linux-kernel - Re: [RFC PATCH v1] fpga manager framework with configfs interface

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Date:	Wed, 25 Jun 2014 11:54:17 -0700
From:	Philip Balister <philip@...ister.org>
To:	"H. Peter Anvin" <hpa@...or.com>,
	Alan Tull <delicious.quinoa@...il.com>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
CC:	Pantelis Antoniou <pantelis.antoniou@...sulko.com>,
	Joel Becker <jlbec@...lplan.org>, Pavel Machek <pavel@...x.de>,
	Alan Tull <atull@...era.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Michal Simek <monstr@...str.eu>,
	Michal Simek <michal.simek@...inx.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Mark Brown <broonie@...nel.org>,
	Alessandro Rubini <rubini@...dd.com>,
	Steffen Trumtrar <s.trumtrar@...gutronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	Kyle Teske <kyle.teske@...com>,
	Josh Cartwright <joshc@....teric.us>,
	Nicolas Pitre <nico@...aro.org>, Felipe Balbi <balbi@...com>,
	Mauro Carvalho Chehab <m.chehab@...sung.com>,
	David Brown <davidb@...eaurora.org>,
	Rob Landley <rob@...dley.net>,
	"David S. Miller" <davem@...emloft.net>,
	Joe Perches <joe@...ches.com>,
	Cesar Eduardo Barros <cesarb@...arb.net>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dinh Nguyen <dinguyen@...era.com>,
	Yves Vandervennet <rocket.yvanderv@...il.com>
Subject: Re: [RFC PATCH v1] fpga manager framework with configfs interface

On 06/25/2014 11:43 AM, H. Peter Anvin wrote:
> On 06/25/2014 11:37 AM, Alan Tull wrote:
>>
>> Yes, that's why I've recently felt more love for the firmware
>> interface.  Since I need resume, it gives me a straightforward path to
>> be able to reprogram the FPGA without holding ram for the bitfile.
>> Also it is scalable.
>>
> 
> The firmware interface is definitely pretty much ideal for the
> "production driver" use case... after all, the fact that the firmware
> happens to be an FPGA is to some degree an implementation detail (well,
> modulo fun things like showing up on the bus with one device ID and then
> disconnecting and reconnecting with another device ID after firmware load.)
> 
> There are *so* many use cases for FPGA bitstreams...

Agreed!

Philip


> 
> 	-hpa
> 
> 
> 
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