DrvACPI.cpp@ 100713

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1	/* $Id: DrvACPI.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2	/** @file
3	* DrvACPI - ACPI Host Driver.
4	*/
5
6	/*
7	* Copyright (C) 2006-2023 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/*********************************************************************************************************************************
30	* Header Files *
31	*********************************************************************************************************************************/
32	#define LOG_GROUP LOG_GROUP_DRV_ACPI
33
34	#ifdef RT_OS_WINDOWS
35	# include <iprt/win/windows.h>
36	#endif
37
38	#include <VBox/vmm/pdmdrv.h>
39	#include <VBox/log.h>
40	#include <iprt/asm.h>
41	#include <iprt/assert.h>
42	#include <iprt/string.h>
43	#include <iprt/uuid.h>
44
45	#ifdef RT_OS_LINUX
46	# include <iprt/critsect.h>
47	# include <iprt/dir.h>
48	# include <iprt/semaphore.h>
49	# include <iprt/stream.h>
50	#endif
51
52	#ifdef RT_OS_DARWIN
53	# include <Carbon/Carbon.h>
54	# include <IOKit/ps/IOPowerSources.h>
55	# include <IOKit/ps/IOPSKeys.h>
56	# undef PVM /* This still messed up in the 10.9 SDK. Sigh. */
57	#endif
58
59	#ifdef RT_OS_FREEBSD
60	# include <sys/ioctl.h>
61	# include <dev/acpica/acpiio.h>
62	# include <sys/types.h>
63	# include <sys/sysctl.h>
64	# include <stdio.h>
65	# include <errno.h>
66	# include <fcntl.h>
67	# include <unistd.h>
68	#endif
69
70	#include "VBoxDD.h"
71
72
73	/*********************************************************************************************************************************
74	* Structures and Typedefs *
75	*********************************************************************************************************************************/
76	/**
77	* ACPI driver instance data.
78	*
79	* @implements PDMIACPICONNECTOR
80	*/
81	typedef struct DRVACPI
82	{
83	/** The ACPI interface. */
84	PDMIACPICONNECTOR IACPIConnector;
85	/** The ACPI port interface. */
86	PPDMIACPIPORT pPort;
87	/** Pointer to the driver instance. */
88	PPDMDRVINS pDrvIns;
89
90	#ifdef RT_OS_LINUX
91	/** The current power source. */
92	PDMACPIPOWERSOURCE enmPowerSource;
93	/** true = one or more batteries preset, false = no battery present. */
94	bool fBatteryPresent;
95	/** No need to RTThreadPoke the poller when set. */
96	bool volatile fDontPokePoller;
97	/** Remaining battery capacity. */
98	PDMACPIBATCAPACITY enmBatteryRemainingCapacity;
99	/** Battery state. */
100	PDMACPIBATSTATE enmBatteryState;
101	/** Preset battery charging/discharging rate. */
102	uint32_t u32BatteryPresentRate;
103	/** The poller thread. */
104	PPDMTHREAD pPollerThread;
105	/** Synchronize access to the above fields.
106	* XXX A spinlock is probably cheaper ... */
107	RTCRITSECT CritSect;
108	/** Event semaphore the poller thread is sleeping on. */
109	RTSEMEVENT hPollerSleepEvent;
110	#endif
111
112	} DRVACPI, *PDRVACPI;
113
114
115	/**
116	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
117	*/
118	static DECLCALLBACK(void ) drvACPIQueryInterface(PPDMIBASE pInterface, const char pszIID)
119	{
120	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
121	PDRVACPI pThis = PDMINS_2_DATA(pDrvIns, PDRVACPI);
122
123	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
124	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIACPICONNECTOR, &pThis->IACPIConnector);
125	return NULL;
126	}
127
128	/**
129	* Get the current power source of the host system.
130	*
131	* @returns status code
132	* @param pInterface Pointer to the interface structure containing the called function pointer.
133	* @param pPowerSource Pointer to the power source result variable.
