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

[Tom Rix]

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@xxxxxxxxxxxxxxx>
> > >
> > > 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.

Tom

> Hao has some comments about this at
>
>    https://lore.kernel.org/all/DM6PR11MB38190E6EEF6DE3EB900290C585F39@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/
>
> > Otherwise fine.
> >
> > Reviewed-by: Tom Rix <trix@xxxxxxxxxx>
> >
> > > Signed-off-by: Matthew Gerlach <matthew.gerlach@xxxxxxxxxxxxxxx>
> > > Signed-off-by: Tianfei Zhang <tianfei.zhang@xxxxxxxxx>
> This patch is now good to me.
>
> Acked-by: Xu Yilun <yilun.xu@xxxxxxxxx>
>
> > > ---
> > > 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);