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HwStorPassiveInitializeRoutine routine

The HwStorPassiveInitializeRoutine callback routine is called after the HwStorInitialize routine when the current IRQL is at PASSIVE_LEVEL. The HwStorPassiveInitializeRoutine callback is set by calling the StorPortEnablePassiveInitialization routine. Initializing of the miniport's deferred procedure calls (DPCs) occurs in the HwStorPassiveInitializeRoutine callback.



BOOLEAN HwStorPassiveInitializeRoutine(
   IN PVOID HwDeviceExtension
{ ... }



A pointer to a per-adapter storage area.

Return value

The HwStorPassiveInitializeRoutine routine returns TRUE if the miniport successfully initialized the processing of DPCs, or FALSE if the initialization process failed.


The HwStorPassiveInitializeRoutine routine should initialize any DPCs that the miniport driver will use. The port driver calls HwStorPassiveInitializeRoutine at PASSIVE_LEVEL without any spin locks held. Interrupts are enabled while this routine is called.

The name HwStorPassiveInitializeRoutine is just a placeholder. The actual prototype for this callback routine is defined in storport.has follows:

  _In_ PVOID DeviceExtension

The port driver calls the HwStorPassiveInitializeRoutine routine at PASSIVE IRQL without acquiring any spin locks.


To define an HwStorPassiveInitializeRoutine callback function, you must first provide a function declaration that identifies the type of callback function you’re defining. Windows provides a set of callback function types for drivers. Declaring a function using the callback function types helps Code Analysis for Drivers, Static Driver Verifier (SDV), and other verification tools find errors, and it’s a requirement for writing drivers for the Windows operating system.

For example, to define a HwStorPassiveInitializeRoutine callback routine that is named MyHwPassiveInitialize, use the HW_PASSIVE_INITIALIZE_ROUTINE type as shown in this code example:


Then, implement your callback routine as follows:

MyHwPassiveInitialize (
  _In_ PVOID  DeviceExtension

The HW_PASSIVE_INITIALIZE_ROUTINE function type is defined in the Storport.h header file. To more accurately identify errors when you run the code analysis tools, be sure to add the _Use_decl_annotations_ annotation to your function definition. The _Use_decl_annotations_ annotation ensures that the annotations that are applied to the HW_PASSIVE_INITIALIZE_ROUTINE function type in the header file are used. For more information about the requirements for function declarations, see Declaring Functions Using Function Role Types for Storport Drivers. For information about _Use_decl_annotations_, see Annotating Function Behavior.


Target platform



Storport.h (include Storport.h)


PASSIVE_LEVEL (See Remarks section.)

See also




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