Re: [dpdk-dev] [PATCH v1 2/2] net/ice: merge inner/outer flow seg info for FDIR

["Zhang, Qi Z" <qi.z.zhang@intel.com>]

> -----Original Message-----
> From: Yan, Zhirun <zhirun.yan@intel.com>
> Sent: Tuesday, September 8, 2020 3:40 PM
> To: Zhang, Qi Z <qi.z.zhang@intel.com>; dev@dpdk.org
> Cc: Cao, Yahui <yahui.cao@intel.com>; Wang, Xiao W
> <xiao.w.wang@intel.com>; Su, Simei <simei.su@intel.com>; Guo, Junfeng
> <junfeng.guo@intel.com>; Yan, Zhirun <zhirun.yan@intel.com>
> Subject: [PATCH v1 2/2] net/ice: merge inner/outer flow seg info for FDIR
> 
> For tunnel and non-tunnel packets, it can share the same seg_tun info.
> seg_tun[1] can be used for supporting inner fields with tunnel flow rule or for
> non-tunnel packets, seg_tun[0] only used for tunnel outer part.
> Add outer_input_set to distinguish inner/outer input set. So we can identify
> different fields in outer or inner part.
> 
> Signed-off-by: Zhirun Yan <zhirun.yan@intel.com>
> ---
>  drivers/net/ice/ice_ethdev.h      |  1 +
>  drivers/net/ice/ice_fdir_filter.c | 65 +++++++++++++++++--------------
>  2 files changed, 37 insertions(+), 29 deletions(-)
> 
> diff --git a/drivers/net/ice/ice_ethdev.h b/drivers/net/ice/ice_ethdev.h index
> 393dfeab1..6bc6dfbfb 100644
> --- a/drivers/net/ice/ice_ethdev.h
> +++ b/drivers/net/ice/ice_ethdev.h
> @@ -285,6 +285,7 @@ struct ice_fdir_filter_conf {
>  	struct rte_flow_action_count act_count;
> 
>  	uint64_t input_set;
> +	uint64_t outer_input_set; /* only for tunnel packets outer fields */
>  };
> 
>  #define ICE_MAX_FDIR_FILTER_NUM		(1024 * 16)
> diff --git a/drivers/net/ice/ice_fdir_filter.c b/drivers/net/ice/ice_fdir_filter.c
> index 593dfd0e2..24fbcdd60 100644
> --- a/drivers/net/ice/ice_fdir_filter.c
> +++ b/drivers/net/ice/ice_fdir_filter.c
> @@ -1047,51 +1047,59 @@ ice_fdir_input_set_hdrs(enum ice_fltr_ptype
> flow, struct ice_flow_seg_info *seg,
> 
>  static int
>  ice_fdir_input_set_conf(struct ice_pf *pf, enum ice_fltr_ptype flow,
> -			uint64_t input_set, enum ice_fdir_tunnel_type ttype)
> +			uint64_t inner_input_set, uint64_t outer_input_set,
> +			enum ice_fdir_tunnel_type ttype)
>  {
>  	struct ice_flow_seg_info *seg;
>  	struct ice_flow_seg_info *seg_tun = NULL;
>  	enum ice_flow_field field[ICE_FLOW_FIELD_IDX_MAX];
> +	uint64_t input_set;
>  	bool is_tunnel;
> -	int i, ret;
> +	int k, i, ret = 0;
> 
> -	if (!input_set)
> +	if (!(inner_input_set | outer_input_set))
>  		return -EINVAL;
> 
> -	seg = (struct ice_flow_seg_info *)
> -		ice_malloc(hw, sizeof(*seg));
> -	if (!seg) {
> +	seg_tun = (struct ice_flow_seg_info *)
> +		ice_malloc(hw, sizeof(*seg_tun) * ICE_FD_HW_SEG_MAX);
> +	if (!seg_tun) {
>  		PMD_DRV_LOG(ERR, "No memory can be allocated");
>  		return -ENOMEM;
>  	}
> 
> -	for (i = 0; i < ICE_FLOW_FIELD_IDX_MAX; i++)
> -		field[i] = ICE_FLOW_FIELD_IDX_MAX;
> +	/* use seg_tun[1] to record tunnel inner part or non-tunnel */
> +	for (k = ICE_FD_HW_SEG_TUN; k >= 0; k--) {

Why we have to iterate in inverse order, can we start from 0?

