1 /* $NetBSD: acpi.c,v 1.303 2025/02/25 00:41:42 christos 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 1.303 2025/02/25 00:41:42 christos Exp $");
104
105 #include "pci.h"
106 #include "opt_acpi.h"
107 #include "opt_pcifixup.h"
108
109 #include <sys/param.h>
110 #include <sys/atomic.h>
111 #include <sys/device.h>
112 #include <sys/kernel.h>
113 #include <sys/kmem.h>
114 #include <sys/malloc.h>
115 #include <sys/module.h>
116 #include <sys/mutex.h>
117 #include <sys/sysctl.h>
118 #include <sys/systm.h>
119 #include <sys/timetc.h>
120
121 #include <dev/acpi/acpireg.h>
122 #include <dev/acpi/acpivar.h>
123 #include <dev/acpi/acpi_mcfg.h>
124 #include <dev/acpi/acpi_osd.h>
125 #include <dev/acpi/acpi_pci.h>
126 #include <dev/acpi/acpi_power.h>
127 #include <dev/acpi/acpi_timer.h>
128 #include <dev/acpi/acpi_wakedev.h>
129
130 #include <machine/acpi_machdep.h>
131
132 #include "ioconf.h"
133
134 #define _COMPONENT ACPI_BUS_COMPONENT
135 ACPI_MODULE_NAME ("acpi")
136
137 /*
138 * The acpi_active variable is set when the ACPI subsystem is active.
139 * Machine-dependent code may wish to skip other steps (such as attaching
140 * subsystems that ACPI supercedes) when ACPI is active.
141 */
142 int acpi_active = 0;
143 int acpi_suspended = 0;
144 int acpi_force_load = 0;
145 int acpi_verbose_loaded = 0;
146
147 struct acpi_softc *acpi_softc = NULL;
148 static uint64_t acpi_root_pointer;
149 extern kmutex_t acpi_interrupt_list_mtx;
150 static ACPI_HANDLE acpi_scopes[4];
151 ACPI_TABLE_HEADER *madt_header;
152 ACPI_TABLE_HEADER *gtdt_header;
153
154 /*
155 * This structure provides a context for the ACPI
156 * namespace walk performed in acpi_build_tree().
157 */
158 struct acpi_walkcontext {
159 struct acpi_softc *aw_sc;
160 struct acpi_devnode *aw_parent;
161 };
162
163 /*
164 * Ignored HIDs.
165 */
166 static const char * const acpi_ignored_ids[] = {
167 #if defined(i386) || defined(x86_64)
168 "ACPI0007", /* ACPI CPUs do not attach to acpi(4) */
169 "PNP0000", /* AT interrupt controller is handled internally */
170 "PNP0001", /* EISA interrupt controller is handled internally */
171 "PNP0200", /* AT DMA controller is handled internally */
172 "PNP0A??", /* PCI Busses are handled internally */
173 "PNP0B00", /* AT RTC is handled internally */
174 "PNP0C02", /* PnP motherboard resources */
175 "PNP0C0F", /* ACPI PCI link devices are handled internally */
176 #endif
177 #if defined(x86_64)
178 "PNP0C04", /* FPU is handled internally */
179 #endif
180 #if defined(__aarch64__)
181 "ACPI0004", /* ACPI module devices are handled internally */
182 "PNP0C0F", /* ACPI PCI link devices are handled internally */
183 #endif
184 NULL
185 };
186
187 /*
188 * Devices that should be attached early.
189 */
190 static const char * const acpi_early_ids[] = {
191 "PNP0C09", /* acpiec(4) */
192 NULL
193 };
194
195 static int acpi_match(device_t, cfdata_t, void *);
196 static int acpi_submatch(device_t, cfdata_t, const int *, void *);
197 static void acpi_attach(device_t, device_t, void *);
198 static int acpi_detach(device_t, int);
199 static void acpi_childdet(device_t, device_t);
200 static bool acpi_suspend(device_t, const pmf_qual_t *);
201 static bool acpi_resume(device_t, const pmf_qual_t *);
202
203 static void acpi_build_tree(struct acpi_softc *);
204 static void acpi_find_deps(struct acpi_softc *);
205 static void acpi_config_tree(struct acpi_softc *);
206 static void acpi_config_dma(struct acpi_softc *);
207 static ACPI_STATUS acpi_make_devnode(ACPI_HANDLE, uint32_t,
208 void *, void **);
209 static ACPI_STATUS acpi_make_devnode_post(ACPI_HANDLE, uint32_t,
210 void *, void **);
211 static void acpi_make_name(struct acpi_devnode *, uint32_t);
212
213 static int acpi_rescan(device_t, const char *, const int *);
214 static void acpi_rescan_early(struct acpi_softc *);
215 static void acpi_rescan_nodes(struct acpi_softc *);
216 static void acpi_rescan_capabilities(device_t);
217 static int acpi_print(void *aux, const char *);
218
219 static void acpi_notify_handler(ACPI_HANDLE, uint32_t, void *);
220
221 static void acpi_register_fixed_button(struct acpi_softc *, int);
222 static void acpi_deregister_fixed_button(struct acpi_softc *, int);
223 static uint32_t acpi_fixed_button_handler(void *);
224 static void acpi_fixed_button_pressed(void *);
225
226 static void acpi_sleep_init(struct acpi_softc *);
227
228 static int sysctl_hw_acpi_fixedstats(SYSCTLFN_PROTO);
229 static int sysctl_hw_acpi_sleepstate(SYSCTLFN_PROTO);
230 static int sysctl_hw_acpi_sleepstates(SYSCTLFN_PROTO);
231
232 static bool acpi_is_scope(struct acpi_devnode *);
233 static ACPI_TABLE_HEADER *acpi_map_rsdt(void);
234 static void acpi_unmap_rsdt(ACPI_TABLE_HEADER *);
235
236 void acpi_print_verbose_stub(struct acpi_softc *);
237 void acpi_print_dev_stub(const char *);
238
239 static void acpi_activate_device(ACPI_HANDLE, ACPI_DEVICE_INFO **);
240 ACPI_STATUS acpi_allocate_resources(ACPI_HANDLE);
241
242 void (*acpi_print_verbose)(struct acpi_softc *) = acpi_print_verbose_stub;
243 void (*acpi_print_dev)(const char *) = acpi_print_dev_stub;
244
245 bus_dma_tag_t acpi_default_dma_tag(struct acpi_softc *, struct acpi_devnode *);
246 bus_dma_tag_t acpi_default_dma64_tag(struct acpi_softc *, struct acpi_devnode *);
247 pci_chipset_tag_t acpi_default_pci_chipset_tag(struct acpi_softc *, int, int);
248
249 CFATTACH_DECL2_NEW(acpi, sizeof(struct acpi_softc),
250 acpi_match, acpi_attach, acpi_detach, NULL, acpi_rescan, acpi_childdet);
251
252 /*
253 * Probe for ACPI support.
254 *
255 * This is called by the machine-dependent ACPI front-end.
256 * Note: this is not an autoconfiguration interface function.
257 */
258 int
acpi_probe(void)259 acpi_probe(void)
260 {
261 ACPI_TABLE_HEADER *rsdt;
262 ACPI_STATUS rv;
263 int quirks;
264
265 if (acpi_softc != NULL)
266 panic("%s: already probed", __func__);
267
268 mutex_init(&acpi_interrupt_list_mtx, MUTEX_DEFAULT, IPL_NONE);
269
270 /*
271 * Start up ACPICA.
272 */
273 AcpiGbl_EnableInterpreterSlack = true;
274
275 rv = AcpiInitializeSubsystem();
276
277 if (ACPI_FAILURE(rv)) {
278 aprint_error("%s: failed to initialize subsystem\n", __func__);
279 return 0;
280 }
281
282 /*
283 * Allocate space for RSDT/XSDT and DSDT,
284 * but allow resizing if more tables exist.