134	*/
135	static DECLCALLBACK(int) drvACPIQueryPowerSource(PPDMIACPICONNECTOR pInterface,
136	PDMACPIPOWERSOURCE *pPowerSource)
137	{
138	#if defined(RT_OS_WINDOWS)
139	RT_NOREF(pInterface);
140	SYSTEM_POWER_STATUS powerStatus;
141	if (GetSystemPowerStatus(&powerStatus))
142	{
143	/* running on battery? */
144	if ( powerStatus.ACLineStatus == 0 /* Offline */
145	\|\| powerStatus.ACLineStatus == 255 /* Unknown */
146	&& (powerStatus.BatteryFlag & 15) /* high \| low \| critical \| charging */
147	) /** @todo why is 'charging' included in the flag test? Add parenthesis around the right bits so the code is clearer. */
148	{
149	*pPowerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
150	}
151	/* running on AC link? */
152	else if (powerStatus.ACLineStatus == 1)
153	{
154	*pPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
155	}
156	else
157	/* what the hell we're running on? */
158	{
159	*pPowerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
160	}
161	}
162	else
163	{
164	AssertMsgFailed(("Could not determine system power status, error: 0x%x\n",
165	GetLastError()));
166	*pPowerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
167	}
168
169	#elif defined (RT_OS_LINUX)
170	PDRVACPI pThis = RT_FROM_MEMBER(pInterface, DRVACPI, IACPIConnector);
171	RTCritSectEnter(&pThis->CritSect);
172	*pPowerSource = pThis->enmPowerSource;
173	RTCritSectLeave(&pThis->CritSect);
174
175	#elif defined (RT_OS_DARWIN)
176	RT_NOREF(pInterface);
177	*pPowerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
178
179	CFTypeRef pBlob = IOPSCopyPowerSourcesInfo();
180	CFArrayRef pSources = IOPSCopyPowerSourcesList(pBlob);
181
182	CFDictionaryRef pSource = NULL;
183	const void *psValue;
184	bool fResult;
185
186	if (CFArrayGetCount(pSources) > 0)
187	{
188	for (int i = 0; i < CFArrayGetCount(pSources); ++i)
189	{
190	pSource = IOPSGetPowerSourceDescription(pBlob, CFArrayGetValueAtIndex(pSources, i));
191	/* If the source is empty skip over to the next one. */
192	if(!pSource)
193	continue;
194	/* Skip all power sources which are currently not present like a
195	* second battery. */
196	if (CFDictionaryGetValue(pSource, CFSTR(kIOPSIsPresentKey)) == kCFBooleanFalse)
197	continue;
198	/* Only internal power types are of interest. */
199	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSTransportTypeKey), &psValue);
200	if ( fResult
201	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSInternalType), 0) == kCFCompareEqualTo)
202	{
203	/* Check which power source we are connect on. */
204	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSPowerSourceStateKey), &psValue);
205	if ( fResult
206	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSACPowerValue), 0) == kCFCompareEqualTo)
207	*pPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
208	else if ( fResult
209	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSBatteryPowerValue), 0) == kCFCompareEqualTo)
210	*pPowerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
211	}
212	}
213	}
214	CFRelease(pBlob);
215	CFRelease(pSources);
216
217	#elif defined(RT_OS_FREEBSD)
218	RT_NOREF(pInterface);
219	int fAcLine = 0;
220	size_t cbParameter = sizeof(fAcLine);
221
222	int rc = sysctlbyname("hw.acpi.acline", &fAcLine, &cbParameter, NULL, 0);
223
224	if (!rc)
225	{
226	if (fAcLine == 1)
227	*pPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
228	else if (fAcLine == 0)
229	*pPowerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
230	else
231	*pPowerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
232	}
233	else
234	{
235	AssertMsg(errno == ENOENT, ("rc=%d (%s)\n", rc, strerror(errno)));
236	*pPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
237	}
238	#else /* !RT_OS_FREEBSD either - what could this be? */
239	RT_NOREF(pInterface);
240	*pPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
241
242	#endif /* !RT_OS_FREEBSD */
243	return VINF_SUCCESS;
244	}
245
246	/**
247	* @interface_method_impl{PDMIACPICONNECTOR,pfnQueryBatteryStatus}
248	*/
249	static DECLCALLBACK(int) drvACPIQueryBatteryStatus(PPDMIACPICONNECTOR pInterface, bool *pfPresent,
250	PPDMACPIBATCAPACITY penmRemainingCapacity,
251	PPDMACPIBATSTATE penmBatteryState,
252	uint32_t *pu32PresentRate)
253	{
254	/* default return values for all architectures */
255	pfPresent = false; / no battery present */
256	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGED;
257	*penmRemainingCapacity = PDM_ACPI_BAT_CAPACITY_UNKNOWN;
258	pu32PresentRate = UINT32_MAX; / present rate is unknown */
259
260	#if defined(RT_OS_WINDOWS)
261	RT_NOREF(pInterface);
262	SYSTEM_POWER_STATUS powerStatus;
263	if (GetSystemPowerStatus(&powerStatus))
264	{
265	/* 128 means no battery present */
266	*pfPresent = !(powerStatus.BatteryFlag & 128);
