DrvACPI.cpp@ 29085

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1	/* $Id: DrvACPI.cpp 28800 2010-04-27 08:22:32Z vboxsync $ */
2	/** @file
3	* DrvACPI - ACPI Host Driver.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18	/*******************************************************************************
19	* Header Files *
20	*******************************************************************************/
21	#define LOG_GROUP LOG_GROUP_DRV_ACPI
22
23	#ifdef RT_OS_WINDOWS
24	# include <windows.h>
25	#endif
26
27	#include <VBox/pdmdrv.h>
28	#include <VBox/log.h>
29	#include <iprt/assert.h>
30	#include <iprt/string.h>
31	#include <iprt/uuid.h>
32
33	#ifdef RT_OS_LINUX
34	# include <iprt/critsect.h>
35	# include <iprt/dir.h>
36	# include <iprt/semaphore.h>
37	# include <iprt/stream.h>
38	#endif
39
40	#ifdef RT_OS_DARWIN
41	# include <Carbon/Carbon.h>
42	# include <IOKit/ps/IOPowerSources.h>
43	# include <IOKit/ps/IOPSKeys.h>
44	#endif
45
46	#ifdef RT_OS_FREEBSD
47	# include <sys/ioctl.h>
48	# include <dev/acpica/acpiio.h>
49	# include <sys/types.h>
50	# include <sys/sysctl.h>
51	# include <stdio.h>
52	# include <errno.h>
53	# include <fcntl.h>
54	# include <unistd.h>
55	#endif
56
57	#include "Builtins.h"
58
59
60	/*******************************************************************************
61	* Structures and Typedefs *
62	*******************************************************************************/
63	/**
64	* ACPI driver instance data.
65	*
66	* @implements PDMIACPICONNECTOR
67	*/
68	typedef struct DRVACPI
69	{
70	/** The ACPI interface. */
71	PDMIACPICONNECTOR IACPIConnector;
72	/** The ACPI port interface. */
73	PPDMIACPIPORT pPort;
74	/** Pointer to the driver instance. */
75	PPDMDRVINS pDrvIns;
76
77	#ifdef RT_OS_LINUX
78	/** The current power source. */
79	PDMACPIPOWERSOURCE enmPowerSource;
80	/** true = one or more batteries preset, false = no battery present. */
81	bool fBatteryPresent;
82	/** No need to RTThreadPoke the poller when set. */
83	bool volatile fDontPokePoller;
84	/** Remaining battery capacity. */
85	PDMACPIBATCAPACITY enmBatteryRemainingCapacity;
86	/** Battery state. */
87	PDMACPIBATSTATE enmBatteryState;
88	/** Preset battery charging/discharging rate. */
89	uint32_t u32BatteryPresentRate;
90	/** The poller thread. */
91	PPDMTHREAD pPollerThread;
92	/** Synchronize access to the above fields.
93	* XXX A spinlock is probaly cheaper ... */
94	RTCRITSECT CritSect;
95	/** Event semaphore the poller thread is sleeping on. */
96	RTSEMEVENT hPollerSleepEvent;
97	#endif
98
99	} DRVACPI, *PDRVACPI;
100
101
102	/**
103	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
104	*/
105	static DECLCALLBACK(void ) drvACPIQueryInterface(PPDMIBASE pInterface, const char pszIID)
106	{
107	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
108	PDRVACPI pThis = PDMINS_2_DATA(pDrvIns, PDRVACPI);
109
110	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
111	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIACPICONNECTOR, &pThis->IACPIConnector);
112	return NULL;
113	}
114
115	/**
116	* Get the current power source of the host system.
117	*
118	* @returns status code
119	* @param pInterface Pointer to the interface structure containing the called function pointer.
120	* @param pPowerSource Pointer to the power source result variable.
