Re: [dpdk-dev] [PATCH] i40e: remove ALLOW_LB flag on SRIOV vsi

["Zhang, Helin" <helin.zhang@intel.com>]

> -----Original Message-----
> From: Wu, Jingjing
> Sent: Friday, March 20, 2015 3:32 PM
> To: dev@dpdk.org
> Cc: Wu, Jingjing; Xu, HuilongX; Zhang, Helin
> Subject: [PATCH] i40e: remove ALLOW_LB flag on SRIOV vsi
> 
> Disable VEB switching by removing ALLOW_LB on SRIOV vsi.
> 
> If the source mac address of packet sent from VF is not listed in the VEB's mac
> table, the VEB will switch the packet back to the VF.
> It's a hardware issue. Enabling ALLOW_LB flag will block VF functions.
> 
> Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
Acked-by: Helin Zhang <helin.zhang@intel.com>
> ---
>  lib/librte_pmd_i40e/i40e_ethdev.c | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
> 
> diff --git a/lib/librte_pmd_i40e/i40e_ethdev.c
> b/lib/librte_pmd_i40e/i40e_ethdev.c
> index cf6685e..28ea5dc 100644
> --- a/lib/librte_pmd_i40e/i40e_ethdev.c
> +++ b/lib/librte_pmd_i40e/i40e_ethdev.c
> @@ -3059,11 +3059,15 @@ i40e_vsi_setup(struct i40e_pf *pf,
>  		ctxt.connection_type = 0x1;
>  		ctxt.flags = I40E_AQ_VSI_TYPE_VF;
> 
> -		/* Configure switch ID */
> -		ctxt.info.valid_sections |=
> -			rte_cpu_to_le_16(I40E_AQ_VSI_PROP_SWITCH_VALID);
> -		ctxt.info.switch_id =
> -			rte_cpu_to_le_16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
> +		/**
> +		 * Do not configure switch ID to enable VEB switch by
> +		 * I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB. Because in Fortville,
> +		 * if the source mac address of packet sent from VF is not
> +		 * listed in the VEB's mac table, the VEB will switch the
> +		 * packet back to the VF. Need to enable it when HW issue
> +		 * is fixed.
> +		 */
> +
>  		/* Configure port/vlan */
>  		ctxt.info.valid_sections |=
>  			rte_cpu_to_le_16(I40E_AQ_VSI_PROP_VLAN_VALID);
> --
> 1.9.3