285 */
286 rv = AcpiInitializeTables(NULL, 2, true);
287
288 if (ACPI_FAILURE(rv)) {
289 aprint_error("%s: failed to initialize tables\n", __func__);
290 goto fail;
291 }
292
293 rv = AcpiLoadTables();
294
295 if (ACPI_FAILURE(rv)) {
296 aprint_error("%s: failed to load tables\n", __func__);
297 goto fail;
298 }
299
300 rsdt = acpi_map_rsdt();
301
302 if (rsdt == NULL) {
303 aprint_error("%s: failed to map RSDT\n", __func__);
304 goto fail;
305 }
306
307 quirks = acpi_find_quirks();
308
309 if (acpi_force_load == 0 && (quirks & ACPI_QUIRK_BROKEN) != 0) {
310
311 aprint_normal("ACPI: BIOS is listed as broken:\n");
312 aprint_normal("ACPI: X/RSDT: OemId <%6.6s,%8.8s,%08x>, "
313 "AslId <%4.4s,%08x>\n", rsdt->OemId, rsdt->OemTableId,
314 rsdt->OemRevision, rsdt->AslCompilerId,
315 rsdt->AslCompilerRevision);
316 aprint_normal("ACPI: Not used. Set acpi_force_load to use.\n");
317
318 acpi_unmap_rsdt(rsdt);
319 goto fail;
320 }
321
322 if (acpi_force_load == 0 && (quirks & ACPI_QUIRK_OLDBIOS) != 0) {
323
324 aprint_normal("ACPI: BIOS is too old (%s). "
325 "Set acpi_force_load to use.\n",
326 pmf_get_platform("bios-date"));
327
328 acpi_unmap_rsdt(rsdt);
329 goto fail;
330 }
331
332 acpi_unmap_rsdt(rsdt);
333
334 rv = AcpiEnableSubsystem(~(ACPI_NO_HARDWARE_INIT|ACPI_NO_ACPI_ENABLE));
335
336 if (ACPI_FAILURE(rv)) {
337 aprint_error("%s: failed to enable subsystem\n", __func__);
338 goto fail;
339 }
340
341 return 1;
342
343 fail:
344 (void)AcpiTerminate();
345
346 return 0;
347 }
348
349 void
acpi_disable(void)350 acpi_disable(void)
351 {
352
353 if (acpi_softc == NULL)
354 return;
355
356 KASSERT(acpi_active != 0);
357
358 if (AcpiGbl_FADT.SmiCommand != 0)
359 AcpiDisable();
360 }
361
362 int
acpi_check(device_t parent,const char * ifattr)363 acpi_check(device_t parent, const char *ifattr)
364 {
365 return config_search(parent, NULL,
366 CFARGS(.submatch = acpi_submatch,
367 .iattr = ifattr)) != NULL;
368 }
369
370 int
acpi_reset(void)371 acpi_reset(void)
372 {
373 struct acpi_softc *sc = acpi_softc;
374 ACPI_GENERIC_ADDRESS *ResetReg;
375 ACPI_PCI_ID PciId;
376 ACPI_STATUS status;
377
378 if (sc == NULL)
379 return ENXIO;
380
381 ResetReg = &AcpiGbl_FADT.ResetRegister;
382
383 /* Check if the reset register is supported */
384 if (!(AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) ||
385 !ResetReg->Address) {
386 return ENOENT;
387 }
388
389 switch (ResetReg->SpaceId) {
390 case ACPI_ADR_SPACE_PCI_CONFIG:
391 PciId.Segment = PciId.Bus = 0;
392 PciId.Device = ACPI_GAS_PCI_DEV(ResetReg->Address);
393 PciId.Function = ACPI_GAS_PCI_FUNC(ResetReg->Address);
394 status = AcpiOsWritePciConfiguration(&PciId,
395 ACPI_GAS_PCI_REGOFF(ResetReg->Address),
396 AcpiGbl_FADT.ResetValue, ResetReg->BitWidth);
397 break;
398 case ACPI_ADR_SPACE_SYSTEM_IO:
399 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
400 status = AcpiReset();
401 break;
402 default:
403 status = AE_TYPE;
404 break;
405 }
406
407 return ACPI_FAILURE(status) ? EIO : 0;
408 }
409
410 /*
411 * Autoconfiguration.
412 */
413 static int
acpi_match(device_t parent,cfdata_t match,void * aux)414 acpi_match(device_t parent, cfdata_t match, void *aux)
415 {
416 /*
417 * XXX: Nada; MD code has called acpi_probe().
418 */
419 return 1;
420 }
421
422 static int
acpi_submatch(device_t parent,cfdata_t cf,const int * locs,void * aux)423 acpi_submatch(device_t parent, cfdata_t cf, const int *locs, void *aux)
424 {
425 struct cfattach *ca;
426
427 ca = config_cfattach_lookup(cf->cf_name, cf->cf_atname);
428
429 return (ca == &acpi_ca);
430 }
431
432 static void
acpi_attach(device_t parent,device_t self,void * aux)433 acpi_attach(device_t parent, device_t self, void *aux)
434 {
435 struct acpi_softc *sc = device_private(self);
436 struct acpibus_attach_args *aa = aux;
437 ACPI_TABLE_HEADER *rsdt, *hdr;
438 ACPI_STATUS rv;
439 int i;
440
441 aprint_naive("\n");
442 aprint_normal(": Intel ACPICA %08x\n", ACPI_CA_VERSION);
443
444 if (acpi_softc != NULL)
445 panic("%s: already attached", __func__);
446
447 rsdt = acpi_map_rsdt();
448
449 if (rsdt == NULL)
450 aprint_error_dev(self, "X/RSDT: Not found\n");
451 else {
452 aprint_verbose_dev(self,
453 "X/RSDT: OemId <%6.6s,%8.8s,%08x>, AslId <%4.4s,%08x>\n",
454 rsdt->OemId, rsdt->OemTableId,
455 rsdt->OemRevision,
456 rsdt->AslCompilerId, rsdt->AslCompilerRevision);
457 }
458
459 acpi_unmap_rsdt(rsdt);
460
461 sc->sc_dev = self;
462 sc->sc_root = NULL;
463
464 sc->sc_sleepstate = ACPI_STATE_S0;
465 sc->sc_quirks = acpi_find_quirks();
466
467 sysmon_power_settype("acpi");
468
469 sc->sc_iot = aa->aa_iot;
470 sc->sc_memt = aa->aa_memt;
471 sc->sc_pciflags = aa->aa_pciflags;
472 sc->sc_ic = aa->aa_ic;
473 sc->sc_dmat = aa->aa_dmat;
474 sc->sc_dmat64 = aa->aa_dmat64;
475
476 SIMPLEQ_INIT(&sc->sc_head);
477
478 acpi_softc = sc;
479
480 if (pmf_device_register(self, acpi_suspend, acpi_resume) != true)
481 aprint_error_dev(self, "couldn't establish power handler\n");
482
483 /*
484 * Bring ACPICA on-line.
485 */
486
487 rv = AcpiEnableSubsystem(ACPI_FULL_INITIALIZATION);
488
489 if (ACPI_FAILURE(rv))
490 goto fail;
491
492 /*
493 * Early initialization of acpiec(4) via ECDT.
494 */
495 config_found(self, aa, NULL,
496 CFARGS(.iattr = "acpiecdtbus"));
497
498 rv = AcpiInitializeObjects(ACPI_FULL_INITIALIZATION);
499
500 if (ACPI_FAILURE(rv))
501 goto fail;
502
503 /*
504 * Scan the namespace and build our device tree.
505 */
506 acpi_build_tree(sc);
507
508 #if NPCI > 0
509 /*
510 * Probe MCFG table
511 */
512 acpimcfg_probe(sc);
513 #endif
514
515 acpi_md_callback(sc);
516
517 /*
518 * Early initialization of the _PDC control method
519 * that may load additional SSDT tables dynamically.
520 */
521 (void)acpi_md_pdc();
522
523 /*
524 * Install global notify handlers.
525 */
526 rv = AcpiInstallNotifyHandler(ACPI_ROOT_OBJECT,
527 ACPI_SYSTEM_NOTIFY, acpi_notify_handler, NULL);
528
529 if (ACPI_FAILURE(rv))
530 goto fail;
531
532 rv = AcpiInstallNotifyHandler(ACPI_ROOT_OBJECT,
533 ACPI_DEVICE_NOTIFY, acpi_notify_handler, NULL);
534
535 if (ACPI_FAILURE(rv))
536 goto fail;
537
538 acpi_active = 1;
539
540 if (!AcpiGbl_ReducedHardware) {
541 /* Show SCI interrupt. */
542 aprint_verbose_dev(self, "SCI interrupting at int %u\n",
543 AcpiGbl_FADT.SciInterrupt);
544
545 /*
546 * Install fixed-event handlers.
547 */
548 acpi_register_fixed_button(sc, ACPI_EVENT_POWER_BUTTON);
549 acpi_register_fixed_button(sc, ACPI_EVENT_SLEEP_BUTTON);
550 }
551
552 /*
553 * Load drivers that operate on System Description Tables.
554 */
555 for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i) {
556 rv = AcpiGetTableByIndex(i, &hdr);
557 if (ACPI_FAILURE(rv)) {
558 continue;
559 }
560 config_found(sc->sc_dev, hdr, NULL,
561 CFARGS(.iattr = "acpisdtbus"));
562 AcpiPutTable(hdr);
563 }
564
565 acpitimer_init(sc);
566 acpi_config_tree(sc);
567 acpi_sleep_init(sc);
568
569 #ifdef ACPI_DEBUG
570 acpi_debug_init();
571 #endif
572
573 /*
574 * Print debug information.
575 */
576 acpi_print_verbose(sc);
577
578 return;
579
580 fail:
581 aprint_error("%s: failed to initialize ACPI: %s\n",
582 __func__, AcpiFormatException(rv));
583 }
584
585 /*
586 * XXX: This is incomplete.
587 */
588 static int
acpi_detach(device_t self,int flags)589 acpi_detach(device_t self, int flags)
590 {
591 struct acpi_softc *sc = device_private(self);
592 ACPI_STATUS rv;
593 int rc;
594
595 rv = AcpiRemoveNotifyHandler(ACPI_ROOT_OBJECT,
596 ACPI_SYSTEM_NOTIFY, acpi_notify_handler);
597
598 if (ACPI_FAILURE(rv))
599 return EBUSY;
600
601 rv = AcpiRemoveNotifyHandler(ACPI_ROOT_OBJECT,
602 ACPI_DEVICE_NOTIFY, acpi_notify_handler);
603
604 if (ACPI_FAILURE(rv))
605 return EBUSY;
606
607 if ((rc = config_detach_children(self, flags)) != 0)
608 return rc;
609
610 if ((rc = acpitimer_detach()) != 0)
611 return rc;
612
613 if (!AcpiGbl_ReducedHardware) {
614 acpi_deregister_fixed_button(sc, ACPI_EVENT_POWER_BUTTON);
615 acpi_deregister_fixed_button(sc, ACPI_EVENT_SLEEP_BUTTON);
616 }
617
618 pmf_device_deregister(self);
619
620 acpi_softc = NULL;
621
622 return 0;
623 }
624
625 static void
acpi_childdet(device_t self,device_t child)626 acpi_childdet(device_t self, device_t child)
627 {
628 struct acpi_softc *sc = device_private(self);
629 struct acpi_devnode *ad;
630
631 if (sc->sc_apmbus == child)
632 sc->sc_apmbus = NULL;
633
634 if (sc->sc_hpet == child)
635 sc->sc_hpet = NULL;
636
637 if (sc->sc_wdrt == child)
638 sc->sc_wdrt = NULL;
639
640 if (sc->sc_apei == child)
641 sc->sc_apei = NULL;
642
643 SIMPLEQ_FOREACH(ad, &sc->sc_head, ad_list) {
644
645 if (ad->ad_device == child)
646 ad->ad_device = NULL;
647 }
648 }
649
650 static bool
acpi_suspend(device_t dv,const pmf_qual_t * qual)651 acpi_suspend(device_t dv, const pmf_qual_t *qual)
652 {
653
654 acpi_suspended = 1;
655
656 return true;
657 }
658
659 static bool
acpi_resume(device_t dv,const pmf_qual_t * qual)660 acpi_resume(device_t dv, const pmf_qual_t *qual)
661 {
662
663 acpi_suspended = 0;
664
665 return true;
666 }
667
668 /*
669 * Namespace scan.
