1 /* $NetBSD: acpi.c,v 1.264 2017/10/28 04:53:55 riastradh 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 1.264 2017/10/28 04:53:55 riastradh 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_mcfg.h> 122 #include <dev/acpi/acpi_osd.h> 123 #include <dev/acpi/acpi_pci.h> 124 #include <dev/acpi/acpi_power.h> 125 #include <dev/acpi/acpi_timer.h> 126 #include <dev/acpi/acpi_wakedev.h> 127 128 #include <machine/acpi_machdep.h> 129 130 #include "ioconf.h" 131 132 #define _COMPONENT ACPI_BUS_COMPONENT 133 ACPI_MODULE_NAME ("acpi") 134 135 /* 136 * The acpi_active variable is set when the ACPI subsystem is active. 137 * Machine-dependent code may wish to skip other steps (such as attaching 138 * subsystems that ACPI supercedes) when ACPI is active. 139 */ 140 int acpi_active = 0; 141 int acpi_suspended = 0; 142 int acpi_force_load = 0; 143 int acpi_verbose_loaded = 0; 144 145 struct acpi_softc *acpi_softc = NULL; 146 static uint64_t acpi_root_pointer; 147 extern kmutex_t acpi_interrupt_list_mtx; 148 static ACPI_HANDLE acpi_scopes[4]; 149 ACPI_TABLE_HEADER *madt_header; 150 151 /* 152 * This structure provides a context for the ACPI 153 * namespace walk performed in acpi_build_tree(). 154 */ 155 struct acpi_walkcontext { 156 struct acpi_softc *aw_sc; 157 struct acpi_devnode *aw_parent; 158 }; 159 160 /* 161 * Ignored HIDs. 162 */ 163 static const char * const acpi_ignored_ids[] = { 164 #if defined(i386) || defined(x86_64) 165 "ACPI0007", /* ACPI CPUs do not attach to acpi(4) */ 166 "PNP0000", /* AT interrupt controller is handled internally */ 167 "PNP0200", /* AT DMA controller is handled internally */ 168 "PNP0A??", /* PCI Busses are handled internally */ 169 "PNP0B00", /* AT RTC is handled internally */ 170 "PNP0C0F", /* ACPI PCI link devices are handled internally */ 171 #endif 172 #if defined(x86_64) 173 "PNP0C04", /* FPU is handled internally */ 174 #endif 175 NULL 176 }; 177 178 /* 179 * Devices that should be attached early. 180 */ 181 static const char * const acpi_early_ids[] = { 182 "PNP0C09", /* acpiec(4) */ 183 NULL 184 }; 185 186 static int acpi_match(device_t, cfdata_t, void *); 187 static int acpi_submatch(device_t, cfdata_t, const int *, void *); 188 static void acpi_attach(device_t, device_t, void *); 189 static int acpi_detach(device_t, int); 190 static void acpi_childdet(device_t, device_t); 191 static bool acpi_suspend(device_t, const pmf_qual_t *); 192 static bool acpi_resume(device_t, const pmf_qual_t *); 193 194 static void acpi_build_tree(struct acpi_softc *); 195 static void acpi_config_tree(struct acpi_softc *); 196 static ACPI_STATUS acpi_make_devnode(ACPI_HANDLE, uint32_t, 197 void *, void **); 198 static ACPI_STATUS acpi_make_devnode_post(ACPI_HANDLE, uint32_t, 199 void *, void **); 200 static void acpi_make_name(struct acpi_devnode *, uint32_t); 201 202 static int acpi_rescan(device_t, const char *, const int *); 203 static void acpi_rescan_early(struct acpi_softc *); 204 static void acpi_rescan_nodes(struct acpi_softc *); 205 static void acpi_rescan_capabilities(device_t); 206 static int acpi_print(void *aux, const char *); 207 208 static void acpi_notify_handler(ACPI_HANDLE, uint32_t, void *); 209 210 static void acpi_register_fixed_button(struct acpi_softc *, int); 211 static void acpi_deregister_fixed_button(struct acpi_softc *, int); 212 static uint32_t acpi_fixed_button_handler(void *); 213 static void acpi_fixed_button_pressed(void *); 214 215 static void acpi_sleep_init(struct acpi_softc *); 216 217 static int sysctl_hw_acpi_fixedstats(SYSCTLFN_PROTO); 218 static int sysctl_hw_acpi_sleepstate(SYSCTLFN_PROTO); 219 static int sysctl_hw_acpi_sleepstates(SYSCTLFN_PROTO); 220 221 static bool acpi_is_scope(struct acpi_devnode *); 222 static ACPI_TABLE_HEADER *acpi_map_rsdt(void); 223 static void acpi_unmap_rsdt(ACPI_TABLE_HEADER *); 224 225 void acpi_print_verbose_stub(struct acpi_softc *); 226 void acpi_print_dev_stub(const char *); 227 228 static void acpi_activate_device(ACPI_HANDLE, ACPI_DEVICE_INFO **); 229 ACPI_STATUS acpi_allocate_resources(ACPI_HANDLE); 230 231 void (*acpi_print_verbose)(struct acpi_softc *) = acpi_print_verbose_stub; 232 void (*acpi_print_dev)(const char *) = acpi_print_dev_stub; 233 234 CFATTACH_DECL2_NEW(acpi, sizeof(struct acpi_softc), 235 acpi_match, acpi_attach, acpi_detach, NULL, acpi_rescan, acpi_childdet); 236 237 /* 238 * Probe for ACPI support. 239 * 240 * This is called by the machine-dependent ACPI front-end. 241 * Note: this is not an autoconfiguration interface function. 242 */ 243 int 244 acpi_probe(void) 245 { 246 ACPI_TABLE_HEADER *rsdt; 247 ACPI_STATUS rv; 248 int quirks; 249 250 if (acpi_softc != NULL) 251 panic("%s: already probed", __func__); 252 253 mutex_init(&acpi_interrupt_list_mtx, MUTEX_DEFAULT, IPL_NONE); 254 255 /* 256 * Start up ACPICA. 257 */ 258 AcpiGbl_EnableInterpreterSlack = true; 259 260 rv = AcpiInitializeSubsystem(); 261 262 if (ACPI_FAILURE(rv)) { 263 aprint_error("%s: failed to initialize subsystem\n", __func__); 264 return 0; 265 } 266 267 /* 268 * Allocate space for RSDT/XSDT and DSDT, 269 * but allow resizing if more tables exist. 