S3/S4/S5 Long Run Test

peterhu · 发表于 2009-6-3 14:24:19

S3/S4/S5 Long Run Test

1. Why need it？

NB研发的工程中，需要跑很多的测试项目，其中long run S3/S4/S5就是非常重要的测试项目。而且对于测试结果非常看重，一般long run测试fail就没法出货。常规的测试方法就是10～20台机器测试S3/S4/S5 1000 cycle，如果fail率在万分之几就有可能要挂了。于是我就有了写一个long run S3/S4/S5测试程序的想法了。

2. How to implement?

心动不如行动，Let’s go！经过几番查阅MSDN，S3/S4的功能已经有些眉目了，可是如何实现S5 wakeup呢？猛翻SDK&DDK，狂试API结果发现不行，好像没有相关的API能做到这件事。最后联系微软的FAE，他们的结论也是如此。既然常规做法不行，那么我就另辟蹊径。我知道BIOS Setup menu 有个选项可以设置RTC唤醒，只要机器还有电S5的状态下也可以唤醒机器。那么BIOS是怎么做的呢？我请教了BIOS 得知需要做两个动作：1.设置CMOS中的alarm time 2：将chipset RTC_EN bit置起然后进入S5。系统在alarm time到达时会产生wakeup event，Chipset会送power sequence系统就会开机。通过一个IO port driver，完成上述过程后我调用API ExitWindowsEx(EWX_SHUTDOWN|EWX_FORCE,0);关机，我等的头发都白了系统也没有唤醒L，到底什么地方出了问题呀？后来我用SE.exe模拟上述过程，结果发现RTC_EN被我修改过之后，过了一会居然又被改回原来的值了，看起来windows在幕后做了不少小动作哦J，这样一来这个方法就行不通了，那么该怎么办呢？答案就是使用EC_BIOS去做，只要有电EC就会运行，那么S5时EC仍然在工作，所以只需要EC在特定的条件下模拟一个开机动作即可。思路已经有了那么该如何实现呢?方法有两种：a.通过IO port driver 下81 cmd给66 port，然后将EC ram index和value送给62 port，这样就可以修改EC ram了，然后EC在S5时检查该EC ram值如果非0就倒数计时，时间到了就模拟一个开机动作，从而完成S5 wake up。b.同样是写EC ram不过使用不同的方法，我们可以在BIOS asl code里定制一个WMI ACPI device，并且在该device scope提供query/set EC ram的方法，并且提供一个WMI ACPI的driver，这样应用程序就可以方便的操纵EC ram了，而且一旦完成这只driver就可以完成非常多的增值部分，比如我们可以写一个程序读写EC ram中的battery info；或者我们可以写一个读取thermal info程序等等。
如下图1是程序的运行画面，该测试程序实现了S3/S4/S5的功能S3/S4在xp下面可以正常工作，而

vista下无法唤醒L。下S3/S4是通下述代码实现的：

图 1

//hibernate and standby

int
CAutoPowerOnShutdownDlg::SetPower(BOOL
bSuspend,BOOL
bForce)

{

TOKEN_PRIVILEGES
tp;

HANDLE
hToken;

LUID
luid;

LPTSTR
MachineName=NULL;

                     if(!OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES,&hToken
))

{

                                 return
RTN_ERROR;

}

                     if(!LookupPrivilegeValue(MachineName,
SE_SHUTDOWN_NAME,
&luid))

{

                                 return
RTN_ERROR;

}

tp.PrivilegeCount
=
1;

tp.Privileges[0].Luid
=
luid;

tp.Privileges[0].Attributes
=
SE_PRIVILEGE_ENABLED;

AdjustTokenPrivileges(hToken,
FALSE,
&tp,
sizeof(TOKEN_PRIVILEGES),NULL,

NULL
);

SetSystemPowerState(bSuspend,bForce);

                     return
0;

}

S3/S4 wake up function是通过在下去的时候设置一个WaitableTimer实
现唤醒的功能代码如下所示：

case
PBT_APMSUSPEND:

{

HANDLE hTimer=::CreateWaitableTimer(NULL,TRUE,CString(_T("WaitForResume")));

            if(!hTimer)

{

MessageBox(CString(_T("Fail
to
create
waitable
timer!")));

}

hTimer=OpenWaitableTimer(TIMER_ALL_ACCESS,TRUE,CString(_T("WaitForResume")));

