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(IOMMUMemoryRegion *mr, hwaddr addr, 360 IOMMUAccessFlags flag) 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 S390PCIIOMMU *s390_pci_get_iommu(S390pciState *s, PCIBus *bus, 411 int devfn) 412 { 413 uint64_t key = (uintptr_t)bus; 414 S390PCIIOMMUTable *table = g_hash_table_lookup(s->iommu_table, &key); 415 S390PCIIOMMU *iommu; 416 417 if (!table) { 418 table = g_malloc0(sizeof(S390PCIIOMMUTable)); 419 table->key = key; 420 g_hash_table_insert(s->iommu_table, &table->key, table); 421 } 422 423 iommu = table->iommu[PCI_SLOT(devfn)]; 424 if (!iommu) { 425 iommu = S390_PCI_IOMMU(object_new(TYPE_S390_PCI_IOMMU)); 426 427 char *mr_name = g_strdup_printf("iommu-root-%02x:%02x.%01x", 428 pci_bus_num(bus), 429 PCI_SLOT(devfn), 430 PCI_FUNC(devfn)); 431 char *as_name = g_strdup_printf("iommu-pci-%02x:%02x.%01x", 432 pci_bus_num(bus), 433 PCI_SLOT(devfn), 434 PCI_FUNC(devfn)); 435 memory_region_init(&iommu->mr, OBJECT(iommu), mr_name, UINT64_MAX); 436 address_space_init(&iommu->as, &iommu->mr, as_name); 437 table->iommu[PCI_SLOT(devfn)] = iommu; 438 439 g_free(mr_name); 440 g_free(as_name); 441 } 442 443 return iommu; 444 } 445 446 static AddressSpace *s390_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn) 447 { 448 S390pciState *s = opaque; 449 S390PCIIOMMU *iommu = s390_pci_get_iommu(s, bus, devfn); 450 451 return &iommu->as; 452 } 453 454 static uint8_t set_ind_atomic(uint64_t ind_loc, uint8_t to_be_set) 455 { 456 uint8_t ind_old, ind_new; 457 hwaddr len = 1; 458 uint8_t *ind_addr; 459 460 ind_addr = cpu_physical_memory_map(ind_loc, &len, 1); 461 if (!ind_addr) { 462 s390_pci_generate_error_event(ERR_EVENT_AIRERR, 0, 0, 0, 0); 463 return -1; 464 } 465 do { 466 ind_old = *ind_addr; 467 ind_new = ind_old | to_be_set; 468 } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old); 469 cpu_physical_memory_unmap(ind_addr, len, 1, len); 470 471 return ind_old; 472 } 473 474 static void s390_msi_ctrl_write(void *opaque, hwaddr addr, uint64_t data, 475 unsigned int size) 476 { 477 S390PCIBusDevice *pbdev = opaque; 478 uint32_t idx = data >> ZPCI_MSI_VEC_BITS; 479 uint32_t vec = data & ZPCI_MSI_VEC_MASK; 480 uint64_t ind_bit; 481 uint32_t sum_bit; 482 uint32_t e = 0; 483 484 DPRINTF("write_msix data 0x%" PRIx64 " idx %d vec 0x%x\n", data, idx, vec); 485 486 if (!pbdev) { 487 e |= (vec << ERR_EVENT_MVN_OFFSET); 488 s390_pci_generate_error_event(ERR_EVENT_NOMSI, idx, 0, addr, e); 489 return; 490 } 491 492 if (pbdev->state != ZPCI_FS_ENABLED) { 493 return; 494 } 495 496 ind_bit = pbdev->routes.adapter.ind_offset; 497 sum_bit = pbdev->routes.adapter.summary_offset; 498 499 set_ind_atomic(pbdev->routes.adapter.ind_addr + (ind_bit + vec) / 8, 500 0x80 >> ((ind_bit + vec) % 8)); 501 if (!set_ind_atomic(pbdev->routes.adapter.summary_addr + sum_bit / 8, 502 0x80 >> (sum_bit % 8))) { 503 css_adapter_interrupt(pbdev->isc); 504 } 505 } 506 507 static uint64_t s390_msi_ctrl_read(void *opaque, hwaddr addr, unsigned size) 508 { 509 return 0xffffffff; 510 } 511 512 static const MemoryRegionOps s390_msi_ctrl_ops = { 513 .write = s390_msi_ctrl_write, 514 .read = s390_msi_ctrl_read, 515 .endianness = DEVICE_LITTLE_ENDIAN, 516 }; 517 518 void s390_pci_iommu_enable(S390PCIIOMMU *iommu) 519 { 520 char *name = g_strdup_printf("iommu-s390-%04x", iommu->pbdev->uid); 521 memory_region_init_iommu(&iommu->iommu_mr, sizeof(iommu->iommu_mr), 522 TYPE_S390_IOMMU_MEMORY_REGION, OBJECT(&iommu->mr), 523 name, iommu->pal + 1); 524 iommu->enabled = true; 525 memory_region_add_subregion(&iommu->mr, 0, MEMORY_REGION(&iommu->iommu_mr)); 526 g_free(name); 527 } 528 529 void s390_pci_iommu_disable(S390PCIIOMMU *iommu) 530 { 531 iommu->enabled = false; 532 memory_region_del_subregion(&iommu->mr, MEMORY_REGION(&iommu->iommu_mr)); 533 object_unparent(OBJECT(&iommu->iommu_mr)); 534 } 535 536 static void s390_pci_iommu_free(S390pciState *s, PCIBus *bus, int32_t devfn) 537 { 538 uint64_t key = (uintptr_t)bus; 539 S390PCIIOMMUTable *table = g_hash_table_lookup(s->iommu_table, &key); 540 S390PCIIOMMU *iommu = table ? table->iommu[PCI_SLOT(devfn)] : NULL; 541 542 if (!table || !iommu) { 543 return; 544 } 545 546 table->iommu[PCI_SLOT(devfn)] = NULL; 547 address_space_destroy(&iommu->as); 548 object_unparent(OBJECT(&iommu->mr)); 549 object_unparent(OBJECT(iommu)); 550 object_unref(OBJECT(iommu)); 551 } 552 553 static int s390_pcihost_init(SysBusDevice *dev) 554 { 555 PCIBus *b; 556 BusState *bus; 557 PCIHostState *phb = PCI_HOST_BRIDGE(dev); 558 S390pciState *s = S390_PCI_HOST_BRIDGE(dev); 559 560 DPRINTF("host_init\n"); 561 562 b = pci_register_bus(DEVICE(dev), NULL, 563 s390_pci_set_irq, s390_pci_map_irq, NULL, 564 get_system_memory(), get_system_io(), 0, 64, 565 TYPE_PCI_BUS); 566 pci_setup_iommu(b, s390_pci_dma_iommu, s); 567 568 bus = BUS(b); 569 qbus_set_hotplug_handler(bus, DEVICE(dev), NULL); 570 phb->bus = b; 571 572 s->bus = S390_PCI_BUS(qbus_create(TYPE_S390_PCI_BUS, DEVICE(s), NULL)); 573 qbus_set_hotplug_handler(BUS(s->bus), DEVICE(s), NULL); 574 575 s->iommu_table = g_hash_table_new_full(g_int64_hash, g_int64_equal, 576 NULL, g_free); 577 s->zpci_table = g_hash_table_new_full(g_int_hash, g_int_equal, NULL, NULL); 578 s->bus_no = 0; 579 QTAILQ_INIT(&s->pending_sei); 580 QTAILQ_INIT(&s->zpci_devs); 581 582 css_register_io_adapters(CSS_IO_ADAPTER_PCI, true, false, &error_abort); 583 584 return 0; 585 } 586 587 static int s390_pci_msix_init(S390PCIBusDevice *pbdev) 588 { 589 char *name; 590 uint8_t pos; 591 uint16_t ctrl; 592 uint32_t table, pba; 593 594 pos = pci_find_capability(pbdev->pdev, PCI_CAP_ID_MSIX); 595 if (!pos) { 596 pbdev->msix.available = false; 597 return -1; 598 } 599 600 ctrl = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_FLAGS, 601 pci_config_size(pbdev->pdev), sizeof(ctrl)); 602 table = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_TABLE, 603 pci_config_size(pbdev->pdev), sizeof(table)); 604 pba = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_PBA, 605 pci_config_size(pbdev->pdev), sizeof(pba)); 606 607 pbdev->msix.table_bar = table & PCI_MSIX_FLAGS_BIRMASK; 608 pbdev->msix.table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK; 609 pbdev->msix.pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK; 610 pbdev->msix.pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK; 611 pbdev->msix.entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1; 612 pbdev->msix.available = true; 613 614 name = g_strdup_printf("msix-s390-%04x", pbdev->uid); 