Bewerken

Delen via

StorPortPoFxSetPerfState function (storport.h)

  • Artikel

StorPortPoFxSetPerfState sets a component's P-state (performance or "perf" state).

Syntax

ULONG StorPortPoFxSetPerfState(
  PVOID         HwDeviceExtension,
  PSTOR_ADDRESS Address,
  ULONG         Component,
  ULONG         Flags,
  ULONG         SetIndex,
  ULONG         State,
  PVOID         Context
);

Parameters

HwDeviceExtension

Pointer to the miniport's device extension.

Address

Address of the device being registered. Currently only adapters are supported, so Address must be NULL.

Component

The index that identifies the component whose P-states will be managed. This parameter is an index into the Componentsarray in the STOR_POFX_DEVICE structure that the miniport used to register the device for Storport PoFx support. If the Components array contains N elements, component indexes range from 0 to N–1.

Flags

Currently must be set to NULL.

SetIndex

The index of a previously registered perf set.

State

If the perf set contains discrete P-States, this should be an index value. If the perf set is a range, this should be a value within that range.

Context

An arbitrary context that will be passed to the perf set change callback.

Return value

StorPortPoFxSetPerfState returns STOR_STATUS_SUCCESS upon successful completion or if runtime power has been disabled, or an error code such as one of the following:

Error code Meaning
STOR_STATUS_INVALID_PARAMETER One of the parameters is invalid; for example, Address or Flags are not NULL.
STOR_STATUS_UNSUCCESSFUL The adapter isn't registered for idle detection.

Requirements

Requirement Value
Minimum supported client Windows 8
Header storport.h