LARGE_INTEGER
liDueTime;

liDueTime.QuadPart=m_DlInf.m_TimeSnd *1000*1000*(-10);

            if(!::SetWaitableTimer(hTimer,&liDueTime,0,NULL,NULL,TRUE))

{

MessageBox(CString(_T("Fail
to
set
waitable
timer!")));

                     break;

}

}
break;

最关键的部分就是S5 wake up了我们来看看它的实现代码吧，代码中最核
心的部分就是同连接到我们定制的WMI class MSI_System,然后通过
HRESULT PutInstance(
[in]
IWbemClassObject* pInst,
[in]
LONG lFlags,
[in]
IWbemContext* pCtx,
[out]
IWbemCallResult** ppCallResult);修改该class的System变量而该变量在BIOS的asl中被定义在EC ram之
中的特定位置，这样就会改变EC ram中的值了。

void CAutoPowerOnShutdownDlg::SetS4WakeTimer(unsigned char seconds)

{

HRESULT hres;

// Step 1: --------------------------------------------------

// Initialize COM. ------------------------------------------

hres =
CoInitializeEx(0, COINIT_MULTITHREADED);

if (FAILED(hres))

{

cout << "Failed to initialize COM library. Error code = 0x"

<< hex << hres << endl;
                                 return;

}

// Step 2: --------------------------------------------------

// Set general COM security levels --------------------------

// Note: If you are using Windows 2000, you need to specify -

// the default authentication credentials for a user by using

// a SOLE_AUTHENTICATION_LIST structure in the pAuthList ----

// parameter of CoInitializeSecurity ------------------------

hres =
CoInitializeSecurity(

NULL,

-1,

// COM authentication

NULL,
// Authentication services

NULL,
// Reserved

RPC_C_AUTHN_LEVEL_DEFAULT,
// Default authentication

RPC_C_IMP_LEVEL_IMPERSONATE, // Default Impersonation

NULL,
// Authentication info

EOAC_NONE,
// Additional capabilities

NULL
// Reserved

);

if (FAILED(hres))

{

cout << "Failed to initialize security. Error code = 0x"

<< hex << hres << endl;

CoUninitialize();
                     return;

}

// Step 3: ---------------------------------------------------

// Obtain the initial locator to WMI -------------------------

IWbemLocator *pLoc = NULL;

hres = CoCreateInstance(

CLSID_WbemLocator,

0,

CLSCTX_INPROC_SERVER,

IID_IWbemLocator, (LPVOID *) &pLoc);

if (FAILED(hres))

{

cout << "Failed to create IWbemLocator object."

<< " Err code = 0x"

<< hex << hres << endl;

CoUninitialize();

return ;
// Program has failed.

}

// Step 4: -----------------------------------------------------

// Connect to WMI through the IWbemLocator::ConnectServer method

IWbemServices *pSvc = NULL;

// Connect to the root\cimv2 namespace with

// the current user and obtain pointer pSvc

// to make IWbemServices calls.

hres = pLoc->ConnectServer(

_bstr_t(L"ROOT\\WMI"), // Object path of WMI namespace

NULL,
// User name. NULL = current user

NULL,
// User password. NULL = current

0,
// Locale. NULL indicates current

NULL,
// Security flags.

0,
// Authority (e.g. Kerberos)

0,
// Context object

&pSvc
// pointer to IWbemServices proxy

);

if (FAILED(hres))

{

cout << "Could not connect. Error code = 0x"

<< hex << hres << endl;

pLoc->Release();

CoUninitialize();

return ;
// Program has failed.

}

cout << "Connected to ROOT\\CIMV2 WMI namespace" << endl;

// Step 5: --------------------------------------------------

// Set security levels on the proxy -------------------------

hres = CoSetProxyBlanket(

pSvc,
// Indicates the proxy to set

RPC_C_AUTHN_WINNT,
// RPC_C_AUTHN_xxx

RPC_C_AUTHZ_NONE,
// RPC_C_AUTHZ_xxx

NULL,

// Server principal name

RPC_C_AUTHN_LEVEL_CALL,
// RPC_C_AUTHN_LEVEL_xxx

RPC_C_IMP_LEVEL_IMPERSONATE, // RPC_C_IMP_LEVEL_xxx

NULL,
// client identity

EOAC_NONE
// proxy capabilities

);

if (FAILED(hres))

{

cout << "Could not set proxy blanket. Error code = 0x"

<< hex << hres << endl;

pSvc->Release();

pLoc->Release();

CoUninitialize();

return ;
// Program has failed.