121	*/
122	static DECLCALLBACK(int) drvACPIQueryPowerSource(PPDMIACPICONNECTOR pInterface,
123	PDMACPIPOWERSOURCE *pPowerSource)
124	{
125	#if defined(RT_OS_WINDOWS)
126	SYSTEM_POWER_STATUS powerStatus;
127	if (GetSystemPowerStatus(&powerStatus))
128	{
129	/* running on battery? */
130	if ( powerStatus.ACLineStatus == 0 /* Offline */
131	\|\| powerStatus.ACLineStatus == 255 /* Unknown */
132	&& (powerStatus.BatteryFlag & 15) /* high \| low \| critical \| charging */
133	) /** @todo why is 'charging' included in the flag test? Add parenthesis around the right bits so the code is clearer. */
134	{
135	*pPowerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
136	}
137	/* running on AC link? */
138	else if (powerStatus.ACLineStatus == 1)
139	{
140	*pPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
141	}
142	else
143	/* what the hell we're running on? */
144	{
145	*pPowerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
146	}
147	}
148	else
149	{
150	AssertMsgFailed(("Could not determine system power status, error: 0x%x\n",
151	GetLastError()));
152	*pPowerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
153	}
154
155	#elif defined (RT_OS_LINUX)
156	PDRVACPI pThis = RT_FROM_MEMBER(pInterface, DRVACPI, IACPIConnector);
157	RTCritSectEnter(&pThis->CritSect);
158	*pPowerSource = pThis->enmPowerSource;
159	RTCritSectLeave(&pThis->CritSect);
160
161	#elif defined (RT_OS_DARWIN)
162	*pPowerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
163
164	CFTypeRef pBlob = IOPSCopyPowerSourcesInfo();
165	CFArrayRef pSources = IOPSCopyPowerSourcesList(pBlob);
166
167	CFDictionaryRef pSource = NULL;
168	const void *psValue;
169	bool fResult;
170
171	if (CFArrayGetCount(pSources) > 0)
172	{
173	for (int i = 0; i < CFArrayGetCount(pSources); ++i)
174	{
175	pSource = IOPSGetPowerSourceDescription(pBlob, CFArrayGetValueAtIndex(pSources, i));
176	/* If the source is empty skip over to the next one. */
177	if(!pSource)
178	continue;
179	/* Skip all power sources which are currently not present like a
180	* second battery. */
181	if (CFDictionaryGetValue(pSource, CFSTR(kIOPSIsPresentKey)) == kCFBooleanFalse)
182	continue;
183	/* Only internal power types are of interest. */
184	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSTransportTypeKey), &psValue);
185	if ( fResult
186	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSInternalType), 0) == kCFCompareEqualTo)
187	{
188	/* Check which power source we are connect on. */
189	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSPowerSourceStateKey), &psValue);
190	if ( fResult
191	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSACPowerValue), 0) == kCFCompareEqualTo)
192	*pPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
193	else if ( fResult
194	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSBatteryPowerValue), 0) == kCFCompareEqualTo)
195	*pPowerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
196	}
197	}
198	}
199	CFRelease(pBlob);
200	CFRelease(pSources);
201
202	#elif defined(RT_OS_FREEBSD)
203	int fAcLine = 0;
204	size_t cbParameter = sizeof(fAcLine);
205
206	int rc = sysctlbyname("hw.acpi.acline", &fAcLine, &cbParameter, NULL, NULL);
207
208	if (!rc)
209	{
210	if (fAcLine == 1)
211	*pPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
212	else if (fAcLine == 0)
213	*pPowerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
214	else
215	*pPowerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
216	}
217	else
218	{
219	AssertMsg(errno == ENOENT, ("rc=%d (%s)\n", rc, strerror(errno)));
220	*pPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
221	}
222	#else /* !RT_OS_FREEBSD either - what could this be? */
223	*pPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
224
225	#endif /* !RT_OS_FREEBSD */
226	return VINF_SUCCESS;
227	}
228
229	/**
230	* @copydoc PDMIACPICONNECTOR::pfnQueryBatteryStatus
231	*/
232	static DECLCALLBACK(int) drvACPIQueryBatteryStatus(PPDMIACPICONNECTOR pInterface, bool *pfPresent,
233	PPDMACPIBATCAPACITY penmRemainingCapacity,
234	PPDMACPIBATSTATE penmBatteryState,
235	uint32_t *pu32PresentRate)
236	{
237	/* default return values for all architectures */
238	pfPresent = false; / no battery present */
239	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGED;
240	*penmRemainingCapacity = PDM_ACPI_BAT_CAPACITY_UNKNOWN;
241	pu32PresentRate = ~0; / present rate is unknown */
242
243	#if defined(RT_OS_WINDOWS)
244	SYSTEM_POWER_STATUS powerStatus;
245	if (GetSystemPowerStatus(&powerStatus))
246	{
247	/* 128 means no battery present */
248	*pfPresent = !(powerStatus.BatteryFlag & 128);
249	/* just forward the value directly */
