KMDF event handler equivalent of DRIVER_STARTIO routine in WDM

NTDEV
1

Hello,

Is there an equivalent event handler in KMDF to the DRIVER_STARTIO routine in WDM? I have a DRIVER_STARTIO routine in a WDM driver, which I am porting to KMDF and I would like to port this code to a framework based driver. IRP_MJ_Xxx requests are a straightforward translation to KMDF event handlers, however I am having difficulty finding the equivalent event handler(s) for the WDM DRIVER_STARTIO routine.

I appreciate any help.

Thank You Very Much,
Earl

2

xxxxx@gmail.com wrote:

Is there an equivalent event handler in KMDF to the DRIVER_STARTIO routine in WDM? I have a DRIVER_STARTIO routine in a WDM driver, which I am porting to KMDF and I would like to port this code to a framework based driver. IRP_MJ_Xxx requests are a straightforward translation to KMDF event handlers, however I am having difficulty finding the equivalent event handler(s) for the WDM DRIVER_STARTIO routine.

Well, sort of. It’s not too hard to convert a StartIo driver to KMDF.
Instead of a StartIo routine, you can create a WDFQUEUE and assign an
EvtIoDefault handler. That handler will get all of the IRPs flowing
into the queue. You can decide whether it needs to be a serial queue or
parallel queue. The queue also has the ability to call separate
handlers for the different types of IRP (read, write, ioctl); you might
consider whether it makes sense to split up your big switch statement
and let KMDF do the dispatching.

https://msdn.microsoft.com/en-us/windows/hardware/drivers/wdf/differences-between-wdm-and-kmdf

–
Tim Roberts, xxxxx@probo.com
Providenza & Boekelheide, Inc.

3

Startio is basically a sequential queue. It translates really well to a sequential WDFQUEUE (and set the execution level to dispatch level if you want true equivalence)

-----Original Message-----
From: xxxxx@lists.osr.com [mailto:xxxxx@lists.osr.com] On Behalf Of xxxxx@gmail.com
Sent: Thursday, June 2, 2016 9:57 AM
To: Windows System Software Devs Interest List
Subject: [ntdev] KMDF event handler equivalent of DRIVER_STARTIO routine in WDM

Hello,

Is there an equivalent event handler in KMDF to the DRIVER_STARTIO routine in WDM? I have a DRIVER_STARTIO routine in a WDM driver, which I am porting to KMDF and I would like to port this code to a framework based driver. IRP_MJ_Xxx requests are a straightforward translation to KMDF event handlers, however I am having difficulty finding the equivalent event handler(s) for the WDM DRIVER_STARTIO routine.

I appreciate any help.

Thank You Very Much,
Earl

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4

Oh ok, thank you for the reply.

I have implemented a serial queue for IRPs (read, write, ioctl), Pnp, Power. However, since this is not the default queue, it had not occurred to me to set up a default queue and send any requests that are not an IRP to an EvtIoDefault handler to handle all other device IOCTL dispatches.

5

There is no WDFQUEUE support for pnp or power.

d

-----Original Message-----
From: xxxxx@lists.osr.com [mailto:xxxxx@lists.osr.com] On Behalf Of xxxxx@gmail.com
Sent: Thursday, June 2, 2016 10:52 AM
To: Windows System Software Devs Interest List
Subject: RE:[ntdev] KMDF event handler equivalent of DRIVER_STARTIO routine in WDM

Oh ok, thank you for the reply.

I have implemented a serial queue for IRPs (read, write, ioctl), Pnp, Power. However, since this is not the default queue, it had not occurred to me to set up a default queue and send any requests that are not an IRP to an EvtIoDefault handler to handle all other device IOCTL dispatches.

—
NTDEV is sponsored by OSR

Visit the list online at: http:

MONTHLY seminars on crash dump analysis, WDF, Windows internals and software drivers!
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6

I apologize. I misspoke, I am only using a WDFQUEUE for read, write, and ioctl. Pnp and power are simply setup and configured in EvtDeviceAdd, not under WDFQUEUE support. But I appreciate the help in using WDFQUEUE to translate the StartIo routine.