netdev - RE: [Intel-wired-lan] [PATCH v2 intel-net 1/2] ice: add ndo

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Message-ID: <DM6PR11MB3292CA01DB8F9EF78A704DFEF13C9@DM6PR11MB3292.namprd11.prod.outlook.com>
Date:   Thu, 3 Jun 2021 04:15:08 +0000
From:   "Bhandare, KiranX" <kiranx.bhandare@...el.com>
To:     "Fijalkowski, Maciej" <maciej.fijalkowski@...el.com>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        "bjorn@...nel.org" <bjorn@...nel.org>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "Karlsson, Magnus" <magnus.karlsson@...el.com>
Subject: RE: [Intel-wired-lan] [PATCH v2 intel-net 1/2] ice: add ndo_bpf
 callback for safe mode netdev ops

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of
> Maciej Fijalkowski
> Sent: Thursday, May 20, 2021 12:05 PM
> To: intel-wired-lan@...ts.osuosl.org
> Cc: netdev@...r.kernel.org; Jamal Hadi Salim <jhs@...atatu.com>;
> bjorn@...nel.org; kuba@...nel.org; bpf@...r.kernel.org;
> davem@...emloft.net; Karlsson, Magnus <magnus.karlsson@...el.com>
> Subject: [Intel-wired-lan] [PATCH v2 intel-net 1/2] ice: add ndo_bpf callback
> for safe mode netdev ops
> 
> ice driver requires a programmable pipeline firmware package in order to
> have a support for advanced features. Otherwise, driver falls back to so
> called 'safe mode'. For that mode, ndo_bpf callback is not exposed and when
> user tries to load XDP program, the following happens:
> 
> $ sudo ./xdp1 enp179s0f1
> libbpf: Kernel error message: Underlying driver does not support XDP in
> native mode link set xdp fd failed
> 
> which is sort of confusing, as there is a native XDP support, but not in the
> current mode. Improve the user experience by providing the specific
> ndo_bpf callback dedicated for safe mode which will make use of extack to
> explicitly let the user know that the DDP package is missing and that's the
> reason that the XDP can't be loaded onto interface currently.
> 
> Cc: Jamal Hadi Salim <jhs@...atatu.com>
> Fixes: efc2214b6047 ("ice: Add support for XDP")
> Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
> ---
>  drivers/net/ethernet/intel/ice/ice_main.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 

Tested-by: Kiran Bhandare <kiranx.bhandare@...el.com>  A Contingent Worker at Intel