- Building a chained MDL
- Posted by alex on June 6th, 2008
Hi,
I would like to make a DMA transfer to two non contiguous buffers in non
paged memory. As far as I understand I have to create a MDL chain to
represent the two buffers, but looking at IoAllocateMdl() documentation
for SecondaryBuffer parameter it always refers to an IRP. But I haven't
got any IRP, I'm building the MDL myself. Is it possible to build a
chained MDL without having an IRP? If the answer is yes which routines
should I use?
Bye
Alex
- Posted by Doron Holan [MSFT] on June 6th, 2008
you build the chained MDL by hand by pointing the Mdl->Next field to the
next MDL in the chain. how you allocate the MDL and initialize it is up to
you as well
d
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- Posted by Maxim S. Shatskih on June 6th, 2008
Build 2 MDLs, then link them manually using ->Next field.
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