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 "s390-pci-bus.h" 15 #include <hw/pci/pci_bus.h> 16 #include <hw/pci/msi.h> 17 #include <qemu/error-report.h> 18 19 /* #define DEBUG_S390PCI_BUS */ 20 #ifdef DEBUG_S390PCI_BUS 21 #define DPRINTF(fmt, ...) \ 22 do { fprintf(stderr, "S390pci-bus: " fmt, ## __VA_ARGS__); } while (0) 23 #else 24 #define DPRINTF(fmt, ...) \ 25 do { } while (0) 26 #endif 27 28 int chsc_sei_nt2_get_event(void *res) 29 { 30 ChscSeiNt2Res *nt2_res = (ChscSeiNt2Res *)res; 31 PciCcdfAvail *accdf; 32 PciCcdfErr *eccdf; 33 int rc = 1; 34 SeiContainer *sei_cont; 35 S390pciState *s = S390_PCI_HOST_BRIDGE( 36 object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL)); 37 38 if (!s) { 39 return rc; 40 } 41 42 sei_cont = QTAILQ_FIRST(&s->pending_sei); 43 if (sei_cont) { 44 QTAILQ_REMOVE(&s->pending_sei, sei_cont, link); 45 nt2_res->nt = 2; 46 nt2_res->cc = sei_cont->cc; 47 switch (sei_cont->cc) { 48 case 1: /* error event */ 49 eccdf = (PciCcdfErr *)nt2_res->ccdf; 50 eccdf->fid = cpu_to_be32(sei_cont->fid); 51 eccdf->fh = cpu_to_be32(sei_cont->fh); 52 eccdf->e = cpu_to_be32(sei_cont->e); 53 eccdf->faddr = cpu_to_be64(sei_cont->faddr); 54 eccdf->pec = cpu_to_be16(sei_cont->pec); 55 break; 56 case 2: /* availability event */ 57 accdf = (PciCcdfAvail *)nt2_res->ccdf; 58 accdf->fid = cpu_to_be32(sei_cont->fid); 59 accdf->fh = cpu_to_be32(sei_cont->fh); 60 accdf->pec = cpu_to_be16(sei_cont->pec); 61 break; 62 default: 63 abort(); 64 } 65 g_free(sei_cont); 66 rc = 0; 67 } 68 69 return rc; 70 } 71 72 int chsc_sei_nt2_have_event(void) 73 { 74 S390pciState *s = S390_PCI_HOST_BRIDGE( 75 object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL)); 76 77 if (!s) { 78 return 0; 79 } 80 81 return !QTAILQ_EMPTY(&s->pending_sei); 82 } 83 84 S390PCIBusDevice *s390_pci_find_dev_by_fid(uint32_t fid) 85 { 86 S390PCIBusDevice *pbdev; 87 int i; 88 S390pciState *s = S390_PCI_HOST_BRIDGE( 89 object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL)); 90 91 if (!s) { 92 return NULL; 93 } 94 95 for (i = 0; i < PCI_SLOT_MAX; i++) { 96 pbdev = &s->pbdev[i]; 97 if ((pbdev->fh != 0) && (pbdev->fid == fid)) { 98 return pbdev; 99 } 100 } 101 102 return NULL; 103 } 104 105 void s390_pci_sclp_configure(int configure, SCCB *sccb) 106 { 107 PciCfgSccb *psccb = (PciCfgSccb *)sccb; 108 S390PCIBusDevice *pbdev = s390_pci_find_dev_by_fid(be32_to_cpu(psccb->aid)); 109 uint16_t rc; 110 111 if (pbdev) { 112 if ((configure == 1 && pbdev->configured == true) || 113 (configure == 0 && pbdev->configured == false)) { 114 rc = SCLP_RC_NO_ACTION_REQUIRED; 115 } else { 116 pbdev->configured = !pbdev->configured; 117 rc = SCLP_RC_NORMAL_COMPLETION; 118 } 119 } else { 120 DPRINTF("sclp config %d no dev found\n", configure); 121 rc = SCLP_RC_ADAPTER_ID_NOT_RECOGNIZED; 122 } 123 124 psccb->header.response_code = cpu_to_be16(rc); 125 return; 126 } 127 128 static uint32_t s390_pci_get_pfid(PCIDevice *pdev) 129 { 130 return PCI_SLOT(pdev->devfn); 131 } 132 133 static uint32_t s390_pci_get_pfh(PCIDevice *pdev) 134 { 135 return PCI_SLOT(pdev->devfn) | FH_VIRT; 