1 /* $NetBSD: acpi.c,v 1.305 2026/06/22 01:48:05 tls Exp $ */ 2 3 /*- 4 * Copyright (c) 2003, 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum of By Noon Software, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 2003 Wasabi Systems, Inc. 34 * All rights reserved. 35 * 36 * Written by Frank van der Linden for Wasabi Systems, Inc. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed for the NetBSD Project by 49 * Wasabi Systems, Inc. 50 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 51 * or promote products derived from this software without specific prior 52 * written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 56 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 57 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 58 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 59 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 60 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 61 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 62 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 63 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 64 * POSSIBILITY OF SUCH DAMAGE. 65 */ 66 67 /* 68 * Copyright 2001, 2003 Wasabi Systems, Inc. 69 * All rights reserved. 70 * 71 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 72 * 73 * Redistribution and use in source and binary forms, with or without 74 * modification, are permitted provided that the following conditions 75 * are met: 76 * 1. Redistributions of source code must retain the above copyright 77 * notice, this list of conditions and the following disclaimer. 78 * 2. Redistributions in binary form must reproduce the above copyright 79 * notice, this list of conditions and the following disclaimer in the 80 * documentation and/or other materials provided with the distribution. 81 * 3. All advertising materials mentioning features or use of this software 82 * must display the following acknowledgement: 83 * This product includes software developed for the NetBSD Project by 84 * Wasabi Systems, Inc. 85 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 86 * or promote products derived from this software without specific prior 87 * written permission. 88 * 89 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 90 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 91 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 92 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 93 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 94 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 95 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 96 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 97 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 98 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 99 * POSSIBILITY OF SUCH DAMAGE. 100 */ 101 102 #include <sys/cdefs.h> 103 __KERNEL_RCSID(0, "$NetBSD: acpi.c,v 1.305 2026/06/22 01:48:05 tls Exp $"); 104 105 #include "pci.h" 106 #include "opt_acpi.h" 107 #include "opt_pcifixup.h" 108 109 #include <sys/param.h> 110 #include <sys/atomic.h> 111 #include <sys/device.h> 112 #include <sys/kernel.h> 113 #include <sys/kmem.h> 114 #include <sys/malloc.h> 115 #include <sys/module.h> 116 #include <sys/mutex.h> 117 #include <sys/rndsource.h> 118 #include <sys/sysctl.h> 119 #include <sys/systm.h> 120 #include <sys/timetc.h> 121 122 #include <dev/acpi/acpireg.h> 123 #include <dev/acpi/acpivar.h> 124 #include <dev/acpi/acpi_mcfg.h> 125 #include <dev/acpi/acpi_osd.h> 126 #include <dev/acpi/acpi_pci.h> 127 #include <dev/acpi/acpi_power.h> 128 #include <dev/acpi/acpi_timer.h> 129 #include <dev/acpi/acpi_wakedev.h> 130 131 #include <machine/acpi_machdep.h> 132 133 #include "ioconf.h" 134 135 #define _COMPONENT ACPI_BUS_COMPONENT 136 ACPI_MODULE_NAME ("acpi") 137 138 /* 139 * The acpi_active variable is set when the ACPI subsystem is active. 140 * Machine-dependent code may wish to skip other steps (such as attaching 141 * subsystems that ACPI supercedes) when ACPI is active. 142 */ 143 int acpi_active = 0; 144 int acpi_suspended = 0; 145 int acpi_force_load = 0; 146 int acpi_verbose_loaded = 0; 147 148 struct acpi_softc *acpi_softc = NULL; 149 static uint64_t acpi_root_pointer; 150 extern kmutex_t acpi_interrupt_list_mtx; 151 static ACPI_HANDLE acpi_scopes[4]; 152 ACPI_TABLE_HEADER *madt_header; 153 ACPI_TABLE_HEADER *gtdt_header; 154 155 /* 156 * This structure provides a context for the ACPI 157 * namespace walk performed in acpi_build_tree(). 158 */ 159 struct acpi_walkcontext { 160 struct acpi_softc *aw_sc; 161 struct acpi_devnode *aw_parent; 162 }; 163 164 /* 165 * Ignored HIDs. 166 */ 167 static const char * const acpi_ignored_ids[] = { 168 #if defined(i386) || defined(x86_64) 169 "ACPI0007", /* ACPI CPUs do not attach to acpi(4) */ 170 "PNP0000", /* AT interrupt controller is handled internally */ 171 "PNP0001", /* EISA interrupt controller is handled internally */ 172 "PNP0200", /* AT DMA controller is handled internally */ 173 "PNP0A??", /* PCI Busses are handled internally */ 174 "PNP0B00", /* AT RTC is handled internally */ 175 "PNP0C02", /* PnP motherboard resources */ 176 "PNP0C0F", /* ACPI PCI link devices are handled internally */ 177 #endif 178 #if defined(x86_64) 179 "PNP0C04", /* FPU is handled internally */ 180 #endif 181 #if defined(__aarch64__) 182 "ACPI0004", /* ACPI module devices are handled internally */ 183 "PNP0C0F", /* ACPI PCI link devices are handled internally */ 184 #endif 185 NULL 186 }; 187 188 /* 189 * Devices that should be attached early. 190 */ 191 static const char * const acpi_early_ids[] = { 192 "PNP0C09", /* acpiec(4) */ 193 NULL 194 }; 195 196 static int acpi_match(device_t, cfdata_t, void *); 197 static int acpi_submatch(device_t, cfdata_t, const int *, void *); 198 static void acpi_attach(device_t, device_t, void *); 199 static int acpi_detach(device_t, int); 200 static void acpi_childdet(device_t, device_t); 201 static bool acpi_suspend(device_t, const pmf_qual_t *); 202 static bool acpi_resume(device_t, const pmf_qual_t *); 203 204 static void acpi_build_tree(struct acpi_softc *); 205 static void acpi_find_deps(struct acpi_softc *); 206 static void acpi_config_tree(struct acpi_softc *); 207 static void acpi_config_dma(struct acpi_softc *); 208 static ACPI_STATUS acpi_make_devnode(ACPI_HANDLE, uint32_t, 209 void *, void **); 210 static ACPI_STATUS acpi_make_devnode_post(ACPI_HANDLE, uint32_t, 211 void *, void **); 212 static void acpi_make_name(struct acpi_devnode *, uint32_t); 213 214 static int acpi_rescan(device_t, const char *, const int *); 215 static void acpi_rescan_early(struct acpi_softc *); 216 static void acpi_rescan_nodes(struct acpi_softc *); 217 static void acpi_rescan_capabilities(device_t); 218 static int acpi_print(void *aux, const char *); 219 220 static void acpi_notify_handler(ACPI_HANDLE, uint32_t, void *); 221 222 static void acpi_register_fixed_button(struct acpi_softc *, int); 223 static void acpi_deregister_fixed_button(struct acpi_softc *, int); 224 static uint32_t acpi_fixed_button_handler(void *); 225 static void acpi_fixed_button_pressed(void *); 226 227 static void acpi_sleep_init(struct acpi_softc *); 228 229 static int