xref: /freebsd/sys/dev/acpica/acpivar.h (revision f552d7ad)
1 /*-
2  * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
3  * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
4  * Copyright (c) 2000 BSDi
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #ifndef _ACPIVAR_H_
30 #define _ACPIVAR_H_
31 
32 #ifdef _KERNEL
33 
34 #include "acpi_if.h"
35 #include "bus_if.h"
36 #include <sys/_eventhandler.h>
37 #ifdef INTRNG
38 #include <sys/intr.h>
39 #endif
40 #include <sys/ktr.h>
41 #include <sys/lock.h>
42 #include <sys/mutex.h>
43 #include <sys/selinfo.h>
44 #include <sys/sx.h>
45 #include <sys/sysctl.h>
46 
47 #include <machine/bus.h>
48 #include <machine/resource.h>
49 
50 struct apm_clone_data;
51 struct acpi_softc {
52     device_t		acpi_dev;
53     struct cdev		*acpi_dev_t;
54 
55     int			acpi_enabled;
56     int			acpi_sstate;
57     int			acpi_sleep_disabled;
58 
59     struct sysctl_ctx_list acpi_sysctl_ctx;
60     struct sysctl_oid	*acpi_sysctl_tree;
61     int			acpi_power_button_sx;
62     int			acpi_sleep_button_sx;
63     int			acpi_lid_switch_sx;
64 
65     int			acpi_standby_sx;
66     int			acpi_suspend_sx;
67 
68     int			acpi_sleep_delay;
69     int			acpi_s4bios;
70     int			acpi_do_disable;
71     int			acpi_verbose;
72     int			acpi_handle_reboot;
73 
74     vm_offset_t		acpi_wakeaddr;
75     vm_paddr_t		acpi_wakephys;
76 
77     int			acpi_next_sstate;	/* Next suspend Sx state. */
78     struct apm_clone_data *acpi_clone;		/* Pseudo-dev for devd(8). */
79     STAILQ_HEAD(,apm_clone_data) apm_cdevs;	/* All apm/apmctl/acpi cdevs. */
80     struct callout	susp_force_to;		/* Force suspend if no acks. */
81 };
82 
83 struct acpi_device {
84     /* ACPI ivars */
85     ACPI_HANDLE			ad_handle;
86     void			*ad_private;
87     int				ad_flags;
88     int				ad_cls_class;
89 
90     ACPI_BUFFER			dsd;	/* Device Specific Data */
91     const ACPI_OBJECT	*dsd_pkg;
92 
93     /* Resources */
94     struct resource_list	ad_rl;
95 };
96 
97 #ifdef INTRNG
98 struct intr_map_data_acpi {
99 	struct intr_map_data	hdr;
100 	u_int			irq;
101 	u_int			pol;
102 	u_int			trig;
103 };
104 
105 #endif
106 
107 /* Track device (/dev/{apm,apmctl} and /dev/acpi) notification status. */
108 struct apm_clone_data {
109     STAILQ_ENTRY(apm_clone_data) entries;
110     struct cdev 	*cdev;
111     int			flags;
112 #define	ACPI_EVF_NONE	0	/* /dev/apm semantics */
113 #define	ACPI_EVF_DEVD	1	/* /dev/acpi is handled via devd(8) */
114 #define	ACPI_EVF_WRITE	2	/* Device instance is opened writable. */
115     int			notify_status;
116 #define	APM_EV_NONE	0	/* Device not yet aware of pending sleep. */
117 #define	APM_EV_NOTIFIED	1	/* Device saw next sleep state. */
118 #define	APM_EV_ACKED	2	/* Device agreed sleep can occur. */
119     struct acpi_softc	*acpi_sc;
120     struct selinfo	sel_read;
121 };
122 
123 #define ACPI_PRW_MAX_POWERRES	8
124 
125 struct acpi_prw_data {
126     ACPI_HANDLE		gpe_handle;
127     int			gpe_bit;
128     int			lowest_wake;
129     ACPI_OBJECT		power_res[ACPI_PRW_MAX_POWERRES];
130     int			power_res_count;
131 };
132 
133 /* Flags for each device defined in the AML namespace. */
134 #define ACPI_FLAG_WAKE_ENABLED	0x1
135 
136 /* Macros for extracting parts of a PCI address from an _ADR value. */
137 #define	ACPI_ADR_PCI_SLOT(adr)	(((adr) & 0xffff0000) >> 16)
138 #define	ACPI_ADR_PCI_FUNC(adr)	((adr) & 0xffff)
139 
140 /*
141  * Entry points to ACPI from above are global functions defined in this
142  * file, sysctls, and I/O on the control device.  Entry points from below
143  * are interrupts (the SCI), notifies, task queue threads, and the thermal
144  * zone polling thread.
