miniport.c

这个还是关于驱动与应用层通信的,主要是中间层的问题

        if (Status != NDIS_STATUS_PENDING)
        {
            *BytesRead = pAdapt->Request.DATA.SET_INFORMATION.BytesRead;
            *BytesNeeded = pAdapt->Request.DATA.SET_INFORMATION.BytesNeeded;
            pAdapt->OutstandingRequests = FALSE;
        }

    } while (FALSE);

    return(Status);
}


VOID
MPProcessSetPowerOid(
    IN OUT PNDIS_STATUS          pNdisStatus,
    IN PADAPT                    pAdapt,
    IN PVOID                     InformationBuffer,
    IN ULONG                     InformationBufferLength,
    OUT PULONG                   BytesRead,
    OUT PULONG                   BytesNeeded
    )
/*++

Routine Description:
    This routine does all the procssing for a request with a SetPower Oid
    The miniport shoud accept  the Set Power and transition to the new state

    The Set Power should not be passed to the miniport below

    If the IM miniport is going into a low power state, then there is no guarantee if it will ever
    be asked go back to D0, before getting halted. No requests should be pended or queued.

    
Arguments:
    pNdisStatus           - Status of the operation
    pAdapt                - The Adapter structure
    InformationBuffer     - The New DeviceState
    InformationBufferLength
    BytesRead             - No of bytes read
    BytesNeeded           -  No of bytes needed


Return Value:
    Status  - NDIS_STATUS_SUCCESS if all the wait events succeed.

--*/
{

    
    NDIS_DEVICE_POWER_STATE NewDeviceState;

    DBGPRINT(("==>MPProcessSetPowerOid: Adapt %p\n", pAdapt)); 

    ASSERT (InformationBuffer != NULL);

    *pNdisStatus = NDIS_STATUS_FAILURE;

    do 
    {
        //
        // Check for invalid length
        //
        if (InformationBufferLength < sizeof(NDIS_DEVICE_POWER_STATE))
        {
            *pNdisStatus = NDIS_STATUS_INVALID_LENGTH;
            break;
        }

        NewDeviceState = (*(PNDIS_DEVICE_POWER_STATE)InformationBuffer);

        //
        // Check for invalid device state
        //
        if ((pAdapt->MPDeviceState > NdisDeviceStateD0) && (NewDeviceState != NdisDeviceStateD0))
        {
            //
            // If the miniport is in a non-D0 state, the miniport can only receive a Set Power to D0
            //
            ASSERT (!(pAdapt->MPDeviceState > NdisDeviceStateD0) && (NewDeviceState != NdisDeviceStateD0));

            *pNdisStatus = NDIS_STATUS_FAILURE;
            break;
        }    

        //
        // Is the miniport transitioning from an On (D0) state to an Low Power State (>D0)
        // If so, then set the StandingBy Flag - (Block all incoming requests)
        //
        if (pAdapt->MPDeviceState == NdisDeviceStateD0 && NewDeviceState > NdisDeviceStateD0)
        {
            pAdapt->StandingBy = TRUE;
        }

        //
        // If the miniport is transitioning from a low power state to ON (D0), then clear the StandingBy flag
        // All incoming requests will be pended until the physical miniport turns ON.
        //
        if (pAdapt->MPDeviceState > NdisDeviceStateD0 &&  NewDeviceState == NdisDeviceStateD0)
        {
            pAdapt->StandingBy = FALSE;
        }
        
        //
        // Now update the state in the pAdapt structure;
        //
        pAdapt->MPDeviceState = NewDeviceState;
        
        *pNdisStatus = NDIS_STATUS_SUCCESS;
    

    } while (FALSE);    
        
    if (*pNdisStatus == NDIS_STATUS_SUCCESS)
    {
        //
        // The miniport resume from low power state
        // 
        if (pAdapt->StandingBy == FALSE)
        {
            //
            // If we need to indicate the media connect state
            // 
            if (pAdapt->LastIndicatedStatus != pAdapt->LatestUnIndicateStatus)
            {
               NdisMIndicateStatus(pAdapt->MiniportHandle,
                                        pAdapt->LatestUnIndicateStatus,
                                        (PVOID)NULL,
                                        0);
               NdisMIndicateStatusComplete(pAdapt->MiniportHandle);
               pAdapt->LastIndicatedStatus = pAdapt->LatestUnIndicateStatus;
            }
        }
        else
        {
            //
            // Initialize LatestUnIndicatedStatus
            //
            pAdapt->LatestUnIndicateStatus = pAdapt->LastIndicatedStatus;
        }
        *BytesRead = sizeof(NDIS_DEVICE_POWER_STATE);
        *BytesNeeded = 0;
    }
    else
    {
        *BytesRead = 0;
        *BytesNeeded = sizeof (NDIS_DEVICE_POWER_STATE);
    }

