netdev - Re: [PATCH mlx5-next 2/5] net/mlx5: Expose mlx5_sriov_blocking_notifier

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Message-ID: <20220504135557.GF49344@nvidia.com>
Date:   Wed, 4 May 2022 10:55:57 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Yishai Hadas <yishaih@...dia.com>
Cc:     alex.williamson@...hat.com, saeedm@...dia.com, kvm@...r.kernel.org,
        netdev@...r.kernel.org, kuba@...nel.org, leonro@...dia.com,
        maorg@...dia.com, cohuck@...hat.com
Subject: Re: [PATCH mlx5-next 2/5] net/mlx5: Expose
 mlx5_sriov_blocking_notifier_register /  unregister APIs

On Wed, Apr 27, 2022 at 12:31:17PM +0300, Yishai Hadas wrote:
> Expose mlx5_sriov_blocking_notifier_register / unregister APIs to let a
> VF register to be notified for its enablement / disablement by the PF.
> 
> Upon VF probe it will call mlx5_sriov_blocking_notifier_register() with
> its notifier block and upon VF remove it will call
> mlx5_sriov_blocking_notifier_unregister() to drop its registration.
> 
> This can give a VF the ability to clean some resources upon disable
> before that the command interface goes down and on the other hand sets
> some stuff before that it's enabled.
> 
> This may be used by a VF which is migration capable in few cases.(e.g.
> PF load/unload upon an health recovery).
> 
> Signed-off-by: Yishai Hadas <yishaih@...dia.com>
> Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
> ---
>  .../net/ethernet/mellanox/mlx5/core/sriov.c   | 65 ++++++++++++++++++-
>  include/linux/mlx5/driver.h                   | 12 ++++
>  2 files changed, 76 insertions(+), 1 deletion(-)

This patch needs to be first and be on the mlx5 shared branch
 
Jason