netdev - Re: [net] Octeontx2-pf: Fix Backpresure configuration

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Message-ID: <20250617112750.GG5000@horms.kernel.org>
Date: Tue, 17 Jun 2025 12:27:50 +0100
From: Simon Horman <horms@...nel.org>
To: Hariprasad Kelam <hkelam@...vell.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Sunil Goutham <sgoutham@...vell.com>,
	Geetha sowjanya <gakula@...vell.com>,
	Subbaraya Sundeep <sbhatta@...vell.com>,
	Bharat Bhushan <bbhushan2@...vell.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Subject: Re: [net] Octeontx2-pf: Fix Backpresure configuration

On Tue, Jun 17, 2025 at 12:04:02PM +0530, Hariprasad Kelam wrote:
> NIX block can receive packets from multiple links such as
> MAC (RPM), LBK and CPT.
> 
>        -----------------
>  RPM --|     NIX       |
>        -----------------
>              |
>              |
>             LBK
> 
> Each link supports multiple channels for example RPM link supports
> 16 channels. In case of link oversubsribe, NIX will assert backpressure
> on receive channels.
> 
> The previous patch considered a single channel per link, resulting in
> backpressure not being enabled on the remaining channels
> 
> Fixes: a7ef63dbd588 ("octeontx2-af: Disable backpressure between CPT and NIX")
> Signed-off-by: Hariprasad Kelam <hkelam@...vell.com>

Reviewed-by: Simon Horman <horms@...nel.org>