acpi.c revision 1.254.2.1
1 /* $NetBSD: acpi.c,v 1.254.2.1 2012/09/12 06:15:32 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 1.254.2.1 2012/09/12 06:15:32 tls Exp $"); 104 105 #include "opt_acpi.h" 106 #include "opt_pcifixup.h" 107 108 #include <sys/param.h> 109 #include <sys/device.h> 110 #include <sys/kernel.h> 111 #include <sys/kmem.h> 112 #include <sys/malloc.h> 113 #include <sys/module.h> 114 #include <sys/mutex.h> 115 #include <sys/sysctl.h> 116 #include <sys/systm.h> 117 #include <sys/timetc.h> 118 119 #include <dev/acpi/acpireg.h> 120 #include <dev/acpi/acpivar.h> 121 #include <dev/acpi/acpi_osd.h> 122 #include <dev/acpi/acpi_pci.h> 123 #include <dev/acpi/acpi_power.h> 124 #include <dev/acpi/acpi_timer.h> 125 #include <dev/acpi/acpi_wakedev.h> 126 127 #include <machine/acpi_machdep.h> 128 129 #define _COMPONENT ACPI_BUS_COMPONENT 130 ACPI_MODULE_NAME ("acpi") 131 132 /* 133 * The acpi_active variable is set when the ACPI subsystem is active. 134 * Machine-dependent code may wish to skip other steps (such as attaching 135 * subsystems that ACPI supercedes) when ACPI is active. 136 */ 137 int acpi_active = 0; 138 int acpi_suspended = 0; 139 int acpi_force_load = 0; 140 int acpi_verbose_loaded = 0; 141 142 struct acpi_softc *acpi_softc = NULL; 143 static uint64_t acpi_root_pointer; 144 extern kmutex_t acpi_interrupt_list_mtx; 145 extern struct cfdriver acpi_cd; 146 static ACPI_HANDLE acpi_scopes[4]; 147 ACPI_TABLE_HEADER *madt_header; 148 149 /* 150 * This structure provides a context for the ACPI 151 * namespace walk performed in acpi_build_tree(). 152 */ 153 struct acpi_walkcontext { 154 struct acpi_softc *aw_sc; 155 struct acpi_devnode *aw_parent; 156 }; 157 158 /* 159 * Ignored HIDs. 160 */ 161 static const char * const acpi_ignored_ids[] = { 162 #if defined(i386) || defined(x86_64) 163 "ACPI0007", /* ACPI CPUs do not attach to acpi(4) */ 164 "PNP0000", /* AT interrupt controller is handled internally */ 165 "PNP0200", /* AT DMA controller is handled internally */ 166 "PNP0A??", /* PCI Busses are handled internally */ 167 "PNP0B00", /* AT RTC is handled internally */ 168 "PNP0C0F", /* ACPI PCI link devices are handled internally */ 169 #endif 170 #if defined(x86_64) 171 "PNP0C04", /* FPU is handled internally */ 172 #endif 173 NULL 174 }; 175 176 /* 177 * Devices that should be attached early. 178 */ 179 static const char * const acpi_early_ids[] = { 180 "PNP0C09", /* acpiec(4) */ 181 NULL 182 }; 183 184 static int acpi_match(device_t, cfdata_t, void *); 185 static int acpi_submatch(device_t, cfdata_t, const int *, void *); 186 static void acpi_attach(device_t, device_t, void *); 187 static int acpi_detach(device_t, int); 188 static void acpi_childdet(device_t, device_t); 189 static bool acpi_suspend(device_t, const pmf_qual_t *); 190 static bool acpi_resume(device_t, const pmf_qual_t *); 191 192 static void acpi_build_tree(struct acpi_softc *); 193 static ACPI_STATUS acpi_make_devnode(ACPI_HANDLE, uint32_t, 194 void *, void **); 195 static ACPI_STATUS acpi_make_devnode_post(ACPI_HANDLE, uint32_t, 196 void *, void **); 197 static void acpi_make_name(struct acpi_devnode *, uint32_t); 198 199 static int acpi_rescan(device_t, const char *, const int *); 200 static void acpi_rescan_early(struct acpi_softc *); 201 static void acpi_rescan_nodes(struct acpi_softc *); 202 static void acpi_rescan_capabilities(device_t); 203 static int acpi_print(void *aux, const char *); 204 205 static void acpi_notify_handler(ACPI_HANDLE, uint32_t, void *); 206 207 static void acpi_register_fixed_button(struct acpi_softc *, int); 208 static void acpi_deregister_fixed_button(struct acpi_softc *, int); 209 static uint32_t acpi_fixed_button_handler(void *); 210 static void acpi_fixed_button_pressed(void *); 211 212 static void acpi_sleep_init(struct acpi_softc *); 213 214 static int sysctl_hw_acpi_fixedstats(SYSCTLFN_PROTO); 215 static int sysctl_hw_acpi_sleepstate(SYSCTLFN_PROTO); 216 static int sysctl_hw_acpi_sleepstates(SYSCTLFN_PROTO); 217 218 static bool acpi_is_scope(struct acpi_devnode *); 219 static ACPI_TABLE_HEADER *acpi_map_rsdt(void); 220 static void acpi_unmap_rsdt(ACPI_TABLE_HEADER *); 221 222 void acpi_print_verbose_stub(struct acpi_softc *); 223 void acpi_print_dev_stub(const char *); 224 225 static void acpi_activate_device(ACPI_HANDLE, ACPI_DEVICE_INFO **); 226 ACPI_STATUS acpi_allocate_resources(ACPI_HANDLE); 227 228 void (*acpi_print_verbose)(struct acpi_softc *) = acpi_print_verbose_stub; 229 void (*acpi_print_dev)(const char *) = acpi_print_dev_stub; 230 231 CFATTACH_DECL2_NEW(acpi, sizeof(struct acpi_softc), 232 acpi_match, acpi_attach, acpi_detach, NULL, acpi_rescan, acpi_childdet); 233 234 /* 235 * Probe for ACPI support. 236 * 237 * This is called by the machine-dependent ACPI front-end. 238 * Note: this is not an autoconfiguration interface function. 239 */ 240 int 241 acpi_probe(void) 242 { 243 ACPI_TABLE_HEADER *rsdt; 244 ACPI_STATUS rv; 245 int quirks; 246 247 if (acpi_softc != NULL) 248 panic("%s: already probed", __func__); 249 250 mutex_init(&acpi_interrupt_list_mtx, MUTEX_DEFAULT, IPL_NONE); 251 252 /* 253 * Start up ACPICA. 254 */ 255 AcpiGbl_AllMethodsSerialized = false; 256 AcpiGbl_EnableInterpreterSlack = true; 257 258 rv = AcpiInitializeSubsystem(); 259 260 if (ACPI_FAILURE(rv)) { 261 aprint_error("%s: failed to initialize subsystem\n", __func__); 262 return 0; 263 } 264 265 /* 266 * Allocate space for RSDT/XSDT and DSDT, 267 * but allow resizing if more tables exist. 