145  *
146  * ACPI tables and global shared data are protected by a global lock
147  * (acpi_mutex).
148  *
149  * Each ACPI device can have its own driver-specific mutex for protecting
150  * shared access to local data.  The ACPI_LOCK macros handle mutexes.
151  *
152  * Drivers that need to serialize access to functions (e.g., to route
153  * interrupts, get/set control paths, etc.) should use the sx lock macros
154  * (ACPI_SERIAL).
155  *
156  * ACPI-CA handles its own locking and should not be called with locks held.
157  *
158  * The most complicated path is:
159  *     GPE -> EC runs _Qxx -> _Qxx reads EC space -> GPE
160  */
161 extern struct mtx			acpi_mutex;
162 #define ACPI_LOCK(sys)			mtx_lock(&sys##_mutex)
163 #define ACPI_UNLOCK(sys)		mtx_unlock(&sys##_mutex)
164 #define ACPI_LOCK_ASSERT(sys)		mtx_assert(&sys##_mutex, MA_OWNED);
165 #define ACPI_LOCK_DECL(sys, name)				\
166 	static struct mtx sys##_mutex;				\
167 	MTX_SYSINIT(sys##_mutex, &sys##_mutex, name, MTX_DEF)
168 #define ACPI_SERIAL_BEGIN(sys)		sx_xlock(&sys##_sxlock)
169 #define ACPI_SERIAL_END(sys)		sx_xunlock(&sys##_sxlock)
170 #define ACPI_SERIAL_ASSERT(sys)		sx_assert(&sys##_sxlock, SX_XLOCKED);
171 #define ACPI_SERIAL_DECL(sys, name)				\
172 	static struct sx sys##_sxlock;				\
173 	SX_SYSINIT(sys##_sxlock, &sys##_sxlock, name)
174 
175 /*
176  * ACPI CA does not define layers for non-ACPI CA drivers.
177  * We define some here within the range provided.
178  */
179 #define	ACPI_AC_ADAPTER		0x00010000
180 #define	ACPI_BATTERY		0x00020000
181 #define	ACPI_BUS		0x00040000
182 #define	ACPI_BUTTON		0x00080000
183 #define	ACPI_EC			0x00100000
184 #define	ACPI_FAN		0x00200000
185 #define	ACPI_POWERRES		0x00400000
186 #define	ACPI_PROCESSOR		0x00800000
187 #define	ACPI_THERMAL		0x01000000
188 #define	ACPI_TIMER		0x02000000
189 #define	ACPI_OEM		0x04000000
190 
191 /*
192  * Constants for different interrupt models used with acpi_SetIntrModel().
193  */
194 #define	ACPI_INTR_PIC		0
195 #define	ACPI_INTR_APIC		1
196 #define	ACPI_INTR_SAPIC		2
197 
198 /*
199  * Various features and capabilities for the acpi_get_features() method.
200  * In particular, these are used for the ACPI 3.0 _PDC and _OSC methods.
201  * See the Intel document titled "Intel Processor Vendor-Specific ACPI",
202  * number 302223-007.