670 */
671 static void
acpi_build_tree(struct acpi_softc * sc)672 acpi_build_tree(struct acpi_softc *sc)
673 {
674 struct acpi_walkcontext awc;
675
676 /*
677 * Get the root scope handles.
678 */
679 KASSERT(__arraycount(acpi_scopes) == 4);
680
681 (void)AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_PR_", &acpi_scopes[0]);
682 (void)AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &acpi_scopes[1]);
683 (void)AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SI_", &acpi_scopes[2]);
684 (void)AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_TZ_", &acpi_scopes[3]);
685
686 /*
687 * Make the root node.
688 */
689 awc.aw_sc = sc;
690 awc.aw_parent = NULL;
691
692 (void)acpi_make_devnode(ACPI_ROOT_OBJECT, 0, &awc, NULL);
693
694 KASSERT(sc->sc_root == NULL);
695 KASSERT(awc.aw_parent != NULL);
696
697 sc->sc_root = awc.aw_parent;
698
699 /*
700 * Build the internal namespace.
701 */
702 (void)AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, UINT32_MAX,
703 acpi_make_devnode, acpi_make_devnode_post, &awc, NULL);
704
705 /*
706 * Find device dependencies.
707 */
708 acpi_find_deps(sc);
709
710 #if NPCI > 0
711 /*
712 * Scan the internal namespace.
713 */
714 (void)acpi_pcidev_scan(sc->sc_root);
715 #endif
716 }
717
718 static void
acpi_add_dep(struct acpi_devnode * ad,struct acpi_devnode * depad)719 acpi_add_dep(struct acpi_devnode *ad, struct acpi_devnode *depad)
720 {
721 struct acpi_devnodedep *dd;
722
723 dd = kmem_alloc(sizeof(*dd), KM_SLEEP);
724 dd->dd_node = depad;
725 SIMPLEQ_INSERT_TAIL(&ad->ad_deps, dd, dd_list);
726 }
727
728 static void
acpi_find_deps(struct acpi_softc * sc)729 acpi_find_deps(struct acpi_softc *sc)
730 {
731 struct acpi_devnode *ad;
732
733 SIMPLEQ_FOREACH(ad, &sc->sc_head, ad_list) {
734 struct acpi_devnode *depad;
735 ACPI_OBJECT *obj;
736 ACPI_HANDLE _dep;
737 ACPI_BUFFER buf;
738 ACPI_STATUS rv;
739 u_int ref;
740
741 if (acpi_is_scope(ad) ||
742 ad->ad_parent == NULL ||
743 ad->ad_devinfo->Type != ACPI_TYPE_DEVICE) {
744 continue;
745 }
746
747 /* Add an implicit dependency on parent devices. */
748 if (!acpi_is_scope(ad->ad_parent) &&
749 ad->ad_parent->ad_devinfo->Type == ACPI_TYPE_DEVICE) {
750 acpi_add_dep(ad, ad->ad_parent);
751 }
752
753 rv = AcpiGetHandle(ad->ad_handle, "_DEP", &_dep);
754 if (ACPI_FAILURE(rv)) {
755 goto logit;
756 }
757
758 buf.Pointer = NULL;
759 buf.Length = ACPI_ALLOCATE_BUFFER;
760 rv = AcpiEvaluateObjectTyped(_dep, NULL, NULL, &buf,
761 ACPI_TYPE_PACKAGE);
762 if (ACPI_FAILURE(rv)) {
763 goto logit;
764 }
765 obj = buf.Pointer;
766
767 for (ref = 0; ref < obj->Package.Count; ref++) {
768 ACPI_OBJECT *robj = &obj->Package.Elements[ref];
769 ACPI_HANDLE rhdl;
770
771 rv = acpi_eval_reference_handle(robj, &rhdl);
772 if (ACPI_FAILURE(rv)) {
773 continue;
774 }
775
776 depad = acpi_match_node(rhdl);
777 if (depad != NULL) {
778 acpi_add_dep(ad, depad);
779 }
780 }
781
782 ACPI_FREE(buf.Pointer);
783
784 logit:
785 if (!SIMPLEQ_EMPTY(&ad->ad_deps)) {
786 struct acpi_devnodedep *dd;
787
788 aprint_debug_dev(sc->sc_dev, "%s dependencies:",
789 ad->ad_name);
790 SIMPLEQ_FOREACH(dd, &ad->ad_deps, dd_list) {
791 aprint_debug(" %s", dd->dd_node->ad_name);
792 }
793 aprint_debug("\n");
794 }
795 }
796 }
797
798 static void
acpi_config_tree(struct acpi_softc * sc)799 acpi_config_tree(struct acpi_softc *sc)
800 {
801 /*
802 * Assign bus_dma resources
803 */
804 acpi_config_dma(sc);
805
806 /*
807 * Configure all everything found "at acpi?".
808 */
809 (void)acpi_rescan(sc->sc_dev, NULL, NULL);
810
811 /*
812 * Update GPE information.
813 *
814 * Note that this must be called after
815 * all GPE handlers have been installed.
816 */
817 (void)AcpiUpdateAllGpes();
818
819 /*
820 * Defer rest of the configuration.
821 */
822 (void)config_defer(sc->sc_dev, acpi_rescan_capabilities);
823 }
824
825 // XXXNH?
826 static void
acpi_config_dma(struct acpi_softc * sc)827 acpi_config_dma(struct acpi_softc *sc)
828 {
829 struct acpi_devnode *ad;
830
831 SIMPLEQ_FOREACH(ad, &sc->sc_head, ad_list) {
832
833 if (ad->ad_device != NULL)
834 continue;
835
836 if (ad->ad_devinfo->Type != ACPI_TYPE_DEVICE)
837 continue;
838
839 ad->ad_dmat = acpi_get_dma_tag(sc, ad);
840 ad->ad_dmat64 = acpi_get_dma64_tag(sc, ad);
841 }
842 }
843
844 static ACPI_STATUS
acpi_make_devnode(ACPI_HANDLE handle,uint32_t level,void * context,void ** status)845 acpi_make_devnode(ACPI_HANDLE handle, uint32_t level,
846 void *context, void **status)
847 {
848 struct acpi_walkcontext *awc = context;
849 struct acpi_softc *sc = awc->aw_sc;
850 struct acpi_devnode *ad;
851 ACPI_DEVICE_INFO *devinfo;
852 ACPI_OBJECT_TYPE type;
853 ACPI_STATUS rv;
854
855 rv = AcpiGetObjectInfo(handle, &devinfo);
856
857 if (ACPI_FAILURE(rv))
858 return AE_OK; /* Do not terminate the walk. */
859
860 type = devinfo->Type;
861
862 switch (type) {
863
864 case ACPI_TYPE_DEVICE:
865 acpi_activate_device(handle, &devinfo);
866 /* FALLTHROUGH */
867
868 case ACPI_TYPE_PROCESSOR:
869 case ACPI_TYPE_THERMAL:
870 case ACPI_TYPE_POWER:
871
872 ad = kmem_zalloc(sizeof(*ad), KM_SLEEP);
873
874 ad->ad_device = NULL;
875 ad->ad_notify = NULL;
876 ad->ad_pciinfo = NULL;
877 ad->ad_wakedev = NULL;
878
879 ad->ad_type = type;
880 ad->ad_handle = handle;
881 ad->ad_devinfo = devinfo;
882
883 ad->ad_root = sc->sc_dev;
884 ad->ad_parent = awc->aw_parent;
885
886 acpi_match_node_init(ad);
887 acpi_make_name(ad, devinfo->Name);
888
889 /*
890 * Identify wake GPEs from the _PRW. Note that
891 * AcpiUpdateAllGpes() must be called afterwards.