268 */ 269 rv = AcpiInitializeTables(NULL, 2, true); 270 271 if (ACPI_FAILURE(rv)) { 272 aprint_error("%s: failed to initialize tables\n", __func__); 273 goto fail; 274 } 275 276 rv = AcpiLoadTables(); 277 278 if (ACPI_FAILURE(rv)) { 279 aprint_error("%s: failed to load tables\n", __func__); 280 goto fail; 281 } 282 283 rsdt = acpi_map_rsdt(); 284 285 if (rsdt == NULL) { 286 aprint_error("%s: failed to map RSDT\n", __func__); 287 goto fail; 288 } 289 290 quirks = acpi_find_quirks(); 291 292 if (acpi_force_load == 0 && (quirks & ACPI_QUIRK_BROKEN) != 0) { 293 294 aprint_normal("ACPI: BIOS is listed as broken:\n"); 295 aprint_normal("ACPI: X/RSDT: OemId <%6.6s,%8.8s,%08x>, " 296 "AslId <%4.4s,%08x>\n", rsdt->OemId, rsdt->OemTableId, 297 rsdt->OemRevision, rsdt->AslCompilerId, 298 rsdt->AslCompilerRevision); 299 aprint_normal("ACPI: Not used. Set acpi_force_load to use.\n"); 300 301 acpi_unmap_rsdt(rsdt); 302 goto fail; 303 } 304 305 if (acpi_force_load == 0 && (quirks & ACPI_QUIRK_OLDBIOS) != 0) { 306 307 aprint_normal("ACPI: BIOS is too old (%s). " 308 "Set acpi_force_load to use.\n", 309 pmf_get_platform("bios-date")); 310 311 acpi_unmap_rsdt(rsdt); 312 goto fail; 313 } 314 315 acpi_unmap_rsdt(rsdt); 316 317 rv = AcpiEnableSubsystem(~(ACPI_NO_HARDWARE_INIT|ACPI_NO_ACPI_ENABLE)); 318 319 if (ACPI_FAILURE(rv)) { 320 aprint_error("%s: failed to enable subsystem\n", __func__); 321 goto fail; 322 } 323 324 return 1; 325 326 fail: 327 (void)AcpiTerminate(); 328 329 return 0; 330 } 331 332 void 333 acpi_disable(void) 334 { 335 336 if (acpi_softc == NULL) 337 return; 338 339 KASSERT(acpi_active != 0); 340 341 if (AcpiGbl_FADT.SmiCommand != 0) 342 AcpiDisable(); 343 } 344 345 int 346 acpi_check(device_t parent, const char *ifattr) 347 { 348 return (config_search_ia(acpi_submatch, parent, ifattr, NULL) != NULL); 349 } 350 351 int 352 acpi_reset(void) 353 { 354 struct acpi_softc *sc = acpi_softc; 355 ACPI_GENERIC_ADDRESS *ResetReg; 356 ACPI_PCI_ID PciId; 357 ACPI_STATUS status; 358 359 if (sc == NULL) 360 return ENXIO; 361 362 ResetReg = &AcpiGbl_FADT.ResetRegister; 363 364 /* Check if the reset register is supported */ 365 if (!(AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) || 366 !ResetReg->Address) { 367 return ENOENT; 368 } 369 370 switch (ResetReg->SpaceId) { 371 case ACPI_ADR_SPACE_PCI_CONFIG: 372 PciId.Segment = PciId.Bus = 0; 373 PciId.Device = ACPI_GAS_PCI_DEV(ResetReg->Address); 374 PciId.Function = ACPI_GAS_PCI_FUNC(ResetReg->Address); 375 status = AcpiOsWritePciConfiguration(&PciId, 376 ACPI_GAS_PCI_REGOFF(ResetReg->Address), 377 AcpiGbl_FADT.ResetValue, ResetReg->BitWidth); 378 break; 379 case ACPI_ADR_SPACE_SYSTEM_IO: 380 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 381 status = AcpiReset(); 382 break; 383 default: 384 status = AE_TYPE; 385 break; 386 } 387 388 return ACPI_FAILURE(status) ? EIO : 0; 389 } 390 391 /* 392 * Autoconfiguration. 393 */ 394 static int 395 acpi_match(device_t parent, cfdata_t match, void *aux) 396 { 397 /* 398 * XXX: Nada; MD code has called acpi_probe(). 399 */ 400 return 1; 401 } 402 403 static int 404 acpi_submatch(device_t parent, cfdata_t cf, const int *locs, void *aux) 405 { 406 struct cfattach *ca; 407 408 ca = config_cfattach_lookup(cf->cf_name, cf->cf_atname); 409 410 return (ca == &acpi_ca); 411 } 412 413 static void 414 acpi_attach(device_t parent, device_t self, void *aux) 415 { 416 struct acpi_softc *sc = device_private(self); 417 struct acpibus_attach_args *aa = aux; 418 ACPI_TABLE_HEADER *rsdt; 419 ACPI_STATUS rv; 420 421 aprint_naive("\n"); 422 aprint_normal(": Intel ACPICA %08x\n", ACPI_CA_VERSION); 423 424 if (acpi_softc != NULL) 425 panic("%s: already attached", __func__); 426 427 rsdt = acpi_map_rsdt(); 428 429 if (rsdt == NULL) 430 aprint_error_dev(self, "X/RSDT: Not found\n"); 431 else { 432 aprint_verbose_dev(self, 433 "X/RSDT: OemId <%6.6s,%8.8s,%08x>, AslId <%4.4s,%08x>\n", 434 rsdt->OemId, rsdt->OemTableId, 435 rsdt->OemRevision, 436 rsdt->AslCompilerId, rsdt->AslCompilerRevision); 437 } 438 439 acpi_unmap_rsdt(rsdt); 440 441 /* Clamp the max transfer size - assume LPC devs may be beneath us. */ 442 self->dv_maxphys = MIN(parent->dv_maxphys, 64 * 1024); 443 444 sc->sc_dev = self; 445 sc->sc_root = NULL; 446 447 sc->sc_sleepstate = ACPI_STATE_S0; 448 sc->sc_quirks = acpi_find_quirks(); 449 450 sysmon_power_settype("acpi"); 451 452 sc->sc_iot = aa->aa_iot; 453 sc->sc_memt = aa->aa_memt; 454 sc->sc_pc = aa->aa_pc; 455 sc->sc_pciflags = aa->aa_pciflags; 456 sc->sc_ic = aa->aa_ic; 457 458 SIMPLEQ_INIT(&sc->ad_head); 459 460 acpi_softc = sc; 461 462 if (pmf_device_register(self, acpi_suspend, acpi_resume) != true) 463 aprint_error_dev(self, "couldn't establish power handler\n"); 464 465 /* 466 * Bring ACPICA on-line. 467 */ 468 #define ACPI_ENABLE_PHASE1 \ 469 (ACPI_NO_HANDLER_INIT | ACPI_NO_EVENT_INIT) 470 #define ACPI_ENABLE_PHASE2 \ 471 (ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE | \ 472 ACPI_NO_ADDRESS_SPACE_INIT) 473 474 rv = AcpiEnableSubsystem(ACPI_ENABLE_PHASE1); 475 476 if (ACPI_FAILURE(rv)) 477 goto fail; 478 479 acpi_md_callback(); 480 481 rv = AcpiEnableSubsystem(ACPI_ENABLE_PHASE2); 482 483 if (ACPI_FAILURE(rv)) 484 goto fail; 485 486 /* 487 * Early initialization of acpiec(4) via ECDT. 488 */ 489 (void)config_found_ia(self, "acpiecdtbus", aa, NULL); 490 491 rv = AcpiInitializeObjects(ACPI_FULL_INITIALIZATION); 492 493 if (ACPI_FAILURE(rv)) 494 goto fail; 495 496 /* 497 * Early initialization of the _PDC control method 498 * that may load additional SSDT tables dynamically. 499 */ 500 (void)acpi_md_pdc(); 501 502 /* 503 * Install global notify handlers. 504 */ 505 rv = AcpiInstallNotifyHandler(ACPI_ROOT_OBJECT, 506 ACPI_SYSTEM_NOTIFY, acpi_notify_handler, NULL); 507 508 if (ACPI_FAILURE(rv)) 509 goto fail; 510 511 rv = AcpiInstallNotifyHandler(ACPI_ROOT_OBJECT, 512 ACPI_DEVICE_NOTIFY, acpi_notify_handler, NULL); 513 514 if (ACPI_FAILURE(rv)) 515 goto fail; 516 517 acpi_active = 1; 518 519 /* Show SCI interrupt. */ 520 aprint_verbose_dev(self, "SCI interrupting at int %u\n", 521 AcpiGbl_FADT.SciInterrupt); 522 523 /* 524 * Install fixed-event handlers. 