EVT_UCX_ROOTHUB_GET_30PORT_INFO fungsi panggilan balik (ucxroothub.h)

  • Artikel

Implementasi driver klien yang dipanggil UCX ketika menerima permintaan informasi tentang port USB 3.0 di hub root.

Sintaks

EVT_UCX_ROOTHUB_GET_30PORT_INFO EvtUcxRoothubGet30PortInfo;

void EvtUcxRoothubGet30PortInfo(
  [in] UCXROOTHUB UcxRootHub,
  [in] WDFREQUEST Request
)
{...}

Parameter

[in] UcxRootHub

Handel ke objek UCX yang mewakili hub akar.

[in] Request

Struktur jenis _ROOTHUB_30PORT_INFO.

Nilai kembali

Tidak ada

Keterangan

Driver klien UCX mendaftarkan fungsi panggilan balik ini dengan ekstensi pengontrol host USB (UCX) dengan memanggil metode UcxRootHubCreate .

Array PortInfoArray dari struktur _ROOTHUB_30PORT_INFO berisi daftar port USB 3.0 yang didukung hub akar.

Driver klien mengembalikan status penyelesaian di Permintaan dan di USBD_STATUS di header URB. Driver dapat menyelesaikan WDFREQUEST secara asinkron.

Contoh

VOID
RootHub_EvtRootHubGet30PortInfo(
    UCXROOTHUB         UcxRootHub,
    WDFREQUEST         Request
)
/*++

    For sample demonstration purposes, this function returns statically
    defined information for the single 3.0 port.

--*/
{
    PUCX_ROOTHUB_CONTEXT    ucxRootHubContext;
    WDF_REQUEST_PARAMETERS  wdfRequestParams;
    PROOTHUB_30PORTS_INFO   rootHub30PortsInfo;
    NTSTATUS                status;

    ucxRootHubContext = GetUcxRootHubContext(UcxRootHub);

    WDF_REQUEST_PARAMETERS_INIT(&wdfRequestParams);
    WdfRequestGetParameters(Request, &wdfRequestParams);

    rootHub30PortsInfo = (PROOTHUB_30PORTS_INFO)wdfRequestParams.Parameters.Others.Arg1;

    if (rootHub30PortsInfo->Size < sizeof(ROOTHUB_30PORTS_INFO)) {
        DbgTrace(TL_ERROR, RootHub, "Invalid ROOTHUB_30PORTS_INFO Size %d", rootHub30PortsInfo->Size);
        status = STATUS_INVALID_PARAMETER;
        goto RootHub_EvtRootHubGet30PortInfoEnd;
    }

    if (rootHub30PortsInfo->NumberOfPorts != ucxRootHubContext->NumberOf30Ports) {
        DbgTrace(TL_ERROR, RootHub, "Invalid ROOTHUB_30PORTS_INFO NumberOfPorts %d", rootHub30PortsInfo->NumberOfPorts);
        status = STATUS_INVALID_PARAMETER;
        goto RootHub_EvtRootHubGet30PortInfoEnd;
    }

    if (rootHub30PortsInfo->PortInfoSize < sizeof(ROOTHUB_30PORT_INFO)) {
        DbgTrace(TL_ERROR, RootHub, "Invalid ROOTHUB_30PORT_INFO Size %d", rootHub30PortsInfo->PortInfoSize);
        status = STATUS_INVALID_PARAMETER;
        goto RootHub_EvtRootHubGet30PortInfoEnd;
    }

    //
    // Return static root hub 3.0 port information.
    //
    rootHub30PortsInfo->PortInfoArray[0]->PortNumber = ROOTHUB_30_PORT_PORT_NUMBER;
    rootHub30PortsInfo->PortInfoArray[0]->Removable = TriStateTrue;

    status = STATUS_SUCCESS;

    DbgTrace(TL_INFO, RootHub, "RootHub_EvtRootHubGet30PortInfo");

RootHub_EvtRootHubGet30PortInfoEnd:

    WdfRequestComplete(Request, status);
}

Persyaratan

Persyaratan Nilai
Target Platform Windows
Versi KMDF minimum 1,0
Versi UMDF minimum 2.0
Header ucxroothub.h (termasuk Ucxclass.h)
IRQL DISPATCH_LEVEL

Lihat juga

_ROOTHUB_30PORT_INFO