250	*penmRemainingCapacity = (PDMACPIBATCAPACITY)powerStatus.BatteryLifePercent;
251	/* we assume that we are discharging the battery if we are not on-line and
252	* not charge the battery */
253	uint32_t uBs = PDM_ACPI_BAT_STATE_CHARGED;
254	if (powerStatus.BatteryFlag & 8)
255	uBs = PDM_ACPI_BAT_STATE_CHARGING;
256	else if (powerStatus.ACLineStatus == 0 \|\| powerStatus.ACLineStatus == 255)
257	uBs = PDM_ACPI_BAT_STATE_DISCHARGING;
258	if (powerStatus.BatteryFlag & 4)
259	uBs \|= PDM_ACPI_BAT_STATE_CRITICAL;
260	*penmBatteryState = (PDMACPIBATSTATE)uBs;
261	/* on Windows it is difficult to request the present charging/discharging rate */
262	}
263	else
264	{
265	AssertMsgFailed(("Could not determine system power status, error: 0x%x\n",
266	GetLastError()));
267	}
268
269	#elif defined(RT_OS_LINUX)
270	PDRVACPI pThis = RT_FROM_MEMBER(pInterface, DRVACPI, IACPIConnector);
271	RTCritSectEnter(&pThis->CritSect);
272	*pfPresent = pThis->fBatteryPresent;
273	*penmRemainingCapacity = pThis->enmBatteryRemainingCapacity;
274	*penmBatteryState = pThis->enmBatteryState;
275	*pu32PresentRate = pThis->u32BatteryPresentRate;
276	RTCritSectLeave(&pThis->CritSect);
277
278	#elif defined(RT_OS_DARWIN)
279	CFTypeRef pBlob = IOPSCopyPowerSourcesInfo();
280	CFArrayRef pSources = IOPSCopyPowerSourcesList(pBlob);
281
282	CFDictionaryRef pSource = NULL;
283	const void *psValue;
284	bool fResult;
285
286	if (CFArrayGetCount(pSources) > 0)
287	{
288	for (int i = 0; i < CFArrayGetCount(pSources); ++i)
289	{
290	pSource = IOPSGetPowerSourceDescription(pBlob, CFArrayGetValueAtIndex(pSources, i));
291	/* If the source is empty skip over to the next one. */
292	if(!pSource)
293	continue;
294	/* Skip all power sources which are currently not present like a
295	* second battery. */
296	if (CFDictionaryGetValue(pSource, CFSTR(kIOPSIsPresentKey)) == kCFBooleanFalse)
297	continue;
298	/* Only internal power types are of interest. */
299	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSTransportTypeKey), &psValue);
300	if ( fResult
301	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSInternalType), 0) == kCFCompareEqualTo)
302	{
303	PDMACPIPOWERSOURCE powerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
304	/* First check which power source we are connect on. */
305	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSPowerSourceStateKey), &psValue);
306	if ( fResult
307	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSACPowerValue), 0) == kCFCompareEqualTo)
308	powerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
309	else if ( fResult
310	&& CFStringCompare((CFStringRef)psValue, CFSTR(kIOPSBatteryPowerValue), 0) == kCFCompareEqualTo)
311	powerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
312
313	/* At this point the power source is present. */
314	*pfPresent = true;
315	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGED;
316
317	int curCapacity = 0;
318	int maxCapacity = 1;
319	float remCapacity = 0.0f;
320
321	/* Fetch the current capacity value of the power source */
322	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSCurrentCapacityKey), &psValue);
323	if (fResult)
324	CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &curCapacity);
325	/* Fetch the maximum capacity value of the power source */
326	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSMaxCapacityKey), &psValue);
327	if (fResult)
328	CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &maxCapacity);
329
330	/* Calculate the remaining capacity in percent */
331	remCapacity = ((float)curCapacity/(float)maxCapacity * PDM_ACPI_BAT_CAPACITY_MAX);
332	*penmRemainingCapacity = (PDMACPIBATCAPACITY)remCapacity;
333
334	if (powerSource == PDM_ACPI_POWER_SOURCE_BATTERY)
335	{
336	/* If we are on battery power we are discharging in every
337	* case */
338	*penmBatteryState = PDM_ACPI_BAT_STATE_DISCHARGING;
339	int timeToEmpty = -1;
340	/* Get the time till the battery source will be empty */
341	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSTimeToEmptyKey), &psValue);
342	if (fResult)
343	CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &timeToEmpty);
344	if (timeToEmpty != -1)
345	/* 0...1000 */
346	pu32PresentRate = (uint32_t)roundf((remCapacity / ((float)timeToEmpty/60.0)) 10.0);
347	}
348
349	if ( powerSource == PDM_ACPI_POWER_SOURCE_OUTLET
350	&& CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSIsChargingKey), &psValue))
351	{
352	/* We are running on an AC power source, but we also have a
353	* battery power source present. */
354	if (CFBooleanGetValue((CFBooleanRef)psValue) > 0)
355	{
356	/* This means charging. */
357	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGING;