267	/* just forward the value directly */
268	*penmRemainingCapacity = (PDMACPIBATCAPACITY)powerStatus.BatteryLifePercent;
269	/* we assume that we are discharging the battery if we are not on-line and
270	* not charge the battery */
271	uint32_t uBs = PDM_ACPI_BAT_STATE_CHARGED;
272	if (powerStatus.BatteryFlag & 8)
273	uBs = PDM_ACPI_BAT_STATE_CHARGING;
274	else if (powerStatus.ACLineStatus == 0 \|\| powerStatus.ACLineStatus == 255)
275	uBs = PDM_ACPI_BAT_STATE_DISCHARGING;
276	if (powerStatus.BatteryFlag & 4)
277	uBs \|= PDM_ACPI_BAT_STATE_CRITICAL;
278	*penmBatteryState = (PDMACPIBATSTATE)uBs;
279	/* on Windows it is difficult to request the present charging/discharging rate */
280	}
281	else
282	{
283	AssertMsgFailed(("Could not determine system power status, error: 0x%x\n",
284	GetLastError()));
285	}
286
287	#elif defined(RT_OS_LINUX)
288	PDRVACPI pThis = RT_FROM_MEMBER(pInterface, DRVACPI, IACPIConnector);
289	RTCritSectEnter(&pThis->CritSect);
290	*pfPresent = pThis->fBatteryPresent;
291	*penmRemainingCapacity = pThis->enmBatteryRemainingCapacity;
292	*penmBatteryState = pThis->enmBatteryState;
293	*pu32PresentRate = pThis->u32BatteryPresentRate;
294	RTCritSectLeave(&pThis->CritSect);
295
296	#elif defined(RT_OS_DARWIN)
297	RT_NOREF(pInterface);
298	CFTypeRef pBlob = IOPSCopyPowerSourcesInfo();
299	CFArrayRef pSources = IOPSCopyPowerSourcesList(pBlob);
300
301	CFDictionaryRef pSource = NULL;
302	const void *psValue;
303	bool fResult;
304
305	if (CFArrayGetCount(pSources) > 0)
306	{
307	for (int i = 0; i < CFArrayGetCount(pSources); ++i)
308	{
309	pSource = IOPSGetPowerSourceDescription(pBlob, CFArrayGetValueAtIndex(pSources, i));
310	/* If the source is empty skip over to the next one. */
311	if(!pSource)
312	continue;
313	/* Skip all power sources which are currently not present like a
314	* second battery. */
315	if (CFDictionaryGetValue(pSource, CFSTR(kIOPSIsPresentKey)) == kCFBooleanFalse)
316	continue;
317	/* Only internal power types are of interest. */
318	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSTransportTypeKey), &psValue);
319	if ( fResult
320	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSInternalType), 0) == kCFCompareEqualTo)
321	{
322	PDMACPIPOWERSOURCE powerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
323	/* First check which power source we are connect on. */
324	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSPowerSourceStateKey), &psValue);
325	if ( fResult
326	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSACPowerValue), 0) == kCFCompareEqualTo)
327	powerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
328	else if ( fResult
329	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSBatteryPowerValue), 0) == kCFCompareEqualTo)
330	powerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
331
332	/* At this point the power source is present. */
333	*pfPresent = true;
334	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGED;
335
336	int curCapacity = 0;
337	int maxCapacity = 1;
338	float remCapacity = 0.0f;
339
340	/* Fetch the current capacity value of the power source */
341	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSCurrentCapacityKey), &psValue);
342	if (fResult)
343	CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &curCapacity);
344	/* Fetch the maximum capacity value of the power source */
345	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSMaxCapacityKey), &psValue);
346	if (fResult)
347	CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &maxCapacity);
348
349	/* Calculate the remaining capacity in percent */
350	remCapacity = ((float)curCapacity/(float)maxCapacity * PDM_ACPI_BAT_CAPACITY_MAX);
351	*penmRemainingCapacity = (PDMACPIBATCAPACITY)remCapacity;
352
353	if (powerSource == PDM_ACPI_POWER_SOURCE_BATTERY)
354	{
355	/* If we are on battery power we are discharging in every
356	* case */
357	*penmBatteryState = PDM_ACPI_BAT_STATE_DISCHARGING;
358	int timeToEmpty = -1;
359	/* Get the time till the battery source will be empty */
360	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSTimeToEmptyKey), &psValue);
361	if (fResult)
362	CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &timeToEmpty);
363	if (timeToEmpty != -1)
364	/* 0...1000 */
365	pu32PresentRate = (uint32_t)roundf((remCapacity / ((float)timeToEmpty/60.0)) 10.0);
366	}
367
368	if ( powerSource == PDM_ACPI_POWER_SOURCE_OUTLET
369	&& CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSIsChargingKey), &psValue))
370	{
371	/* We are running on an AC power source, but we also have a
372	* battery power source present. */
373	if (CFBooleanGetValue((CFBooleanRef)psValue) > 0)
374	{
375	/* This means charging. */
376	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGING;