270 */ 271 rv = AcpiInitializeTables(NULL, 2, true); 272 273 if (ACPI_FAILURE(rv)) { 274 aprint_error("%s: failed to initialize tables\n", __func__); 275 goto fail; 276 } 277 278 rv = AcpiLoadTables(); 279 280 if (ACPI_FAILURE(rv)) { 281 aprint_error("%s: failed to load tables\n", __func__); 282 goto fail; 283 } 284 285 rsdt = acpi_map_rsdt(); 286 287 if (rsdt == NULL) { 288 aprint_error("%s: failed to map RSDT\n", __func__); 289 goto fail; 290 } 291 292 quirks = acpi_find_quirks(); 293 294 if (acpi_force_load == 0 && (quirks & ACPI_QUIRK_BROKEN) != 0) { 295 296 aprint_normal("ACPI: BIOS is listed as broken:\n"); 297 aprint_normal("ACPI: X/RSDT: OemId <%6.6s,%8.8s,%08x>, " 298 "AslId <%4.4s,%08x>\n", rsdt->OemId, rsdt->OemTableId, 299 rsdt->OemRevision, rsdt->AslCompilerId, 300 rsdt->AslCompilerRevision); 301 aprint_normal("ACPI: Not used. Set acpi_force_load to use.\n"); 302 303 acpi_unmap_rsdt(rsdt); 304 goto fail; 305 } 306 307 if (acpi_force_load == 0 && (quirks & ACPI_QUIRK_OLDBIOS) != 0) { 308 309 aprint_normal("ACPI: BIOS is too old (%s). " 310 "Set acpi_force_load to use.\n", 311 pmf_get_platform("bios-date")); 312 313 acpi_unmap_rsdt(rsdt); 314 goto fail; 315 } 316 317 acpi_unmap_rsdt(rsdt); 318 319 rv = AcpiEnableSubsystem(~(ACPI_NO_HARDWARE_INIT|ACPI_NO_ACPI_ENABLE)); 320 321 if (ACPI_FAILURE(rv)) { 322 aprint_error("%s: failed to enable subsystem\n", __func__); 323 goto fail; 324 } 325 326 return 1; 327 328 fail: 329 (void)AcpiTerminate(); 330 331 return 0; 332 } 333 334 void 335 acpi_disable(void) 336 { 337 338 if (acpi_softc == NULL) 339 return; 340 341 KASSERT(acpi_active != 0); 342 343 if (AcpiGbl_FADT.SmiCommand != 0) 344 AcpiDisable(); 345 } 346 347 int 348 acpi_check(device_t parent, const char *ifattr) 349 { 350 return (config_search_ia(acpi_submatch, parent, ifattr, NULL) != NULL); 351 } 352 353 int 354 acpi_reset(void) 355 { 356 struct acpi_softc *sc = acpi_softc; 357 ACPI_GENERIC_ADDRESS *ResetReg; 358 ACPI_PCI_ID PciId; 359 ACPI_STATUS status; 360 361 if (sc == NULL) 362 return ENXIO; 363 364 ResetReg = &AcpiGbl_FADT.ResetRegister; 365 366 /* Check if the reset register is supported */ 367 if (!(AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) || 368 !ResetReg->Address) { 369 return ENOENT; 370 } 371 372 switch (ResetReg->SpaceId) { 373 case ACPI_ADR_SPACE_PCI_CONFIG: 374 PciId.Segment = PciId.Bus = 0; 375 PciId.Device = ACPI_GAS_PCI_DEV(ResetReg->Address); 376 PciId.Function = ACPI_GAS_PCI_FUNC(ResetReg->Address); 377 status = AcpiOsWritePciConfiguration(&PciId, 378 ACPI_GAS_PCI_REGOFF(ResetReg->Address), 379 AcpiGbl_FADT.ResetValue, ResetReg->BitWidth); 380 break; 381 case ACPI_ADR_SPACE_SYSTEM_IO: 382 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 383 status = AcpiReset(); 384 break; 385 default: 386 status = AE_TYPE; 387 break; 388 } 389 390 return ACPI_FAILURE(status) ? EIO : 0; 391 } 392 393 /* 394 * Autoconfiguration. 395 */ 396 static int 397 acpi_match(device_t parent, cfdata_t match, void *aux) 398 { 399 /* 400 * XXX: Nada; MD code has called acpi_probe(). 401 */ 402 return 1; 403 } 404 405 static int 406 acpi_submatch(device_t parent, cfdata_t cf, const int *locs, void *aux) 407 { 408 struct cfattach *ca; 409 410 ca = config_cfattach_lookup(cf->cf_name, cf->cf_atname); 411 412 return (ca == &acpi_ca); 413 } 414 415 static void 416 acpi_attach(device_t parent, device_t self, void *aux) 417 { 418 struct acpi_softc *sc = device_private(self); 419 struct acpibus_attach_args *aa = aux; 420 ACPI_TABLE_HEADER *rsdt; 421 ACPI_STATUS rv; 422 423 aprint_naive("\n"); 424 aprint_normal(": Intel ACPICA %08x\n", ACPI_CA_VERSION); 425 426 if (acpi_softc != NULL) 427 panic("%s: already attached", __func__); 428 429 rsdt = acpi_map_rsdt(); 430 431 if (rsdt == NULL) 432 aprint_error_dev(self, "X/RSDT: Not found\n"); 433 else { 434 aprint_verbose_dev(self, 435 "X/RSDT: OemId <%6.6s,%8.8s,%08x>, AslId <%4.4s,%08x>\n", 436 rsdt->OemId, rsdt->OemTableId, 437 rsdt->OemRevision, 438 rsdt->AslCompilerId, rsdt->AslCompilerRevision); 439 } 440 441 acpi_unmap_rsdt(rsdt); 442 443 sc->sc_dev = self; 444 sc->sc_root = NULL; 445 446 sc->sc_sleepstate = ACPI_STATE_S0; 447 sc->sc_quirks = acpi_find_quirks(); 448 449 sysmon_power_settype("acpi"); 450 451 sc->sc_iot = aa->aa_iot; 452 sc->sc_memt = aa->aa_memt; 453 sc->sc_pc = aa->aa_pc; 454 sc->sc_pciflags = aa->aa_pciflags; 455 sc->sc_ic = aa->aa_ic; 456 sc->sc_dmat = aa->aa_dmat; 457 sc->sc_dmat64 = aa->aa_dmat64; 458 459 SIMPLEQ_INIT(&sc->ad_head); 460 461 acpi_softc = sc; 462 463 if (pmf_device_register(self, acpi_suspend, acpi_resume) != true) 464 aprint_error_dev(self, "couldn't establish power handler\n"); 465 466 /* 467 * Bring ACPICA on-line. 468 */ 469 470 rv = AcpiEnableSubsystem(ACPI_FULL_INITIALIZATION); 471 472 if (ACPI_FAILURE(rv)) 473 goto fail; 474 475 /* 476 * Early initialization of acpiec(4) via ECDT. 477 */ 478 (void)config_found_ia(self, "acpiecdtbus", aa, NULL); 479 480 rv = AcpiInitializeObjects(ACPI_FULL_INITIALIZATION); 481 482 if (ACPI_FAILURE(rv)) 483 goto fail; 484 485 /* 486 * Scan the namespace and build our device tree. 487 */ 488 acpi_build_tree(sc); 489 490 /* 491 * Probe MCFG table 492 */ 493 acpimcfg_probe(sc); 494 495 acpi_md_callback(sc); 496 497 /* 498 * Early initialization of the _PDC control method 499 * that may load additional SSDT tables dynamically. 500 */ 501 (void)acpi_md_pdc(); 502 503 /* 504 * Install global notify handlers. 