linux-kernel - RE: [PATCH v2] uio: dfl: add HSSI feature id

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Date:   Tue, 19 Apr 2022 08:25:10 +0000
From:   "Zhang, Tianfei" <tianfei.zhang@...el.com>
To:     "Wu, Hao" <hao.wu@...el.com>, "trix@...hat.com" <trix@...hat.com>,
        "mdf@...nel.org" <mdf@...nel.org>,
        "Xu, Yilun" <yilun.xu@...el.com>,
        "linux-fpga@...r.kernel.org" <linux-fpga@...r.kernel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Matthew Gerlach" <matthew.gerlach@...ux.intel.com>
Subject: RE: [PATCH v2] uio: dfl: add HSSI feature id



> > -----Original Message-----
> > From: Zhang, Tianfei <tianfei.zhang@...el.com>
> > Sent: Tuesday, April 12, 2022 2:24 PM
> > To: Wu, Hao <hao.wu@...el.com>; trix@...hat.com; mdf@...nel.org; Xu,
> > Yilun <yilun.xu@...el.com>; linux-fpga@...r.kernel.org;
> > gregkh@...uxfoundation.org
> > Cc: linux-kernel@...r.kernel.org; Matthew Gerlach
> > <matthew.gerlach@...ux.intel.com>; Zhang, Tianfei
> > <tianfei.zhang@...el.com>
> > Subject: [PATCH v2] uio: dfl: add HSSI feature id
> >
> > From: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
> >
> > Add the feature id of the OFS HSSI (High Speed Serial Interface)
> 
> We still don't see any description on what OFS is here, or will OFS be added to
> title as well? we don't expect another submission with the same title but for XXX
> HSSI again.

This name of HSSI module in dfl feature id table is : OFS HSSI subsystem.

How about this tile:
uio: dfl: add OFS HSSI device id

Add OFS HSSI (Open FPGA Stack High Speed Serial Interface) device ID in uio_dfl driver for Intel PAC N6000 Card.

> 
> > subsystem to table of ids supported by the uio_dfl driver. HSSI
> > subsystem consists of harden/soft Ethernet MAC to support various
> > ethernet usages and PCS/FEC/PMA direct modes for non-ethernet usages.
> >
> > We leverage the uio_dfl driver to access the HSSI subsystem on user
> > space, because the HSSI subsystem was designed for specific purposes
> > and does not fit into the standard MAC and net kernel subsystems.
> >
> > The Feature ID table of DFL can be found:
> > https://github.com/OPAE/dfl-feature-id
> 
> Why you put it here? even this link there is no more descriptions to understand
> what it is. Or can be removed here.

Yes, I agree, I will remove it.
> 
> >
> > Signed-off-by: Matthew Gerlach <matthew.gerlach@...ux.intel.com>
> > Signed-off-by: Tianfei Zhang <tianfei.zhang@...el.com>
> > ---
> > 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..660e1d0bf6b9 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_OFS_HSSI		0x15
> >
> >  static const struct dfl_device_id uio_dfl_ids[] = {
> >  	{ FME_ID, FME_FEATURE_ID_ETH_GROUP },
> > +	{ FME_ID, FME_FEATURE_ID_OFS_HSSI },
> >  	{ }
> >  };
> >  MODULE_DEVICE_TABLE(dfl, uio_dfl_ids);
> > --
> > 2.26.2