sysctl_hw_acpi_fixedstats(SYSCTLFN_PROTO); 230 static int sysctl_hw_acpi_sleepstate(SYSCTLFN_PROTO); 231 static int sysctl_hw_acpi_sleepstates(SYSCTLFN_PROTO); 232 233 static bool acpi_is_scope(struct acpi_devnode *); 234 static ACPI_TABLE_HEADER *acpi_map_rsdt(void); 235 static void acpi_unmap_rsdt(ACPI_TABLE_HEADER *); 236 237 void acpi_print_verbose_stub(struct acpi_softc *); 238 void acpi_print_dev_stub(const char *); 239 240 static void acpi_activate_device(ACPI_HANDLE, ACPI_DEVICE_INFO **); 241 ACPI_STATUS acpi_allocate_resources(ACPI_HANDLE); 242 243 void (*acpi_print_verbose)(struct acpi_softc *) = acpi_print_verbose_stub; 244 void (*acpi_print_dev)(const char *) = acpi_print_dev_stub; 245 246 bus_dma_tag_t acpi_default_dma_tag(struct acpi_softc *, struct acpi_devnode *); 247 bus_dma_tag_t acpi_default_dma64_tag(struct acpi_softc *, struct acpi_devnode *); 248 pci_chipset_tag_t acpi_default_pci_chipset_tag(struct acpi_softc *, int, int); 249 250 CFATTACH_DECL2_NEW(acpi, sizeof(struct acpi_softc), 251 acpi_match, acpi_attach, acpi_detach, NULL, acpi_rescan, acpi_childdet); 252 253 /* 254 * Probe for ACPI support. 255 * 256 * This is called by the machine-dependent ACPI front-end. 257 * Note: this is not an autoconfiguration interface function. 258 */ 259 int 260 acpi_probe(void) 261 { 262 ACPI_TABLE_HEADER *rsdt; 263 ACPI_STATUS rv; 264 int quirks; 265 266 if (acpi_softc != NULL) 267 panic("%s: already probed", __func__); 268 269 mutex_init(&acpi_interrupt_list_mtx, MUTEX_DEFAULT, IPL_NONE); 270 271 /* 272 * Start up ACPICA. 273 */ 274 AcpiGbl_EnableInterpreterSlack = true; 275 276 rv = AcpiInitializeSubsystem(); 277 278 if (ACPI_FAILURE(rv)) { 279 aprint_error("%s: failed to initialize subsystem\n", __func__); 280 return 0; 281 } 282 283 /* 284 * Allocate space for RSDT/XSDT and DSDT, 285 * but allow resizing if more tables exist. 286 */ 287 rv = AcpiInitializeTables(NULL, 2, true); 288 289 if (ACPI_FAILURE(rv)) { 290 aprint_error("%s: failed to initialize tables\n", __func__); 291 goto fail; 292 } 293 294 rv = AcpiLoadTables(); 295 296 if (ACPI_FAILURE(rv)) { 297 aprint_error("%s: failed to load tables\n", __func__); 298 goto fail; 299 } 300 301 rsdt = acpi_map_rsdt(); 302 303 if (rsdt == NULL) { 304 aprint_error("%s: failed to map RSDT\n", __func__); 305 goto fail; 306 } 307 308 quirks = acpi_find_quirks(); 309 310 if (acpi_force_load == 0 && (quirks & ACPI_QUIRK_BROKEN) != 0) { 311 312 aprint_normal("ACPI: BIOS is listed as broken:\n"); 313 aprint_normal("ACPI: X/RSDT: OemId <%6.6s,%8.8s,%08x>, " 314 "AslId <%4.4s,%08x>\n", rsdt->OemId, rsdt->OemTableId, 315 rsdt->OemRevision, rsdt->AslCompilerId, 316 rsdt->AslCompilerRevision); 317 aprint_normal("ACPI: Not used. Set acpi_force_load to use.\n"); 318 319 acpi_unmap_rsdt(rsdt); 320 goto fail; 321 } 322 323 if (acpi_force_load == 0 && (quirks & ACPI_QUIRK_OLDBIOS) != 0) { 324 325 aprint_normal("ACPI: BIOS is too old (%s). " 326 "Set acpi_force_load to use.\n", 327 pmf_get_platform("bios-date")); 328 329 acpi_unmap_rsdt(rsdt); 330 goto fail; 331 } 332 333 acpi_unmap_rsdt(rsdt); 334 335 rv = AcpiEnableSubsystem(~(ACPI_NO_HARDWARE_INIT|ACPI_NO_ACPI_ENABLE)); 336 337 if (ACPI_FAILURE(rv)) { 338 aprint_error("%s: failed to enable subsystem\n", __func__); 339 goto fail; 340 } 341 342 return 1; 343 344 fail: 345 (void)AcpiTerminate(); 346 347 return 0; 348 } 349 350 void 351 acpi_disable(void) 352 { 353 354 if (acpi_softc == NULL) 355 return; 356 357 KASSERT(acpi_active != 0); 358 359 if (AcpiGbl_FADT.SmiCommand != 0) 360 AcpiDisable(); 361 } 362 363 int 364 acpi_check(device_t parent, const char *ifattr) 365 { 366 return config_search(parent, NULL, 367 CFARGS(.submatch = acpi_submatch, 368 .iattr = ifattr)) != NULL; 369 } 370 371 int 372 acpi_reset(void) 373 { 374 struct acpi_softc *sc = acpi_softc; 375 ACPI_GENERIC_ADDRESS *ResetReg; 376 ACPI_PCI_ID PciId; 377 ACPI_STATUS status; 378 379 if (sc == NULL) 380 return ENXIO; 381 382 ResetReg = &AcpiGbl_FADT.ResetRegister; 383 384 /* Check if the reset register is supported */ 385 if (!(AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) || 386 !ResetReg->Address) { 387 return ENOENT; 388 } 389 390 switch (ResetReg->SpaceId) { 391 case ACPI_ADR_SPACE_PCI_CONFIG: 392 PciId.Segment = PciId.Bus = 0; 393 PciId.Device = ACPI_GAS_PCI_DEV(ResetReg->Address); 394 PciId.Function = ACPI_GAS_PCI_FUNC(ResetReg->Address); 395 status = AcpiOsWritePciConfiguration(&PciId, 396 ACPI_GAS_PCI_REGOFF(ResetReg->Address), 397 AcpiGbl_FADT.ResetValue, ResetReg->BitWidth); 398 break; 399 case ACPI_ADR_SPACE_SYSTEM_IO: 400 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 401 status = AcpiReset(); 402 break; 403 default: 404 status = AE_TYPE; 405 break; 406 } 407 408 return ACPI_FAILURE(status) ? EIO : 0; 409 } 410 411 /* 412 * Autoconfiguration. 413 */ 414 static int 415 acpi_match(device_t parent, cfdata_t match, void *aux) 416 { 417 /* 418 * XXX: Nada; MD code has called acpi_probe(). 419 */ 420 return 1; 421 } 422 423 static int 424 acpi_submatch(device_t parent, cfdata_t cf, const int *locs, void *aux) 425 { 426 struct cfattach *ca; 427 428 ca = config_cfattach_lookup(cf->cf_name, cf->cf_atname); 429 430 return (ca == &acpi_ca); 431 } 432 433 static void 434 acpi_attach(device_t parent, device_t self, void *aux) 435 { 436 struct acpi_softc *sc = device_private(self); 437 struct acpibus_attach_args *aa = aux; 438 ACPI_TABLE_HEADER *rsdt, *hdr, *oem0; 439 ACPI_STATUS rv; 440 int i; 441 442 aprint_naive("\n"); 443 aprint_normal(": Intel ACPICA %08x\n", ACPI_CA_VERSION); 444 445 if (acpi_softc != NULL) 446 panic("%s: already attached", __func__); 447 448 rsdt = acpi_map_rsdt(); 449 450 if (rsdt == NULL) 451 aprint_error_dev(self, "X/RSDT: Not found\n"); 452 else { 453 aprint_verbose_dev(self, 454 "X/RSDT: OemId <%6.6s,%8.8s,%08x>, AslId <%4.4s,%08x>\n", 455 rsdt->OemId, rsdt->OemTableId, 456 rsdt->OemRevision, 457 rsdt->AslCompilerId, rsdt->AslCompilerRevision); 458 } 459 460 acpi_unmap_rsdt(rsdt); 461 462 sc->sc_dev = self; 463 sc->sc_root = NULL; 464 465 sc->sc_sleepstate = ACPI_STATE_S0; 466 sc->sc_quirks = acpi_find_quirks(); 467 468 sysmon_power_settype("acpi"); 469 470 sc->sc_iot = aa->aa_iot; 471 sc->sc_memt = aa->aa_memt; 472 sc->sc_pciflags = aa->aa_pciflags; 473 sc->sc_ic = aa->aa_ic; 474 sc->sc_dmat = aa->aa_dmat; 475 sc->sc_dmat64 = aa->aa_dmat64; 476 477 SIMPLEQ_INIT(&sc->sc_head); 478 479 acpi_softc = sc; 480 481 if (pmf_device_register(self, acpi_suspend, acpi_resume) != true) 482 aprint_error_dev(self, "couldn't establish power handler\n"); 483 484 /* 485 * Bring ACPICA on-line. 486 */ 487 488 rv = AcpiEnableSubsystem(ACPI_FULL_INITIALIZATION); 489 490 if (ACPI_FAILURE(rv)) 491 goto fail; 492 493 /* 494 * Early initialization of acpiec(4) via ECDT. 495 */ 496 config_found(self, aa, NULL, 497 CFARGS(.iattr = "acpiecdtbus")); 498 499 rv = AcpiInitializeObjects(ACPI_FULL_INITIALIZATION); 500 501 if (ACPI_FAILURE(rv)) 502 goto fail; 503 504 /* 505 * Scan the namespace and build our device tree. 506 */ 507 acpi_build_tree(sc); 508 509 #if NPCI > 0 510 /* 511 * Probe MCFG table 512 */ 513 acpimcfg_probe(sc); 514 #endif 515 516 acpi_md_callback(sc); 517 518 /* 519 * Early initialization of the _PDC control method 520 * that may load additional SSDT tables dynamically. 