1 /* 2 * s390 PCI BUS 3 * 4 * Copyright 2014 IBM Corp. 5 * Author(s): Frank Blaschka <frank.blaschka@de.ibm.com> 6 * Hong Bo Li <lihbbj@cn.ibm.com> 7 * Yi Min Zhao <zyimin@cn.ibm.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2 or (at 10 * your option) any later version. See the COPYING file in the top-level 11 * directory. 12 */ 13 14 #include "qemu/osdep.h" 15 #include "qapi/error.h" 16 #include "qapi/visitor.h" 17 #include "qemu-common.h" 18 #include "cpu.h" 19 #include "s390-pci-bus.h" 20 #include "s390-pci-inst.h" 21 #include "hw/pci/pci_bus.h" 22 #include "hw/pci/pci_bridge.h" 23 #include "hw/pci/msi.h" 24 #include "qemu/error-report.h" 25 26 #ifndef DEBUG_S390PCI_BUS 27 #define DEBUG_S390PCI_BUS 0 28 #endif 29 30 #define DPRINTF(fmt, ...) \ 31 do { \ 32 if (DEBUG_S390PCI_BUS) { \ 33 fprintf(stderr, "S390pci-bus: " fmt, ## __VA_ARGS__); \ 34 } \ 35 } while (0) 36 37 S390pciState *s390_get_phb(void) 38 { 39 static S390pciState *phb; 40 41 if (!phb) { 42 phb = S390_PCI_HOST_BRIDGE( 43 object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL)); 44 assert(phb != NULL); 45 } 46 47 return phb; 48 } 49 50 int pci_chsc_sei_nt2_get_event(void *res) 51 { 52 ChscSeiNt2Res *nt2_res = (ChscSeiNt2Res *)res; 53 PciCcdfAvail *accdf; 54 PciCcdfErr *eccdf; 55 int rc = 1; 56 SeiContainer *sei_cont; 57 S390pciState *s = s390_get_phb(); 58 59 sei_cont = QTAILQ_FIRST(&s->pending_sei); 60 if (sei_cont) { 61 QTAILQ_REMOVE(&s->pending_sei, sei_cont, link); 62 nt2_res->nt = 2; 63 nt2_res->cc = sei_cont->cc; 64 nt2_res->length = cpu_to_be16(sizeof(ChscSeiNt2Res)); 65 switch (sei_cont->cc) { 66 case 1: /* error event */ 67 eccdf = (PciCcdfErr *)nt2_res->ccdf; 68 eccdf->fid = cpu_to_be32(sei_cont->fid); 69 eccdf->fh = cpu_to_be32(sei_cont->fh); 70 eccdf->e = cpu_to_be32(sei_cont->e); 71 eccdf->faddr = cpu_to_be64(sei_cont->faddr); 72 eccdf->pec = cpu_to_be16(sei_cont->pec); 73 break; 74 case 2: /* availability event */ 75 accdf = (PciCcdfAvail *)nt2_res->ccdf; 76 accdf->fid = cpu_to_be32(sei_cont->fid); 77 accdf->fh = cpu_to_be32(sei_cont->fh); 78 accdf->pec = cpu_to_be16(sei_cont->pec); 79 break; 80 default: 81 abort(); 82 } 83 g_free(sei_cont); 84 rc = 0; 85 } 86 87 return rc; 88 } 89 90 int pci_chsc_sei_nt2_have_event(void) 91 { 92 S390pciState *s = s390_get_phb(); 93 94 return !QTAILQ_EMPTY(&s->pending_sei); 95 } 96 97 S390PCIBusDevice *s390_pci_find_next_avail_dev(S390pciState *s, 98 S390PCIBusDevice *pbdev) 99 { 100 S390PCIBusDevice *ret = pbdev ? QTAILQ_NEXT(pbdev, link) : 101 QTAILQ_FIRST(&s->zpci_devs); 102 103 while (ret && ret->state == ZPCI_FS_RESERVED) { 104 ret = QTAILQ_NEXT(ret, link); 105 } 106 107 return ret; 108 } 109 110 S390PCIBusDevice *s390_pci_find_dev_by_fid(S390pciState *s, uint32_t fid) 111 { 112 S390PCIBusDevice *pbdev; 113 114 QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) { 115 if (pbdev->fid == fid) { 116 return pbdev; 117 } 118 } 119 120 return NULL; 121 } 122 123 void s390_pci_sclp_configure(SCCB *sccb) 124 { 125 IoaCfgSccb *psccb = (IoaCfgSccb *)sccb; 126 S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(s390_get_phb(), 127 be32_to_cpu(psccb->aid)); 128 uint16_t rc; 129 130 if (!pbdev) { 131 DPRINTF("sclp config no dev found\n"); 132 rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED; 133 goto out; 134 } 135 136 switch (pbdev->state) { 137 case ZPCI_FS_RESERVED: 138 rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE; 139 break; 140 case ZPCI_FS_STANDBY: 141 pbdev->state = ZPCI_FS_DISABLED; 142 rc = SCLP_RC_NORMAL_COMPLETION; 143 break; 144 default: 145 rc = SCLP_RC_NO_ACTION_REQUIRED; 146 } 147 out: 148 psccb->header.response_code = cpu_to_be16(rc); 149 } 150 151 void s390_pci_sclp_deconfigure(SCCB *sccb) 152 { 153 IoaCfgSccb *psccb = (IoaCfgSccb *)sccb; 154 S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(s390_get_phb(), 155 be32_to_cpu(psccb->aid)); 156 uint16_t rc; 157 158 if (!pbdev) { 159 DPRINTF("sclp deconfig no dev found\n"); 160 rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED; 161 goto out; 162 } 163 164 switch (pbdev->state) { 165 case ZPCI_FS_RESERVED: 166 rc = SCLP_RC_ADAPTER_IN_RESERVED_STATE; 167 break; 168 case ZPCI_FS_STANDBY: 169 rc = SCLP_RC_NO_ACTION_REQUIRED; 170 break; 171 default: 