netdev - Re: [PATCH net-next] ionic: add support for ethtool extended stat link_down

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Date: Mon, 5 Jun 2023 09:31:08 -0700
From: Shannon Nelson <shannon.nelson@....com>
To: Siddharth Vadapalli <s-vadapalli@...com>, netdev@...r.kernel.org,
 davem@...emloft.net, kuba@...nel.org
Cc: brett.creeley@....com, drivers@...sando.io,
 Nitya Sunkad <nitya.sunkad@....com>
Subject: Re: [PATCH net-next] ionic: add support for ethtool extended stat
 link_down_count

On 6/2/23 11:11 PM, Siddharth Vadapalli wrote:
> On 02-06-2023 23:02, Shannon Nelson wrote:
>> From: Nitya Sunkad <nitya.sunkad@....com>
>>
>> Following the example of 9a0f830f8026 ("ethtool: linkstate: add a statistic
>> for PHY down events"), added support for link down events.
> 
> s/added/add. >
>>
>> Added callback ionic_get_link_ext_stats to ionic_ethtool.c to support
> 
> s/Added/Add >
>> link_down_count, a property of netdev that gets incremented every time
>> the device link goes down.
> 
> Please use imperative mood when writing commit messages.

We'll get these fixed up in a re-spin.

> Also, I think it is a good practice to Cc all the email IDs generated by
> ./scripts/get_maintainer.pl.

Thanks, I'll keep that in mind.

sln

> 
>>
>> Run ethtool -I <devname> to display the device link down count.
>>
>> Signed-off-by: Nitya Sunkad <nitya.sunkad@....com>
>> Signed-off-by: Shannon Nelson <shannon.nelson@....com>
> 
> Apart from my comments above, the patch looks good to me.
> 
> Reviewed-by: Siddharth Vadapalli <s-vadapalli@...com>
> 
>> ---
>>   drivers/net/ethernet/pensando/ionic/ionic_ethtool.c | 9 +++++++++
>>   drivers/net/ethernet/pensando/ionic/ionic_lif.c     | 1 +
>>   drivers/net/ethernet/pensando/ionic/ionic_lif.h     | 1 +
>>   3 files changed, 11 insertions(+)
>>
>> diff --git a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
>> index 9b2b96fa36af..4c527a06e7d9 100644
>> --- a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
>> +++ b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
>> @@ -104,6 +104,14 @@ static void ionic_get_regs(struct net_device *netdev, struct ethtool_regs *regs,
>>        memcpy_fromio(p + offset, lif->ionic->idev.dev_cmd_regs->words, size);
>>   }
>>
>> +static void ionic_get_link_ext_stats(struct net_device *netdev,
>> +                                  struct ethtool_link_ext_stats *stats)
>> +{
>> +     struct ionic_lif *lif = netdev_priv(netdev);
>> +
>> +     stats->link_down_events = lif->link_down_count;
>> +}
>> +
>>   static int ionic_get_link_ksettings(struct net_device *netdev,
>>                                    struct ethtool_link_ksettings *ks)
>>   {
>> @@ -1074,6 +1082,7 @@ static const struct ethtool_ops ionic_ethtool_ops = {
>>        .get_regs_len           = ionic_get_regs_len,
>>        .get_regs               = ionic_get_regs,
>>        .get_link               = ethtool_op_get_link,
>> +     .get_link_ext_stats     = ionic_get_link_ext_stats,
>>        .get_link_ksettings     = ionic_get_link_ksettings,
>>        .set_link_ksettings     = ionic_set_link_ksettings,
>>        .get_coalesce           = ionic_get_coalesce,
>> diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
>> index 957027e546b3..6ccc1ea91992 100644
>> --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
>> +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
>> @@ -168,6 +168,7 @@ static void ionic_link_status_check(struct ionic_lif *lif)
>>                }
>>        } else {
>>                if (netif_carrier_ok(netdev)) {
>> +                     lif->link_down_count++;
>>                        netdev_info(netdev, "Link down\n");
>>                        netif_carrier_off(netdev);
>>                }
>> diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
>> index c9c4c46d5a16..fd2ea670e7d8 100644
>> --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h
>> +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
>> @@ -201,6 +201,7 @@ struct ionic_lif {
>>        u64 hw_features;
>>        bool registered;
>>        u16 lif_type;
>> +     unsigned int link_down_count;
>>        unsigned int nmcast;
>>        unsigned int nucast;
>>        unsigned int nvlans;
> 
> --
> Regards,
> Siddharth.