358	int timeToFull = -1;
359	/* Get the time till the battery source will be charged */
360	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSTimeToFullChargeKey), &psValue);
361	if (fResult)
362	CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &timeToFull);
363	if (timeToFull != -1)
364	/* 0...1000 */
365	pu32PresentRate = (uint32_t)roundf((100.0-(float)remCapacity) / ((float)timeToFull/60.0)) 10.0;
366	}
367	}
368
369	/* Check for critical */
370	int criticalValue = 20;
371	fResult = CFDictionaryGetValueIfPresent(pSource, CFSTR(kIOPSDeadWarnLevelKey), &psValue);
372	if (fResult)
373	CFNumberGetValue((CFNumberRef)psValue, kCFNumberSInt32Type, &criticalValue);
374	if (remCapacity < criticalValue)
375	penmBatteryState = (PDMACPIBATSTATE)(penmBatteryState \| PDM_ACPI_BAT_STATE_CRITICAL);
376	}
377	}
378	}
379	CFRelease(pBlob);
380	CFRelease(pSources);
381
382	#elif defined(RT_OS_FREEBSD)
383	/* We try to use /dev/acpi first and if that fails use the sysctls. */
384	bool fSuccess = true;
385	int FileAcpi = 0;
386	int rc = 0;
387
388	FileAcpi = open("/dev/acpi", O_RDONLY);
389	if (FileAcpi != -1)
390	{
391	bool fMilliWatt;
392	union acpi_battery_ioctl_arg BatteryIo;
393
394	memset(&BatteryIo, 0, sizeof(BatteryIo));
395	BatteryIo.unit = 0; /* Always use the first battery. */
396
397	/* Determine the power units first. */
398	if (ioctl(FileAcpi, ACPIIO_BATT_GET_BIF, &BatteryIo) == -1)
399	fSuccess = false;
400	else
401	{
402	if (BatteryIo.bif.units == ACPI_BIF_UNITS_MW)
403	fMilliWatt = true;
404	else
405	fMilliWatt = false; /* mA */
406
407	BatteryIo.unit = 0;
408	if (ioctl(FileAcpi, ACPIIO_BATT_GET_BATTINFO, &BatteryIo) == -1)
409	fSuccess = false;
410	else
411	{
412	if ((BatteryIo.battinfo.state & ACPI_BATT_STAT_NOT_PRESENT) == ACPI_BATT_STAT_NOT_PRESENT)
413	*pfPresent = false;
414	else
415	{
416	*pfPresent = true;
417
418	if (BatteryIo.battinfo.state & ACPI_BATT_STAT_DISCHARG)
419	*penmBatteryState = PDM_ACPI_BAT_STATE_DISCHARGING;
420	else if (BatteryIo.battinfo.state & ACPI_BATT_STAT_CHARGING)
421	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGING;
422	else
423	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGED;
424
425	if (BatteryIo.battinfo.state & ACPI_BATT_STAT_CRITICAL)
426	penmBatteryState = (PDMACPIBATSTATE)(penmBatteryState \| PDM_ACPI_BAT_STATE_CRITICAL);
427	}
428
429	if (BatteryIo.battinfo.cap != -1)
430	*penmRemainingCapacity = (PDMACPIBATCAPACITY)BatteryIo.battinfo.cap;
431
432	BatteryIo.unit = 0;
433	if (ioctl(FileAcpi, ACPIIO_BATT_GET_BST, &BatteryIo) == 0)
434	{
435	/* The rate can be either mW or mA but the ACPI device wants mW. */
436	if (BatteryIo.bst.rate != 0xffffffff)
437	{
438	if (fMilliWatt)
439	*pu32PresentRate = BatteryIo.bst.rate;
440	else if (BatteryIo.bst.volt != 0xffffffff)
441	{
442	/*
443	* The rate is in mA so we have to convert it.
444	* The current power rate can be calculated with P = U * I
445	*/
446	*pu32PresentRate = (uint32_t)( ( ((float)BatteryIo.bst.volt/1000.0)
447	* ((float)BatteryIo.bst.rate/1000.0))
448	* 1000.0);
449	}
450	}
451	}
452	}
453	}
454
455	close(FileAcpi);
456	}
457	else
458	fSuccess = false;
459
460	if (!fSuccess)
461	{
462	int fBatteryState = 0;
463	size_t cbParameter = sizeof(fBatteryState);
464
465	rc = sysctlbyname("hw.acpi.battery.state", &fBatteryState, &cbParameter, NULL, NULL);
466	if (!rc)
467	{
468	if ((fBatteryState & ACPI_BATT_STAT_NOT_PRESENT) == ACPI_BATT_STAT_NOT_PRESENT)
469	*pfPresent = false;
470	else
471	{
472	*pfPresent = true;
473
474	if (fBatteryState & ACPI_BATT_STAT_DISCHARG)
475	*penmBatteryState = PDM_ACPI_BAT_STATE_DISCHARGING;
476	else if (fBatteryState & ACPI_BATT_STAT_CHARGING)
477	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGING;
478	else
479	*penmBatteryState = PDM_ACPI_BAT_STATE_CHARGED;
480
481	if (fBatteryState & ACPI_BATT_STAT_CRITICAL)
482	penmBatteryState = (PDMACPIBATSTATE)(penmBatteryState \| PDM_ACPI_BAT_STATE_CRITICAL);
483
484	/* Get battery level. */
485	int curCapacity = 0;
486	cbParameter = sizeof(curCapacity);
487	rc = sysctlbyname("hw.acpi.battery.life", &curCapacity, &cbParameter, NULL, NULL);
488	if (!rc && curCapacity >= 0)
489	*penmRemainingCapacity = (PDMACPIBATCAPACITY)curCapacity;
490
491	/* The rate can't be determined with sysctls. */
492	}
493	}
494	}
495
496	#endif /* RT_OS_FREEBSD */
497
498	return VINF_SUCCESS;
499	}
500
501	#ifdef RT_OS_LINUX
502	/**
503	* Poller thread for /proc/acpi status files.
504	*
505	* Reading these files takes ages (several seconds) on some hosts, therefore
506	* start this thread. The termination of this thread may take some seconds
507	* on such a hosts!
