Specific code for device- kernel mem mapping

Question

I would like to see an example of device memory to kernel memory mapping code.
Yes, there is a section in WDD about memory mapping, but it is geared towards device<->USER-memory mapping.
or kernel<-> user-memory mapping.
Could someone please point me towards a specific example of doing device<->kernelspace memory mapping?

Answer 1

I would like to see an example of device memory to
kernel memory mapping code.[CUT]
Could someone please point me towards a specific
example of doing device<->kernelspace memory
mapping?look at the ddi_regs_map_setup(9F) man page. Devices have register
blocks. Assuming this is a PCI card, the pci config registers will be
rnumber=0, device specific registers are usually rnumber=1,
and some device have more after that (i.e. if they have on board memory,
it could be mapped in rnumber=1 or rnumber=2 or even have
a way to access it through config space.
MRJ