136 } 137 138 S390PCIBusDevice *s390_pci_find_dev_by_idx(uint32_t idx) 139 { 140 S390PCIBusDevice *pbdev; 141 int i; 142 int j = 0; 143 S390pciState *s = S390_PCI_HOST_BRIDGE( 144 object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL)); 145 146 if (!s) { 147 return NULL; 148 } 149 150 for (i = 0; i < PCI_SLOT_MAX; i++) { 151 pbdev = &s->pbdev[i]; 152 153 if (pbdev->fh == 0) { 154 continue; 155 } 156 157 if (j == idx) { 158 return pbdev; 159 } 160 j++; 161 } 162 163 return NULL; 164 } 165 166 S390PCIBusDevice *s390_pci_find_dev_by_fh(uint32_t fh) 167 { 168 S390PCIBusDevice *pbdev; 169 int i; 170 S390pciState *s = S390_PCI_HOST_BRIDGE( 171 object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL)); 172 173 if (!s) { 174 return NULL; 175 } 176 177 for (i = 0; i < PCI_SLOT_MAX; i++) { 178 pbdev = &s->pbdev[i]; 179 if (pbdev->fh == fh) { 180 return pbdev; 181 } 182 } 183 184 return NULL; 185 } 186 187 static void s390_pci_generate_event(uint8_t cc, uint16_t pec, uint32_t fh, 188 uint32_t fid, uint64_t faddr, uint32_t e) 189 { 190 SeiContainer *sei_cont = g_malloc0(sizeof(SeiContainer)); 191 S390pciState *s = S390_PCI_HOST_BRIDGE( 192 object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL)); 193 194 if (!s) { 195 return; 196 } 197 198 sei_cont->fh = fh; 199 sei_cont->fid = fid; 200 sei_cont->cc = cc; 201 sei_cont->pec = pec; 202 sei_cont->faddr = faddr; 203 sei_cont->e = e; 204 205 QTAILQ_INSERT_TAIL(&s->pending_sei, sei_cont, link); 206 css_generate_css_crws(0); 207 } 208 209 static void s390_pci_generate_plug_event(uint16_t pec, uint32_t fh, 210 uint32_t fid) 211 { 212 s390_pci_generate_event(2, pec, fh, fid, 0, 0); 213 } 214 215 static void s390_pci_generate_error_event(uint16_t pec, uint32_t fh, 216 uint32_t fid, uint64_t faddr, 217 uint32_t e) 218 { 219 s390_pci_generate_event(1, pec, fh, fid, faddr, e); 220 } 221 222 static void s390_pci_set_irq(void *opaque, int irq, int level) 223 { 224 /* nothing to do */ 225 } 226 227 static int s390_pci_map_irq(PCIDevice *pci_dev, int irq_num) 228 { 229 /* nothing to do */ 230 return 0; 231 } 232 233 static uint64_t s390_pci_get_table_origin(uint64_t iota) 234 { 235 return iota & ~ZPCI_IOTA_RTTO_FLAG; 236 } 237 238 static unsigned int calc_rtx(dma_addr_t ptr) 239 { 240 return ((unsigned long) ptr >> ZPCI_RT_SHIFT) & ZPCI_INDEX_MASK; 241 } 242 243 static unsigned int calc_sx(dma_addr_t ptr) 244 { 245 return ((unsigned long) ptr >> ZPCI_ST_SHIFT) & ZPCI_INDEX_MASK; 246 } 247 248 static unsigned int calc_px(dma_addr_t ptr) 249 { 250 return ((unsigned long) ptr >> PAGE_SHIFT) & ZPCI_PT_MASK; 251 } 252 253 static uint64_t get_rt_sto(uint64_t entry) 254 { 255 return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_RTX) 256 ? (entry & ZPCI_RTE_ADDR_MASK) 257 : 0; 258 } 259 260 static uint64_t get_st_pto(uint64_t entry) 261 { 262 return ((entry & ZPCI_TABLE_TYPE_MASK) == ZPCI_TABLE_TYPE_SX) 263 ? (entry & ZPCI_STE_ADDR_MASK) 264 : 0; 265 } 266 267 static uint64_t s390_guest_io_table_walk(uint64_t guest_iota, 268 uint64_t guest_dma_address) 269 { 270 uint64_t