    DBGPRINT(("<==MPProcessSetPowerOid: Adapt %p\n", pAdapt)); 
}


VOID
MPReturnPacket(
    IN NDIS_HANDLE             MiniportAdapterContext,
    IN PNDIS_PACKET            Packet
    )
/*++

Routine Description:

    NDIS Miniport entry point called whenever protocols are done with
    a packet that we had indicated up and they had queued up for returning
    later.

Arguments:

    MiniportAdapterContext    - pointer to ADAPT structure
    Packet    - packet being returned.

Return Value:

    None.

--*/
{
    PADAPT            pAdapt = (PADAPT)MiniportAdapterContext;

#ifdef NDIS51
    //
    // Packet stacking: Check if this packet belongs to us.
    //
    if (NdisGetPoolFromPacket(Packet) != pAdapt->RecvPacketPoolHandle)
    {
        //
        // We reused the original packet in a receive indication.
        // Simply return it to the miniport below us.
        //
        NdisReturnPackets(&Packet, 1);
    }
    else
#endif // NDIS51
    {
        //
        // This is a packet allocated from this IM's receive packet pool.
        // Reclaim our packet, and return the original to the driver below.
        //

        PNDIS_PACKET    MyPacket;
        PRECV_RSVD      RecvRsvd;
    
        RecvRsvd = (PRECV_RSVD)(Packet->MiniportReserved);
        MyPacket = RecvRsvd->OriginalPkt;
    
        NdisFreePacket(Packet);
        NdisReturnPackets(&MyPacket, 1);
    }
}


NDIS_STATUS
MPTransferData(
    OUT PNDIS_PACKET            Packet,
    OUT PUINT                   BytesTransferred,
    IN NDIS_HANDLE              MiniportAdapterContext,
    IN NDIS_HANDLE              MiniportReceiveContext,
    IN UINT                     ByteOffset,
    IN UINT                     BytesToTransfer
    )
/*++

Routine Description:

    Miniport's transfer data handler.

Arguments:

    Packet                    Destination packet
    BytesTransferred          Place-holder for how much data was copied
    MiniportAdapterContext    Pointer to the adapter structure
    MiniportReceiveContext    Context
    ByteOffset                Offset into the packet for copying data
    BytesToTransfer           How much to copy.

Return Value:

    Status of transfer

--*/
{
    PADAPT        pAdapt = (PADAPT)MiniportAdapterContext;
    NDIS_STATUS   Status;

    //
    // Return, if the device is OFF
    //

    if (IsIMDeviceStateOn(pAdapt) == FALSE)
    {
        return NDIS_STATUS_FAILURE;
    }

    NdisTransferData(&Status,
                     pAdapt->BindingHandle,
                     MiniportReceiveContext,
                     ByteOffset,
                     BytesToTransfer,
                     Packet,
                     BytesTransferred);

    return(Status);
}

VOID
MPHalt(
    IN NDIS_HANDLE                MiniportAdapterContext
    )
/*++

Routine Description:

    Halt handler. All the hard-work for clean-up is done here.

Arguments:

    MiniportAdapterContext    Pointer to the Adapter

Return Value:

    None.