615 memory_region_init_io(&pbdev->msix_notify_mr, OBJECT(pbdev), 616 &s390_msi_ctrl_ops, pbdev, name, PAGE_SIZE); 617 memory_region_add_subregion(&pbdev->iommu->mr, ZPCI_MSI_ADDR, 618 &pbdev->msix_notify_mr); 619 g_free(name); 620 621 return 0; 622 } 623 624 static void s390_pci_msix_free(S390PCIBusDevice *pbdev) 625 { 626 memory_region_del_subregion(&pbdev->iommu->mr, &pbdev->msix_notify_mr); 627 object_unparent(OBJECT(&pbdev->msix_notify_mr)); 628 } 629 630 static S390PCIBusDevice *s390_pci_device_new(S390pciState *s, 631 const char *target) 632 { 633 DeviceState *dev = NULL; 634 635 dev = qdev_try_create(BUS(s->bus), TYPE_S390_PCI_DEVICE); 636 if (!dev) { 637 return NULL; 638 } 639 640 qdev_prop_set_string(dev, "target", target); 641 qdev_init_nofail(dev); 642 643 return S390_PCI_DEVICE(dev); 644 } 645 646 static bool s390_pci_alloc_idx(S390pciState *s, S390PCIBusDevice *pbdev) 647 { 648 uint32_t idx; 649 650 idx = s->next_idx; 651 while (s390_pci_find_dev_by_idx(s, idx)) { 652 idx = (idx + 1) & FH_MASK_INDEX; 653 if (idx == s->next_idx) { 654 return false; 655 } 656 } 657 658 pbdev->idx = idx; 659 s->next_idx = (idx + 1) & FH_MASK_INDEX; 660 661 return true; 662 } 663 664 static void s390_pcihost_hot_plug(HotplugHandler *hotplug_dev, 665 DeviceState *dev, Error **errp) 666 { 667 PCIDevice *pdev = NULL; 668 S390PCIBusDevice *pbdev = NULL; 669 S390pciState *s = s390_get_phb(); 670 671 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) { 672 BusState *bus; 673 PCIBridge *pb = PCI_BRIDGE(dev); 674 PCIDevice *pdev = PCI_DEVICE(dev); 675 676 pci_bridge_map_irq(pb, dev->id, s390_pci_map_irq); 677 pci_setup_iommu(&pb->sec_bus, s390_pci_dma_iommu, s); 678 679 bus = BUS(&pb->sec_bus); 680 qbus_set_hotplug_handler(bus, DEVICE(s), errp); 681 682 if (dev->hotplugged) { 683 pci_default_write_config(pdev, PCI_PRIMARY_BUS, s->bus_no, 1); 684 s->bus_no += 1; 685 pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1); 686 do { 687 pdev = pdev->bus->parent_dev; 688 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, 689 s->bus_no, 1); 690 } while (pdev->bus && pci_bus_num(pdev->bus)); 691 } 692 } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { 693 pdev = PCI_DEVICE(dev); 694 695 if (!dev->id) { 696 /* In the case the PCI device does not define an id */ 697 /* we generate one based on the PCI address */ 698 dev->id = g_strdup_printf("auto_%02x:%02x.%01x", 699 pci_bus_num(pdev->bus), 700 PCI_SLOT(pdev->devfn), 701 PCI_FUNC(pdev->devfn)); 702 } 703 704 pbdev = s390_pci_find_dev_by_target(s, dev->id); 705 if (!pbdev) { 706 pbdev = s390_pci_device_new(s, dev->id); 707 if (!pbdev) { 708 error_setg(errp, "create zpci device failed"); 709 return; 710 } 711 } 712 713 if (object_dynamic_cast(OBJECT(dev), "vfio-pci")) { 714 pbdev->fh |= FH_SHM_VFIO; 715 } else { 716 pbdev->fh |= FH_SHM_EMUL; 717 } 718 719 pbdev->pdev = pdev; 720 pbdev->iommu = s390_pci_get_iommu(s, pdev->bus, pdev->devfn); 721 pbdev->iommu->pbdev = pbdev; 722 pbdev->state = ZPCI_FS_STANDBY; 723 724 if (s390_pci_msix_init(pbdev)) { 725 error_setg(errp, "MSI-X support is mandatory " 726 "in the S390 architecture"); 727 return; 728 } 729 730 if (dev->hotplugged) { 731 s390_pci_generate_plug_event(HP_EVENT_RESERVED_TO_STANDBY, 732 