377	int timeToFull = -1;
378	/* Get the time till the battery source will be charged */
379	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSTimeToFullChargeKey), &psValue);
380	if (fResult)
381	CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &timeToFull);
382	if (timeToFull != -1)
383	/* 0...1000 */
384	pu32PresentRate = (uint32_t)roundf((100.0-(float)remCapacity) / ((float)timeToFull/60.0)) 10.0;
385	}
386	}
387
388	/* Check for critical */
389	int criticalValue = 20;
390	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSDeadWarnLevelKey), &psValue);
391	if (fResult)
392	CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &criticalValue);
393	if (remCapacity < criticalValue)
394	penmBatteryState = (PDMACPIBATSTATE)(penmBatteryState \| PDM_ACPI_BAT_STATE_CRITICAL);
395	}
396	}
397	}
398	CFRelease(pBlob);
399	CFRelease(pSources);
400
401	#elif defined(RT_OS_FREEBSD)
402	RT_NOREF(pInterface);
403	/* We try to use /dev/acpi first and if that fails use the sysctls. */
404	bool fSuccess = true;
405	int FileAcpi = 0;
406	int rc = 0;
407
408	FileAcpi = open("/dev/acpi", O_RDONLY);
409	if (FileAcpi != -1)
410	{
411	bool fMilliWatt;
412	union acpi_battery_ioctl_arg BatteryIo;
413
414	memset(&BatteryIo, 0, sizeof(BatteryIo));
415	BatteryIo.unit = 0; /* Always use the first battery. */
416
417	/* Determine the power units first. */
418	if (ioctl(FileAcpi, ACPIIO_BATT_GET_BIF, &BatteryIo) == -1)
419	fSuccess = false;
420	else
421	{
422	if (BatteryIo.bif.units == ACPI_BIF_UNITS_MW)
423	fMilliWatt = true;
424	else
425	fMilliWatt = false; /* mA */
426
427	BatteryIo.unit = 0;
428	if (ioctl(FileAcpi, ACPIIO_BATT_GET_BATTINFO, &BatteryIo) == -1)
429	fSuccess = false;
430	else
431	{
432	if ((BatteryIo.battinfo.state & ACPI_BATT_STAT_NOT_PRESENT) == ACPI_BATT_STAT_NOT_PRESENT)
433	*pfPresent = false;
434	else
435	{
436	*pfPresent = true;
437
438	if (BatteryIo.battinfo.state & ACPI_BATT_STAT_DISCHARG)
439	*penmBatteryState = PDM_ACPI_BAT_STATE_DISCHARGING;
440	else if (BatteryIo.battinfo.state & ACPI_BATT_STAT_CHARGING)
441	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGING;
442	else
443	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGED;
444
445	if (BatteryIo.battinfo.state & ACPI_BATT_STAT_CRITICAL)
446	penmBatteryState = (PDMACPIBATSTATE)(penmBatteryState \| PDM_ACPI_BAT_STATE_CRITICAL);
447	}
448
449	if (BatteryIo.battinfo.cap != -1)
450	*penmRemainingCapacity = (PDMACPIBATCAPACITY)BatteryIo.battinfo.cap;
451
452	BatteryIo.unit = 0;
453	if (ioctl(FileAcpi, ACPIIO_BATT_GET_BST, &BatteryIo) == 0)
454	{
455	/* The rate can be either mW or mA but the ACPI device wants mW. */
456	if (BatteryIo.bst.rate != 0xffffffff)
457	{
458	if (fMilliWatt)
459	*pu32PresentRate = BatteryIo.bst.rate;
460	else if (BatteryIo.bst.volt != 0xffffffff)
461	{
462	/*
463	* The rate is in mA so we have to convert it.
464	* The current power rate can be calculated with P = U * I
465	*/
466	*pu32PresentRate = (uint32_t)( ( ((float)BatteryIo.bst.volt/1000.0)
467	* ((float)BatteryIo.bst.rate/1000.0))
468	* 1000.0);
469	}
470	}
471	}
472	}
473	}
474
475	close(FileAcpi);
476	}
477	else
478	fSuccess = false;
479
480	if (!fSuccess)
481	{
482	int fBatteryState = 0;
483	size_t cbParameter = sizeof(fBatteryState);
484
485	rc = sysctlbyname("hw.acpi.battery.state", &fBatteryState, &cbParameter, NULL, 0);
486	if (!rc)
487	{
488	if ((fBatteryState & ACPI_BATT_STAT_NOT_PRESENT) == ACPI_BATT_STAT_NOT_PRESENT)
489	*pfPresent = false;
490	else
491	{
492	*pfPresent = true;
493
494	if (fBatteryState & ACPI_BATT_STAT_DISCHARG)
495	*penmBatteryState = PDM_ACPI_BAT_STATE_DISCHARGING;
496	else if (fBatteryState & ACPI_BATT_STAT_CHARGING)
497	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGING;
498	else
499	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGED;
500
501	if (fBatteryState & ACPI_BATT_STAT_CRITICAL)
502	penmBatteryState = (PDMACPIBATSTATE)(penmBatteryState \| PDM_ACPI_BAT_STATE_CRITICAL);
503
504	/* Get battery level. */
505	int curCapacity = 0;
506	cbParameter = sizeof(curCapacity);
507	rc = sysctlbyname("hw.acpi.battery.life", &curCapacity, &cbParameter, NULL, 0);
508	if (!rc && curCapacity >= 0)
509	*penmRemainingCapacity = (PDMACPIBATCAPACITY)curCapacity;
510
511	/* The rate can't be determined with sysctls. */
512	}
513	}
514	}
515
516	#endif /* RT_OS_FREEBSD */
517
518	return VINF_SUCCESS;
519	}
520
521	#ifdef RT_OS_LINUX
522	/**
523	* Poller thread for /proc/acpi status files.
524	*
525	* Reading these files takes ages (several seconds) on some hosts, therefore
526	* start this thread. The termination of this thread may take some seconds
527	* on such a hosts!
528	*
529	* @param pDrvIns The driver instance data.
530	* @param pThread The thread.
