netdev - Re: [PATCH net-next 01/11] devlink: add macro for "drv.spec"

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Date:   Wed, 18 Mar 2020 09:51:29 +0530
From:   Vasundhara Volam <vasundhara-v.volam@...adcom.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     David Miller <davem@...emloft.net>,
        Netdev <netdev@...r.kernel.org>, Jiri Pirko <jiri@...lanox.com>,
        Michael Chan <michael.chan@...adcom.com>,
        Jacob Keller <jacob.e.keller@...el.com>
Subject: Re: [PATCH net-next 01/11] devlink: add macro for "drv.spec"

On Tue, Mar 17, 2020 at 11:10 PM Jakub Kicinski <kuba@...nel.org> wrote:
>
> On Tue, 17 Mar 2020 20:44:38 +0530 Vasundhara Volam wrote:
> > Add definition and documentation for the new generic info "drv.spec".
> > "drv.spec" specifies the version of the software interfaces between
> > driver and firmware.
> >
> > Cc: Jiri Pirko <jiri@...lanox.com>
> > Signed-off-by: Vasundhara Volam <vasundhara-v.volam@...adcom.com>
> > Signed-off-by: Michael Chan <michael.chan@...adcom.com>
> > ---
> >  Documentation/networking/devlink/devlink-info.rst | 6 ++++++
> >  include/net/devlink.h                             | 3 +++
> >  2 files changed, 9 insertions(+)
> >
> > diff --git a/Documentation/networking/devlink/devlink-info.rst b/Documentation/networking/devlink/devlink-info.rst
> > index 70981dd..0765a48 100644
> > --- a/Documentation/networking/devlink/devlink-info.rst
> > +++ b/Documentation/networking/devlink/devlink-info.rst
> > @@ -59,6 +59,12 @@ board.manufacture
> >
> >  An identifier of the company or the facility which produced the part.
> >
> > +drv.spec
> > +--------
> > +
> > +Firmware interface specification version of the software interfaces between
>
> Why did you call this "drv" if the first sentence of the description
> says it's a property of the firmware?
Since it is a version of interface between driver and firmware. Both
driver and firmware
can support different versions. I intend to display the version
implemented in the driver.

I can probably add for both driver and firmware. Add it is as drv.spec
and fw.spec.

Thanks,
Vasundhara
>
> Upcoming Intel patches call this "fw.mgmt.api". Please use that name,
> it makes far more sense.
>
> > +driver and firmware. This tag displays spec version implemented by driver.
> > +
> >  fw
> >  --
> >
> > diff --git a/include/net/devlink.h b/include/net/devlink.h
> > index c9ca86b..9c4d889 100644
> > --- a/include/net/devlink.h
> > +++ b/include/net/devlink.h
> > @@ -476,6 +476,9 @@ enum devlink_param_generic_id {
> >  /* Revision of asic design */
> >  #define DEVLINK_INFO_VERSION_GENERIC_ASIC_REV        "asic.rev"
> >
> > +/* FW interface specification version implemented by driver */
> > +#define DEVLINK_INFO_VERSION_GENERIC_DRV_SPEC        "drv.spec"
> > +
> >  /* Overall FW version */
> >  #define DEVLINK_INFO_VERSION_GENERIC_FW              "fw"
> >  /* Control processor FW version */
>