521 */ 522 (void)acpi_md_pdc(); 523 524 /* 525 * Install global notify handlers. 526 */ 527 rv = AcpiInstallNotifyHandler(ACPI_ROOT_OBJECT, 528 ACPI_SYSTEM_NOTIFY, acpi_notify_handler, NULL); 529 530 if (ACPI_FAILURE(rv)) 531 goto fail; 532 533 rv = AcpiInstallNotifyHandler(ACPI_ROOT_OBJECT, 534 ACPI_DEVICE_NOTIFY, acpi_notify_handler, NULL); 535 536 if (ACPI_FAILURE(rv)) 537 goto fail; 538 539 acpi_active = 1; 540 541 if (!AcpiGbl_ReducedHardware) { 542 /* Show SCI interrupt. */ 543 aprint_verbose_dev(self, "SCI interrupting at int %u\n", 544 AcpiGbl_FADT.SciInterrupt); 545 546 /* 547 * Install fixed-event handlers. 548 */ 549 acpi_register_fixed_button(sc, ACPI_EVENT_POWER_BUTTON); 550 acpi_register_fixed_button(sc, ACPI_EVENT_SLEEP_BUTTON); 551 } 552 553 /* 554 * Load drivers that operate on System Description Tables. 555 */ 556 for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i) { 557 rv = AcpiGetTableByIndex(i, &hdr); 558 if (ACPI_FAILURE(rv)) { 559 continue; 560 } 561 config_found(sc->sc_dev, hdr, NULL, 562 CFARGS(.iattr = "acpisdtbus")); 563 AcpiPutTable(hdr); 564 } 565 566 acpitimer_init(sc); 567 acpi_config_tree(sc); 568 acpi_sleep_init(sc); 569 570 #ifdef ACPI_DEBUG 571 acpi_debug_init(); 572 #endif 573 574 /* 575 * Microsoft Hyper-V drops off entropy from the Windows system RNG 576 * in the OEM0 table of its guests. Consume and clear it as early 577 * as possible. 578 */ 579 rv = AcpiGetTable("OEM0", 1, &oem0); 580 if (ACPI_SUCCESS(rv) && oem0 != NULL) { 581 if (memcmp(oem0->OemId, "VRTUAL", 6) == 0 && 582 memcmp(oem0->OemTableId, "MICROSFT", 8) == 0) { 583 struct krndsource hvrs; 584 uint8_t *hostrnd; 585 size_t hrlen; 586 587 memset(&hvrs, 0, sizeof(hvrs)); 588 rnd_attach_source(&hvrs, "Hyper-V OEM0", 589 RND_TYPE_UNKNOWN, RND_FLAG_DEFAULT); 590 hostrnd = (uint8_t *)oem0 + sizeof(ACPI_TABLE_HEADER); 591 hrlen = oem0->Length - sizeof(ACPI_TABLE_HEADER); 592 rnd_add_data(&hvrs, hostrnd, hrlen, hrlen * NBBY); 593 /* Now wipe it out - hide from /dev/acpi access */ 594 explicit_memset(hostrnd, 0, hrlen); 595 rnd_detach_source(&hvrs); 596 aprint_normal_dev(self, 597 "Hyper-V OEM0 entropy consumed and wiped\n"); 598 } 599 } 600 /* 601 * Print debug information. 602 */ 603 acpi_print_verbose(sc); 604 605 return; 606 607 fail: 608 aprint_error("%s: failed to initialize ACPI: %s\n", 609 __func__, AcpiFormatException(rv)); 610 } 611 612 /* 613 * XXX: This is incomplete. 614 */ 615 static int 616 acpi_detach(device_t self, int flags) 617 { 618 struct acpi_softc *sc = device_private(self); 619 ACPI_STATUS rv; 620 int rc; 621 622 rv = AcpiRemoveNotifyHandler(ACPI_ROOT_OBJECT, 623 ACPI_SYSTEM_NOTIFY, acpi_notify_handler); 624 625 if (ACPI_FAILURE(rv)) 626 return EBUSY; 627 628 rv = AcpiRemoveNotifyHandler(ACPI_ROOT_OBJECT, 629 ACPI_DEVICE_NOTIFY, acpi_notify_handler); 630 631 if (ACPI_FAILURE(rv)) 632 return EBUSY; 633 634 if ((rc = config_detach_children(self, flags)) != 0) 635 return rc; 636 637 if ((rc = acpitimer_detach()) != 0) 638 return rc; 639 640 if (!AcpiGbl_ReducedHardware) { 641 acpi_deregister_fixed_button(sc, ACPI_EVENT_POWER_BUTTON); 642 acpi_deregister_fixed_button(sc, ACPI_EVENT_SLEEP_BUTTON); 643 } 644 645 pmf_device_deregister(self); 646 647 acpi_softc = NULL; 648 649 return 0; 650 } 651 652 static void 653 acpi_childdet(device_t self, device_t child) 654 { 655 struct acpi_softc *sc = device_private(self); 656 struct acpi_devnode *ad; 657 658 if (sc->sc_apmbus == child) 659 sc->sc_apmbus = NULL; 660 661 if (sc->sc_hpet == child) 662 sc->sc_hpet = NULL; 663 664 if (sc->sc_wdrt == child) 665 sc->sc_wdrt = NULL; 666 667 if (sc->sc_apei == child) 668 sc->sc_apei = NULL; 669 670 SIMPLEQ_FOREACH(ad, &sc->sc_head, ad_list) { 671 672 if (ad->ad_device == child) 673 ad->ad_device = NULL; 674 } 675 } 676 677 static bool 678 acpi_suspend(device_t dv, const pmf_qual_t *qual) 679 { 680 681 acpi_suspended = 1; 682 683 return true; 684 } 685 686 static bool 687 acpi_resume(device_t dv, const pmf_qual_t *qual) 688 { 689 690 acpi_suspended = 0; 691 692 return true; 693 } 694 695 /* 696 * Namespace scan. 697 */ 698 static void 699 acpi_build_tree(struct acpi_softc *sc) 700 { 701 struct acpi_walkcontext awc; 702 703 /* 704 * Get the root scope handles. 705 */ 706 KASSERT(__arraycount(acpi_scopes) == 4); 707 708 (void)AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_PR_", &acpi_scopes[0]); 709 (void)AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &acpi_scopes[1]); 710 (void)AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SI_", &acpi_scopes[2]); 711 (void)AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_TZ_", &acpi_scopes[3]); 712 713 /* 714 * Make the root node. 715 */ 716 awc.aw_sc = sc; 717 awc.aw_parent = NULL; 718 719 (void)acpi_make_devnode(ACPI_ROOT_OBJECT, 0, &awc, NULL); 720 721 KASSERT(sc->sc_root == NULL); 722 KASSERT(awc.aw_parent != NULL); 723 724 sc->sc_root = awc.aw_parent; 725 726 /* 727 * Build the internal namespace. 728 */ 729 (void)AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, UINT32_MAX, 730 acpi_make_devnode, acpi_make_devnode_post, &awc, NULL); 731 732 /* 733 * Find device dependencies. 734 */ 735 acpi_find_deps(sc); 736 737 #if NPCI > 0 738 /* 739 * Scan the internal namespace. 740 */ 741 (void)acpi_pcidev_scan(sc->sc_root); 742 #endif 743 } 744 745 static void 746 acpi_add_dep(struct acpi_devnode *ad, struct acpi_devnode *depad) 747 { 748 struct acpi_devnodedep *dd; 749 750 dd = kmem_alloc(sizeof(*dd), KM_SLEEP); 751 dd->dd_node = depad; 752 SIMPLEQ_INSERT_TAIL(&ad->ad_deps, dd, dd_list); 753 } 754 755 static void 756 acpi_find_deps(struct acpi_softc *sc) 757 { 758 struct acpi_devnode *ad; 759 760 SIMPLEQ_FOREACH(ad, &sc->sc_head, ad_list) { 761 struct acpi_devnode *depad; 762 ACPI_OBJECT *obj; 763 ACPI_HANDLE _dep; 764 ACPI_BUFFER buf; 765 ACPI_STATUS rv; 766 u_int ref; 767 768 if (acpi_is_scope(ad) || 769 ad->ad_parent == NULL || 770 ad->ad_devinfo->Type != ACPI_TYPE_DEVICE) { 771 continue; 772 } 773 774 /* Add an implicit dependency on parent devices. */ 775 if (!acpi_is_scope(ad->ad_parent) && 776 ad->ad_parent->ad_devinfo->Type == ACPI_TYPE_DEVICE) { 777 acpi_add_dep(ad, ad->ad_parent); 778 } 779 780 rv = AcpiGetHandle(ad->ad_handle, "_DEP", &_dep); 781 if (ACPI_FAILURE(rv)) { 782 goto logit; 783 } 784 785 buf.Pointer = NULL; 786 buf.Length = ACPI_ALLOCATE_BUFFER; 787 rv = AcpiEvaluateObjectTyped(_dep, NULL, NULL, &buf, 788 ACPI_TYPE_PACKAGE); 789 if (ACPI_FAILURE(rv)) { 790 goto logit; 791 } 792 obj = buf.Pointer; 793 794 for (ref = 0; ref < obj->Package.Count; ref++) { 795 ACPI_OBJECT *robj = &obj->Package.Elements[ref]; 796 ACPI_HANDLE rhdl; 797 798 rv = acpi_eval_reference_handle(robj, &rhdl); 799 if (ACPI_FAILURE(rv)) { 800 continue; 801 } 802 803 depad = acpi_match_node(rhdl); 804 if (depad != NULL) { 805 acpi_add_dep(ad, depad); 806 } 807 } 808 809 ACPI_FREE(buf.Pointer); 810 811 logit: 812 if (!SIMPLEQ_EMPTY(&ad->ad_deps)) { 813 struct acpi_devnodedep *dd; 814 815 aprint_debug_dev(sc->sc_dev, "%s dependencies:", 816 ad->ad_name); 817 SIMPLEQ_FOREACH(dd, &ad->ad_deps, dd_list) { 818 aprint_debug(" %s", dd->dd_node->ad_name); 819 } 820 aprint_debug("\n"); 821 } 822 } 823 } 824 825 static void 826 acpi_config_tree(struct acpi_softc *sc) 827 { 828 /* 829 * Assign bus_dma resources 830 */ 831 acpi_config_dma(sc); 832 833 /* 834 * Configure all everything found "at acpi?". 