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ns-ucxroothub-_hub_info_from_parent.md

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UID title description old-location tech.root ms.date keywords ms.keywords req.header req.include-header req.target-type req.target-min-winverclnt req.target-min-winversvr req.kmdf-ver req.umdf-ver req.ddi-compliance req.unicode-ansi req.idl req.max-support req.namespace req.assembly req.type-library req.lib req.dll req.irql targetos req.typenames f1_keywords topic_type api_type api_location api_name
NS:ucxroothub._HUB_INFO_FROM_PARENT
_HUB_INFO_FROM_PARENT (ucxroothub.h)
Describes information about a hub from its parent device.
buses\_hub_info_from_parent.htm
usbref
05/07/2018
HUB_INFO_FROM_PARENT structure
*PHUB_INFO_FROM_PARENT, HUB_INFO_FROM_PARENT, HUB_INFO_FROM_PARENT structure [Buses], P_HUB_INFO_FROM_PARENT, P_HUB_INFO_FROM_PARENT structure pointer [Buses], _HUB_INFO_FROM_PARENT, buses._hub_info_from_parent, ucxroothub/P_HUB_INFO_FROM_PARENT, ucxroothub/_HUB_INFO_FROM_PARENT
ucxroothub.h
Ucxclass.h
Windows
Windows
HUB_INFO_FROM_PARENT, *PHUB_INFO_FROM_PARENT
_HUB_INFO_FROM_PARENT
ucxroothub/_HUB_INFO_FROM_PARENT
PHUB_INFO_FROM_PARENT
ucxroothub/PHUB_INFO_FROM_PARENT
HUB_INFO_FROM_PARENT
ucxroothub/HUB_INFO_FROM_PARENT
APIRef
kbSyntax
HeaderDef
ucxroothub.h
_HUB_INFO_FROM_PARENT
PHUB_INFO_FROM_PARENT
HUB_INFO_FROM_PARENT

_HUB_INFO_FROM_PARENT structure

-description

Describes information about a hub from its parent device.

-struct-fields

-field IoTarget

A pointer to the WDM device object of the parent that represents the I/O target.

-field DeviceDescriptor

A USB_DEVICE_DESCRIPTOR structure that contains the device descriptor.

-field U1ExitLatency

The time to transition from the U1 state.

-field U2ExitLatency

The time to transition from the U2 state.

-field ExitLatencyOfSlowestLinkForU1

The exit latency for the slowest link for U1 transition.

-field DepthOfSlowestLinkForU1

The depth of the hub based on which the latency for the slowest link is calculated for a U1 transition.

-field ExitLatencyOfSlowestLinkForU2

The exit latency for the slowest link for U2 transition.

-field DepthOfSlowestLinkForU2

The depth of the hub based on which the latency for the slowest link is calculated for a U2 transition.

-field HostInitiatedU1ExitLatency

Host-initiated exit latency to transition from the U1 state.

-field HostInitiatedU2ExitLatency

Host-initiated exit latency to transition from the U2 state.

-field TotalHubDepth

Total hub depth.

-field TotalTPPropogationDelay

The total TP propagation delay.

-field HubFlags

A bitwise-OR of PARENT_HUB_FLAGS flags.

-field SublinkSpeedAttr

A pointer to a USB_DEVICE_CAPABILITY_SUPERSPEEDPLUS_SPEED structure that describes the USB 3.1 capability's sublink speed attributes. For structure declaration, see Usbspec.h

-field SublinkSpeedAttrCount

The count of sublink speed attributes.