[dpdk-dev] [PATCH] net/ice/base: workaround for unexpected rule deletion

[Zhao1, Wei]

It will be delete after fix in kernel to re-enable vf list feature.

Reviewed-by: Wei Zhao <wei.zhao1 at intel.com>

> -----Original Message-----
> From: dev <dev-bounces at dpdk.org> On Behalf Of Qi Zhang
> Sent: Thursday, April 23, 2020 12:22 PM
> To: Yang, Qiming <qiming.yang at intel.com>
> Cc: Ye, Xiaolong <xiaolong.ye at intel.com>; Xing, Beilei <beilei.xing at intel.com>;
> Zhang, Xiao <xiao.zhang at intel.com>; dev at dpdk.org; Zhang, Qi Z
> <qi.z.zhang at intel.com>
> Subject: [dpdk-dev] [PATCH] net/ice/base: workaround for unexpected rule
> deletion
> 
> Ideally a rule with "TO VSI LIST" action should not be deleted when one of the
> VF reset happens. The correct action by kernel PF driver is to remove the VSI of
> a reset VF from the VSI list, but this is not implemented in kernel PF yet, so
> workaround is the DCF to prevent a rule with "To VSI List" action happens.
> 
> Signed-off-by: Qi Zhang <qi.z.zhang at intel.com>
> ---
>  drivers/net/ice/base/ice_switch.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/net/ice/base/ice_switch.c
> b/drivers/net/ice/base/ice_switch.c
> index 08999d336..b9fa516b0 100644
> --- a/drivers/net/ice/base/ice_switch.c
> +++ b/drivers/net/ice/base/ice_switch.c
> @@ -6438,6 +6438,13 @@ ice_adv_add_update_vsi_list(struct ice_hw *hw,
>  	     cur_fltr->sw_act.fltr_act == ICE_FWD_TO_VSI_LIST))
>  		return ICE_ERR_NOT_IMPL;
> 
> +	/* Workaround fix for unexpected rule deletion by kernel PF
> +	 * during VF reset.
> +	 */
> +	if (new_fltr->sw_act.fltr_act == ICE_FWD_TO_VSI &&
> +	    cur_fltr->sw_act.fltr_act == ICE_FWD_TO_VSI)
> +		return ICE_ERR_NOT_IMPL;
> +
>  	if (m_entry->vsi_count < 2 && !m_entry->vsi_list_info) {
>  		 /* Only one entry existed in the mapping and it was not already
>  		  * a part of a VSI list. So, create a VSI list with the old and
> --
> 2.13.6