Re: PCI userland access non-mmap APIs, kernel access to legacy space

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

> But adding read/write is fine with me.  In fact, having read/write hooks 
> for the memory backed resource files is also nice, since it makes 
> dealing with them on the command line a bit easier.

Plan is to use iomap so I get both IO and MMIO for (almost) free :-)

> > Also, while at it, I would like to introduce a pair of in-kernel
> > interfaces:
> 
> What's the other half of the pair?

Heh, indeed, there is none, I initially had a separate function for mem
and for io and at the last minute though "ugh, let's just use a struct
resource !" :-)

> Yeah, sounds like a good additional abstraction for that interface.  
> Should make porting it to other arches easier (I talked with kyle about 
> this last week, so maybe this'll give him motivation to do it for 
> parisc).

Ok, good. I'll do some code asap.

Ben.