I am currently writing a driver for a PCI device which exposes 3 memory
regions of sizes 256bytes, 16Mb and 32Mb. I am unable to access anything
beyond 11Mb in the third region; I can read data, but I know for a fact that
it is not correct. Moreover, when I try to add a second card to the system,
I cannot ioremap() any outher big region (ioremap fails altogether).
Does anyone know:
1- if there is a size limit on mapped regions?
2- if there is a limit on how many (big) regions can be mapped?
3- Are there any drivers out there that successfully remap regions that big?
4- is there a workaround?
5- any tips on debugging these kins of problems?
thank you
p.s. Could CC any answer?
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