sto_a, pto_a, px_a; 271 uint64_t sto, pto, pte; 272 uint32_t rtx, sx, px; 273 274 rtx = calc_rtx(guest_dma_address); 275 sx = calc_sx(guest_dma_address); 276 px = calc_px(guest_dma_address); 277 278 sto_a = guest_iota + rtx * sizeof(uint64_t); 279 sto = ldq_phys(&address_space_memory, sto_a); 280 sto = get_rt_sto(sto); 281 if (!sto) { 282 pte = 0; 283 goto out; 284 } 285 286 pto_a = sto + sx * sizeof(uint64_t); 287 pto = ldq_phys(&address_space_memory, pto_a); 288 pto = get_st_pto(pto); 289 if (!pto) { 290 pte = 0; 291 goto out; 292 } 293 294 px_a = pto + px * sizeof(uint64_t); 295 pte = ldq_phys(&address_space_memory, px_a); 296 297 out: 298 return pte; 299 } 300 301 static IOMMUTLBEntry s390_translate_iommu(MemoryRegion *iommu, hwaddr addr, 302 bool is_write) 303 { 304 uint64_t pte; 305 uint32_t flags; 306 S390PCIBusDevice *pbdev = container_of(iommu, S390PCIBusDevice, mr); 307 S390pciState *s = S390_PCI_HOST_BRIDGE(pci_device_root_bus(pbdev->pdev) 308 ->qbus.parent); 309 IOMMUTLBEntry ret = { 310 .target_as = &address_space_memory, 311 .iova = 0, 312 .translated_addr = 0, 313 .addr_mask = ~(hwaddr)0, 314 .perm = IOMMU_NONE, 315 }; 316 317 DPRINTF("iommu trans addr 0x%" PRIx64 "\n", addr); 318 319 /* s390 does not have an APIC mapped to main storage so we use 320 * a separate AddressSpace only for msix notifications 321 */ 322 if (addr == ZPCI_MSI_ADDR) { 323 ret.target_as = &s->msix_notify_as; 324 ret.iova = addr; 325 ret.translated_addr = addr; 326 ret.addr_mask = 0xfff; 327 ret.perm = IOMMU_RW; 328 return ret; 329 } 330 331 if (!pbdev->g_iota) { 332 pbdev->error_state = true; 333 pbdev->lgstg_blocked = true; 334 s390_pci_generate_error_event(ERR_EVENT_INVALAS, pbdev->fh, pbdev->fid, 335 addr, 0); 336 return ret; 337 } 338 339 if (addr < pbdev->pba || addr > pbdev->pal) { 340 pbdev->error_state = true; 341 pbdev->lgstg_blocked = true; 342 s390_pci_generate_error_event(ERR_EVENT_OORANGE, pbdev->fh, pbdev->fid, 343 addr, 0); 344 return ret; 345 } 346 347 pte = s390_guest_io_table_walk(s390_pci_get_table_origin(pbdev->g_iota), 348 addr); 349 350 if (!pte) { 351 pbdev->error_state = true; 352 pbdev->lgstg_blocked = true; 353 s390_pci_generate_error_event(ERR_EVENT_SERR, pbdev->fh, pbdev->fid, 354 addr, ERR_EVENT_Q_BIT); 355 return ret; 356 } 357 358 flags = pte & ZPCI_PTE_FLAG_MASK; 359 ret.iova = addr; 360 ret.translated_addr = pte & ZPCI_PTE_ADDR_MASK; 361 ret.addr_mask = 0xfff; 362 363 if (flags & ZPCI_PTE_INVALID) { 364 ret.perm = IOMMU_NONE; 365 } else { 366 ret.perm = IOMMU_RW; 367 } 368 369 return ret; 370 } 371 372 static const MemoryRegionIOMMUOps s390_iommu_ops = { 373 .translate = s390_translate_iommu, 374 }; 375 376 static AddressSpace *s390_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn) 377 { 378 S390pciState *s = opaque; 379 380 return &s->pbdev[PCI_SLOT(devfn)].as; 381 } 382 383 static uint8_t set_ind_atomic(uint64_t ind_loc, uint8_t to_be_set) 384 { 385 uint8_t ind_old, ind_new; 386 hwaddr len = 1; 387 uint8_t *ind_addr; 388 389 ind_addr = cpu_physical_memory_map(ind_loc, &len, 1); 390 if (!ind_addr) { 391 s390_pci_generate_error_event(ERR_EVENT_AIRERR, 0, 0, 0, 0); 392 return -1; 393 } 394 do { 395 ind_old = *ind_addr; 396 ind_new = ind_old | to_be_set; 397 } while (atomic_cmpxchg(ind_addr, ind_old, ind_new) != ind_old); 398 cpu_physical_memory_unmap(ind_addr, len, 1, len); 399 400 return ind_old; 401 } 402 403 static void s390_msi_ctrl_write(void *opaque, hwaddr addr, uint64_t data, 404 unsigned int size) 405 { 406 S390PCIBusDevice *pbdev; 407 uint32_t io_int_word; 408 uint32_t fid = data >> ZPCI_MSI_VEC_BITS; 409 uint32_t vec = data & ZPCI_MSI_VEC_MASK; 410 uint64_t ind_bit; 411 uint32_t sum_bit; 412 uint32_t e = 0; 413 414 DPRINTF("write_msix data 0x%" PRIx64 " fid %d vec 0x%x\n", data, fid, vec); 415 416 pbdev = s390_pci_find_dev_by_fid(fid); 417 if (!pbdev) { 418 e |= (vec << ERR_EVENT_MVN_OFFSET); 419 s390_pci_generate_error_event(ERR_EVENT_NOMSI, 0, fid, addr, e); 420 return; 421 } 422 423 ind_bit = pbdev->routes.adapter.ind_offset; 424 sum_bit = pbdev->routes.adapter.summary_offset; 425 426 set_ind_atomic(pbdev->routes.adapter.ind_addr + (ind_bit + vec) / 8, 427 0x80 >> ((ind_bit + vec) % 8)); 428 if (!set_ind_atomic(pbdev->routes.adapter.summary_addr + sum_bit / 8, 429 0x80 >> (sum_bit % 8))) { 430 io_int_word = (pbdev->isc << 27) | IO_INT_WORD_AI; 431 s390_io_interrupt(0, 0, 0, io_int_word); 432 } 433 434 return; 435 } 436 437 static uint64_t s390_msi_ctrl_read(void *opaque, hwaddr addr, unsigned size) 438 { 439 return 0xffffffff; 440 } 441 442 static const MemoryRegionOps s390_msi_ctrl_ops = { 443 .write = s390_msi_ctrl_write, 444 .read = s390_msi_ctrl_read, 445 .endianness = DEVICE_LITTLE_ENDIAN, 446 }; 447 448 static void s390_pcihost_init_as(S390pciState *s) 449 { 450 int i; 451 452 for (i = 0; i < PCI_SLOT_MAX; i++) { 453 memory_region_init_iommu(&s->pbdev[i].mr, OBJECT(s), 454 &s390_iommu_ops, "iommu-s390", UINT64_MAX); 455 address_space_init(&s->pbdev[i].as, &s->pbdev[i].mr, "iommu-pci"); 456 } 457 458 memory_region_init_io(&s->msix_notify_mr, OBJECT(s), 459 &s390_msi_ctrl_ops, s, "msix-s390", UINT64_MAX); 460 address_space_init(&s->msix_notify_as, &s->msix_notify_mr, "msix-pci"); 461 } 462 463 static int s390_pcihost_init(SysBusDevice *dev) 464 { 465 PCIBus *b; 466 BusState *bus; 467 PCIHostState *phb = PCI_HOST_BRIDGE(dev); 468 S390pciState *s = S390_PCI_HOST_BRIDGE(dev); 469 470 DPRINTF("host_init\n"); 471 472 b = pci_register_bus(DEVICE(dev), NULL, 473 s390_pci_set_irq, s390_pci_map_irq, NULL, 474 get_system_memory(), get_system_io(), 0, 64, 475 TYPE_PCI_BUS); 476 s390_pcihost_init_as(s); 477 pci_setup_iommu(b, s390_pci_dma_iommu, s); 478 479 bus = BUS(b); 480 qbus_set_hotplug_handler(bus, DEVICE(dev), NULL); 481 phb->bus = b; 482 QTAILQ_INIT(&s->pending_sei); 483 return 0; 484 } 485 486 static int s390_pcihost_setup_msix(S390PCIBusDevice *pbdev) 487 { 488 uint8_t pos; 489 uint16_t ctrl; 490 uint32_t table, pba; 491 492 pos = pci_find_capability(pbdev->pdev, PCI_CAP_ID_MSIX); 493 if (!pos) { 494 pbdev->msix.available = false; 495 return 0; 496 } 497 498 ctrl = pci_host_config_read_common(pbdev->pdev, pos + PCI_CAP_FLAGS, 499 pci_config_size(pbdev->pdev), sizeof(ctrl)); 500 table = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_TABLE, 501 pci_config_size(pbdev->pdev), sizeof(table)); 502 pba = pci_host_config_read_common(pbdev->pdev, pos + PCI_MSIX_PBA, 503 pci_config_size(pbdev->pdev), sizeof(pba)); 504 505 pbdev->msix.table_bar = table & PCI_MSIX_FLAGS_BIRMASK; 506 pbdev->msix.table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK; 507 pbdev->msix.pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK; 508 pbdev->msix.pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK; 509 pbdev->msix.entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1; 510 pbdev->msix.available = true; 511 return 0; 512 } 513 514 static void s390_pcihost_hot_plug(HotplugHandler *hotplug_dev, 515 DeviceState *dev, Error **errp) 516 { 517 PCIDevice *pci_dev = PCI_DEVICE(dev); 518 S390PCIBusDevice *pbdev; 519 S390pciState *s = S390_PCI_HOST_BRIDGE(pci_device_root_bus(pci_dev) 520 ->qbus.parent); 521 522 pbdev = &s->pbdev[PCI_SLOT(pci_dev->devfn)]; 523 524 pbdev->fid = s390_pci_get_pfid(pci_dev); 525 pbdev->pdev = pci_dev; 526 pbdev->configured = true; 527 pbdev->fh = s390_pci_get_pfh(pci_dev); 528 529 s390_pcihost_setup_msix(pbdev); 530 531 if (dev->hotplugged) { 532 s390_pci_generate_plug_event(HP_EVENT_RESERVED_TO_STANDBY, 533 pbdev->fh, pbdev->fid); 534 s390_pci_generate_plug_event(HP_EVENT_TO_CONFIGURED, 535 pbdev->fh, pbdev->fid); 536 } 537 return; 538 } 539 540 static void s390_pcihost_hot_unplug(HotplugHandler *hotplug_dev, 541 DeviceState *dev, Error **errp) 542 { 543 PCIDevice *pci_dev = PCI_DEVICE(dev); 544 S390pciState *s = S390_PCI_HOST_BRIDGE(pci_device_root_bus(pci_dev) 545 ->qbus.parent); 546 S390PCIBusDevice *pbdev = &s->pbdev[PCI_SLOT(pci_dev->devfn)]; 547 548 if (pbdev->configured) { 549 pbdev->configured = false; 550 s390_pci_generate_plug_event(HP_EVENT_CONFIGURED_TO_STBRES, 551 pbdev->fh, pbdev->fid); 552 } 553 554 s390_pci_generate_plug_event(HP_EVENT_STANDBY_TO_RESERVED, 555 pbdev->fh, pbdev->fid); 556 pbdev->fh = 0; 557 pbdev->fid = 0; 558 pbdev->pdev = NULL; 559 object_unparent(OBJECT(pci_dev)); 560 } 561 562 static void s390_pcihost_class_init(ObjectClass *klass, void *data) 563 { 564 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); 565 DeviceClass *dc = DEVICE_CLASS(klass); 566 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass); 567 568 dc->cannot_instantiate_with_device_add_yet = true; 569 k->init = s390_pcihost_init; 570 hc->plug = s390_pcihost_hot_plug; 571 hc->unplug = s390_pcihost_hot_unplug; 572 msi_supported = true; 573 } 574 575 static const TypeInfo s390_pcihost_info = { 576 .name = TYPE_S390_PCI_HOST_BRIDGE, 577 .parent = TYPE_PCI_HOST_BRIDGE, 578 .instance_size = sizeof(S390pciState), 579 .class_init = s390_pcihost_class_init, 580 .interfaces = (InterfaceInfo[]) { 581 { TYPE_HOTPLUG_HANDLER }, 582 { } 583 } 584 }; 585 586 static void s390_pci_register_types(void) 587 { 588 type_register_static(&s390_pcihost_info); 589 } 590 591 type_init(s390_pci_register_types) 592