Re: [dpdk-dev] [PATCH v2 10/13] vdpa/mlx5: map doorbell

[Maxime Coquelin]

On 1/29/20 11:09 AM, Matan Azrad wrote:
> The HW supports only 4 bytes doorbell writing detection.
> The virtio device set only 2 bytes when it rings the doorbell.
> 
> Map the virtio doorbell detected by the virtio queue kickfd to the HW
> VAR space when it expects to get the virtio emulation doorbell.
> 
> Use the EAL interrupt mechanism to get notification when a new event
> appears in kickfd by the guest and write 4 bytes to the HW doorbell space
> in the notification callback.
> 
> Signed-off-by: Matan Azrad <ma...@mellanox.com>
> Acked-by: Viacheslav Ovsiienko <viachesl...@mellanox.com>
> ---
>  drivers/vdpa/mlx5/mlx5_vdpa.h       |  3 ++
>  drivers/vdpa/mlx5/mlx5_vdpa_virtq.c | 82 
> ++++++++++++++++++++++++++++++++++++-
>  2 files changed, 84 insertions(+), 1 deletion(-)

Acked-by: Maxime Coquelin <maxime.coque...@redhat.com>

Thanks,
Maxime