531	*/
532	static DECLCALLBACK(int) drvACPIPoller(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
533	{
534	PDRVACPI pThis = PDMINS_2_DATA(pDrvIns, PDRVACPI);
535
536	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
537	return VINF_SUCCESS;
538
539	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
540	{
541	ASMAtomicWriteBool(&pThis->fDontPokePoller, false);
542
543	PDMACPIPOWERSOURCE enmPowerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
544	PRTSTREAM pStrmStatus;
545	PRTSTREAM pStrmType;
546	RTDIR hDir = NIL_RTDIR;
547	RTDIRENTRY DirEntry;
548	char szLine[1024];
549	bool fBatteryPresent = false; /* one or more batteries present */
550	bool fCharging = false; /* one or more batteries charging */
551	bool fDischarging = false; /* one or more batteries discharging */
552	bool fCritical = false; /* one or more batteries in critical state */
553	bool fDataChanged; /* if battery status data changed during last poll */
554	int32_t maxCapacityTotal = 0; /* total capacity of all batteries */
555	int32_t currentCapacityTotal = 0; /* total current capacity of all batteries */
556	int32_t presentRateTotal = 0; /* total present (dis)charging rate of all batts */
557	PDMACPIBATCAPACITY enmBatteryRemainingCapacity; /* total remaining capacity of vbox batt */
558	uint32_t u32BatteryPresentRate; /* total present (dis)charging rate of vbox batt */
559
560	int rc = RTDirOpen(&hDir, "/sys/class/power_supply/");
561	if (RT_SUCCESS(rc))
562	{
563	/*
564	* The new /sys interface introduced with Linux 2.6.25.
565	*/
566	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
567	{
568	rc = RTDirRead(hDir, &DirEntry, NULL);
569	if (RT_FAILURE(rc))
570	break;
571	if ( strcmp(DirEntry.szName, ".") == 0
572	\|\| strcmp(DirEntry.szName, "..") == 0)
573	continue;
574	#define POWER_OPEN(s, n) RTStrmOpenF("r", s, "/sys/class/power_supply/%s/" n, DirEntry.szName)
575	rc = POWER_OPEN(&pStrmType, "type");
576	if (RT_FAILURE(rc))
577	continue;
578	rc = RTStrmGetLine(pStrmType, szLine, sizeof(szLine));
579	if (RT_SUCCESS(rc))
580	{
581	if (strcmp(szLine, "Mains") == 0)
582	{
583	/* AC adapter */
584	rc = POWER_OPEN(&pStrmStatus, "online");
585	if (RT_SUCCESS(rc))
586	{
587	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
588	if ( RT_SUCCESS(rc)
589	&& strcmp(szLine, "1") == 0)
590	enmPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
591	else
592	enmPowerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
593	RTStrmClose(pStrmStatus);
594	}
595	}
596	else if (strcmp(szLine, "Battery") == 0)
597	{
598	/* Battery */
599	rc = POWER_OPEN(&pStrmStatus, "present");
600	if (RT_SUCCESS(rc))
601	{
602	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
603	RTStrmClose(pStrmStatus);
604	if ( RT_SUCCESS(rc)
605	&& strcmp(szLine, "1") == 0)
606	{
607	fBatteryPresent = true;
608	rc = RTStrmOpenF("r", &pStrmStatus,
609	"/sys/class/power_supply/%s/status", DirEntry.szName);
610	if (RT_SUCCESS(rc))
611	{
612	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
613	if (RT_SUCCESS(rc))
614	{
615	if (strcmp(szLine, "Discharging") == 0)
616	fDischarging = true;
617	else if (strcmp(szLine, "Charging") == 0)
618	fCharging = true;
619	}
620	RTStrmClose(pStrmStatus);
621	}
622	rc = POWER_OPEN(&pStrmStatus, "capacity_level");
623	if (RT_SUCCESS(rc))
624	{
625	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
626	if ( RT_SUCCESS(rc)
627	&& strcmp(szLine, "Critical") == 0)
628	fCritical = true;
629	RTStrmClose(pStrmStatus);
630	}
631	rc = POWER_OPEN(&pStrmStatus, "energy_full");
632	if (RT_FAILURE(rc))
633	rc = POWER_OPEN(&pStrmStatus, "charge_full");
634	if (RT_SUCCESS(rc))
635	{
636	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
637	if (RT_SUCCESS(rc))
638	{
639	int32_t maxCapacity = 0;
640	rc = RTStrToInt32Full(szLine, 0, &maxCapacity);
641	if ( RT_SUCCESS(rc)
642	&& maxCapacity > 0)
643	maxCapacityTotal += maxCapacity;
644	}
645	RTStrmClose(pStrmStatus);
646	}
647	rc = POWER_OPEN(&pStrmStatus, "energy_now");
648	if (RT_FAILURE(rc))
649	rc = POWER_OPEN(&pStrmStatus, "charge_now");
650	if (RT_SUCCESS(rc))
651	{
652	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
653	if (RT_SUCCESS(rc))
654	{
655	int32_t currentCapacity = 0;
656	rc = RTStrToInt32Full(szLine, 0, &currentCapacity);
657	if ( RT_SUCCESS(rc)
658	&& currentCapacity > 0)
659	currentCapacityTotal += currentCapacity;
660	}
661	RTStrmClose(pStrmStatus);
662	}
663	rc = POWER_OPEN(&pStrmStatus, "power_now");
664	if (RT_FAILURE(rc))
665	rc = POWER_OPEN(&pStrmStatus, "current_now");
666	if (RT_SUCCESS(rc))
667	{
668	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
669	if (RT_SUCCESS(rc))
670	{
671	int32_t presentRate = 0;
672	rc = RTStrToInt32Full(szLine, 0, &presentRate);
673	if ( RT_SUCCESS(rc)
674	&& presentRate > 0)
675	{
676	if (fDischarging)
677	presentRateTotal -= presentRate;
678	else
679	presentRateTotal += presentRate;
680	}
681	}
682	RTStrmClose(pStrmStatus);
683	}
684	}
685	}
686	}
687	}
688	RTStrmClose(pStrmType);
689	#undef POWER_OPEN
690	}
691	RTDirClose(hDir);
692	}
693	else /* !/sys */
694	{
695	/*
696	* The old /proc/acpi interface
697	*/
698	/*
699	* Read the status of the powerline-adapter.