172 if (pbdev->summary_ind) { 173 pci_dereg_irqs(pbdev); 174 } 175 if (pbdev->iommu->enabled) { 176 pci_dereg_ioat(pbdev->iommu); 177 } 178 pbdev->state = ZPCI_FS_STANDBY; 179 rc = SCLP_RC_NORMAL_COMPLETION; 180 181 if (pbdev->release_timer) { 182 qdev_unplug(DEVICE(pbdev->pdev), NULL); 183 } 184 } 185 out: 186 psccb->header.response_code = cpu_to_be16(rc); 187 } 188 189 static S390PCIBusDevice *s390_pci_find_dev_by_uid(S390pciState *s, uint16_t uid) 190 { 191 S390PCIBusDevice *pbdev; 192 193 QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) { 194 if (pbdev->uid == uid) { 195 return pbdev; 196 } 197 } 198 199 return NULL; 200 } 201 202 S390PCIBusDevice *s390_pci_find_dev_by_target(S390pciState *s, 203 const char *target) 204 { 205 S390PCIBusDevice *pbdev; 206 207 if (!target) { 208 return NULL; 209 } 210 211 QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) { 212 if (!strcmp(pbdev->target, target)) { 213 return pbdev; 214 } 215 } 216 217 return NULL; 218 } 219 220 S390PCIBusDevice *s390_pci_find_dev_by_idx(S390pciState *s, uint32_t idx) 221 { 222 return g_hash_table_lookup(s->zpci_table, &idx); 223 } 224 225 S390PCIBusDevice *s390_pci_find_dev_by_fh(S390pciState *s, uint32_t fh) 226 { 227 uint32_t idx = FH_MASK_INDEX & fh; 228 S390PCIBusDevice *pbdev = s390_pci_find_dev_by_idx(s, idx); 229 230 if (pbdev && pbdev->fh == fh) { 231 return pbdev; 232 } 233 234 return NULL; 235 } 236 237 static void s390_pci_generate_event(uint8_t cc, uint16_t pec, uint32_t fh, 238 uint32_t fid, uint64_t faddr, uint32_t e) 239 { 240 SeiContainer *sei_cont; 241 S390pciState *s = s390_get_phb(); 242 243 sei_cont = g_new0(SeiContainer, 1); 244 sei_cont->fh = fh; 245 sei_cont->fid = fid; 246 sei_cont->cc = cc; 247 sei_cont->pec = pec; 248 sei_cont->faddr = faddr; 249 sei_cont->e = e; 250 251 QTAILQ_INSERT_TAIL(&s->pending_sei, sei_cont, link); 252 css_generate_css_crws(0); 253 } 254 255 static void s390_pci_generate_plug_event(uint16_t pec, uint32_t fh, 256 uint32_t fid) 257 { 258 s390_pci_generate_event(2, pec, fh, fid, 0, 0); 259 } 260 261 void s390_pci_generate_error_event(uint16_t pec, uint32_t fh, uint32_t fid, 262 uint64_t faddr, uint32_t e) 263 { 264 s390_pci_generate_event(1, pec, fh, fid, faddr, e); 265 } 266 267 static void s390_pci_set_irq(void *opaque, int irq, int level) 268 { 269 /* nothing to do */ 270 } 271 272 static int s390_pci_map_irq(PCIDevice *pci_dev, int irq_num) 273 { 274 /* nothing to do */ 275 return 0; 276 } 277 278 static uint64_t s390_pci_get_table_origin(uint64_t iota) 279 { 280 return iota & ~ZPCI_IOTA_RTTO_FLAG; 281 } 282 283 static unsigned int calc_rtx(dma_addr_t ptr) 284 { 285 return ((unsigned long) ptr >> ZPCI_RT_SHIFT) & ZPCI_INDEX_MASK; 286 } 287 288 static unsigned int calc_sx(dma_addr_t ptr) 289 { 290 return ((unsigned long) ptr >> ZPCI_ST_SHIFT) & ZPCI_INDEX_MASK; 291 } 292 293 static unsigned int calc_px(dma_addr_t ptr) 294 { 295 return ((unsigned long) ptr >> PAGE_SHIFT) & ZPCI_PT_MASK; 296 } 297 298 static uint64_t get_rt_sto(uint64_t entry) 299 { 300 return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_RTX) 301 ? (entry & ZPCI_RTE_ADDR_MASK) 302 : 0; 303 } 304 305 static uint64_t get_st_pto(uint64_t entry) 306 { 307 return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_SX) 308 ? (entry & ZPCI_STE_ADDR_MASK) 309 : 0; 310 } 311 312 static bool rt_entry_isvalid(uint64_t entry) 313 { 314 return (entry & ZPCI_TABLE_VALID_MASK) == ZPCI_TABLE_VALID; 315 } 316 317 static bool pt_entry_isvalid(uint64_t entry) 318 { 319 return (entry & ZPCI_PTE_VALID_MASK) == ZPCI_PTE_VALID; 320 } 321 322 static bool entry_isprotected(uint64_t entry) 323 { 324 return (entry & ZPCI_TABLE_PROT_MASK) == ZPCI_TABLE_PROTECTED; 325 } 326 327 /* ett is expected table type, -1 page table, 0 segment table, 1 region table */ 328 static uint64_t get_table_index(uint64_t iova, int8_t ett) 329 { 330 switch (ett) { 331 case ZPCI_ETT_PT: 332 return calc_px(iova); 333 case ZPCI_ETT_ST: 334 return calc_sx(iova); 335 case ZPCI_ETT_RT: 336 return calc_rtx(iova); 337 } 338 339 return -1; 340 } 341 342 static bool entry_isvalid(uint64_t entry, int8_t ett) 343 { 344 switch (ett) { 345 case ZPCI_ETT_PT: 346 return pt_entry_isvalid(entry); 347 case ZPCI_ETT_ST: 348 