netdev - Re: [PATCH net-next v2 6/7] net: ti: icssg-prueth: Add multicast filtering support in HSR mode

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Message-ID: <ac6e47f1-5d60-4fc2-8138-5cddc17f0c4c@ti.com>
Date: Thu, 22 Aug 2024 11:26:49 +0530
From: MD Danish Anwar <danishanwar@...com>
To: Roger Quadros <rogerq@...nel.org>,
        Dan Carpenter
	<dan.carpenter@...aro.org>,
        Andrew Lunn <andrew@...n.ch>, Jan Kiszka
	<jan.kiszka@...mens.com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Javier
 Carrasco <javier.carrasco.cruz@...il.com>,
        Jacob Keller
	<jacob.e.keller@...el.com>,
        Diogo Ivo <diogo.ivo@...mens.com>, Simon Horman
	<horms@...nel.org>,
        Richard Cochran <richardcochran@...il.com>,
        Paolo Abeni
	<pabeni@...hat.com>, Jakub Kicinski <kuba@...nel.org>,
        Eric Dumazet
	<edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>
CC: <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <srk@...com>
Subject: Re: [PATCH net-next v2 6/7] net: ti: icssg-prueth: Add multicast
 filtering support in HSR mode



On 21/08/24 5:40 pm, Roger Quadros wrote:
> 
> 
> On 13/08/2024 10:42, MD Danish Anwar wrote:
>> Add support for multicast filtering in HSR mode
>>
>> Signed-off-by: MD Danish Anwar <danishanwar@...com>
>> ---
>>  drivers/net/ethernet/ti/icssg/icssg_prueth.c | 38 +++++++++++++++++++-
>>  1 file changed, 37 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
>> index b32a2bff34dc..521e9f914459 100644
>> --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c
>> +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
>> @@ -490,6 +490,36 @@ static int icssg_prueth_del_mcast(struct net_device *ndev, const u8 *addr)
>>  	return 0;
>>  }
>>  
>> +static int icssg_prueth_hsr_add_mcast(struct net_device *ndev, const u8 *addr)
>> +{
>> +	struct prueth_emac *emac = netdev_priv(ndev);
>> +	struct prueth *prueth = emac->prueth;
>> +
>> +	icssg_fdb_add_del(emac, addr, prueth->default_vlan,
>> +			  ICSSG_FDB_ENTRY_P0_MEMBERSHIP |
>> +			  ICSSG_FDB_ENTRY_P1_MEMBERSHIP |
>> +			  ICSSG_FDB_ENTRY_P2_MEMBERSHIP |
>> +			  ICSSG_FDB_ENTRY_BLOCK, true);
>> +
>> +	icssg_vtbl_modify(emac, emac->port_vlan, BIT(emac->port_id),
>> +			  BIT(emac->port_id), true);
>> +	return 0;
>> +}
>> +
>> +static int icssg_prueth_hsr_del_mcast(struct net_device *ndev, const u8 *addr)
>> +{
>> +	struct prueth_emac *emac = netdev_priv(ndev);
>> +	struct prueth *prueth = emac->prueth;
>> +
>> +	icssg_fdb_add_del(emac, addr, prueth->default_vlan,
>> +			  ICSSG_FDB_ENTRY_P0_MEMBERSHIP |
>> +			  ICSSG_FDB_ENTRY_P1_MEMBERSHIP |
>> +			  ICSSG_FDB_ENTRY_P2_MEMBERSHIP |
>> +			  ICSSG_FDB_ENTRY_BLOCK, false);
>> +
>> +	return 0;
>> +}
>> +
>>  /**
>>   * emac_ndo_open - EMAC device open
>>   * @ndev: network adapter device
>> @@ -651,6 +681,7 @@ static int emac_ndo_stop(struct net_device *ndev)
>>  	icssg_class_disable(prueth->miig_rt, prueth_emac_slice(emac));
>>  
>>  	__dev_mc_unsync(ndev, icssg_prueth_del_mcast);
> 
> Above unsync call will already remove all MC addresses so nothing
> is left to unsync in the below unsync call.
>> +	__dev_mc_unsync(ndev, icssg_prueth_hsr_del_mcast);
> 
> Do you have to use an if/else like you do while calling __dev_mc_sync?
> 

Yes Roger, we will need and if/else here and remove MC addresses based
on the current mode.

if (emac->prueth->is_hsr_offload_mode)
	__dev_mc_unsync(ndev, icssg_prueth_hsr_del_mcast);
else
	__dev_mc_unsync(ndev, icssg_prueth_del_mcast);

I will make this change and update the series.

>>  
>>  	atomic_set(&emac->tdown_cnt, emac->tx_ch_num);
>>  	/* ensure new tdown_cnt value is visible */
>> @@ -728,7 +759,12 @@ static void emac_ndo_set_rx_mode_work(struct work_struct *work)
>>  		return;
>>  	}
>>  
>> -	__dev_mc_sync(ndev, icssg_prueth_add_mcast, icssg_prueth_del_mcast);
>> +	if (emac->prueth->is_hsr_offload_mode)
>> +		__dev_mc_sync(ndev, icssg_prueth_hsr_add_mcast,
>> +			      icssg_prueth_hsr_del_mcast);
>> +	else
>> +		__dev_mc_sync(ndev, icssg_prueth_add_mcast,
>> +			      icssg_prueth_del_mcast);
>>  }
>>  
>>  /**
> 

-- 
Thanks and Regards,
Danish