PCI_PM_CAPABILITY structure (wdm.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
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
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 Capabilities member.
PMCSR_BSE
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
| Requirement | Value |
|---|---|
| Header | wdm.h (include Wdm.h, Miniport.h) |