508	*
509	* @param pDrvIns The driver instance data.
510	* @param pThread The thread.
511	*/
512	static DECLCALLBACK(int) drvACPIPoller(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
513	{
514	PDRVACPI pThis = PDMINS_2_DATA(pDrvIns, PDRVACPI);
515
516	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
517	return VINF_SUCCESS;
518
519	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
520	{
521	ASMAtomicWriteBool(&pThis->fDontPokePoller, false);
522
523	PDMACPIPOWERSOURCE enmPowerSource = PDM_ACPI_POWER_SOURCE_UNKNOWN;
524	PRTSTREAM pStrmStatus;
525	PRTSTREAM pStrmType;
526	PRTDIR pDir = NULL;
527	RTDIRENTRY DirEntry;
528	char szLine[1024];
529	bool fBatteryPresent = false; /* one or more batteries present */
530	bool fCharging = false; /* one or more batteries charging */
531	bool fDischarging = false; /* one or more batteries discharging */
532	bool fCritical = false; /* one or more batteries in critical state */
533	int32_t maxCapacityTotal = 0; /* total capacity of all batteries */
534	int32_t currentCapacityTotal = 0; /* total current capacity of all batteries */
535	int32_t presentRateTotal = 0; /* total present (dis)charging rate of all batts */
536
537	int rc = RTDirOpen(&pDir, "/sys/class/power_supply/");
538	if (RT_SUCCESS(rc))
539	{
540	/*
541	* The new /sys interface introduced with Linux 2.6.25.
542	*/
543	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
544	{
545	rc = RTDirRead(pDir, &DirEntry, NULL);
546	if (RT_FAILURE(rc))
547	break;
548	if ( strcmp(DirEntry.szName, ".") == 0
549	\|\| strcmp(DirEntry.szName, "..") == 0)
550	continue;
551	#define POWER_OPEN(s, n) RTStrmOpenF("r", s, "/sys/class/power_supply/%s/" n, DirEntry.szName)
552	rc = POWER_OPEN(&pStrmType, "type");
553	if (RT_FAILURE(rc))
554	continue;
555	rc = RTStrmGetLine(pStrmType, szLine, sizeof(szLine));
556	if (RT_SUCCESS(rc))
557	{
558	if (strcmp(szLine, "Mains") == 0)
559	{
560	/* AC adapter */
561	rc = POWER_OPEN(&pStrmStatus, "online");
562	if (RT_SUCCESS(rc))
563	{
564	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
565	if ( RT_SUCCESS(rc)
566	&& strcmp(szLine, "1") == 0)
567	enmPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
568	else
569	enmPowerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
570	RTStrmClose(pStrmStatus);
571	}
572	}
573	else if (strcmp(szLine, "Battery") == 0)
574	{
575	/* Battery */
576	rc = POWER_OPEN(&pStrmStatus, "present");
577	if (RT_SUCCESS(rc))
578	{
579	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
580	RTStrmClose(pStrmStatus);
581	if ( RT_SUCCESS(rc)
582	&& strcmp(szLine, "1") == 0)
583	{
584	fBatteryPresent = true;
585	rc = RTStrmOpenF("r", &pStrmStatus,
586	"/sys/class/power_supply/%s/status", DirEntry.szName);
587	if (RT_SUCCESS(rc))
588	{
589	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
590	if (RT_SUCCESS(rc))
591	{
592	if (strcmp(szLine, "Discharging") == 0)
593	fDischarging = true;
594	else if (strcmp(szLine, "Charging") == 0)
595	fCharging = true;
596	}
597	RTStrmClose(pStrmStatus);
598	}
599	rc = POWER_OPEN(&pStrmStatus, "capacity_level");
600	if (RT_SUCCESS(rc))
601	{
602	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
603	if ( RT_SUCCESS(rc)
604	&& strcmp(szLine, "Critical") == 0)
605	fCritical = true;
606	RTStrmClose(pStrmStatus);
607	}
608	rc = POWER_OPEN(&pStrmStatus, "energy_full");
609	if (RT_FAILURE(rc))
610	rc = POWER_OPEN(&pStrmStatus, "charge_full");
611	if (RT_SUCCESS(rc))
612	{
613	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
614	if (RT_SUCCESS(rc))
615	{
616	int32_t maxCapacity = 0;
617	rc = RTStrToInt32Full(szLine, 0, &maxCapacity);
618	if ( RT_SUCCESS(rc)
619	&& maxCapacity > 0)
620	maxCapacityTotal += maxCapacity;
621	}
622	RTStrmClose(pStrmStatus);
623	}
624	rc = POWER_OPEN(&pStrmStatus, "energy_now");
625	if (RT_FAILURE(rc))
626	rc = POWER_OPEN(&pStrmStatus, "charge_now");
627	if (RT_SUCCESS(rc))
628	{
629	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
630	if (RT_SUCCESS(rc))
631	{
632	int32_t currentCapacity = 0;
633	rc = RTStrToInt32Full(szLine, 0, &currentCapacity);
634	if ( RT_SUCCESS(rc)
635	&& currentCapacity > 0)
636	currentCapacityTotal += currentCapacity;
637	}
638	RTStrmClose(pStrmStatus);
639	}
640	rc = POWER_OPEN(&pStrmStatus, "current_now");
641	if (RT_SUCCESS(rc))
642	{
643	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
644	if (RT_SUCCESS(rc))
645	{
646	int32_t presentRate = 0;
647	rc = RTStrToInt32Full(szLine, 0, &presentRate);
648	if ( RT_SUCCESS(rc)
649	&& presentRate > 0)
650	{
651	if (fDischarging)
652	presentRateTotal -= presentRate;
653	else
654	presentRateTotal += presentRate;
655	}
656	}
657	RTStrmClose(pStrmStatus);
658	}
659	}
660	}
661	}
662	}
663	RTStrmClose(pStrmType);
664	#undef POWER_OPEN
665	}
666	RTDirClose(pDir);
667	}
668	else /* !/sys */
669	{
670	/*
671	* The old /proc/acpi interface
672	*/
673	/*
674	* Read the status of the powerline-adapter.
