netdev - RE: [Intel-wired-lan] [PATCH iwl-net v1 1/4] ixgbevf: fix getting link speed data for E610 devices

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Message-ID: <IA3PR11MB8985D1684444D046266572DE8F11A@IA3PR11MB8985.namprd11.prod.outlook.com>
Date: Fri, 19 Sep 2025 08:15:06 +0000
From: "Romanowski, Rafal" <rafal.romanowski@...el.com>
To: "Jagielski, Jedrzej" <jedrzej.jagielski@...el.com>,
	"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
CC: "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>, "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>, "stable@...r.kernel.org" <stable@...r.kernel.org>,
	"Jagielski, Jedrzej" <jedrzej.jagielski@...el.com>, "Kitszel, Przemyslaw"
	<przemyslaw.kitszel@...el.com>, "Loktionov, Aleksandr"
	<aleksandr.loktionov@...el.com>
Subject: RE: [Intel-wired-lan] [PATCH iwl-net v1 1/4] ixgbevf: fix getting
 link speed data for E610 devices

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of
> Jedrzej Jagielski
> Sent: Thursday, August 28, 2025 11:52 AM
> To: intel-wired-lan@...ts.osuosl.org
> Cc: Nguyen, Anthony L <anthony.l.nguyen@...el.com>;
> netdev@...r.kernel.org; stable@...r.kernel.org; Jagielski, Jedrzej
> <jedrzej.jagielski@...el.com>; Kitszel, Przemyslaw
> <przemyslaw.kitszel@...el.com>; Loktionov, Aleksandr
> <aleksandr.loktionov@...el.com>
> Subject: [Intel-wired-lan] [PATCH iwl-net v1 1/4] ixgbevf: fix getting link speed
> data for E610 devices
> 
> E610 adapters no longer use the VFLINKS register to read PF's link speed and
> linkup state. As a result VF driver cannot get actual link state and it incorrectly
> reports 10G which is the default option.
> It leads to a situation where even 1G adapters print 10G as actual link speed.
> The same happens when PF driver set speed different than 10G.
> 
> Add new mailbox operation to let the VF driver request a PF driver to provide
> actual link data. Update the mailbox api to v1.6.
> 
> Incorporate both ways of getting link status within the legacy
> ixgbe_check_mac_link_vf() function.
> 
> Fixes: 4c44b450c69b ("ixgbevf: Add support for Intel(R) E610 device")
> Co-developed-by: Andrzej Wilczynski <andrzejx.wilczynski@...el.com>
> Signed-off-by: Andrzej Wilczynski <andrzejx.wilczynski@...el.com>
> Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@...el.com>
> Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@...el.com>
> Cc: stable@...r.kernel.org
> Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@...el.com>
> ---
>  drivers/net/ethernet/intel/ixgbevf/defines.h  |   1 +
>  .../net/ethernet/intel/ixgbevf/ixgbevf_main.c |   6 +-
>  drivers/net/ethernet/intel/ixgbevf/mbx.h      |   4 +
>  drivers/net/ethernet/intel/ixgbevf/vf.c       | 137 ++++++++++++++----
>  4 files changed, 116 insertions(+), 32 deletions(-)
> 
> diff --git a/drivers/net/ethernet/intel/ixgbevf/defines.h
> b/drivers/net/ethernet/intel/ixgbevf/defines.h
> index a9bc96f6399d..e177d1d58696 100644
> --- a/drivers/net/ethernet/intel/ixgbevf/defines.h
> +++ b/drivers/net/ethernet/intel/ixgbevf/defines.h
> @@ -28,6 +28,7 @@


Tested-by: Rafal Romanowski <rafal.romanowski@...el.com>