pbdev->fh, pbdev->fid); 733 } 734 } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) { 735 pbdev = S390_PCI_DEVICE(dev); 736 737 if (!s390_pci_alloc_idx(s, pbdev)) { 738 error_setg(errp, "no slot for plugging zpci device"); 739 return; 740 } 741 pbdev->fh = pbdev->idx; 742 QTAILQ_INSERT_TAIL(&s->zpci_devs, pbdev, link); 743 g_hash_table_insert(s->zpci_table, &pbdev->idx, pbdev); 744 } 745 } 746 747 static void s390_pcihost_timer_cb(void *opaque) 748 { 749 S390PCIBusDevice *pbdev = opaque; 750 751 if (pbdev->summary_ind) { 752 pci_dereg_irqs(pbdev); 753 } 754 if (pbdev->iommu->enabled) { 755 pci_dereg_ioat(pbdev->iommu); 756 } 757 758 pbdev->state = ZPCI_FS_STANDBY; 759 s390_pci_generate_plug_event(HP_EVENT_CONFIGURED_TO_STBRES, 760 pbdev->fh, pbdev->fid); 761 qdev_unplug(DEVICE(pbdev), NULL); 762 } 763 764 static void s390_pcihost_hot_unplug(HotplugHandler *hotplug_dev, 765 DeviceState *dev, Error **errp) 766 { 767 PCIDevice *pci_dev = NULL; 768 PCIBus *bus; 769 int32_t devfn; 770 S390PCIBusDevice *pbdev = NULL; 771 S390pciState *s = s390_get_phb(); 772 773 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) { 774 error_setg(errp, "PCI bridge hot unplug currently not supported"); 775 return; 776 } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { 777 pci_dev = PCI_DEVICE(dev); 778 779 QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) { 780 if (pbdev->pdev == pci_dev) { 781 break; 782 } 783 } 784 assert(pbdev != NULL); 785 } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) { 786 pbdev = S390_PCI_DEVICE(dev); 787 pci_dev = pbdev->pdev; 788 } 789 790 switch (pbdev->state) { 791 case ZPCI_FS_RESERVED: 792 goto out; 793 case ZPCI_FS_STANDBY: 794 break; 795 default: 796 s390_pci_generate_plug_event(HP_EVENT_DECONFIGURE_REQUEST, 797 pbdev->fh, pbdev->fid); 798 pbdev->release_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, 799 s390_pcihost_timer_cb, 800 pbdev); 801 timer_mod(pbdev->release_timer, 802 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + HOT_UNPLUG_TIMEOUT); 803 return; 804 } 805 806 if (pbdev->release_timer && timer_pending(pbdev->release_timer)) { 807 timer_del(pbdev->release_timer); 808 timer_free(pbdev->release_timer); 809 pbdev->release_timer = NULL; 810 } 811 812 s390_pci_generate_plug_event(HP_EVENT_STANDBY_TO_RESERVED, 813 pbdev->fh, pbdev->fid); 814 bus = pci_dev->bus; 815 devfn = pci_dev->devfn; 816 object_unparent(OBJECT(pci_dev)); 817 s390_pci_msix_free(pbdev); 818 s390_pci_iommu_free(s, bus, devfn); 819 pbdev->pdev = NULL; 820 pbdev->state = ZPCI_FS_RESERVED; 821 out: 822 pbdev->fid = 0; 823 QTAILQ_REMOVE(&s->zpci_devs, pbdev, link); 824 g_hash_table_remove(s->zpci_table, &pbdev->idx); 825 object_unparent(OBJECT(pbdev)); 826 } 827 828 static void s390_pci_enumerate_bridge(PCIBus *bus, PCIDevice *pdev, 829 void *opaque) 830 { 831 S390pciState *s = opaque; 832 unsigned int primary = s->bus_no; 833 unsigned int subordinate = 0xff; 834 PCIBus *sec_bus = NULL; 835 836 if ((pci_default_read_config(pdev, PCI_HEADER_TYPE, 1) != 837 PCI_HEADER_TYPE_BRIDGE)) { 838 return; 839 } 840 841 (s->bus_no)++; 842 pci_default_write_config(pdev, PCI_PRIMARY_BUS, primary, 1); 843 pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1); 844 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1); 