675	*/
676	rc = RTDirOpen(&pDir, "/proc/acpi/ac_adapter/");
677	if (RT_SUCCESS(rc))
678	{
679	#define POWER_OPEN(s, n) RTStrmOpenF("r", s, "/proc/acpi/ac_adapter/%s/" n, DirEntry.szName)
680	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
681	{
682	rc = RTDirRead(pDir, &DirEntry, NULL);
683	if (RT_FAILURE(rc))
684	break;
685	if ( strcmp(DirEntry.szName, ".") == 0
686	\|\| strcmp(DirEntry.szName, "..") == 0)
687	continue;
688	rc = POWER_OPEN(&pStrmStatus, "status");
689	if (RT_FAILURE(rc))
690	rc = POWER_OPEN(&pStrmStatus, "state");
691	if (RT_SUCCESS(rc))
692	{
693	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
694	{
695	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
696	if (RT_FAILURE(rc))
697	break;
698	if ( strstr(szLine, "Status:") != NULL
699	\|\| strstr(szLine, "state:") != NULL)
700	{
701	if (strstr(szLine, "on-line") != NULL)
702	enmPowerSource = PDM_ACPI_POWER_SOURCE_OUTLET;
703	else
704	enmPowerSource = PDM_ACPI_POWER_SOURCE_BATTERY;
705	break;
706	}
707	}
708	RTStrmClose(pStrmStatus);
709	break;
710	}
711	}
712	RTDirClose(pDir);
713	#undef POWER_OPEN
714	}
715
716	/*
717	* Read the status of all batteries and collect it into one.
718	*/
719	rc = RTDirOpen(&pDir, "/proc/acpi/battery/");
720	if (RT_SUCCESS(rc))
721	{
722	#define POWER_OPEN(s, n) RTStrmOpenF("r", s, "/proc/acpi/battery/%s/" n, DirEntry.szName)
723	bool fThisBatteryPresent = false;
724	bool fThisDischarging = false;
725
726	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
727	{
728	rc = RTDirRead(pDir, &DirEntry, NULL);
729	if (RT_FAILURE(rc))
730	break;
731	if ( strcmp(DirEntry.szName, ".") == 0
732	\|\| strcmp(DirEntry.szName, "..") == 0)
733	continue;
734
735	rc = POWER_OPEN(&pStrmStatus, "status");
736	/* there is a 2nd variant of that file */
737	if (RT_FAILURE(rc))
738	rc = POWER_OPEN(&pStrmStatus, "state");
739	if (RT_FAILURE(rc))
740	continue;
741
742	PRTSTREAM pStrmInfo;
743	rc = POWER_OPEN(&pStrmInfo, "info");
744	if (RT_FAILURE(rc))
745	{
746	RTStrmClose(pStrmStatus);
747	continue;
748	}
749
750	/* get 'present' status from the info file */
751	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
752	{
753	rc = RTStrmGetLine(pStrmInfo, szLine, sizeof(szLine));
754	if (RT_FAILURE(rc))
755	break;
756	if (strstr(szLine, "present:") != NULL)
757	{
758	if (strstr(szLine, "yes") != NULL)
759	{
760	fThisBatteryPresent = true;
761	break;
762	}
763	}
764	}
765
766	if (fThisBatteryPresent)
767	{
768	fBatteryPresent = true;
769	RTStrmRewind(pStrmInfo);
770
771	/* get the maximum capacity from the info file */
772	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
773	{
774	rc = RTStrmGetLine(pStrmInfo, szLine, sizeof(szLine));
775	if (RT_FAILURE(rc))
776	break;
777	if (strstr(szLine, "last full capacity:") != NULL)
778	{
779	char *psz;
780	int32_t maxCapacity = 0;
781	rc = RTStrToInt32Ex(RTStrStripL(&szLine[19]), &psz, 0, &maxCapacity);
782	if (RT_FAILURE(rc))
783	maxCapacity = 0;
784	maxCapacityTotal += maxCapacity;
785	break;
786	}
787	}
788
789	/* get the current capacity/state from the status file */
790	int32_t presentRate = 0;
791	bool fGotRemainingCapacity = false;
792	bool fGotBatteryState = false;
793	bool fGotCapacityState = false;
794	bool fGotPresentRate = false;
795	while ( ( !fGotRemainingCapacity
796	\|\| !fGotBatteryState