}

// Step 6: --------------------------------------------------

// Use the IWbemServices pointer to make requests of WMI ----

// For example, get the name of the operating system

IEnumWbemClassObject* pEnumerator = NULL;

hres = pSvc->ExecQuery(

bstr_t("WQL"),

bstr_t("SELECT * FROM MSI_System"),

WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,

NULL,

&pEnumerator);

if (FAILED(hres))

{

cout << "Query for operating system name failed."

<< " Error code = 0x"

<< hex << hres << endl;

pSvc->Release();

pLoc->Release();

CoUninitialize();

return;

// Program has failed.

}

// Step 7: -------------------------------------------------

// Get the data from the query in step 6 -------------------

IWbemClassObject *pclsObj;

ULONG uReturn = 0;

int count = 0;

while (pEnumerator)

{

HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1,

&pclsObj, &uReturn);

if(0 == uReturn)

{

break;

}

                                 if(++count == 3)

{

CString tmp;

tmp.Format(_T("%d"),seconds);

// Set up the property value.

VARIANT v;

VariantInit(&v);

V_VT(&v) = VT_BSTR;

V_BSTR(&v) = tmp.AllocSysString(); // - decimal format, not hex

hr = pclsObj->

ut(L"System",0,&v,CIM_UINT8);
                                             // Clean up.

VariantClear(&v);

                                             if (hr == WBEM_E_ACCESS_DENIED)

{

printf("WBEM_E_ACCESS_DENIED\n");

                                                         // Processing to handle specific error code

}
                                             else if (hr == WBEM_S_DUPLICATE_OBJECTS)

{

printf("WBEM_S_DUPLICATE_OBJECTS\n");
                                                         // All other cases, including errors specific to COM

}
                                             else if (hr == WBEM_E_INVALID_OBJECT)

{

printf("WBEM_E_INVALID_OBJECT\n");

}
                                             else if(hr == WBEM_E_INVALID_PARAMETER)

{

printf("WBEM_E_INVALID_PARAMETER\n");

}
                                             else if(hr == WBEM_S_NO_ERROR)

{

printf("WBEM_S_NO_ERROR\n");

}
                                             else

printf("ERROR:%x",hr);

HRESULT hRes = pSvc->

utInstance(pclsObj,WBEM_FLAG_CREATE_OR_UPDATE,0,0);

                                             // Check for specific error and status codes.
                                             if (hRes == WBEM_E_ACCESS_DENIED)

{

printf("WBEM_E_ACCESS_DENIED\n");

                                                         // Processing to handle specific error code

}
                                             else if (hRes == WBEM_S_DUPLICATE_OBJECTS)

{

printf("WBEM_S_DUPLICATE_OBJECTS\n");
                                                         // All other cases, including errors specific to COM

}
                                             else if (hRes == WBEM_E_INVALID_OBJECT)

{

printf("WBEM_E_INVALID_OBJECT\n");

}
                                             else if(hRes == WBEM_E_INVALID_PARAMETER)

{

printf("WBEM_E_INVALID_PARAMETER\n");

}
                                             else if(hRes == WBEM_S_NO_ERROR)

{

printf("WBEM_S_NO_ERROR\n");

}

}

}

// Cleanup

// ========

pSvc->Release();

pLoc->Release();

pEnumerator->Release();

pclsObj->Release();

CoUninitialize();

}
以上就是该程序实现的全部过程，完整的source code可以在附件下载。S5 wake up使用了WMI ACPI，
该部分比较复杂，我在后续会发一个WMIACPI的系列，完整的描述WMI ACPI实现过程中

BIOS,EC,OS,Driver分别扮演的角色。

that's all!

Peter

[ 本帖最后由 peterhu 于 2009-6-3 14:25 编辑 ]

woodern · 发表于 2009-6-17 08:29:28

good. MARKED.

Faintsnow · 发表于 2009-7-11 12:39:02

Peter老大，我试了下S3,你通过重载WindowProc将机器从S3唤醒.但是唤醒以后Monitor没有显示啊？

蓝色永恒 · 发表于 2011-9-15 17:14:03

请教一个问题,S3/4/5 大家都做出来了, S1 的功能不知道有没有相应的 API可以调用呢? Suspend.exe 有类似的测试S1的选项,不知道是怎么实现的,谁知道麻烦讲一下,谢谢

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