835 */ 836 (void)acpi_rescan(sc->sc_dev, NULL, NULL); 837 838 /* 839 * Update GPE information. 840 * 841 * Note that this must be called after 842 * all GPE handlers have been installed. 843 */ 844 (void)AcpiUpdateAllGpes(); 845 846 /* 847 * Defer rest of the configuration. 848 */ 849 (void)config_defer(sc->sc_dev, acpi_rescan_capabilities); 850 } 851 852 // XXXNH? 853 static void 854 acpi_config_dma(struct acpi_softc *sc) 855 { 856 struct acpi_devnode *ad; 857 858 SIMPLEQ_FOREACH(ad, &sc->sc_head, ad_list) { 859 860 if (ad->ad_device != NULL) 861 continue; 862 863 if (ad->ad_devinfo->Type != ACPI_TYPE_DEVICE) 864 continue; 865 866 ad->ad_dmat = acpi_get_dma_tag(sc, ad); 867 ad->ad_dmat64 = acpi_get_dma64_tag(sc, ad); 868 } 869 } 870 871 static ACPI_STATUS 872 acpi_make_devnode(ACPI_HANDLE handle, uint32_t level, 873 void *context, void **status) 874 { 875 struct acpi_walkcontext *awc = context; 876 struct acpi_softc *sc = awc->aw_sc; 877 struct acpi_devnode *ad; 878 ACPI_DEVICE_INFO *devinfo; 879 ACPI_OBJECT_TYPE type; 880 ACPI_STATUS rv; 881 882 rv = AcpiGetObjectInfo(handle, &devinfo); 883 884 if (ACPI_FAILURE(rv)) 885 return AE_OK; /* Do not terminate the walk. */ 886 887 type = devinfo->Type; 888 889 switch (type) { 890 891 case ACPI_TYPE_DEVICE: 892 acpi_activate_device(handle, &devinfo); 893 /* FALLTHROUGH */ 894 895 case ACPI_TYPE_PROCESSOR: 896 case ACPI_TYPE_THERMAL: 897 case ACPI_TYPE_POWER: 898 899 ad = kmem_zalloc(sizeof(*ad), KM_SLEEP); 900 901 ad->ad_device = NULL; 902 ad->ad_notify = NULL; 903 ad->ad_pciinfo = NULL; 904 ad->ad_wakedev = NULL; 905 906 ad->ad_type = type; 907 ad->ad_handle = handle; 908 ad->ad_devinfo = devinfo; 909 910 ad->ad_root = sc->sc_dev; 911 ad->ad_parent = awc->aw_parent; 912 913 acpi_match_node_init(ad); 914 acpi_make_name(ad, devinfo->Name); 915 916 /* 917 * Identify wake GPEs from the _PRW. Note that 918 * AcpiUpdateAllGpes() must be called afterwards. 919 */ 920 if (ad->ad_devinfo->Type == ACPI_TYPE_DEVICE) 921 acpi_wakedev_init(ad); 922 923 SIMPLEQ_INIT(&ad->ad_child_head); 924 SIMPLEQ_INSERT_TAIL(&sc->sc_head, ad, ad_list); 925 SIMPLEQ_INIT(&ad->ad_deps); 926 927 if (ad->ad_parent != NULL) { 928 929 SIMPLEQ_INSERT_TAIL(&ad->ad_parent->ad_child_head, 930 ad, ad_child_list); 931 } 932 933 awc->aw_parent = ad; 934 break; 935 936 default: 937 ACPI_FREE(devinfo); 938 break; 939 } 940 941 return AE_OK; 942 } 943 944 static ACPI_STATUS 945 acpi_make_devnode_post(ACPI_HANDLE handle, uint32_t level, 946 void *context, void **status) 947 { 948 struct acpi_walkcontext *awc = context; 949 950 KASSERT(awc != NULL); 951 KASSERT(awc->aw_parent != NULL); 952 953 if (handle == awc->aw_parent->ad_handle) 954 awc->aw_parent = awc->aw_parent->ad_parent; 955 956 return AE_OK; 957 } 958 959 static void 960 acpi_make_name(struct acpi_devnode *ad, uint32_t name) 961 { 962 ACPI_NAME_UNION *anu; 963 int clear, i; 964 965 anu = (ACPI_NAME_UNION *)&name; 966 ad->ad_name[4] = '\0'; 967 968 for (i = 3, clear = 0; i >= 0; i--) { 969 970 if (clear == 0 && anu->Ascii[i] == '_') 971 ad->ad_name[i] = '\0'; 972 else { 973 ad->ad_name[i] = anu->Ascii[i]; 974 clear = 1; 975 } 976 } 977 978 if (ad->ad_name[0] == '\0') 979 ad->ad_name[0] = '_'; 980 } 981 982 bus_dma_tag_t 983 acpi_default_dma_tag(struct acpi_softc *sc, struct acpi_devnode *ad) 984 { 985 return sc->sc_dmat; 986 } 987 __weak_alias(acpi_get_dma_tag,acpi_default_dma_tag); 988 989 bus_dma_tag_t 990 acpi_default_dma64_tag(struct acpi_softc *sc, struct acpi_devnode *ad) 991 { 992 return sc->sc_dmat64; 993 } 994 __weak_alias(acpi_get_dma64_tag,acpi_default_dma64_tag); 995 996 pci_chipset_tag_t 997 acpi_default_pci_chipset_tag(struct acpi_softc *sc, int seg, int bbn) 998 { 999 return NULL; 1000 } 1001 __weak_alias(acpi_get_pci_chipset_tag,acpi_default_pci_chipset_tag); 1002 1003 /* 1004 * Device attachment. 1005 */ 1006 static int 1007 acpi_rescan(device_t self, const char *ifattr, const int *locators) 1008 { 1009 struct acpi_softc *sc = device_private(self); 1010 struct acpi_attach_args aa; 1011 1012 /* 1013 * Try to attach hpet(4) first via a specific table. 1014 */ 1015 aa.aa_memt = sc->sc_memt; 1016 1017 if (ifattr_match(ifattr, "acpihpetbus") && sc->sc_hpet == NULL) { 1018 sc->sc_hpet = config_found(sc->sc_dev, &aa, NULL, 1019 CFARGS(.iattr = "acpihpetbus")); 1020 } 1021 1022 /* 1023 * A two-pass scan for acpinodebus. 1024 */ 1025 if (ifattr_match(ifattr, "acpinodebus")) { 1026 acpi_rescan_early(sc); 1027 acpi_rescan_nodes(sc); 1028 } 1029 1030 /* 1031 * Attach APM emulation and acpiwdrt(4). 1032 */ 1033 if (ifattr_match(ifattr, "acpiapmbus") && sc->sc_apmbus == NULL) { 1034 sc->sc_apmbus = config_found(sc->sc_dev, NULL, NULL, 1035 CFARGS(.iattr = "acpiapmbus")); 1036 } 1037 1038 if (ifattr_match(ifattr, "acpiwdrtbus") && sc->sc_wdrt == NULL) { 1039 sc->sc_wdrt = config_found(sc->sc_dev, NULL, NULL, 1040 CFARGS(.iattr = "acpiwdrtbus")); 1041 } 1042 1043 if (ifattr_match(ifattr, "apeibus") && sc->sc_apei == NULL) { 1044 sc->sc_apei = config_found(sc->sc_dev, NULL, NULL, 1045 CFARGS(.iattr = "apeibus")); 1046 } 1047 1048 return 0; 1049 } 1050 1051 static void 1052 acpi_rescan_node(struct acpi_softc *sc, struct acpi_devnode *ad) 1053 { 1054 const char * const hpet_ids[] = { "PNP0103", NULL }; 1055 struct acpi_attach_args aa; 1056 struct acpi_devnodedep *dd; 1057 ACPI_DEVICE_INFO *di = ad->ad_devinfo; 1058 1059 if (ad->ad_scanned || ad->ad_device != NULL) { 1060 return; 1061 } 1062 1063 /* 1064 * Mark as scanned before checking dependencies to 1065 * break out of dependency cycles. 1066 */ 1067 ad->ad_scanned = true; 1068 1069 if (!acpi_device_present(ad->ad_handle)) { 1070 return; 1071 } 1072 1073 if (acpi_match_hid(di, acpi_ignored_ids) != 0) { 1074 return; 1075 } 1076 1077 if (acpi_match_hid(di, hpet_ids) != 0 && sc->sc_hpet != NULL) { 1078 return; 1079 } 1080 1081 /* Rescan dependencies first. */ 1082 SIMPLEQ_FOREACH(dd, &ad->ad_deps, dd_list) { 1083 if (!dd->dd_node->ad_scanned) { 1084 acpi_rescan_node(sc, dd->dd_node); 1085 } 1086 } 1087 1088 /* Dependency scanning may have claimed this device. */ 1089 if (ad->ad_device != NULL) { 1090 return; 1091 } 1092 1093 aa.aa_node = ad; 1094 aa.aa_iot = sc->sc_iot; 1095 aa.aa_memt = sc->sc_memt; 1096 if (ad->ad_pciinfo != NULL) { 1097 aa.aa_pc = ad->ad_pciinfo->ap_pc; 1098 aa.aa_pciflags = sc->sc_pciflags; 1099 } 1100 aa.aa_ic = sc->sc_ic; 1101 aa.aa_dmat = ad->ad_dmat; 1102 aa.aa_dmat64 = ad->ad_dmat64; 1103 1104 ad->ad_device = config_found(sc->sc_dev, &aa, acpi_print, 1105 CFARGS(.iattr = "acpinodebus", 1106 .devhandle = devhandle_from_acpi(devhandle_invalid(), 1107 ad->ad_handle))); 1108 } 1109 1110 static void 1111 acpi_rescan_early(struct acpi_softc *sc) 1112 { 1113 struct acpi_devnode *ad; 1114 1115 /* 1116 * First scan for devices such as acpiec(4) that 1117 * should be always attached before anything else. 1118 * We want these devices to attach regardless of 1119 * the device status and other restrictions. 