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StorPortPoFxSetComponentResidency function (storport.h)

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The StorPortPoFxSetComponentResidency routine sets the estimated time for how long a storage device component is likely to remain idle after the component enters the idle condition.

Syntax

ULONG StorPortPoFxSetComponentResidency(
  [in]           PVOID         HwDeviceExtension,
  [in, optional] PSTOR_ADDRESS Address,
  [in]           ULONG         Component,
  [in]           ULONGLONG     Residency
);

Parameters

[in] HwDeviceExtension

A pointer to the hardware device extension for the host bus adapter (HBA). This is the device extension used to register the device in a prior call to StorPortInitializePoFxPower.

[in, optional] Address

The address of a storage device unit. This parameter is NULL when setting the residency of a storage adapter component.

[in] Component

The index that identifies the component. This parameter is an index into the Components array in the STOR_POFX_DEVICE structure that the miniport driver registered for the device with a call to StorPortInitializePoFxPower. If the Components array contains N elements, component indexes range from 0 to N–1.

[in] Residency

The estimated residency time, in 100-nanosecond units. This parameter is a hint to power management framework (PoFx) about how long the component is likely to remain idle after a transition from the active condition to the idle condition.

Return value

The StorPortPoFxSetComponentResidency routine returns one of these status codes:

Return code Description
STOR_STATUS_SUCCESS
 The component residency is successfully set.
STOR_STATUS_INVALID_PARAMETER
 Either HwDeviceExtension or Device is NULL.

-or-

Address points to an invalid unit address structure.

-or-

The storage device specified by Address is not found.

-or-

The index in Component specifies a component greater than the component count for the device.
STOR_STATUS_INVALID_DEVICE_REQUEST
 The storage device is not registered with the PoFx.
STOR_STATUS_INVALID_IRQL
 The current IRQL > DISPATCH_LEVEL.

Requirements

Requirement Value
Minimum supported client Available in starting with Windows 8.
Target Platform Universal
Header storport.h
Library Storport.lib
IRQL <= DISPATCH_LEVEL

See also

PoFxSetComponentResidency