Re: [PATCH net-next V2 08/10] net/mlx5e: Use multiple CQ doorbells

[Simon Horman]

On Tue, Sep 16, 2025 at 05:11:42PM +0300, Tariq Toukan wrote:
> From: Cosmin Ratiu <cratiu@xxxxxxxxxx>
> 
> Channel doorbells are now also used by all channel CQs.
> 
> A new 'uar' parameter is added to 'struct mlx5e_create_cq_param',
> which is then used in mlx5e_alloc_cq.
> 
> A single UAR page has two TX doorbells and a single CQ doorbell, so
> every consecutive pair of 'struct mlx5_sq_bfreg' (TX doorbells)
> uses the same underlying 'struct mlx5_uars_page' (CQ doorbell).
> So by using c->bfreg->up, CQs from every consecutive channel pair will
> share the same CQ doorbell.
> 
> Non-channel associated CQs keep using the global CQ doorbell.
> 
> Signed-off-by: Cosmin Ratiu <cratiu@xxxxxxxxxx>
> Reviewed-by: Dragos Tatulea <dtatulea@xxxxxxxxxx>
> Signed-off-by: Tariq Toukan <tariqt@xxxxxxxxxx>

Reviewed-by: Simon Horman <horms@xxxxxxxxxx>