EVT_UCX_USBDEVICE_UPDATE - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// ucxusbdevice.h

EVT_UCX_USBDEVICE_UPDATE EvtUcxUsbdeviceUpdate;

VOID EvtUcxUsbdeviceUpdate(
  [in] UCXCONTROLLER UcxController,
  [in] WDFREQUEST Request
)
{...}
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nc-ucxusbdevice-evt_ucx_usbdevice_update)

EVT_UCX_USBDEVICE_UPDATE callback function

Description

The client driver's implementation that UCX calls to update device properties.

Parameters

UcxController [in]

A handle to the UCX controller that the client driver received in a previous call to the UcxControllerCreate method.

Request [in]

Contains the USBDEVICE_UPDATE structure.

Remarks

The UCX client driver registers this callback function with the USB host controller extension (UCX) by calling the UcxUsbDeviceCreate method.

The host controller driver communicates with the hardware to update descriptors, LPM parameters, whether device is a hub, and maximum exit latency, as needed.

The client driver returns completion status in Request. The driver can complete the WDFREQUEST asynchronously.

Examples

VOID
UsbDevice_EvtUcxUsbDeviceUpdate(
    UCXCONTROLLER      UcxController,
    WDFREQUEST         Request
)

{
    UNREFERENCED_PARAMETER(UcxController);

    DbgTrace(TL_INFO, UsbDevice, "UsbDevice_EvtUcxUsbDeviceUpdate");

    WDF_REQUEST_PARAMETERS_INIT(&wdfRequestParams);
    WdfRequestGetParameters(WdfRequest, &wdfRequestParams);
    usbDeviceUpdate = (PUSBDEVICE_UPDATE)wdfRequestParams.Parameters.Others.Arg1;
    ...

    WdfRequestComplete(Request, STATUS_SUCCESS);
}

See also

UCX_USBDEVICE_EVENT_CALLBACKS_INIT

USBDEVICE_UPDATE

UcxUsbDeviceCreate

UcxUsbDeviceInitSetEventCallbacks

View the official Windows Driver Kit DDI reference

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