845 846 sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev)); 847 if (!sec_bus) { 848 return; 849 } 850 851 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, subordinate, 1); 852 pci_for_each_device(sec_bus, pci_bus_num(sec_bus), 853 s390_pci_enumerate_bridge, s); 854 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1); 855 } 856 857 static void s390_pcihost_reset(DeviceState *dev) 858 { 859 S390pciState *s = S390_PCI_HOST_BRIDGE(dev); 860 PCIBus *bus = s->parent_obj.bus; 861 862 s->bus_no = 0; 863 pci_for_each_device(bus, pci_bus_num(bus), s390_pci_enumerate_bridge, s); 864 } 865 866 static void s390_pcihost_class_init(ObjectClass *klass, void *data) 867 { 868 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); 869 DeviceClass *dc = DEVICE_CLASS(klass); 870 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); 871 872 dc->reset = s390_pcihost_reset; 873 k->init = s390_pcihost_init; 874 hc->plug = s390_pcihost_hot_plug; 875 hc->unplug = s390_pcihost_hot_unplug; 876 msi_nonbroken = true; 877 } 878 879 static const TypeInfo s390_pcihost_info = { 880 .name = TYPE_S390_PCI_HOST_BRIDGE, 881 .parent = TYPE_PCI_HOST_BRIDGE, 882 .instance_size = sizeof(S390pciState), 883 .class_init = s390_pcihost_class_init, 884 .interfaces = (InterfaceInfo[]) { 885 { TYPE_HOTPLUG_HANDLER }, 886 { } 887 } 888 }; 889 890 static const TypeInfo s390_pcibus_info = { 891 .name = TYPE_S390_PCI_BUS, 892 .parent = TYPE_BUS, 893 .instance_size = sizeof(S390PCIBus), 894 }; 895 896 static uint16_t s390_pci_generate_uid(S390pciState *s) 897 { 898 uint16_t uid = 0; 899 900 do { 901 uid++; 902 if (!s390_pci_find_dev_by_uid(s, uid)) { 903 return uid; 904 } 905 } while (uid < ZPCI_MAX_UID); 906 907 return UID_UNDEFINED; 908 } 909 910 static uint32_t s390_pci_generate_fid(S390pciState *s, Error **errp) 911 { 912 uint32_t fid = 0; 913 914 do { 915 if (!s390_pci_find_dev_by_fid(s, fid)) { 916 return fid; 917 } 918 } while (fid++ != ZPCI_MAX_FID); 919 920 error_setg(errp, "no free fid could be found"); 921 return 0; 922 } 923 924 static void s390_pci_device_realize(DeviceState *dev, Error **errp) 925 { 926 S390PCIBusDevice *zpci = S390_PCI_DEVICE(dev); 927 S390pciState *s = s390_get_phb(); 928 929 if (!zpci->target) { 930 error_setg(errp, "target must be defined"); 931 return; 932 } 933 934 if (s390_pci_find_dev_by_target(s, zpci->target)) { 935 error_setg(errp, "target %s already has an associated zpci device", 936 zpci->target); 937 return; 938 } 939 940 if (zpci->uid == UID_UNDEFINED) { 941 zpci->uid = s390_pci_generate_uid(s); 942 if (!zpci->uid) { 943 error_setg(errp, "no free uid could be found"); 944 return; 945 } 946 } else if (s390_pci_find_dev_by_uid(s, zpci->uid)) { 947 error_setg(errp, "uid %u already in use", zpci->uid); 948 return; 949 } 950 951 if (!zpci->fid_defined) { 952 Error *local_error = NULL; 953 954 zpci->fid = s390_pci_generate_fid(s, &local_error); 955 if (local_error) { 956 error_propagate(errp, local_error); 957 return; 958 } 959 } else if (s390_pci_find_dev_by_fid(s, zpci->fid)) { 960 error_setg(errp, "fid %u already in use", zpci->fid); 961 return; 962 } 963 964 zpci->state = ZPCI_FS_RESERVED; 965 } 966 967 static void s390_pci_device_reset(DeviceState *dev) 968 { 969 