505 */ 506 rv = AcpiInstallNotifyHandler(ACPI_ROOT_OBJECT, 507 ACPI_SYSTEM_NOTIFY, acpi_notify_handler, NULL); 508 509 if (ACPI_FAILURE(rv)) 510 goto fail; 511 512 rv = AcpiInstallNotifyHandler(ACPI_ROOT_OBJECT, 513 ACPI_DEVICE_NOTIFY, acpi_notify_handler, NULL); 514 515 if (ACPI_FAILURE(rv)) 516 goto fail; 517 518 acpi_active = 1; 519 520 /* Show SCI interrupt. */ 521 aprint_verbose_dev(self, "SCI interrupting at int %u\n", 522 AcpiGbl_FADT.SciInterrupt); 523 524 /* 525 * Install fixed-event handlers. 526 */ 527 acpi_register_fixed_button(sc, ACPI_EVENT_POWER_BUTTON); 528 acpi_register_fixed_button(sc, ACPI_EVENT_SLEEP_BUTTON); 529 530 acpitimer_init(sc); 531 acpi_config_tree(sc); 532 acpi_sleep_init(sc); 533 534 #ifdef ACPI_DEBUG 535 acpi_debug_init(); 536 #endif 537 538 /* 539 * Print debug information. 540 */ 541 acpi_print_verbose(sc); 542 543 return; 544 545 fail: 546 aprint_error("%s: failed to initialize ACPI: %s\n", 547 __func__, AcpiFormatException(rv)); 548 } 549 550 /* 551 * XXX: This is incomplete. 552 */ 553 static int 554 acpi_detach(device_t self, int flags) 555 { 556 struct acpi_softc *sc = device_private(self); 557 ACPI_STATUS rv; 558 int rc; 559 560 rv = AcpiRemoveNotifyHandler(ACPI_ROOT_OBJECT, 561 ACPI_SYSTEM_NOTIFY, acpi_notify_handler); 562 563 if (ACPI_FAILURE(rv)) 564 return EBUSY; 565 566 rv = AcpiRemoveNotifyHandler(ACPI_ROOT_OBJECT, 567 ACPI_DEVICE_NOTIFY, acpi_notify_handler); 568 569 if (ACPI_FAILURE(rv)) 570 return EBUSY; 571 572 if ((rc = config_detach_children(self, flags)) != 0) 573 return rc; 574 575 if ((rc = acpitimer_detach()) != 0) 576 return rc; 577 578 acpi_deregister_fixed_button(sc, ACPI_EVENT_POWER_BUTTON); 579 acpi_deregister_fixed_button(sc, ACPI_EVENT_SLEEP_BUTTON); 580 581 pmf_device_deregister(self); 582 583 acpi_softc = NULL; 584 585 return 0; 586 } 587 588 static void 589 acpi_childdet(device_t self, device_t child) 590 { 591 struct acpi_softc *sc = device_private(self); 592 struct acpi_devnode *ad; 593 594 if (sc->sc_apmbus == child) 595 sc->sc_apmbus = NULL; 596 597 if (sc->sc_hpet == child) 598 sc->sc_hpet = NULL; 599 600 if (sc->sc_wdrt == child) 601 sc->sc_wdrt = NULL; 602 603 SIMPLEQ_FOREACH(ad, &sc->ad_head, ad_list) { 604 605 if (ad->ad_device == child) 606 ad->ad_device = NULL; 607 } 608 } 609 610 static bool 611 acpi_suspend(device_t dv, const pmf_qual_t *qual) 612 { 613 614 acpi_suspended = 1; 615 616 return true; 617 } 618 619 static bool 620 acpi_resume(device_t dv, const pmf_qual_t *qual) 621 { 622 623 acpi_suspended = 0; 624 625 return true; 626 } 627 628 /* 629 * Namespace scan. 630 */ 631 static void 632 acpi_build_tree(struct acpi_softc *sc) 633 { 634 struct acpi_walkcontext awc; 635 636 /* 637 * Get the root scope handles. 638 */ 639 KASSERT(__arraycount(acpi_scopes) == 4); 640 641 (void)AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_PR_", &acpi_scopes[0]); 642 (void)AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &acpi_scopes[1]); 643 (void)AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SI_", &acpi_scopes[2]); 644 (void)AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_TZ_", &acpi_scopes[3]); 645 646 /* 647 * Make the root node. 648 */ 649 awc.aw_sc = sc; 650 awc.aw_parent = NULL; 651 652 (void)acpi_make_devnode(ACPI_ROOT_OBJECT, 0, &awc, NULL); 653 654 KASSERT(sc->sc_root == NULL); 655 KASSERT(awc.aw_parent != NULL); 656 657 sc->sc_root = awc.aw_parent; 658 659 /* 660 * Build the internal namespace. 661 */ 662 (void)AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, UINT32_MAX, 663 acpi_make_devnode, acpi_make_devnode_post, &awc, NULL); 664 665 /* 666 * Scan the internal namespace. 667 */ 668 (void)acpi_pcidev_scan(sc->sc_root); 669 } 670 671 static void 672 acpi_config_tree(struct acpi_softc *sc) 673 { 674 675 /* 676 * Configure all everything found "at acpi?". 677 */ 678 (void)acpi_rescan(sc->sc_dev, NULL, NULL); 679 680 /* 681 * Update GPE information. 682 * 683 * Note that this must be called after 684 * all GPE handlers have been installed. 685 */ 686 (void)AcpiUpdateAllGpes(); 687 688 /* 689 * Defer rest of the configuration. 690 */ 691 (void)config_defer(sc->sc_dev, acpi_rescan_capabilities); 692 } 693 694 static ACPI_STATUS 695 acpi_make_devnode(ACPI_HANDLE handle, uint32_t level, 696 void *context, void **status) 697 { 698 struct acpi_walkcontext *awc = context; 699 struct acpi_softc *sc = awc->aw_sc; 700 struct acpi_devnode *ad; 701 ACPI_DEVICE_INFO *devinfo; 702 ACPI_OBJECT_TYPE type; 703 ACPI_STATUS rv; 704 705 rv = AcpiGetObjectInfo(handle, &devinfo); 706 707 if (ACPI_FAILURE(rv)) 708 return AE_OK; /* Do not terminate the walk. */ 709 710 type = devinfo->Type; 711 712 switch (type) { 713 714 case ACPI_TYPE_DEVICE: 715 acpi_activate_device(handle, &devinfo); 716 case ACPI_TYPE_PROCESSOR: 717 case ACPI_TYPE_THERMAL: 718 case ACPI_TYPE_POWER: 719 720 ad = kmem_zalloc(sizeof(*ad), KM_SLEEP); 721 722 ad->ad_device = NULL; 723 ad->ad_notify = NULL; 724 ad->ad_pciinfo = NULL; 725 ad->ad_wakedev = NULL; 726 727 ad->ad_type = type; 728 ad->ad_handle = handle; 729 ad->ad_devinfo = devinfo; 730 731 ad->ad_root = sc->sc_dev; 732 ad->ad_parent = awc->aw_parent; 733 734 acpi_match_node_init(ad); 735 acpi_make_name(ad, devinfo->Name); 736 737 /* 738 * Identify wake GPEs from the _PRW. Note that 739 * AcpiUpdateAllGpes() must be called afterwards. 