1120 */ 1121 SIMPLEQ_FOREACH(ad, &sc->sc_head, ad_list) { 1122 1123 if (ad->ad_device != NULL) 1124 continue; 1125 1126 if (ad->ad_devinfo->Type != ACPI_TYPE_DEVICE) 1127 continue; 1128 1129 if (acpi_match_hid(ad->ad_devinfo, acpi_early_ids) == 0) 1130 continue; 1131 1132 KASSERT(ad->ad_handle != NULL); 1133 1134 acpi_rescan_node(sc, ad); 1135 } 1136 } 1137 1138 static void 1139 acpi_rescan_nodes(struct acpi_softc *sc) 1140 { 1141 struct acpi_devnode *ad; 1142 ACPI_DEVICE_INFO *di; 1143 1144 /* Reset scan state. */ 1145 SIMPLEQ_FOREACH(ad, &sc->sc_head, ad_list) { 1146 ad->ad_scanned = false; 1147 } 1148 1149 SIMPLEQ_FOREACH(ad, &sc->sc_head, ad_list) { 1150 1151 if (ad->ad_device != NULL) 1152 continue; 1153 1154 /* 1155 * There is a bug in ACPICA: it defines the type 1156 * of the scopes incorrectly for its own reasons. 1157 */ 1158 if (acpi_is_scope(ad) != false) 1159 continue; 1160 1161 di = ad->ad_devinfo; 1162 1163 /* 1164 * We only attach devices which are present, enabled, and 1165 * functioning properly. However, if a device is enabled, 1166 * it is decoding resources and we should claim these, 1167 * if possible. This requires changes to bus_space(9). 1168 */ 1169 if (di->Type == ACPI_TYPE_DEVICE && 1170 !acpi_device_present(ad->ad_handle)) { 1171 continue; 1172 } 1173 1174 if (di->Type == ACPI_TYPE_POWER) 1175 continue; 1176 1177 if (di->Type == ACPI_TYPE_PROCESSOR) 1178 continue; 1179 1180 if (acpi_match_hid(di, acpi_early_ids) != 0) 1181 continue; 1182 1183 KASSERT(ad->ad_handle != NULL); 1184 1185 acpi_rescan_node(sc, ad); 1186 } 1187 } 1188 1189 static void 1190 acpi_rescan_capabilities(device_t self) 1191 { 1192 struct acpi_softc *sc = device_private(self); 1193 struct acpi_devnode *ad; 1194 ACPI_HANDLE tmp; 1195 ACPI_STATUS rv; 1196 1197 SIMPLEQ_FOREACH(ad, &sc->sc_head, ad_list) { 1198 1199 if (ad->ad_devinfo->Type != ACPI_TYPE_DEVICE) 1200 continue; 1201 1202 /* 1203 * Scan power resource capabilities. 1204 * 1205 * If any power states are supported, 1206 * at least _PR0 and _PR3 must be present. 1207 */ 1208 rv = AcpiGetHandle(ad->ad_handle, "_PR0", &tmp); 1209 1210 if (ACPI_SUCCESS(rv)) { 1211 ad->ad_flags |= ACPI_DEVICE_POWER; 1212 acpi_power_add(ad); 1213 } 1214 1215 /* 1216 * Scan wake-up capabilities. 1217 */ 1218 if (ad->ad_wakedev != NULL) { 1219 ad->ad_flags |= ACPI_DEVICE_WAKEUP; 1220 acpi_wakedev_add(ad); 1221 } 1222 1223 /* 1224 * Scan docking stations. 1225 */ 1226 rv = AcpiGetHandle(ad->ad_handle, "_DCK", &tmp); 1227 1228 if (ACPI_SUCCESS(rv)) 1229 ad->ad_flags |= ACPI_DEVICE_DOCK; 1230 1231 /* 1232 * Scan devices that are ejectable. 1233 */ 1234 rv = AcpiGetHandle(ad->ad_handle, "_EJ0", &tmp); 1235 1236 if (ACPI_SUCCESS(rv)) 1237 ad->ad_flags |= ACPI_DEVICE_EJECT; 1238 } 1239 } 1240 1241 static int 1242 acpi_print(void *aux, const char *pnp) 1243 { 1244 struct acpi_attach_args *aa = aux; 1245 struct acpi_devnode *ad; 1246 const char *hid, *uid; 1247 ACPI_DEVICE_INFO *di; 1248 1249 ad = aa->aa_node; 1250 di = ad->ad_devinfo; 1251 1252 hid = di->HardwareId.String; 1253 uid = di->UniqueId.String; 1254 1255 if (pnp != NULL) { 1256 1257 if (di->Type != ACPI_TYPE_DEVICE) { 1258 1259 aprint_normal("%s (ACPI Object Type '%s') at %s", 1260 ad->ad_name, AcpiUtGetTypeName(ad->ad_type), pnp); 1261 1262 return UNCONF; 1263 } 1264 1265 if ((di->Valid & ACPI_VALID_HID) == 0 || hid == NULL) 1266 return 0; 1267 1268 aprint_normal("%s (%s) ", ad->ad_name, hid); 1269 acpi_print_dev(hid); 1270 aprint_normal("at %s", pnp); 1271 1272 return UNCONF; 1273 } 1274 1275 aprint_normal(" (%s", ad->ad_name); 1276 1277 if ((di->Valid & ACPI_VALID_HID) != 0 && hid != NULL) { 1278 1279 aprint_normal(", %s", hid); 1280 1281 if ((di->Valid & ACPI_VALID_UID) != 0 && uid != NULL) { 1282 1283 if (uid[0] == '\0') 1284 uid = "<null>"; 1285 1286 aprint_normal("-%s", uid); 1287 } 1288 } 1289 1290 aprint_normal(")"); 1291 1292 return UNCONF; 1293 } 1294 1295 /* 1296 * Notify. 1297 */ 1298 static void 1299 acpi_notify_handler(ACPI_HANDLE handle, uint32_t event, void *aux) 1300 { 1301 struct acpi_softc *sc = acpi_softc; 1302 struct acpi_devnode *ad; 1303 ACPI_NOTIFY_HANDLER notify; 1304 1305 KASSERT(sc != NULL); 1306 KASSERT(aux == NULL); 1307 KASSERT(acpi_active != 0); 1308 1309 if (acpi_suspended != 0) 1310 return; 1311 1312 /* 1313 * System: 0x00 - 0x7F. 1314 * Device: 0x80 - 0xFF. 1315 */ 1316 switch (event) { 1317 1318 case ACPI_NOTIFY_BUS_CHECK: 1319 case ACPI_NOTIFY_DEVICE_CHECK: 1320 case ACPI_NOTIFY_DEVICE_WAKE: 1321 case ACPI_NOTIFY_EJECT_REQUEST: 1322 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: 1323 case ACPI_NOTIFY_FREQUENCY_MISMATCH: 1324 case ACPI_NOTIFY_BUS_MODE_MISMATCH: 1325 case ACPI_NOTIFY_POWER_FAULT: 1326 case ACPI_NOTIFY_CAPABILITIES_CHECK: 1327 case ACPI_NOTIFY_DEVICE_PLD_CHECK: 1328 case ACPI_NOTIFY_RESERVED: 1329 case ACPI_NOTIFY_LOCALITY_UPDATE: 1330 break; 1331 } 1332 1333 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "notification 0x%02X for " 1334 "%s (%p)\n", event, acpi_name(handle), handle)); 1335 1336 /* 1337 * We deliver notifications only to drivers 1338 * that have been successfully attached and 1339 * that have registered a handler with us. 1340 * The opaque pointer is always the device_t. 1341 */ 1342 SIMPLEQ_FOREACH(ad, &sc->sc_head, ad_list) { 1343 1344 if (ad->ad_device == NULL) 1345 continue; 1346 1347 if ((notify = atomic_load_acquire(&ad->ad_notify)) == NULL) 1348 continue; 1349 1350 if (ad->ad_handle != handle) 1351 continue; 1352 1353 (*notify)(ad->ad_handle, event, ad->ad_device); 1354 1355 return; 1356 } 1357 1358 aprint_debug_dev(sc->sc_dev, "unhandled notify 0x%02X " 1359 "for %s (%p)\n", event, acpi_name(handle), handle); 1360 } 1361 1362 bool 1363 acpi_register_notify(struct acpi_devnode *ad, ACPI_NOTIFY_HANDLER notify) 1364 { 1365 struct acpi_softc *sc = acpi_softc; 1366 1367 KASSERT(sc != NULL); 1368 KASSERT(acpi_active != 0); 1369 1370 if (acpi_suspended != 0) 1371 goto fail; 1372 1373 if (ad == NULL || notify == NULL) 1374 goto fail; 1375 1376 KASSERTMSG(ad->ad_notify == NULL, 1377 "%s: ACPI node %s already has notify handler: %p", 1378 ad->ad_device ? device_xname(ad->ad_device) : "(unknown)", 1379 ad->ad_name, 1380 ad->ad_notify); 1381 atomic_store_release(&ad->ad_notify, notify); 1382 1383 return true; 1384 1385 fail: 1386 if (!ad) 1387 aprint_error_dev(sc->sc_dev, "failed to initialize ACPI\n"); 1388 else 1389 aprint_error_dev(sc->sc_dev, "failed to register notify " 1390 "handler for %s (%p)\n", ad->ad_name, ad->ad_handle); 1391 1392 return false; 1393 } 1394 1395 void 1396 acpi_deregister_notify(struct acpi_devnode *ad) 1397 { 1398 1399 atomic_store_relaxed(&ad->ad_notify, NULL); 1400 1401 /* Wait for any in-flight calls to the notifier to complete. */ 1402 AcpiOsWaitEventsComplete(); 1403 } 1404 1405 /* 1406 * Fixed buttons. 