[dpdk-stable] [PATCH 20.11] net/ice: fix RSS for L2 packet

[Xueming(Steven) Li]

Applied, thanks for the backport


> -----Original Message-----
> From: stable <stable-bounces at dpdk.org> On Behalf Of Wenjun Wu
> Sent: Thursday, June 17, 2021 10:56 AM
> To: stable at dpdk.org; qiming.yang at intel.com; qi.z.zhang at intel.com
> Cc: Wenjun Wu <wenjun1.wu at intel.com>
> Subject: [dpdk-stable] [PATCH 20.11] net/ice: fix RSS for L2 packet
> 
> RSS support for L2 non-ip packets is missing in previous versions.
> 
> However, due to code refactor, the fix [1] in main branch cannot be applied directly. This patch fixes this issue in stable versions.
> 
> [1] https://patchwork.dpdk.org/patch/94066/
> 
> Fixes: 5ad3db8d4bdd ("net/ice: enable advanced RSS")
> 
> Signed-off-by: Wenjun Wu <wenjun1.wu at intel.com>
> ---
>  drivers/net/ice/base/ice_flow.c |  2 +-
>  drivers/net/ice/ice_hash.c      | 14 ++++++++++++++
>  2 files changed, 15 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ice/base/ice_flow.c b/drivers/net/ice/base/ice_flow.c index 548d998546..c75f58659c 100644
> --- a/drivers/net/ice/base/ice_flow.c
> +++ b/drivers/net/ice/base/ice_flow.c
> @@ -3233,7 +3233,7 @@ ice_flow_add_fld_raw(struct ice_flow_seg_info *seg, u16 off, u8 len,  }
> 
>  #define ICE_FLOW_RSS_SEG_HDR_L2_MASKS \ -(ICE_FLOW_SEG_HDR_ETH | ICE_FLOW_SEG_HDR_VLAN)
> +(ICE_FLOW_SEG_HDR_ETH | ICE_FLOW_SEG_HDR_ETH_NON_IP |
> +ICE_FLOW_SEG_HDR_VLAN)
> 
>  #define ICE_FLOW_RSS_SEG_HDR_L3_MASKS \
>  	(ICE_FLOW_SEG_HDR_IPV4 | ICE_FLOW_SEG_HDR_IPV6) diff --git a/drivers/net/ice/ice_hash.c b/drivers/net/ice/ice_hash.c
> index fe3e06c579..1bb7d2c7c6 100644
> --- a/drivers/net/ice/ice_hash.c
> +++ b/drivers/net/ice/ice_hash.c
> @@ -312,6 +312,9 @@ struct rss_type_match_hdr hint_eth_pppoes_ipv6_tcp = {  struct rss_type_match_hdr hint_eth_pppoes = {
>  	ICE_FLOW_SEG_HDR_PPPOE,
>  	ETH_RSS_ETH | ETH_RSS_PPPOE};
> +struct rss_type_match_hdr hint_ethertype = {
> +	ICE_FLOW_SEG_HDR_ETH | ICE_FLOW_SEG_HDR_ETH_NON_IP,
> +	ETH_RSS_ETH};
> 
>  /* Supported pattern for os default package. */  static struct ice_pattern_match_item ice_hash_pattern_list_os[] = { @@ -444,6
> +447,8 @@ static struct ice_pattern_match_item ice_hash_pattern_list_comms[] = {
>  		&hint_eth_pppoes_ipv6_tcp},
>  	{pattern_eth_pppoes,		    ICE_INSET_NONE,
>  		&hint_eth_pppoes},
> +	{pattern_ethertype,		    ICE_INSET_NONE,
> +		&hint_ethertype},
>  };
> 
>  /**
> @@ -1140,6 +1145,15 @@ ice_hash_parse_action(struct ice_pattern_match_item *pattern_match_item,
>  					"Not supported flow");
>  			}
> 
> +			/* update hash field for eth-non-ip. */
> +			if (rss_type & ETH_RSS_ETH) {
> +				if (hash_meta->pkt_hdr &
> +				    ICE_FLOW_SEG_HDR_ETH_NON_IP) {
> +					hash_meta->hash_flds |=
> +					BIT_ULL(ICE_FLOW_FIELD_IDX_ETH_TYPE);
> +				}
> +			}
> +
>  			/* update hash field for nat-t esp. */
>  			if (rss_type & ETH_RSS_ESP &&
>  			    (m->eth_rss_hint & ETH_RSS_NONFRAG_IPV4_UDP ||
> --
> 2.25.1