = table ? table->iommu[PCI_SLOT(devfn)] : NULL; 544 545 if (!table || !iommu) { 546 return; 547 } 548 549 table->iommu[PCI_SLOT(devfn)] = NULL; 550 address_space_destroy(&iommu->as); 551 object_unparent(OBJECT(&iommu->mr)); 552 object_unparent(OBJECT(iommu)); 553 object_unref(OBJECT(iommu)); 554 } 555 556 static int s390_pcihost_init(SysBusDevice *dev) 557 { 558 PCIBus *b; 559 BusState *bus; 560 PCIHostState *phb = PCI_HOST_BRIDGE(dev); 561 S390pciState *s = S390_PCI_HOST_BRIDGE(dev); 562 563 DPRINTF("host_init\n"); 564 565 b = pci_register_bus(DEVICE(dev), NULL, 566 s390_pci_set_irq, s390_pci_map_irq, NULL, 567 get_system_memory(), get_system_io(), 0, 64, 568 TYPE_PCI_BUS); 569 pci_setup_iommu(b, s390_pci_dma_iommu, s); 570 571 bus = BUS(b); 572 qbus_set_hotplug_handler(bus, DEVICE(dev), NULL); 573 phb->bus = b; 574 575 s->bus = S390_PCI_BUS(qbus_create(TYPE_S390_PCI_BUS, DEVICE(s), NULL)); 576 qbus_set_hotplug_handler(BUS(s->bus), DEVICE(s), NULL); 577 578 s->iommu_table = g_hash_table_new_full(g_int64_hash, g_int64_equal, 579 NULL, g_free); 580 s->zpci_table = g_hash_table_new_full(g_int_hash, g_int_equal, NULL, NULL); 581 s->bus_no = 0; 582 QTAILQ_INIT(&s->pending_sei); 583 QTAILQ_INIT(&s->zpci_devs); 584 585 css_register_io_adapters(CSS_IO_ADAPTER_PCI, true, false, &error_abort); 586 587 return 0; 588 } 589 590 static int s390_pci_msix_init(S390PCIBusDevice *pbdev) 591 { 592 char *name; 593 uint8_t pos; 594 uint16_t ctrl; 595 uint32_t table, pba; 596 597 pos = pci_find_capability(pbdev->pdev, PCI_CAP_ID_MSIX); 598 if (!pos) { 599 pbdev->msix.available = false; 600 return -1; 601 } 602 603 ctrl = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_FLAGS, 604 pci_config_size(pbdev->pdev), sizeof(ctrl)); 605 table = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_TABLE, 606 pci_config_size(pbdev->pdev), sizeof(table)); 607 pba = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_PBA, 608 pci_config_size(pbdev->pdev), sizeof(pba)); 609 610 pbdev->msix.table_bar = table & PCI_MSIX_FLAGS_BIRMASK; 611 pbdev->msix.table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK; 612 pbdev->msix.pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK; 613 pbdev->msix.pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK; 614 pbdev->msix.entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1; 615 pbdev->msix.available = true; 616 617 name = g_strdup_printf("msix-s390-%04x", pbdev->uid); 618 memory_region_init_io(&pbdev->msix_notify_mr, OBJECT(pbdev), 619 &s390_msi_ctrl_ops, pbdev, name, PAGE_SIZE); 620 memory_region_add_subregion(&pbdev->iommu->mr, ZPCI_MSI_ADDR, 621 &pbdev->msix_notify_mr); 622 g_free(name); 623 624 return 0; 625 } 626 627 static void s390_pci_msix_free(S390PCIBusDevice *pbdev) 628 { 629 memory_region_del_subregion(&pbdev->iommu->mr, &pbdev->msix_notify_mr); 630 object_unparent(OBJECT(&pbdev->msix_notify_mr)); 631 } 632 633 static S390PCIBusDevice *s390_pci_device_new(S390pciState *s, 634 const char *target) 635 { 636 DeviceState *dev = NULL; 637 638 dev = qdev_try_create(BUS(s->bus), TYPE_S390_PCI_DEVICE); 639 if (!dev) { 640 return NULL; 641 } 642 643 qdev_prop_set_string(dev, "target", target); 644 qdev_init_nofail(dev); 645 646 return S390_PCI_DEVICE(dev); 647 } 648 649 static bool s390_pci_alloc_idx(S390pciState *s, S390PCIBusDevice *pbdev) 650 { 651 uint32_t idx; 652 653 idx = s->next_idx; 654 while (s390_pci_find_dev_by_idx(s, idx)) { 655 idx = (idx + 1) & FH_MASK_INDEX; 656 if (idx == s->next_idx) { 657 return false; 658 } 659 } 660 661 pbdev->idx = idx; 662 s->next_idx = (idx + 1) & FH_MASK_INDEX; 663 664 return true; 665 } 666 667 static void s390_pcihost_hot_plug(HotplugHandler *hotplug_dev, 668 DeviceState *dev, Error **errp) 669 { 670 PCIDevice *pdev = NULL; 671 S390PCIBusDevice *pbdev = NULL; 672 S390pciState *s = s390_get_phb(); 673 674 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) { 675 BusState *bus; 676 PCIBridge *pb = PCI_BRIDGE(dev); 677 PCIDevice *pdev = PCI_DEVICE(dev); 678 679 pci_bridge_map_irq(pb, dev->id, s390_pci_map_irq); 680 pci_setup_iommu(&pb->sec_bus, s390_pci_dma_iommu, s); 681 682 bus = BUS(&pb->sec_bus); 683 qbus_set_hotplug_handler(bus, DEVICE(s), errp); 684 685 if (dev->hotplugged) { 686 pci_default_write_config(pdev, PCI_PRIMARY_BUS, s->bus_no, 1); 687 s->bus_no += 1; 688 pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1); 689 do { 690 pdev = pdev->bus->parent_dev; 691 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, 692 s->bus_no, 1); 693 } while (pdev->bus && pci_bus_num(pdev->bus)); 694 } 695 } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { 696 pdev = PCI_DEVICE(dev); 697 698 if (!dev->id) { 699 /* In the case the PCI device does not define an id */ 700 /* we generate one based on the PCI address */ 701 dev->id = g_strdup_printf("auto_%02x:%02x.%01x", 702 pci_bus_num(pdev->bus), 703 PCI_SLOT(pdev->devfn), 704 PCI_FUNC(pdev->devfn)); 705 } 706 707 pbdev = s390_pci_find_dev_by_target(s, dev->id); 708 if (!pbdev) { 709 pbdev = s390_pci_device_new(s, dev->id); 710 if (!pbdev) { 711 error_setg(errp, "create zpci device failed"); 712 return; 713 } 714 } 715 716 if (object_dynamic_cast(OBJECT(dev), "vfio-pci")) { 717 pbdev->fh |= FH_SHM_VFIO; 718 } else { 719 pbdev->fh |= FH_SHM_EMUL; 720 } 721 722 pbdev->pdev = pdev; 723 pbdev->iommu = s390_pci_get_iommu(s, pdev->bus, pdev->devfn); 724 pbdev->iommu->pbdev = pbdev; 725 pbdev->state = ZPCI_FS_STANDBY; 726 727 if (s390_pci_msix_init(pbdev)) { 728 error_setg(errp, "MSI-X support is mandatory " 729 "in the S390 architecture"); 730 return; 731 } 732 733 if (dev->hotplugged) { 734 s390_pci_generate_plug_event(HP_EVENT_RESERVED_TO_STANDBY, 735 pbdev->fh, pbdev->fid); 736 } 737 } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) { 738 pbdev = S390_PCI_DEVICE(dev); 739 740 if (!s390_pci_alloc_idx(s, pbdev)) { 741 error_setg(errp, "no slot for plugging zpci device"); 742 return; 743 } 744 pbdev->fh = pbdev->idx; 745 QTAILQ_INSERT_TAIL(&s->zpci_devs, pbdev, link); 746 