203  */
204 #define	ACPI_CAP_PERF_MSRS	(1 << 0)  /* Intel SpeedStep PERF_CTL MSRs */
205 #define	ACPI_CAP_C1_IO_HALT	(1 << 1)  /* Intel C1 "IO then halt" sequence */
206 #define	ACPI_CAP_THR_MSRS	(1 << 2)  /* Intel OnDemand throttling MSRs */
207 #define	ACPI_CAP_SMP_SAME	(1 << 3)  /* MP C1, Px, and Tx (all the same) */
208 #define	ACPI_CAP_SMP_SAME_C3	(1 << 4)  /* MP C2 and C3 (all the same) */
209 #define	ACPI_CAP_SMP_DIFF_PX	(1 << 5)  /* MP Px (different, using _PSD) */
210 #define	ACPI_CAP_SMP_DIFF_CX	(1 << 6)  /* MP Cx (different, using _CSD) */
211 #define	ACPI_CAP_SMP_DIFF_TX	(1 << 7)  /* MP Tx (different, using _TSD) */
212 #define	ACPI_CAP_SMP_C1_NATIVE	(1 << 8)  /* MP C1 support other than halt */
213 #define	ACPI_CAP_SMP_C3_NATIVE	(1 << 9)  /* MP C2 and C3 support */
214 #define	ACPI_CAP_PX_HW_COORD	(1 << 11) /* Intel P-state HW coordination */
215 #define	ACPI_CAP_INTR_CPPC	(1 << 12) /* Native Interrupt Handling for
216 	     Collaborative Processor Performance Control notifications */
217 #define	ACPI_CAP_HW_DUTY_C	(1 << 13) /* Hardware Duty Cycling */
218 
219 /*
220  * Quirk flags.
221  *
222  * ACPI_Q_BROKEN: Disables all ACPI support.
223  * ACPI_Q_TIMER: Disables support for the ACPI timer.
224  * ACPI_Q_MADT_IRQ0: Specifies that ISA IRQ 0 is wired up to pin 0 of the
225  *	first APIC and that the MADT should force that by ignoring the PC-AT
226  *	compatible flag and ignoring overrides that redirect IRQ 0 to pin 2.
227  */
228 extern int	acpi_quirks;
229 #define ACPI_Q_OK		0
230 #define ACPI_Q_BROKEN		(1 << 0)
231 #define ACPI_Q_TIMER		(1 << 1)
232 #define ACPI_Q_MADT_IRQ0	(1 << 2)
233 
234 /*
235  * Plug and play information for device matching.  Matching table format
236  * is compatible with ids parameter of ACPI_ID_PROBE bus method.
237  *
238  * XXX: While ACPI_ID_PROBE matches against _HID and all _CIDs, current
239  *      acpi_pnpinfo() exports only _HID and first _CID.  That means second
240  *      and further _CIDs should be added to both acpi_pnpinfo() and
241  *      ACPICOMPAT_PNP_INFO if device matching against them is required.
242  */
243 #define	ACPICOMPAT_PNP_INFO(t, busname)					\
244 	MODULE_PNP_INFO("Z:_HID", busname, t##hid, t, nitems(t)-1);	\
245 	MODULE_PNP_INFO("Z:_CID", busname, t##cid, t, nitems(t)-1);
246 #define	ACPI_PNP_INFO(t)	ACPICOMPAT_PNP_INFO(t, acpi)
247 
248 /*
249  * Note that the low ivar values are reserved to provide
250  * interface compatibility with ISA drivers which can also
251  * attach to ACPI.
252  */
253 #define ACPI_IVAR_HANDLE	0x100
254 #define ACPI_IVAR_UNUSED	0x101	/* Unused/reserved. */
255 #define ACPI_IVAR_PRIVATE	0x102
256 #define ACPI_IVAR_FLAGS		0x103
257 
258 /*
259  * Accessor functions for our ivars.  Default value for BUS_READ_IVAR is
260  * (type) 0.  The <sys/bus.h> accessor functions don't check return values.
