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Message-Id: <1182215871.26853.302.camel@localhost.localdomain>
Date: Tue, 19 Jun 2007 11:17:51 +1000
From: Benjamin Herrenschmidt <benh@...nel.crashing.org>
To: Jesse Barnes <jesse.barnes@...el.com>
Cc: linux-pci@...ey.karlin.mff.cuni.cz,
Linux Kernel list <linux-kernel@...r.kernel.org>,
Matthew Wilcox <matthew@....cx>, Greg KH <greg@...ah.com>,
Ian Romanick <idr@...ibm.com>, Jeff Garzik <jgarzik@...ox.com>,
Kyle McMartin <kyle@...artin.ca>
Subject: Re: PCI userland access non-mmap APIs, kernel access to legacy
space
> 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.
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