linux-kernel - Re: [PATCH 2/2] fpga: add FPGA manager debugfs

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Message-ID: <CANk1AXTOKKVdVDEkQ5d73F3nzgDDK9jgm2gRPpXbNM5A4aNS1w@mail.gmail.com>
Date:   Thu, 16 Aug 2018 09:25:35 -0500
From:   Alan Tull <atull@...nel.org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Moritz Fischer <mdf@...nel.org>, Jonathan Corbet <corbet@....net>,
        Dinh Nguyen <dinguyen@...nel.org>,
        Appana Durga Kedareswara Rao <appanad@...inx.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-fpga@...r.kernel.org,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        Alan Tull <atull@...nsource.altera.com>,
        Matthew Gerlach <matthew.gerlach@...ux.intel.com>
Subject: Re: [PATCH 2/2] fpga: add FPGA manager debugfs

On Wed, Aug 15, 2018 at 5:34 PM, Randy Dunlap <rdunlap@...radead.org> wrote:

Hi Randy,

> On 08/15/2018 03:09 PM, Alan Tull wrote:
>> From: Alan Tull <atull@...nsource.altera.com>
>>
>> Implement DebugFS for the FPGA Manager Framework for
>> debugging and developmental use.
>>
>> Enabled by CONFIG_FPGA_MGR_DEBUG_FS
>
> Hi Alan,
>
> for your v2 changes:
>
>> Each FPGA gets its own directory such as
>>  <debugfs>/fpga_manager/fpga0 and three files:
>
> s/three/four/

Yes

>
>>
>>  * [RW] flags          = flags as defined in fpga-mgr.h
>>  * [RW] firmware_name  = write/read back name of FPGA image
>>                          firmware file to program
>>  * [WO] image          = write-only file for directly writing
>>                          fpga image w/o firmware layer
>>  * [RW] config_complete_timeout_us = maximum for the FPGA to
>>                          go to the operating state after
>>                        programming
>>
>> The debugfs is implemented in a separate fpga_mgr_debugfs.c
>
>       debugfs interface is

Yes

>
>> file, but the FPGA manager core is still built as one
>> module.  Note the name change from fpga-mgr.ko to fpga_mgr.ko.
>>
>> Signed-off-by: Alan Tull <atull@...nel.org>
>> Signed-off-by: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
>> ---
>>  drivers/fpga/Kconfig            |   7 ++
>>  drivers/fpga/Makefile           |   4 +-
>>  drivers/fpga/fpga-mgr-debugfs.c | 221 ++++++++++++++++++++++++++++++++++++++++
>>  drivers/fpga/fpga-mgr-debugfs.h |  22 ++++
>>  drivers/fpga/fpga-mgr.c         |   8 ++
>>  include/linux/fpga/fpga-mgr.h   |   3 +
>>  6 files changed, 264 insertions(+), 1 deletion(-)
>>  create mode 100644 drivers/fpga/fpga-mgr-debugfs.c
>>  create mode 100644 drivers/fpga/fpga-mgr-debugfs.h
>>
>> diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
>> index 1ebcef4..600924d 100644
>> --- a/drivers/fpga/Kconfig
>> +++ b/drivers/fpga/Kconfig
>> @@ -9,6 +9,13 @@ menuconfig FPGA
>>         kernel.  The FPGA framework adds a FPGA manager class and FPGA
>>         manager drivers.
>>
>> +config FPGA_MGR_DEBUG_FS
>> +       bool "FPGA Manager DebugFS"
>> +       depends on FPGA && DEBUG_FS
>> +       help
>> +         Say Y here if you want to expose a DebugFS interface for the
>> +      FPGA Manager Framework.
>
> Use tab indentation for bool, depends, and help lines.
>
> Use tab +2 spaces for help text.

Yes, thanks for catching that.  I'll fix these in v2.

Thanks for the review!

Alan

>
>> +
>>  if FPGA
>>
>>  config FPGA_MGR_SOCFPGA
>
> thanks,
> --
> ~Randy