linux-kernel - Re: [PATCH 11/16] fpga: intel: fme: add partial reconfiguration sub feature support

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Message-ID: <CANk1AXTi_o+VbV=+XezoMHE2kEx86vDPp=RiPuHUWOkWaQctnA@mail.gmail.com>
Date:   Thu, 30 Mar 2017 15:30:11 -0500
From:   Alan Tull <atull@...nel.org>
To:     Wu Hao <hao.wu@...el.com>
Cc:     Moritz Fischer <moritz.fischer@...us.com>,
        linux-fpga@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        luwei.kang@...el.com, yi.z.zhang@...el.com,
        Tim Whisonant <tim.whisonant@...el.com>,
        Enno Luebbers <enno.luebbers@...el.com>,
        Shiva Rao <shiva.rao@...el.com>,
        Christopher Rauer <christopher.rauer@...el.com>,
        Alan Tull <alan.tull@...el.com>,
        Xiao Guangrong <guangrong.xiao@...ux.intel.com>
Subject: Re: [PATCH 11/16] fpga: intel: fme: add partial reconfiguration sub
 feature support

On Thu, Mar 30, 2017 at 7:08 AM, Wu Hao <hao.wu@...el.com> wrote:
> From: Kang Luwei <luwei.kang@...el.com>
>
> Partial Reconfiguration (PR) is the most important function for FME. It
> allows reconfiguration for given Port/Accelerated Function Unit (AFU).
>
> This patch adds support for PR sub feature. In this patch, it registers
> a fpga_mgr and implements fpga_manager_ops, and invoke fpga_mgr_buf_load
> for PR operation once PR request received via ioctl. Below user space
> interfaces are exposed by this sub feature.
>
> Sysfs interface:
> * /sys/class/fpga/<fpga.x>/<intel-fpga-fme.x>/interface_id
>   Read-only. Indicate the hardware interface information. Userspace
>   applications need to check this interface to select correct green
>   bitstream format before PR.
>
> Ioctl interface:
> * FPGA_FME_PORT_PR
>   Do partial reconfiguration per information from userspace, including
>   target port(AFU), buffer size and address info. It returns the PR status
>   (PR error code if failed) to userspace.
>
> Signed-off-by: Tim Whisonant <tim.whisonant@...el.com>
> Signed-off-by: Enno Luebbers <enno.luebbers@...el.com>
> Signed-off-by: Shiva Rao <shiva.rao@...el.com>
> Signed-off-by: Christopher Rauer <christopher.rauer@...el.com>
> Signed-off-by: Alan Tull <alan.tull@...el.com>

Hi Wu Hao,

Thanks for submitting your patches.

I think there's been a misunderstanding of the meaning of
'Signed-off-by' [1].  I have not signed off on this code or had a hand
in its development.  But I'm happy to get to review it now.  It will
take a bit of time; I expect to be replying next week.

Alan Tull
[1] linux/Documentation/process/5.Posting.rst

> Signed-off-by: Kang Luwei <luwei.kang@...el.com>
> Signed-off-by: Xiao Guangrong <guangrong.xiao@...ux.intel.com>
> Signed-off-by: Wu Hao <hao.wu@...el.com>