Updated URL for sample audio driver. http://code.msdn.microsoft.com/windowshardware/slate-system-virtual-audio-f241062f Girish On Wed, Dec 18, 2013 at 2:39 PM, Girish Pattabiraman < girish.pattabiraman@xxxxxxxxx> wrote: > You can definitely use KMDF APIs within a WDM driver. > This has been showcased in the latest sample Audio driver "sysvad" > published along with the WDK for windows 8.1. > > Samples can be downloaded here: > http://code.msdn.microsoft.com/windowshardware/Windows-8-Driver-Samples-5e1aa62e > > Regards, > Girish > > > On Wed, Dec 18, 2013 at 1:06 PM, Tim Roberts <timr@xxxxxxxxx> wrote: > >> maraboina suneeth wrote: >> > >> > I work on audio miniport drivers which need to talk to a KMDF based >> > driver. When I tried to use WDM based APIs to send IOCTL it never >> > seems to be working. But when I tried to use KMDF APIs then everything >> > was working fine but I'm not sure if its a good design to use KMDF >> > APIsinside a WDM based drivers. I would appreciate if someone could >> > answer what are the drawbacks/repercussions of this approach. >> >> Your question doesn't make sense. First, all of the KMDF APIs >> eventually call WDM APIs. KMDF only works within your driver: all >> inter-driver communication is done through WDM. Second, you can't use >> ANY KMDF APIs inside a WDM driver. >> >> Why don't you show us some of your WDM code, and we'll take a look? >> This kind of problem is often caused by calling IoCallDriver with the >> wrong device object. In a miniport, it can sometimes be tricky to >> figure out which device object to use. >> >> -- >> Tim Roberts, timr@xxxxxxxxx >> Providenza & Boekelheide, Inc. >> >> ****************** >> >> WDMAUDIODEV addresses: >> Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx >> Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe >> Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx >> ?subject=unsubscribe >> Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx >> >> URL to WDMAUDIODEV page: >> http://www.wdmaudiodev.com/ >> >> > > > -- > "Motive of LIFE: It is not death that I wish to avoid but life which I > wish to live." - Ayn Rand > -- "Motive of LIFE: It is not death that I wish to avoid but life which I wish to live." - Ayn Rand