case ZPCI_ETT_RT: 349 return rt_entry_isvalid(entry); 350 } 351 352 return false; 353 } 354 355 /* Return true if address translation is done */ 356 static bool translate_iscomplete(uint64_t entry, int8_t ett) 357 { 358 switch (ett) { 359 case 0: 360 return (entry & ZPCI_TABLE_FC) ? true : false; 361 case 1: 362 return false; 363 } 364 365 return true; 366 } 367 368 static uint64_t get_frame_size(int8_t ett) 369 { 370 switch (ett) { 371 case ZPCI_ETT_PT: 372 return 1ULL << 12; 373 case ZPCI_ETT_ST: 374 return 1ULL << 20; 375 case ZPCI_ETT_RT: 376 return 1ULL << 31; 377 } 378 379 return 0; 380 } 381 382 static uint64_t get_next_table_origin(uint64_t entry, int8_t ett) 383 { 384 switch (ett) { 385 case ZPCI_ETT_PT: 386 return entry & ZPCI_PTE_ADDR_MASK; 387 case ZPCI_ETT_ST: 388 return get_st_pto(entry); 389 case ZPCI_ETT_RT: 390 return get_rt_sto(entry); 391 } 392 393 return 0; 394 } 395 396 /** 397 * table_translate: do translation within one table and return the following 398 * table origin 399 * 400 * @entry: the entry being translated, the result is stored in this. 401 * @to: the address of table origin. 402 * @ett: expected table type, 1 region table, 0 segment table and -1 page table. 403 * @error: error code 404 */ 405 static uint64_t table_translate(S390IOTLBEntry *entry, uint64_t to, int8_t ett, 406 uint16_t *error) 407 { 408 uint64_t tx, te, nto = 0; 409 uint16_t err = 0; 410 411 tx = get_table_index(entry->iova, ett); 412 te = address_space_ldq(&address_space_memory, to + tx * sizeof(uint64_t), 413 MEMTXATTRS_UNSPECIFIED, NULL); 414 415 if (!te) { 416 err = ERR_EVENT_INVALTE; 417 goto out; 418 } 419 420 if (!entry_isvalid(te, ett)) { 421 entry->perm &= IOMMU_NONE; 422 goto out; 423 } 424 425 if (ett == ZPCI_ETT_RT && ((te & ZPCI_TABLE_LEN_RTX) != ZPCI_TABLE_LEN_RTX 426 || te & ZPCI_TABLE_OFFSET_MASK)) { 427 err = ERR_EVENT_INVALTL; 428 goto out; 429 } 430 431 nto = get_next_table_origin(te, ett); 432 if (!nto) { 433 err = ERR_EVENT_TT; 434 goto out; 435 } 436 437 if (entry_isprotected(te)) { 438 entry->perm &= IOMMU_RO; 439 } else { 440 entry->perm &= IOMMU_RW; 441 } 442 443 if (translate_iscomplete(te, ett)) { 444 switch (ett) { 445 case ZPCI_ETT_PT: 446 entry->translated_addr = te & ZPCI_PTE_ADDR_MASK; 447 break; 448 case ZPCI_ETT_ST: 449 entry->translated_addr = (te & ZPCI_SFAA_MASK) | 450 (entry->iova & ~ZPCI_SFAA_MASK); 451 break; 452 } 453 nto = 0; 454 } 455 out: 456 if (err) { 457 entry->perm = IOMMU_NONE; 458 *error = err; 459 } 460 entry->len = get_frame_size(ett); 461 return nto; 462 } 463 464 uint16_t s390_guest_io_table_walk(uint64_t g_iota, hwaddr addr, 465 S390IOTLBEntry *entry) 466 { 467 uint64_t to = s390_pci_get_table_origin(g_iota); 468 int8_t ett = 1; 469 uint16_t error = 0; 470 471 entry->iova = addr & PAGE_MASK; 472 entry->translated_addr = 0; 473 entry->perm = IOMMU_RW; 474 475 if (entry_isprotected(g_iota)) { 476 entry->perm &= IOMMU_RO; 477 } 478 479 while (to) { 480 to = table_translate(entry, to, ett--, &error); 481 } 482 483 return error; 484 } 485 486 static IOMMUTLBEntry s390_translate_iommu(IOMMUMemoryRegion *mr, hwaddr addr, 487 IOMMUAccessFlags flag, int iommu_idx) 488 { 489 S390PCIIOMMU *iommu = container_of(mr, S390PCIIOMMU, iommu_mr); 490 S390IOTLBEntry *entry; 491 uint64_t iova = addr & PAGE_MASK; 492 uint16_t error = 0; 493 IOMMUTLBEntry ret = { 494 .target_as = &address_space_memory, 495 .iova = 0, 496 .translated_addr = 0, 497 .addr_mask = ~(hwaddr)0, 498 .perm = IOMMU_NONE, 499 }; 500 501 switch (iommu->pbdev->state) { 502 case ZPCI_FS_ENABLED: 503 case ZPCI_FS_BLOCKED: 504 if (!iommu->enabled) { 505 return ret; 506 } 507 break; 508 default: 509 return ret; 510 } 511 512 DPRINTF("iommu trans addr 0x%" PRIx64 "\n", addr); 513 514 if (addr < iommu->pba || addr > iommu->pal) { 515 error = ERR_EVENT_OORANGE; 516 goto err; 517 } 518 519 entry = g_hash_table_lookup(iommu->iotlb, &iova); 520 if (entry) { 521 ret.iova = entry->iova; 522 ret.translated_addr = entry->translated_addr; 523 ret.addr_mask = entry->len - 1; 524 ret.perm = entry->perm; 525 } else { 526 ret.iova = iova; 527 ret.addr_mask = ~PAGE_MASK; 528 ret.perm = IOMMU_NONE; 529 } 530 531 if (flag != IOMMU_NONE && !