[PATCH v4 07/15] vdpa/mlx5: optimize datapath-control synchronization

[Maxime Coquelin]

On 6/18/22 11:02, Li Zhang wrote:
> The driver used a single global lock for any synchronization
> needed for the datapath and control path.
> It is better to group the critical sections with
> the other ones that should be synchronized.
> 
> Replace the global lock with the following locks:
> 
> 1.virtq locks(per virtq) synchronize datapath polling and
>    parallel configurations on the same virtq.
> 2.A doorbell lock synchronizes doorbell update,
>    which is shared for all the virtqs in the device.
> 3.A steering lock for the shared steering objects updates.
> 
> Signed-off-by: Li Zhang <lizh at nvidia.com>
> Acked-by: Matan Azrad <matan at nvidia.com>
> ---
>   drivers/vdpa/mlx5/mlx5_vdpa.c       | 24 ++++---
>   drivers/vdpa/mlx5/mlx5_vdpa.h       | 13 ++--
>   drivers/vdpa/mlx5/mlx5_vdpa_event.c | 97 ++++++++++++++++++-----------
>   drivers/vdpa/mlx5/mlx5_vdpa_lm.c    | 36 ++++++++---
>   drivers/vdpa/mlx5/mlx5_vdpa_steer.c |  7 ++-
>   drivers/vdpa/mlx5/mlx5_vdpa_virtq.c | 88 +++++++++++++++++++-------
>   6 files changed, 186 insertions(+), 79 deletions(-)
> 

Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>

Thanks,
Maxime