netdev - Re: [PATCH iwl-next] ice: Implement ethtool reset support

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Message-ID: <21ed191b-2814-49bb-8722-413f62fbc938@intel.com>
Date: Wed, 31 Jul 2024 14:08:20 +0200
From: Wojciech Drewek <wojciech.drewek@...el.com>
To: Jakub Kicinski <kuba@...nel.org>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
	"simon.horman@...igine.com" <simon.horman@...igine.com>, "Nguyen, Anthony L"
	<anthony.l.nguyen@...el.com>, "edumazet@...gle.com" <edumazet@...gle.com>,
	"pabeni@...hat.com" <pabeni@...hat.com>
Subject: Re: [PATCH iwl-next] ice: Implement ethtool reset support

On 30.07.2024 15:58, Jakub Kicinski wrote:
> On Tue, 30 Jul 2024 12:51:21 +0200 Wojciech Drewek wrote:
>> ETH_RESET_MAC - ICE_RESET_CORER
> 
> Core doesn't really sound like MAC, what is it?
> And does PF reset reset mostly PCIe side or more?
> My knee jerk mapping would be to map Core to dedicated
> and PF to DMA.
> 

Quick summary our reset types:
PF reset reinitialize the resources/data path for PF and its VFs.
It has no impact on other PF/VFs.
Core Reset reinitialize all functions and shared parts of the
device except PHY/MAC units, EMP and PCI Interface.
Global Reset is Core Reset + PHY/MAC units reset (including External PHY)
Because Global Reset is a extended Core it makes sense to map it to all.
PF reset mapping makes sense to me since it is dedicated to a single physical function.