linux-kernel - Re: [PATCH v3] uio: dfl: add HSSI subsystem feature id

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Message-ID: <20220430165847.GD398931@yilunxu-OptiPlex-7050>
Date:   Sun, 1 May 2022 00:58:47 +0800
From:   Xu Yilun <yilun.xu@...el.com>
To:     Tom Rix <trix@...hat.com>
Cc:     Tianfei Zhang <tianfei.zhang@...el.com>, hao.wu@...el.com,
        mdf@...nel.org, linux-fpga@...r.kernel.org,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        Matthew Gerlach <matthew.gerlach@...ux.intel.com>
Subject: Re: [PATCH v3] uio: dfl: add HSSI subsystem feature id

On Sat, Apr 30, 2022 at 07:54:57AM -0700, Tom Rix wrote:
> 
> On 4/30/22 7:24 AM, Xu Yilun wrote:
> > On Fri, Apr 29, 2022 at 05:23:53AM -0700, Tom Rix wrote:
> > > On 4/28/22 5:57 PM, Tianfei Zhang wrote:
> > > > From: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
> > > > 
> > > > Add the Device Feature List (DFL) feature id for the
> > > > High Speed Serial Interface (HSSI) Subsystem to the
> > > > table of ids supported by the uio_dfl driver.
> > > > 
> > > > The HSSI Subsystem is a configurable set of IP blocks
> > > > to be used as part of a Ethernet or PCS/FEC/PMA pipeline.
> > > > Like the Ethernet group used by the N3000 card, the HSSI
> > > > Subsystem does not fully implement a network device from
> > > > a Linux netdev perspective and is controlled and monitored
> > > > from user space software via the uio interface.
> > > Generally you should include the url for the dfl definitions.
> > > 
> > > Can you add it here to the commit log ?
> > Do you refer to this url, https://github.com/OPAE/dfl-feature-id ?
> 
> Yes, exactly.
> 
> To someone not working the day-to-day working dfl they will have no clue
> where the fids come from.
> 
> When a new one is added to the kernel, it should have a listing in
> dfl-feature-id repo.
> 
> If it doesn't, there will be a future conflict.

I remember a recent patch records the url in Documentation/fpga/dfl.rst.
Anyway I'm OK with or without the url in commit message.

Thanks,
Yilun

> 
> Tom
> 
> > 
> > Hao has some comments about this at
> > 
> >    https://lore.kernel.org/all/DM6PR11MB38190E6EEF6DE3EB900290C585F39@DM6PR11MB3819.namprd11.prod.outlook.com/
> > 
> > > Otherwise fine.
> > > 
> > > Reviewed-by: Tom Rix <trix@...hat.com>
> > > 
> > > > Signed-off-by: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
> > > > Signed-off-by: Tianfei Zhang <tianfei.zhang@...el.com>
> > This patch is now good to me.
> > 
> > Acked-by: Xu Yilun <yilun.xu@...el.com>
> > 
> > > > ---
> > > > v3: change the name of this feature id to HSSI_SUBSYS and rewrite
> > > >       the git message.
> > > > v2: add HSSI introduction and the git repo of Feature ID table.
> > > > ---
> > > >    drivers/uio/uio_dfl.c | 2 ++
> > > >    1 file changed, 2 insertions(+)
> > > > 
> > > > diff --git a/drivers/uio/uio_dfl.c b/drivers/uio/uio_dfl.c
> > > > index 89c0fc7b0cbc..8f39cc8bb034 100644
> > > > --- a/drivers/uio/uio_dfl.c
> > > > +++ b/drivers/uio/uio_dfl.c
> > > > @@ -45,9 +45,11 @@ static int uio_dfl_probe(struct dfl_device *ddev)
> > > >    }
> > > >    #define FME_FEATURE_ID_ETH_GROUP	0x10
> > > > +#define FME_FEATURE_ID_HSSI_SUBSYS	0x15
> > > >    static const struct dfl_device_id uio_dfl_ids[] = {
> > > >    	{ FME_ID, FME_FEATURE_ID_ETH_GROUP },
> > > > +	{ FME_ID, FME_FEATURE_ID_HSSI_SUBSYS },
> > > >    	{ }
> > > >    };
> > > >    MODULE_DEVICE_TABLE(dfl, uio_dfl_ids);