525 */ 526 acpi_register_fixed_button(sc, ACPI_EVENT_POWER_BUTTON); 527 acpi_register_fixed_button(sc, ACPI_EVENT_SLEEP_BUTTON); 528 529 acpitimer_init(sc); 530 531 /* 532 * Scan the namespace and build our device tree. 533 */ 534 acpi_build_tree(sc); 535 acpi_sleep_init(sc); 536 537 #ifdef ACPI_DEBUG 538 acpi_debug_init(); 539 #endif 540 541 /* 542 * Print debug information. 543 */ 544 acpi_print_verbose(sc); 545 546 return; 547 548 fail: 549 aprint_error("%s: failed to initialize ACPI: %s\n", 550 __func__, AcpiFormatException(rv)); 551 } 552 553 /* 554 * XXX: This is incomplete. 555 */ 556 static int 557 acpi_detach(device_t self, int flags) 558 { 559 struct acpi_softc *sc = device_private(self); 560 ACPI_STATUS rv; 561 int rc; 562 563 rv = AcpiRemoveNotifyHandler(ACPI_ROOT_OBJECT, 564 ACPI_SYSTEM_NOTIFY, acpi_notify_handler); 565 566 if (ACPI_FAILURE(rv)) 567 return EBUSY; 568 569 rv = AcpiRemoveNotifyHandler(ACPI_ROOT_OBJECT, 570 ACPI_DEVICE_NOTIFY, acpi_notify_handler); 571 572 if (ACPI_FAILURE(rv)) 573 return EBUSY; 574 575 if ((rc = config_detach_children(self, flags)) != 0) 576 return rc; 577 578 if ((rc = acpitimer_detach()) != 0) 579 return rc; 580 581 acpi_deregister_fixed_button(sc, ACPI_EVENT_POWER_BUTTON); 582 acpi_deregister_fixed_button(sc, ACPI_EVENT_SLEEP_BUTTON); 583 584 pmf_device_deregister(self); 585 586 acpi_softc = NULL; 587 588 return 0; 589 } 590 591 static void 592 acpi_childdet(device_t self, device_t child) 593 { 594 struct acpi_softc *sc = device_private(self); 595 struct acpi_devnode *ad; 596 597 if (sc->sc_apmbus == child) 598 sc->sc_apmbus = NULL; 599 600 if (sc->sc_hpet == child) 601 sc->sc_hpet = NULL; 602 603 if (sc->sc_wdrt == child) 604 sc->sc_wdrt = NULL; 605 606 SIMPLEQ_FOREACH(ad, &sc->ad_head, ad_list) { 607 608 if (ad->ad_device == child) 609 ad->ad_device = NULL; 610 } 611 } 612 613 static bool 614 acpi_suspend(device_t dv, const pmf_qual_t *qual) 615 { 616 617 acpi_suspended = 1; 618 619 return true; 620 } 621 622 static bool 623 acpi_resume(device_t dv, const pmf_qual_t *qual) 624 { 625 626 acpi_suspended = 0; 627 628 return true; 629 } 630 631 /* 632 * Namespace scan. 633 */ 634 static void 635 acpi_build_tree(struct acpi_softc *sc) 636 { 637 struct acpi_walkcontext awc; 638 639 /* 640 * Get the root scope handles. 641 */ 642 KASSERT(__arraycount(acpi_scopes) == 4); 643 644 (void)AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_PR_", &acpi_scopes[0]); 645 (void)AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &acpi_scopes[1]); 646 (void)AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SI_", &acpi_scopes[2]); 647 (void)AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_TZ_", &acpi_scopes[3]); 648 649 /* 650 * Make the root node. 651 */ 652 awc.aw_sc = sc; 653 awc.aw_parent = NULL; 654 655 (void)acpi_make_devnode(ACPI_ROOT_OBJECT, 0, &awc, NULL); 656 657 KASSERT(sc->sc_root == NULL); 658 KASSERT(awc.aw_parent != NULL); 659 660 sc->sc_root = awc.aw_parent; 661 662 /* 663 * Build the internal namespace. 664 */ 665 (void)AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, UINT32_MAX, 666 acpi_make_devnode, acpi_make_devnode_post, &awc, NULL); 667 668 /* 669 * Scan the internal namespace. 670 */ 671 (void)acpi_pcidev_scan(sc->sc_root); 672 (void)acpi_rescan(sc->sc_dev, NULL, NULL); 673 674 /* 675 * Update GPE information. 676 * 677 * Note that this must be called after 678 * all GPE handlers have been installed. 679 */ 680 (void)AcpiUpdateAllGpes(); 681 682 /* 683 * Defer rest of the configuration. 684 */ 685 (void)config_defer(sc->sc_dev, acpi_rescan_capabilities); 686 } 687 688 static ACPI_STATUS 689 acpi_make_devnode(ACPI_HANDLE handle, uint32_t level, 690 void *context, void **status) 691 { 692 struct acpi_walkcontext *awc = context; 693 struct acpi_softc *sc = awc->aw_sc; 694 struct acpi_devnode *ad; 695 ACPI_DEVICE_INFO *devinfo; 696 ACPI_OBJECT_TYPE type; 697 ACPI_STATUS rv; 698 699 rv = AcpiGetObjectInfo(handle, &devinfo); 700 701 if (ACPI_FAILURE(rv)) 702 return AE_OK; /* Do not terminate the walk. */ 703 704 type = devinfo->Type; 705 706 switch (type) { 707 708 case ACPI_TYPE_DEVICE: 709 acpi_activate_device(handle, &devinfo); 710 case ACPI_TYPE_PROCESSOR: 711 case ACPI_TYPE_THERMAL: 712 case ACPI_TYPE_POWER: 713 714 ad = kmem_zalloc(sizeof(*ad), KM_SLEEP); 715 716 if (ad == NULL) 717 return AE_NO_MEMORY; 718 719 ad->ad_device = NULL; 720 ad->ad_notify = NULL; 721 ad->ad_pciinfo = NULL; 722 ad->ad_wakedev = NULL; 723 724 ad->ad_type = type; 725 ad->ad_handle = handle; 726 ad->ad_devinfo = devinfo; 727 728 ad->ad_root = sc->sc_dev; 729 ad->ad_parent = awc->aw_parent; 730 731 acpi_match_node_init(ad); 732 acpi_make_name(ad, devinfo->Name); 733 734 /* 735 * Identify wake GPEs from the _PRW. Note that 736 * AcpiUpdateAllGpes() must be called afterwards. 737 */ 738 if (ad->ad_devinfo->Type == ACPI_TYPE_DEVICE) 739 acpi_wakedev_init(ad); 740 741 SIMPLEQ_INIT(&ad->ad_child_head); 742 SIMPLEQ_INSERT_TAIL(&sc->ad_head, ad, ad_list); 743 744 if (ad->ad_parent != NULL) { 745 746 SIMPLEQ_INSERT_TAIL(&ad->ad_parent->ad_child_head, 747 ad, ad_child_list); 748 } 749 750 awc->aw_parent = ad; 751 } 752 753 return AE_OK; 754 } 755 756 static ACPI_STATUS 757 acpi_make_devnode_post(ACPI_HANDLE handle, uint32_t level, 758 void *context, void **status) 759 { 760 struct acpi_walkcontext *awc = context; 761 762 KASSERT(awc != NULL); 763 KASSERT(awc->aw_parent != NULL); 764 765 if (handle == awc->aw_parent->ad_handle) 766 awc->aw_parent = awc->aw_parent->ad_parent; 767 768 return AE_OK; 769 } 770 771 static void 772 acpi_make_name(struct acpi_devnode *ad, uint32_t name) 773 { 774 ACPI_NAME_UNION *anu; 775 int clear, i; 776 777 anu = (ACPI_NAME_UNION *)&name; 778 ad->ad_name[4] = '\0'; 779 780 for (i = 3, clear = 0; i >= 0; i--) { 781 782 if (clear == 0 && anu->Ascii[i] == '_') 783 ad->ad_name[i] = '\0'; 784 else { 785 ad->ad_name[i] = anu->Ascii[i]; 786 clear = 1; 787 } 788 } 789 790 if (ad->ad_name[0] == '\0') 791 ad->ad_name[0] = '_'; 792 } 793 794 /* 795 * Device attachment. 