linux-kernel - Re: [PATCH V2] net: mhi : Add support to enable ethernet interface

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Message-ID: <CAGRyCJH0PZpR9fD=GmWzzkHuu8f+tBhg6hE+Y9pYyv+sQAd_YQ@mail.gmail.com>
Date:   Wed, 19 Jul 2023 13:17:10 +0200
From:   Daniele Palmas <dnlplm@...il.com>
To:     Vivek Pernamitta <quic_vpernami@...cinc.com>
Cc:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        mhi@...ts.linux.dev, mrana@...cinc.com, quic_qianyu@...cinc.com,
        quic_vbadigan@...cinc.com, quic_krichai@...cinc.com,
        quic_skananth@...cinc.com, linux-arm-msm@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "open list:NETWORKING DRIVERS" <netdev@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2] net: mhi : Add support to enable ethernet interface

Hello Vivek,

Il giorno mer 19 lug 2023 alle ore 12:39 Vivek Pernamitta
<quic_vpernami@...cinc.com> ha scritto:
>
>
> Currently MHI NET driver does not support Ethernet interface,
>
> we are adding Ethernet interface support to MHI NET driver, so new
> client can be configured to be Ethernet type over MHI by setting
> "mhi_device_info.ethernet_if = true"
>

how can this be set to "true"?

Is this something that can be changed dynamically at runtime (but I
can't see how currently) or is it "static" ?

In the latter case, not sure if the maintainer agrees, but maybe a new
binding (e.g. something like ETH_SW0) should be used ?

Thanks,
Daniele

> currently we are not changing mhi_swip0/mhi_hwip0 to Ethernet. we are
> adding an provision to configure mhi client as  Ethernet type.
>
>
> On 7/18/2023 6:13 PM, Manivannan Sadhasivam wrote:
> > On Tue, Jul 18, 2023 at 11:45:28AM +0530, Vivek Pernamitta wrote:
> >> Add support to enable ethernet interface for MHI SWIP channels.
> >>
> > Please add more info in the commit message i.e., why this interface is added and
> > how it is going to benefit the users etc..
> >
> > Since you are modifying the existing mhi_swip interface, this isn't an ABI
> > change?
> >
> >> Signed-off-by: Vivek Pernamitta <quic_vpernami@...cinc.com>
> >> Reviewed-by: Daniele Palmas <dnlplm@...il.com>
> >> Reviewed-by: Simon Horman <simon.horman@...igine.com>
> >> ---
> >>
> >> changes since v1:
> >>      - Moved to net-next from linux-next
> >>      - moved to eth_hw_addr_random() to assign Ethernet MAC address
> >>        from eth_random_addr()
> >> ---
> >>   drivers/net/mhi_net.c | 53 ++++++++++++++++++++++++++++++++++++++-------------
> >>   1 file changed, 40 insertions(+), 13 deletions(-)
> >>
> >> diff --git a/drivers/net/mhi_net.c b/drivers/net/mhi_net.c
> >> index 3d322ac..5bb8d99 100644
> >> --- a/drivers/net/mhi_net.c
> >> +++ b/drivers/net/mhi_net.c
> > [...]
> >
> >> @@ -380,10 +405,12 @@ static void mhi_net_remove(struct mhi_device *mhi_dev)
> >>
> >>   static const struct mhi_device_info mhi_hwip0 = {
> >>      .netname = "mhi_hwip%d",
> >> +    .ethernet_if = false,
> >>   };
> >>
> >>   static const struct mhi_device_info mhi_swip0 = {
> >>      .netname = "mhi_swip%d",
> >> +    .ethernet_if = false,
> > false?
> yes ,it is false as by default mhi_swip/mhi_hwip interface will be
> normal net device.
> >
> > - Mani
> >
> >>   };
> >>
> >>   static const struct mhi_device_id mhi_net_id_table[] = {
> >> --
> >> 2.7.4
> >>
>