linux-kernel - Re: [PATCH v2 net-next 01/14] qed: convert link mode from u32 to bitmap

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Message-ID: <20200720092306.355-1-alobakin@marvell.com>
Date:   Mon, 20 Jul 2020 12:23:06 +0300
From:   Alexander Lobakin <alobakin@...vell.com>
To:     Andrew Lunn <andrew@...n.ch>
CC:     Alexander Lobakin <alobakin@...vell.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Igor Russkikh <irusskikh@...vell.com>,
        Michal Kalderon <michal.kalderon@...vell.com>,
        "Ariel Elior" <aelior@...vell.com>,
        Denis Bolotin <denis.bolotin@...vell.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        <GR-everest-linux-l2@...vell.com>,
        <QLogic-Storage-Upstream@...vell.com>, <netdev@...r.kernel.org>,
        <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 net-next 01/14] qed: convert link mode from u32 to bitmap

Date: Sun, 19 Jul 2020 23:21:00 +0200
From: Andrew Lunn <andrew@...n.ch>

> On Sun, Jul 19, 2020 at 11:14:40PM +0300, Alexander Lobakin wrote:
>> Currently qed driver already ran out of 32 bits to store link modes,
>> and this doesn't allow to add and support more speeds.
>> Convert link mode to bitmap that will always have enough space for
>> any number of speeds and modes.
>
> Hi Alexander

Hi Andrew!

> Why not just throw away all these QED_LM_ defines and use the kernel
> link modes? The fact you are changing the u32 to a bitmap suggests the
> hardware does not use them.

I've just double-checked, and you're right, management firmware operates
with NVM_* definitions, while QED_LM_* are used only in QED and QEDE to
fill Ethtool link settings.
I didn't notice this while working on the series, but it would be really
a lot better to just use generic definitions.
So I'll send v3 soon.

>      Andrew

Thanks,
Al