700	*/
701	rc = RTDirOpen(&hDir, "/proc/acpi/ac_adapter/");
702	if (RT_SUCCESS(rc))
703	{
704	#define POWER_OPEN(s, n) RTStrmOpenF("r", s, "/proc/acpi/ac_adapter/%s/" n, DirEntry.szName)
705	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
706	{
707	rc = RTDirRead(hDir, &DirEntry, NULL);
708	if (RT_FAILURE(rc))
709	break;
710	if ( strcmp(DirEntry.szName, ".") == 0
711	\|\| strcmp(DirEntry.szName, "..") == 0)
712	continue;
713	rc = POWER_OPEN(&pStrmStatus, "status");
714	if (RT_FAILURE(rc))
715	rc = POWER_OPEN(&pStrmStatus, "state");
716	if (RT_SUCCESS(rc))
717	{
718	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
719	{
720	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
721	if (RT_FAILURE(rc))
722	break;
723	if ( strstr(szLine, "Status:") != NULL
724	\|\| strstr(szLine, "state:") != NULL)
725	{
726	if (strstr(szLine, "on-line") != NULL)
727	enmPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
728	else
729	enmPowerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
730	break;
731	}
732	}
733	RTStrmClose(pStrmStatus);
734	break;
735	}
736	}
737	RTDirClose(hDir);
738	#undef POWER_OPEN
739	}
740
741	/*
742	* Read the status of all batteries and collect it into one.
743	*/
744	rc = RTDirOpen(&hDir, "/proc/acpi/battery/");
745	if (RT_SUCCESS(rc))
746	{
747	#define POWER_OPEN(s, n) RTStrmOpenF("r", s, "/proc/acpi/battery/%s/" n, DirEntry.szName)
748	bool fThisBatteryPresent = false;
749	bool fThisDischarging = false;
750
751	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
752	{
753	rc = RTDirRead(hDir, &DirEntry, NULL);
754	if (RT_FAILURE(rc))
755	break;
756	if ( strcmp(DirEntry.szName, ".") == 0
757	\|\| strcmp(DirEntry.szName, "..") == 0)
758	continue;
759
760	rc = POWER_OPEN(&pStrmStatus, "status");
761	/* there is a 2nd variant of that file */
762	if (RT_FAILURE(rc))
763	rc = POWER_OPEN(&pStrmStatus, "state");
764	if (RT_FAILURE(rc))
765	continue;
766
767	PRTSTREAM pStrmInfo;
768	rc = POWER_OPEN(&pStrmInfo, "info");
769	if (RT_FAILURE(rc))
770	{
771	RTStrmClose(pStrmStatus);
772	continue;
773	}
774
775	/* get 'present' status from the info file */
776	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
777	{
778	rc = RTStrmGetLine(pStrmInfo, szLine, sizeof(szLine));
779	if (RT_FAILURE(rc))
780	break;
781	if (strstr(szLine, "present:") != NULL)
782	{
783	if (strstr(szLine, "yes") != NULL)
784	{
785	fThisBatteryPresent = true;
786	break;
787	}
788	}
789	}
790
791	if (fThisBatteryPresent)
792	{
793	fBatteryPresent = true;
794	RTStrmRewind(pStrmInfo);
795
796	/* get the maximum capacity from the info file */
797	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
798	{
799	rc = RTStrmGetLine(pStrmInfo, szLine, sizeof(szLine));
800	if (RT_FAILURE(rc))
801	break;
802	if (strstr(szLine, "last full capacity:") != NULL)
803	{
804	char *psz;
805	int32_t maxCapacity = 0;
806	rc = RTStrToInt32Ex(RTStrStripL(&szLine[19]), &psz, 0, &maxCapacity);
807	if (RT_FAILURE(rc))
808	maxCapacity = 0;
809	maxCapacityTotal += maxCapacity;
810	break;
811	}
812	}
813
814	/* get the current capacity/state from the status file */
815	int32_t presentRate = 0;
816	bool fGotRemainingCapacity = false;
817	bool fGotBatteryState = false;
818	bool fGotCapacityState = false;
819	bool fGotPresentRate = false;
820	while ( ( !fGotRemainingCapacity
821	\|\| !fGotBatteryState
822	\|\| !fGotCapacityState
823	\|\| !fGotPresentRate)
824	&& pThread->enmState == PDMTHREADSTATE_RUNNING)
825	{
826	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
827	if (RT_FAILURE(rc))
828	break;
829	if (strstr(szLine, "remaining capacity:") != NULL)
830	{