S390PCIBusDevice *pbdev = S390_PCI_DEVICE(dev); 970 971 switch (pbdev->state) { 972 case ZPCI_FS_RESERVED: 973 return; 974 case ZPCI_FS_STANDBY: 975 break; 976 default: 977 pbdev->fh &= ~FH_MASK_ENABLE; 978 pbdev->state = ZPCI_FS_DISABLED; 979 break; 980 } 981 982 if (pbdev->summary_ind) { 983 pci_dereg_irqs(pbdev); 984 } 985 if (pbdev->iommu->enabled) { 986 pci_dereg_ioat(pbdev->iommu); 987 } 988 989 pbdev->fmb_addr = 0; 990 } 991 992 static void s390_pci_get_fid(Object *obj, Visitor *v, const char *name, 993 void *opaque, Error **errp) 994 { 995 Property *prop = opaque; 996 uint32_t *ptr = qdev_get_prop_ptr(DEVICE(obj), prop); 997 998 visit_type_uint32(v, name, ptr, errp); 999 } 1000 1001 static void s390_pci_set_fid(Object *obj, Visitor *v, const char *name, 1002 void *opaque, Error **errp) 1003 { 1004 DeviceState *dev = DEVICE(obj); 1005 S390PCIBusDevice *zpci = S390_PCI_DEVICE(obj); 1006 Property *prop = opaque; 1007 uint32_t *ptr = qdev_get_prop_ptr(dev, prop); 1008 1009 if (dev->realized) { 1010 qdev_prop_set_after_realize(dev, name, errp); 1011 return; 1012 } 1013 1014 visit_type_uint32(v, name, ptr, errp); 1015 zpci->fid_defined = true; 1016 } 1017 1018 static PropertyInfo s390_pci_fid_propinfo = { 1019 .name = "zpci_fid", 1020 .get = s390_pci_get_fid, 1021 .set = s390_pci_set_fid, 1022 }; 1023 1024 #define DEFINE_PROP_S390_PCI_FID(_n, _s, _f) \ 1025 DEFINE_PROP(_n, _s, _f, s390_pci_fid_propinfo, uint32_t) 1026 1027 static Property s390_pci_device_properties[] = { 1028 DEFINE_PROP_UINT16("uid", S390PCIBusDevice, uid, UID_UNDEFINED), 1029 DEFINE_PROP_S390_PCI_FID("fid", S390PCIBusDevice, fid), 1030 DEFINE_PROP_STRING("target", S390PCIBusDevice, target), 1031 DEFINE_PROP_END_OF_LIST(), 1032 }; 1033 1034 static void s390_pci_device_class_init(ObjectClass *klass, void *data) 1035 { 1036 DeviceClass *dc = DEVICE_CLASS(klass); 1037 1038 dc->desc = "zpci device"; 1039 dc->reset = s390_pci_device_reset; 1040 dc->bus_type = TYPE_S390_PCI_BUS; 1041 dc->realize = s390_pci_device_realize; 1042 dc->props = s390_pci_device_properties; 1043 } 1044 1045 static const TypeInfo s390_pci_device_info = { 1046 .name = TYPE_S390_PCI_DEVICE, 1047 .parent = TYPE_DEVICE, 1048 .instance_size = sizeof(S390PCIBusDevice), 1049 .class_init = s390_pci_device_class_init, 1050 }; 1051 1052 static TypeInfo s390_pci_iommu_info = { 1053 .name = TYPE_S390_PCI_IOMMU, 1054 .parent = TYPE_OBJECT, 1055 .instance_size = sizeof(S390PCIIOMMU), 1056 }; 1057 1058 static void s390_iommu_memory_region_class_init(ObjectClass *klass, void *data) 1059 { 1060 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass); 1061 1062 imrc->translate = s390_translate_iommu; 1063 } 1064 1065 static const TypeInfo s390_iommu_memory_region_info = { 1066 .parent = TYPE_IOMMU_MEMORY_REGION, 1067 .name = TYPE_S390_IOMMU_MEMORY_REGION, 1068 .class_init = s390_iommu_memory_region_class_init, 1069 }; 1070 1071 static void s390_pci_register_types(void) 1072 { 1073 type_register_static(&s390_pcihost_info); 1074 type_register_static(&s390_pcibus_info); 1075 type_register_static(&s390_pci_device_info); 1076 type_register_static(&s390_pci_iommu_info); 1077 type_register_static(&s390_iommu_memory_region_info); 1078 } 1079 1080 type_init(s390_pci_register_types) 1081