1 /*- 2 * Copyright (c) 2013 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Konstantin Belousov <kib@FreeBSD.org> 6 * under sponsorship from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_acpi.h" 34 #if defined(__amd64__) 35 #define DEV_APIC 36 #else 37 #include "opt_apic.h" 38 #endif 39 #include "opt_ddb.h" 40 41 #include <sys/param.h> 42 #include <sys/bus.h> 43 #include <sys/kernel.h> 44 #include <sys/lock.h> 45 #include <sys/malloc.h> 46 #include <sys/memdesc.h> 47 #include <sys/module.h> 48 #include <sys/rman.h> 49 #include <sys/rwlock.h> 50 #include <sys/smp.h> 51 #include <sys/taskqueue.h> 52 #include <sys/tree.h> 53 #include <machine/bus.h> 54 #include <contrib/dev/acpica/include/acpi.h> 55 #include <contrib/dev/acpica/include/accommon.h> 56 #include <dev/acpica/acpivar.h> 57 #include <vm/vm.h> 58 #include <vm/vm_extern.h> 59 #include <vm/vm_kern.h> 60 #include <vm/vm_object.h> 61 #include <vm/vm_page.h> 62 #include <vm/vm_pager.h> 63 #include <vm/vm_map.h> 64 #include <x86/include/busdma_impl.h> 65 #include <x86/iommu/intel_reg.h> 66 #include <x86/iommu/busdma_dmar.h> 67 #include <x86/iommu/intel_dmar.h> 68 #include <dev/pci/pcivar.h> 69 70 #ifdef DEV_APIC 71 #include "pcib_if.h" 72 #endif 73 74 #define DMAR_FAULT_IRQ_RID 0 75 #define DMAR_QI_IRQ_RID 1 76 #define DMAR_REG_RID 2 77 78 static devclass_t dmar_devclass; 79 static device_t *dmar_devs; 80 static int dmar_devcnt; 81 82 typedef int (*dmar_iter_t)(ACPI_DMAR_HEADER *, void *); 83 84 static void 85 dmar_iterate_tbl(dmar_iter_t iter, void *arg) 86 { 87 ACPI_TABLE_DMAR *dmartbl; 88 ACPI_DMAR_HEADER *dmarh; 89 char *ptr, *ptrend; 90 ACPI_STATUS status; 91 92 status = AcpiGetTable(ACPI_SIG_DMAR, 1, (ACPI_TABLE_HEADER **)&dmartbl); 93 if (ACPI_FAILURE(status)) 94 return; 95 ptr = (char *)dmartbl + sizeof(*dmartbl); 96 ptrend = (char *)dmartbl + dmartbl->Header.Length; 97 for (;;) { 98 if (ptr >= ptrend) 99 break; 100 dmarh = (ACPI_DMAR_HEADER *)ptr; 101 if (dmarh->Length <= 0) { 102 printf("dmar_identify: corrupted DMAR table, l %d\n", 103 dmarh->Length); 104 break; 105 } 106 ptr += dmarh->Length; 107 if (!iter(dmarh, arg)) 108 break; 109 } 110 } 111 112 struct find_iter_args { 113 int i; 114 ACPI_DMAR_HARDWARE_UNIT *res; 115 }; 116 117 static int 118 dmar_find_iter(ACPI_DMAR_HEADER *dmarh, void *arg) 119 { 120 struct find_iter_args *fia; 121 122 if (dmarh->Type != ACPI_DMAR_TYPE_HARDWARE_UNIT) 123 return (1); 124 125 fia = arg; 126 if (fia->i == 0) { 127 fia->res = (ACPI_DMAR_HARDWARE_UNIT *)dmarh; 128 return (0); 129 } 130 fia->i--; 131 return (1); 132 } 133 134 static ACPI_DMAR_HARDWARE_UNIT * 135 dmar_find_by_index(int idx) 136 { 137 struct find_iter_args fia; 138 139 fia.i = idx; 140 fia.res = NULL; 141 dmar_iterate_tbl(dmar_find_iter, &fia); 142 return (fia.res); 143 } 144 145 static int 146 dmar_count_iter(ACPI_DMAR_HEADER *dmarh, void *arg) 147 { 148 149 if (dmarh->Type == ACPI_DMAR_TYPE_HARDWARE_UNIT) 150 dmar_devcnt++; 151 return (1); 152 } 153 154 static int dmar_enable = 0; 155 static void 156 dmar_identify(driver_t *driver, device_t parent) 157 { 158 ACPI_TABLE_DMAR *dmartbl; 159 ACPI_DMAR_HARDWARE_UNIT *dmarh; 160 ACPI_STATUS status; 161 int i, error; 162 163 if (acpi_disabled("dmar")) 164 return; 165 TUNABLE_INT_FETCH("hw.dmar.enable", &dmar_enable); 166 if (!dmar_enable) 167 return; 168 #ifdef INVARIANTS 169 TUNABLE_INT_FETCH("hw.dmar.check_free", &dmar_check_free); 170 #endif 171 TUNABLE_INT_FETCH("hw.dmar.match_verbose", &dmar_match_verbose); 172 status = AcpiGetTable(ACPI_SIG_DMAR, 1, (ACPI_TABLE_HEADER **)&dmartbl); 173 if (ACPI_FAILURE(status)) 174 return; 175 haw = dmartbl->Width + 1; 176 if ((1ULL << (haw + 1)) > BUS_SPACE_MAXADDR) 177 dmar_high = BUS_SPACE_MAXADDR; 178 else 179 dmar_high = 1ULL << (haw + 1); 180 if (bootverbose) { 181 printf("DMAR HAW=%d flags=<%b>\n", dmartbl->Width, 182 (unsigned)dmartbl->Flags, 183 "\020\001INTR_REMAP\002X2APIC_OPT_OUT"); 184 } 185 186 dmar_iterate_tbl(dmar_count_iter, NULL); 187 if (dmar_devcnt == 0) 188 return; 189 dmar_devs = malloc(sizeof(device_t) * dmar_devcnt, M_DEVBUF, 