740 */ 741 if (ad->ad_devinfo->Type == ACPI_TYPE_DEVICE) 742 acpi_wakedev_init(ad); 743 744 SIMPLEQ_INIT(&ad->ad_child_head); 745 SIMPLEQ_INSERT_TAIL(&sc->ad_head, ad, ad_list); 746 747 if (ad->ad_parent != NULL) { 748 749 SIMPLEQ_INSERT_TAIL(&ad->ad_parent->ad_child_head, 750 ad, ad_child_list); 751 } 752 753 awc->aw_parent = ad; 754 } 755 756 return AE_OK; 757 } 758 759 static ACPI_STATUS 760 acpi_make_devnode_post(ACPI_HANDLE handle, uint32_t level, 761 void *context, void **status) 762 { 763 struct acpi_walkcontext *awc = context; 764 765 KASSERT(awc != NULL); 766 KASSERT(awc->aw_parent != NULL); 767 768 if (handle == awc->aw_parent->ad_handle) 769 awc->aw_parent = awc->aw_parent->ad_parent; 770 771 return AE_OK; 772 } 773 774 static void 775 acpi_make_name(struct acpi_devnode *ad, uint32_t name) 776 { 777 ACPI_NAME_UNION *anu; 778 int clear, i; 779 780 anu = (ACPI_NAME_UNION *)&name; 781 ad->ad_name[4] = '\0'; 782 783 for (i = 3, clear = 0; i >= 0; i--) { 784 785 if (clear == 0 && anu->Ascii[i] == '_') 786 ad->ad_name[i] = '\0'; 787 else { 788 ad->ad_name[i] = anu->Ascii[i]; 789 clear = 1; 790 } 791 } 792 793 if (ad->ad_name[0] == '\0') 794 ad->ad_name[0] = '_'; 795 } 796 797 /* 798 * Device attachment. 799 */ 800 static int 801 acpi_rescan(device_t self, const char *ifattr, const int *locators) 802 { 803 struct acpi_softc *sc = device_private(self); 804 struct acpi_attach_args aa; 805 806 /* 807 * Try to attach hpet(4) first via a specific table. 808 */ 809 aa.aa_memt = sc->sc_memt; 810 811 if (ifattr_match(ifattr, "acpihpetbus") && sc->sc_hpet == NULL) 812 sc->sc_hpet = config_found_ia(sc->sc_dev, 813 "acpihpetbus", &aa, NULL); 814 815 /* 816 * A two-pass scan for acpinodebus. 817 */ 818 if (ifattr_match(ifattr, "acpinodebus")) { 819 acpi_rescan_early(sc); 820 acpi_rescan_nodes(sc); 821 } 822 823 /* 824 * Attach APM emulation and acpiwdrt(4). 825 */ 826 if (ifattr_match(ifattr, "acpiapmbus") && sc->sc_apmbus == NULL) 827 sc->sc_apmbus = config_found_ia(sc->sc_dev, 828 "acpiapmbus", NULL, NULL); 829 830 if (ifattr_match(ifattr, "acpiwdrtbus") && sc->sc_wdrt == NULL) 831 sc->sc_wdrt = config_found_ia(sc->sc_dev, 832 "acpiwdrtbus", NULL, NULL); 833 834 return 0; 835 } 836 837 static void 838 acpi_rescan_early(struct acpi_softc *sc) 839 { 840 struct acpi_attach_args aa; 841 struct acpi_devnode *ad; 842 843 /* 844 * First scan for devices such as acpiec(4) that 845 * should be always attached before anything else. 846 * We want these devices to attach regardless of 847 * the device status and other restrictions. 848 */ 849 SIMPLEQ_FOREACH(ad, &sc->ad_head, ad_list) { 850 851 if (ad->ad_device != NULL) 852 continue; 853 854 if (ad->ad_devinfo->Type != ACPI_TYPE_DEVICE) 855 continue; 856 857 if (acpi_match_hid(ad->ad_devinfo, acpi_early_ids) == 0) 858 continue; 859 860 aa.aa_node = ad; 861 aa.aa_iot = sc->sc_iot; 862 aa.aa_memt = sc->sc_memt; 863 aa.aa_pc = sc->sc_pc; 864 aa.aa_pciflags = sc->sc_pciflags; 865 aa.aa_ic = sc->sc_ic; 866 aa.aa_dmat = sc->sc_dmat; 867 aa.aa_dmat64 = sc->sc_dmat64; 868 869 ad->ad_device = config_found_ia(sc->sc_dev, 870 "acpinodebus", &aa, acpi_print); 871 } 872 } 873 874 static void 875 acpi_rescan_nodes(struct acpi_softc *sc) 876 { 877 const char * const hpet_ids[] = { "PNP0103", NULL }; 878 struct acpi_attach_args aa; 879 struct acpi_devnode *ad; 880 ACPI_DEVICE_INFO *di; 881 882 SIMPLEQ_FOREACH(ad, &sc->ad_head, ad_list) { 883 884 if (ad->ad_device != NULL) 885 continue; 886 887 /* 888 * There is a bug in ACPICA: it defines the type 889 * of the scopes incorrectly for its own reasons. 890 */ 891 if (acpi_is_scope(ad) != false) 892 continue; 893 894 di = ad->ad_devinfo; 895 896 /* 897 * We only attach devices which are present, enabled, and 898 * functioning properly. However, if a device is enabled, 899 * it is decoding resources and we should claim these, 900 * if possible. This requires changes to bus_space(9). 901 * Note: there is a possible race condition, because _STA 902 * may have changed since di->CurrentStatus was set. 903 */ 904 if (di->Type == ACPI_TYPE_DEVICE) { 905 906 if ((di->Valid & ACPI_VALID_STA) != 0 && 907 (di->CurrentStatus & ACPI_STA_OK) != ACPI_STA_OK) 908 continue; 909 } 910 911 if (di->Type == ACPI_TYPE_POWER) 912 continue; 913 914 if (di->Type == ACPI_TYPE_PROCESSOR) 915 continue; 916 917 if (acpi_match_hid(di, acpi_early_ids) != 0) 918 continue; 919 920 if (acpi_match_hid(di, acpi_ignored_ids) != 0) 921 continue; 922 923 if (acpi_match_hid(di, hpet_ids) != 0 && sc->sc_hpet != NULL) 924 continue; 925 926 aa.aa_node = ad; 927 aa.aa_iot = sc->sc_iot; 928 aa.aa_memt = sc->sc_memt; 929 aa.aa_pc = sc->sc_pc; 930 aa.aa_pciflags = sc->sc_pciflags; 931 aa.aa_ic = sc->sc_ic; 932 aa.aa_dmat = sc->sc_dmat; 933 aa.aa_dmat64 = sc->sc_dmat64; 934 935 ad->ad_device = config_found_ia(sc->sc_dev, 936 "acpinodebus", &aa, acpi_print); 937 } 938 } 939 940 static void 941 acpi_rescan_capabilities(device_t self) 942 { 943 struct acpi_softc *sc = device_private(self); 944 struct acpi_devnode *ad; 945 ACPI_HANDLE tmp; 946 ACPI_STATUS rv; 947 948 SIMPLEQ_FOREACH(ad, &sc->ad_head, ad_list) { 949 950 if (ad->ad_devinfo->Type != ACPI_TYPE_DEVICE) 951 continue; 952 953 /* 954 * Scan power resource capabilities. 955 * 956 * If any power states are supported, 957 * at least _PR0 and _PR3 must be present. 958 */ 959 rv = AcpiGetHandle(ad->ad_handle, "_PR0", &tmp); 960 961 if (ACPI_SUCCESS(rv)) { 962 ad->ad_flags |= ACPI_DEVICE_POWER; 963 acpi_power_add(ad); 964 } 965 966 /* 967 * Scan wake-up capabilities. 968 */ 969 if (ad->ad_wakedev != NULL) { 970 ad->ad_flags |= ACPI_DEVICE_WAKEUP; 971 acpi_wakedev_add(ad); 972 } 973 974 /* 975 * Scan docking stations. 