796 */ 797 static int 798 acpi_rescan(device_t self, const char *ifattr, const int *locators) 799 { 800 struct acpi_softc *sc = device_private(self); 801 struct acpi_attach_args aa; 802 803 /* 804 * Try to attach hpet(4) first via a specific table. 805 */ 806 aa.aa_memt = sc->sc_memt; 807 808 if (ifattr_match(ifattr, "acpihpetbus") && sc->sc_hpet == NULL) 809 sc->sc_hpet = config_found_ia(sc->sc_dev, 810 "acpihpetbus", &aa, NULL); 811 812 /* 813 * A two-pass scan for acpinodebus. 814 */ 815 if (ifattr_match(ifattr, "acpinodebus")) { 816 acpi_rescan_early(sc); 817 acpi_rescan_nodes(sc); 818 } 819 820 /* 821 * Attach APM emulation and acpiwdrt(4). 822 */ 823 if (ifattr_match(ifattr, "acpiapmbus") && sc->sc_apmbus == NULL) 824 sc->sc_apmbus = config_found_ia(sc->sc_dev, 825 "acpiapmbus", NULL, NULL); 826 827 if (ifattr_match(ifattr, "acpiwdrtbus") && sc->sc_wdrt == NULL) 828 sc->sc_wdrt = config_found_ia(sc->sc_dev, 829 "acpiwdrtbus", NULL, NULL); 830 831 return 0; 832 } 833 834 static void 835 acpi_rescan_early(struct acpi_softc *sc) 836 { 837 struct acpi_attach_args aa; 838 struct acpi_devnode *ad; 839 840 /* 841 * First scan for devices such as acpiec(4) that 842 * should be always attached before anything else. 843 * We want these devices to attach regardless of 844 * the device status and other restrictions. 845 */ 846 SIMPLEQ_FOREACH(ad, &sc->ad_head, ad_list) { 847 848 if (ad->ad_device != NULL) 849 continue; 850 851 if (ad->ad_devinfo->Type != ACPI_TYPE_DEVICE) 852 continue; 853 854 if (acpi_match_hid(ad->ad_devinfo, acpi_early_ids) == 0) 855 continue; 856 857 aa.aa_node = ad; 858 aa.aa_iot = sc->sc_iot; 859 aa.aa_memt = sc->sc_memt; 860 aa.aa_pc = sc->sc_pc; 861 aa.aa_pciflags = sc->sc_pciflags; 862 aa.aa_ic = sc->sc_ic; 863 864 ad->ad_device = config_found_ia(sc->sc_dev, 865 "acpinodebus", &aa, acpi_print); 866 } 867 } 868 869 static void 870 acpi_rescan_nodes(struct acpi_softc *sc) 871 { 872 const char * const hpet_ids[] = { "PNP0103", NULL }; 873 struct acpi_attach_args aa; 874 struct acpi_devnode *ad; 875 ACPI_DEVICE_INFO *di; 876 877 SIMPLEQ_FOREACH(ad, &sc->ad_head, ad_list) { 878 879 if (ad->ad_device != NULL) 880 continue; 881 882 /* 883 * There is a bug in ACPICA: it defines the type 884 * of the scopes incorrectly for its own reasons. 885 */ 886 if (acpi_is_scope(ad) != false) 887 continue; 888 889 di = ad->ad_devinfo; 890 891 /* 892 * We only attach devices which are present, enabled, and 893 * functioning properly. However, if a device is enabled, 894 * it is decoding resources and we should claim these, 895 * if possible. This requires changes to bus_space(9). 896 * Note: there is a possible race condition, because _STA 897 * may have changed since di->CurrentStatus was set. 898 */ 899 if (di->Type == ACPI_TYPE_DEVICE) { 900 901 if ((di->Valid & ACPI_VALID_STA) != 0 && 902 (di->CurrentStatus & ACPI_STA_OK) != ACPI_STA_OK) 903 continue; 904 } 905 906 if (di->Type == ACPI_TYPE_POWER) 907 continue; 908 909 if (di->Type == ACPI_TYPE_PROCESSOR) 910 continue; 911 912 if (acpi_match_hid(di, acpi_early_ids) != 0) 913 continue; 914 915 if (acpi_match_hid(di, acpi_ignored_ids) != 0) 916 continue; 917 918 if (acpi_match_hid(di, hpet_ids) != 0 && sc->sc_hpet != NULL) 919 continue; 920 921 aa.aa_node = ad; 922 aa.aa_iot = sc->sc_iot; 923 aa.aa_memt = sc->sc_memt; 924 aa.aa_pc = sc->sc_pc; 925 aa.aa_pciflags = sc->sc_pciflags; 926 aa.aa_ic = sc->sc_ic; 927 928 ad->ad_device = config_found_ia(sc->sc_dev, 929 "acpinodebus", &aa, acpi_print); 930 } 931 } 932 933 static void 934 acpi_rescan_capabilities(device_t self) 935 { 936 struct acpi_softc *sc = device_private(self); 937 struct acpi_devnode *ad; 938 ACPI_HANDLE tmp; 939 ACPI_STATUS rv; 940 941 SIMPLEQ_FOREACH(ad, &sc->ad_head, ad_list) { 942 943 if (ad->ad_devinfo->Type != ACPI_TYPE_DEVICE) 944 continue; 945 946 /* 947 * Scan power resource capabilities. 948 * 949 * If any power states are supported, 950 * at least _PR0 and _PR3 must be present. 951 */ 952 rv = AcpiGetHandle(ad->ad_handle, "_PR0", &tmp); 953 954 if (ACPI_SUCCESS(rv)) { 955 ad->ad_flags |= ACPI_DEVICE_POWER; 956 acpi_power_add(ad); 957 } 958 959 /* 960 * Scan wake-up capabilities. 961 */ 962 if (ad->ad_wakedev != NULL) { 963 ad->ad_flags |= ACPI_DEVICE_WAKEUP; 964 acpi_wakedev_add(ad); 965 } 966 967 /* 968 * Scan docking stations. 969 */ 970 rv = AcpiGetHandle(ad->ad_handle, "_DCK", &tmp); 971 972 if (ACPI_SUCCESS(rv)) 973 ad->ad_flags |= ACPI_DEVICE_DOCK; 974 975 /* 976 * Scan devices that are ejectable. 977 */ 978 rv = AcpiGetHandle(ad->ad_handle, "_EJ0", &tmp); 979 980 if (ACPI_SUCCESS(rv)) 981 ad->ad_flags |= ACPI_DEVICE_EJECT; 982 } 983 } 984 985 static int 986 acpi_print(void *aux, const char *pnp) 987 { 988 struct acpi_attach_args *aa = aux; 989 struct acpi_devnode *ad; 990 const char *hid, *uid; 991 ACPI_DEVICE_INFO *di; 992 993 ad = aa->aa_node; 994 di = ad->ad_devinfo; 995 996 hid = di->HardwareId.String; 997 uid = di->UniqueId.String; 998 999 if (pnp != NULL) { 1000 1001 if (di->Type != ACPI_TYPE_DEVICE) { 1002 1003 aprint_normal("%s (ACPI Object Type '%s') at %s", 1004 ad->ad_name, AcpiUtGetTypeName(ad->ad_type), pnp); 1005 1006 return UNCONF; 1007 } 1008 1009 if ((di->Valid & ACPI_VALID_HID) == 0 || hid == NULL) 1010 return 0; 1011 1012 aprint_normal("%s (%s) ", ad->ad_name, hid); 1013 acpi_print_dev(hid); 1014 aprint_normal("at %s", pnp); 1015 1016 return UNCONF; 1017 } 1018 1019 aprint_normal(" (%s", ad->ad_name); 1020 1021 if ((di->Valid & ACPI_VALID_HID) != 0 && hid != NULL) { 1022 1023 aprint_normal(", %s", hid); 1024 1025 if ((di->Valid & ACPI_VALID_UID) != 0 && uid != NULL) { 1026 1027 if (uid[0] == '\0') 1028 uid = "<null>"; 1029 1030 aprint_normal("-%s", uid); 1031 } 1032 } 1033 1034 aprint_normal(")"); 1035 1036 return UNCONF; 1037 } 1038 1039 /* 1040 * Notify. 