892 */
893 if (ad->ad_devinfo->Type == ACPI_TYPE_DEVICE)
894 acpi_wakedev_init(ad);
895
896 SIMPLEQ_INIT(&ad->ad_child_head);
897 SIMPLEQ_INSERT_TAIL(&sc->sc_head, ad, ad_list);
898 SIMPLEQ_INIT(&ad->ad_deps);
899
900 if (ad->ad_parent != NULL) {
901
902 SIMPLEQ_INSERT_TAIL(&ad->ad_parent->ad_child_head,
903 ad, ad_child_list);
904 }
905
906 awc->aw_parent = ad;
907 break;
908
909 default:
910 ACPI_FREE(devinfo);
911 break;
912 }
913
914 return AE_OK;
915 }
916
917 static ACPI_STATUS
acpi_make_devnode_post(ACPI_HANDLE handle,uint32_t level,void * context,void ** status)918 acpi_make_devnode_post(ACPI_HANDLE handle, uint32_t level,
919 void *context, void **status)
920 {
921 struct acpi_walkcontext *awc = context;
922
923 KASSERT(awc != NULL);
924 KASSERT(awc->aw_parent != NULL);
925
926 if (handle == awc->aw_parent->ad_handle)
927 awc->aw_parent = awc->aw_parent->ad_parent;
928
929 return AE_OK;
930 }
931
932 static void
acpi_make_name(struct acpi_devnode * ad,uint32_t name)933 acpi_make_name(struct acpi_devnode *ad, uint32_t name)
934 {
935 ACPI_NAME_UNION *anu;
936 int clear, i;
937
938 anu = (ACPI_NAME_UNION *)&name;
939 ad->ad_name[4] = '\0';
940
941 for (i = 3, clear = 0; i >= 0; i--) {
942
943 if (clear == 0 && anu->Ascii[i] == '_')
944 ad->ad_name[i] = '\0';
945 else {
946 ad->ad_name[i] = anu->Ascii[i];
947 clear = 1;
948 }
949 }
950
951 if (ad->ad_name[0] == '\0')
952 ad->ad_name[0] = '_';
953 }
954
955 bus_dma_tag_t
acpi_default_dma_tag(struct acpi_softc * sc,struct acpi_devnode * ad)956 acpi_default_dma_tag(struct acpi_softc *sc, struct acpi_devnode *ad)
957 {
958 return sc->sc_dmat;
959 }
960 __weak_alias(acpi_get_dma_tag,acpi_default_dma_tag);
961
962 bus_dma_tag_t
acpi_default_dma64_tag(struct acpi_softc * sc,struct acpi_devnode * ad)963 acpi_default_dma64_tag(struct acpi_softc *sc, struct acpi_devnode *ad)
964 {
965 return sc->sc_dmat64;
966 }
967 __weak_alias(acpi_get_dma64_tag,acpi_default_dma64_tag);
968
969 pci_chipset_tag_t
acpi_default_pci_chipset_tag(struct acpi_softc * sc,int seg,int bbn)970 acpi_default_pci_chipset_tag(struct acpi_softc *sc, int seg, int bbn)
971 {
972 return NULL;
973 }
974 __weak_alias(acpi_get_pci_chipset_tag,acpi_default_pci_chipset_tag);
975
976 /*
977 * Device attachment.
978 */
979 static int
acpi_rescan(device_t self,const char * ifattr,const int * locators)980 acpi_rescan(device_t self, const char *ifattr, const int *locators)
981 {
982 struct acpi_softc *sc = device_private(self);
983 struct acpi_attach_args aa;
984
985 /*
986 * Try to attach hpet(4) first via a specific table.
987 */
988 aa.aa_memt = sc->sc_memt;
989
990 if (ifattr_match(ifattr, "acpihpetbus") && sc->sc_hpet == NULL) {
991 sc->sc_hpet = config_found(sc->sc_dev, &aa, NULL,
992 CFARGS(.iattr = "acpihpetbus"));
993 }
994
995 /*
996 * A two-pass scan for acpinodebus.
997 */
998 if (ifattr_match(ifattr, "acpinodebus")) {
999 acpi_rescan_early(sc);
1000 acpi_rescan_nodes(sc);
1001 }
1002
1003 /*
1004 * Attach APM emulation and acpiwdrt(4).
1005 */
1006 if (ifattr_match(ifattr, "acpiapmbus") && sc->sc_apmbus == NULL) {
1007 sc->sc_apmbus = config_found(sc->sc_dev, NULL, NULL,
1008 CFARGS(.iattr = "acpiapmbus"));
1009 }
1010
1011 if (ifattr_match(ifattr, "acpiwdrtbus") && sc->sc_wdrt == NULL) {
1012 sc->sc_wdrt = config_found(sc->sc_dev, NULL, NULL,
1013 CFARGS(.iattr = "acpiwdrtbus"));
1014 }
1015
1016 if (ifattr_match(ifattr, "apeibus") && sc->sc_apei == NULL) {
1017 sc->sc_apei = config_found(sc->sc_dev, NULL, NULL,
1018 CFARGS(.iattr = "apeibus"));
1019 }
1020
1021 return 0;
1022 }
1023
1024 static void
acpi_rescan_node(struct acpi_softc * sc,struct acpi_devnode * ad)1025 acpi_rescan_node(struct acpi_softc *sc, struct acpi_devnode *ad)
1026 {
1027 const char * const hpet_ids[] = { "PNP0103", NULL };
1028 struct acpi_attach_args aa;
1029 struct acpi_devnodedep *dd;
1030 ACPI_DEVICE_INFO *di = ad->ad_devinfo;
1031
1032 if (ad->ad_scanned || ad->ad_device != NULL) {
1033 return;
1034 }
1035
1036 /*
1037 * Mark as scanned before checking dependencies to
1038 * break out of dependency cycles.
1039 */
1040 ad->ad_scanned = true;
1041
1042 if (!acpi_device_present(ad->ad_handle)) {
1043 return;
1044 }
1045
1046 if (acpi_match_hid(di, acpi_ignored_ids) != 0) {
1047 return;
1048 }
1049
1050 if (acpi_match_hid(di, hpet_ids) != 0 && sc->sc_hpet != NULL) {
1051 return;
1052 }
1053
1054 /* Rescan dependencies first. */
1055 SIMPLEQ_FOREACH(dd, &ad->ad_deps, dd_list) {
1056 if (!dd->dd_node->ad_scanned) {
1057 acpi_rescan_node(sc, dd->dd_node);
1058 }
1059 }
1060
1061 /* Dependency scanning may have claimed this device. */
1062 if (ad->ad_device != NULL) {
1063 return;
1064 }
1065
1066 aa.aa_node = ad;
1067 aa.aa_iot = sc->sc_iot;
1068 aa.aa_memt = sc->sc_memt;
1069 if (ad->ad_pciinfo != NULL) {
1070 aa.aa_pc = ad->ad_pciinfo->ap_pc;
1071 aa.aa_pciflags = sc->sc_pciflags;
1072 }
1073 aa.aa_ic = sc->sc_ic;
1074 aa.aa_dmat = ad->ad_dmat;
1075 aa.aa_dmat64 = ad->ad_dmat64;
1076
1077 ad->ad_device = config_found(sc->sc_dev, &aa, acpi_print,
1078 CFARGS(.iattr = "acpinodebus",
1079 .devhandle = devhandle_from_acpi(devhandle_invalid(),
1080 ad->ad_handle)));
1081 }
1082
1083 static void
acpi_rescan_early(struct acpi_softc * sc)1084 acpi_rescan_early(struct acpi_softc *sc)
1085 {
1086 struct acpi_devnode *ad;
1087
1088 /*
1089 * First scan for devices such as acpiec(4) that
1090 * should be always attached before anything else.
1091 * We want these devices to attach regardless of
1092 * the device status and other restrictions.
1093 */
1094 SIMPLEQ_FOREACH(ad, &sc->sc_head, ad_list) {
1095
1096 if (ad->ad_device != NULL)
1097 continue;
1098
1099 if (ad->ad_devinfo->Type != ACPI_TYPE_DEVICE)
1100 continue;
1101
1102 if (acpi_match_hid(ad->ad_devinfo, acpi_early_ids) == 0)
1103 continue;
1104
1105 KASSERT(ad->ad_handle != NULL);
1106
1107 acpi_rescan_node(sc, ad);
1108 }
1109 }
1110
1111 static void
acpi_rescan_nodes(struct acpi_softc * sc)1112 acpi_rescan_nodes(struct acpi_softc *sc)
1113 {
1114 struct acpi_devnode *ad;
1115 ACPI_DEVICE_INFO *di;
1116
1117 /* Reset scan state. */
1118 SIMPLEQ_FOREACH(ad, &sc->sc_head, ad_list) {
1119 ad->ad_scanned = false;
1120 }
1121
1122 SIMPLEQ_FOREACH(ad, &sc->sc_head, ad_list) {
1123
1124 if (ad->ad_device != NULL)
1125 continue;
1126
1127 /*
1128 * There is a bug in ACPICA: it defines the type
1129 * of the scopes incorrectly for its own reasons.
1130 */
1131 if (acpi_is_scope(ad) != false)
1132 continue;
1133
1134 di = ad->ad_devinfo;
1135
1136 /*
1137 * We only attach devices which are present, enabled, and
1138 * functioning properly. However, if a device is enabled,
1139 * it is decoding resources and we should claim these,
1140 * if possible. This requires changes to bus_space(9).
1141 */
1142 if (di->Type == ACPI_TYPE_DEVICE &&
1143 !acpi_device_present(ad->ad_handle)) {
1144 continue;
1145 }
1146
1147 if (di->Type == ACPI_TYPE_POWER)
1148 continue;
1149
1150 if (di->Type == ACPI_TYPE_PROCESSOR)
1151 continue;
1152
1153 if (acpi_match_hid(di, acpi_early_ids) != 0)
1154 continue;
1155
1156 KASSERT(ad->ad_handle != NULL);
1157
1158 acpi_rescan_node(sc, ad);
1159 }
1160 }
1161
1162 static void
acpi_rescan_capabilities(device_t self)1163 acpi_rescan_capabilities(device_t self)
1164 {
1165 struct acpi_softc *sc = device_private(self);
1166 struct acpi_devnode *ad;
1167 ACPI_HANDLE tmp;
1168 ACPI_STATUS rv;
1169
1170 SIMPLEQ_FOREACH(ad, &sc->sc_head, ad_list) {
1171
1172 if (ad->ad_devinfo->Type != ACPI_TYPE_DEVICE)
1173 continue;
1174
1175 /*
1176 * Scan power resource capabilities.
1177 *
1178 * If any power states are supported,
1179 * at least _PR0 and _PR3 must be present.
1180 */
1181 rv = AcpiGetHandle(ad->ad_handle, "_PR0", &tmp);
1182
1183 if (ACPI_SUCCESS(rv)) {
1184 ad->ad_flags |= ACPI_DEVICE_POWER;
1185 acpi_power_add(ad);
1186 }
1187
1188 /*
1189 * Scan wake-up capabilities.