1407 */ 1408 static void 1409 acpi_register_fixed_button(struct acpi_softc *sc, int event) 1410 { 1411 struct sysmon_pswitch *smpsw; 1412 ACPI_STATUS rv; 1413 int type; 1414 1415 switch (event) { 1416 1417 case ACPI_EVENT_POWER_BUTTON: 1418 1419 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) != 0) 1420 return; 1421 1422 type = PSWITCH_TYPE_POWER; 1423 smpsw = &sc->sc_smpsw_power; 1424 break; 1425 1426 case ACPI_EVENT_SLEEP_BUTTON: 1427 1428 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) != 0) 1429 return; 1430 1431 type = PSWITCH_TYPE_SLEEP; 1432 smpsw = &sc->sc_smpsw_sleep; 1433 break; 1434 1435 default: 1436 rv = AE_TYPE; 1437 goto fail; 1438 } 1439 1440 smpsw->smpsw_type = type; 1441 smpsw->smpsw_name = device_xname(sc->sc_dev); 1442 1443 if (sysmon_pswitch_register(smpsw) != 0) { 1444 rv = AE_ERROR; 1445 goto fail; 1446 } 1447 1448 AcpiClearEvent(event); 1449 1450 rv = AcpiInstallFixedEventHandler(event, 1451 acpi_fixed_button_handler, smpsw); 1452 1453 if (ACPI_FAILURE(rv)) { 1454 sysmon_pswitch_unregister(smpsw); 1455 goto fail; 1456 } 1457 1458 aprint_normal_dev(sc->sc_dev, "fixed %s button present\n", 1459 (type != PSWITCH_TYPE_SLEEP) ? "power" : "sleep"); 1460 1461 return; 1462 1463 fail: 1464 aprint_error_dev(sc->sc_dev, "failed to register " 1465 "fixed event %d: %s\n", event, AcpiFormatException(rv)); 1466 } 1467 1468 static void 1469 acpi_deregister_fixed_button(struct acpi_softc *sc, int event) 1470 { 1471 struct sysmon_pswitch *smpsw; 1472 ACPI_STATUS rv; 1473 1474 switch (event) { 1475 1476 case ACPI_EVENT_POWER_BUTTON: 1477 smpsw = &sc->sc_smpsw_power; 1478 1479 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) != 0) { 1480 KASSERT(smpsw->smpsw_type != PSWITCH_TYPE_POWER); 1481 return; 1482 } 1483 1484 break; 1485 1486 case ACPI_EVENT_SLEEP_BUTTON: 1487 smpsw = &sc->sc_smpsw_sleep; 1488 1489 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) != 0) { 1490 KASSERT(smpsw->smpsw_type != PSWITCH_TYPE_SLEEP); 1491 return; 1492 } 1493 1494 break; 1495 1496 default: 1497 rv = AE_TYPE; 1498 goto fail; 1499 } 1500 1501 rv = AcpiRemoveFixedEventHandler(event, acpi_fixed_button_handler); 1502 1503 if (ACPI_SUCCESS(rv)) { 1504 sysmon_pswitch_unregister(smpsw); 1505 return; 1506 } 1507 1508 fail: 1509 aprint_error_dev(sc->sc_dev, "failed to deregister " 1510 "fixed event: %s\n", AcpiFormatException(rv)); 1511 } 1512 1513 static uint32_t 1514 acpi_fixed_button_handler(void *context) 1515 { 1516 static const int handler = OSL_NOTIFY_HANDLER; 1517 struct sysmon_pswitch *smpsw = context; 1518 1519 (void)AcpiOsExecute(handler, acpi_fixed_button_pressed, smpsw); 1520 1521 return ACPI_INTERRUPT_HANDLED; 1522 } 1523 1524 static void 1525 acpi_fixed_button_pressed(void *context) 1526 { 1527 struct sysmon_pswitch *smpsw = context; 1528 1529 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s fixed button pressed\n", 1530 (smpsw->smpsw_type != ACPI_EVENT_SLEEP_BUTTON) ? 1531 "power" : "sleep")); 1532 1533 sysmon_pswitch_event(smpsw, PSWITCH_EVENT_PRESSED); 1534 } 1535 1536 /* 1537 * Sleep. 1538 */ 1539 static void 1540 acpi_sleep_init(struct acpi_softc *sc) 1541 { 1542 uint8_t a, b, i; 1543 ACPI_STATUS rv; 1544 1545 CTASSERT(ACPI_STATE_S0 == 0 && ACPI_STATE_S1 == 1); 1546 CTASSERT(ACPI_STATE_S2 == 2 && ACPI_STATE_S3 == 3); 1547 CTASSERT(ACPI_STATE_S4 == 4 && ACPI_STATE_S5 == 5); 1548 1549 /* 1550 * Evaluate supported sleep states. 1551 */ 1552 for (i = ACPI_STATE_S0; i <= ACPI_STATE_S5; i++) { 1553 1554 rv = AcpiGetSleepTypeData(i, &a, &b); 1555 1556 if (ACPI_SUCCESS(rv)) 1557 sc->sc_sleepstates |= __BIT(i); 1558 } 1559 } 1560 1561 /* 1562 * Must be called with interrupts enabled. 1563 */ 1564 void 1565 acpi_enter_sleep_state(int state) 1566 { 1567 struct acpi_softc *sc = acpi_softc; 1568 ACPI_STATUS rv; 1569 1570 if (acpi_softc == NULL) 1571 return; 1572 1573 if (state == sc->sc_sleepstate) 1574 return; 1575 1576 if (state < ACPI_STATE_S0 || state > ACPI_STATE_S5) 1577 return; 1578 1579 aprint_normal_dev(sc->sc_dev, "entering state S%d\n", state); 1580 1581 switch (state) { 1582 1583 case ACPI_STATE_S0: 1584 sc->sc_sleepstate = ACPI_STATE_S0; 1585 return; 1586 1587 case ACPI_STATE_S1: 1588 case ACPI_STATE_S2: 1589 case ACPI_STATE_S3: 1590 case ACPI_STATE_S4: 1591 1592 if ((sc->sc_sleepstates & __BIT(state)) == 0) { 1593 aprint_error_dev(sc->sc_dev, "sleep state " 1594 "S%d is not available\n", state); 1595 return; 1596 } 1597 1598 /* 1599 * Evaluate the _TTS method. This should be done before 1600 * pmf_system_suspend(9) and the evaluation of _PTS. 1601 * We should also re-evaluate this once we return to 1602 * S0 or if we abort the sleep state transition in the 1603 * middle (see ACPI 3.0, section 7.3.6). In reality, 1604 * however, the _TTS method is seldom seen in the field. 1605 */ 1606 rv = acpi_eval_set_integer(NULL, "\\_TTS", state); 1607 1608 if (ACPI_SUCCESS(rv)) 1609 aprint_debug_dev(sc->sc_dev, "evaluated _TTS\n"); 1610 1611 if (state != ACPI_STATE_S1 && 1612 pmf_system_suspend(PMF_Q_NONE) != true) { 1613 aprint_error_dev(sc->sc_dev, "aborting suspend\n"); 1614 break; 1615 } 1616 1617 /* 1618 * This will evaluate the _PTS and _SST methods, 1619 * but unlike the documentation claims, not _GTS, 1620 * which is evaluated in AcpiEnterSleepState(). 1621 * This must be called with interrupts enabled. 1622 */ 1623 rv = AcpiEnterSleepStatePrep(state); 1624 1625 if (ACPI_FAILURE(rv)) { 1626 aprint_error_dev(sc->sc_dev, "failed to prepare " 1627 "S%d: %s\n", state, AcpiFormatException(rv)); 1628 break; 1629 } 1630 1631 /* 1632 * After the _PTS method has been evaluated, we can 1633 * enable wake and evaluate _PSW (ACPI 4.0, p. 284). 1634 */ 1635 acpi_wakedev_commit(sc, state); 1636 1637 sc->sc_sleepstate = state; 1638 1639 if (state == ACPI_STATE_S1) { 1640 1641 /* 1642 * Before the transition to S1, CPU caches 1643 * must be flushed (see ACPI 4.0, 7.3.4.2). 1644 * 1645 * Note that interrupts must be off before 1646 * calling AcpiEnterSleepState(). Conversely, 1647 * AcpiLeaveSleepState() should always be 1648 * called with interrupts enabled. 1649 */ 1650 acpi_md_OsDisableInterrupt(); 1651 1652 ACPI_FLUSH_CPU_CACHE(); 1653 rv = AcpiEnterSleepState(state); 1654 1655 if (ACPI_FAILURE(rv)) 1656 aprint_error_dev(sc->sc_dev, "failed to " 1657 "enter S1: %s\n", AcpiFormatException(rv)); 1658 1659 /* 1660 * Clear fixed events and disable all GPEs before 1661 * interrupts are enabled. 1662 */ 1663 AcpiClearEvent(ACPI_EVENT_PMTIMER); 1664 AcpiClearEvent(ACPI_EVENT_GLOBAL); 1665 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1666 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1667 AcpiClearEvent(ACPI_EVENT_RTC); 1668 #if (!ACPI_REDUCED_HARDWARE) 1669 AcpiHwDisableAllGpes(); 1670 #endif 1671 1672 acpi_md_OsEnableInterrupt(); 1673 rv = AcpiLeaveSleepState(state); 1674 1675 } else { 1676 1677 (void)acpi_md_sleep(state); 1678 1679 if (state == ACPI_STATE_S4) 1680 AcpiEnable(); 1681 1682 (void)pmf_system_bus_resume(PMF_Q_NONE); 1683 (void)AcpiLeaveSleepState(state); 1684 #if (!ACPI_REDUCED_HARDWARE) 1685 (void)AcpiSetFirmwareWakingVector(0, 0); 1686 #endif 1687 (void)pmf_system_resume(PMF_Q_NONE); 1688 } 1689 1690 /* 1691 * No wake GPEs should be enabled at runtime. 