797	\|\| !fGotCapacityState
798	\|\| !fGotPresentRate)
799	&& pThread->enmState == PDMTHREADSTATE_RUNNING)
800	{
801	rc = RTStrmGetLine(pStrmStatus, szLine, sizeof(szLine));
802	if (RT_FAILURE(rc))
803	break;
804	if (strstr(szLine, "remaining capacity:") != NULL)
805	{
806	char *psz;
807	int32_t currentCapacity = 0;
808	rc = RTStrToInt32Ex(RTStrStripL(&szLine[19]), &psz, 0, &currentCapacity);
809	if ( RT_SUCCESS(rc)
810	&& currentCapacity > 0)
811	currentCapacityTotal += currentCapacity;
812	fGotRemainingCapacity = true;
813	}
814	else if (strstr(szLine, "charging state:") != NULL)
815	{
816	if (strstr(szLine + 15, "discharging") != NULL)
817	{
818	fDischarging = true;
819	fThisDischarging = true;
820	}
821	else if (strstr(szLine + 15, "charging") != NULL)
822	fCharging = true;
823	fGotBatteryState = true;
824	}
825	else if (strstr(szLine, "capacity state:") != NULL)
826	{
827	if (strstr(szLine + 15, "critical") != NULL)
828	fCritical = true;
829	fGotCapacityState = true;
830	}
831	if (strstr(szLine, "present rate:") != NULL)
832	{
833	char *psz;
834	rc = RTStrToInt32Ex(RTStrStripL(&szLine[13]), &psz, 0, &presentRate);
835	if (RT_FAILURE(rc))
836	presentRate = 0;
837	fGotPresentRate = true;
838	}
839	}
840	if (fThisDischarging)
841	presentRateTotal -= presentRate;
842	else
843	presentRateTotal += presentRate;
844	}
845	RTStrmClose(pStrmStatus);
846	RTStrmClose(pStrmInfo);
847	}
848	RTDirClose(pDir);
849	#undef POWER_OPEN
850	}
851	} /* /proc/acpi */
852
853	/* atomic update of the state */
854	RTCritSectEnter(&pThis->CritSect);
855	pThis->enmPowerSource = enmPowerSource;
856	pThis->fBatteryPresent = fBatteryPresent;
857
858	/* charging/discharging bits are mutual exclusive */
859	uint32_t uBs = PDM_ACPI_BAT_STATE_CHARGED;
860	if (fDischarging)
861	uBs = PDM_ACPI_BAT_STATE_DISCHARGING;
862	else if (fCharging)
863	uBs = PDM_ACPI_BAT_STATE_CHARGING;
864	if (fCritical)
865	uBs \|= PDM_ACPI_BAT_STATE_CRITICAL;
866	pThis->enmBatteryState = (PDMACPIBATSTATE)uBs;
867
868	if (maxCapacityTotal > 0 && currentCapacityTotal > 0)
869	{
870	if (presentRateTotal < 0)
871	presentRateTotal = -presentRateTotal;
872
873	/* calculate the percentage */
874	pThis->enmBatteryRemainingCapacity =
875	(PDMACPIBATCAPACITY)( ( (float)currentCapacityTotal
876	/ (float)maxCapacityTotal)
877	* PDM_ACPI_BAT_CAPACITY_MAX);
878	pThis->u32BatteryPresentRate =
879	(uint32_t)(( (float)presentRateTotal
880	/ (float)maxCapacityTotal) * 1000);
881	}
882	else
883	{
884	/* unknown capacity / state */
885	pThis->enmBatteryRemainingCapacity = PDM_ACPI_BAT_CAPACITY_UNKNOWN;
886	pThis->u32BatteryPresentRate = ~0;
887	}
888	RTCritSectLeave(&pThis->CritSect);
889
890	/* wait a bit (e.g. Ubuntu/GNOME polls every 30 seconds) */
891	ASMAtomicWriteBool(&pThis->fDontPokePoller, true);
892	rc = RTSemEventWait(pThis->hPollerSleepEvent, 20000);
893	}
894
895	return VINF_SUCCESS;
896	}
897
898	static DECLCALLBACK(int) drvACPIPollerWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
899	{
900	PDRVACPI pThis = PDMINS_2_DATA(pDrvIns, PDRVACPI);
901
902	RTSemEventSignal(pThis->hPollerSleepEvent);
903	if (!ASMAtomicReadBool(&pThis->fDontPokePoller))
904	RTThreadPoke(pThread->Thread);
905	return VINF_SUCCESS;
906	}
907	#endif /* RT_OS_LINUX */
908
909
910	/**
911	* Destruct a driver instance.