1041 */ 1042 static void 1043 acpi_notify_handler(ACPI_HANDLE handle, uint32_t event, void *aux) 1044 { 1045 struct acpi_softc *sc = acpi_softc; 1046 struct acpi_devnode *ad; 1047 1048 KASSERT(sc != NULL); 1049 KASSERT(aux == NULL); 1050 KASSERT(acpi_active != 0); 1051 1052 if (acpi_suspended != 0) 1053 return; 1054 1055 /* 1056 * System: 0x00 - 0x7F. 1057 * Device: 0x80 - 0xFF. 1058 */ 1059 switch (event) { 1060 1061 case ACPI_NOTIFY_BUS_CHECK: 1062 case ACPI_NOTIFY_DEVICE_CHECK: 1063 case ACPI_NOTIFY_DEVICE_WAKE: 1064 case ACPI_NOTIFY_EJECT_REQUEST: 1065 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: 1066 case ACPI_NOTIFY_FREQUENCY_MISMATCH: 1067 case ACPI_NOTIFY_BUS_MODE_MISMATCH: 1068 case ACPI_NOTIFY_POWER_FAULT: 1069 case ACPI_NOTIFY_CAPABILITIES_CHECK: 1070 case ACPI_NOTIFY_DEVICE_PLD_CHECK: 1071 case ACPI_NOTIFY_RESERVED: 1072 case ACPI_NOTIFY_LOCALITY_UPDATE: 1073 break; 1074 } 1075 1076 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "notification 0x%02X for " 1077 "%s (%p)\n", event, acpi_name(handle), handle)); 1078 1079 /* 1080 * We deliver notifications only to drivers 1081 * that have been successfully attached and 1082 * that have registered a handler with us. 1083 * The opaque pointer is always the device_t. 1084 */ 1085 SIMPLEQ_FOREACH(ad, &sc->ad_head, ad_list) { 1086 1087 if (ad->ad_device == NULL) 1088 continue; 1089 1090 if (ad->ad_notify == NULL) 1091 continue; 1092 1093 if (ad->ad_handle != handle) 1094 continue; 1095 1096 (*ad->ad_notify)(ad->ad_handle, event, ad->ad_device); 1097 1098 return; 1099 } 1100 1101 aprint_debug_dev(sc->sc_dev, "unhandled notify 0x%02X " 1102 "for %s (%p)\n", event, acpi_name(handle), handle); 1103 } 1104 1105 bool 1106 acpi_register_notify(struct acpi_devnode *ad, ACPI_NOTIFY_HANDLER notify) 1107 { 1108 struct acpi_softc *sc = acpi_softc; 1109 1110 KASSERT(sc != NULL); 1111 KASSERT(acpi_active != 0); 1112 1113 if (acpi_suspended != 0) 1114 goto fail; 1115 1116 if (ad == NULL || notify == NULL) 1117 goto fail; 1118 1119 ad->ad_notify = notify; 1120 1121 return true; 1122 1123 fail: 1124 aprint_error_dev(sc->sc_dev, "failed to register notify " 1125 "handler for %s (%p)\n", ad->ad_name, ad->ad_handle); 1126 1127 return false; 1128 } 1129 1130 void 1131 acpi_deregister_notify(struct acpi_devnode *ad) 1132 { 1133 1134 ad->ad_notify = NULL; 1135 } 1136 1137 /* 1138 * Fixed buttons. 1139 */ 1140 static void 1141 acpi_register_fixed_button(struct acpi_softc *sc, int event) 1142 { 1143 struct sysmon_pswitch *smpsw; 1144 ACPI_STATUS rv; 1145 int type; 1146 1147 switch (event) { 1148 1149 case ACPI_EVENT_POWER_BUTTON: 1150 1151 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) != 0) 1152 return; 1153 1154 type = PSWITCH_TYPE_POWER; 1155 smpsw = &sc->sc_smpsw_power; 1156 break; 1157 1158 case ACPI_EVENT_SLEEP_BUTTON: 1159 1160 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) != 0) 1161 return; 1162 1163 type = PSWITCH_TYPE_SLEEP; 1164 smpsw = &sc->sc_smpsw_sleep; 1165 break; 1166 1167 default: 1168 rv = AE_TYPE; 1169 goto fail; 1170 } 1171 1172 smpsw->smpsw_type = type; 1173 smpsw->smpsw_name = device_xname(sc->sc_dev); 1174 1175 if (sysmon_pswitch_register(smpsw) != 0) { 1176 rv = AE_ERROR; 1177 goto fail; 1178 } 1179 1180 AcpiClearEvent(event); 1181 1182 rv = AcpiInstallFixedEventHandler(event, 1183 acpi_fixed_button_handler, smpsw); 1184 1185 if (ACPI_FAILURE(rv)) { 1186 sysmon_pswitch_unregister(smpsw); 1187 goto fail; 1188 } 1189 1190 aprint_debug_dev(sc->sc_dev, "fixed %s button present\n", 1191 (type != ACPI_EVENT_SLEEP_BUTTON) ? "power" : "sleep"); 1192 1193 return; 1194 1195 fail: 1196 aprint_error_dev(sc->sc_dev, "failed to register " 1197 "fixed event %d: %s\n", event, AcpiFormatException(rv)); 1198 } 1199 1200 static void 1201 acpi_deregister_fixed_button(struct acpi_softc *sc, int event) 1202 { 1203 struct sysmon_pswitch *smpsw; 1204 ACPI_STATUS rv; 1205 1206 switch (event) { 1207 1208 case ACPI_EVENT_POWER_BUTTON: 1209 smpsw = &sc->sc_smpsw_power; 1210 1211 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) != 0) { 1212 KASSERT(smpsw->smpsw_type != PSWITCH_TYPE_POWER); 1213 return; 1214 } 1215 1216 break; 1217 1218 case ACPI_EVENT_SLEEP_BUTTON: 1219 smpsw = &sc->sc_smpsw_sleep; 1220 1221 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) != 0) { 1222 KASSERT(smpsw->smpsw_type != PSWITCH_TYPE_SLEEP); 1223 return; 1224 } 1225 1226 break; 1227 1228 default: 1229 rv = AE_TYPE; 1230 goto fail; 1231 } 1232 1233 rv = AcpiRemoveFixedEventHandler(event, acpi_fixed_button_handler); 1234 1235 if (ACPI_SUCCESS(rv)) { 1236 sysmon_pswitch_unregister(smpsw); 1237 return; 1238 } 1239 1240 fail: 1241 aprint_error_dev(sc->sc_dev, "failed to deregister " 1242 "fixed event: %s\n", AcpiFormatException(rv)); 1243 } 1244 1245 static uint32_t 1246 acpi_fixed_button_handler(void *context) 1247 { 1248 static const int handler = OSL_NOTIFY_HANDLER; 1249 struct sysmon_pswitch *smpsw = context; 1250 1251 (void)AcpiOsExecute(handler, acpi_fixed_button_pressed, smpsw); 1252 1253 return ACPI_INTERRUPT_HANDLED; 1254 } 1255 1256 static void 1257 acpi_fixed_button_pressed(void *context) 1258 { 1259 struct sysmon_pswitch *smpsw = context; 1260 1261 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s fixed button pressed\n", 1262 (smpsw->smpsw_type != ACPI_EVENT_SLEEP_BUTTON) ? 1263 "power" : "sleep")); 1264 1265 sysmon_pswitch_event(smpsw, PSWITCH_EVENT_PRESSED); 1266 } 1267 1268 /* 1269 * Sleep. 1270 */ 1271 static void 1272 acpi_sleep_init(struct acpi_softc *sc) 1273 { 1274 uint8_t a, b, i; 1275 ACPI_STATUS rv; 1276 1277 CTASSERT(ACPI_STATE_S0 == 0 && ACPI_STATE_S1 == 1); 1278 CTASSERT(ACPI_STATE_S2 == 2 && ACPI_STATE_S3 == 3); 1279 CTASSERT(ACPI_STATE_S4 == 4 && ACPI_STATE_S5 == 5); 1280 1281 /* 1282 * Evaluate supported sleep states. 