1190 */
1191 if (ad->ad_wakedev != NULL) {
1192 ad->ad_flags |= ACPI_DEVICE_WAKEUP;
1193 acpi_wakedev_add(ad);
1194 }
1195
1196 /*
1197 * Scan docking stations.
1198 */
1199 rv = AcpiGetHandle(ad->ad_handle, "_DCK", &tmp);
1200
1201 if (ACPI_SUCCESS(rv))
1202 ad->ad_flags |= ACPI_DEVICE_DOCK;
1203
1204 /*
1205 * Scan devices that are ejectable.
1206 */
1207 rv = AcpiGetHandle(ad->ad_handle, "_EJ0", &tmp);
1208
1209 if (ACPI_SUCCESS(rv))
1210 ad->ad_flags |= ACPI_DEVICE_EJECT;
1211 }
1212 }
1213
1214 static int
acpi_print(void * aux,const char * pnp)1215 acpi_print(void *aux, const char *pnp)
1216 {
1217 struct acpi_attach_args *aa = aux;
1218 struct acpi_devnode *ad;
1219 const char *hid, *uid;
1220 ACPI_DEVICE_INFO *di;
1221
1222 ad = aa->aa_node;
1223 di = ad->ad_devinfo;
1224
1225 hid = di->HardwareId.String;
1226 uid = di->UniqueId.String;
1227
1228 if (pnp != NULL) {
1229
1230 if (di->Type != ACPI_TYPE_DEVICE) {
1231
1232 aprint_normal("%s (ACPI Object Type '%s') at %s",
1233 ad->ad_name, AcpiUtGetTypeName(ad->ad_type), pnp);
1234
1235 return UNCONF;
1236 }
1237
1238 if ((di->Valid & ACPI_VALID_HID) == 0 || hid == NULL)
1239 return 0;
1240
1241 aprint_normal("%s (%s) ", ad->ad_name, hid);
1242 acpi_print_dev(hid);
1243 aprint_normal("at %s", pnp);
1244
1245 return UNCONF;
1246 }
1247
1248 aprint_normal(" (%s", ad->ad_name);
1249
1250 if ((di->Valid & ACPI_VALID_HID) != 0 && hid != NULL) {
1251
1252 aprint_normal(", %s", hid);
1253
1254 if ((di->Valid & ACPI_VALID_UID) != 0 && uid != NULL) {
1255
1256 if (uid[0] == '\0')
1257 uid = "<null>";
1258
1259 aprint_normal("-%s", uid);
1260 }
1261 }
1262
1263 aprint_normal(")");
1264
1265 return UNCONF;
1266 }
1267
1268 /*
1269 * Notify.
1270 */
1271 static void
acpi_notify_handler(ACPI_HANDLE handle,uint32_t event,void * aux)1272 acpi_notify_handler(ACPI_HANDLE handle, uint32_t event, void *aux)
1273 {
1274 struct acpi_softc *sc = acpi_softc;
1275 struct acpi_devnode *ad;
1276 ACPI_NOTIFY_HANDLER notify;
1277
1278 KASSERT(sc != NULL);
1279 KASSERT(aux == NULL);
1280 KASSERT(acpi_active != 0);
1281
1282 if (acpi_suspended != 0)
1283 return;
1284
1285 /*
1286 * System: 0x00 - 0x7F.
1287 * Device: 0x80 - 0xFF.
1288 */
1289 switch (event) {
1290
1291 case ACPI_NOTIFY_BUS_CHECK:
1292 case ACPI_NOTIFY_DEVICE_CHECK:
1293 case ACPI_NOTIFY_DEVICE_WAKE:
1294 case ACPI_NOTIFY_EJECT_REQUEST:
1295 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
1296 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
1297 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
1298 case ACPI_NOTIFY_POWER_FAULT:
1299 case ACPI_NOTIFY_CAPABILITIES_CHECK:
1300 case ACPI_NOTIFY_DEVICE_PLD_CHECK:
1301 case ACPI_NOTIFY_RESERVED:
1302 case ACPI_NOTIFY_LOCALITY_UPDATE:
1303 break;
1304 }
1305
1306 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "notification 0x%02X for "
1307 "%s (%p)\n", event, acpi_name(handle), handle));
1308
1309 /*
1310 * We deliver notifications only to drivers
1311 * that have been successfully attached and
1312 * that have registered a handler with us.
1313 * The opaque pointer is always the device_t.
1314 */
1315 SIMPLEQ_FOREACH(ad, &sc->sc_head, ad_list) {
1316
1317 if (ad->ad_device == NULL)
1318 continue;
1319
1320 if ((notify = atomic_load_acquire(&ad->ad_notify)) == NULL)
1321 continue;
1322
1323 if (ad->ad_handle != handle)
1324 continue;
1325
1326 (*notify)(ad->ad_handle, event, ad->ad_device);
1327
1328 return;
1329 }
1330
1331 aprint_debug_dev(sc->sc_dev, "unhandled notify 0x%02X "
1332 "for %s (%p)\n", event, acpi_name(handle), handle);
1333 }
1334
1335 bool
acpi_register_notify(struct acpi_devnode * ad,ACPI_NOTIFY_HANDLER notify)1336 acpi_register_notify(struct acpi_devnode *ad, ACPI_NOTIFY_HANDLER notify)
1337 {
1338 struct acpi_softc *sc = acpi_softc;
1339
1340 KASSERT(sc != NULL);
1341 KASSERT(acpi_active != 0);
1342
1343 if (acpi_suspended != 0)
1344 goto fail;
1345
1346 if (ad == NULL || notify == NULL)
1347 goto fail;
1348
1349 KASSERTMSG(ad->ad_notify == NULL,
1350 "%s: ACPI node %s already has notify handler: %p",
1351 ad->ad_device ? device_xname(ad->ad_device) : "(unknown)",
1352 ad->ad_name,
1353 ad->ad_notify);
1354 atomic_store_release(&ad->ad_notify, notify);
1355
1356 return true;
1357
1358 fail:
1359 aprint_error_dev(sc->sc_dev, "failed to register notify "
1360 "handler for %s (%p)\n", ad->ad_name, ad->ad_handle);
1361
1362 return false;
1363 }
1364
1365 void
acpi_deregister_notify(struct acpi_devnode * ad)1366 acpi_deregister_notify(struct acpi_devnode *ad)
1367 {
1368
1369 atomic_store_relaxed(&ad->ad_notify, NULL);
1370
1371 /* Wait for any in-flight calls to the notifier to complete. */
1372 AcpiOsWaitEventsComplete();
1373 }
1374
1375 /*
1376 * Fixed buttons.
1377 */
1378 static void
acpi_register_fixed_button(struct acpi_softc * sc,int event)1379 acpi_register_fixed_button(struct acpi_softc *sc, int event)
1380 {
1381 struct sysmon_pswitch *smpsw;
1382 ACPI_STATUS rv;
1383 int type;
1384
1385 switch (event) {
1386
1387 case ACPI_EVENT_POWER_BUTTON:
1388
1389 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) != 0)
1390 return;
1391
1392 type = PSWITCH_TYPE_POWER;
1393 smpsw = &sc->sc_smpsw_power;
1394 break;
1395
1396 case ACPI_EVENT_SLEEP_BUTTON:
1397
1398 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) != 0)
1399 return;
1400
1401 type = PSWITCH_TYPE_SLEEP;
1402 smpsw = &sc->sc_smpsw_sleep;
1403 break;
1404
1405 default:
1406 rv = AE_TYPE;
1407 goto fail;
1408 }
1409
1410 smpsw->smpsw_type = type;
1411 smpsw->smpsw_name = device_xname(sc->sc_dev);
1412
1413 if (sysmon_pswitch_register(smpsw) != 0) {
1414 rv = AE_ERROR;
1415 goto fail;
1416 }
1417
1418 AcpiClearEvent(event);
1419
1420 rv = AcpiInstallFixedEventHandler(event,
1421 acpi_fixed_button_handler, smpsw);
1422
1423 if (ACPI_FAILURE(rv)) {
1424 sysmon_pswitch_unregister(smpsw);
1425 goto fail;
1426 }
1427
1428 aprint_normal_dev(sc->sc_dev, "fixed %s button present\n",
1429 (type != PSWITCH_TYPE_SLEEP) ? "power" : "sleep");
1430
1431 return;
1432
1433 fail:
1434 aprint_error_dev(sc->sc_dev, "failed to register "
1435 "fixed event %d: %s\n", event, AcpiFormatException(rv));
1436 }
1437
1438 static void
acpi_deregister_fixed_button(struct acpi_softc * sc,int event)1439 acpi_deregister_fixed_button(struct acpi_softc *sc, int event)
1440 {
1441 struct sysmon_pswitch *smpsw;
1442 ACPI_STATUS rv;
1443
1444 switch (event) {
1445
1446 case ACPI_EVENT_POWER_BUTTON:
1447 smpsw = &sc->sc_smpsw_power;
1448
1449 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) != 0) {
1450 KASSERT(smpsw->smpsw_type != PSWITCH_TYPE_POWER);
1451 return;
1452 }
1453
1454 break;
1455
1456 case ACPI_EVENT_SLEEP_BUTTON:
1457 smpsw = &sc->sc_smpsw_sleep;
1458
1459 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) != 0) {
1460 KASSERT(smpsw->smpsw_type != PSWITCH_TYPE_SLEEP);
1461 return;
1462 }
1463
1464 break;
1465
1466 default:
1467 rv = AE_TYPE;
1468 goto fail;
1469 }
1470
1471 rv = AcpiRemoveFixedEventHandler(event, acpi_fixed_button_handler);
1472
1473 if (ACPI_SUCCESS(rv)) {
1474 sysmon_pswitch_unregister(smpsw);
1475 return;
1476 }
1477
1478 fail:
1479 aprint_error_dev(sc->sc_dev, "failed to deregister "
1480 "fixed event: %s\n", AcpiFormatException(rv));
1481 }
1482
1483 static uint32_t
acpi_fixed_button_handler(void * context)1484 acpi_fixed_button_handler(void *context)
1485 {
1486 static const int handler = OSL_NOTIFY_HANDLER;
1487 struct sysmon_pswitch *smpsw = context;
1488
1489 (void)AcpiOsExecute(handler, acpi_fixed_button_pressed, smpsw);
1490
1491 return ACPI_INTERRUPT_HANDLED;
1492 }
1493
1494 static void
acpi_fixed_button_pressed(void * context)1495 acpi_fixed_button_pressed(void *context)
1496 {
1497 struct sysmon_pswitch *smpsw = context;
1498
1499 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s fixed button pressed\n",
1500 (smpsw->smpsw_type != ACPI_EVENT_SLEEP_BUTTON) ?