976 */ 977 rv = AcpiGetHandle(ad->ad_handle, "_DCK", &tmp); 978 979 if (ACPI_SUCCESS(rv)) 980 ad->ad_flags |= ACPI_DEVICE_DOCK; 981 982 /* 983 * Scan devices that are ejectable. 984 */ 985 rv = AcpiGetHandle(ad->ad_handle, "_EJ0", &tmp); 986 987 if (ACPI_SUCCESS(rv)) 988 ad->ad_flags |= ACPI_DEVICE_EJECT; 989 } 990 } 991 992 static int 993 acpi_print(void *aux, const char *pnp) 994 { 995 struct acpi_attach_args *aa = aux; 996 struct acpi_devnode *ad; 997 const char *hid, *uid; 998 ACPI_DEVICE_INFO *di; 999 1000 ad = aa->aa_node; 1001 di = ad->ad_devinfo; 1002 1003 hid = di->HardwareId.String; 1004 uid = di->UniqueId.String; 1005 1006 if (pnp != NULL) { 1007 1008 if (di->Type != ACPI_TYPE_DEVICE) { 1009 1010 aprint_normal("%s (ACPI Object Type '%s') at %s", 1011 ad->ad_name, AcpiUtGetTypeName(ad->ad_type), pnp); 1012 1013 return UNCONF; 1014 } 1015 1016 if ((di->Valid & ACPI_VALID_HID) == 0 || hid == NULL) 1017 return 0; 1018 1019 aprint_normal("%s (%s) ", ad->ad_name, hid); 1020 acpi_print_dev(hid); 1021 aprint_normal("at %s", pnp); 1022 1023 return UNCONF; 1024 } 1025 1026 aprint_normal(" (%s", ad->ad_name); 1027 1028 if ((di->Valid & ACPI_VALID_HID) != 0 && hid != NULL) { 1029 1030 aprint_normal(", %s", hid); 1031 1032 if ((di->Valid & ACPI_VALID_UID) != 0 && uid != NULL) { 1033 1034 if (uid[0] == '\0') 1035 uid = "<null>"; 1036 1037 aprint_normal("-%s", uid); 1038 } 1039 } 1040 1041 aprint_normal(")"); 1042 1043 return UNCONF; 1044 } 1045 1046 /* 1047 * Notify. 1048 */ 1049 static void 1050 acpi_notify_handler(ACPI_HANDLE handle, uint32_t event, void *aux) 1051 { 1052 struct acpi_softc *sc = acpi_softc; 1053 struct acpi_devnode *ad; 1054 1055 KASSERT(sc != NULL); 1056 KASSERT(aux == NULL); 1057 KASSERT(acpi_active != 0); 1058 1059 if (acpi_suspended != 0) 1060 return; 1061 1062 /* 1063 * System: 0x00 - 0x7F. 1064 * Device: 0x80 - 0xFF. 1065 */ 1066 switch (event) { 1067 1068 case ACPI_NOTIFY_BUS_CHECK: 1069 case ACPI_NOTIFY_DEVICE_CHECK: 1070 case ACPI_NOTIFY_DEVICE_WAKE: 1071 case ACPI_NOTIFY_EJECT_REQUEST: 1072 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: 1073 case ACPI_NOTIFY_FREQUENCY_MISMATCH: 1074 case ACPI_NOTIFY_BUS_MODE_MISMATCH: 1075 case ACPI_NOTIFY_POWER_FAULT: 1076 case ACPI_NOTIFY_CAPABILITIES_CHECK: 1077 case ACPI_NOTIFY_DEVICE_PLD_CHECK: 1078 case ACPI_NOTIFY_RESERVED: 1079 case ACPI_NOTIFY_LOCALITY_UPDATE: 1080 break; 1081 } 1082 1083 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "notification 0x%02X for " 1084 "%s (%p)\n", event, acpi_name(handle), handle)); 1085 1086 /* 1087 * We deliver notifications only to drivers 1088 * that have been successfully attached and 1089 * that have registered a handler with us. 1090 * The opaque pointer is always the device_t. 1091 */ 1092 SIMPLEQ_FOREACH(ad, &sc->ad_head, ad_list) { 1093 1094 if (ad->ad_device == NULL) 1095 continue; 1096 1097 if (ad->ad_notify == NULL) 1098 continue; 1099 1100 if (ad->ad_handle != handle) 1101 continue; 1102 1103 (*ad->ad_notify)(ad->ad_handle, event, ad->ad_device); 1104 1105 return; 1106 } 1107 1108 aprint_debug_dev(sc->sc_dev, "unhandled notify 0x%02X " 1109 "for %s (%p)\n", event, acpi_name(handle), handle); 1110 } 1111 1112 bool 1113 acpi_register_notify(struct acpi_devnode *ad, ACPI_NOTIFY_HANDLER notify) 1114 { 1115 struct acpi_softc *sc = acpi_softc; 1116 1117 KASSERT(sc != NULL); 1118 KASSERT(acpi_active != 0); 1119 1120 if (acpi_suspended != 0) 1121 goto fail; 1122 1123 if (ad == NULL || notify == NULL) 1124 goto fail; 1125 1126 ad->ad_notify = notify; 1127 1128 return true; 1129 1130 fail: 1131 aprint_error_dev(sc->sc_dev, "failed to register notify " 1132 "handler for %s (%p)\n", ad->ad_name, ad->ad_handle); 1133 1134 return false; 1135 } 1136 1137 void 1138 acpi_deregister_notify(struct acpi_devnode *ad) 1139 { 1140 1141 ad->ad_notify = NULL; 1142 } 1143 1144 /* 1145 * Fixed buttons. 1146 */ 1147 static void 1148 acpi_register_fixed_button(struct acpi_softc *sc, int event) 1149 { 1150 struct sysmon_pswitch *smpsw; 1151 ACPI_STATUS rv; 1152 int type; 1153 1154 switch (event) { 1155 1156 case ACPI_EVENT_POWER_BUTTON: 1157 1158 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) != 0) 1159 return; 1160 1161 type = PSWITCH_TYPE_POWER; 1162 smpsw = &sc->sc_smpsw_power; 1163 break; 1164 1165 case ACPI_EVENT_SLEEP_BUTTON: 1166 1167 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) != 0) 1168 return; 1169 1170 type = PSWITCH_TYPE_SLEEP; 1171 smpsw = &sc->sc_smpsw_sleep; 1172 break; 1173 1174 default: 1175 rv = AE_TYPE; 1176 goto fail; 1177 } 1178 1179 smpsw->smpsw_type = type; 1180 smpsw->smpsw_name = device_xname(sc->sc_dev); 1181 1182 if (sysmon_pswitch_register(smpsw) != 0) { 1183 rv = AE_ERROR; 1184 goto fail; 1185 } 1186 1187 AcpiClearEvent(event); 1188 1189 rv = AcpiInstallFixedEventHandler(event, 1190 acpi_fixed_button_handler, smpsw); 1191 1192 if (ACPI_FAILURE(rv)) { 1193 sysmon_pswitch_unregister(smpsw); 1194 goto fail; 1195 } 1196 1197 aprint_debug_dev(sc->sc_dev, "fixed %s button present\n", 1198 (type != ACPI_EVENT_SLEEP_BUTTON) ? "power" : "sleep"); 1199 1200 return; 1201 1202 fail: 1203 aprint_error_dev(sc->sc_dev, "failed to register " 1204 "fixed event %d: %s\n", event, AcpiFormatException(rv)); 1205 } 1206 1207 static void 1208 acpi_deregister_fixed_button(struct acpi_softc *sc, int event) 1209 { 1210 struct sysmon_pswitch *smpsw; 1211 ACPI_STATUS rv; 1212 1213 switch (event) { 