190 M_WAITOK | M_ZERO); 191 for (i = 0; i < dmar_devcnt; i++) { 192 dmarh = dmar_find_by_index(i); 193 if (dmarh == NULL) { 194 printf("dmar_identify: cannot find HWUNIT %d\n", i); 195 continue; 196 } 197 dmar_devs[i] = BUS_ADD_CHILD(parent, 1, "dmar", i); 198 if (dmar_devs[i] == NULL) { 199 printf("dmar_identify: cannot create instance %d\n", i); 200 continue; 201 } 202 error = bus_set_resource(dmar_devs[i], SYS_RES_MEMORY, 203 DMAR_REG_RID, dmarh->Address, PAGE_SIZE); 204 if (error != 0) { 205 printf( 206 "dmar%d: unable to alloc register window at 0x%08jx: error %d\n", 207 i, (uintmax_t)dmarh->Address, error); 208 device_delete_child(parent, dmar_devs[i]); 209 dmar_devs[i] = NULL; 210 } 211 } 212 } 213 214 static int 215 dmar_probe(device_t dev) 216 { 217 218 if (acpi_get_handle(dev) != NULL) 219 return (ENXIO); 220 device_set_desc(dev, "DMA remap"); 221 return (BUS_PROBE_NOWILDCARD); 222 } 223 224 static void 225 dmar_release_intr(device_t dev, struct dmar_unit *unit, int idx) 226 { 227 struct dmar_msi_data *dmd; 228 229 dmd = &unit->intrs[idx]; 230 if (dmd->irq == -1) 231 return; 232 bus_teardown_intr(dev, dmd->irq_res, dmd->intr_handle); 233 bus_release_resource(dev, SYS_RES_IRQ, dmd->irq_rid, dmd->irq_res); 234 bus_delete_resource(dev, SYS_RES_IRQ, dmd->irq_rid); 235 PCIB_RELEASE_MSIX(device_get_parent(device_get_parent(dev)), 236 dev, dmd->irq); 237 dmd->irq = -1; 238 } 239 240 static void 241 dmar_release_resources(device_t dev, struct dmar_unit *unit) 242 { 243 int i; 244 245 dmar_fini_busdma(unit); 246 dmar_fini_qi(unit); 247 dmar_fini_fault_log(unit); 248 for (i = 0; i < DMAR_INTR_TOTAL; i++) 249 dmar_release_intr(dev, unit, i); 250 if (unit->regs != NULL) { 251 bus_deactivate_resource(dev, SYS_RES_MEMORY, unit->reg_rid, 252 unit->regs); 253 bus_release_resource(dev, SYS_RES_MEMORY, unit->reg_rid, 254 unit->regs); 255 unit->regs = NULL; 256 } 257 if (unit->domids != NULL) { 258 delete_unrhdr(unit->domids); 259 unit->domids = NULL; 260 } 261 if (unit->ctx_obj != NULL) { 262 vm_object_deallocate(unit->ctx_obj); 263 unit->ctx_obj = NULL; 264 } 265 } 266 267 static int 268 dmar_alloc_irq(device_t dev, struct dmar_unit *unit, int idx) 269 { 270 device_t pcib; 271 struct dmar_msi_data *dmd; 272 uint64_t msi_addr; 273 uint32_t msi_data; 274 int error; 275 276 dmd = &unit->intrs[idx]; 277 pcib = device_get_parent(device_get_parent(dev)); /* Really not pcib */ 278 error = PCIB_ALLOC_MSIX(pcib, dev, &dmd->irq); 279 if (error != 0) { 280 device_printf(dev, "cannot allocate %s interrupt, %d\n", 281 dmd->name, error); 282 goto err1; 283 } 284 error = bus_set_resource(dev, SYS_RES_IRQ, dmd->irq_rid, 285 dmd->irq, 1); 286 if (error != 0) { 287 device_printf(dev, "cannot set %s interrupt resource, %d\n", 288 dmd->name, error); 289 goto err2; 290 } 291 dmd->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, 292 &dmd->irq_rid, RF_ACTIVE); 293 if (dmd->irq_res == NULL) { 294 device_printf(dev, 295 "cannot allocate resource for %s interrupt\n", dmd->name); 296 error = ENXIO; 297 goto err3; 298 } 299 error = bus_setup_intr(dev, dmd->irq_res, INTR_TYPE_MISC, 300 dmd->handler, NULL, unit, &dmd->intr_handle); 301 if (error != 0) { 302 device_printf(dev, "cannot setup %s interrupt, %d\n", 303 dmd->name, error); 304 goto err4; 305 } 306 bus_describe_intr(dev, dmd->irq_res, dmd->intr_handle, dmd->name); 307 error = PCIB_MAP_MSI(pcib, dev, dmd->irq, &msi_addr, &msi_data); 308 if (error != 0) { 309 device_printf(dev, "cannot map %s interrupt, %d\n", 310 dmd->name, error); 311 goto err5; 312 } 313 dmar_write4(unit, dmd->msi_data_reg, msi_data); 314 dmar_write4(unit, dmd->msi_addr_reg, msi_addr); 315 /* Only for xAPIC mode */ 316 dmar_write4(unit, dmd->msi_uaddr_reg, msi_addr >> 32); 317 return (0); 318 319 err5: 320 bus_teardown_intr(dev, dmd->irq_res, dmd->intr_handle); 321 err4: 322 bus_release_resource(dev, SYS_RES_IRQ, dmd->irq_rid, dmd->irq_res); 323 err3: 324 bus_delete_resource(dev, SYS_RES_IRQ, dmd->irq_rid); 325 err2: 326 PCIB_RELEASE_MSIX(pcib, dev, dmd->irq); 327 dmd->irq = -1; 328 err1: 