netdev - Re: [PATCH RFC net-next 2/4] net: phylink: add EEE management

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date: Tue, 13 Jun 2023 15:10:56 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>
Cc: Heiner Kallweit <hkallweit1@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Marcin Wojtas <mw@...ihalf.com>,
	netdev@...r.kernel.org, Paolo Abeni <pabeni@...hat.com>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH RFC net-next 2/4] net: phylink: add EEE management

On Tue, Jun 13, 2023 at 02:26:22PM +0200, Andrew Lunn wrote:
> > I'm wondering if, rather than adding a bit to mac_capabilities, whether
> > instead:
> > 
> > 1) add eee_capabilities and re-use the existing MAC_CAP_* definitions
> >    to indicate what speeds the MAC supports LPI. This doesn't seem to
> >    solve (c).
> > 2) add a phy interface bitmap indicating which interface modes support
> >    LPI generation.
> > 
> > Phylib already has similar with its supported_eee link mode bitmap,
> > which presumably MACs can knock out link modes that they know they
> > wouldn't support.
> 
> O.K, I can probably make that work. None of the MAC drivers i've
> looked at need this flexibility yet, but we can add it now.
> 
> I do however wounder if it should be called lpi_capabilities, not
> eee_capabilities. These patches are all about making the core deal
> with 99% of EEE. All the MAC driver needs to do is enable/disable
> sending LPI and set the timer value. So we are really talking about
> the MACs LPI capabilities.

No problem with calling it lpi_capabilities.

Thanks!

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!