[dpdk-dev] [PATCH] net/mlx5: fix aging queue doorbell ringing

[Raslan Darawsheh]

Hi,

> -----Original Message-----
> From: dev <dev-bounces at dpdk.org> On Behalf Of Dekel Peled
> Sent: Tuesday, November 3, 2020 12:38 PM
> To: Slava Ovsiienko <viacheslavo at nvidia.com>; Shahaf Shuler
> <shahafs at nvidia.com>; Matan Azrad <matan at nvidia.com>
> Cc: dev at dpdk.org
> Subject: [dpdk-dev] [PATCH] net/mlx5: fix aging queue doorbell ringing
> 
> Recent patch introduced a new SQ for ASO flow hit management.
> This SQ uses two WQEBB's for each WQE.
> The SQ producer index is 16 bits wide.
> 
> The enqueue loop posts new WQEs to the ASO SQ, using WQE index for
> the SQ management.
> This 16 bits index multiplied by 2 was wrongly used also for SQ
> doorbell ringing.
> The multiplication caused the SW index overlapping to be out of sync
> with the hardware index, causing it to get stuck.
> 
> This patch separates the WQE index management from the doorbell index
> management.
> So, for each WQE index incrementation by 1, the doorbell index is
> incremented by 2.
> 
> Fixes: 18c88cf29c29 ("net/mlx5: support flow hit action for aging")
> 
> Signed-off-by: Dekel Peled <dekelp at nvidia.com>
> Acked-by: Matan Azrad <matan at nvidia.com>
> ---
>  drivers/common/mlx5/mlx5_prm.h   | 21 +++++++++++++------
>  drivers/net/mlx5/mlx5.h          |  3 ++-
>  drivers/net/mlx5/mlx5_flow_age.c | 36 ++++++++++++++++++--------------
>  3 files changed, 37 insertions(+), 23 deletions(-)
> 

Patch applied to next-net-mlx,

Kindest regards,
Raslan Darawsheh