netdev - Re: [PATCH] ice: Add get/set hw address for VF representor ports

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Date: Wed, 31 Jan 2024 13:00:04 +0100
From: Jiri Pirko <jiri@...nulli.us>
To: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
Cc: karthiksundaravel <ksundara@...hat.com>, jesse.brandeburg@...el.com,
	anthony.l.nguyen@...el.com, davem@...emloft.net,
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
	intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, rjarry@...hat.com,
	aharivel@...hat.com, vchundur@...hat.com, cfontain@...hat.com
Subject: Re: [PATCH] ice: Add get/set hw address for VF representor ports

Wed, Jan 31, 2024 at 11:43:44AM CET, michal.swiatkowski@...ux.intel.com wrote:
>On Wed, Jan 31, 2024 at 01:38:47PM +0530, karthiksundaravel wrote:
>> Changing the mac address of the VF representor ports are not
>> available via devlink. Add the function handlers to set and get
>> the HW address for the VF representor ports.
>> 
>> Signed-off-by: karthiksundaravel <ksundara@...hat.com>
>> ---
>>  drivers/net/ethernet/intel/ice/ice_devlink.c | 134 ++++++++++++++++++-
>>  1 file changed, 132 insertions(+), 2 deletions(-)
>> 
>> diff --git a/drivers/net/ethernet/intel/ice/ice_devlink.c b/drivers/net/ethernet/intel/ice/ice_devlink.c
>> index 80dc5445b50d..56d81836c469 100644
>> --- a/drivers/net/ethernet/intel/ice/ice_devlink.c
>> +++ b/drivers/net/ethernet/intel/ice/ice_devlink.c
>> @@ -9,6 +9,8 @@
>
>As Jiri already wrote, you are not changing MAC of VF in your code. Try
>to look at ice_set_vf_mac in ice_sriov.c. In current implementation you
>nedd to set new MAC value for VF and reset it. You shouldn't use PF VSI.
>
>Pointer to VF you can get from representor struct (through parent VSI).

What if it is in a different host? Would you still be able to change the
mac?


>
>You shouldn't manage the rules during MAC changing, as in switchdev
>slow-path there shouldn't be VF MAC rules. It can be problematic as user
>already can have MAC + sth rule (which also needs to be change). I will
>leave it to user (most probably the MAC change happens before adding any
>rules).

Rules are on the representor, not the VF, correct? Seems unrelated to
me.


>
>In few days we will send patchset for subfunction support where the
>subfunction MAC chaning is implementing from devlink API. I will add you
>to the CC.
>
>Thanks for working on it, it is a gap in our solution.
>
>Thanks,
>Michal
>