261  */
262 #define __ACPI_BUS_ACCESSOR(varp, var, ivarp, ivar, type)	\
263 								\
264 static __inline type varp ## _get_ ## var(device_t dev)		\
265 {								\
266     uintptr_t v = 0;						\
267     BUS_READ_IVAR(device_get_parent(dev), dev,			\
268 	ivarp ## _IVAR_ ## ivar, &v);				\
269     return ((type) v);						\
270 }								\
271 								\
272 static __inline void varp ## _set_ ## var(device_t dev, type t)	\
273 {								\
274     uintptr_t v = (uintptr_t) t;				\
275     BUS_WRITE_IVAR(device_get_parent(dev), dev,			\
276 	ivarp ## _IVAR_ ## ivar, v);				\
277 }
278 
279 __ACPI_BUS_ACCESSOR(acpi, handle, ACPI, HANDLE, ACPI_HANDLE)
280 __ACPI_BUS_ACCESSOR(acpi, private, ACPI, PRIVATE, void *)
281 __ACPI_BUS_ACCESSOR(acpi, flags, ACPI, FLAGS, int)
282 
283 void acpi_fake_objhandler(ACPI_HANDLE h, void *data);
284 static __inline device_t
285 acpi_get_device(ACPI_HANDLE handle)
286 {
287     void *dev = NULL;
288     AcpiGetData(handle, acpi_fake_objhandler, &dev);
289     return ((device_t)dev);
290 }
291 
292 static __inline ACPI_OBJECT_TYPE
293 acpi_get_type(device_t dev)
294 {
295     ACPI_HANDLE		h;
296     ACPI_OBJECT_TYPE	t;
297 
298     if ((h = acpi_get_handle(dev)) == NULL)
299 	return (ACPI_TYPE_NOT_FOUND);
300     if (ACPI_FAILURE(AcpiGetType(h, &t)))
301 	return (ACPI_TYPE_NOT_FOUND);
302     return (t);
303 }
304 
305 /* Find the difference between two PM tick counts. */
306 static __inline uint32_t
307 acpi_TimerDelta(uint32_t end, uint32_t start)
308 {
309 
310 	if (end < start && (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) == 0)
311 		end |= 0x01000000;
312 	return (end - start);
313 }
314 
315 #ifdef ACPI_DEBUGGER
316 void		acpi_EnterDebugger(void);
317 #endif
318 
319 #ifdef ACPI_DEBUG
320 #include <sys/cons.h>
321 #define STEP(x)		do {printf x, printf("\n"); cngetc();} while (0)
322 #else
323 #define STEP(x)
324 #endif
325 
326 #define ACPI_VPRINT(dev, acpi_sc, x...) do {			\
327     if (acpi_get_verbose(acpi_sc))				\
328 	device_printf(dev, x);					\
329 } while (0)
330 
331 /* Values for the first status word returned by _OSC. */
332 #define	ACPI_OSC_FAILURE	(1 << 1)
333 #define	ACPI_OSC_BAD_UUID	(1 << 2)
334 #define	ACPI_OSC_BAD_REVISION	(1 << 3)
335 #define	ACPI_OSC_CAPS_MASKED	(1 << 4)
336 
337 #define ACPI_DEVINFO_PRESENT(x, flags)					\
338 	(((x) & (flags)) == (flags))
339 #define ACPI_DEVICE_PRESENT(x)						\
340 	ACPI_DEVINFO_PRESENT(x, ACPI_STA_DEVICE_PRESENT |		\
341 	    ACPI_STA_DEVICE_FUNCTIONING)
342 #define ACPI_BATTERY_PRESENT(x)						\
343 	ACPI_DEVINFO_PRESENT(x, ACPI_STA_DEVICE_PRESENT |		\
344 	    ACPI_STA_DEVICE_FUNCTIONING | ACPI_STA_BATTERY_PRESENT)
345 
346 /* Callback function type for walking subtables within a table. */
347 typedef void acpi_subtable_handler(ACPI_SUBTABLE_HEADER *, void *);
348 
349 BOOLEAN		acpi_DeviceIsPresent(device_t dev);
350 BOOLEAN		acpi_BatteryIsPresent(device_t dev);
351 ACPI_STATUS	acpi_GetHandleInScope(ACPI_HANDLE parent, char *path,
352 		    ACPI_HANDLE *result);
353 ACPI_STATUS	acpi_GetProperty(device_t dev, ACPI_STRING propname,
354 		    const ACPI_OBJECT **value);
355 ACPI_BUFFER	*acpi_AllocBuffer(int size);
356 ACPI_STATUS	acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp,
357 		    UINT32 *number);