1501 "power" : "sleep"));
1502
1503 sysmon_pswitch_event(smpsw, PSWITCH_EVENT_PRESSED);
1504 }
1505
1506 /*
1507 * Sleep.
1508 */
1509 static void
acpi_sleep_init(struct acpi_softc * sc)1510 acpi_sleep_init(struct acpi_softc *sc)
1511 {
1512 uint8_t a, b, i;
1513 ACPI_STATUS rv;
1514
1515 CTASSERT(ACPI_STATE_S0 == 0 && ACPI_STATE_S1 == 1);
1516 CTASSERT(ACPI_STATE_S2 == 2 && ACPI_STATE_S3 == 3);
1517 CTASSERT(ACPI_STATE_S4 == 4 && ACPI_STATE_S5 == 5);
1518
1519 /*
1520 * Evaluate supported sleep states.
1521 */
1522 for (i = ACPI_STATE_S0; i <= ACPI_STATE_S5; i++) {
1523
1524 rv = AcpiGetSleepTypeData(i, &a, &b);
1525
1526 if (ACPI_SUCCESS(rv))
1527 sc->sc_sleepstates |= __BIT(i);
1528 }
1529 }
1530
1531 /*
1532 * Must be called with interrupts enabled.
1533 */
1534 void
acpi_enter_sleep_state(int state)1535 acpi_enter_sleep_state(int state)
1536 {
1537 struct acpi_softc *sc = acpi_softc;
1538 ACPI_STATUS rv;
1539
1540 if (acpi_softc == NULL)
1541 return;
1542
1543 if (state == sc->sc_sleepstate)
1544 return;
1545
1546 if (state < ACPI_STATE_S0 || state > ACPI_STATE_S5)
1547 return;
1548
1549 aprint_normal_dev(sc->sc_dev, "entering state S%d\n", state);
1550
1551 switch (state) {
1552
1553 case ACPI_STATE_S0:
1554 sc->sc_sleepstate = ACPI_STATE_S0;
1555 return;
1556
1557 case ACPI_STATE_S1:
1558 case ACPI_STATE_S2:
1559 case ACPI_STATE_S3:
1560 case ACPI_STATE_S4:
1561
1562 if ((sc->sc_sleepstates & __BIT(state)) == 0) {
1563 aprint_error_dev(sc->sc_dev, "sleep state "
1564 "S%d is not available\n", state);
1565 return;
1566 }
1567
1568 /*
1569 * Evaluate the _TTS method. This should be done before
1570 * pmf_system_suspend(9) and the evaluation of _PTS.
1571 * We should also re-evaluate this once we return to
1572 * S0 or if we abort the sleep state transition in the
1573 * middle (see ACPI 3.0, section 7.3.6). In reality,
1574 * however, the _TTS method is seldom seen in the field.
1575 */
1576 rv = acpi_eval_set_integer(NULL, "\\_TTS", state);
1577
1578 if (ACPI_SUCCESS(rv))
1579 aprint_debug_dev(sc->sc_dev, "evaluated _TTS\n");
1580
1581 if (state != ACPI_STATE_S1 &&
1582 pmf_system_suspend(PMF_Q_NONE) != true) {
1583 aprint_error_dev(sc->sc_dev, "aborting suspend\n");
1584 break;
1585 }
1586
1587 /*
1588 * This will evaluate the _PTS and _SST methods,
1589 * but unlike the documentation claims, not _GTS,
1590 * which is evaluated in AcpiEnterSleepState().
1591 * This must be called with interrupts enabled.
1592 */
1593 rv = AcpiEnterSleepStatePrep(state);
1594
1595 if (ACPI_FAILURE(rv)) {
1596 aprint_error_dev(sc->sc_dev, "failed to prepare "
1597 "S%d: %s\n", state, AcpiFormatException(rv));
1598 break;
1599 }
1600
1601 /*
1602 * After the _PTS method has been evaluated, we can
1603 * enable wake and evaluate _PSW (ACPI 4.0, p. 284).
1604 */
1605 acpi_wakedev_commit(sc, state);
1606
1607 sc->sc_sleepstate = state;
1608
1609 if (state == ACPI_STATE_S1) {
1610
1611 /*
1612 * Before the transition to S1, CPU caches
1613 * must be flushed (see ACPI 4.0, 7.3.4.2).
1614 *
1615 * Note that interrupts must be off before
1616 * calling AcpiEnterSleepState(). Conversely,
1617 * AcpiLeaveSleepState() should always be
1618 * called with interrupts enabled.
1619 */
1620 acpi_md_OsDisableInterrupt();
1621
1622 ACPI_FLUSH_CPU_CACHE();
1623 rv = AcpiEnterSleepState(state);
1624
1625 if (ACPI_FAILURE(rv))
1626 aprint_error_dev(sc->sc_dev, "failed to "
1627 "enter S1: %s\n", AcpiFormatException(rv));
1628
1629 /*
1630 * Clear fixed events and disable all GPEs before
1631 * interrupts are enabled.
1632 */
1633 AcpiClearEvent(ACPI_EVENT_PMTIMER);
1634 AcpiClearEvent(ACPI_EVENT_GLOBAL);
1635 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
1636 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
1637 AcpiClearEvent(ACPI_EVENT_RTC);
1638 #if (!ACPI_REDUCED_HARDWARE)
1639 AcpiHwDisableAllGpes();
1640 #endif
1641
1642 acpi_md_OsEnableInterrupt();
1643 rv = AcpiLeaveSleepState(state);
1644
1645 } else {
1646
1647 (void)acpi_md_sleep(state);
1648
1649 if (state == ACPI_STATE_S4)
1650 AcpiEnable();
1651
1652 (void)pmf_system_bus_resume(PMF_Q_NONE);
1653 (void)AcpiLeaveSleepState(state);
1654 #if (!ACPI_REDUCED_HARDWARE)
1655 (void)AcpiSetFirmwareWakingVector(0, 0);
1656 #endif
1657 (void)pmf_system_resume(PMF_Q_NONE);
1658 }
1659
1660 /*
1661 * No wake GPEs should be enabled at runtime.
1662 */
1663 acpi_wakedev_commit(sc, ACPI_STATE_S0);
1664 break;
1665
1666 case ACPI_STATE_S5:
1667
1668 (void)acpi_eval_set_integer(NULL, "\\_TTS", ACPI_STATE_S5);
1669
1670 rv = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
1671
1672 if (ACPI_FAILURE(rv)) {
1673 aprint_error_dev(sc->sc_dev, "failed to prepare "
1674 "S%d: %s\n", state, AcpiFormatException(rv));
1675 break;
1676 }
1677
1678 (void)AcpiDisableAllGpes();
1679
1680 DELAY(1000000);
1681
1682 sc->sc_sleepstate = state;
1683 acpi_md_OsDisableInterrupt();
1684
1685 (void)AcpiEnterSleepState(ACPI_STATE_S5);
1686
1687 aprint_error_dev(sc->sc_dev, "WARNING: powerdown failed!\n");
1688
1689 break;
1690 }
1691
1692 sc->sc_sleepstate = ACPI_STATE_S0;
1693
1694 (void)acpi_eval_set_integer(NULL, "\\_TTS", ACPI_STATE_S0);
1695 }
1696
1697 /*
1698 * Sysctl.
