linux-kernel - Re: [PATCH net-next v6 05/11] net: ti: prueth: Adds ethtool support for ICSSM PRUETH Driver

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Message-ID: <619030056.1172946.1745921203564.JavaMail.zimbra@couthit.local>
Date: Tue, 29 Apr 2025 15:36:43 +0530 (IST)
From: Parvathi Pudi <parvathi@...thit.com>
To: kuba <kuba@...nel.org>
Cc: parvathi <parvathi@...thit.com>, danishanwar <danishanwar@...com>, 
	rogerq <rogerq@...nel.org>, andrew+netdev <andrew+netdev@...n.ch>, 
	davem <davem@...emloft.net>, edumazet <edumazet@...gle.com>, 
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	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>, 
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	krishna <krishna@...thit.com>, pmohan <pmohan@...thit.com>, 
	mohan <mohan@...thit.com>
Subject: Re: [PATCH net-next v6 05/11] net: ti: prueth: Adds ethtool support
 for ICSSM PRUETH Driver

Hi,

> On Wed, 23 Apr 2025 12:53:50 +0530 Parvathi Pudi wrote:
>> From: Roger Quadros <rogerq@...com>
>> 
>> Changes for enabling ethtool support for the newly added PRU Ethernet
>> interfaces. Extends the support for statistics collection from PRU internal
>> memory and displays it in the user space. Along with statistics,
>> enable/disable of features, configuring link speed etc.are now supported.
>> 
>> The firmware running on PRU maintains statistics in internal data memory.
>> When requested ethtool collects all the statistics for the specified
>> interface and displays it in the user space.
>> 
>> Makefile is updated to include ethtool support into PRUETH driver.
> 
> drivers/net/ethernet/ti/icssm/icssm_prueth.h:229: warning: Function parameter or
> struct member 'stormprev_counter_bc' not described in 'port_statistics'
> drivers/net/ethernet/ti/icssm/icssm_prueth.h:229: warning: Function parameter or
> struct member 'stormprev_counter_mc' not described in 'port_statistics'
> drivers/net/ethernet/ti/icssm/icssm_prueth.h:229: warning: Function parameter or
> struct member 'stormprev_counter_uc' not described in 'port_statistics'
> drivers/net/ethernet/ti/icssm/icssm_prueth.h:229: warning: Function parameter or
> struct member 'cs_error' not described in 'port_statistics'
> drivers/net/ethernet/ti/icssm/icssm_prueth.h:229: warning: Excess struct member
> 'stormprev_counter' description in 'port_statistics'
> 

We will address this in the next version.

>> +static const struct {
>> +	char string[ETH_GSTRING_LEN];
>> +	u32 offset;
>> +} prueth_ethtool_stats[] = {
>> +	{"txBcast", PRUETH_STAT_OFFSET(tx_bcast)},
>> +	{"txMcast", PRUETH_STAT_OFFSET(tx_mcast)},
>> +	{"txUcast", PRUETH_STAT_OFFSET(tx_ucast)},
>> +	{"txOctets", PRUETH_STAT_OFFSET(tx_octets)},
>> +	{"rxBcast", PRUETH_STAT_OFFSET(rx_bcast)},
>> +	{"rxMcast", PRUETH_STAT_OFFSET(rx_mcast)},
>> +	{"rxUcast", PRUETH_STAT_OFFSET(rx_ucast)},
>> +	{"rxOctets", PRUETH_STAT_OFFSET(rx_octets)},
>> +
>> +	{"tx64byte", PRUETH_STAT_OFFSET(tx64byte)},
>> +	{"tx65_127byte", PRUETH_STAT_OFFSET(tx65_127byte)},
>> +	{"tx128_255byte", PRUETH_STAT_OFFSET(tx128_255byte)},
>> +	{"tx256_511byte", PRUETH_STAT_OFFSET(tx256_511byte)},
>> +	{"tx512_1023byte", PRUETH_STAT_OFFSET(tx512_1023byte)},
>> +	{"tx1024byte", PRUETH_STAT_OFFSET(tx1024byte)},
>> +	{"rx64byte", PRUETH_STAT_OFFSET(rx64byte)},
>> +	{"rx65_127byte", PRUETH_STAT_OFFSET(rx65_127byte)},
>> +	{"rx128_255byte", PRUETH_STAT_OFFSET(rx128_255byte)},
>> +	{"rx256_511byte", PRUETH_STAT_OFFSET(rx256_511byte)},
>> +	{"rx512_1023byte", PRUETH_STAT_OFFSET(rx512_1023byte)},
>> +	{"rx1024byte", PRUETH_STAT_OFFSET(rx1024byte)},
>> +
>> +	{"lateColl", PRUETH_STAT_OFFSET(late_coll)},
>> +	{"singleColl", PRUETH_STAT_OFFSET(single_coll)},
>> +	{"multiColl", PRUETH_STAT_OFFSET(multi_coll)},
>> +	{"excessColl", PRUETH_STAT_OFFSET(excess_coll)},
> 
> Do not dump into ethtool -S what's reported via standard stats.

This is to align with firmware internal statistics layout. We will
review and address this in the next version.


Thanks and Regards,
Parvathi.