> +		seg = &seg_tun[k];
> +		if (k == ICE_FD_HW_SEG_TUN) {
> +			if (inner_input_set == 0)
> +				continue;
> +			input_set = inner_input_set;
> +		} else {
> +			if (outer_input_set == 0)
> +				break;
> +			input_set = outer_input_set;
> +		}

above code can be simplified as below?

	for (....) {
		inputset = (k == ICE_FD_HW_SEG_TUN) ? inner_input_set : outer_input_set;
		if (inputset == 0)
			continue;
		....
	

Btw, and I'm ok with all other changes.


> +
> +		for (i = 0; i < ICE_FLOW_FIELD_IDX_MAX; i++)
> +			field[i] = ICE_FLOW_FIELD_IDX_MAX;
> 
> -	ice_fdir_input_set_parse(input_set, field);
> +		ice_fdir_input_set_parse(input_set, field);
> 
> -	ice_fdir_input_set_hdrs(flow, seg, ttype);
> +		ice_fdir_input_set_hdrs(flow, seg, ttype);
> 
> -	for (i = 0; field[i] != ICE_FLOW_FIELD_IDX_MAX; i++) {
> -		ice_flow_set_fld(seg, field[i],
> -				 ICE_FLOW_FLD_OFF_INVAL,
> -				 ICE_FLOW_FLD_OFF_INVAL,
> -				 ICE_FLOW_FLD_OFF_INVAL, false);
> +		for (i = 0; field[i] != ICE_FLOW_FIELD_IDX_MAX; i++) {
> +			ice_flow_set_fld(seg, field[i],
> +					 ICE_FLOW_FLD_OFF_INVAL,
> +					 ICE_FLOW_FLD_OFF_INVAL,
> +					 ICE_FLOW_FLD_OFF_INVAL, false);
> +		}
>  	}
> 
>  	is_tunnel = ice_fdir_is_tunnel_profile(ttype);
>  	if (!is_tunnel) {
>  		ret = ice_fdir_hw_tbl_conf(pf, pf->main_vsi, pf->fdir.fdir_vsi,
> -					   seg, flow, false);
> +					   seg_tun + 1, flow, false);
>  	} else {
> -		seg_tun = (struct ice_flow_seg_info *)
> -			ice_malloc(hw, sizeof(*seg) * ICE_FD_HW_SEG_MAX);
> -		if (!seg_tun) {
> -			PMD_DRV_LOG(ERR, "No memory can be allocated");
> -			rte_free(seg);
> -			return -ENOMEM;
> -		}
> -		rte_memcpy(&seg_tun[1], seg, sizeof(*seg));
>  		ret = ice_fdir_hw_tbl_conf(pf, pf->main_vsi, pf->fdir.fdir_vsi,
>  					   seg_tun, flow, true);
>  	}
> @@ -1099,9 +1107,7 @@ ice_fdir_input_set_conf(struct ice_pf *pf, enum
> ice_fltr_ptype flow,
>  	if (!ret) {
>  		return ret;
>  	} else if (ret < 0) {
> -		rte_free(seg);
> -		if (is_tunnel)
> -			rte_free(seg_tun);
> +		rte_free(seg_tun);
>  		return (ret == -EEXIST) ? 0 : ret;
>  	} else {
>  		return ret;
> @@ -1311,7 +1317,8 @@ ice_fdir_create_filter(struct ice_adapter *ad,
>  	is_tun = ice_fdir_is_tunnel_profile(filter->tunnel_type);
> 
>  	ret = ice_fdir_input_set_conf(pf, filter->input.flow_type,
> -			filter->input_set, filter->tunnel_type);
> +				      filter->input_set, filter->outer_input_set,
> +				      filter->tunnel_type);
>  	if (ret) {
>  		rte_flow_error_set(error, -ret,
>  				   RTE_FLOW_ERROR_TYPE_HANDLE, NULL, @@ -2106,7
> +2113,7 @@ ice_fdir_parse(struct ice_adapter *ad,
>  	ret = ice_fdir_parse_pattern(ad, pattern, error, filter);
>  	if (ret)
>  		goto error;
> -	input_set = filter->input_set;
> +	input_set = filter->input_set | filter->outer_input_set;
>  	if (!input_set || input_set & ~item->input_set_mask) {
>  		rte_flow_error_set(error, EINVAL,
>  				   RTE_FLOW_ERROR_TYPE_ITEM_SPEC,
> --
> 2.25.1