358 ACPI_STATUS	acpi_GetInteger(ACPI_HANDLE handle, char *path,
359 		    UINT32 *number);
360 ACPI_STATUS	acpi_SetInteger(ACPI_HANDLE handle, char *path,
361 		    UINT32 number);
362 ACPI_STATUS	acpi_ForeachPackageObject(ACPI_OBJECT *obj,
363 		    void (*func)(ACPI_OBJECT *comp, void *arg), void *arg);
364 ACPI_STATUS	acpi_FindIndexedResource(ACPI_BUFFER *buf, int index,
365 		    ACPI_RESOURCE **resp);
366 ACPI_STATUS	acpi_AppendBufferResource(ACPI_BUFFER *buf,
367 		    ACPI_RESOURCE *res);
368 UINT64		acpi_DSMQuery(ACPI_HANDLE h, const uint8_t *uuid,
369 		    int revision);
370 ACPI_STATUS	acpi_EvaluateDSM(ACPI_HANDLE handle, const uint8_t *uuid,
371 		    int revision, UINT64 function, ACPI_OBJECT *package,
372 		    ACPI_BUFFER *out_buf);
373 ACPI_STATUS	acpi_EvaluateDSMTyped(ACPI_HANDLE handle,
374 		    const uint8_t *uuid, int revision, UINT64 function,
375 		    ACPI_OBJECT *package, ACPI_BUFFER *out_buf,
376 		    ACPI_OBJECT_TYPE type);
377 ACPI_STATUS	acpi_EvaluateOSC(ACPI_HANDLE handle, uint8_t *uuid,
378 		    int revision, int count, uint32_t *caps_in,
379 		    uint32_t *caps_out, bool query);
380 ACPI_STATUS	acpi_OverrideInterruptLevel(UINT32 InterruptNumber);
381 ACPI_STATUS	acpi_SetIntrModel(int model);
382 int		acpi_ReqSleepState(struct acpi_softc *sc, int state);
383 int		acpi_AckSleepState(struct apm_clone_data *clone, int error);
384 ACPI_STATUS	acpi_SetSleepState(struct acpi_softc *sc, int state);
385 int		acpi_wake_set_enable(device_t dev, int enable);
386 int		acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw);
387 ACPI_STATUS	acpi_Startup(void);
388 void		acpi_UserNotify(const char *subsystem, ACPI_HANDLE h,
389 		    uint8_t notify);
390 int		acpi_bus_alloc_gas(device_t dev, int *type, int *rid,
391 		    ACPI_GENERIC_ADDRESS *gas, struct resource **res,
392 		    u_int flags);
393 void		acpi_walk_subtables(void *first, void *end,
394 		    acpi_subtable_handler *handler, void *arg);
395 BOOLEAN		acpi_has_hid(ACPI_HANDLE handle);
396 int		acpi_MatchHid(ACPI_HANDLE h, const char *hid);
397 #define ACPI_MATCHHID_NOMATCH 0
398 #define ACPI_MATCHHID_HID 1
399 #define ACPI_MATCHHID_CID 2
400 
401 static __inline bool
402 acpi_HasProperty(device_t dev, ACPI_STRING propname)
403 {
404 
405 	return ACPI_SUCCESS(acpi_GetProperty(dev, propname, NULL));
406 }
407 
408 struct acpi_parse_resource_set {
409     void	(*set_init)(device_t dev, void *arg, void **context);
410     void	(*set_done)(device_t dev, void *context);
411     void	(*set_ioport)(device_t dev, void *context, uint64_t base,
412 		    uint64_t length);
413     void	(*set_iorange)(device_t dev, void *context, uint64_t low,
414 		    uint64_t high, uint64_t length, uint64_t align);
415     void	(*set_memory)(device_t dev, void *context, uint64_t base,
416 		    uint64_t length);
417     void	(*set_memoryrange)(device_t dev, void *context, uint64_t low,
418 		    uint64_t high, uint64_t length, uint64_t align);
419     void	(*set_irq)(device_t dev, void *context, uint8_t *irq,
420 		    int count, int trig, int pol);
421     void	(*set_ext_irq)(device_t dev, void *context, uint32_t *irq,
422 		    int count, int trig, int pol);
423     void	(*set_drq)(device_t dev, void *context, uint8_t *drq,
424 		    int count);
425     void	(*set_start_dependent)(device_t dev, void *context,
