[dpdk-dev] [PATCH] net/mlx5: fix Tx queues creation type check for scheduling

[Raslan Darawsheh]

Hi,

> -----Original Message-----
> From: Slava Ovsiienko <viacheslavo at nvidia.com>
> Sent: Thursday, July 29, 2021 3:27 PM
> To: dev at dpdk.org
> Cc: Raslan Darawsheh <rasland at nvidia.com>; Matan Azrad
> <matan at nvidia.com>; stable at dpdk.org
> Subject: [PATCH] net/mlx5: fix Tx queues creation type check for scheduling
> 
> The send scheduling on timestamp offload requires the Send
> Queue (SQ) shares its User Access Region (UAR) with the
> pacing Clock Queue. The SQ can be created by mlx5 PMD either
> with DevX or with Verbs. If the SQ is being created with
> DevX the dedicated UAR can be specified and all the SQs
> share the single UAR. Once SQ is being created with Verbs
> the SQ's UAR is allocated by the rdma-core library internally
> on its own and there are no UAR sharing. This caused hardware
> errors on WAIT WQEs and overall send scheduling malfunction.
> 
> If SQs are going to be created with Verbs and the send
> scheduling offload is explicitly requested via tx_pp devarg
> the device probing is rejected as device configuration
> can't satisfy the requirements.
> 
> Fixes: 3ec73abeed52 ("net/mlx5/linux: fix Tx queue operations decision")
> Fixes: 8f848f32fc24 ("net/mlx5: introduce send scheduling devargs")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Viacheslav Ovsiienko <viacheslavo at nvidia.com>

Patch applied to next-net-mlx,

Kindest regards,
Raslan Darawsheh