linux-kernel - Re: [PATCHv4 net-next 2/3] octeontx2-af: Add devlink health reporters for NPA

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Date:   Mon, 23 Nov 2020 02:49:06 +0000
From:   George Cherian <gcherian@...vell.com>
To:     Jiri Pirko <jiri@...nulli.us>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        Sunil Kovvuri Goutham <sgoutham@...vell.com>,
        "Linu Cherian" <lcherian@...vell.com>,
        Geethasowjanya Akula <gakula@...vell.com>,
        "masahiroy@...nel.org" <masahiroy@...nel.org>,
        "willemdebruijn.kernel@...il.com" <willemdebruijn.kernel@...il.com>,
        "saeed@...nel.org" <saeed@...nel.org>
Subject: Re: [PATCHv4 net-next 2/3] octeontx2-af: Add devlink health reporters
 for NPA



> -----Original Message-----
> From: Jiri Pirko <jiri@...nulli.us>
> Sent: Saturday, November 21, 2020 7:44 PM
> To: George Cherian <gcherian@...vell.com>
> Cc: netdev@...r.kernel.org; linux-kernel@...r.kernel.org;
> kuba@...nel.org; davem@...emloft.net; Sunil Kovvuri Goutham
> <sgoutham@...vell.com>; Linu Cherian <lcherian@...vell.com>;
> Geethasowjanya Akula <gakula@...vell.com>; masahiroy@...nel.org;
> willemdebruijn.kernel@...il.com; saeed@...nel.org
> Subject: Re: [PATCHv4 net-next 2/3] octeontx2-af: Add devlink health
> reporters for NPA
> 
> Sat, Nov 21, 2020 at 05:02:00AM CET, george.cherian@...vell.com wrote:
> >Add health reporters for RVU NPA block.
> >NPA Health reporters handle following HW event groups
> > - GENERAL events
> > - ERROR events
> > - RAS events
> > - RVU event
> >An event counter per event is maintained in SW.
> >
> >Output:
> > # devlink health
> > pci/0002:01:00.0:
> >   reporter npa
> >     state healthy error 0 recover 0
> > # devlink  health dump show pci/0002:01:00.0 reporter npa
> > NPA_AF_GENERAL:
> >        Unmap PF Error: 0
> >        Free Disabled for NIX0 RX: 0
> >        Free Disabled for NIX0 TX: 0
> >        Free Disabled for NIX1 RX: 0
> >        Free Disabled for NIX1 TX: 0
> 
> This is for 2 ports if I'm not mistaken. Then you need to have this reporter
> per-port. Register ports and have reporter for each.
> 
No, these are not port specific reports.
NIX is the Network Interface Controller co-processor block.
There are (max of) 2 such co-processor blocks per SoC.

Moreover, this is an NPA (Network Pool/Buffer Allocator co- processor) reporter.
This tells whether a free or alloc operation is skipped due to the configurations set by
other co-processor blocks (NIX,SSO,TIM etc).

https://www.kernel.org/doc/html/latest/networking/device_drivers/ethernet/marvell/octeontx2.html
> NAK.