linux-kernel - Re: [PATCH v3] fpga manager: Add Altera CvP driver

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Message-ID: <20170420194715.0ff0ccf1@crub>
Date:   Thu, 20 Apr 2017 19:47:15 +0200
From:   Anatolij Gustschin <agust@...x.de>
To:     matthew.gerlach@...ux.intel.com
Cc:     linux-fpga@...r.kernel.org,
        Alan Tull <atull@...nsource.altera.com>,
        Yi Li <yi1.li@...ux.intel.com>,
        Moritz Fischer <moritz.fischer@...us.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] fpga manager: Add Altera CvP driver

Hi Matthew,

On Thu, 20 Apr 2017 10:29:34 -0700 (PDT)
matthew.gerlach@...ux.intel.com matthew.gerlach@...ux.intel.com wrote:
...
>Since you say the driver works with Arria-10, I thought I would give it 
>a try with the Altera Arria10 PCIe DevKit I am using.  I successfully
>compiled your patch as an out of tree module against a 3.10 kernel.  The 
>module successfully loaded and created instances for both boards in the 
>host.

thanks for testing!

>Now that I have the driver instances running, I'm not sure howto actually 
>perform CvP.  Do you use a debugfs interface or something else?  Do you 
>use the sof or an rbf file?

I used the debugfs interface for first testing, now I'm using custom
fpga config interface driver, but it depends on many other drivers
and won't work without additional special hardware.

I use an rbf file. The v2 patch [1] used a module parameter to specify
firmware file name for a given PCIe device, but it is bypassing the
framework and is not acceptable for mainline.

Thanks,
Anatolij

[1] https://patchwork.kernel.org/patch/9582731