1214 1215 case ACPI_EVENT_POWER_BUTTON: 1216 smpsw = &sc->sc_smpsw_power; 1217 1218 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) != 0) { 1219 KASSERT(smpsw->smpsw_type != PSWITCH_TYPE_POWER); 1220 return; 1221 } 1222 1223 break; 1224 1225 case ACPI_EVENT_SLEEP_BUTTON: 1226 smpsw = &sc->sc_smpsw_sleep; 1227 1228 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) != 0) { 1229 KASSERT(smpsw->smpsw_type != PSWITCH_TYPE_SLEEP); 1230 return; 1231 } 1232 1233 break; 1234 1235 default: 1236 rv = AE_TYPE; 1237 goto fail; 1238 } 1239 1240 rv = AcpiRemoveFixedEventHandler(event, acpi_fixed_button_handler); 1241 1242 if (ACPI_SUCCESS(rv)) { 1243 sysmon_pswitch_unregister(smpsw); 1244 return; 1245 } 1246 1247 fail: 1248 aprint_error_dev(sc->sc_dev, "failed to deregister " 1249 "fixed event: %s\n", AcpiFormatException(rv)); 1250 } 1251 1252 static uint32_t 1253 acpi_fixed_button_handler(void *context) 1254 { 1255 static const int handler = OSL_NOTIFY_HANDLER; 1256 struct sysmon_pswitch *smpsw = context; 1257 1258 (void)AcpiOsExecute(handler, acpi_fixed_button_pressed, smpsw); 1259 1260 return ACPI_INTERRUPT_HANDLED; 1261 } 1262 1263 static void 1264 acpi_fixed_button_pressed(void *context) 1265 { 1266 struct sysmon_pswitch *smpsw = context; 1267 1268 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s fixed button pressed\n", 1269 (smpsw->smpsw_type != ACPI_EVENT_SLEEP_BUTTON) ? 1270 "power" : "sleep")); 1271 1272 sysmon_pswitch_event(smpsw, PSWITCH_EVENT_PRESSED); 1273 } 1274 1275 /* 1276 * Sleep. 1277 */ 1278 static void 1279 acpi_sleep_init(struct acpi_softc *sc) 1280 { 1281 uint8_t a, b, i; 1282 ACPI_STATUS rv; 1283 1284 CTASSERT(ACPI_STATE_S0 == 0 && ACPI_STATE_S1 == 1); 1285 CTASSERT(ACPI_STATE_S2 == 2 && ACPI_STATE_S3 == 3); 1286 CTASSERT(ACPI_STATE_S4 == 4 && ACPI_STATE_S5 == 5); 1287 1288 /* 1289 * Evaluate supported sleep states. 1290 */ 1291 for (i = ACPI_STATE_S0; i <= ACPI_STATE_S5; i++) { 1292 1293 rv = AcpiGetSleepTypeData(i, &a, &b); 1294 1295 if (ACPI_SUCCESS(rv)) 1296 sc->sc_sleepstates |= __BIT(i); 1297 } 1298 } 1299 1300 /* 1301 * Must be called with interrupts enabled. 1302 */ 1303 void 1304 acpi_enter_sleep_state(int state) 1305 { 1306 struct acpi_softc *sc = acpi_softc; 1307 ACPI_STATUS rv; 1308 1309 if (acpi_softc == NULL) 1310 return; 1311 1312 if (state == sc->sc_sleepstate) 1313 return; 1314 1315 if (state < ACPI_STATE_S0 || state > ACPI_STATE_S5) 1316 return; 1317 1318 aprint_normal_dev(sc->sc_dev, "entering state S%d\n", state); 1319 1320 switch (state) { 1321 1322 case ACPI_STATE_S0: 1323 sc->sc_sleepstate = ACPI_STATE_S0; 1324 return; 1325 1326 case ACPI_STATE_S1: 1327 case ACPI_STATE_S2: 1328 case ACPI_STATE_S3: 1329 case ACPI_STATE_S4: 1330 1331 if ((sc->sc_sleepstates & __BIT(state)) == 0) { 1332 aprint_error_dev(sc->sc_dev, "sleep state " 1333 "S%d is not available\n", state); 1334 return; 1335 } 1336 1337 /* 1338 * Evaluate the _TTS method. This should be done before 1339 * pmf_system_suspend(9) and the evaluation of _PTS. 1340 * We should also re-evaluate this once we return to 1341 * S0 or if we abort the sleep state transition in the 1342 * middle (see ACPI 3.0, section 7.3.6). In reality, 1343 * however, the _TTS method is seldom seen in the field. 1344 */ 1345 rv = acpi_eval_set_integer(NULL, "\\_TTS", state); 1346 1347 if (ACPI_SUCCESS(rv)) 1348 aprint_debug_dev(sc->sc_dev, "evaluated _TTS\n"); 1349 1350 if (state != ACPI_STATE_S1 && 1351 pmf_system_suspend(PMF_Q_NONE) != true) { 1352 aprint_error_dev(sc->sc_dev, "aborting suspend\n"); 1353 break; 1354 } 1355 1356 /* 1357 * This will evaluate the _PTS and _SST methods, 1358 * but unlike the documentation claims, not _GTS, 1359 * which is evaluated in AcpiEnterSleepState(). 1360 * This must be called with interrupts enabled. 1361 */ 1362 rv = AcpiEnterSleepStatePrep(state); 1363 1364 if (ACPI_FAILURE(rv)) { 1365 aprint_error_dev(sc->sc_dev, "failed to prepare " 1366 "S%d: %s\n", state, AcpiFormatException(rv)); 1367 break; 1368 } 1369 1370 /* 1371 * After the _PTS method has been evaluated, we can 1372 * enable wake and evaluate _PSW (ACPI 4.0, p. 284). 1373 */ 1374 acpi_wakedev_commit(sc, state); 1375 1376 sc->sc_sleepstate = state; 1377 1378 if (state == ACPI_STATE_S1) { 1379 1380 /* 1381 * Before the transition to S1, CPU caches 1382 * must be flushed (see ACPI 4.0, 7.3.4.2). 1383 * 1384 * Note that interrupts must be off before 1385 * calling AcpiEnterSleepState(). Conversely, 1386 * AcpiLeaveSleepState() should always be 1387 * called with interrupts enabled. 1388 */ 1389 acpi_md_OsDisableInterrupt(); 1390 1391 ACPI_FLUSH_CPU_CACHE(); 1392 rv = AcpiEnterSleepState(state); 1393 1394 if (ACPI_FAILURE(rv)) 1395 aprint_error_dev(sc->sc_dev, "failed to " 1396 "enter S1: %s\n", AcpiFormatException(rv)); 1397 1398 /* 1399 * Clear fixed events and disable all GPEs before 1400 * interrupts are enabled. 1401 */ 1402 AcpiClearEvent(ACPI_EVENT_PMTIMER); 1403 AcpiClearEvent(ACPI_EVENT_GLOBAL); 1404 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1405 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1406 AcpiClearEvent(ACPI_EVENT_RTC); 1407 AcpiHwDisableAllGpes(); 1408 1409 acpi_md_OsEnableInterrupt(); 1410 rv = AcpiLeaveSleepState(state); 1411 1412 } else { 1413 1414 (void)acpi_md_sleep(state); 1415 1416 if (state == ACPI_STATE_S4) 1417 AcpiEnable(); 1418 1419 (void)pmf_system_bus_resume(PMF_Q_NONE); 1420 (void)AcpiLeaveSleepState(state); 1421 (void)AcpiSetFirmwareWakingVector(0, 0); 1422 (void)pmf_system_resume(PMF_Q_NONE); 1423 } 1424 1425 /* 1426 * No wake GPEs should be enabled at runtime. 