[Intel-wired-lan] [next PATCH 3/5] i40e: Enable VF specific ethtool statistics via VF representor netdevs.

[Nambiar, Amritha <amritha.nambiar@intel.com>]

On 8/4/2016 9:49 AM, Sridhar Samudrala wrote:
> Sample script that shows ethtool stats on VF representor netdev
> PF: enp5s0f0, VF0: enp5s2  VF_REP0: enp5s0f0-vf0
>
>     # devlink dev set pci/0000:05:00.0 smode switchdev
>     # echo 2 > /sys/class/net/enp5s0f0/device/sriov_numvfs
>     # ip link set enp5s2 up
>     # ethtool -S enp5s0f0-vf0
>     NIC statistics:
>       rx_bytes: 0
>       rx_unicast: 0
>       rx_multicast: 0
>       rx_broadcast: 0
>       rx_discards: 0
>       rx_unknown_protocol: 0
>       tx_bytes: 140
>       tx_unicast: 0
>       tx_multicast: 2
>       tx_broadcast: 0
>       tx_discards: 0
>       tx_errors: 0
>
> Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>

  Acked-by: Amritha Nambiar <amritha.nambiar@intel.com>

> ---
>   drivers/net/ethernet/intel/i40e/i40e.h             |  1 +
>   drivers/net/ethernet/intel/i40e/i40e_ethtool.c     | 67 ++++++++++++++++++++++
>   drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c |  1 +
>   3 files changed, 69 insertions(+)
>
> diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
> index 724bd82..2d35c0d 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e.h
> +++ b/drivers/net/ethernet/intel/i40e/i40e.h
> @@ -875,4 +875,5 @@ i40e_status i40e_get_npar_bw_setting(struct i40e_pf *pf);
>   i40e_status i40e_set_npar_bw_setting(struct i40e_pf *pf);
>   i40e_status i40e_commit_npar_bw_setting(struct i40e_pf *pf);
>   void i40e_print_link_message(struct i40e_vsi *vsi, bool isup);
> +void i40e_set_vf_netdev_ethtool_ops(struct net_device *netdev);
>   #endif /* _I40E_H_ */
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
> index c912e04..0c3bffa 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
> @@ -3040,3 +3040,70 @@ void i40e_set_ethtool_ops(struct net_device *netdev)
>   {
>   	netdev->ethtool_ops = &i40e_ethtool_ops;
>   }
> +
> +static const char i40e_vf_netdev_ethtool_sset[][ETH_GSTRING_LEN] = {
> +	"rx_bytes",
> +	"rx_unicast",
> +	"rx_multicast",
> +	"rx_broadcast",
> +	"rx_discards",
> +	"rx_unknown_protocol",
> +	"tx_bytes",
> +	"tx_unicast",
> +	"tx_multicast",
> +	"tx_broadcast",
> +	"tx_discards",
> +	"tx_errors",
> +};
> +
> +#define I40E_VF_NETDEV_ETHTOOL_STAT_COUNT \
> +			ARRAY_SIZE(i40e_vf_netdev_ethtool_sset)
> +
> +static void i40e_vf_netdev_ethtool_get_strings(struct net_device *dev,
> +					       u32 stringset,
> +					       u8 *ethtool_strings)
> +{
> +	switch (stringset) {
> +	case ETH_SS_STATS:
> +		memcpy(ethtool_strings, &i40e_vf_netdev_ethtool_sset,
> +		       sizeof(i40e_vf_netdev_ethtool_sset));
> +		break;
> +	}
> +}
> +
> +static int i40e_vf_netdev_ethtool_get_sset_count(struct net_device *dev,
> +						 int stringset)
> +{
> +	switch (stringset) {
> +	case ETH_SS_STATS:
> +		return I40E_VF_NETDEV_ETHTOOL_STAT_COUNT;
> +	default:
> +		return -EOPNOTSUPP;
> +	}
> +}
> +
> +static void i40e_vf_netdev_ethtool_get_stats(struct net_device *dev,
> +				struct ethtool_stats *target_ethtool_stats,
> +				u64 *target_stat_values)
> +{
> +	struct i40e_vf_netdev_priv *priv = netdev_priv(dev);
> +	struct i40e_vf *vf = priv->vf;
> +	struct i40e_pf *pf = vf->pf;
> +	struct i40e_vsi *vsi;
> +
> +	vsi = pf->vsi[vf->lan_vsi_idx];
> +	i40e_update_stats(vsi);
> +	memcpy(target_stat_values, &vsi->eth_stats,
> +	       I40E_VF_NETDEV_ETHTOOL_STAT_COUNT * 8);
> +}
> +
> +static const struct ethtool_ops i40e_vf_netdev_ethtool_ops = {
> +	.get_strings		= i40e_vf_netdev_ethtool_get_strings,
> +	.get_ethtool_stats      = i40e_vf_netdev_ethtool_get_stats,
> +	.get_sset_count         = i40e_vf_netdev_ethtool_get_sset_count,
> +};
> +
> +void i40e_set_vf_netdev_ethtool_ops(struct net_device *netdev)
> +{
> +	netdev->ethtool_ops = &i40e_vf_netdev_ethtool_ops;
> +}
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
> index d41c37c..313a53c 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
> @@ -1046,6 +1046,7 @@ int i40e_alloc_vf_netdev(struct i40e_vf *vf, u16 vf_num)
>   	priv->vf = &(pf->vf[vf_num]);
>   
>   	netdev->netdev_ops = &i40e_vf_netdev_ops;
> +	i40e_set_vf_netdev_ethtool_ops(netdev);
>   
>   	netif_carrier_off(netdev);
>   	netif_tx_disable(netdev);