1692 */ 1693 acpi_wakedev_commit(sc, ACPI_STATE_S0); 1694 break; 1695 1696 case ACPI_STATE_S5: 1697 1698 (void)acpi_eval_set_integer(NULL, "\\_TTS", ACPI_STATE_S5); 1699 1700 rv = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1701 1702 if (ACPI_FAILURE(rv)) { 1703 aprint_error_dev(sc->sc_dev, "failed to prepare " 1704 "S%d: %s\n", state, AcpiFormatException(rv)); 1705 break; 1706 } 1707 1708 (void)AcpiDisableAllGpes(); 1709 1710 DELAY(1000000); 1711 1712 sc->sc_sleepstate = state; 1713 acpi_md_OsDisableInterrupt(); 1714 1715 (void)AcpiEnterSleepState(ACPI_STATE_S5); 1716 1717 aprint_error_dev(sc->sc_dev, "WARNING: powerdown failed!\n"); 1718 1719 break; 1720 } 1721 1722 sc->sc_sleepstate = ACPI_STATE_S0; 1723 1724 (void)acpi_eval_set_integer(NULL, "\\_TTS", ACPI_STATE_S0); 1725 } 1726 1727 /* 1728 * Sysctl. 1729 */ 1730 SYSCTL_SETUP(sysctl_acpi_setup, "sysctl hw.acpi subtree setup") 1731 { 1732 const struct sysctlnode *rnode, *snode; 1733 int err; 1734 1735 err = sysctl_createv(clog, 0, NULL, &rnode, 1736 CTLFLAG_PERMANENT, CTLTYPE_NODE, 1737 "acpi", SYSCTL_DESCR("ACPI subsystem parameters"), 1738 NULL, 0, NULL, 0, 1739 CTL_HW, CTL_CREATE, CTL_EOL); 1740 1741 if (err != 0) 1742 return; 1743 1744 (void)sysctl_createv(NULL, 0, &rnode, NULL, 1745 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD, 1746 "root", SYSCTL_DESCR("ACPI root pointer"), 1747 NULL, 0, &acpi_root_pointer, sizeof(acpi_root_pointer), 1748 CTL_CREATE, CTL_EOL); 1749 1750 err = sysctl_createv(clog, 0, &rnode, &snode, 1751 CTLFLAG_PERMANENT, CTLTYPE_NODE, 1752 "sleep", SYSCTL_DESCR("ACPI sleep"), 1753 NULL, 0, NULL, 0, 1754 CTL_CREATE, CTL_EOL); 1755 1756 if (err != 0) 1757 return; 1758 1759 (void)sysctl_createv(NULL, 0, &snode, NULL, 1760 CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT, 1761 "state", SYSCTL_DESCR("System sleep state"), 1762 sysctl_hw_acpi_sleepstate, 0, NULL, 0, 1763 CTL_CREATE, CTL_EOL); 1764 1765 (void)sysctl_createv(NULL, 0, &snode, NULL, 1766 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_STRING, 1767 "states", SYSCTL_DESCR("Supported sleep states"), 1768 sysctl_hw_acpi_sleepstates, 0, NULL, 0, 1769 CTL_CREATE, CTL_EOL); 1770 1771 err = sysctl_createv(clog, 0, &rnode, &rnode, 1772 CTLFLAG_PERMANENT, CTLTYPE_NODE, 1773 "stat", SYSCTL_DESCR("ACPI statistics"), 1774 NULL, 0, NULL, 0, 1775 CTL_CREATE, CTL_EOL); 1776 1777 if (err != 0) 1778 return; 1779 1780 (void)sysctl_createv(clog, 0, &rnode, NULL, 1781 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD, 1782 "gpe", SYSCTL_DESCR("Number of dispatched GPEs"), 1783 NULL, 0, &AcpiGpeCount, sizeof(AcpiGpeCount), 1784 CTL_CREATE, CTL_EOL); 1785 1786 (void)sysctl_createv(clog, 0, &rnode, NULL, 1787 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD, 1788 "sci", SYSCTL_DESCR("Number of SCI interrupts"), 1789 NULL, 0, &AcpiSciCount, sizeof(AcpiSciCount), 1790 CTL_CREATE, CTL_EOL); 1791 1792 (void)sysctl_createv(clog, 0, &rnode, NULL, 1793 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD, 1794 "fixed", SYSCTL_DESCR("Number of fixed events"), 1795 sysctl_hw_acpi_fixedstats, 0, NULL, 0, 1796 CTL_CREATE, CTL_EOL); 1797 1798 (void)sysctl_createv(clog, 0, &rnode, NULL, 1799 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD, 1800 "method", SYSCTL_DESCR("Number of methods executed"), 1801 NULL, 0, &AcpiMethodCount, sizeof(AcpiMethodCount), 1802 CTL_CREATE, CTL_EOL); 1803 1804 CTASSERT(sizeof(AcpiGpeCount) == sizeof(uint64_t)); 1805 CTASSERT(sizeof(AcpiSciCount) == sizeof(uint64_t)); 1806 } 1807 1808 static int 1809 sysctl_hw_acpi_fixedstats(SYSCTLFN_ARGS) 1810 { 1811 struct sysctlnode node; 1812 uint64_t t; 1813 int err, i; 1814 1815 for (i = t = 0; i < __arraycount(AcpiFixedEventCount); i++) 1816 t += AcpiFixedEventCount[i]; 1817 1818 node = *rnode; 1819 node.sysctl_data = &t; 1820 1821 err = sysctl_lookup(SYSCTLFN_CALL(&node)); 1822 1823 if (err || newp == NULL) 1824 return err; 1825 1826 return 0; 1827 } 1828 1829 static int 1830 sysctl_hw_acpi_sleepstate(SYSCTLFN_ARGS) 1831 { 1832 struct acpi_softc *sc = acpi_softc; 1833 struct sysctlnode node; 1834 int err, t; 1835 1836 if (acpi_softc == NULL) 1837 return ENOSYS; 1838 1839 node = *rnode; 1840 t = sc->sc_sleepstate; 1841 node.sysctl_data = &t; 1842 1843 err = sysctl_lookup(SYSCTLFN_CALL(&node)); 1844 1845 if (err || newp == NULL) 1846 return err; 1847 1848 if (t < ACPI_STATE_S0 || t > ACPI_STATE_S5) 1849 return EINVAL; 1850 1851 acpi_enter_sleep_state(t); 1852 1853 return 0; 1854 } 1855 1856 static int 1857 sysctl_hw_acpi_sleepstates(SYSCTLFN_ARGS) 1858 { 1859 struct acpi_softc *sc = acpi_softc; 1860 struct sysctlnode node; 1861 char t[3 * 6 + 1]; 1862 int err; 1863 1864 if (acpi_softc == NULL) 1865 return ENOSYS; 1866 1867 (void)memset(t, '\0', sizeof(t)); 1868 1869 (void)snprintf(t, sizeof(t), "%s%s%s%s%s%s", 1870 ((sc->sc_sleepstates & __BIT(0)) != 0) ? "S0 " : "", 1871 ((sc->sc_sleepstates & __BIT(1)) != 0) ? "S1 " : "", 1872 ((sc->sc_sleepstates & __BIT(2)) != 0) ? "S2 " : "", 1873 ((sc->sc_sleepstates & __BIT(3)) != 0) ? "S3 " : "", 1874 ((sc->sc_sleepstates & __BIT(4)) != 0) ? "S4 " : "", 1875 ((sc->sc_sleepstates & __BIT(5)) != 0) ? "S5 " : ""); 1876 1877 node = *rnode; 1878 node.sysctl_data = &t; 1879 1880 err = sysctl_lookup(SYSCTLFN_CALL(&node)); 1881 1882 if (err || newp == NULL) 1883 return err; 1884 1885 return 0; 1886 } 1887 1888 /* 1889 * Tables. 1890 */ 1891 ACPI_PHYSICAL_ADDRESS 1892 acpi_OsGetRootPointer(void) 1893 { 1894 ACPI_PHYSICAL_ADDRESS PhysicalAddress; 1895 1896 /* 1897 * We let MD code handle this since there are multiple ways to do it: 1898 * 1899 * IA-32: Use AcpiFindRootPointer() to locate the RSDP. 1900 * 1901 * IA-64: Use the EFI. 1902 */ 1903 PhysicalAddress = acpi_md_OsGetRootPointer(); 1904 1905 if (acpi_root_pointer == 0) 1906 acpi_root_pointer = PhysicalAddress; 1907 1908 return PhysicalAddress; 1909 } 1910 1911 static ACPI_TABLE_HEADER * 1912 acpi_map_rsdt(void) 1913 { 1914 ACPI_PHYSICAL_ADDRESS paddr; 1915 ACPI_TABLE_RSDP *rsdp; 1916 1917 paddr = AcpiOsGetRootPointer(); 1918 1919 if (paddr == 0) 1920 return NULL; 1921 1922 rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP)); 1923 1924 if (rsdp == NULL) 1925 return NULL; 1926 1927 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress) 1928 paddr = rsdp->XsdtPhysicalAddress; 1929 else 1930 paddr = rsdp->RsdtPhysicalAddress; 1931 1932 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 1933 1934 return AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER)); 1935 } 1936 1937 /* 1938 * XXX: Refactor to be a generic function that unmaps tables. 1939 */ 1940 static void 1941 acpi_unmap_rsdt(ACPI_TABLE_HEADER *rsdt) 1942 { 1943 1944 if (rsdt == NULL) 1945 return; 1946 1947 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 1948 } 1949 1950 /* 1951 * XXX: Refactor to be a generic function that maps tables. 1952 */ 1953 ACPI_STATUS 1954 acpi_madt_map(void) 1955 { 1956 ACPI_STATUS rv; 1957 1958 if (madt_header != NULL) 1959 return AE_ALREADY_EXISTS; 1960 1961 rv = AcpiGetTable(ACPI_SIG_MADT, 1, &madt_header); 1962 1963 if (ACPI_FAILURE(rv)) 1964 return rv; 1965 1966 return AE_OK; 1967 } 1968 1969 void 1970 acpi_madt_unmap(void) 1971 { 1972 madt_header = NULL; 1973 } 1974 1975 ACPI_STATUS 1976 acpi_gtdt_map(void) 1977 { 1978 ACPI_STATUS rv; 1979 1980 if (gtdt_header != NULL) 1981 return AE_ALREADY_EXISTS; 1982 1983 rv = AcpiGetTable(ACPI_SIG_GTDT, 1, >dt_header); 1984 1985 if (ACPI_FAILURE(rv)) 1986 return rv; 1987 1988 return AE_OK; 1989 } 1990 1991 void 1992 acpi_gtdt_unmap(void) 1993 { 1994 gtdt_header = NULL; 1995 } 1996 1997 /* 1998 * XXX: Refactor to be a generic function that walks tables. 