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

[Dai, Wei]

> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Laurent Hardy
> Sent: Friday, November 18, 2016 1:30 AM
> To: Zhang, Helin <helin.zhang at intel.com>; Ananyev, Konstantin
> <konstantin.ananyev at intel.com>
> Cc: dev at dpdk.org
> Subject: [dpdk-dev] [PATCH] net/ixgbe: ensure link status is updated
> 
> 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)

Now there is following macro in DPDK 17.02-rc2.
#define IXGBE_FLAG_MACSEC           (uint32_t)(1 << 3)
You can redefine it as #define IXGBE_FLAG_NEED_LINK_CONFIG (uint32_t)(1 << 4)

> 
>  /*
>   * Defines that were not part of ixgbe_type.h as they are not used by the
> --
> 1.7.10.4