g_hash_table_insert(s->zpci_table, &pbdev->idx, pbdev); 747 } 748 } 749 750 static void s390_pcihost_timer_cb(void *opaque) 751 { 752 S390PCIBusDevice *pbdev = opaque; 753 754 if (pbdev->summary_ind) { 755 pci_dereg_irqs(pbdev); 756 } 757 if (pbdev->iommu->enabled) { 758 pci_dereg_ioat(pbdev->iommu); 759 } 760 761 pbdev->state = ZPCI_FS_STANDBY; 762 s390_pci_generate_plug_event(HP_EVENT_CONFIGURED_TO_STBRES, 763 pbdev->fh, pbdev->fid); 764 qdev_unplug(DEVICE(pbdev), NULL); 765 } 766 767 static void s390_pcihost_hot_unplug(HotplugHandler *hotplug_dev, 768 DeviceState *dev, Error **errp) 769 { 770 PCIDevice *pci_dev = NULL; 771 PCIBus *bus; 772 int32_t devfn; 773 S390PCIBusDevice *pbdev = NULL; 774 S390pciState *s = s390_get_phb(); 775 776 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) { 777 error_setg(errp, "PCI bridge hot unplug currently not supported"); 778 return; 779 } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { 780 pci_dev = PCI_DEVICE(dev); 781 782 QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) { 783 if (pbdev->pdev == pci_dev) { 784 break; 785 } 786 } 787 assert(pbdev != NULL); 788 } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) { 789 pbdev = S390_PCI_DEVICE(dev); 790 pci_dev = pbdev->pdev; 791 } 792 793 switch (pbdev->state) { 794 case ZPCI_FS_RESERVED: 795 goto out; 796 case ZPCI_FS_STANDBY: 797 break; 798 default: 799 s390_pci_generate_plug_event(HP_EVENT_DECONFIGURE_REQUEST, 800 pbdev->fh, pbdev->fid); 801 pbdev->release_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, 802 s390_pcihost_timer_cb, 803 pbdev); 804 timer_mod(pbdev->release_timer, 805 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + HOT_UNPLUG_TIMEOUT); 806 return; 807 } 808 809 if (pbdev->release_timer && timer_pending(pbdev->release_timer)) { 810 timer_del(pbdev->release_timer); 811 timer_free(pbdev->release_timer); 812 pbdev->release_timer = NULL; 813 } 814 815 s390_pci_generate_plug_event(HP_EVENT_STANDBY_TO_RESERVED, 816 pbdev->fh, pbdev->fid); 817 bus = pci_dev->bus; 818 devfn = pci_dev->devfn; 819 object_unparent(OBJECT(pci_dev)); 820 s390_pci_msix_free(pbdev); 821 s390_pci_iommu_free(s, bus, devfn); 822 pbdev->pdev = NULL; 823 pbdev->state = ZPCI_FS_RESERVED; 824 out: 825 pbdev->fid = 0; 826 QTAILQ_REMOVE(&s->zpci_devs, pbdev, link); 827 g_hash_table_remove(s->zpci_table, &pbdev->idx); 828 object_unparent(OBJECT(pbdev)); 829 } 830 831 static void s390_pci_enumerate_bridge(PCIBus *bus, PCIDevice *pdev, 832 void *opaque) 833 { 834 S390pciState *s = opaque; 835 unsigned int primary = s->bus_no; 836 unsigned int subordinate = 0xff; 837 PCIBus *sec_bus = NULL; 838 839 if ((pci_default_read_config(pdev, PCI_HEADER_TYPE, 1) != 840 PCI_HEADER_TYPE_BRIDGE)) { 841 return; 842 } 843 844 (s->bus_no)++; 845 pci_default_write_config(pdev, PCI_PRIMARY_BUS, primary, 1); 846 pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1); 847 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1); 848 849 sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev)); 