netdev - [PATCH net v2 6/6] igc: Fix Energy Efficient Ethernet support declaration

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Date: Tue, 4 Jun 2024 07:08:34 +0000
From: Hariprasad Kelam <hkelam@...vell.com>
To: Jacob Keller <jacob.e.keller@...el.com>, Jakub Kicinski <kuba@...nel.org>,
        netdev <netdev@...r.kernel.org>, David Miller <davem@...emloft.net>
CC: Sasha Neftin <sasha.neftin@...el.com>,
        Dima Ruinskiy
	<dima.ruinskiy@...el.com>,
        Naama Meir <naamax.meir@...ux.intel.com>
Subject: [PATCH net v2 6/6] igc: Fix Energy Efficient Ethernet support
 declaration



> From: Sasha Neftin <sasha.neftin@...el.com>
> 
> The commit 01cf893bf0f4 ("net: intel: i40e/igc: Remove setting Autoneg in
> EEE capabilities") removed SUPPORTED_Autoneg field but left inappropriate
> ethtool_keee structure initialization. When "ethtool --show <device>"
> (get_eee) invoke, the 'ethtool_keee' structure was accidentally overridden.
> Remove the 'ethtool_keee' overriding and add EEE declaration as per IEEE
> specification that allows reporting Energy Efficient Ethernet capabilities.
> 
> Examples:
> Before fix:
> ethtool --show-eee enp174s0
> EEE settings for enp174s0:
> 	EEE status: not supported
> 
> After fix:
> EEE settings for enp174s0:
> 	EEE status: disabled
> 	Tx LPI: disabled
> 	Supported EEE link modes:  100baseT/Full
> 	                           1000baseT/Full
> 	                           2500baseT/Full
> 
> Fixes: 01cf893bf0f4 ("net: intel: i40e/igc: Remove setting Autoneg in EEE
> capabilities")
> Suggested-by: Dima Ruinskiy <dima.ruinskiy@...el.com>
> Signed-off-by: Sasha Neftin <sasha.neftin@...el.com>
> Tested-by: Naama Meir <naamax.meir@...ux.intel.com>
> Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
> ---
>  drivers/net/ethernet/intel/igc/igc_ethtool.c | 9 +++++++--
>  drivers/net/ethernet/intel/igc/igc_main.c    | 4 ++++
>  2 files changed, 11 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/intel/igc/igc_ethtool.c
> b/drivers/net/ethernet/intel/igc/igc_ethtool.c
> index f2c4f1966bb0..0cd2bd695db1 100644
> --- a/drivers/net/ethernet/intel/igc/igc_ethtool.c
> +++ b/drivers/net/ethernet/intel/igc/igc_ethtool.c
> @@ -1629,12 +1629,17 @@ static int igc_ethtool_get_eee(struct net_device
> *netdev,
>  	struct igc_hw *hw = &adapter->hw;
>  	u32 eeer;
> 
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
> +			 edata->supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
> +			 edata->supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
> +			 edata->supported);
> +
>  	if (hw->dev_spec._base.eee_enable)
>  		mii_eee_cap1_mod_linkmode_t(edata->advertised,
>  					    adapter->eee_advert);
> 
> -	*edata = adapter->eee;
> -
>  	eeer = rd32(IGC_EEER);
> 
>  	/* EEE status on negotiated link */
> diff --git a/drivers/net/ethernet/intel/igc/igc_main.c
> b/drivers/net/ethernet/intel/igc/igc_main.c
> index 12f004f46082..305e05294a26 100644
> --- a/drivers/net/ethernet/intel/igc/igc_main.c
> +++ b/drivers/net/ethernet/intel/igc/igc_main.c
> @@ -12,6 +12,7 @@
>  #include <linux/bpf_trace.h>
>  #include <net/xdp_sock_drv.h>
>  #include <linux/pci.h>
> +#include <linux/mdio.h>
> 
>  #include <net/ipv6.h>
> 
> @@ -4975,6 +4976,9 @@ void igc_up(struct igc_adapter *adapter)
>  	/* start the watchdog. */
>  	hw->mac.get_link_status = true;
>  	schedule_work(&adapter->watchdog_task);
> +
> +	adapter->eee_advert = MDIO_EEE_100TX | MDIO_EEE_1000T |
> +			      MDIO_EEE_2_5GT;

        Since advertised is supported here, does it make sense add below in " igc_ethtool_get_eee"

        linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
> +			 edata->advertisied);

Thanks,
Hariprasad k
>  }
> 
>  /**
> 
> --
> 2.44.0.53.g0f9d4d28b7e6
>