netdev - Re: [net-next v2 11/11] i40e: Introduce recovery mode support

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Date:   Sat, 04 May 2019 18:23:06 -0700
From:   Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Alice Michael <alice.michael@...el.com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org, nhorman@...hat.com,
        sassmann@...hat.com, Piotr Marczak <piotr.marczak@...el.com>,
        Don Buchholz <donald.buchholz@...el.com>
Subject: Re: [net-next v2 11/11] i40e: Introduce recovery mode support

On Sat, 2019-05-04 at 07:35 -0400, Jakub Kicinski wrote:
> On Fri,  3 May 2019 16:09:39 -0700, Jeff Kirsher wrote:
> > From: Alice Michael <alice.michael@...el.com>
> > 
> > This patch introduces "recovery mode" to the i40e driver. It is
> > part of a new Any2Any idea of upgrading the firmware. In this
> > approach, it is required for the driver to have support for
> > "transition firmware", that is used for migrating from structured
> > to flat firmware image. In this new, very basic mode, i40e driver
> > must be able to handle particular IOCTL calls from the NVM Update
> > Tool and run a small set of AQ commands.
> 
> What's the "particular IOCTL" you speak of?  This patch adds a fake
> netdev with a .set_eeprom callback.  Are you wrapping the AQ commands
> in the set_eeprom now?  Or is there some other IOCTL here?
> 
> Let me repeat my other question - can the netdev you spawn in
> i40e_init_recovery_mode() pass traffic?
> 
> > These additional AQ commands are part of the interface used by
> > the NVMUpdate tool.  The NVMUpdate tool contains all of the
> > necessary logic to reference these new AQ commands.  The end user
> > experience remains the same, they are using the NVMUpdate tool to
> > update the NVM contents.
> 
> IOW to update FW users still need your special tool, but they can use
> ethtool -f to.. change the app-specific (DPDK) parser profiles?  Joy :)
> 
> > Signed-off-by: Alice Michael <alice.michael@...el.com>
> > Signed-off-by: Piotr Marczak <piotr.marczak@...el.com>
> > Tested-by: Don Buchholz <donald.buchholz@...el.com>
> > Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>

I will see if I can get either the author or one of our tools developers
respond to your questions while I am on vacation (all next week).  If not,
I will respond in a week.  Sorry in advance, if you have to wait for a week
for a response.

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