--*/
{
    PADAPT             pAdapt = (PADAPT)MiniportAdapterContext;
    NDIS_STATUS        Status;
    PADAPT            *ppCursor;

    DBGPRINT(("==>MiniportHalt: Adapt %p\n", pAdapt));

    //
    // Remove this adapter from the global list
    //
    NdisAcquireSpinLock(&GlobalLock);

    for (ppCursor = &pAdaptList; *ppCursor != NULL; ppCursor = &(*ppCursor)->Next)
    {
        if (*ppCursor == pAdapt)
        {
            *ppCursor = pAdapt->Next;
            break;
        }
    }

    NdisReleaseSpinLock(&GlobalLock);

// BEGIN_PTUSERIO
    //
    // Make Suprise Unbind Notification
    //
    DevOnUnbindAdapter( pAdapt->pOpenContext );
// END_PTUSERIO

    //
    // Delete the ioctl interface that was created when the miniport
    // was created.
    //
    (VOID)PtDeregisterDevice();

   if (pAdapt->BindingHandle != NULL)
   {
      NDIS_STATUS    LocalStatus;

      //
      // Close the binding to the adapter
      //

      NdisResetEvent(&pAdapt->Event);

      NdisCloseAdapter(&LocalStatus, pAdapt->BindingHandle);
      pAdapt->BindingHandle = NULL;

      if (LocalStatus == NDIS_STATUS_PENDING)
      {
         NdisWaitEvent(&pAdapt->Event, 0);
         LocalStatus = pAdapt->Status;
      }

      ASSERT (LocalStatus == NDIS_STATUS_SUCCESS);
   }

// BEGIN_PTUSERIO
   //
   // Remove Reference To The Adapter
   //
   PtDerefAdapter( pAdapt );
// END_PTUSERIO

    DBGPRINT(("<== MiniportHalt: pAdapt %p\n", pAdapt));
}


#ifdef NDIS51_MINIPORT

VOID
MPCancelSendPackets(
    IN NDIS_HANDLE            MiniportAdapterContext,
    IN PVOID                  CancelId
    )
/*++

Routine Description:

    The miniport entry point to handle cancellation of all send packets
    that match the given CancelId. If we have queued any packets that match
    this, then we should dequeue them and call NdisMSendComplete for all
    such packets, with a status of NDIS_STATUS_REQUEST_ABORTED.

    We should also call NdisCancelSendPackets in turn, on each lower binding
    that this adapter corresponds to. This is to let miniports below cancel
    any matching packets.

Arguments:

    MiniportAdapterContext    - pointer to ADAPT structure
    CancelId    - ID of packets to be cancelled.

Return Value:

    None

--*/
{
    PADAPT    pAdapt = (PADAPT)MiniportAdapterContext;

    //
    // If we queue packets on our adapter structure, this would be 
    // the place to acquire a spinlock to it, unlink any packets whose
    // Id matches CancelId, release the spinlock and call NdisMSendComplete
    // with NDIS_STATUS_REQUEST_ABORTED for all unlinked packets.
    //

    //
    // Next, pass this down so that we let the miniport(s) below cancel
    // any packets that they might have queued.
    //
    NdisCancelSendPackets(pAdapt->BindingHandle, CancelId);

    return;
}

VOID
MPDevicePnPEvent(
    IN NDIS_HANDLE              MiniportAdapterContext,
    IN NDIS_DEVICE_PNP_EVENT    DevicePnPEvent,
    IN PVOID                    InformationBuffer,
    IN ULONG                    InformationBufferLength
    )
/*++

Routine Description:

    This handler is called to notify us of PnP events directed to
    our miniport device object.

Arguments:

    MiniportAdapterContext    - pointer to ADAPT structure
    DevicePnPEvent - the event
    InformationBuffer - Points to additional event-specific information
    InformationBufferLength - length of above

Return Value:

    None
--*/
{
    // TBD - add code/comments about processing this.

    UNREFERENCED_PARAMETER(MiniportAdapterContext);
    UNREFERENCED_PARAMETER(DevicePnPEvent);
    UNREFERENCED_PARAMETER(InformationBuffer);
    UNREFERENCED_PARAMETER(InformationBufferLength);
    
    return;
}

VOID
MPAdapterShutdown(
    IN NDIS_HANDLE                MiniportAdapterContext
    )
/*++

Routine Description:

    This handler is called to notify us of an impending system shutdown.

Arguments:

    MiniportAdapterContext    - pointer to ADAPT structure

Return Value:

    None
--*/
{
    UNREFERENCED_PARAMETER(MiniportAdapterContext);
    
    return;
}

#endif


// BEGIN_PTUSERIO

//
// Removed MPFreeAllPacketPools. Functionality incorporated in PtDerefAdapter.
//

// END_PTUSERIO