Re: [dpdk-stable] [PATCH v2] net/i40e: fix link down and negotiation

[Yuanhan Liu <yliu@fridaylinux.org>]

On Fri, Aug 18, 2017 at 06:32:06PM +0800, Jeff Guo wrote:
> [ backported from upstream commit 1bb8f661168d942927cb65e355ec64d4ab195281 ]

Applied to dpdk-stable/16.11.

Thank you!

	--yliu

> 
> Enable the functions set link down and set link up in i40e by check
> phy_type, and fix the issue of auto negotiation failed in XXV710 when
> bind kernel driver after unbind from DPDK driver by modify the speed
> setting distinguish from set link up and down. With this fix, if unbind
> DPDK to bind kernel driver, no need to set auto negotiation and ifconfig
> up anymore, remove the part from doc.
> 
> Fixes: ca7e599d4506 ("net/i40e: fix link management")
> Fixes: 2f1e22817420 ("i40e: skip link control as firmware workaround")
> Fixes: 6e145fcc754b ("i40e: support autoneg or force link speed")
> 
> Signed-off-by: Jeff Guo <jia.guo@intel.com>
> Acked-by: Jingjing Wu <jingjing.wu@intel.com>
> ---
> v2->v1: rebase the branch to 16.11
> ---
>  drivers/net/i40e/i40e_ethdev.c | 34 ++++++++++++++++++++++------------
>  1 file changed, 22 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
> index f65ddc7..65e10f3 100644
> --- a/drivers/net/i40e/i40e_ethdev.c
> +++ b/drivers/net/i40e/i40e_ethdev.c
> @@ -1591,11 +1591,15 @@ i40e_parse_link_speeds(uint16_t link_speeds)
>  static int
>  i40e_phy_conf_link(struct i40e_hw *hw,
>  		   uint8_t abilities,
> -		   uint8_t force_speed)
> +		   uint8_t force_speed,
> +		   bool is_up)
>  {
>  	enum i40e_status_code status;
>  	struct i40e_aq_get_phy_abilities_resp phy_ab;
>  	struct i40e_aq_set_phy_config phy_conf;
> +	enum i40e_aq_phy_type cnt;
> +	uint32_t phy_type_mask = 0;
> +
>  	const uint8_t mask = I40E_AQ_PHY_FLAG_PAUSE_TX |
>  			I40E_AQ_PHY_FLAG_PAUSE_RX |
>  			I40E_AQ_PHY_FLAG_PAUSE_RX |
> @@ -1613,6 +1617,10 @@ i40e_phy_conf_link(struct i40e_hw *hw,
>  	if (status)
>  		return ret;
>  
> +	/* If link already up, no need to set up again */
> +	if (is_up && phy_ab.phy_type != 0)
> +		return I40E_SUCCESS;
> +
>  	memset(&phy_conf, 0, sizeof(phy_conf));
>  
>  	/* bits 0-2 use the values from get_phy_abilities_resp */
> @@ -1623,13 +1631,21 @@ i40e_phy_conf_link(struct i40e_hw *hw,
>  	if (abilities & I40E_AQ_PHY_AN_ENABLED)
>  		phy_conf.link_speed = advt;
>  	else
> -		phy_conf.link_speed = force_speed;
> +		phy_conf.link_speed = is_up ? force_speed : phy_ab.link_speed;
>  
>  	phy_conf.abilities = abilities;
>  
> +
> +
> +	/* To enable link, phy_type mask needs to include each type */
> +	for (cnt = I40E_PHY_TYPE_SGMII; cnt < I40E_PHY_TYPE_MAX; cnt++)
> +		phy_type_mask |= 1 << cnt;
> +
>  	/* use get_phy_abilities_resp value for the rest */
> -	phy_conf.phy_type = phy_ab.phy_type;
> -	phy_conf.phy_type_ext = phy_ab.phy_type_ext;
> +	phy_conf.phy_type = is_up ? cpu_to_le32(phy_type_mask) : 0;
> +	phy_conf.phy_type_ext = is_up ? (I40E_AQ_PHY_TYPE_EXT_25G_KR |
> +		I40E_AQ_PHY_TYPE_EXT_25G_CR | I40E_AQ_PHY_TYPE_EXT_25G_SR |
> +		I40E_AQ_PHY_TYPE_EXT_25G_LR) : 0;
>  	phy_conf.fec_config = phy_ab.mod_type_ext;
>  	phy_conf.eee_capability = phy_ab.eee_capability;
>  	phy_conf.eeer = phy_ab.eeer_val;
> @@ -1661,13 +1677,7 @@ i40e_apply_link_speed(struct rte_eth_dev *dev)
>  		abilities |= I40E_AQ_PHY_AN_ENABLED;
>  	abilities |= I40E_AQ_PHY_LINK_ENABLED;
>  
> -	/* Skip changing speed on 40G interfaces, FW does not support */
> -	if (I40E_PHY_TYPE_SUPPORT_40G(hw->phy.phy_types)) {
> -		speed =  I40E_LINK_SPEED_UNKNOWN;
> -		abilities |= I40E_AQ_PHY_AN_ENABLED;
> -	}
> -
> -	return i40e_phy_conf_link(hw, abilities, speed);
> +	return i40e_phy_conf_link(hw, abilities, speed, true);
>  }
>  
>  static int
> @@ -1992,7 +2002,7 @@ i40e_dev_set_link_down(struct rte_eth_dev *dev)
>  	struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);
>  
>  	abilities = I40E_AQ_PHY_ENABLE_ATOMIC_LINK;
> -	return i40e_phy_conf_link(hw, abilities, speed);
> +	return i40e_phy_conf_link(hw, abilities, speed, false);
>  }
>  
>  int
> -- 
> 2.7.4