1283 */ 1284 for (i = ACPI_STATE_S0; i <= ACPI_STATE_S5; i++) { 1285 1286 rv = AcpiGetSleepTypeData(i, &a, &b); 1287 1288 if (ACPI_SUCCESS(rv)) 1289 sc->sc_sleepstates |= __BIT(i); 1290 } 1291 } 1292 1293 /* 1294 * Must be called with interrupts enabled. 1295 */ 1296 void 1297 acpi_enter_sleep_state(int state) 1298 { 1299 struct acpi_softc *sc = acpi_softc; 1300 ACPI_STATUS rv; 1301 int err; 1302 1303 if (acpi_softc == NULL) 1304 return; 1305 1306 if (state == sc->sc_sleepstate) 1307 return; 1308 1309 if (state < ACPI_STATE_S0 || state > ACPI_STATE_S5) 1310 return; 1311 1312 aprint_normal_dev(sc->sc_dev, "entering state S%d\n", state); 1313 1314 switch (state) { 1315 1316 case ACPI_STATE_S0: 1317 sc->sc_sleepstate = ACPI_STATE_S0; 1318 return; 1319 1320 case ACPI_STATE_S1: 1321 case ACPI_STATE_S2: 1322 case ACPI_STATE_S3: 1323 case ACPI_STATE_S4: 1324 1325 if ((sc->sc_sleepstates & __BIT(state)) == 0) { 1326 aprint_error_dev(sc->sc_dev, "sleep state " 1327 "S%d is not available\n", state); 1328 return; 1329 } 1330 1331 /* 1332 * Evaluate the _TTS method. This should be done before 1333 * pmf_system_suspend(9) and the evaluation of _PTS. 1334 * We should also re-evaluate this once we return to 1335 * S0 or if we abort the sleep state transition in the 1336 * middle (see ACPI 3.0, section 7.3.6). In reality, 1337 * however, the _TTS method is seldom seen in the field. 1338 */ 1339 rv = acpi_eval_set_integer(NULL, "\\_TTS", state); 1340 1341 if (ACPI_SUCCESS(rv)) 1342 aprint_debug_dev(sc->sc_dev, "evaluated _TTS\n"); 1343 1344 if (state != ACPI_STATE_S1 && 1345 pmf_system_suspend(PMF_Q_NONE) != true) { 1346 aprint_error_dev(sc->sc_dev, "aborting suspend\n"); 1347 break; 1348 } 1349 1350 /* 1351 * This will evaluate the _PTS and _SST methods, 1352 * but unlike the documentation claims, not _GTS, 1353 * which is evaluated in AcpiEnterSleepState(). 1354 * This must be called with interrupts enabled. 1355 */ 1356 rv = AcpiEnterSleepStatePrep(state); 1357 1358 if (ACPI_FAILURE(rv)) { 1359 aprint_error_dev(sc->sc_dev, "failed to prepare " 1360 "S%d: %s\n", state, AcpiFormatException(rv)); 1361 break; 1362 } 1363 1364 /* 1365 * After the _PTS method has been evaluated, we can 1366 * enable wake and evaluate _PSW (ACPI 4.0, p. 284). 1367 */ 1368 acpi_wakedev_commit(sc, state); 1369 1370 sc->sc_sleepstate = state; 1371 1372 if (state == ACPI_STATE_S1) { 1373 1374 /* 1375 * Before the transition to S1, CPU caches 1376 * must be flushed (see ACPI 4.0, 7.3.4.2). 1377 * 1378 * Note that interrupts must be off before 1379 * calling AcpiEnterSleepState(). Conversely, 1380 * AcpiLeaveSleepState() should always be 1381 * called with interrupts enabled. 1382 */ 1383 acpi_md_OsDisableInterrupt(); 1384 1385 ACPI_FLUSH_CPU_CACHE(); 1386 rv = AcpiEnterSleepState(state); 1387 1388 if (ACPI_FAILURE(rv)) 1389 aprint_error_dev(sc->sc_dev, "failed to " 1390 "enter S1: %s\n", AcpiFormatException(rv)); 1391 1392 /* 1393 * Clear fixed events and disable all GPEs before 1394 * interrupts are enabled. 1395 */ 1396 AcpiClearEvent(ACPI_EVENT_PMTIMER); 1397 AcpiClearEvent(ACPI_EVENT_GLOBAL); 1398 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1399 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1400 AcpiClearEvent(ACPI_EVENT_RTC); 1401 AcpiHwDisableAllGpes(); 1402 1403 acpi_md_OsEnableInterrupt(); 1404 rv = AcpiLeaveSleepState(state); 1405 1406 } else { 1407 1408 err = acpi_md_sleep(state); 1409 1410 if (state == ACPI_STATE_S4) 1411 AcpiEnable(); 1412 1413 (void)pmf_system_bus_resume(PMF_Q_NONE); 1414 (void)AcpiLeaveSleepState(state); 1415 (void)AcpiSetFirmwareWakingVector(0); 1416 (void)pmf_system_resume(PMF_Q_NONE); 1417 } 1418 1419 /* 1420 * No wake GPEs should be enabled at runtime. 1421 */ 1422 acpi_wakedev_commit(sc, ACPI_STATE_S0); 1423 break; 1424 1425 case ACPI_STATE_S5: 1426 1427 (void)acpi_eval_set_integer(NULL, "\\_TTS", ACPI_STATE_S5); 1428 1429 rv = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1430 1431 if (ACPI_FAILURE(rv)) { 1432 aprint_error_dev(sc->sc_dev, "failed to prepare " 1433 "S%d: %s\n", state, AcpiFormatException(rv)); 1434 break; 1435 } 1436 1437 (void)AcpiDisableAllGpes(); 1438 1439 DELAY(1000000); 1440 1441 sc->sc_sleepstate = state; 1442 acpi_md_OsDisableInterrupt(); 1443 1444 (void)AcpiEnterSleepState(ACPI_STATE_S5); 1445 1446 aprint_error_dev(sc->sc_dev, "WARNING: powerdown failed!\n"); 1447 1448 break; 1449 } 1450 1451 sc->sc_sleepstate = ACPI_STATE_S0; 1452 1453 (void)acpi_eval_set_integer(NULL, "\\_TTS", ACPI_STATE_S0); 1454 } 1455 1456 /* 1457 * Sysctl. 1458 */ 1459 SYSCTL_SETUP(sysctl_acpi_setup, "sysctl hw.acpi subtree setup") 1460 { 1461 const struct sysctlnode *rnode, *snode; 1462 int err; 1463 1464 err = sysctl_createv(clog, 0, NULL, &rnode, 1465 CTLFLAG_PERMANENT, CTLTYPE_NODE, "hw", 1466 NULL, NULL, 0, NULL, 0, 1467 CTL_HW, CTL_EOL); 1468 1469 if (err != 0) 1470 return; 1471 1472 err = sysctl_createv(clog, 0, &rnode, &rnode, 1473 CTLFLAG_PERMANENT, CTLTYPE_NODE, 1474 "acpi", SYSCTL_DESCR("ACPI subsystem parameters"), 1475 NULL, 0, NULL, 0, 1476 CTL_CREATE, CTL_EOL); 1477 1478 if (err != 0) 1479 return; 1480 1481 (void)sysctl_createv(NULL, 0, &rnode, NULL, 1482 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD, 1483 "root", SYSCTL_DESCR("ACPI root pointer"), 1484 NULL, 0, &acpi_root_pointer, sizeof(acpi_root_pointer), 1485 CTL_CREATE, CTL_EOL); 1486 1487 err = sysctl_createv(clog, 0, &rnode, &snode, 1488 CTLFLAG_PERMANENT, CTLTYPE_NODE, 1489 "sleep", SYSCTL_DESCR("ACPI sleep"), 1490 NULL, 0, NULL, 0, 1491 CTL_CREATE, CTL_EOL); 1492 1493 if (err != 0) 1494 return; 1495 1496 (void)sysctl_createv(NULL, 0, &snode, NULL, 1497 CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT, 1498 "state", SYSCTL_DESCR("System sleep state"), 1499 