831	char *psz;
832	int32_t currentCapacity = 0;
833	rc = RTStrToInt32Ex(RTStrStripL(&szLine[19]), &psz, 0, &currentCapacity);
834	if ( RT_SUCCESS(rc)
835	&& currentCapacity > 0)
836	currentCapacityTotal += currentCapacity;
837	fGotRemainingCapacity = true;
838	}
839	else if (strstr(szLine, "charging state:") != NULL)
840	{
841	if (strstr(szLine + 15, "discharging") != NULL)
842	{
843	fDischarging = true;
844	fThisDischarging = true;
845	}
846	else if (strstr(szLine + 15, "charging") != NULL)
847	fCharging = true;
848	fGotBatteryState = true;
849	}
850	else if (strstr(szLine, "capacity state:") != NULL)
851	{
852	if (strstr(szLine + 15, "critical") != NULL)
853	fCritical = true;
854	fGotCapacityState = true;
855	}
856	if (strstr(szLine, "present rate:") != NULL)
857	{
858	char *psz;
859	rc = RTStrToInt32Ex(RTStrStripL(&szLine[13]), &psz, 0, &presentRate);
860	if (RT_FAILURE(rc))
861	presentRate = 0;
862	fGotPresentRate = true;
863	}
864	}
865	if (fThisDischarging)
866	presentRateTotal -= presentRate;
867	else
868	presentRateTotal += presentRate;
869	}
870	RTStrmClose(pStrmStatus);
871	RTStrmClose(pStrmInfo);
872	}
873	RTDirClose(hDir);
874	#undef POWER_OPEN
875	}
876	} /* /proc/acpi */
877
878	/* atomic update of the state */
879	RTCritSectEnter(&pThis->CritSect);
880
881	/* charging/discharging bits are mutual exclusive */
882	uint32_t uBs = PDM_ACPI_BAT_STATE_CHARGED;
883	if (fDischarging)
884	uBs = PDM_ACPI_BAT_STATE_DISCHARGING;
885	else if (fCharging)
886	uBs = PDM_ACPI_BAT_STATE_CHARGING;
887	if (fCritical)
888	uBs \|= PDM_ACPI_BAT_STATE_CRITICAL;
889
890	if (maxCapacityTotal > 0 && currentCapacityTotal > 0)
891	{
892	if (presentRateTotal < 0)
893	presentRateTotal = -presentRateTotal;
894
895	/* calculate the percentage */
896
897	enmBatteryRemainingCapacity =
898	(PDMACPIBATCAPACITY)( ( (float)currentCapacityTotal
899	/ (float)maxCapacityTotal)
900	* PDM_ACPI_BAT_CAPACITY_MAX);
901	u32BatteryPresentRate =
902	(uint32_t)(( (float)presentRateTotal
903	/ (float)maxCapacityTotal) * 1000);
904	}
905	else
906	{
907	/* unknown capacity / state */
908	enmBatteryRemainingCapacity = PDM_ACPI_BAT_CAPACITY_UNKNOWN;
909	u32BatteryPresentRate = ~0;
910	}
911
912	if ( pThis->enmPowerSource == enmPowerSource
913	&& pThis->fBatteryPresent == fBatteryPresent
914	&& pThis->enmBatteryState == (PDMACPIBATSTATE) uBs
915	&& pThis->enmBatteryRemainingCapacity == enmBatteryRemainingCapacity
916	&& pThis->u32BatteryPresentRate == u32BatteryPresentRate)
917	{
918	fDataChanged = false;
919	}
920	else
921	{
922	fDataChanged = true;
923
924	pThis->enmPowerSource = enmPowerSource;
925	pThis->fBatteryPresent = fBatteryPresent;
926	pThis->enmBatteryState = (PDMACPIBATSTATE)uBs;
927	pThis->enmBatteryRemainingCapacity = enmBatteryRemainingCapacity;
928	pThis->u32BatteryPresentRate = u32BatteryPresentRate;
929	}
930
931	RTCritSectLeave(&pThis->CritSect);
932
933	if (fDataChanged)
934	pThis->pPort->pfnBatteryStatusChangeEvent(pThis->pPort);
935
936	/* wait a bit (e.g. Ubuntu/GNOME polls every 30 seconds) */
937	ASMAtomicWriteBool(&pThis->fDontPokePoller, true);
938	rc = RTSemEventWait(pThis->hPollerSleepEvent, 20000);
939	}
940
941	return VINF_SUCCESS;
942	}
943
944	static DECLCALLBACK(int) drvACPIPollerWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
945	{
946	PDRVACPI pThis = PDMINS_2_DATA(pDrvIns, PDRVACPI);
947
948	RTSemEventSignal(pThis->hPollerSleepEvent);
949	if (!ASMAtomicReadBool(&pThis->fDontPokePoller))
950	RTThreadPoke(pThread->Thread);
951	return VINF_SUCCESS;
952	}
953	#endif /* RT_OS_LINUX */
954
955
956	/**
957	* Destruct a driver instance.
