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 12:34:57 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     George Cherian <gcherian@...vell.com>
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

Mon, Nov 23, 2020 at 11:28:28AM CET, gcherian@...vell.com wrote:
>Hi Jiri,
>
>> -----Original Message-----
>> From: Jiri Pirko <jiri@...nulli.us>
>> Sent: Monday, November 23, 2020 3:52 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
>> 
>> Mon, Nov 23, 2020 at 03:49:06AM CET, gcherian@...vell.com wrote:
>> >
>> >
>> >> -----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.
>> 
>> Ah. I see. In that case, could you please structure the json differently. Don't
>> concatenate the number with the string. Instead of that, please have 2
>> subtrees, one for each NIX.
>> 
>NPA_AF_GENERAL:
>        Unmap PF Error: 0
>        Free Disabled for NIX0 
>		RX: 0
>       		TX: 0
>        Free Disabled for NIX1
>		RX: 0
>        		TX: 0
>
>Something like this?

It should be 2 member array, use devlink_fmsg_arr_pair_nest_start()
NIX {
0: {free disabled TX: 0, free disabled RX: 0,}
1: {free disabled TX: 0, free disabled RX: 0,}
}

something like this.


>
>Regards,
>-George
>> 
>> >
>> >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://urldefense.proofpoint.com/v2/url?u=https-
>> 3A__www.kernel.org_doc
>> >_html_latest_networking_device-
>> 5Fdrivers_ethernet_marvell_octeontx2.htm
>> >l&d=DwIBAg&c=nKjWec2b6R0mOyPaz7xtfQ&r=npgTSgHrUSLmXpBZJKVhk0
>> lE_XNvtVDl8
>> >ZA2zBvBqPw&m=FNPm6lB8fRvGYvMqQWer6S9WI6rZIlMmDCqbM8xrnxM
>> &s=B47zBTfDlIdM
>> >xUmK0hmQkuoZnsGZYSzkvbZUloevT0A&e=
>> >> NAK.
>