PCI_EXPRESS_SLOT_CONTROL_REGISTER union (ntddk.h)

The PCI_EXPRESS_SLOT_CONTROL_REGISTER structure describes a PCI Express (PCIe) slot control register of a PCIe capability structure.

Syntax

typedef union _PCI_EXPRESS_SLOT_CONTROL_REGISTER {
  struct {
    USHORT AttentionButtonEnable  :1;
    USHORT PowerFaultDetectEnable  :1;
    USHORT MRLSensorEnable;
    USHORT PresenceDetectEnable  :1;
    USHORT CommandCompletedEnable  :1;
    USHORT HotPlugInterruptEnable  :1;
    USHORT AttentionIndicatorControl  :2;
    USHORT PowerIndicatorControl  :2;
    USHORT PowerControllerControl  :1;
    USHORT ElectromechanicalLockControl  :1;
    USHORT DataLinkStateChangeEnable  :1;
    USHORT Rsvd  :3;
  };
  USHORT AsUSHORT;
} PCI_EXPRESS_SLOT_CONTROL_REGISTER, *PPCI_EXPRESS_SLOT_CONTROL_REGISTER;

Members

DUMMYSTRUCTNAME

DUMMYSTRUCTNAME.AttentionButtonEnable

A single bit that indicates that the attention button for the slot is enabled to generate events.

DUMMYSTRUCTNAME.PowerFaultDetectEnable

A single bit that indicates that power fault detection for the slot is enabled to generate events.

DUMMYSTRUCTNAME.MRLSensorEnable

A single bit that indicates that the manually operated retention latch (MRL) sensor for the slot is enabled to generate events.

DUMMYSTRUCTNAME.PresenceDetectEnable

A single bit that indicates that card presence detection for the slot is enabled to generate events.

DUMMYSTRUCTNAME.CommandCompletedEnable

A single bit that indicates that notification is enabled for the slot when an issued command is completed by the hot-plug controller.

DUMMYSTRUCTNAME.HotPlugInterruptEnable

A single bit that indicates that interrupts for the slot are enabled for hot-plug events.

DUMMYSTRUCTNAME.AttentionIndicatorControl

The state of the slot's attention indicator. Possible values are:

IndicatorOn

The indicator is on.

IndicatorBlink

The indicator is blinking.

IndicatorOff

The indicator is off.

DUMMYSTRUCTNAME.PowerIndicatorControl

The state of the slot's power indicator. Possible values are:

IndicatorOn

The indicator is on.

IndicatorBlink

The indicator is blinking.

IndicatorOff

The indicator is off.

DUMMYSTRUCTNAME.PowerControllerControl

The state of the slot's power controller. Possible values are:

PowerOn

The power is on.

PowerOff

The power is off.

DUMMYSTRUCTNAME.ElectromechanicalLockControl

This member always contains zero.

DUMMYSTRUCTNAME.DataLinkStateChangeEnable

A single bit that indicates that notification is enabled for the slot for changes to the data link layer active bit of the link status register of the PCIe capability structure.

DUMMYSTRUCTNAME.Rsvd

Reserved.

AsUSHORT

A USHORT representation of the contents of the PCI_EXPRESS_SLOT_CONTROL_REGISTER structure.

Remarks

The PCI_EXPRESS_SLOT_CONTROL_REGISTER structure is available in Windows Server 2008 and later versions of Windows.

A PCI_EXPRESS_SLOT_CONTROL_REGISTER structure is contained in the PCI_EXPRESS_CAPABILITY structure.

Requirements

Requirement	Value
Header	ntddk.h (include Ntddk.h, Miniport.h)

See also

PCI_EXPRESS_CAPABILITY