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From: Wayne on 27 Apr 2010 02:47
Hi there,

I am implementing crash dump feature of storport virtual miniport driver. My
storport virtual miniport driver service the disk child device enumerated by
my bus driver. It needs an interface, a data structure pointer including some
routines and context, from bus driver to deal with I/O. In normal mode, I
send a query interface to bus driver to get that pointer, works fine. But in
dump mode, I have no idea of how to do that because IRQL is too high.

WDK document tell me that I can use
MINIPORT_DUMP_POINTERS->MiniportPrivateDumpData to store some context which
will be passed to PORT_CONFIGURATION_INFORMATION->Reserved member. The fact
is that whatever I fill in MiniportPrivateDumpData, I always get a invalid
pointer like 6D756400 in FindAdapter routine of crash dump mode. Some guys
told me that crash dump feature of Storport Virtual Miniport is supported in
some commercial product. Not sure if they this approach.

So my question is how can I get that interface pointer from my bus driver in
crash dump mode of my Stortport Virtual Miniport driver?

Some guys maybe read this thread from ntdev list, sorry for that.

--
thanks
wayne
From: Pavel A. on 27 Apr 2010 07:31
What if your bus driver exports this data to your miniport _before_ crash
occurs?
-- pa


"Wayne" <wayne.gong(a)oracle.com> wrote in message
news:1AC29C04-3781-4C2D-9DA6-92FFE0E7043E(a)microsoft.com...
> Hi there,
>
> I am implementing crash dump feature of storport virtual miniport driver.
> My
> storport virtual miniport driver service the disk child device enumerated
> by
> my bus driver. It needs an interface, a data structure pointer including
> some
> routines and context, from bus driver to deal with I/O. In normal mode, I
> send a query interface to bus driver to get that pointer, works fine. But
> in
> dump mode, I have no idea of how to do that because IRQL is too high.
>
> WDK document tell me that I can use
> MINIPORT_DUMP_POINTERS->MiniportPrivateDumpData to store some context
> which
> will be passed to PORT_CONFIGURATION_INFORMATION->Reserved member. The
> fact
> is that whatever I fill in MiniportPrivateDumpData, I always get a invalid
> pointer like 6D756400 in FindAdapter routine of crash dump mode. Some guys
> told me that crash dump feature of Storport Virtual Miniport is supported
> in
> some commercial product. Not sure if they this approach.
>
> So my question is how can I get that interface pointer from my bus driver
> in
> crash dump mode of my Stortport Virtual Miniport driver?
>
> Some guys maybe read this thread from ntdev list, sorry for that.
>
> --
> thanks
> wayne

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