329 return (error); 330 } 331 332 #ifdef DEV_APIC 333 static int 334 dmar_remap_intr(device_t dev, device_t child, u_int irq) 335 { 336 struct dmar_unit *unit; 337 struct dmar_msi_data *dmd; 338 uint64_t msi_addr; 339 uint32_t msi_data; 340 int i, error; 341 342 unit = device_get_softc(dev); 343 for (i = 0; i < DMAR_INTR_TOTAL; i++) { 344 dmd = &unit->intrs[i]; 345 if (irq == dmd->irq) { 346 error = PCIB_MAP_MSI(device_get_parent( 347 device_get_parent(dev)), 348 dev, irq, &msi_addr, &msi_data); 349 if (error != 0) 350 return (error); 351 DMAR_LOCK(unit); 352 (dmd->disable_intr)(unit); 353 dmar_write4(unit, dmd->msi_data_reg, msi_data); 354 dmar_write4(unit, dmd->msi_addr_reg, msi_addr); 355 dmar_write4(unit, dmd->msi_uaddr_reg, msi_addr >> 32); 356 (dmd->enable_intr)(unit); 357 DMAR_UNLOCK(unit); 358 return (0); 359 } 360 } 361 return (ENOENT); 362 } 363 #endif 364 365 static void 366 dmar_print_caps(device_t dev, struct dmar_unit *unit, 367 ACPI_DMAR_HARDWARE_UNIT *dmaru) 368 { 369 uint32_t caphi, ecaphi; 370 371 device_printf(dev, "regs@0x%08jx, ver=%d.%d, seg=%d, flags=<%b>\n", 372 (uintmax_t)dmaru->Address, DMAR_MAJOR_VER(unit->hw_ver), 373 DMAR_MINOR_VER(unit->hw_ver), dmaru->Segment, 374 dmaru->Flags, "\020\001INCLUDE_ALL_PCI"); 375 caphi = unit->hw_cap >> 32; 376 device_printf(dev, "cap=%b,", (u_int)unit->hw_cap, 377 "\020\004AFL\005WBF\006PLMR\007PHMR\010CM\027ZLR\030ISOCH"); 378 printf("%b, ", caphi, "\020\010PSI\027DWD\030DRD\031FL1GP\034PSI"); 379 printf("ndoms=%d, sagaw=%d, mgaw=%d, fro=%d, nfr=%d, superp=%d", 380 DMAR_CAP_ND(unit->hw_cap), DMAR_CAP_SAGAW(unit->hw_cap), 381 DMAR_CAP_MGAW(unit->hw_cap), DMAR_CAP_FRO(unit->hw_cap), 382 DMAR_CAP_NFR(unit->hw_cap), DMAR_CAP_SPS(unit->hw_cap)); 383 if ((unit->hw_cap & DMAR_CAP_PSI) != 0) 384 printf(", mamv=%d", DMAR_CAP_MAMV(unit->hw_cap)); 385 printf("\n"); 386 ecaphi = unit->hw_ecap >> 32; 387 device_printf(dev, "ecap=%b,", (u_int)unit->hw_ecap, 388 "\020\001C\002QI\003DI\004IR\005EIM\007PT\010SC\031ECS\032MTS" 389 "\033NEST\034DIS\035PASID\036PRS\037ERS\040SRS"); 390 printf("%b, ", ecaphi, "\020\002NWFS\003EAFS"); 391 printf("mhmw=%d, iro=%d\n", DMAR_ECAP_MHMV(unit->hw_ecap), 392 DMAR_ECAP_IRO(unit->hw_ecap)); 393 } 394 395 static int 396 dmar_attach(device_t dev) 397 { 398 struct dmar_unit *unit; 399 ACPI_DMAR_HARDWARE_UNIT *dmaru; 400 int i, error; 401 402 unit = device_get_softc(dev); 403 unit->dev = dev; 404 unit->unit = device_get_unit(dev); 405 dmaru = dmar_find_by_index(unit->unit); 406 if (dmaru == NULL) 407 return (EINVAL); 408 unit->segment = dmaru->Segment; 409 unit->base = dmaru->Address; 410 unit->reg_rid = DMAR_REG_RID; 411 unit->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, 412 &unit->reg_rid, RF_ACTIVE); 413 if (unit->regs == NULL) { 414 device_printf(dev, "cannot allocate register window\n"); 415 return (ENOMEM); 416 } 417 unit->hw_ver = dmar_read4(unit, DMAR_VER_REG); 418 unit->hw_cap = dmar_read8(unit, DMAR_CAP_REG); 419 unit->hw_ecap = dmar_read8(unit, DMAR_ECAP_REG); 420 if (bootverbose) 421 dmar_print_caps(dev, unit, dmaru); 422 dmar_quirks_post_ident(unit); 423 424 for (i = 0; i < DMAR_INTR_TOTAL; i++) 425 unit->intrs[i].irq = -1; 426 427 unit->intrs[DMAR_INTR_FAULT].name = "fault"; 428 unit->intrs[DMAR_INTR_FAULT].irq_rid = DMAR_FAULT_IRQ_RID; 429 unit->intrs[DMAR_INTR_FAULT].handler = dmar_fault_intr; 430 unit->intrs[DMAR_INTR_FAULT].msi_data_reg = DMAR_FEDATA_REG; 431 unit->intrs[DMAR_INTR_FAULT].msi_addr_reg = DMAR_FEADDR_REG; 432 unit->intrs[DMAR_INTR_FAULT].msi_uaddr_reg = DMAR_FEUADDR_REG; 433 unit->intrs[DMAR_INTR_FAULT].enable_intr = dmar_enable_fault_intr; 434 unit->intrs[DMAR_INTR_FAULT].disable_intr = dmar_disable_fault_intr; 435 error = dmar_alloc_irq(dev, unit, DMAR_INTR_FAULT); 436 if (error != 0) { 437 dmar_release_resources(dev, unit); 438 return (error); 439 } 440 if (DMAR_HAS_QI(unit)) { 441 unit->intrs[DMAR_INTR_QI].name = "qi"; 442 unit->intrs[DMAR_INTR_QI].irq_rid = DMAR_QI_IRQ_RID; 443 unit->intrs[DMAR_INTR_QI].handler = dmar_qi_intr; 444 unit->intrs[DMAR_INTR_QI].msi_data_reg = DMAR_IEDATA_REG; 445 unit->intrs[DMAR_INTR_QI].msi_addr_reg = DMAR_IEADDR_REG; 446 unit->intrs[DMAR_INTR_QI].msi_uaddr_reg = DMAR_IEUADDR_REG; 447 unit->intrs[DMAR_INTR_QI].enable_intr = dmar_enable_qi_intr; 448 unit->intrs[DMAR_INTR_QI].disable_intr = dmar_disable_qi_intr; 449 error = dmar_alloc_irq(dev, unit, DMAR_INTR_QI); 450 if (error != 0) { 451 dmar_release_resources(dev, unit); 452 return (error); 453 } 454 } 455 456 mtx_init(&unit->lock, "dmarhw", NULL, MTX_DEF); 457 unit->domids = new_unrhdr(0, dmar_nd2mask(DMAR_CAP_ND(unit->hw_cap)), 458 &unit->lock); 459 460 /* 461 * 9.2 "Context Entry": 462 * When Caching Mode (CM) field is reported as Set, the 463 * domain-id value of zero is architecturally reserved. 464 * Software must not use domain-id value of zero 465 * when CM is Set. 466 */ 467 if ((unit->hw_cap & DMAR_CAP_CM) != 0) 468 alloc_unr_specific(unit->domids, 0); 469 470 unit->ctx_obj = vm_pager_allocate(OBJT_PHYS, NULL, IDX_TO_OFF(1 + 471 DMAR_CTX_CNT), 0, 0, NULL); 472 473 /* 474 * Allocate and load the root entry table pointer. Enable the 475 * address translation after the required invalidations are 476 * done. 477 */ 478 dmar_pgalloc(unit->ctx_obj, 0, DMAR_PGF_WAITOK | DMAR_PGF_ZERO); 479 DMAR_LOCK(unit); 480 error = dmar_load_root_entry_ptr(unit); 481 if (error != 0) { 482 DMAR_UNLOCK(unit); 483 dmar_release_resources(dev, unit); 484 return (error); 485 } 486 error = dmar_inv_ctx_glob(unit); 487 if (error != 0) { 488 DMAR_UNLOCK(unit); 489 dmar_release_resources(dev, unit); 490 return (error); 491 } 492 if ((unit->hw_ecap & DMAR_ECAP_DI) != 0) { 493 error = dmar_inv_iotlb_glob(unit); 494 if (error != 0) { 495 DMAR_UNLOCK(unit); 496 dmar_release_resources(dev, unit); 497 return (error); 498 } 499 } 500 501 DMAR_UNLOCK(unit); 502 error = dmar_init_fault_log(unit); 503 if (error != 0) { 504 dmar_release_resources(dev, unit); 505 return (error); 506 } 507 error = dmar_init_qi(unit); 508 if (error != 0) { 509 dmar_release_resources(dev, unit); 510 return (error); 511 } 512 error = dmar_init_busdma(unit); 513 if (error != 0) { 514 dmar_release_resources(dev, unit); 515 return (error); 516 } 517 518 #ifdef NOTYET 519 DMAR_LOCK(unit); 520 error = dmar_enable_translation(unit); 521 if (error != 0) { 522 DMAR_UNLOCK(unit); 523 dmar_release_resources(dev, unit); 524 return (error); 525 } 526 DMAR_UNLOCK(unit); 527 #endif 528 529 return (0); 530 } 531 532 static int 533 dmar_detach(device_t dev) 534 { 535 536 return (EBUSY); 537 } 538 539 static int 540 dmar_suspend(device_t dev) 541 { 542 543 return (0); 544 } 545 546 static int 547 dmar_resume(device_t dev) 548 { 549 550 /* XXXKIB */ 551 return (0); 552 } 553 554 static device_method_t dmar_methods[] = { 555 DEVMETHOD(device_identify, dmar_identify), 556 DEVMETHOD(device_probe, dmar_probe), 557 DEVMETHOD(device_attach, dmar_attach), 558 DEVMETHOD(device_detach, dmar_detach), 559 DEVMETHOD(device_suspend, dmar_suspend), 560 DEVMETHOD(device_resume, dmar_resume), 561 #ifdef DEV_APIC 562 DEVMETHOD(bus_remap_intr, dmar_remap_intr), 563 #endif 564 DEVMETHOD_END 565 }; 566 567 static driver_t dmar_driver = { 568 "dmar", 569 dmar_methods, 570 sizeof(struct dmar_unit), 571 }; 572 573 DRIVER_MODULE(dmar, acpi, dmar_driver, dmar_devclass, 0, 0); 574 MODULE_DEPEND(dmar, acpi, 1, 1, 1); 575 576 static void 577 dmar_print_path(device_t dev, const char *banner, int busno, int depth, 578 const ACPI_DMAR_PCI_PATH *path) 579 { 580 int i; 581 582 device_printf(dev, "%s [%d, ", banner, busno); 583 for (i = 0; i < depth; i++) { 584 if (i != 0) 585 printf(", "); 586 printf("(%d, %d)", path[i].Device, path[i].Function); 587 } 588 printf("]\n"); 589 } 590 591 static int 592 dmar_dev_depth(device_t child) 593 { 594 devclass_t pci_class; 595 device_t bus, pcib; 596 int depth; 597 598 pci_class = devclass_find("pci"); 599 for (depth = 1; ; depth++) { 600 bus = device_get_parent(child); 601 pcib = device_get_parent(bus); 602 if (device_get_devclass(device_get_parent(pcib)) != 603 pci_class) 604 return (depth); 605 child = pcib; 606 } 607 } 608 609 static void 610 