1999 */ 2000 void 2001 acpi_madt_walk(ACPI_STATUS (*func)(ACPI_SUBTABLE_HEADER *, void *), void *aux) 2002 { 2003 ACPI_SUBTABLE_HEADER *hdrp; 2004 char *madtend, *where; 2005 2006 madtend = (char *)madt_header + madt_header->Length; 2007 where = (char *)madt_header + sizeof (ACPI_TABLE_MADT); 2008 2009 while (where < madtend) { 2010 2011 hdrp = (ACPI_SUBTABLE_HEADER *)where; 2012 2013 if (hdrp->Length == 0 || ACPI_FAILURE(func(hdrp, aux))) 2014 break; 2015 2016 where += hdrp->Length; 2017 } 2018 } 2019 2020 void 2021 acpi_gtdt_walk(ACPI_STATUS (*func)(ACPI_GTDT_HEADER *, void *), void *aux) 2022 { 2023 ACPI_GTDT_HEADER *hdrp; 2024 char *gtdtend, *where; 2025 2026 gtdtend = (char *)gtdt_header + gtdt_header->Length; 2027 where = (char *)gtdt_header + sizeof (ACPI_TABLE_GTDT); 2028 2029 while (where < gtdtend) { 2030 2031 hdrp = (ACPI_GTDT_HEADER *)where; 2032 2033 if (hdrp->Length == 0 || ACPI_FAILURE(func(hdrp, aux))) 2034 break; 2035 2036 where += hdrp->Length; 2037 } 2038 } 2039 2040 /* 2041 * Miscellaneous. 2042 */ 2043 static bool 2044 acpi_is_scope(struct acpi_devnode *ad) 2045 { 2046 int i; 2047 2048 /* 2049 * Return true if the node is a root scope. 2050 */ 2051 if (ad->ad_parent == NULL) 2052 return false; 2053 2054 if (ad->ad_parent->ad_handle != ACPI_ROOT_OBJECT) 2055 return false; 2056 2057 for (i = 0; i < __arraycount(acpi_scopes); i++) { 2058 2059 if (acpi_scopes[i] == NULL) 2060 continue; 2061 2062 if (ad->ad_handle == acpi_scopes[i]) 2063 return true; 2064 } 2065 2066 return false; 2067 } 2068 2069 bool 2070 acpi_device_present(ACPI_HANDLE handle) 2071 { 2072 ACPI_STATUS rv; 2073 ACPI_INTEGER sta; 2074 2075 rv = acpi_eval_integer(handle, "_STA", &sta); 2076 2077 if (ACPI_FAILURE(rv)) { 2078 /* No _STA method -> must be there */ 2079 return rv == AE_NOT_FOUND; 2080 } 2081 2082 return (sta & ACPI_STA_OK) == ACPI_STA_OK; 2083 } 2084 2085 /* 2086 * ACPIVERBOSE. 2087 */ 2088 void 2089 acpi_load_verbose(void) 2090 { 2091 2092 if (acpi_verbose_loaded == 0) 2093 module_autoload("acpiverbose", MODULE_CLASS_MISC); 2094 } 2095 2096 void 2097 acpi_print_verbose_stub(struct acpi_softc *sc) 2098 { 2099 2100 acpi_load_verbose(); 2101 2102 if (acpi_verbose_loaded != 0) 2103 acpi_print_verbose(sc); 2104 } 2105 2106 void 2107 acpi_print_dev_stub(const char *pnpstr) 2108 { 2109 2110 acpi_load_verbose(); 2111 2112 if (acpi_verbose_loaded != 0) 2113 acpi_print_dev(pnpstr); 2114 } 2115 2116 MALLOC_DECLARE(M_ACPI); /* XXX: ACPI_ACTIVATE_DEV should use kmem(9). */ 2117 2118 /* 2119 * ACPI_ACTIVATE_DEV. 2120 */ 2121 static void 2122 acpi_activate_device(ACPI_HANDLE handle, ACPI_DEVICE_INFO **di) 2123 { 2124 2125 #ifndef ACPI_ACTIVATE_DEV 2126 return; 2127 } 2128 #else 2129 static const int valid = ACPI_VALID_HID; 2130 ACPI_DEVICE_INFO *newdi; 2131 ACPI_STATUS rv; 2132 2133 2134 /* 2135 * If the device is valid and present, 2136 * but not enabled, try to activate it. 2137 */ 2138 if (((*di)->Valid & valid) != valid) 2139 return; 2140 2141 if (!acpi_device_present(handle)) 2142 return; 2143 2144 rv = acpi_allocate_resources(handle); 2145 2146 if (ACPI_FAILURE(rv)) 2147 goto fail; 2148 2149 rv = AcpiGetObjectInfo(handle, &newdi); 2150 2151 if (ACPI_FAILURE(rv)) 2152 goto fail; 2153 2154 ACPI_FREE(*di); 2155 *di = newdi; 2156 2157 aprint_verbose_dev(acpi_softc->sc_dev, 2158 "%s activated\n", (*di)->HardwareId.String); 2159 2160 return; 2161 2162 fail: 2163 aprint_error_dev(acpi_softc->sc_dev, "failed to " 2164 "activate %s\n", (*di)->HardwareId.String); 2165 } 2166 2167 /* 2168 * XXX: This very incomplete. 2169 */ 2170 ACPI_STATUS 2171 acpi_allocate_resources(ACPI_HANDLE handle) 2172 { 2173 ACPI_BUFFER bufp, bufc, bufn; 2174 ACPI_RESOURCE *resp, *resc, *resn; 2175 ACPI_RESOURCE_IRQ *irq; 2176 #if 0 2177 ACPI_RESOURCE_EXTENDED_IRQ *xirq; 2178 #endif 2179 ACPI_STATUS rv; 2180 uint delta; 2181 2182 rv = acpi_get(handle, &bufp, AcpiGetPossibleResources); 2183 if (ACPI_FAILURE(rv)) 2184 goto out; 2185 rv = acpi_get(handle, &bufc, AcpiGetCurrentResources); 2186 if (ACPI_FAILURE(rv)) { 2187 goto out1; 2188 } 2189 2190 bufn.Length = 1000; 2191 bufn.Pointer = resn = malloc(bufn.Length, M_ACPI, M_WAITOK); 2192 resp = bufp.Pointer; 2193 resc = bufc.Pointer; 2194 while (resc->Type != ACPI_RESOURCE_TYPE_END_TAG && 2195 resp->Type != ACPI_RESOURCE_TYPE_END_TAG) { 2196 while (resc->Type != resp->Type && resp->Type != ACPI_RESOURCE_TYPE_END_TAG) 2197 resp = ACPI_NEXT_RESOURCE(resp); 2198 if (resp->Type == ACPI_RESOURCE_TYPE_END_TAG) 2199 break; 2200 /* Found identical Id */ 2201 resn->Type = resc->Type; 2202 switch (resc->Type) { 2203 case ACPI_RESOURCE_TYPE_IRQ: 2204 memcpy(&resn->Data, &resp->Data, 2205 sizeof(ACPI_RESOURCE_IRQ)); 2206 irq = (ACPI_RESOURCE_IRQ *)&resn->Data; 2207 irq->Interrupts[0] = 2208 ((ACPI_RESOURCE_IRQ *)&resp->Data)-> 2209 Interrupts[irq->InterruptCount-1]; 2210 irq->InterruptCount = 1; 2211 resn->Length = ACPI_RS_SIZE(ACPI_RESOURCE_IRQ); 2212 break; 2213 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 2214 memcpy(&resn->Data, &resp->Data, 2215 sizeof(ACPI_RESOURCE_EXTENDED_IRQ)); 2216 #if 0 2217 xirq = (ACPI_RESOURCE_EXTENDED_IRQ *)&resn->Data; 2218 /* 2219 * XXX: Not duplicating the interrupt logic above 2220 * because its not clear what it accomplishes. 2221 */ 2222 xirq->Interrupts[0] = 2223 ((ACPI_RESOURCE_EXT_IRQ *)&resp->Data)-> 2224 Interrupts[irq->NumberOfInterrupts-1]; 2225 xirq->NumberOfInterrupts = 1; 2226 #endif 2227 resn->Length = ACPI_RS_SIZE(ACPI_RESOURCE_EXTENDED_IRQ); 2228 break; 2229 case ACPI_RESOURCE_TYPE_IO: 2230 memcpy(&resn->Data, &resp->Data, 2231 sizeof(ACPI_RESOURCE_IO)); 2232 resn->Length = resp->Length; 2233 break; 2234 default: 2235 aprint_error_dev(acpi_softc->sc_dev, 2236 "%s: invalid type %u\n", __func__, resc->Type); 2237 rv = AE_BAD_DATA; 2238 goto out2; 2239 } 2240 resc = ACPI_NEXT_RESOURCE(resc); 2241 resn = ACPI_NEXT_RESOURCE(resn); 2242 resp = ACPI_NEXT_RESOURCE(resp); 2243 delta = (uint8_t *)resn - (uint8_t *)bufn.Pointer; 2244 if (delta >= 2245 bufn.Length-ACPI_RS_SIZE(ACPI_RESOURCE_DATA)) { 2246 bufn.Length *= 2; 2247 bufn.Pointer = realloc(bufn.Pointer, bufn.Length, 2248 M_ACPI, M_WAITOK); 2249 resn = (ACPI_RESOURCE *)((uint8_t *)bufn.Pointer + 2250 delta); 2251 } 2252 } 2253 2254 if (resc->Type != ACPI_RESOURCE_TYPE_END_TAG) { 2255 aprint_error_dev(acpi_softc->sc_dev, 2256 "%s: resc not exhausted\n", __func__); 2257 rv = AE_BAD_DATA; 2258 goto out3; 2259 } 2260 2261 resn->Type = ACPI_RESOURCE_TYPE_END_TAG; 2262 rv = AcpiSetCurrentResources(handle, &bufn); 2263 2264 if (ACPI_FAILURE(rv)) 2265 aprint_error_dev(acpi_softc->sc_dev, "%s: failed to set " 2266 "resources: %s\n", __func__, AcpiFormatException(rv)); 2267 2268 out3: 2269 free(bufn.Pointer, M_ACPI); 2270 out2: 2271 ACPI_FREE(bufc.Pointer); 2272 out1: 2273 ACPI_FREE(bufp.Pointer); 2274 out: 2275 return rv; 2276 } 2277 2278 #endif /* ACPI_ACTIVATE_DEV */ 2279
Indexes created Tue Jun 23 00:25:03 UTC 2026