Re: [dpdk-dev] [PATCH] net/ixgbe: delete MAC control frame fwd in struct adapter

["Zhao1, Wei" <wei.zhao1@intel.com>]

Hi, Guinan
 
> -----Original Message-----
> From: Sun, GuinanX <guinanx.sun@intel.com>
> Sent: Friday, May 22, 2020 2:12 PM
> To: dev@dpdk.org
> Cc: Zhao1, Wei <wei.zhao1@intel.com>; Sun, GuinanX
> <guinanx.sun@intel.com>; stable@dpdk.org
> Subject: [PATCH] net/ixgbe: delete MAC control frame fwd in struct adapter
> 
> If some user set mac_ctrl_frame_fwd to 1 from fc ops, then he do a port reset
> process of
> 
> testpmd> start
> testpmd> set flow_ctrl mac_ctrl_frame_fwd on 0 stop port stop 0 port
> testpmd> start 0 start

This test step seems confused.

> 
> Then after this process, the mac_ctrl_frame_fwd has been change to "off", so
> we should delete "adapter->mac_ctrl_frame_fwd = 0;" from dev-stop.
> 
> In addition, add a value to mac_ctrl_frame_fwd in the ixgbe_flow_ctrl_get ()
> function.
> 
> Fixes: a524f550da6e ("net/ixgbe: fix flow control mode setting")
> Cc: stable@dpdk.org
> 
> Signed-off-by: SunGuinan <guinanx.sun@intel.com>
> ---
>  drivers/net/ixgbe/ixgbe_ethdev.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c
> b/drivers/net/ixgbe/ixgbe_ethdev.c
> index f8a84c565..dd4023f01 100644
> --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> @@ -2939,8 +2939,6 @@ ixgbe_dev_stop(struct rte_eth_dev *dev)
> 
>  	adapter->rss_reta_updated = 0;
> 
> -	adapter->mac_ctrl_frame_fwd = 0;
> -
>  	hw->adapter_stopped = true;
>  }
> 
> @@ -4754,6 +4752,8 @@ ixgbe_flow_ctrl_get(struct rte_eth_dev *dev, struct
> rte_eth_fc_conf *fc_conf)
>  	 * MFLCN register.
>  	 */
>  	mflcn_reg = IXGBE_READ_REG(hw, IXGBE_MFLCN);
> +	fc_conf->mac_ctrl_frame_fwd = mflcn_reg;
> +
>  	if (mflcn_reg & (IXGBE_MFLCN_RPFCE | IXGBE_MFLCN_RFCE))
>  		rx_pause = 1;
>  	else
> --
> 2.17.1