dmar_dev_path(device_t child, int *busno, ACPI_DMAR_PCI_PATH *path, int depth) 611 { 612 devclass_t pci_class; 613 device_t bus, pcib; 614 615 pci_class = devclass_find("pci"); 616 for (depth--; depth != -1; depth--) { 617 path[depth].Device = pci_get_slot(child); 618 path[depth].Function = pci_get_function(child); 619 bus = device_get_parent(child); 620 pcib = device_get_parent(bus); 621 if (device_get_devclass(device_get_parent(pcib)) != 622 pci_class) { 623 /* reached a host bridge */ 624 *busno = pcib_get_bus(bus); 625 return; 626 } 627 child = pcib; 628 } 629 panic("wrong depth"); 630 } 631 632 static int 633 dmar_match_pathes(int busno1, const ACPI_DMAR_PCI_PATH *path1, int depth1, 634 int busno2, const ACPI_DMAR_PCI_PATH *path2, int depth2, 635 enum AcpiDmarScopeType scope_type) 636 { 637 int i, depth; 638 639 if (busno1 != busno2) 640 return (0); 641 if (scope_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT && depth1 != depth2) 642 return (0); 643 depth = depth1; 644 if (depth2 < depth) 645 depth = depth2; 646 for (i = 0; i < depth; i++) { 647 if (path1[i].Device != path2[i].Device || 648 path1[i].Function != path2[i].Function) 649 return (0); 650 } 651 return (1); 652 } 653 654 static int 655 dmar_match_devscope(ACPI_DMAR_DEVICE_SCOPE *devscope, device_t dev, 656 int dev_busno, const ACPI_DMAR_PCI_PATH *dev_path, int dev_path_len) 657 { 658 ACPI_DMAR_PCI_PATH *path; 659 int path_len; 660 661 if (devscope->Length < sizeof(*devscope)) { 662 printf("dmar_find: corrupted DMAR table, dl %d\n", 663 devscope->Length); 664 return (-1); 665 } 666 if (devscope->EntryType != ACPI_DMAR_SCOPE_TYPE_ENDPOINT && 667 devscope->EntryType != ACPI_DMAR_SCOPE_TYPE_BRIDGE) 668 return (0); 669 path_len = devscope->Length - sizeof(*devscope); 670 if (path_len % 2 != 0) { 671 printf("dmar_find_bsf: corrupted DMAR table, dl %d\n", 672 devscope->Length); 673 return (-1); 674 } 675 path_len /= 2; 676 path = (ACPI_DMAR_PCI_PATH *)(devscope + 1); 677 if (path_len == 0) { 678 printf("dmar_find: corrupted DMAR table, dl %d\n", 679 devscope->Length); 680 return (-1); 681 } 682 if (dmar_match_verbose) 683 dmar_print_path(dev, "DMAR", devscope->Bus, path_len, path); 684 685 return (dmar_match_pathes(devscope->Bus, path, path_len, dev_busno, 686 dev_path, dev_path_len, devscope->EntryType)); 687 } 688 689 struct dmar_unit * 690 dmar_find(device_t dev) 691 { 692 device_t dmar_dev; 693 ACPI_DMAR_HARDWARE_UNIT *dmarh; 694 ACPI_DMAR_DEVICE_SCOPE *devscope; 695 char *ptr, *ptrend; 696 int i, match, dev_domain, dev_busno, dev_path_len; 697 698 dmar_dev = NULL; 699 dev_domain = pci_get_domain(dev); 700 dev_path_len = dmar_dev_depth(dev); 701 ACPI_DMAR_PCI_PATH dev_path[dev_path_len]; 702 dmar_dev_path(dev, &dev_busno, dev_path, dev_path_len); 703 if (dmar_match_verbose) 704 dmar_print_path(dev, "PCI", dev_busno, dev_path_len, dev_path); 705 706 for (i = 0; i < dmar_devcnt; i++) { 707 if (dmar_devs[i] == NULL) 708 continue; 709 dmarh = dmar_find_by_index(i); 710 if (dmarh == NULL) 711 continue; 712 if (dmarh->Segment != dev_domain) 713 continue; 714 if ((dmarh->Flags & ACPI_DMAR_INCLUDE_ALL) != 0) { 715 dmar_dev = dmar_devs[i]; 716 if (dmar_match_verbose) { 717 device_printf(dev, 718 "pci%d:%d:%d:%d matched dmar%d INCLUDE_ALL\n", 719 dev_domain, pci_get_bus(dev), 720 pci_get_slot(dev), 721 pci_get_function(dev), 722 ((struct dmar_unit *)device_get_softc( 723 dmar_dev))->unit); 724 } 725 goto found; 726 } 727 ptr = (char *)dmarh + sizeof(*dmarh); 728 ptrend = (char *)dmarh + dmarh->Header.Length; 729 for (;;) { 730 if (ptr >= ptrend) 731 break; 732 devscope = (ACPI_DMAR_DEVICE_SCOPE *)ptr; 733 ptr += devscope->Length; 734 if (dmar_match_verbose) { 735 device_printf(dev, 736 "pci%d:%d:%d:%d matching dmar%d\n", 737 dev_domain, pci_get_bus(dev), 738 pci_get_slot(dev), 739 pci_get_function(dev), 740 ((struct dmar_unit *)device_get_softc( 741 dmar_devs[i]))->unit); 742 } 743 match = dmar_match_devscope(devscope, dev, dev_busno, 744 dev_path, dev_path_len); 745 if (dmar_match_verbose) { 746 if (match == -1) 747 printf("table error\n"); 