linux-kernel - Re: [PATCH net-next v6 3/6] net: bcmasp: Add support for ASP2.0 Ethernet controller

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Message-ID: <20230602235859.79042ff0@kernel.org>
Date:   Fri, 2 Jun 2023 23:58:59 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Justin Chen <justin.chen@...adcom.com>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        bcm-kernel-feedback-list@...adcom.com,
        florian.fainelli@...adcom.com, davem@...emloft.net,
        edumazet@...gle.com, pabeni@...hat.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        opendmb@...il.com, andrew@...n.ch, hkallweit1@...il.com,
        linux@...linux.org.uk, richardcochran@...il.com,
        sumit.semwal@...aro.org, christian.koenig@....com,
        simon.horman@...igine.com
Subject: Re: [PATCH net-next v6 3/6] net: bcmasp: Add support for ASP2.0
 Ethernet controller

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

> +	/* UniMAC RSV counters */
> +	STAT_BCMASP_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
> +	STAT_BCMASP_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
> +	STAT_BCMASP_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
> +	STAT_BCMASP_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
> +	STAT_BCMASP_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
> +	STAT_BCMASP_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
> +	STAT_BCMASP_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
> +	STAT_BCMASP_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
> +	STAT_BCMASP_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
> +	STAT_BCMASP_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),

these should also be removed, and you should implement @get_rmon_stats.

> +	STAT_BCMASP_MIB_RX("rx_pkts", mib.rx.pkt),
> +	STAT_BCMASP_MIB_RX("rx_bytes", mib.rx.bytes),
> +	STAT_BCMASP_MIB_RX("rx_multicast", mib.rx.mca),
> +	STAT_BCMASP_MIB_RX("rx_broadcast", mib.rx.bca),
> +	STAT_BCMASP_MIB_RX("rx_fcs", mib.rx.fcs),

there's a FCS error statistic in the standard stats, no need to
duplicate

> +	STAT_BCMASP_MIB_RX("rx_control", mib.rx.cf),
> +	STAT_BCMASP_MIB_RX("rx_pause", mib.rx.pf),

@get_pause_stats

> +	STAT_BCMASP_MIB_RX("rx_unknown", mib.rx.uo),
> +	STAT_BCMASP_MIB_RX("rx_align", mib.rx.aln),
> +	STAT_BCMASP_MIB_RX("rx_outrange", mib.rx.flr),
> +	STAT_BCMASP_MIB_RX("rx_code", mib.rx.cde),
> +	STAT_BCMASP_MIB_RX("rx_carrier", mib.rx.fcr),
> +	STAT_BCMASP_MIB_RX("rx_oversize", mib.rx.ovr),
> +	STAT_BCMASP_MIB_RX("rx_jabber", mib.rx.jbr),

these look like candidates from standard stats, too.
Please read thru:

https://docs.kernel.org/next/networking/statistics.html

> +	STAT_BCMASP_MIB_RX("rx_mtu_err", mib.rx.mtue),
> +	STAT_BCMASP_MIB_RX("rx_good_pkts", mib.rx.pok),
> +	STAT_BCMASP_MIB_RX("rx_unicast", mib.rx.uc),
> +	STAT_BCMASP_MIB_RX("rx_ppp", mib.rx.ppp),
> +	STAT_BCMASP_MIB_RX("rx_crc", mib.rx.rcrc),

hm, what's the difference between rx_crc and rx_fcs ?