PCI_PM_CAPABILITY structure (miniport.h)

The PCI_PM_CAPABILITY structure reports the power management capabilities of the device.

Syntax

typedef struct _PCI_PM_CAPABILITY {
  PCI_CAPABILITIES_HEADER Header;
  union {
    PCI_PMC Capabilities;
    USHORT  AsUSHORT;
  } PMC;
  union {
    PCI_PMCSR ControlStatus;
    USHORT    AsUSHORT;
  } PMCSR;
  union {
    PCI_PMCSR_BSE BridgeSupport;
    UCHAR         AsUCHAR;
  } PMCSR_BSE;
  UCHAR                   Data;
} PCI_PM_CAPABILITY, *PPCI_PM_CAPABILITY;

Members

Header

Contains a structure of type PCI_CAPABILITIES_HEADER that identifies the capability and provides a link to the next capability description.

PMC

The power management capabilities union (offset = 2).

PMC.Capabilities

Contains a structure of type PCI_PMC that specifies the power management capabilities of the device. This information was retrieved from the power management capabilities register (offset 2 in the power management register block). For more information about the contents of the power management capabilities register, see the PCI Power Management Specification.

PMC.AsUSHORT

Contains the same data as the Capabilities member.

PMCSR

The power management control/status union (offset = 4).

PMCSR.ControlStatus

Contains a structure of type PCI_PMCSR that reports the contents of the power management control status register. This register is used to monitor power management event signals and manage the device's power state. For more information about the contents of the power management control status register, see the PCI Power Management Specification.

PMCSR.AsUSHORT

Contains the same data as the ControlStatus member.

PMCSR_BSE

The PMCSR PCI-PCI bridge support extensions union.

PMCSR_BSE.BridgeSupport

Contains a structure of type PCI_PMCSR_BSE that reports the contents of the power management control status register for PCI bridge support extensions.

PMCSR_BSE.AsUCHAR

Contains the same data as the BridgeSupport member.

Data

Holds the contents of an optional data register that the device uses to report state-dependent operating data, such as heat dissipation or how much power the device has consumed.

Requirements

See also

PCI_PMCSR

PCI_CAPABILITIES_HEADER

PCI_PMC

PCI_PMCSR_BSE