Dfu driver wdm to wdf

[zaheerkhan]

I have to port the code from WDM to wdf for dfu driver.
Below is the code :

wdm
========

DeviceControl(KIrp I)
{

switch (I.IoctlCode ())

{

case GETSTATE:

GetState();

}

GetState (KIrp I)
{

NTSTATUS status = STATUS_UNSUCCESSFUL;

I.Information () = 0;

if (I.IoctlBuffer () &&
I.IoctlInputBufferSize () == 0 &&
I.IoctlOutputBufferSize ())
{
status = SendCommand ((UCHAR *) I.IoctlBuffer (), I.IoctlOutputBufferSize (),
GETSTATE, 0, true, true, 0);
I.Information () = sizeof UCHAR;
}
else
{
status = STATUS_INVALID_PARAMETER;
}

return status;
}

SendCommand (UCHAR * buffer, ULONG size, UCHAR request, USHORT value,
bool In, bool ShortOk, ULONG * info)
{
NTSTATUS status = STATUS_UNSUCCESSFUL;

T.Trace (TraceInfo, "> " __FUNCTION__ "\n");

PURB pUrb = m_DfuInterface.BuildClassRequest (buffer, // Transfer buffer
size, // Transfer buffer size
0, // Request reserved bits
request, // Request
value, // Value
In, // In
ShortOk, // Short OK
NULL, // Link URB
NULL); // URB

if (pUrb != NULL)
{
status = m_DfuInterface.SubmitUrb (pUrb);

if (NT_SUCCESS (status) && info)
{
*info = (USHORT)pUrb->UrbControlVendorClassRequest.TransferBufferLength;
}
if (NT_ERROR (status))
{
t << "SendCommand (" << request << "): FAILED\n";
t << " NTSTATUS = " << ULONG (status) << "\n";
t << " URB status = " << ULONG (pUrb->UrbHeader.Status) << "\n";
}
delete pUrb;
}
else
{
T << "SendCommand: STATUS_INSUFFICIENT_RESOURCES" << "\n";
status = STATUS_INSUFFICIENT_RESOURCES;
}

return status;
}

wdf
=====

EvtIoDeviceControl(
IN WDFQUEUE Queue,
IN WDFREQUEST Request,
IN size_t OutputBufferLength,
IN size_t InputBufferLength,
IN ULONG IoControlCode
)
{

device = WdfIoQueueGetDevice(Queue);
pDevContext = GetDeviceContext(device);

switch(IoControlCode) {

code GETSTATE:
getstate(pDevContext->WdfUsbTargetDevice,Request);

}

NTSTATUS getstate(WDFUSBDEVICE Device,WDFREQUEST request)
{
PURB pUrb = NULL;
WDFMEMORY urbMemory;
WDF_OBJECT_ATTRIBUTES objectAttribs;
PULONG nbytes;

USHORT usUrbSize;
WDF_MEMORY_DESCRIPTOR memoryDesc;
PWDF_USB_CONTROL_SETUP_PACKET controlSetupPacket;

usUrbSize = (USHORT)sizeof(struct
_URB_CONTROL_VENDOR_OR_CLASS_REQUEST);

WDF_OBJECT_ATTRIBUTES_INIT(&objectAttribs);
objectAttribs.ParentObject = Device;

status = WdfMemoryCreate(&objectAttribs,
NonPagedPool,
POOL_TAG,
usUrbSize,
&urbMemory,
(PVOID*) &pUrb);

if (!NT_SUCCESS(status)) {
UsbDfu_DbgPrint(1, ("Failed to alloc mem for urb\n"));
status = STATUS_INSUFFICIENT_RESOURCES;
return status;
}

WDF_MEMORY_DESCRIPTOR_INIT_HANDLE(&memoryDesc, urbMemory,
(USHORT)sizeof(URB));

WDF_USB_CONTROL_SETUP_PACKET_INIT_CLASS(&controlSetupPacket,
BMREQUEST_DEVICE_TO_HOST,
BMREQUEST_TO_INTERFACE,
DFU_GETSTATE,// Request(DFU_DETACH,DFU_DNLOAD etc)
0, //value
0); //Index

status = WdfUsbTargetDeviceFormatRequestForControlTransfer(
Device,
WDF_NO_HANDLE,
&controlSetupPacket,
memoryDesc,
NULL
);
if (!NT_SUCCESS(status)){
return status;
}
WdfRequestSetCompletionRoutine(
request,
MyCompletionRoutine,
NULL
);
if (WdfRequestSend(request, FmDeviceData->WdfUsbTargetDevice,NULL) == FALSE)
{
status = WdfRequestGetStatus(request);
}

}

VOID
MyCompletionRoutine (
IN WDFREQUEST Request,
IN WDFIOTARGET Target,
IN PWDF_REQUEST_COMPLETION_PARAMS CompletionParams,
IN WDFCONTEXT Context
)
{
NTSTATUS status;
WDFMEMORY memoryHandle=Context;
PUCHAR charPointer=NULL;
UCHAR count =0;
size_t length=0;
PWDF_USB_REQUEST_COMPLETION_PARAMS usbCompletionParams;

UNREFERENCED_PARAMETER(Target);
UNREFERENCED_PARAMETER(Context);
DbgPrint("Entered %s\n",__FUNCTION__);

status = CompletionParams->IoStatus.Status;
usbCompletionParams = CompletionParams->Parameters.Usb.Completion;

DbgPrint("%s: request Status 0x%x UsbdStatus 0x%x\n",__FUNCTION__,status,
usbCompletionParams->UsbdStatus);

WdfObjectDelete(Request);
DbgPrint("Leaving %s\n",__FUNCTION__);
return;

}

===============================================

Does the above code look good ?. Also how do I get the outputbuffersize and inputbuffersize ?

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[Brandon Wilson [MSFT]]

You can use WdfRequestGetParameters to obtain additional information about
the Request including buffer lengths.

"Zaheer Khan" wrote in message news:2009112310...@yahoo.com...

[Doron Holan [MSFT]]

this:
WDF_MEMORY_DESCRIPTOR_INIT_HANDLE(&memoryDesc, urbMemory,
(USHORT)sizeof(URB));

should be
WDF_MEMORY_DESCRIPTOR_INIT_HANDLE(&memoryDesc, urbMemory, usUrbSize );

and you should probably also set a timeout on the send in case your control
transfer fails

d

--

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"Zaheer Khan" wrote in message news:2009112310...@yahoo.com...
>

[zaheerkhan]

Thanks for all your replies.

How do I get hold of the "output or input buffer address" being passed to EvtIoDeviceControl, from where I can transfer data from/to the device.

Doron Holan [MSFT] wrote:

this:WDF_MEMORY_DESCRIPTOR_INIT_HANDLE(&memoryDesc,
23-Nov-09

this:
WDF_MEMORY_DESCRIPTOR_INIT_HANDLE(&memoryDesc, urbMemory,
(USHORT)sizeof(URB));

should be
WDF_MEMORY_DESCRIPTOR_INIT_HANDLE(&memoryDesc, urbMemory, usUrbSize );

and you should probably also set a timeout on the send in case your control
transfer fails

d

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WdfRequestRetrieveInputMemory
WdfRequestRetrieveInputBuffer
WdfRequestRetrieveInputWdmMdl

WdfRequestRetrieveInputBuffer
WdfRequestRetrieveOutputMemory
WdfRequestRetrieveOutputWdmMdl

return the buffers in various forms

d
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"Zaheer Khan" wrote in message news:2009112415...@yahoo.com...