912	*
913	* Most VM resources are freed by the VM. This callback is provided so that any non-VM
914	* resources can be freed correctly.
915	*
916	* @param pDrvIns The driver instance data.
917	*/
918	static DECLCALLBACK(void) drvACPIDestruct(PPDMDRVINS pDrvIns)
919	{
920	PDRVACPI pThis = PDMINS_2_DATA(pDrvIns, PDRVACPI);
921
922	LogFlow(("drvACPIDestruct\n"));
923	PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
924
925	#ifdef RT_OS_LINUX
926	RTSemEventDestroy(pThis->hPollerSleepEvent);
927	pThis->hPollerSleepEvent = NIL_RTSEMEVENT;
928	RTCritSectDelete(&pThis->CritSect);
929	#endif
930	}
931
932	/**
933	* Construct an ACPI driver instance.
934	*
935	* @copydoc FNPDMDRVCONSTRUCT
936	*/
937	static DECLCALLBACK(int) drvACPIConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
938	{
939	PDRVACPI pThis = PDMINS_2_DATA(pDrvIns, PDRVACPI);
940	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
941	int rc = VINF_SUCCESS;
942
943	/*
944	* Init the static parts.
945	*/
946	pThis->pDrvIns = pDrvIns;
947	/* IBase */
948	pDrvIns->IBase.pfnQueryInterface = drvACPIQueryInterface;
949	/* IACPIConnector */
950	pThis->IACPIConnector.pfnQueryPowerSource = drvACPIQueryPowerSource;
951	pThis->IACPIConnector.pfnQueryBatteryStatus = drvACPIQueryBatteryStatus;
952
953	/*
954	* Validate the config.
955	*/
956	if (!CFGMR3AreValuesValid(pCfg, "\0"))
957	return VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES;
958
959	/*
960	* Check that no-one is attached to us.
961	*/
962	AssertMsgReturn(PDMDrvHlpNoAttach(pDrvIns) == VERR_PDM_NO_ATTACHED_DRIVER,
963	("Configuration error: Not possible to attach anything to this driver!\n"),
964	VERR_PDM_DRVINS_NO_ATTACH);
965
966	/*
967	* Query the ACPI port interface.
968	*/
969	pThis->pPort = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMIACPIPORT);
970	if (!pThis->pPort)
971	{
972	AssertMsgFailed(("Configuration error: the above device/driver didn't export the ACPI port interface!\n"));
973	return VERR_PDM_MISSING_INTERFACE_ABOVE;
974	}
975
976	#ifdef RT_OS_LINUX
977	/*
978	* Start the poller thread.
979	*/
980	rc = PDMDrvHlpThreadCreate(pDrvIns, &pThis->pPollerThread, pThis, drvACPIPoller,
981	drvACPIPollerWakeup, 0, RTTHREADTYPE_INFREQUENT_POLLER, "ACPI Poller");
982	if (RT_FAILURE(rc))
983	return rc;
984
985	rc = RTCritSectInit(&pThis->CritSect);
986	if (RT_FAILURE(rc))
987	return rc;
988
989	rc = RTSemEventCreate(&pThis->hPollerSleepEvent);
990	#endif
991
992	return rc;
993	}
994
995
996	/**
997	* ACPI driver registration record.
998	*/
999	const PDMDRVREG g_DrvACPI =
1000	{
1001	/* u32Version */
1002	PDM_DRVREG_VERSION,
1003	/* szName */
1004	"ACPIHost",
1005	/* szRCMod */
1006	"",
1007	/* szR0Mod */
1008	"",
1009	/* pszDescription */
1010	"ACPI Host Driver",
1011	/* fFlags */
1012	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
1013	/* fClass. */
1014	PDM_DRVREG_CLASS_ACPI,
1015	/* cMaxInstances */
1016	~0,
1017	/* cbInstance */
1018	sizeof(DRVACPI),
1019	/* pfnConstruct */
1020	drvACPIConstruct,
1021	/* pfnDestruct */
1022	drvACPIDestruct,
1023	/* pfnRelocate */
1024	NULL,
1025	/* pfnIOCtl */
1026	NULL,
1027	/* pfnPowerOn */
1028	NULL,
1029	/* pfnReset */
1030	NULL,
1031	/* pfnSuspend */
1032	NULL,
1033	/* pfnResume */
1034	NULL,
1035	/* pfnAttach */
1036	NULL,
1037	/* pfnDetach */
1038	NULL,
1039	/* pfnPowerOff */
1040	NULL,
1041	/* pfnSoftReset */
1042	NULL,
1043	/* u32EndVersion */
1044	PDM_DRVREG_VERSION
1045	};

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source: vbox/trunk/src/VBox/Devices/PC/DrvACPI.cpp@ 29085

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