1427 */ 1428 acpi_wakedev_commit(sc, ACPI_STATE_S0); 1429 break; 1430 1431 case ACPI_STATE_S5: 1432 1433 (void)acpi_eval_set_integer(NULL, "\\_TTS", ACPI_STATE_S5); 1434 1435 rv = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1436 1437 if (ACPI_FAILURE(rv)) { 1438 aprint_error_dev(sc->sc_dev, "failed to prepare " 1439 "S%d: %s\n", state, AcpiFormatException(rv)); 1440 break; 1441 } 1442 1443 (void)AcpiDisableAllGpes(); 1444 1445 DELAY(1000000); 1446 1447 sc->sc_sleepstate = state; 1448 acpi_md_OsDisableInterrupt(); 1449 1450 (void)AcpiEnterSleepState(ACPI_STATE_S5); 1451 1452 aprint_error_dev(sc->sc_dev, "WARNING: powerdown failed!\n"); 1453 1454 break; 1455 } 1456 1457 sc->sc_sleepstate = ACPI_STATE_S0; 1458 1459 (void)acpi_eval_set_integer(NULL, "\\_TTS", ACPI_STATE_S0); 1460 } 1461 1462 /* 1463 * Sysctl. 1464 */ 1465 SYSCTL_SETUP(sysctl_acpi_setup, "sysctl hw.acpi subtree setup") 1466 { 1467 const struct sysctlnode *rnode, *snode; 1468 int err; 1469 1470 err = sysctl_createv(clog, 0, NULL, &rnode, 1471 CTLFLAG_PERMANENT, CTLTYPE_NODE, 1472 "acpi", SYSCTL_DESCR("ACPI subsystem parameters"), 1473 NULL, 0, NULL, 0, 1474 CTL_HW, CTL_CREATE, CTL_EOL); 1475 1476 if (err != 0) 1477 return; 1478 1479 (void)sysctl_createv(NULL, 0, &rnode, NULL, 1480 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD, 1481 "root", SYSCTL_DESCR("ACPI root pointer"), 1482 NULL, 0, &acpi_root_pointer, sizeof(acpi_root_pointer), 1483 CTL_CREATE, CTL_EOL); 1484 1485 err = sysctl_createv(clog, 0, &rnode, &snode, 1486 CTLFLAG_PERMANENT, CTLTYPE_NODE, 1487 "sleep", SYSCTL_DESCR("ACPI sleep"), 1488 NULL, 0, NULL, 0, 1489 CTL_CREATE, CTL_EOL); 1490 1491 if (err != 0) 1492 return; 1493 1494 (void)sysctl_createv(NULL, 0, &snode, NULL, 1495 CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT, 1496 "state", SYSCTL_DESCR("System sleep state"), 1497 sysctl_hw_acpi_sleepstate, 0, NULL, 0, 1498 CTL_CREATE, CTL_EOL); 1499 1500 (void)sysctl_createv(NULL, 0, &snode, NULL, 1501 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_STRING, 1502 "states", SYSCTL_DESCR("Supported sleep states"), 1503 sysctl_hw_acpi_sleepstates, 0, NULL, 0, 1504 CTL_CREATE, CTL_EOL); 1505 1506 err = sysctl_createv(clog, 0, &rnode, &rnode, 1507 CTLFLAG_PERMANENT, CTLTYPE_NODE, 1508 "stat", SYSCTL_DESCR("ACPI statistics"), 1509 NULL, 0, NULL, 0, 1510 CTL_CREATE, CTL_EOL); 1511 1512 if (err != 0) 1513 return; 1514 1515 (void)sysctl_createv(clog, 0, &rnode, NULL, 1516 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD, 1517 "gpe", SYSCTL_DESCR("Number of dispatched GPEs"), 1518 NULL, 0, &AcpiGpeCount, sizeof(AcpiGpeCount), 1519 CTL_CREATE, CTL_EOL); 1520 1521 (void)sysctl_createv(clog, 0, &rnode, NULL, 1522 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD, 1523 "sci", SYSCTL_DESCR("Number of SCI interrupts"), 1524 NULL, 0, &AcpiSciCount, sizeof(AcpiSciCount), 1525 CTL_CREATE, CTL_EOL); 1526 1527 (void)sysctl_createv(clog, 0, &rnode, NULL, 1528 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD, 1529 "fixed", SYSCTL_DESCR("Number of fixed events"), 1530 sysctl_hw_acpi_fixedstats, 0, NULL, 0, 1531 CTL_CREATE, CTL_EOL); 1532 1533 (void)sysctl_createv(clog, 0, &rnode, NULL, 1534 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD, 1535 "method", SYSCTL_DESCR("Number of methods executed"), 1536 NULL, 0, &AcpiMethodCount, sizeof(AcpiMethodCount), 1537 CTL_CREATE, CTL_EOL); 1538 1539 CTASSERT(sizeof(AcpiGpeCount) == sizeof(uint64_t)); 1540 CTASSERT(sizeof(AcpiSciCount) == sizeof(uint64_t)); 1541 } 1542 1543 static int 1544 sysctl_hw_acpi_fixedstats(SYSCTLFN_ARGS) 1545 { 1546 struct sysctlnode node; 1547 uint64_t t; 1548 int err, i; 1549 1550 for (i = t = 0; i < __arraycount(AcpiFixedEventCount); i++) 1551 t += AcpiFixedEventCount[i]; 1552 1553 node = *rnode; 1554 node.sysctl_data = &t; 1555 1556 err = sysctl_lookup(SYSCTLFN_CALL(&node)); 1557 1558 if (err || newp == NULL) 1559 return err; 1560 1561 return 0; 1562 } 1563 1564 static int 1565 sysctl_hw_acpi_sleepstate(SYSCTLFN_ARGS) 1566 { 1567 struct acpi_softc *sc = acpi_softc; 1568 struct sysctlnode node; 1569 int err, t; 1570 1571 if (acpi_softc == NULL) 1572 return ENOSYS; 1573 1574 node = *rnode; 1575 t = sc->sc_sleepstate; 1576 node.sysctl_data = &t; 1577 1578 err = sysctl_lookup(SYSCTLFN_CALL(&node)); 1579 1580 if (err || newp == NULL) 1581 return err; 1582 1583 if (t < ACPI_STATE_S0 || t > ACPI_STATE_S5) 1584 return EINVAL; 1585 1586 acpi_enter_sleep_state(t); 1587 1588 return 0; 1589 } 1590 1591 static int 1592 sysctl_hw_acpi_sleepstates(SYSCTLFN_ARGS) 1593 { 1594 struct acpi_softc *sc = acpi_softc; 1595 struct sysctlnode node; 1596 char t[3 * 6 + 1]; 1597 int err; 1598 1599 if (acpi_softc == NULL) 1600 return ENOSYS; 1601 1602 (void)memset(t, '\0', sizeof(t)); 1603 1604 (void)snprintf(t, sizeof(t), "%s%s%s%s%s%s", 1605 ((sc->sc_sleepstates & __BIT(0)) != 0) ? "S0 " : "", 1606 ((sc->sc_sleepstates & __BIT(1)) != 0) ? "S1 " : "", 1607 ((sc->sc_sleepstates & __BIT(2)) != 0) ? "S2 " : "", 1608 ((sc->sc_sleepstates & __BIT(3)) != 0) ? "S3 " : "", 1609 ((sc->sc_sleepstates & __BIT(4)) != 0) ? "S4 " : "", 1610 ((sc->sc_sleepstates & __BIT(5)) != 0) ? "S5 " : ""); 1611 1612 node = *rnode; 1613 node.sysctl_data = &t; 1614 1615 err = sysctl_lookup(SYSCTLFN_CALL(&node)); 1616 1617 if (err || newp == NULL) 1618 return err; 1619 1620 return 0; 1621 } 1622 1623 /* 1624 * Tables. 