426 		    int preference);
427     void	(*set_end_dependent)(device_t dev, void *context);
428 };
429 
430 extern struct	acpi_parse_resource_set acpi_res_parse_set;
431 
432 int		acpi_identify(void);
433 void		acpi_config_intr(device_t dev, ACPI_RESOURCE *res);
434 #ifdef INTRNG
435 int		acpi_map_intr(device_t dev, u_int irq, ACPI_HANDLE handle);
436 #endif
437 ACPI_STATUS	acpi_lookup_irq_resource(device_t dev, int rid,
438 		    struct resource *res, ACPI_RESOURCE *acpi_res);
439 ACPI_STATUS	acpi_parse_resources(device_t dev, ACPI_HANDLE handle,
440 		    struct acpi_parse_resource_set *set, void *arg);
441 struct resource *acpi_alloc_sysres(device_t child, int type, int *rid,
442 		    rman_res_t start, rman_res_t end, rman_res_t count,
443 		    u_int flags);
444 
445 /* ACPI event handling */
446 UINT32		acpi_event_power_button_sleep(void *context);
447 UINT32		acpi_event_power_button_wake(void *context);
448 UINT32		acpi_event_sleep_button_sleep(void *context);
449 UINT32		acpi_event_sleep_button_wake(void *context);
450 
451 #define ACPI_EVENT_PRI_FIRST      0
452 #define ACPI_EVENT_PRI_DEFAULT    10000
453 #define ACPI_EVENT_PRI_LAST       20000
454 
455 typedef void (*acpi_event_handler_t)(void *, int);
456 
457 EVENTHANDLER_DECLARE(acpi_sleep_event, acpi_event_handler_t);
458 EVENTHANDLER_DECLARE(acpi_wakeup_event, acpi_event_handler_t);
459 EVENTHANDLER_DECLARE(acpi_acad_event, acpi_event_handler_t);
460 EVENTHANDLER_DECLARE(acpi_video_event, acpi_event_handler_t);
461 
462 /* Device power control. */
463 ACPI_STATUS	acpi_pwr_wake_enable(ACPI_HANDLE consumer, int enable);
464 ACPI_STATUS	acpi_pwr_switch_consumer(ACPI_HANDLE consumer, int state);
465 int		acpi_device_pwr_for_sleep(device_t bus, device_t dev,
466 		    int *dstate);
467 int		acpi_set_powerstate(device_t child, int state);
468 
469 /* APM emulation */
470 void		acpi_apm_init(struct acpi_softc *);
471 
472 /* Misc. */
473 static __inline struct acpi_softc *
474 acpi_device_get_parent_softc(device_t child)
475 {
476     device_t	parent;
477 
478     parent = device_get_parent(child);
479     if (parent == NULL)
480 	return (NULL);
481     return (device_get_softc(parent));
482 }
483 
484 static __inline int
485 acpi_get_verbose(struct acpi_softc *sc)
486 {
487     if (sc)
488 	return (sc->acpi_verbose);
489     return (0);
490 }
491 
492 char		*acpi_name(ACPI_HANDLE handle);
493 int		acpi_avoid(ACPI_HANDLE handle);
494 int		acpi_disabled(char *subsys);
495 int		acpi_get_acpi_device_path(device_t bus, device_t child,
496 		    const char *locator, struct sbuf *sb);
497 int		acpi_machdep_init(device_t dev);
498 void		acpi_install_wakeup_handler(struct acpi_softc *sc);
499 int		acpi_sleep_machdep(struct acpi_softc *sc, int state);
500 int		acpi_wakeup_machdep(struct acpi_softc *sc, int state,
501 		    int sleep_result, int intr_enabled);
502 int		acpi_table_quirks(int *quirks);
503 int		acpi_machdep_quirks(int *quirks);
504 int		acpi_pnpinfo(ACPI_HANDLE handle, struct sbuf *sb);
505 
506 uint32_t	hpet_get_uid(device_t dev);
507 
508 /* Battery Abstraction. */
509 struct acpi_battinfo;
510 
511 int		acpi_battery_register(device_t dev);
512 int		acpi_battery_remove(device_t dev);
513 int		acpi_battery_get_units(void);
514 int		acpi_battery_get_info_expire(void);
