[PATCH 1/2] wifi: ath11k: implement custom wake_tx_queue with flow control

[Jose Ignacio Tornos Martinez]

Hi Zhi-Jun,


> While you are reworking it would you mind looking at the previous attempt?
>
> It tried to follow the behaviour in ath10k but lacks throttling mechanism.
>
> https://lore.kernel.org/linux-wireless/20230501130725.7171-1-quic_tamizhr@quicinc.com/

Thanks for the pointer. 

I have looked at Tamizh's patch and the main difference with this approach
is that the ring free space check is done before dequeuing, so the skb is
never consumed when the ring is full. This avoids frame drops and the
-ENOMEM errors we were seeing.

I think no additional push mechanism from TX completions is needed since
wake_tx_queue is called frequently enough under traffic to resume dequeuing
when ring space becomes available.

Best regards,
Jose Ignacio