1699 */
1700 SYSCTL_SETUP(sysctl_acpi_setup, "sysctl hw.acpi subtree setup")
1701 {
1702 const struct sysctlnode *rnode, *snode;
1703 int err;
1704
1705 err = sysctl_createv(clog, 0, NULL, &rnode,
1706 CTLFLAG_PERMANENT, CTLTYPE_NODE,
1707 "acpi", SYSCTL_DESCR("ACPI subsystem parameters"),
1708 NULL, 0, NULL, 0,
1709 CTL_HW, CTL_CREATE, CTL_EOL);
1710
1711 if (err != 0)
1712 return;
1713
1714 (void)sysctl_createv(NULL, 0, &rnode, NULL,
1715 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD,
1716 "root", SYSCTL_DESCR("ACPI root pointer"),
1717 NULL, 0, &acpi_root_pointer, sizeof(acpi_root_pointer),
1718 CTL_CREATE, CTL_EOL);
1719
1720 err = sysctl_createv(clog, 0, &rnode, &snode,
1721 CTLFLAG_PERMANENT, CTLTYPE_NODE,
1722 "sleep", SYSCTL_DESCR("ACPI sleep"),
1723 NULL, 0, NULL, 0,
1724 CTL_CREATE, CTL_EOL);
1725
1726 if (err != 0)
1727 return;
1728
1729 (void)sysctl_createv(NULL, 0, &snode, NULL,
1730 CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT,
1731 "state", SYSCTL_DESCR("System sleep state"),
1732 sysctl_hw_acpi_sleepstate, 0, NULL, 0,
1733 CTL_CREATE, CTL_EOL);
1734
1735 (void)sysctl_createv(NULL, 0, &snode, NULL,
1736 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_STRING,
1737 "states", SYSCTL_DESCR("Supported sleep states"),
1738 sysctl_hw_acpi_sleepstates, 0, NULL, 0,
1739 CTL_CREATE, CTL_EOL);
1740
1741 err = sysctl_createv(clog, 0, &rnode, &rnode,
1742 CTLFLAG_PERMANENT, CTLTYPE_NODE,
1743 "stat", SYSCTL_DESCR("ACPI statistics"),
1744 NULL, 0, NULL, 0,
1745 CTL_CREATE, CTL_EOL);
1746
1747 if (err != 0)
1748 return;
1749
1750 (void)sysctl_createv(clog, 0, &rnode, NULL,
1751 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD,
1752 "gpe", SYSCTL_DESCR("Number of dispatched GPEs"),
1753 NULL, 0, &AcpiGpeCount, sizeof(AcpiGpeCount),
1754 CTL_CREATE, CTL_EOL);
1755
1756 (void)sysctl_createv(clog, 0, &rnode, NULL,
1757 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD,
1758 "sci", SYSCTL_DESCR("Number of SCI interrupts"),
1759 NULL, 0, &AcpiSciCount, sizeof(AcpiSciCount),
1760 CTL_CREATE, CTL_EOL);
1761
1762 (void)sysctl_createv(clog, 0, &rnode, NULL,
1763 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD,
1764 "fixed", SYSCTL_DESCR("Number of fixed events"),
1765 sysctl_hw_acpi_fixedstats, 0, NULL, 0,
1766 CTL_CREATE, CTL_EOL);
1767
1768 (void)sysctl_createv(clog, 0, &rnode, NULL,
1769 CTLFLAG_PERMANENT | CTLFLAG_READONLY, CTLTYPE_QUAD,
1770 "method", SYSCTL_DESCR("Number of methods executed"),
1771 NULL, 0, &AcpiMethodCount, sizeof(AcpiMethodCount),
1772 CTL_CREATE, CTL_EOL);
1773
1774 CTASSERT(sizeof(AcpiGpeCount) == sizeof(uint64_t));
1775 CTASSERT(sizeof(AcpiSciCount) == sizeof(uint64_t));
1776 }
1777
1778 static int
sysctl_hw_acpi_fixedstats(SYSCTLFN_ARGS)1779 sysctl_hw_acpi_fixedstats(SYSCTLFN_ARGS)
1780 {
1781 struct sysctlnode node;
1782 uint64_t t;
1783 int err, i;
1784
1785 for (i = t = 0; i < __arraycount(AcpiFixedEventCount); i++)
1786 t += AcpiFixedEventCount[i];
1787
1788 node = *rnode;
1789 node.sysctl_data = &t;
1790
1791 err = sysctl_lookup(SYSCTLFN_CALL(&node));
1792
1793 if (err || newp == NULL)
1794 return err;
1795
1796 return 0;
1797 }
1798
1799 static int
sysctl_hw_acpi_sleepstate(SYSCTLFN_ARGS)1800 sysctl_hw_acpi_sleepstate(SYSCTLFN_ARGS)
1801 {
1802 struct acpi_softc *sc = acpi_softc;
1803 struct sysctlnode node;
1804 int err, t;
1805
1806 if (acpi_softc == NULL)
1807 return ENOSYS;
1808
1809 node = *rnode;
1810 t = sc->sc_sleepstate;
1811 node.sysctl_data = &t;
1812
1813 err = sysctl_lookup(SYSCTLFN_CALL(&node));
1814
1815 if (err || newp == NULL)
1816 return err;
1817
1818 if (t < ACPI_STATE_S0 || t > ACPI_STATE_S5)
1819 return EINVAL;
1820
1821 acpi_enter_sleep_state(t);
1822
1823 return 0;
1824 }
1825
1826 static int
sysctl_hw_acpi_sleepstates(SYSCTLFN_ARGS)1827 sysctl_hw_acpi_sleepstates(SYSCTLFN_ARGS)
1828 {
1829 struct acpi_softc *sc = acpi_softc;
1830 struct sysctlnode node;
1831 char t[3 * 6 + 1];
1832 int err;
1833
1834 if (acpi_softc == NULL)
1835 return ENOSYS;
1836
1837 (void)memset(t, '\0', sizeof(t));
1838
1839 (void)snprintf(t, sizeof(t), "%s%s%s%s%s%s",
1840 ((sc->sc_sleepstates & __BIT(0)) != 0) ? "S0 " : "",
1841 ((sc->sc_sleepstates & __BIT(1)) != 0) ? "S1 " : "",
1842 ((sc->sc_sleepstates & __BIT(2)) != 0) ? "S2 " : "",
1843 ((sc->sc_sleepstates & __BIT(3)) != 0) ? "S3 " : "",
1844 ((sc->sc_sleepstates & __BIT(4)) != 0) ? "S4 " : "",
1845 ((sc->sc_sleepstates & __BIT(5)) != 0) ? "S5 " : "");
1846
1847 node = *rnode;
1848 node.sysctl_data = &t;
1849
1850 err = sysctl_lookup(SYSCTLFN_CALL(&node));
1851
1852 if (err || newp == NULL)
1853 return err;
1854
1855 return 0;
1856 }
1857
1858 /*
1859 * Tables.
1860 */
1861 ACPI_PHYSICAL_ADDRESS
acpi_OsGetRootPointer(void)1862 acpi_OsGetRootPointer(void)
1863 {
1864 ACPI_PHYSICAL_ADDRESS PhysicalAddress;
1865
1866 /*
1867 * We let MD code handle this since there are multiple ways to do it:
1868 *
1869 * IA-32: Use AcpiFindRootPointer() to locate the RSDP.
1870 *
1871 * IA-64: Use the EFI.
1872 */
1873 PhysicalAddress = acpi_md_OsGetRootPointer();
1874
1875 if (acpi_root_pointer == 0)
1876 acpi_root_pointer = PhysicalAddress;
1877
1878 return PhysicalAddress;
1879 }
1880
1881 static ACPI_TABLE_HEADER *
acpi_map_rsdt(void)1882 acpi_map_rsdt(void)
1883 {
1884 ACPI_PHYSICAL_ADDRESS paddr;
1885 ACPI_TABLE_RSDP *rsdp;
1886
1887 paddr = AcpiOsGetRootPointer();
1888
1889 if (paddr == 0)
1890 return NULL;
1891
1892 rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP));
1893
1894 if (rsdp == NULL)
1895 return NULL;
1896
1897 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress)
1898 paddr = rsdp->XsdtPhysicalAddress;
1899 else
1900 paddr = rsdp->RsdtPhysicalAddress;
1901
1902 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP));
1903
1904 return AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER));
1905 }
1906
1907 /*
1908 * XXX: Refactor to be a generic function that unmaps tables.
1909 */
1910 static void
acpi_unmap_rsdt(ACPI_TABLE_HEADER * rsdt)1911 acpi_unmap_rsdt(ACPI_TABLE_HEADER *rsdt)
1912 {
1913
1914 if (rsdt == NULL)
1915 return;
1916
1917 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER));
1918 }
1919
1920 /*
1921 * XXX: Refactor to be a generic function that maps tables.
1922 */
1923 ACPI_STATUS
acpi_madt_map(void)1924 acpi_madt_map(void)
1925 {
1926 ACPI_STATUS rv;
1927
1928 if (madt_header != NULL)
1929 return AE_ALREADY_EXISTS;
1930
1931 rv = AcpiGetTable(ACPI_SIG_MADT, 1, &madt_header);
1932
1933 if (ACPI_FAILURE(rv))
1934 return rv;
1935
1936 return AE_OK;
1937 }
1938
1939 void
acpi_madt_unmap(void)1940 acpi_madt_unmap(void)
1941 {
1942 madt_header = NULL;
1943 }
1944
1945 ACPI_STATUS
acpi_gtdt_map(void)1946 acpi_gtdt_map(void)
1947 {
1948 ACPI_STATUS rv;
1949
1950 if (gtdt_header != NULL)
1951 return AE_ALREADY_EXISTS;
1952
1953 rv = AcpiGetTable(ACPI_SIG_GTDT, 1, >dt_header);
1954
1955 if (ACPI_FAILURE(rv))
1956 return rv;
1957
1958 return AE_OK;
1959 }
1960
1961 void
acpi_gtdt_unmap(void)1962 acpi_gtdt_unmap(void)
1963 {
1964 gtdt_header = NULL;
1965 }
1966
1967 /*
1968 * XXX: Refactor to be a generic function that walks tables.
1969 */
1970 void
acpi_madt_walk(ACPI_STATUS (* func)(ACPI_SUBTABLE_HEADER *,void *),void * aux)1971 acpi_madt_walk(ACPI_STATUS (*func)(ACPI_SUBTABLE_HEADER *, void *), void *aux)
1972 {
1973 ACPI_SUBTABLE_HEADER *hdrp;
1974 char *madtend, *where;
1975
1976 madtend = (char *)madt_header + madt_header->Length;
1977 where = (char *)madt_header + sizeof (ACPI_TABLE_MADT);
1978
1979 while (where < madtend) {
1980
1981 hdrp = (ACPI_SUBTABLE_HEADER *)where;
1982
1983 if (hdrp->Length == 0 || ACPI_FAILURE(func(hdrp, aux)))
1984 break;
1985
1986 where += hdrp->Length;
1987 }
1988 }
1989
1990 void
acpi_gtdt_walk(ACPI_STATUS (* func)(ACPI_GTDT_HEADER *,void *),void * aux)1991 acpi_gtdt_walk(ACPI_STATUS (*func)(ACPI_GTDT_HEADER *, void *), void *aux)
1992 {
1993 ACPI_GTDT_HEADER *hdrp;
1994 char *gtdtend, *where;
1995
1996 gtdtend = (char *)gtdt_header + gtdt_header->Length;
1997 where = (char *)gtdt_header + sizeof (ACPI_TABLE_GTDT);
1998
1999 while (where < gtdtend) {
2000
2001 hdrp = (ACPI_GTDT_HEADER *)where;
2002
2003 if (hdrp->Length == 0 || ACPI_FAILURE(func(hdrp, aux)))
2004 break;
2005
2006 where += hdrp->Length;
2007 }
2008 }
2009
2010 /*
2011 * Miscellaneous.
