Re: [RFC 7/8] fpga-region: add sysfs interface

From: Moritz Fischer <moritz.fischer@ettus.com>
To: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: matthew.gerlach@linux.intel.com,
	Alan Tull <delicious.quinoa@gmail.com>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	linux-fpga@vger.kernel.org
Subject: Re: [RFC 7/8] fpga-region: add sysfs interface
Date: Wed, 15 Feb 2017 13:36:16 -0800	[thread overview]
Message-ID: <CAAtXAHev7VdUNeHbBEfRu-3oVMXvhkL2wKBFw1JUefaMTsWE+g@mail.gmail.com> (raw)
In-Reply-To: <20170215211528.GA9125@obsidianresearch.com>

Jason,

On Wed, Feb 15, 2017 at 1:15 PM, Jason Gunthorpe
<jgunthorpe@obsidianresearch.com> wrote:
> On Wed, Feb 15, 2017 at 12:54:27PM -0800, Moritz Fischer wrote:
>
>> Well I don't know ;-) With something fdt based we already have
>> parsers there,
>
> Not sure.. How does incbin work in DTB?
>
> We have the FPGA in a s/g list so we cannot pass the entire file to
> libfdt - is that consistent with incbin?

Well you could attach the (for lack of better word) blob to the beginning,
instead of doing incbin

> Can we force a specific alignment for the included data?

I'd say probably, but haven't checked.

> How complex will the userspace tool be to make the image?

Userspace can be as complex as it needs to be, imho, if it makes
kernel space easier & safer.

I'll need to do some more reading over the weekend before I can make
more sensible comments :)

Thanks,

Moritz