748 else if (match == 0) 749 printf("not matched\n"); 750 else 751 printf("matched\n"); 752 } 753 if (match == -1) 754 return (NULL); 755 else if (match == 1) { 756 dmar_dev = dmar_devs[i]; 757 goto found; 758 } 759 } 760 } 761 return (NULL); 762 found: 763 return (device_get_softc(dmar_dev)); 764 } 765 766 struct rmrr_iter_args { 767 struct dmar_ctx *ctx; 768 device_t dev; 769 int dev_domain; 770 int dev_busno; 771 ACPI_DMAR_PCI_PATH *dev_path; 772 int dev_path_len; 773 struct dmar_map_entries_tailq *rmrr_entries; 774 }; 775 776 static int 777 dmar_rmrr_iter(ACPI_DMAR_HEADER *dmarh, void *arg) 778 { 779 struct rmrr_iter_args *ria; 780 ACPI_DMAR_RESERVED_MEMORY *resmem; 781 ACPI_DMAR_DEVICE_SCOPE *devscope; 782 struct dmar_map_entry *entry; 783 char *ptr, *ptrend; 784 int match; 785 786 if (dmarh->Type != ACPI_DMAR_TYPE_RESERVED_MEMORY) 787 return (1); 788 789 ria = arg; 790 resmem = (ACPI_DMAR_RESERVED_MEMORY *)dmarh; 791 if (dmar_match_verbose) { 792 printf("RMRR [%jx,%jx] segment %d\n", 793 (uintmax_t)resmem->BaseAddress, 794 (uintmax_t)resmem->EndAddress, 795 resmem->Segment); 796 } 797 if (resmem->Segment != ria->dev_domain) 798 return (1); 799 800 ptr = (char *)resmem + sizeof(*resmem); 801 ptrend = (char *)resmem + resmem->Header.Length; 802 for (;;) { 803 if (ptr >= ptrend) 804 break; 805 devscope = (ACPI_DMAR_DEVICE_SCOPE *)ptr; 806 ptr += devscope->Length; 807 match = dmar_match_devscope(devscope, ria->dev, ria->dev_busno, 808 ria->dev_path, ria->dev_path_len); 809 if (match == 1) { 810 if (dmar_match_verbose) 811 printf("matched\n"); 812 entry = dmar_gas_alloc_entry(ria->ctx, DMAR_PGF_WAITOK); 813 entry->start = resmem->BaseAddress; 814 /* The RMRR entry end address is inclusive. */ 815 entry->end = resmem->EndAddress; 816 TAILQ_INSERT_TAIL(ria->rmrr_entries, entry, 817 unroll_link); 818 } else if (dmar_match_verbose) { 819 printf("not matched, err %d\n", match); 820 } 821 } 822 823 return (1); 824 } 825 826 void 827 dmar_ctx_parse_rmrr(struct dmar_ctx *ctx, device_t dev, 828 struct dmar_map_entries_tailq *rmrr_entries) 829 { 830 struct rmrr_iter_args ria; 831 832 ria.dev_domain = pci_get_domain(dev); 833 ria.dev_path_len = dmar_dev_depth(dev); 834 ACPI_DMAR_PCI_PATH dev_path[ria.dev_path_len]; 835 dmar_dev_path(dev, &ria.dev_busno, dev_path, ria.dev_path_len); 836 837 if (dmar_match_verbose) { 838 device_printf(dev, "parsing RMRR entries for "); 839 dmar_print_path(dev, "PCI", ria.dev_busno, ria.dev_path_len, 840 dev_path); 841 } 842 843 ria.ctx = ctx; 844 ria.dev = dev; 845 ria.dev_path = dev_path; 846 ria.rmrr_entries = rmrr_entries; 847 dmar_iterate_tbl(dmar_rmrr_iter, &ria); 848 } 849 850 struct inst_rmrr_iter_args { 851 struct dmar_unit *dmar; 852 }; 853 854 static device_t 855 dmar_path_dev(int segment, int path_len, int busno, 856 const ACPI_DMAR_PCI_PATH *path) 857 { 858 devclass_t pci_class; 859 device_t bus, pcib, dev; 860 int i; 861 862 pci_class = devclass_find("pci"); 863 dev = NULL; 864 for (i = 0; i < path_len; i++, path++) { 865 dev = pci_find_dbsf(segment, busno, path->Device, 866 path->Function); 867 if (dev == NULL) 868 break; 869 if (i != path_len - 1) { 870 bus = device_get_parent(dev); 871 pcib = device_get_parent(bus); 872 if (device_get_devclass(device_get_parent(pcib)) != 873 pci_class) 874 return (NULL); 875 } 876 busno = pcib_get_bus(dev); 877 } 878 return (dev); 879 } 880 881 static int 882 dmar_inst_rmrr_iter(ACPI_DMAR_HEADER *dmarh, void *arg) 883 { 884 const ACPI_DMAR_RESERVED_MEMORY *resmem; 885 const ACPI_DMAR_DEVICE_SCOPE *devscope; 886 struct inst_rmrr_iter_args *iria; 887 const char *ptr, *ptrend; 888 struct dmar_unit *dev_dmar; 889 device_t dev; 890 891 if (dmarh->Type != ACPI_DMAR_TYPE_RESERVED_MEMORY) 892 return (1); 893 894 iria = arg; 895 resmem = (ACPI_DMAR_RESERVED_MEMORY *)dmarh; 896 if (resmem->Segment != iria->dmar->segment) 897 return (1); 898 if (dmar_match_verbose) { 899 printf("dmar%d: RMRR [%jx,%jx]\n", iria->dmar->unit, 900 (uintmax_t)resmem->BaseAddress, 901 (uintmax_t)resmem->EndAddress); 902 } 903 904 ptr = (const char *)resmem + sizeof(*resmem); 905 ptrend = (const char *)resmem + resmem->Header.Length; 906 for (;;) { 907 if (ptr >= ptrend) 908 break; 909 devscope = (const ACPI_DMAR_DEVICE_SCOPE *)ptr; 910 ptr += devscope->Length; 911 /* XXXKIB bridge */ 912 if (devscope->EntryType != ACPI_DMAR_SCOPE_TYPE_ENDPOINT) 913 continue; 914 if (dmar_match_verbose) { 915 dmar_print_path(iria->dmar->dev, "RMRR scope", 916 devscope->Bus, (devscope->Length - 917 sizeof(ACPI_DMAR_DEVICE_SCOPE)) / 2, 918 (const ACPI_DMAR_PCI_PATH *)(devscope + 1)); 919 } 920 dev = dmar_path_dev(resmem->Segment, (devscope->Length - 921 sizeof(ACPI_DMAR_DEVICE_SCOPE)) / 2, devscope->Bus, 922 (const ACPI_DMAR_PCI_PATH *)(devscope + 1)); 923 if (dev == NULL) { 924 if (dmar_match_verbose) 925 printf("null dev\n"); 926 continue; 927 } 928 dev_dmar = dmar_find(dev); 929 if (dev_dmar != iria->dmar) { 930 if (dmar_match_verbose) { 931 printf("dmar%d matched, skipping\n", 932 dev_dmar->unit); 933 } 934 continue; 935 } 936 if (dmar_match_verbose) 937 printf("matched, instantiating RMRR context\n"); 938 dmar_instantiate_ctx(iria->dmar, dev, true); 939 } 940 941 return (1); 942 943 } 944 945 /* 946 * Pre-create all contexts for the DMAR which have RMRR entries. 947 */ 948 int 949 dmar_instantiate_rmrr_ctxs(struct dmar_unit *dmar) 950 { 951 struct inst_rmrr_iter_args iria; 952 int error; 953 954 if (!dmar_barrier_enter(dmar, DMAR_BARRIER_RMRR)) 955 return (0); 956 957 error = 0; 958 iria.dmar = dmar; 959 if (dmar_match_verbose) 960 printf("dmar%d: instantiating RMRR contexts\n", dmar->unit); 961 dmar_iterate_tbl(dmar_inst_rmrr_iter, &iria); 962 DMAR_LOCK(dmar); 963 if (!LIST_EMPTY(&dmar->contexts)) { 964 KASSERT((dmar->hw_gcmd & DMAR_GCMD_TE) == 0, 965 ("dmar%d: RMRR not handled but translation is already enabled", 966 dmar->unit)); 967 error = dmar_enable_translation(dmar); 968 } 969 dmar_barrier_exit(dmar, DMAR_BARRIER_RMRR); 970 return (error); 971 } 972 973 #ifdef DDB 974 #include <ddb/ddb.h> 975 #include <ddb/db_lex.h> 976 977 static void 978 dmar_print_ctx_entry(const struct dmar_map_entry *entry) 979 { 980 struct dmar_map_entry *l, *r; 981 982 db_printf( 983 " start %jx end %jx free_after %jx free_down %jx flags %x ", 984 entry->start, entry->end, entry->free_after, entry->free_down, 985 entry->flags); 986 db_printf("left "); 987 l = RB_LEFT(entry, rb_entry); 988 if (l == NULL) 989 db_printf("NULL "); 990 else 991 db_printf("%jx ", l->start); 992 db_printf("right "); 993 r = RB_RIGHT(entry, rb_entry); 994 if (r == NULL) 995 db_printf("NULL"); 996 else 997 db_printf("%jx", r->start); 998 db_printf("\n"); 999 } 1000 1001 static void 1002 dmar_print_ctx(struct dmar_ctx *ctx, bool show_mappings) 1003 { 1004 struct dmar_map_entry *entry; 1005 1006 db_printf( 1007 " @%p pci%d:%d:%d dom %d mgaw %d agaw %d pglvl %d end %jx\n" 1008 " refs %d flags %x pgobj %p map_ents %u loads %lu unloads %lu\n", 1009 ctx, pci_get_bus(ctx->ctx_tag.owner), 1010 pci_get_slot(ctx->ctx_tag.owner), 1011 pci_get_function(ctx->ctx_tag.owner), ctx->domain, ctx->mgaw, 1012 ctx->agaw, ctx->pglvl, (uintmax_t)ctx->end, ctx->refs, 1013 ctx->flags, ctx->pgtbl_obj, ctx->entries_cnt, ctx->loads, 1014 ctx->unloads); 1015 if (!show_mappings) 1016 return; 1017 db_printf(" mapped:\n"); 1018 RB_FOREACH(entry, dmar_gas_entries_tree, &ctx->rb_root) { 1019 dmar_print_ctx_entry(entry); 1020 if (db_pager_quit) 1021 break; 1022 } 1023 if (db_pager_quit) 1024 return; 1025 db_printf(" unloading:\n"); 1026 TAILQ_FOREACH(entry, &ctx->unload_entries, dmamap_link) { 1027 dmar_print_ctx_entry(entry); 1028 if (db_pager_quit) 1029 break; 1030 } 1031 } 1032 1033 DB_FUNC(dmar_ctx, db_dmar_print_ctx, db_show_table, CS_OWN, NULL) 1034 { 1035 struct dmar_unit *unit; 1036 struct dmar_ctx *ctx; 1037 bool show_mappings, valid; 1038 int domain, bus, device, function, i, t; 1039 db_expr_t radix; 1040 1041 valid = false; 1042 radix = db_radix; 1043 db_radix = 10; 1044 t = db_read_token(); 1045 if (t == tSLASH) { 1046 t = db_read_token(); 1047 if (t != tIDENT) { 1048 db_printf("Bad modifier\n"); 1049 db_radix = radix; 1050 db_skip_to_eol(); 