2012 */
2013 static bool
acpi_is_scope(struct acpi_devnode * ad)2014 acpi_is_scope(struct acpi_devnode *ad)
2015 {
2016 int i;
2017
2018 /*
2019 * Return true if the node is a root scope.
2020 */
2021 if (ad->ad_parent == NULL)
2022 return false;
2023
2024 if (ad->ad_parent->ad_handle != ACPI_ROOT_OBJECT)
2025 return false;
2026
2027 for (i = 0; i < __arraycount(acpi_scopes); i++) {
2028
2029 if (acpi_scopes[i] == NULL)
2030 continue;
2031
2032 if (ad->ad_handle == acpi_scopes[i])
2033 return true;
2034 }
2035
2036 return false;
2037 }
2038
2039 bool
acpi_device_present(ACPI_HANDLE handle)2040 acpi_device_present(ACPI_HANDLE handle)
2041 {
2042 ACPI_STATUS rv;
2043 ACPI_INTEGER sta;
2044
2045 rv = acpi_eval_integer(handle, "_STA", &sta);
2046
2047 if (ACPI_FAILURE(rv)) {
2048 /* No _STA method -> must be there */
2049 return rv == AE_NOT_FOUND;
2050 }
2051
2052 return (sta & ACPI_STA_OK) == ACPI_STA_OK;
2053 }
2054
2055 /*
2056 * ACPIVERBOSE.
2057 */
2058 void
acpi_load_verbose(void)2059 acpi_load_verbose(void)
2060 {
2061
2062 if (acpi_verbose_loaded == 0)
2063 module_autoload("acpiverbose", MODULE_CLASS_MISC);
2064 }
2065
2066 void
acpi_print_verbose_stub(struct acpi_softc * sc)2067 acpi_print_verbose_stub(struct acpi_softc *sc)
2068 {
2069
2070 acpi_load_verbose();
2071
2072 if (acpi_verbose_loaded != 0)
2073 acpi_print_verbose(sc);
2074 }
2075
2076 void
acpi_print_dev_stub(const char * pnpstr)2077 acpi_print_dev_stub(const char *pnpstr)
2078 {
2079
2080 acpi_load_verbose();
2081
2082 if (acpi_verbose_loaded != 0)
2083 acpi_print_dev(pnpstr);
2084 }
2085
2086 MALLOC_DECLARE(M_ACPI); /* XXX: ACPI_ACTIVATE_DEV should use kmem(9). */
2087
2088 /*
2089 * ACPI_ACTIVATE_DEV.
2090 */
2091 static void
acpi_activate_device(ACPI_HANDLE handle,ACPI_DEVICE_INFO ** di)2092 acpi_activate_device(ACPI_HANDLE handle, ACPI_DEVICE_INFO **di)
2093 {
2094
2095 #ifndef ACPI_ACTIVATE_DEV
2096 return;
2097 }
2098 #else
2099 static const int valid = ACPI_VALID_HID;
2100 ACPI_DEVICE_INFO *newdi;
2101 ACPI_STATUS rv;
2102
2103
2104 /*
2105 * If the device is valid and present,
2106 * but not enabled, try to activate it.
2107 */
2108 if (((*di)->Valid & valid) != valid)
2109 return;
2110
2111 if (!acpi_device_present(handle))
2112 return;
2113
2114 rv = acpi_allocate_resources(handle);
2115
2116 if (ACPI_FAILURE(rv))
2117 goto fail;
2118
2119 rv = AcpiGetObjectInfo(handle, &newdi);
2120
2121 if (ACPI_FAILURE(rv))
2122 goto fail;
2123
2124 ACPI_FREE(*di);
2125 *di = newdi;
2126
2127 aprint_verbose_dev(acpi_softc->sc_dev,
2128 "%s activated\n", (*di)->HardwareId.String);
2129
2130 return;
2131
2132 fail:
2133 aprint_error_dev(acpi_softc->sc_dev, "failed to "
2134 "activate %s\n", (*di)->HardwareId.String);
2135 }
2136
2137 /*
2138 * XXX: This very incomplete.
2139 */
2140 ACPI_STATUS
2141 acpi_allocate_resources(ACPI_HANDLE handle)
2142 {
2143 ACPI_BUFFER bufp, bufc, bufn;
2144 ACPI_RESOURCE *resp, *resc, *resn;
2145 ACPI_RESOURCE_IRQ *irq;
2146 #if 0
2147 ACPI_RESOURCE_EXTENDED_IRQ *xirq;
2148 #endif
2149 ACPI_STATUS rv;
2150 uint delta;
2151
2152 rv = acpi_get(handle, &bufp, AcpiGetPossibleResources);
2153 if (ACPI_FAILURE(rv))
2154 goto out;
2155 rv = acpi_get(handle, &bufc, AcpiGetCurrentResources);
2156 if (ACPI_FAILURE(rv)) {
2157 goto out1;
2158 }
2159
2160 bufn.Length = 1000;
2161 bufn.Pointer = resn = malloc(bufn.Length, M_ACPI, M_WAITOK);
2162 resp = bufp.Pointer;
2163 resc = bufc.Pointer;
2164 while (resc->Type != ACPI_RESOURCE_TYPE_END_TAG &&
2165 resp->Type != ACPI_RESOURCE_TYPE_END_TAG) {
2166 while (resc->Type != resp->Type && resp->Type != ACPI_RESOURCE_TYPE_END_TAG)
2167 resp = ACPI_NEXT_RESOURCE(resp);
2168 if (resp->Type == ACPI_RESOURCE_TYPE_END_TAG)
2169 break;
2170 /* Found identical Id */
2171 resn->Type = resc->Type;
2172 switch (resc->Type) {
2173 case ACPI_RESOURCE_TYPE_IRQ:
2174 memcpy(&resn->Data, &resp->Data,
2175 sizeof(ACPI_RESOURCE_IRQ));
2176 irq = (ACPI_RESOURCE_IRQ *)&resn->Data;
2177 irq->Interrupts[0] =
2178 ((ACPI_RESOURCE_IRQ *)&resp->Data)->
2179 Interrupts[irq->InterruptCount-1];
2180 irq->InterruptCount = 1;
2181 resn->Length = ACPI_RS_SIZE(ACPI_RESOURCE_IRQ);
2182 break;
2183 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
2184 memcpy(&resn->Data, &resp->Data,
2185 sizeof(ACPI_RESOURCE_EXTENDED_IRQ));
2186 #if 0
2187 xirq = (ACPI_RESOURCE_EXTENDED_IRQ *)&resn->Data;
2188 /*
2189 * XXX: Not duplicating the interrupt logic above
2190 * because its not clear what it accomplishes.
2191 */
2192 xirq->Interrupts[0] =
2193 ((ACPI_RESOURCE_EXT_IRQ *)&resp->Data)->
2194 Interrupts[irq->NumberOfInterrupts-1];
2195 xirq->NumberOfInterrupts = 1;
2196 #endif
2197 resn->Length = ACPI_RS_SIZE(ACPI_RESOURCE_EXTENDED_IRQ);
2198 break;
2199 case ACPI_RESOURCE_TYPE_IO:
2200 memcpy(&resn->Data, &resp->Data,
2201 sizeof(ACPI_RESOURCE_IO));
2202 resn->Length = resp->Length;
2203 break;
2204 default:
2205 aprint_error_dev(acpi_softc->sc_dev,
2206 "%s: invalid type %u\n", __func__, resc->Type);
2207 rv = AE_BAD_DATA;
2208 goto out2;
2209 }
2210 resc = ACPI_NEXT_RESOURCE(resc);
2211 resn = ACPI_NEXT_RESOURCE(resn);
2212 resp = ACPI_NEXT_RESOURCE(resp);
2213 delta = (uint8_t *)resn - (uint8_t *)bufn.Pointer;
2214 if (delta >=
2215 bufn.Length-ACPI_RS_SIZE(ACPI_RESOURCE_DATA)) {
2216 bufn.Length *= 2;
2217 bufn.Pointer = realloc(bufn.Pointer, bufn.Length,
2218 M_ACPI, M_WAITOK);
2219 resn = (ACPI_RESOURCE *)((uint8_t *)bufn.Pointer +
2220 delta);
2221 }
2222 }
2223
2224 if (resc->Type != ACPI_RESOURCE_TYPE_END_TAG) {
2225 aprint_error_dev(acpi_softc->sc_dev,
2226 "%s: resc not exhausted\n", __func__);
2227 rv = AE_BAD_DATA;
2228 goto out3;
2229 }
2230
2231 resn->Type = ACPI_RESOURCE_TYPE_END_TAG;
2232 rv = AcpiSetCurrentResources(handle, &bufn);
2233
2234 if (ACPI_FAILURE(rv))
2235 aprint_error_dev(acpi_softc->sc_dev, "%s: failed to set "
2236 "resources: %s\n", __func__, AcpiFormatException(rv));
2237
2238 out3:
2239 free(bufn.Pointer, M_ACPI);
2240 out2:
2241 ACPI_FREE(bufc.Pointer);
2242 out1:
2243 ACPI_FREE(bufp.Pointer);
2244 out:
2245 return rv;
2246 }
2247
2248 #endif /* ACPI_ACTIVATE_DEV */
2249