[dpdk-dev] [PATCH] net/ixgbe: ensure link status is updated

[Laurent Hardy]

Hello,
Is there anyone available to review this patch ?

regards,
Laurent

On 11/17/2016 06:29 PM, Laurent Hardy wrote:
> In case of link speed set to 1Gb at peer side (with autoneg or with
> defined speed) and cable not plugged-in when device is configured
> and started, then link status is not updated properly with new speed
> as no link setup is triggered.
>
> To avoid this issue, IXGBE_FLAG_NEED_LINK_CONFIG is set to try a link
> setup each time link_update() is triggered and current link status is
> down. When cable is plugged-in, link setup will be performed via
> ixgbe_setup_link().
>
> Signed-off-by: Laurent Hardy <laurent.hardy at 6wind.com>
> ---
>   drivers/net/ixgbe/ixgbe_ethdev.c |   20 ++++++++++++++++++++
>   drivers/net/ixgbe/ixgbe_ethdev.h |    1 +
>   2 files changed, 21 insertions(+)
>
> diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
> index 52ebbe4..513d1d5 100644
> --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> @@ -2095,6 +2095,7 @@ ixgbe_dev_configure(struct rte_eth_dev *dev)
>   
>   	/* set flag to update link status after init */
>   	intr->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
> +	intr->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
>   
>   	/*
>   	 * Initialize to TRUE. If any of Rx queues doesn't meet the bulk
> @@ -3117,8 +3118,12 @@ ixgbe_dev_link_update(struct rte_eth_dev *dev, int wait_to_complete)
>   	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
>   	struct rte_eth_link link, old;
>   	ixgbe_link_speed link_speed = IXGBE_LINK_SPEED_UNKNOWN;
> +	struct ixgbe_interrupt *intr =
> +		IXGBE_DEV_PRIVATE_TO_INTR(dev->data->dev_private);
>   	int link_up;
>   	int diag;
> +	u32 speed = 0;
> +	bool autoneg = false;
>   
>   	link.link_status = ETH_LINK_DOWN;
>   	link.link_speed = 0;
> @@ -3128,6 +3133,19 @@ ixgbe_dev_link_update(struct rte_eth_dev *dev, int wait_to_complete)
>   
>   	hw->mac.get_link_status = true;
>   
> +	if (intr->flags & IXGBE_FLAG_NEED_LINK_CONFIG) {
> +		speed = hw->phy.autoneg_advertised;
> +		if (!speed) {
> +			ixgbe_get_link_capabilities(hw, &speed, &autoneg);
> +			/* setup the highest link when no autoneg */
> +			if (!autoneg) {
> +				if (speed & IXGBE_LINK_SPEED_10GB_FULL)
> +					speed = IXGBE_LINK_SPEED_10GB_FULL;
> +			}
> +		}
> +		ixgbe_setup_link(hw, speed, true);
> +	}
> +
>   	/* check if it needs to wait to complete, if lsc interrupt is enabled */
>   	if (wait_to_complete == 0 || dev->data->dev_conf.intr_conf.lsc != 0)
>   		diag = ixgbe_check_link(hw, &link_speed, &link_up, 0);
> @@ -3145,10 +3163,12 @@ ixgbe_dev_link_update(struct rte_eth_dev *dev, int wait_to_complete)
>   
>   	if (link_up == 0) {
>   		rte_ixgbe_dev_atomic_write_link_status(dev, &link);
> +		intr->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
>   		if (link.link_status == old.link_status)
>   			return -1;
>   		return 0;
>   	}
> +	intr->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
>   	link.link_status = ETH_LINK_UP;
>   	link.link_duplex = ETH_LINK_FULL_DUPLEX;
>   
> diff --git a/drivers/net/ixgbe/ixgbe_ethdev.h b/drivers/net/ixgbe/ixgbe_ethdev.h
> index e060c3d..9d335ba 100644
> --- a/drivers/net/ixgbe/ixgbe_ethdev.h
> +++ b/drivers/net/ixgbe/ixgbe_ethdev.h
> @@ -43,6 +43,7 @@
>   #define IXGBE_FLAG_NEED_LINK_UPDATE (uint32_t)(1 << 0)
>   #define IXGBE_FLAG_MAILBOX          (uint32_t)(1 << 1)
>   #define IXGBE_FLAG_PHY_INTERRUPT    (uint32_t)(1 << 2)
> +#define IXGBE_FLAG_NEED_LINK_CONFIG (uint32_t)(1 << 3)
>   
>   /*
>    * Defines that were not part of ixgbe_type.h as they are not used by the