(flag & ret.perm)) { 532 error = ERR_EVENT_TPROTE; 533 } 534 err: 535 if (error) { 536 iommu->pbdev->state = ZPCI_FS_ERROR; 537 s390_pci_generate_error_event(error, iommu->pbdev->fh, 538 iommu->pbdev->fid, addr, 0); 539 } 540 return ret; 541 } 542 543 static void s390_pci_iommu_replay(IOMMUMemoryRegion *iommu, 544 IOMMUNotifier *notifier) 545 { 546 /* It's impossible to plug a pci device on s390x that already has iommu 547 * mappings which need to be replayed, that is due to the "one iommu per 548 * zpci device" construct. But when we support migration of vfio-pci 549 * devices in future, we need to revisit this. 550 */ 551 return; 552 } 553 554 static S390PCIIOMMU *s390_pci_get_iommu(S390pciState *s, PCIBus *bus, 555 int devfn) 556 { 557 uint64_t key = (uintptr_t)bus; 558 S390PCIIOMMUTable *table = g_hash_table_lookup(s->iommu_table, &key); 559 S390PCIIOMMU *iommu; 560 561 if (!table) { 562 table = g_new0(S390PCIIOMMUTable, 1); 563 table->key = key; 564 g_hash_table_insert(s->iommu_table, &table->key, table); 565 } 566 567 iommu = table->iommu[PCI_SLOT(devfn)]; 568 if (!iommu) { 569 iommu = S390_PCI_IOMMU(object_new(TYPE_S390_PCI_IOMMU)); 570 571 char *mr_name = g_strdup_printf("iommu-root-%02x:%02x.%01x", 572 pci_bus_num(bus), 573 PCI_SLOT(devfn), 574 PCI_FUNC(devfn)); 575 char *as_name = g_strdup_printf("iommu-pci-%02x:%02x.%01x", 576 pci_bus_num(bus), 577 PCI_SLOT(devfn), 578 PCI_FUNC(devfn)); 579 memory_region_init(&iommu->mr, OBJECT(iommu), mr_name, UINT64_MAX); 580 address_space_init(&iommu->as, &iommu->mr, as_name); 581 iommu->iotlb = g_hash_table_new_full(g_int64_hash, g_int64_equal, 582 NULL, g_free); 583 table->iommu[PCI_SLOT(devfn)] = iommu; 584 585 g_free(mr_name); 586 g_free(as_name); 587 } 588 589 return iommu; 590 } 591 592 static AddressSpace *s390_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn) 593 { 594 S390pciState *s = opaque; 595 S390PCIIOMMU *iommu = s390_pci_get_iommu(s, bus, devfn); 596 597 return &iommu->as; 598 } 599 600 static uint8_t set_ind_atomic(uint64_t ind_loc, uint8_t to_be_set) 601 { 602 uint8_t ind_old, ind_new; 603 hwaddr len = 1; 604 uint8_t *ind_addr; 605 606 ind_addr = cpu_physical_memory_map(ind_loc, &len, 1); 607 if (!ind_addr) { 608 s390_pci_generate_error_event(ERR_EVENT_AIRERR, 0, 0, 0, 0); 609 return -1; 610 } 611 do { 612 ind_old = *ind_addr; 613 ind_new = ind_old | to_be_set; 614 } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old); 615 cpu_physical_memory_unmap(ind_addr, len, 1, len); 616 617 return ind_old; 618 } 619 620 static void s390_msi_ctrl_write(void *opaque, hwaddr addr, uint64_t data, 621 unsigned int size) 622 { 623 S390PCIBusDevice *pbdev = opaque; 624 uint32_t vec = data & ZPCI_MSI_VEC_MASK; 625 uint64_t ind_bit; 626 uint32_t sum_bit; 627 628 assert(pbdev); 629 DPRINTF("write_msix data 0x%" PRIx64 " idx %d vec 0x%x\n", data, 630 pbdev->idx, vec); 631 632 if (pbdev->state != ZPCI_FS_ENABLED) { 633 return; 634 } 635 636 ind_bit = pbdev->routes.adapter.ind_offset; 637 sum_bit = pbdev->routes.adapter.summary_offset; 638 639 set_ind_atomic(pbdev->routes.adapter.ind_addr + (ind_bit + vec) / 8, 640 0x80 >> ((ind_bit + vec) % 8)); 641 if (!set_ind_atomic(pbdev->routes.adapter.summary_addr + sum_bit / 8, 642 0x80 >> (sum_bit % 8))) { 643 css_adapter_interrupt(CSS_IO_ADAPTER_PCI, pbdev->isc); 644 } 645 } 646 647 static uint64_t s390_msi_ctrl_read(void *opaque, hwaddr addr, unsigned size) 648 { 649 return 0xffffffff; 650 } 651 652 static const MemoryRegionOps s390_msi_ctrl_ops = { 653 .write = s390_msi_ctrl_write, 654 .read = s390_msi_ctrl_read, 655 .endianness = DEVICE_LITTLE_ENDIAN, 656 }; 657 658 void s390_pci_iommu_enable(S390PCIIOMMU *iommu) 659 { 660 char *name = g_strdup_printf("iommu-s390-%04x", iommu->pbdev->uid); 661 memory_region_init_iommu(&iommu->iommu_mr, sizeof(iommu->iommu_mr), 662 TYPE_S390_IOMMU_MEMORY_REGION, OBJECT(&iommu->mr), 663 name, iommu->pal + 1); 664 iommu->enabled = true; 665 memory_region_add_subregion(&iommu->mr, 0, MEMORY_REGION(&iommu->iommu_mr)); 666 g_free(name); 667 } 668 669 void s390_pci_iommu_disable(S390PCIIOMMU *iommu) 670 { 671 iommu->enabled = false; 672 g_hash_table_remove_all(iommu->iotlb); 673 memory_region_del_subregion(&iommu->mr, MEMORY_REGION(&iommu->iommu_mr)); 674 object_unparent(OBJECT(&iommu->iommu_mr)); 