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Message-ID: <8601be87-4bcb-8e6b-5124-1c63150c7c40@broadcom.com>
Date:   Tue, 6 Jun 2023 18:35:51 -0700
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Subject: Re: [PATCH net-next v6 3/6] net: bcmasp: Add support for ASP2.0
 Ethernet controller
To:     Jakub Kicinski <kuba@kernel.org>
Cc:     netdev@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
        bcm-kernel-feedback-list@broadcom.com,
        florian.fainelli@broadcom.com, davem@davemloft.net,
        edumazet@google.com, pabeni@redhat.com, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org,
        opendmb@gmail.com, andrew@lunn.ch, hkallweit1@gmail.com,
        linux@armlinux.org.uk, richardcochran@gmail.com,
        sumit.semwal@linaro.org, christian.koenig@amd.com,
        simon.horman@corigine.com
References: <1685657551-38291-1-git-send-email-justin.chen@broadcom.com>
 <1685657551-38291-4-git-send-email-justin.chen@broadcom.com>
 <20230602235859.79042ff0@kernel.org>
 <956dc20f-386c-f4fe-b827-1a749ee8af02@broadcom.com>
 <20230606171605.3c20ae79@kernel.org>
From:   Justin Chen <justin.chen@broadcom.com>
In-Reply-To: <20230606171605.3c20ae79@kernel.org>
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On 6/6/2023 5:16 PM, Jakub Kicinski wrote:
> On Tue, 6 Jun 2023 15:58:21 -0700 Justin Chen wrote:
>> On 6/2/23 11:58 PM, Jakub Kicinski wrote:
>>> On Thu,  1 Jun 2023 15:12:28 -0700 Justin Chen wrote:
>>>> +	/* general stats */
>>>> +	STAT_NETDEV(rx_packets),
>>>> +	STAT_NETDEV(tx_packets),
>>>> +	STAT_NETDEV(rx_bytes),
>>>> +	STAT_NETDEV(tx_bytes),
>>>> +	STAT_NETDEV(rx_errors),
>>>> +	STAT_NETDEV(tx_errors),
>>>> +	STAT_NETDEV(rx_dropped),
>>>> +	STAT_NETDEV(tx_dropped),
>>>> +	STAT_NETDEV(multicast),
>>>
>>> please don't report standard interface stats in ethtool -S
>>>    
>>
>> These are not netdev statistics but MAC block counters. Guess it is not
>> clear with the naming here, will fix this. We have a use case where the
>> MAC traffic may be redirected from the associated net dev, so the
>> counters may not be the same.
> 
> You seem to be dumping straight from the stats member of struct
> net_device:
> 
> +		if (s->type == BCMASP_STAT_NETDEV)
> +			p = (char *)&dev->stats;
> 
> No?
> 

Woops I got it mixed up. Yes these stats are redundant. What I was 
describing is
+	STAT_BCMASP_MIB_RX("rx_pkts", mib.rx.pkt),
and equivalent.

> Also - can you describe how you can have multiple netdevs for
> the same MAC?

Not netdevs per se, but packets can be redirected to an offload 
co-processor.

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