netdev - Re: [PATCH v3 net-next 07/13] octeontx2-af: Add debugfs entry to dump the MCAM rules

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Date:   Thu, 12 Nov 2020 11:48:00 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     Naveen Mamindlapalli <naveenm@...vell.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     kuba@...nel.org, davem@...emloft.net, sgoutham@...vell.com,
        lcherian@...vell.com, gakula@...vell.com, jerinj@...vell.com,
        sbhatta@...vell.com, hkelam@...vell.com
Subject: Re: [PATCH v3 net-next 07/13] octeontx2-af: Add debugfs entry to
 dump the MCAM rules

On Wed, 2020-11-11 at 12:43 +0530, Naveen Mamindlapalli wrote:
> From: Subbaraya Sundeep <sbhatta@...vell.com>
> 
> Add debugfs support to dump the MCAM rules installed using
> NPC_INSTALL_FLOW mbox message. Debugfs file can display mcam
> entry, counter if any, flow type and counter hits.
> 
> Ethtool will dump the ntuple flows related to the PF only.
> The debugfs file gives systemwide view of the MCAM rules
> installed by all the PF's.
> 
> Below is the example output when the debugfs file is read:
> ~ # mount -t debugfs none /sys/kernel/debug
> ~ # cat /sys/kernel/debug/octeontx2/npc/mcam_rules
> 
> 	Installed by: PF1
> 	direction: RX
>         mcam entry: 227
> 	udp source port 23 mask 0xffff
> 	Forward to: PF1 VF0
>         action: Direct to queue 0
> 	enabled: yes
>         counter: 1
>         hits: 0
> 

I don't want to block this series or anything, but you might want to
use devlink dpipe interface for this:

https://www.kernel.org/doc/html/latest/networking/devlink/devlink-dpipe.html

As a future patch of course.

Thanks,
Saeed.