850 if (!sec_bus) { 851 return; 852 } 853 854 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, subordinate, 1); 855 pci_for_each_device(sec_bus, pci_bus_num(sec_bus), 856 s390_pci_enumerate_bridge, s); 857 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1); 858 } 859 860 static void s390_pcihost_reset(DeviceState *dev) 861 { 862 S390pciState *s = S390_PCI_HOST_BRIDGE(dev); 863 PCIBus *bus = s->parent_obj.bus; 864 865 s->bus_no = 0; 866 pci_for_each_device(bus, pci_bus_num(bus), s390_pci_enumerate_bridge, s); 867 } 868 869 static void s390_pcihost_class_init(ObjectClass *klass, void *data) 870 { 871 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); 872 DeviceClass *dc = DEVICE_CLASS(klass); 873 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); 874 875 dc->cannot_instantiate_with_device_add_yet = true; 876 dc->reset = s390_pcihost_reset; 877 k->init = s390_pcihost_init; 878 hc->plug = s390_pcihost_hot_plug; 879 hc->unplug = s390_pcihost_hot_unplug; 880 msi_nonbroken = true; 881 } 882 883 static const TypeInfo s390_pcihost_info = { 884 .name = TYPE_S390_PCI_HOST_BRIDGE, 885 .parent = TYPE_PCI_HOST_BRIDGE, 886 .instance_size = sizeof(S390pciState), 887 .class_init = s390_pcihost_class_init, 888 .interfaces = (InterfaceInfo[]) { 889 { TYPE_HOTPLUG_HANDLER }, 890 { } 891 } 892 }; 893 894 static const TypeInfo s390_pcibus_info = { 895 .name = TYPE_S390_PCI_BUS, 896 .parent = TYPE_BUS, 897 .instance_size = sizeof(S390PCIBus), 898 }; 899 900 static uint16_t s390_pci_generate_uid(S390pciState *s) 901 { 902 uint16_t uid = 0; 903 904 do { 905 uid++; 906 if (!s390_pci_find_dev_by_uid(s, uid)) { 907 return uid; 908 } 909 } while (uid < ZPCI_MAX_UID); 910 911 return UID_UNDEFINED; 912 } 913 914 static uint32_t s390_pci_generate_fid(S390pciState *s, Error **errp) 915 { 916 uint32_t fid = 0; 917 918 do { 919 if (!s390_pci_find_dev_by_fid(s, fid)) { 920 return fid; 921 } 922 } while (fid++ != ZPCI_MAX_FID); 923 924 error_setg(errp, "no free fid could be found"); 925 return 0; 926 } 927 928 static void s390_pci_device_realize(DeviceState *dev, Error **errp) 929 { 930 S390PCIBusDevice *zpci = S390_PCI_DEVICE(dev); 931 S390pciState *s = s390_get_phb(); 932 933 if (!zpci->target) { 934 error_setg(errp, "target must be defined"); 935 return; 936 } 937 938 if (s390_pci_find_dev_by_target(s, zpci->target)) { 939 error_setg(errp, "target %s already has an associated zpci device", 940 zpci->target); 941 return; 942 } 943 944 if (zpci->uid == UID_UNDEFINED) { 945 zpci->uid = s390_pci_generate_uid(s); 946 if (!zpci->uid) { 947 error_setg(errp, "no free uid could be found"); 948 return; 949 } 950 } else if (s390_pci_find_dev_by_uid(s, zpci->uid)) { 951 error_setg(errp, "uid %u already in use", zpci->uid); 952 return; 953 } 954 955 if (!zpci->fid_defined) { 956 Error *local_error = NULL; 957 958 zpci->fid = s390_pci_generate_fid(s, &local_error); 959 if (local_error) { 960 error_propagate(errp, local_error); 961 return; 962 } 963 } else if (s390_pci_find_dev_by_fid(s, zpci->fid)) { 964 error_setg(errp, "fid %u already in use", zpci->fid); 965 return; 966 } 967 968 zpci->state = ZPCI_FS_RESERVED; 969 } 970 971 static void s390_pci_device_reset(DeviceState *dev) 972 { 973 S390PCIBusDevice *pbdev = S390_PCI_DEVICE(dev); 974 975 switch (pbdev->state) { 976 case ZPCI_FS_RESERVED: 977 return; 978 case ZPCI_FS_STANDBY: 979 break; 980 default: 981 pbdev->fh &= ~FH_MASK_ENABLE; 982 pbdev->state = ZPCI_FS_DISABLED; 983 break; 984 } 985 986 if (pbdev->summary_ind) { 987 pci_dereg_irqs(pbdev); 988 } 989 if (pbdev->iommu->enabled) { 990 pci_dereg_ioat(pbdev->iommu); 991 } 992 993 pbdev->fmb_addr = 0; 994 } 995 996 static void s390_pci_get_fid(Object *obj, Visitor *v, const char *name, 997 void *opaque, Error **errp) 998 { 999 Property *prop = opaque; 1000 uint32_t *ptr = qdev_get_prop_ptr(DEVICE(obj), prop); 1001 1002 visit_type_uint32(v, name, ptr, errp); 1003 } 1004 1005 static void s390_pci_set_fid(Object *obj, Visitor *v, const char *name, 1006 void *opaque, Error **errp) 1007 { 1008 DeviceState *dev = DEVICE(obj); 1009 S390PCIBusDevice *zpci = S390_PCI_DEVICE(obj); 1010 Property *prop = opaque; 1011 uint32_t *ptr = qdev_get_prop_ptr(dev, prop); 1012 1013 if (dev->realized) { 1014 qdev_prop_set_after_realize(dev, name, errp); 1015 return; 1016 } 1017 1018 visit_type_uint32(v, name, ptr, errp); 1019 zpci->fid_defined = true; 1020 } 1021 1022 static PropertyInfo s390_pci_fid_propinfo = { 1023 .name = "zpci_fid", 1024 .get = s390_pci_get_fid, 1025 .set = s390_pci_set_fid, 1026 }; 1027 1028 #define DEFINE_PROP_S390_PCI_FID(_n, _s, _f) \ 1029 DEFINE_PROP(_n, _s, _f, s390_pci_fid_propinfo, uint32_t) 1030 1031 static Property s390_pci_device_properties[] = { 1032 DEFINE_PROP_UINT16("uid", S390PCIBusDevice, uid, UID_UNDEFINED), 1033 DEFINE_PROP_S390_PCI_FID("fid", S390PCIBusDevice, fid), 1034 DEFINE_PROP_STRING("target", S390PCIBusDevice, target), 1035 DEFINE_PROP_END_OF_LIST(), 1036 }; 1037 1038 static void s390_pci_device_class_init(ObjectClass *klass, void *data) 1039 { 1040 DeviceClass *dc = DEVICE_CLASS(klass); 1041 1042 dc->desc = "zpci device"; 1043 dc->reset = s390_pci_device_reset; 1044 dc->bus_type = TYPE_S390_PCI_BUS; 1045 dc->realize = s390_pci_device_realize; 1046 dc->props = s390_pci_device_properties; 1047 } 1048 1049 static const TypeInfo s390_pci_device_info = { 1050 .name = TYPE_S390_PCI_DEVICE, 1051 .parent = TYPE_DEVICE, 1052 .instance_size = sizeof(S390PCIBusDevice), 1053 .class_init = s390_pci_device_class_init, 1054 }; 1055 1056 static TypeInfo s390_pci_iommu_info = { 1057 .name = TYPE_S390_PCI_IOMMU, 1058 .parent = TYPE_OBJECT, 1059 .instance_size = sizeof(S390PCIIOMMU), 1060 }; 1061 1062 static void s390_pci_register_types(void) 1063 { 1064 type_register_static(&s390_pcihost_info); 1065 type_register_static(&s390_pcibus_info); 1066 type_register_static(&s390_pci_device_info); 1067 type_register_static(&s390_pci_iommu_info); 1068 } 1069 1070 type_init(s390_pci_register_types) 1071