sysctl_hw_acpi_sleepstate, 0, NULL, 0, 1500 CTL_CREATE, CTL_EOL); 1501 1502 (void)sysctl_createv(NULL, 0, &snode, NULL, 1503 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_STRING, 1504 "states", SYSCTL_DESCR("Supported sleep states"), 1505 sysctl_hw_acpi_sleepstates, 0, NULL, 0, 1506 CTL_CREATE, CTL_EOL); 1507 1508 err = sysctl_createv(clog, 0, &rnode, &rnode, 1509 CTLFLAG_PERMANENT, CTLTYPE_NODE, 1510 "stat", SYSCTL_DESCR("ACPI statistics"), 1511 NULL, 0, NULL, 0, 1512 CTL_CREATE, CTL_EOL); 1513 1514 if (err != 0) 1515 return; 1516 1517 (void)sysctl_createv(clog, 0, &rnode, NULL, 1518 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD, 1519 "gpe", SYSCTL_DESCR("Number of dispatched GPEs"), 1520 NULL, 0, &AcpiGpeCount, sizeof(AcpiGpeCount), 1521 CTL_CREATE, CTL_EOL); 1522 1523 (void)sysctl_createv(clog, 0, &rnode, NULL, 1524 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD, 1525 "sci", SYSCTL_DESCR("Number of SCI interrupts"), 1526 NULL, 0, &AcpiSciCount, sizeof(AcpiSciCount), 1527 CTL_CREATE, CTL_EOL); 1528 1529 (void)sysctl_createv(clog, 0, &rnode, NULL, 1530 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD, 1531 "fixed", SYSCTL_DESCR("Number of fixed events"), 1532 sysctl_hw_acpi_fixedstats, 0, NULL, 0, 1533 CTL_CREATE, CTL_EOL); 1534 1535 (void)sysctl_createv(clog, 0, &rnode, NULL, 1536 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD, 1537 "method", SYSCTL_DESCR("Number of methods executed"), 1538 NULL, 0, &AcpiMethodCount, sizeof(AcpiMethodCount), 1539 CTL_CREATE, CTL_EOL); 1540 1541 CTASSERT(sizeof(AcpiGpeCount) == sizeof(uint64_t)); 1542 CTASSERT(sizeof(AcpiSciCount) == sizeof(uint64_t)); 1543 } 1544 1545 static int 1546 sysctl_hw_acpi_fixedstats(SYSCTLFN_ARGS) 1547 { 1548 struct sysctlnode node; 1549 uint64_t t; 1550 int err, i; 1551 1552 for (i = t = 0; i < __arraycount(AcpiFixedEventCount); i++) 1553 t += AcpiFixedEventCount[i]; 1554 1555 node = *rnode; 1556 node.sysctl_data = &t; 1557 1558 err = sysctl_lookup(SYSCTLFN_CALL(&node)); 1559 1560 if (err || newp == NULL) 1561 return err; 1562 1563 return 0; 1564 } 1565 1566 static int 1567 sysctl_hw_acpi_sleepstate(SYSCTLFN_ARGS) 1568 { 1569 struct acpi_softc *sc = acpi_softc; 1570 struct sysctlnode node; 1571 int err, t; 1572 1573 if (acpi_softc == NULL) 1574 return ENOSYS; 1575 1576 node = *rnode; 1577 t = sc->sc_sleepstate; 1578 node.sysctl_data = &t; 1579 1580 err = sysctl_lookup(SYSCTLFN_CALL(&node)); 1581 1582 if (err || newp == NULL) 1583 return err; 1584 1585 if (t < ACPI_STATE_S0 || t > ACPI_STATE_S5) 1586 return EINVAL; 1587 1588 acpi_enter_sleep_state(t); 1589 1590 return 0; 1591 } 1592 1593 static int 1594 sysctl_hw_acpi_sleepstates(SYSCTLFN_ARGS) 1595 { 1596 struct acpi_softc *sc = acpi_softc; 1597 struct sysctlnode node; 1598 char t[3 * 6 + 1]; 1599 int err; 1600 1601 if (acpi_softc == NULL) 1602 return ENOSYS; 1603 1604 (void)memset(t, '\0', sizeof(t)); 1605 1606 (void)snprintf(t, sizeof(t), "%s%s%s%s%s%s", 1607 ((sc->sc_sleepstates & __BIT(0)) != 0) ? "S0 " : "", 1608 ((sc->sc_sleepstates & __BIT(1)) != 0) ? "S1 " : "", 1609 ((sc->sc_sleepstates & __BIT(2)) != 0) ? "S2 " : "", 1610 ((sc->sc_sleepstates & __BIT(3)) != 0) ? "S3 " : "", 1611 ((sc->sc_sleepstates & __BIT(4)) != 0) ? "S4 " : "", 1612 ((sc->sc_sleepstates & __BIT(5)) != 0) ? "S5 " : ""); 1613 1614 node = *rnode; 1615 node.sysctl_data = &t; 1616 1617 err = sysctl_lookup(SYSCTLFN_CALL(&node)); 1618 1619 if (err || newp == NULL) 1620 return err; 1621 1622 return 0; 1623 } 1624 1625 /* 1626 * Tables. 1627 */ 1628 ACPI_PHYSICAL_ADDRESS 1629 acpi_OsGetRootPointer(void) 1630 { 1631 ACPI_PHYSICAL_ADDRESS PhysicalAddress; 1632 1633 /* 1634 * We let MD code handle this since there are multiple ways to do it: 1635 * 1636 * IA-32: Use AcpiFindRootPointer() to locate the RSDP. 1637 * 1638 * IA-64: Use the EFI. 1639 */ 1640 PhysicalAddress = acpi_md_OsGetRootPointer(); 1641 1642 if (acpi_root_pointer == 0) 1643 acpi_root_pointer = PhysicalAddress; 1644 1645 return PhysicalAddress; 1646 } 1647 1648 static ACPI_TABLE_HEADER * 1649 acpi_map_rsdt(void) 1650 { 1651 ACPI_PHYSICAL_ADDRESS paddr; 1652 ACPI_TABLE_RSDP *rsdp; 1653 1654 paddr = AcpiOsGetRootPointer(); 1655 1656 if (paddr == 0) 1657 return NULL; 1658 1659 rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP)); 1660 1661 if (rsdp == NULL) 1662 return NULL; 1663 1664 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress) 1665 paddr = rsdp->XsdtPhysicalAddress; 1666 else 1667 paddr = rsdp->RsdtPhysicalAddress; 1668 1669 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 1670 1671 return AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER)); 1672 } 1673 1674 /* 1675 * XXX: Refactor to be a generic function that unmaps tables. 1676 */ 1677 static void 1678 acpi_unmap_rsdt(ACPI_TABLE_HEADER *rsdt) 1679 { 1680 1681 if (rsdt == NULL) 1682 return; 1683 1684 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 1685 } 1686 1687 /* 1688 * XXX: Refactor to be a generic function that maps tables. 1689 */ 1690 ACPI_STATUS 1691 acpi_madt_map(void) 1692 { 1693 ACPI_STATUS rv; 1694 1695 if (madt_header != NULL) 1696 return AE_ALREADY_EXISTS; 1697 1698 rv = AcpiGetTable(ACPI_SIG_MADT, 1, &madt_header); 1699 1700 if (ACPI_FAILURE(rv)) 1701 return rv; 1702 1703 return AE_OK; 1704 } 1705 1706 void 1707 acpi_madt_unmap(void) 1708 { 1709 madt_header = NULL; 1710 } 1711 1712 /* 1713 * XXX: Refactor to be a generic function that walks tables. 1714 */ 1715 void 1716 acpi_madt_walk(ACPI_STATUS (*func)(ACPI_SUBTABLE_HEADER *, void *), void *aux) 1717 { 1718 ACPI_SUBTABLE_HEADER *hdrp; 1719 char *madtend, *where; 1720 1721 madtend = (char *)madt_header + madt_header->Length; 1722 where = (char *)madt_header + sizeof (ACPI_TABLE_MADT); 1723 1724 while (where < madtend) { 1725 1726 hdrp = (ACPI_SUBTABLE_HEADER *)where; 1727 1728 if (ACPI_FAILURE(func(hdrp, aux))) 1729 break; 1730 1731 where += hdrp->Length; 1732 } 1733 } 1734 1735 /* 1736 * Miscellaneous. 