1051 return; 1052 } 1053 show_mappings = strchr(db_tok_string, 'm') != NULL; 1054 t = db_read_token(); 1055 } else { 1056 show_mappings = false; 1057 } 1058 if (t == tNUMBER) { 1059 domain = db_tok_number; 1060 t = db_read_token(); 1061 if (t == tNUMBER) { 1062 bus = db_tok_number; 1063 t = db_read_token(); 1064 if (t == tNUMBER) { 1065 device = db_tok_number; 1066 t = db_read_token(); 1067 if (t == tNUMBER) { 1068 function = db_tok_number; 1069 valid = true; 1070 } 1071 } 1072 } 1073 } 1074 db_radix = radix; 1075 db_skip_to_eol(); 1076 if (!valid) { 1077 db_printf("usage: show dmar_ctx [/m] " 1078 "<domain> <bus> <device> <func>\n"); 1079 return; 1080 } 1081 for (i = 0; i < dmar_devcnt; i++) { 1082 unit = device_get_softc(dmar_devs[i]); 1083 LIST_FOREACH(ctx, &unit->contexts, link) { 1084 if (domain == unit->segment && 1085 bus == pci_get_bus(ctx->ctx_tag.owner) && 1086 device == pci_get_slot(ctx->ctx_tag.owner) && 1087 function == pci_get_function(ctx->ctx_tag.owner)) { 1088 dmar_print_ctx(ctx, show_mappings); 1089 goto out; 1090 } 1091 } 1092 } 1093 out:; 1094 } 1095 1096 static void 1097 dmar_print_one(int idx, bool show_ctxs, bool show_mappings) 1098 { 1099 struct dmar_unit *unit; 1100 struct dmar_ctx *ctx; 1101 int i, frir; 1102 1103 unit = device_get_softc(dmar_devs[idx]); 1104 db_printf("dmar%d at %p, root at 0x%jx, ver 0x%x\n", unit->unit, unit, 1105 dmar_read8(unit, DMAR_RTADDR_REG), dmar_read4(unit, DMAR_VER_REG)); 1106 db_printf("cap 0x%jx ecap 0x%jx gsts 0x%x fsts 0x%x fectl 0x%x\n", 1107 (uintmax_t)dmar_read8(unit, DMAR_CAP_REG), 1108 (uintmax_t)dmar_read8(unit, DMAR_ECAP_REG), 1109 dmar_read4(unit, DMAR_GSTS_REG), 1110 dmar_read4(unit, DMAR_FSTS_REG), 1111 dmar_read4(unit, DMAR_FECTL_REG)); 1112 db_printf("fed 0x%x fea 0x%x feua 0x%x\n", 1113 dmar_read4(unit, DMAR_FEDATA_REG), 1114 dmar_read4(unit, DMAR_FEADDR_REG), 1115 dmar_read4(unit, DMAR_FEUADDR_REG)); 1116 db_printf("primary fault log:\n"); 1117 for (i = 0; i < DMAR_CAP_NFR(unit->hw_cap); i++) { 1118 frir = (DMAR_CAP_FRO(unit->hw_cap) + i) * 16; 1119 db_printf(" %d at 0x%x: %jx %jx\n", i, frir, 1120 (uintmax_t)dmar_read8(unit, frir), 1121 (uintmax_t)dmar_read8(unit, frir + 8)); 1122 } 1123 if (DMAR_HAS_QI(unit)) { 1124 db_printf("ied 0x%x iea 0x%x ieua 0x%x\n", 1125 dmar_read4(unit, DMAR_IEDATA_REG), 1126 dmar_read4(unit, DMAR_IEADDR_REG), 1127 dmar_read4(unit, DMAR_IEUADDR_REG)); 1128 if (unit->qi_enabled) { 1129 db_printf("qi is enabled: queue @0x%jx (IQA 0x%jx) " 1130 "size 0x%jx\n" 1131 " head 0x%x tail 0x%x avail 0x%x status 0x%x ctrl 0x%x\n" 1132 " hw compl 0x%x@%p/phys@%jx next seq 0x%x gen 0x%x\n", 1133 (uintmax_t)unit->inv_queue, 1134 (uintmax_t)dmar_read8(unit, DMAR_IQA_REG), 1135 (uintmax_t)unit->inv_queue_size, 1136 dmar_read4(unit, DMAR_IQH_REG), 1137 dmar_read4(unit, DMAR_IQT_REG), 1138 unit->inv_queue_avail, 1139 dmar_read4(unit, DMAR_ICS_REG), 1140 dmar_read4(unit, DMAR_IECTL_REG), 1141 unit->inv_waitd_seq_hw, 1142 &unit->inv_waitd_seq_hw, 1143 (uintmax_t)unit->inv_waitd_seq_hw_phys, 1144 unit->inv_waitd_seq, 1145 unit->inv_waitd_gen); 1146 } else { 1147 db_printf("qi is disabled\n"); 1148 } 1149 } 1150 if (show_ctxs) { 1151 db_printf("contexts:\n"); 1152 LIST_FOREACH(ctx, &unit->contexts, link) { 1153 dmar_print_ctx(ctx, show_mappings); 1154 if (db_pager_quit) 1155 break; 1156 } 1157 } 1158 } 1159 1160 DB_SHOW_COMMAND(dmar, db_dmar_print) 1161 { 1162 bool show_ctxs, show_mappings; 1163 1164 show_ctxs = strchr(modif, 'c') != NULL; 1165 show_mappings = strchr(modif, 'm') != NULL; 1166 if (!have_addr) { 1167 db_printf("usage: show dmar [/c] [/m] index\n"); 1168 return; 1169 } 1170 dmar_print_one((int)addr, show_ctxs, show_mappings); 1171 } 1172 1173 DB_SHOW_ALL_COMMAND(dmars, db_show_all_dmars) 1174 { 1175 int i; 1176 bool show_ctxs, show_mappings; 1177 1178 show_ctxs = strchr(modif, 'c') != NULL; 1179 show_mappings = strchr(modif, 'm') != NULL; 1180 1181 for (i = 0; i < dmar_devcnt; i++) { 1182 dmar_print_one(i, show_ctxs, show_mappings); 1183 if (db_pager_quit) 1184 break; 1185 } 1186 } 1187 #endif 1188