1625 */ 1626 ACPI_PHYSICAL_ADDRESS 1627 acpi_OsGetRootPointer(void) 1628 { 1629 ACPI_PHYSICAL_ADDRESS PhysicalAddress; 1630 1631 /* 1632 * We let MD code handle this since there are multiple ways to do it: 1633 * 1634 * IA-32: Use AcpiFindRootPointer() to locate the RSDP. 1635 * 1636 * IA-64: Use the EFI. 1637 */ 1638 PhysicalAddress = acpi_md_OsGetRootPointer(); 1639 1640 if (acpi_root_pointer == 0) 1641 acpi_root_pointer = PhysicalAddress; 1642 1643 return PhysicalAddress; 1644 } 1645 1646 static ACPI_TABLE_HEADER * 1647 acpi_map_rsdt(void) 1648 { 1649 ACPI_PHYSICAL_ADDRESS paddr; 1650 ACPI_TABLE_RSDP *rsdp; 1651 1652 paddr = AcpiOsGetRootPointer(); 1653 1654 if (paddr == 0) 1655 return NULL; 1656 1657 rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP)); 1658 1659 if (rsdp == NULL) 1660 return NULL; 1661 1662 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress) 1663 paddr = rsdp->XsdtPhysicalAddress; 1664 else 1665 paddr = rsdp->RsdtPhysicalAddress; 1666 1667 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 1668 1669 return AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER)); 1670 } 1671 1672 /* 1673 * XXX: Refactor to be a generic function that unmaps tables. 1674 */ 1675 static void 1676 acpi_unmap_rsdt(ACPI_TABLE_HEADER *rsdt) 1677 { 1678 1679 if (rsdt == NULL) 1680 return; 1681 1682 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 1683 } 1684 1685 /* 1686 * XXX: Refactor to be a generic function that maps tables. 1687 */ 1688 ACPI_STATUS 1689 acpi_madt_map(void) 1690 { 1691 ACPI_STATUS rv; 1692 1693 if (madt_header != NULL) 1694 return AE_ALREADY_EXISTS; 1695 1696 rv = AcpiGetTable(ACPI_SIG_MADT, 1, &madt_header); 1697 1698 if (ACPI_FAILURE(rv)) 1699 return rv; 1700 1701 return AE_OK; 1702 } 1703 1704 void 1705 acpi_madt_unmap(void) 1706 { 1707 madt_header = NULL; 1708 } 1709 1710 /* 1711 * XXX: Refactor to be a generic function that walks tables. 1712 */ 1713 void 1714 acpi_madt_walk(ACPI_STATUS (*func)(ACPI_SUBTABLE_HEADER *, void *), void *aux) 1715 { 1716 ACPI_SUBTABLE_HEADER *hdrp; 1717 char *madtend, *where; 1718 1719 madtend = (char *)madt_header + madt_header->Length; 1720 where = (char *)madt_header + sizeof (ACPI_TABLE_MADT); 1721 1722 while (where < madtend) { 1723 1724 hdrp = (ACPI_SUBTABLE_HEADER *)where; 1725 1726 if (ACPI_FAILURE(func(hdrp, aux))) 1727 break; 1728 1729 where += hdrp->Length; 1730 } 1731 } 1732 1733 /* 1734 * Miscellaneous. 1735 */ 1736 static bool 1737 acpi_is_scope(struct acpi_devnode *ad) 1738 { 1739 int i; 1740 1741 /* 1742 * Return true if the node is a root scope. 1743 */ 1744 if (ad->ad_parent == NULL) 1745 return false; 1746 1747 if (ad->ad_parent->ad_handle != ACPI_ROOT_OBJECT) 1748 return false; 1749 1750 for (i = 0; i < __arraycount(acpi_scopes); i++) { 1751 1752 if (acpi_scopes[i] == NULL) 1753 continue; 1754 1755 if (ad->ad_handle == acpi_scopes[i]) 1756 return true; 1757 } 1758 1759 return false; 1760 } 1761 1762 /* 1763 * ACPIVERBOSE. 1764 */ 1765 void 1766 acpi_load_verbose(void) 1767 { 1768 1769 if (acpi_verbose_loaded == 0) 1770 module_autoload("acpiverbose", MODULE_CLASS_MISC); 1771 } 1772 1773 void 1774 acpi_print_verbose_stub(struct acpi_softc *sc) 1775 { 1776 1777 acpi_load_verbose(); 1778 1779 if (acpi_verbose_loaded != 0) 1780 acpi_print_verbose(sc); 1781 } 1782 1783 void 1784 acpi_print_dev_stub(const char *pnpstr) 1785 { 1786 1787 acpi_load_verbose(); 1788 1789 if (acpi_verbose_loaded != 0) 1790 acpi_print_dev(pnpstr); 1791 } 1792 1793 MALLOC_DECLARE(M_ACPI); /* XXX: ACPI_ACTIVATE_DEV should use kmem(9). */ 1794 1795 /* 1796 * ACPI_ACTIVATE_DEV. 1797 */ 1798 static void 1799 acpi_activate_device(ACPI_HANDLE handle, ACPI_DEVICE_INFO **di) 1800 { 1801 1802 #ifndef ACPI_ACTIVATE_DEV 1803 return; 1804 } 1805 #else 1806 static const int valid = ACPI_VALID_STA | ACPI_VALID_HID; 1807 ACPI_DEVICE_INFO *newdi; 1808 ACPI_STATUS rv; 1809 uint32_t old; 1810 1811 /* 1812 * If the device is valid and present, 1813 * but not enabled, try to activate it. 1814 */ 1815 if (((*di)->Valid & valid) != valid) 1816 return; 1817 1818 old = (*di)->CurrentStatus; 1819 1820 if ((old & (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED)) != 1821 ACPI_STA_DEVICE_PRESENT) 1822 return; 1823 1824 rv = acpi_allocate_resources(handle); 1825 1826 if (ACPI_FAILURE(rv)) 1827 goto fail; 1828 1829 rv = AcpiGetObjectInfo(handle, &newdi); 1830 1831 if (ACPI_FAILURE(rv)) 1832 goto fail; 1833 1834 ACPI_FREE(*di); 1835 *di = newdi; 1836 1837 aprint_verbose_dev(acpi_softc->sc_dev, 1838 "%s activated, STA 0x%08X -> STA 0x%08X\n", 1839 (*di)->HardwareId.String, old, (*di)->CurrentStatus); 1840 1841 return; 1842 1843 fail: 1844 aprint_error_dev(acpi_softc->sc_dev, "failed to " 1845 "activate %s\n", (*di)->HardwareId.String); 1846 } 1847 1848 /* 1849 * XXX: This very incomplete. 1850 */ 1851 ACPI_STATUS 1852 acpi_allocate_resources(ACPI_HANDLE handle) 1853 { 1854 ACPI_BUFFER bufp, bufc, bufn; 1855 ACPI_RESOURCE *resp, *resc, *resn; 1856 ACPI_RESOURCE_IRQ *irq; 1857 #if 0 1858 ACPI_RESOURCE_EXTENDED_IRQ *xirq; 1859 #endif 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 #if 0 1898 xirq = (ACPI_RESOURCE_EXTENDED_IRQ *)&resn->Data; 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