675 } 676 677 static void s390_pci_iommu_free(S390pciState *s, PCIBus *bus, int32_t devfn) 678 { 679 uint64_t key = (uintptr_t)bus; 680 S390PCIIOMMUTable *table = g_hash_table_lookup(s->iommu_table, &key); 681 S390PCIIOMMU *iommu = table ? table->iommu[PCI_SLOT(devfn)] : NULL; 682 683 if (!table || !iommu) { 684 return; 685 } 686 687 table->iommu[PCI_SLOT(devfn)] = NULL; 688 g_hash_table_destroy(iommu->iotlb); 689 address_space_destroy(&iommu->as); 690 object_unparent(OBJECT(&iommu->mr)); 691 object_unparent(OBJECT(iommu)); 692 object_unref(OBJECT(iommu)); 693 } 694 695 static void s390_pcihost_realize(DeviceState *dev, Error **errp) 696 { 697 PCIBus *b; 698 BusState *bus; 699 PCIHostState *phb = PCI_HOST_BRIDGE(dev); 700 S390pciState *s = S390_PCI_HOST_BRIDGE(dev); 701 Error *local_err = NULL; 702 703 DPRINTF("host_init\n"); 704 705 b = pci_register_root_bus(dev, NULL, s390_pci_set_irq, s390_pci_map_irq, 706 NULL, get_system_memory(), get_system_io(), 0, 707 64, TYPE_PCI_BUS); 708 pci_setup_iommu(b, s390_pci_dma_iommu, s); 709 710 bus = BUS(b); 711 qbus_set_hotplug_handler(bus, dev, &local_err); 712 if (local_err) { 713 error_propagate(errp, local_err); 714 return; 715 } 716 phb->bus = b; 717 718 s->bus = S390_PCI_BUS(qbus_create(TYPE_S390_PCI_BUS, dev, NULL)); 719 qbus_set_hotplug_handler(BUS(s->bus), dev, &local_err); 720 if (local_err) { 721 error_propagate(errp, local_err); 722 return; 723 } 724 725 s->iommu_table = g_hash_table_new_full(g_int64_hash, g_int64_equal, 726 NULL, g_free); 727 s->zpci_table = g_hash_table_new_full(g_int_hash, g_int_equal, NULL, NULL); 728 s->bus_no = 0; 729 QTAILQ_INIT(&s->pending_sei); 730 QTAILQ_INIT(&s->zpci_devs); 731 732 css_register_io_adapters(CSS_IO_ADAPTER_PCI, true, false, 733 S390_ADAPTER_SUPPRESSIBLE, &local_err); 734 error_propagate(errp, local_err); 735 } 736 737 static int s390_pci_msix_init(S390PCIBusDevice *pbdev) 738 { 739 char *name; 740 uint8_t pos; 741 uint16_t ctrl; 742 uint32_t table, pba; 743 744 pos = pci_find_capability(pbdev->pdev, PCI_CAP_ID_MSIX); 745 if (!pos) { 746 return -1; 747 } 748 749 ctrl = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_FLAGS, 750 pci_config_size(pbdev->pdev), sizeof(ctrl)); 751 table = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_TABLE, 752 pci_config_size(pbdev->pdev), sizeof(table)); 753 pba = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_PBA, 754 pci_config_size(pbdev->pdev), sizeof(pba)); 755 756 pbdev->msix.table_bar = table & PCI_MSIX_FLAGS_BIRMASK; 757 pbdev->msix.table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK; 758 pbdev->msix.pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK; 759 pbdev->msix.pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK; 760 pbdev->msix.entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1; 761 762 name = g_strdup_printf("msix-s390-%04x", pbdev->uid); 763 memory_region_init_io(&pbdev->msix_notify_mr, OBJECT(pbdev), 764 &s390_msi_ctrl_ops, pbdev, name, PAGE_SIZE); 765 memory_region_add_subregion(&pbdev->iommu->mr, ZPCI_MSI_ADDR, 766 &pbdev->msix_notify_mr); 767 g_free(name); 768 769 return 0; 770 } 771 772 static void s390_pci_msix_free(S390PCIBusDevice *pbdev) 773 { 774 memory_region_del_subregion(&pbdev->iommu->mr, &pbdev->msix_notify_mr); 775 object_unparent(OBJECT(&pbdev->msix_notify_mr)); 776 } 777 778 static S390PCIBusDevice *s390_pci_device_new(S390pciState *s, 779 const char *target, Error **errp) 780 { 781 Error *local_err = NULL; 782 DeviceState *dev; 783 784 dev = qdev_try_create(BUS(s->bus), TYPE_S390_PCI_DEVICE); 785 if (!dev) { 786 error_setg(errp, "zPCI device could not be created"); 787 return NULL; 788 } 789 790 object_property_set_str(OBJECT(dev), target, "target", &local_err); 791 if (local_err) { 792 object_unparent(OBJECT(dev)); 793 error_propagate_prepend(errp, local_err, 794 "zPCI device could not be created: "); 795 return NULL; 796 } 797 object_property_set_bool(OBJECT(dev), true, "realized", &local_err); 798 if (local_err) { 799 object_unparent(OBJECT(dev)); 800 error_propagate_prepend(errp, local_err, 801 "zPCI device could not be created: "); 802 return NULL; 803 } 804 805 return S390_PCI_DEVICE(dev); 806 } 807 808 static bool s390_pci_alloc_idx(S390pciState *s, S390PCIBusDevice *pbdev) 809 { 810 uint32_t idx; 811 812 idx = s->next_idx; 813 while (s390_pci_find_dev_by_idx(s, idx)) { 814 idx = (idx + 1) & FH_MASK_INDEX; 815 if (idx == s->next_idx) { 816 return false; 817 } 818 } 819 820 pbdev->idx = idx; 821 s->next_idx = (idx + 1) & FH_MASK_INDEX; 822 823 return true; 824 } 825 826 static void s390_pcihost_hot_plug(HotplugHandler *hotplug_dev, 827 DeviceState *dev, Error **errp) 828 { 829 PCIDevice *pdev = NULL; 830 S390PCIBusDevice *pbdev = NULL; 831 S390pciState *s = s390_get_phb(); 832 833 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) { 834 BusState *bus; 835 PCIBridge *pb = PCI_BRIDGE(dev); 836 PCIDevice *pdev = PCI_DEVICE(dev); 837 838 if (pdev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { 839 error_setg(errp, "multifunction not supported in s390"); 840 return; 841 } 842 843 pci_bridge_map_irq(pb, dev->id, s390_pci_map_irq); 844 pci_setup_iommu(&pb->sec_bus, s390_pci_dma_iommu, s); 845 846 bus = BUS(&pb->sec_bus); 847 qbus_set_hotplug_handler(bus, DEVICE(s), errp); 848 849 if (dev->hotplugged) { 850 pci_default_write_config(pdev, PCI_PRIMARY_BUS, s->bus_no, 1); 851 s->bus_no += 1; 852 pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1); 853 do { 854 pdev = pci_get_bus(pdev)->parent_dev; 855 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, 856 s->bus_no, 1); 857 } while (pci_get_bus(pdev) && pci_dev_bus_num(pdev)); 858 } 859 } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { 860 pdev = PCI_DEVICE(dev); 861 862 if (pdev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) { 863 error_setg(errp, "multifunction not supported in s390"); 864 return; 865 } 866 867 if (!dev->id) { 868 /* In the case the PCI device does not define an id */ 869 /* we generate one based on the PCI address */ 870 dev->id = g_strdup_printf("auto_%02x:%02x.%01x", 871 pci_dev_bus_num(pdev), 872 PCI_SLOT(pdev->devfn), 873 PCI_FUNC(pdev->devfn)); 874 } 875 876 pbdev = s390_pci_find_dev_by_target(s, dev->id); 877 if (!pbdev) { 878 pbdev = s390_pci_device_new(s, dev->id, errp); 879 if (!pbdev) { 880 return; 881 } 882 } 883 884 if (object_dynamic_cast(OBJECT(dev), "vfio-pci")) { 885 pbdev->fh |= FH_SHM_VFIO; 886 } else { 887 pbdev->fh |= FH_SHM_EMUL; 888 } 889 890 pbdev->pdev = pdev; 891 pbdev->iommu = s390_pci_get_iommu(s, pci_get_bus(pdev), pdev->devfn); 892 pbdev->iommu->pbdev = pbdev; 893 pbdev->state = ZPCI_FS_DISABLED; 894 895 if (s390_pci_msix_init(pbdev)) { 896 error_setg(errp, "MSI-X support is mandatory " 897 "in the S390 architecture"); 898 return; 899 } 900 901 if (dev->hotplugged) { 902 s390_pci_generate_plug_event(HP_EVENT_RESERVED_TO_STANDBY, 903 pbdev->fh, pbdev->fid); 904 } 905 } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) { 906 pbdev = S390_PCI_DEVICE(dev); 907 908 if (!s390_pci_alloc_idx(s, pbdev)) { 909 error_setg(errp, "no slot for plugging zpci device"); 910 return; 911 } 912 pbdev->fh = pbdev->idx; 913 QTAILQ_INSERT_TAIL(&s->zpci_devs, pbdev, link); 914 g_hash_table_insert(s->zpci_table, &pbdev->idx, pbdev); 915 } 916 } 917 918 static void s390_pcihost_timer_cb(void *opaque) 919 { 920 S390PCIBusDevice *pbdev = opaque; 921 922 if (pbdev->summary_ind) { 923 pci_dereg_irqs(pbdev); 924 } 925 if (pbdev->iommu->enabled) { 926 pci_dereg_ioat(pbdev->iommu); 927 } 928 929 pbdev->state = ZPCI_FS_STANDBY; 930 s390_pci_generate_plug_event(HP_EVENT_CONFIGURED_TO_STBRES, 931 pbdev->fh, pbdev->fid); 932 qdev_unplug(DEVICE(pbdev), NULL); 933 } 934 935 static void s390_pcihost_hot_unplug(HotplugHandler *hotplug_dev, 936 DeviceState *dev, Error **errp) 937 { 938 PCIDevice *pci_dev = NULL; 939 PCIBus *bus; 940 int32_t devfn; 941 S390PCIBusDevice *pbdev = NULL; 942 S390pciState *s = s390_get_phb(); 943 944 if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) { 945 error_setg(errp, "PCI bridge hot unplug currently not supported"); 946 return; 947 } else if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_DEVICE)) { 948 pci_dev = PCI_DEVICE(dev); 949 950 QTAILQ_FOREACH(pbdev, &s->zpci_devs, link) { 951 if (pbdev->pdev == pci_dev) { 952 break; 953 } 954 } 955 assert(pbdev != NULL); 956 } else if (object_dynamic_cast(OBJECT(dev), TYPE_S390_PCI_DEVICE)) { 957 pbdev = S390_PCI_DEVICE(dev); 