1737 */ 1738 static bool 1739 acpi_is_scope(struct acpi_devnode *ad) 1740 { 1741 int i; 1742 1743 /* 1744 * Return true if the node is a root scope. 1745 */ 1746 if (ad->ad_parent == NULL) 1747 return false; 1748 1749 if (ad->ad_parent->ad_handle != ACPI_ROOT_OBJECT) 1750 return false; 1751 1752 for (i = 0; i < __arraycount(acpi_scopes); i++) { 1753 1754 if (acpi_scopes[i] == NULL) 1755 continue; 1756 1757 if (ad->ad_handle == acpi_scopes[i]) 1758 return true; 1759 } 1760 1761 return false; 1762 } 1763 1764 /* 1765 * ACPIVERBOSE. 1766 */ 1767 void 1768 acpi_load_verbose(void) 1769 { 1770 1771 if (acpi_verbose_loaded == 0) 1772 module_autoload("acpiverbose", MODULE_CLASS_MISC); 1773 } 1774 1775 void 1776 acpi_print_verbose_stub(struct acpi_softc *sc) 1777 { 1778 1779 acpi_load_verbose(); 1780 1781 if (acpi_verbose_loaded != 0) 1782 acpi_print_verbose(sc); 1783 } 1784 1785 void 1786 acpi_print_dev_stub(const char *pnpstr) 1787 { 1788 1789 acpi_load_verbose(); 1790 1791 if (acpi_verbose_loaded != 0) 1792 acpi_print_dev(pnpstr); 1793 } 1794 1795 MALLOC_DECLARE(M_ACPI); /* XXX: ACPI_ACTIVATE_DEV should use kmem(9). */ 1796 1797 /* 1798 * ACPI_ACTIVATE_DEV. 1799 */ 1800 static void 1801 acpi_activate_device(ACPI_HANDLE handle, ACPI_DEVICE_INFO **di) 1802 { 1803 1804 #ifndef ACPI_ACTIVATE_DEV 1805 return; 1806 } 1807 #else 1808 static const int valid = ACPI_VALID_STA | ACPI_VALID_HID; 1809 ACPI_DEVICE_INFO *newdi; 1810 ACPI_STATUS rv; 1811 uint32_t old; 1812 1813 /* 1814 * If the device is valid and present, 1815 * but not enabled, try to activate it. 1816 */ 1817 if (((*di)->Valid & valid) != valid) 1818 return; 1819 1820 old = (*di)->CurrentStatus; 1821 1822 if ((old & (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED)) != 1823 ACPI_STA_DEVICE_PRESENT) 1824 return; 1825 1826 rv = acpi_allocate_resources(handle); 1827 1828 if (ACPI_FAILURE(rv)) 1829 goto fail; 1830 1831 rv = AcpiGetObjectInfo(handle, &newdi); 1832 1833 if (ACPI_FAILURE(rv)) 1834 goto fail; 1835 1836 ACPI_FREE(*di); 1837 *di = newdi; 1838 1839 aprint_verbose_dev(acpi_softc->sc_dev, 1840 "%s activated, STA 0x%08X -> STA 0x%08X\n", 1841 (*di)->HardwareId.String, old, (*di)->CurrentStatus); 1842 1843 return; 1844 1845 fail: 1846 aprint_error_dev(acpi_softc->sc_dev, "failed to " 1847 "activate %s\n", (*di)->HardwareId.String); 1848 } 1849 1850 /* 1851 * XXX: This very incomplete. 1852 */ 1853 ACPI_STATUS 1854 acpi_allocate_resources(ACPI_HANDLE handle) 1855 { 1856 ACPI_BUFFER bufp, bufc, bufn; 1857 ACPI_RESOURCE *resp, *resc, *resn; 1858 ACPI_RESOURCE_IRQ *irq; 1859 ACPI_RESOURCE_EXTENDED_IRQ *xirq; 1860 ACPI_STATUS rv; 1861 uint delta; 1862 1863 rv = acpi_get(handle, &bufp, AcpiGetPossibleResources); 1864 if (ACPI_FAILURE(rv)) 1865 goto out; 1866 rv = acpi_get(handle, &bufc, AcpiGetCurrentResources); 1867 if (ACPI_FAILURE(rv)) { 1868 goto out1; 1869 } 1870 1871 bufn.Length = 1000; 1872 bufn.Pointer = resn = malloc(bufn.Length, M_ACPI, M_WAITOK); 1873 resp = bufp.Pointer; 1874 resc = bufc.Pointer; 1875 while (resc->Type != ACPI_RESOURCE_TYPE_END_TAG && 1876 resp->Type != ACPI_RESOURCE_TYPE_END_TAG) { 1877 while (resc->Type != resp->Type && resp->Type != ACPI_RESOURCE_TYPE_END_TAG) 1878 resp = ACPI_NEXT_RESOURCE(resp); 1879 if (resp->Type == ACPI_RESOURCE_TYPE_END_TAG) 1880 break; 1881 /* Found identical Id */ 1882 resn->Type = resc->Type; 1883 switch (resc->Type) { 1884 case ACPI_RESOURCE_TYPE_IRQ: 1885 memcpy(&resn->Data, &resp->Data, 1886 sizeof(ACPI_RESOURCE_IRQ)); 1887 irq = (ACPI_RESOURCE_IRQ *)&resn->Data; 1888 irq->Interrupts[0] = 1889 ((ACPI_RESOURCE_IRQ *)&resp->Data)-> 1890 Interrupts[irq->InterruptCount-1]; 1891 irq->InterruptCount = 1; 1892 resn->Length = ACPI_RS_SIZE(ACPI_RESOURCE_IRQ); 1893 break; 1894 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 1895 memcpy(&resn->Data, &resp->Data, 1896 sizeof(ACPI_RESOURCE_EXTENDED_IRQ)); 1897 xirq = (ACPI_RESOURCE_EXTENDED_IRQ *)&resn->Data; 1898 #if 0 1899 /* 1900 * XXX: Not duplicating the interrupt logic above 1901 * because its not clear what it accomplishes. 1902 */ 1903 xirq->Interrupts[0] = 1904 ((ACPI_RESOURCE_EXT_IRQ *)&resp->Data)-> 1905 Interrupts[irq->NumberOfInterrupts-1]; 1906 xirq->NumberOfInterrupts = 1; 1907 #endif 1908 resn->Length = ACPI_RS_SIZE(ACPI_RESOURCE_EXTENDED_IRQ); 1909 break; 1910 case ACPI_RESOURCE_TYPE_IO: 1911 memcpy(&resn->Data, &resp->Data, 1912 sizeof(ACPI_RESOURCE_IO)); 1913 resn->Length = resp->Length; 1914 break; 1915 default: 1916 aprint_error_dev(acpi_softc->sc_dev, 1917 "%s: invalid type %u\n", __func__, resc->Type); 1918 rv = AE_BAD_DATA; 1919 goto out2; 1920 } 1921 resc = ACPI_NEXT_RESOURCE(resc); 1922 resn = ACPI_NEXT_RESOURCE(resn); 1923 resp = ACPI_NEXT_RESOURCE(resp); 1924 delta = (uint8_t *)resn - (uint8_t *)bufn.Pointer; 1925 if (delta >= 1926 bufn.Length-ACPI_RS_SIZE(ACPI_RESOURCE_DATA)) { 1927 bufn.Length *= 2; 1928 bufn.Pointer = realloc(bufn.Pointer, bufn.Length, 1929 M_ACPI, M_WAITOK); 1930 resn = (ACPI_RESOURCE *)((uint8_t *)bufn.Pointer + 1931 delta); 1932 } 1933 } 1934 1935 if (resc->Type != ACPI_RESOURCE_TYPE_END_TAG) { 1936 aprint_error_dev(acpi_softc->sc_dev, 1937 "%s: resc not exhausted\n", __func__); 1938 rv = AE_BAD_DATA; 1939 goto out3; 1940 } 1941 1942 resn->Type = ACPI_RESOURCE_TYPE_END_TAG; 1943 rv = AcpiSetCurrentResources(handle, &bufn); 1944 1945 if (ACPI_FAILURE(rv)) 1946 aprint_error_dev(acpi_softc->sc_dev, "%s: failed to set " 1947 "resources: %s\n", __func__, AcpiFormatException(rv)); 1948 1949 out3: 1950 free(bufn.Pointer, M_ACPI); 1951 out2: 1952 ACPI_FREE(bufc.Pointer); 1953 out1: 1954 ACPI_FREE(bufp.Pointer); 1955 out: 1956 return rv; 1957 } 1958 1959 #endif /* ACPI_ACTIVATE_DEV */ 1960
Indexes created Wed Oct 01 19:09:53 GMT 2025