515 int		acpi_battery_bst_valid(struct acpi_bst *bst);
516 int		acpi_battery_bix_valid(struct acpi_bix *bix);
517 int		acpi_battery_get_battinfo(device_t dev,
518 		    struct acpi_battinfo *info);
519 
520 /* Embedded controller. */
521 void		acpi_ec_ecdt_probe(device_t);
522 
523 /* AC adapter interface. */
524 int		acpi_acad_get_acline(int *);
525 
526 /* Package manipulation convenience functions. */
527 #define ACPI_PKG_VALID(pkg, size)				\
528     ((pkg) != NULL && (pkg)->Type == ACPI_TYPE_PACKAGE &&	\
529      (pkg)->Package.Count >= (size))
530 #define	ACPI_PKG_VALID_EQ(pkg, size)				\
531     ((pkg) != NULL && (pkg)->Type == ACPI_TYPE_PACKAGE &&	\
532      (pkg)->Package.Count == (size))
533 int		acpi_PkgInt(ACPI_OBJECT *res, int idx, UINT64 *dst);
534 int		acpi_PkgInt32(ACPI_OBJECT *res, int idx, uint32_t *dst);
535 int		acpi_PkgInt16(ACPI_OBJECT *res, int idx, uint16_t *dst);
536 int		acpi_PkgStr(ACPI_OBJECT *res, int idx, void *dst, size_t size);
537 int		acpi_PkgGas(device_t dev, ACPI_OBJECT *res, int idx, int *type,
538 		    int *rid, struct resource **dst, u_int flags);
539 int		acpi_PkgFFH_IntelCpu(ACPI_OBJECT *res, int idx, int *vendor,
540 		    int *class, uint64_t *address, int *accsize);
541 ACPI_HANDLE	acpi_GetReference(ACPI_HANDLE scope, ACPI_OBJECT *obj);
542 
543 /*
544  * Base level for BUS_ADD_CHILD.  Special devices are added at orders less
545  * than this, and normal devices at or above this level.  This keeps the
546  * probe order sorted so that things like sysresource are available before
547  * their children need them.
548  */
549 #define	ACPI_DEV_BASE_ORDER	100
550 
551 /* Default maximum number of tasks to enqueue. */
552 #ifndef ACPI_MAX_TASKS
553 #define	ACPI_MAX_TASKS		MAX(32, MAXCPU * 4)
554 #endif
555 
556 /* Default number of task queue threads to start. */
557 #ifndef ACPI_MAX_THREADS
558 #define ACPI_MAX_THREADS	3
559 #endif
560 
561 /* Use the device logging level for ktr(4). */
562 #define	KTR_ACPI		KTR_DEV
563 
564 SYSCTL_DECL(_debug_acpi);
565 
566 /*
567  * Parse and use proximity information in SRAT and SLIT.
568  */
569 int		acpi_pxm_init(int ncpus, vm_paddr_t maxphys);
570 void		acpi_pxm_parse_tables(void);
571 void		acpi_pxm_set_mem_locality(void);
572 void		acpi_pxm_set_cpu_locality(void);
573 int		acpi_pxm_get_cpu_locality(int apic_id);
574 
575 /*
576  * Map a PXM to a VM domain.
577  *
578  * Returns the VM domain ID if found, or -1 if not found / invalid.
579  */
580 int		acpi_map_pxm_to_vm_domainid(int pxm);
581 int		acpi_get_cpus(device_t dev, device_t child, enum cpu_sets op,
582 		    size_t setsize, cpuset_t *cpuset);
583 int		acpi_get_domain(device_t dev, device_t child, int *domain);
584 
585 #ifdef __aarch64__
586 /*
587  * ARM specific ACPI interfaces, relating to IORT table.
588  */
589 int	acpi_iort_map_pci_msi(u_int seg, u_int rid, u_int *xref, u_int *devid);
590 int	acpi_iort_map_pci_smmuv3(u_int seg, u_int rid, u_int *xref, u_int *devid);
591 int	acpi_iort_its_lookup(u_int its_id, u_int *xref, int *pxm);
592 int	acpi_iort_map_named_msi(const char *devname, u_int rid, u_int *xref,
593 	    u_int *devid);
594 int	acpi_iort_map_named_smmuv3(const char *devname, u_int rid, u_int *xref,
595 	    u_int *devid);
596 #endif
597 #endif /* _KERNEL */
598 #endif /* !_ACPIVAR_H_ */
599