958	*
959	* Most VM resources are freed by the VM. This callback is provided so that any non-VM
960	* resources can be freed correctly.
961	*
962	* @param pDrvIns The driver instance data.
963	*/
964	static DECLCALLBACK(void) drvACPIDestruct(PPDMDRVINS pDrvIns)
965	{
966	LogFlow(("drvACPIDestruct\n"));
967	PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
968
969	#ifdef RT_OS_LINUX
970	PDRVACPI pThis = PDMINS_2_DATA(pDrvIns, PDRVACPI);
971	if (pThis->hPollerSleepEvent != NIL_RTSEMEVENT)
972	{
973	RTSemEventDestroy(pThis->hPollerSleepEvent);
974	pThis->hPollerSleepEvent = NIL_RTSEMEVENT;
975	}
976	RTCritSectDelete(&pThis->CritSect);
977	#endif
978	}
979
980	/**
981	* Construct an ACPI driver instance.
982	*
983	* @copydoc FNPDMDRVCONSTRUCT
984	*/
985	static DECLCALLBACK(int) drvACPIConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
986	{
987	RT_NOREF(pCfg, fFlags);
988	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
989	PDRVACPI pThis = PDMINS_2_DATA(pDrvIns, PDRVACPI);
990	int rc = VINF_SUCCESS;
991
992	/*
993	* Init the static parts.
994	*/
995	pThis->pDrvIns = pDrvIns;
996	#ifdef RT_OS_LINUX
997	pThis->hPollerSleepEvent = NIL_RTSEMEVENT;
998	#endif
999	/* IBase */
1000	pDrvIns->IBase.pfnQueryInterface = drvACPIQueryInterface;
1001	/* IACPIConnector */
1002	pThis->IACPIConnector.pfnQueryPowerSource = drvACPIQueryPowerSource;
1003	pThis->IACPIConnector.pfnQueryBatteryStatus = drvACPIQueryBatteryStatus;
1004
1005	/*
1006	* Validate the config.
1007	*/
1008	PDMDRV_VALIDATE_CONFIG_RETURN(pDrvIns, "", "");
1009
1010	/*
1011	* Check that no-one is attached to us.
1012	*/
1013	AssertMsgReturn(PDMDrvHlpNoAttach(pDrvIns) == VERR_PDM_NO_ATTACHED_DRIVER,
1014	("Configuration error: Not possible to attach anything to this driver!\n"),
1015	VERR_PDM_DRVINS_NO_ATTACH);
1016
1017	/*
1018	* Query the ACPI port interface.
1019	*/
1020	pThis->pPort = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMIACPIPORT);
1021	if (!pThis->pPort)
1022	{
1023	AssertMsgFailed(("Configuration error: the above device/driver didn't export the ACPI port interface!\n"));
1024	return VERR_PDM_MISSING_INTERFACE_ABOVE;
1025	}
1026
1027	#ifdef RT_OS_LINUX
1028	/*
1029	* Start the poller thread.
1030	*/
1031	rc = PDMDrvHlpThreadCreate(pDrvIns, &pThis->pPollerThread, pThis, drvACPIPoller,
1032	drvACPIPollerWakeup, 0, RTTHREADTYPE_INFREQUENT_POLLER, "ACPI Poller");
1033	if (RT_FAILURE(rc))
1034	return rc;
1035
1036	rc = RTCritSectInit(&pThis->CritSect);
1037	if (RT_FAILURE(rc))
1038	return rc;
1039
1040	rc = RTSemEventCreate(&pThis->hPollerSleepEvent);
1041	#endif
1042
1043	return rc;
1044	}
1045
1046
1047	/**
1048	* ACPI driver registration record.
1049	*/
1050	const PDMDRVREG g_DrvACPI =
1051	{
1052	/* u32Version */
1053	PDM_DRVREG_VERSION,
1054	/* szName */
1055	"ACPIHost",
1056	/* szRCMod */
1057	"",
1058	/* szR0Mod */
1059	"",
1060	/* pszDescription */
1061	"ACPI Host Driver",
1062	/* fFlags */
1063	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
1064	/* fClass. */
1065	PDM_DRVREG_CLASS_ACPI,
1066	/* cMaxInstances */
1067	~0U,
1068	/* cbInstance */
1069	sizeof(DRVACPI),
1070	/* pfnConstruct */
1071	drvACPIConstruct,
1072	/* pfnDestruct */
1073	drvACPIDestruct,
1074	/* pfnRelocate */
1075	NULL,
1076	/* pfnIOCtl */
1077	NULL,
1078	/* pfnPowerOn */
1079	NULL,
1080	/* pfnReset */
1081	NULL,
1082	/* pfnSuspend */
1083	NULL,
1084	/* pfnResume */
1085	NULL,
1086	/* pfnAttach */
1087	NULL,
1088	/* pfnDetach */
1089	NULL,
1090	/* pfnPowerOff */
1091	NULL,
1092	/* pfnSoftReset */
1093	NULL,
1094	/* u32EndVersion */
1095	PDM_DRVREG_VERSION
1096	};

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source: vbox/trunk/src/VBox/Devices/PC/DrvACPI.cpp@ 100713

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