958 pci_dev = pbdev->pdev; 959 } 960 961 switch (pbdev->state) { 962 case ZPCI_FS_RESERVED: 963 goto out; 964 case ZPCI_FS_STANDBY: 965 break; 966 default: 967 s390_pci_generate_plug_event(HP_EVENT_DECONFIGURE_REQUEST, 968 pbdev->fh, pbdev->fid); 969 pbdev->release_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, 970 s390_pcihost_timer_cb, 971 pbdev); 972 timer_mod(pbdev->release_timer, 973 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + HOT_UNPLUG_TIMEOUT); 974 return; 975 } 976 977 if (pbdev->release_timer && timer_pending(pbdev->release_timer)) { 978 timer_del(pbdev->release_timer); 979 timer_free(pbdev->release_timer); 980 pbdev->release_timer = NULL; 981 } 982 983 s390_pci_generate_plug_event(HP_EVENT_STANDBY_TO_RESERVED, 984 pbdev->fh, pbdev->fid); 985 bus = pci_get_bus(pci_dev); 986 devfn = pci_dev->devfn; 987 object_unparent(OBJECT(pci_dev)); 988 s390_pci_msix_free(pbdev); 989 s390_pci_iommu_free(s, bus, devfn); 990 pbdev->pdev = NULL; 991 pbdev->state = ZPCI_FS_RESERVED; 992 out: 993 pbdev->fid = 0; 994 QTAILQ_REMOVE(&s->zpci_devs, pbdev, link); 995 g_hash_table_remove(s->zpci_table, &pbdev->idx); 996 object_unparent(OBJECT(pbdev)); 997 } 998 999 static void s390_pci_enumerate_bridge(PCIBus *bus, PCIDevice *pdev, 1000 void *opaque) 1001 { 1002 S390pciState *s = opaque; 1003 unsigned int primary = s->bus_no; 1004 unsigned int subordinate = 0xff; 1005 PCIBus *sec_bus = NULL; 1006 1007 if ((pci_default_read_config(pdev, PCI_HEADER_TYPE, 1) != 1008 PCI_HEADER_TYPE_BRIDGE)) { 1009 return; 1010 } 1011 1012 (s->bus_no)++; 1013 pci_default_write_config(pdev, PCI_PRIMARY_BUS, primary, 1); 1014 pci_default_write_config(pdev, PCI_SECONDARY_BUS, s->bus_no, 1); 1015 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1); 1016 1017 sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev)); 1018 if (!sec_bus) { 1019 return; 1020 } 1021 1022 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, subordinate, 1); 1023 pci_for_each_device(sec_bus, pci_bus_num(sec_bus), 1024 s390_pci_enumerate_bridge, s); 1025 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, s->bus_no, 1); 1026 } 1027 1028 static void s390_pcihost_reset(DeviceState *dev) 1029 { 1030 S390pciState *s = S390_PCI_HOST_BRIDGE(dev); 1031 PCIBus *bus = s->parent_obj.bus; 1032 1033 s->bus_no = 0; 1034 pci_for_each_device(bus, pci_bus_num(bus), s390_pci_enumerate_bridge, s); 1035 } 1036 1037 static void s390_pcihost_class_init(ObjectClass *klass, void *data) 1038 { 1039 DeviceClass *dc = DEVICE_CLASS(klass); 1040 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); 1041 1042 dc->reset = s390_pcihost_reset; 1043 dc->realize = s390_pcihost_realize; 1044 hc->plug = s390_pcihost_hot_plug; 1045 hc->unplug = s390_pcihost_hot_unplug; 1046 msi_nonbroken = true; 1047 } 1048 1049 static const TypeInfo s390_pcihost_info = { 1050 .name = TYPE_S390_PCI_HOST_BRIDGE, 1051 .parent = TYPE_PCI_HOST_BRIDGE, 1052 .instance_size = sizeof(S390pciState), 1053 .class_init = s390_pcihost_class_init, 1054 .interfaces = (InterfaceInfo[]) { 1055 { TYPE_HOTPLUG_HANDLER }, 1056 { } 1057 } 1058 }; 1059 1060 static const TypeInfo s390_pcibus_info = { 1061 .name = TYPE_S390_PCI_BUS, 1062 .parent = TYPE_BUS, 1063 .instance_size = sizeof(S390PCIBus), 1064 }; 1065 1066 static uint16_t s390_pci_generate_uid(S390pciState *s) 1067 { 1068 uint16_t uid = 0; 1069 1070 do { 1071 uid++; 1072 if (!s390_pci_find_dev_by_uid(s, uid)) { 1073 return uid; 1074 } 1075 } while (uid < ZPCI_MAX_UID); 1076 1077 return UID_UNDEFINED; 1078 } 1079 1080 static uint32_t s390_pci_generate_fid(S390pciState *s, Error **errp) 1081 { 1082 uint32_t fid = 0; 1083 1084 do { 1085 if (!s390_pci_find_dev_by_fid(s, fid)) { 1086 return fid; 1087 } 1088 } while (fid++ != ZPCI_MAX_FID); 1089 1090 error_setg(errp, "no free fid could be found"); 1091 return 0; 1092 } 1093 1094 static void s390_pci_device_realize(DeviceState *dev, Error **errp) 1095 { 1096 S390PCIBusDevice *zpci = S390_PCI_DEVICE(dev); 1097 S390pciState *s = s390_get_phb(); 1098 1099 if (!zpci->target) { 1100 error_setg(errp, "target must be defined"); 1101 return; 1102 } 1103 1104 if (s390_pci_find_dev_by_target(s, zpci->target)) { 1105 error_setg(errp, "target %s already has an associated zpci