RE: [PATCH v3] uio: dfl: add HSSI subsystem feature id

From: "Wu, Hao" <hao.wu@intel.com>
To: "Xu, Yilun" <yilun.xu@intel.com>, Tom Rix <trix@redhat.com>
Cc: "Zhang, Tianfei" <tianfei.zhang@intel.com>,
	"mdf@kernel.org" <mdf@kernel.org>,
	"linux-fpga@vger.kernel.org" <linux-fpga@vger.kernel.org>,
	"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"Matthew Gerlach" <matthew.gerlach@linux.intel.com>
Subject: RE: [PATCH v3] uio: dfl: add HSSI subsystem feature id
Date: Thu, 5 May 2022 06:22:52 +0000	[thread overview]
Message-ID: <DM6PR11MB3819577AF82DE95DDF12DE2D85C29@DM6PR11MB3819.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20220430165847.GD398931@yilunxu-OptiPlex-7050>

> 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@linux.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.
> 

Yes, it's better that people can find that in Documentation instead of some
commit message. That's another patch from Tianfei.

Thanks
Hao

> Thanks,
> Yilun
> 
> >
> > Tom
> >
> > >
> > > Hao has some comments about this at
> > >
> > >
> https://lore.kernel.org/all/DM6PR11MB38190E6EEF6DE3EB900290C585F39@D
> M6PR11MB3819.namprd11.prod.outlook.com/
> > >
> > > > Otherwise fine.
> > > >
> > > > Reviewed-by: Tom Rix <trix@redhat.com>
> > > >
> > > > > Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com>
> > > > > Signed-off-by: Tianfei Zhang <tianfei.zhang@intel.com>
> > > This patch is now good to me.
> > >
> > > Acked-by: Xu Yilun <yilun.xu@intel.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);