device", 1106 zpci->target); 1107 return; 1108 } 1109 1110 if (zpci->uid == UID_UNDEFINED) { 1111 zpci->uid = s390_pci_generate_uid(s); 1112 if (!zpci->uid) { 1113 error_setg(errp, "no free uid could be found"); 1114 return; 1115 } 1116 } else if (s390_pci_find_dev_by_uid(s, zpci->uid)) { 1117 error_setg(errp, "uid %u already in use", zpci->uid); 1118 return; 1119 } 1120 1121 if (!zpci->fid_defined) { 1122 Error *local_error = NULL; 1123 1124 zpci->fid = s390_pci_generate_fid(s, &local_error); 1125 if (local_error) { 1126 error_propagate(errp, local_error); 1127 return; 1128 } 1129 } else if (s390_pci_find_dev_by_fid(s, zpci->fid)) { 1130 error_setg(errp, "fid %u already in use", zpci->fid); 1131 return; 1132 } 1133 1134 zpci->state = ZPCI_FS_RESERVED; 1135 } 1136 1137 static void s390_pci_device_reset(DeviceState *dev) 1138 { 1139 S390PCIBusDevice *pbdev = S390_PCI_DEVICE(dev); 1140 1141 switch (pbdev->state) { 1142 case ZPCI_FS_RESERVED: 1143 return; 1144 case ZPCI_FS_STANDBY: 1145 break; 1146 default: 1147 pbdev->fh &= ~FH_MASK_ENABLE; 1148 pbdev->state = ZPCI_FS_DISABLED; 1149 break; 1150 } 1151 1152 if (pbdev->summary_ind) { 1153 pci_dereg_irqs(pbdev); 1154 } 1155 if (pbdev->iommu->enabled) { 1156 pci_dereg_ioat(pbdev->iommu); 1157 } 1158 1159 pbdev->fmb_addr = 0; 1160 } 1161 1162 static void s390_pci_get_fid(Object *obj, Visitor *v, const char *name, 1163 void *opaque, Error **errp) 1164 { 1165 Property *prop = opaque; 1166 uint32_t *ptr = qdev_get_prop_ptr(DEVICE(obj), prop); 1167 1168 visit_type_uint32(v, name, ptr, errp); 1169 } 1170 1171 static void s390_pci_set_fid(Object *obj, Visitor *v, const char *name, 1172 void *opaque, Error **errp) 1173 { 1174 DeviceState *dev = DEVICE(obj); 1175 S390PCIBusDevice *zpci = S390_PCI_DEVICE(obj); 1176 Property *prop = opaque; 1177 uint32_t *ptr = qdev_get_prop_ptr(dev, prop); 1178 1179 if (dev->realized) { 1180 qdev_prop_set_after_realize(dev, name, errp); 1181 return; 1182 } 1183 1184 visit_type_uint32(v, name, ptr, errp); 1185 zpci->fid_defined = true; 1186 } 1187 1188 static const PropertyInfo s390_pci_fid_propinfo = { 1189 .name = "zpci_fid", 1190 .get = s390_pci_get_fid, 1191 .set = s390_pci_set_fid, 1192 }; 1193 1194 #define DEFINE_PROP_S390_PCI_FID(_n, _s, _f) \ 1195 DEFINE_PROP(_n, _s, _f, s390_pci_fid_propinfo, uint32_t) 1196 1197 static Property s390_pci_device_properties[] = { 1198 DEFINE_PROP_UINT16("uid", S390PCIBusDevice, uid, UID_UNDEFINED), 1199 DEFINE_PROP_S390_PCI_FID("fid", S390PCIBusDevice, fid), 1200 DEFINE_PROP_STRING("target", S390PCIBusDevice, target), 1201 DEFINE_PROP_END_OF_LIST(), 1202 }; 1203 1204 static void s390_pci_device_class_init(ObjectClass *klass, void *data) 1205 { 1206 DeviceClass *dc = DEVICE_CLASS(klass); 1207 1208 dc->desc = "zpci device"; 1209 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 1210 dc->reset = s390_pci_device_reset; 1211 dc->bus_type = TYPE_S390_PCI_BUS; 1212 dc->realize = s390_pci_device_realize; 1213 dc->props = s390_pci_device_properties; 1214 } 1215 1216 static const TypeInfo s390_pci_device_info = { 1217 .name = TYPE_S390_PCI_DEVICE, 1218 .parent = TYPE_DEVICE, 1219 .instance_size = sizeof(S390PCIBusDevice), 1220 .class_init = s390_pci_device_class_init, 1221 }; 1222 1223 static TypeInfo s390_pci_iommu_info = { 1224 .name = TYPE_S390_PCI_IOMMU, 1225 .parent = TYPE_OBJECT, 1226 .instance_size = sizeof(S390PCIIOMMU), 1227 }; 1228 1229 static void s390_iommu_memory_region_class_init(ObjectClass *klass, void *data) 1230 { 1231 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass); 1232 1233 imrc->translate = s390_translate_iommu; 1234 imrc->replay = s390_pci_iommu_replay; 1235 } 1236 1237 static const TypeInfo s390_iommu_memory_region_info = { 1238 .parent = TYPE_IOMMU_MEMORY_REGION, 1239 .name = TYPE_S390_IOMMU_MEMORY_REGION, 1240 .class_init = s390_iommu_memory_region_class_init, 1241 }; 1242 1243 static void s390_pci_register_types(void) 1244 { 1245 type_register_static(&s390_pcihost_info); 1246 type_register_static(&s390_pcibus_info); 1247 type_register_static(&s390_pci_device_info); 1248 type_register_static(&s390_pci_iommu_info); 1249 type_register_static(&s390_iommu_memory_region_info); 1250 } 1251 1252 type_init(s390_pci_register_types) 1253