iavf: add RSS support for GTP protocol via ethtool

Extend the iavf driver to support Receive Side Scaling (RSS)
configuration for GTP (GPRS Tunneling Protocol) flows using ethtool.

The implementation introduces new RSS flow segment headers and hash field
definitions for various GTP encapsulations, including:

  - GTPC
  - GTPU (IP, Extension Header, Uplink, Downlink)
  - TEID-based hashing

The ethtool interface is updated to parse and apply these new flow types
and hash fields, enabling fine-grained traffic distribution for GTP-based
mobile workloads.

This enhancement improves performance and scalability for virtualized
network functions (VNFs) and user plane functions (UPFs) in 5G and LTE
deployments.

Reviewed-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/iavf/iavf_adv_rss.h b/drivers/net/ethernet/intel/iavf/iavf_adv_rss.h
index e31eb2afebea..74cc9e0d528c 100644
--- a/drivers/net/ethernet/intel/iavf/iavf_adv_rss.h
+++ b/drivers/net/ethernet/intel/iavf/iavf_adv_rss.h
@@ -22,6 +22,12 @@ enum iavf_adv_rss_flow_seg_hdr {
 	IAVF_ADV_RSS_FLOW_SEG_HDR_TCP	= 0x00000004,
 	IAVF_ADV_RSS_FLOW_SEG_HDR_UDP	= 0x00000008,
 	IAVF_ADV_RSS_FLOW_SEG_HDR_SCTP	= 0x00000010,
+	IAVF_ADV_RSS_FLOW_SEG_HDR_GTPC		= 0x00000400,
+	IAVF_ADV_RSS_FLOW_SEG_HDR_GTPC_TEID	= 0x00000800,
+	IAVF_ADV_RSS_FLOW_SEG_HDR_GTPU_IP	= 0x00001000,
+	IAVF_ADV_RSS_FLOW_SEG_HDR_GTPU_EH	= 0x00002000,
+	IAVF_ADV_RSS_FLOW_SEG_HDR_GTPU_DWN	= 0x00004000,
+	IAVF_ADV_RSS_FLOW_SEG_HDR_GTPU_UP	= 0x00008000,
 };
 
 #define IAVF_ADV_RSS_FLOW_SEG_HDR_L3		\
@@ -33,6 +39,14 @@ enum iavf_adv_rss_flow_seg_hdr {
 	 IAVF_ADV_RSS_FLOW_SEG_HDR_UDP |	\
 	 IAVF_ADV_RSS_FLOW_SEG_HDR_SCTP)
 
+#define IAVF_ADV_RSS_FLOW_SEG_HDR_GTP		\
+	(IAVF_ADV_RSS_FLOW_SEG_HDR_GTPC |	\
+	 IAVF_ADV_RSS_FLOW_SEG_HDR_GTPC_TEID |	\
+	 IAVF_ADV_RSS_FLOW_SEG_HDR_GTPU_IP |	\
+	 IAVF_ADV_RSS_FLOW_SEG_HDR_GTPU_EH |	\
+	 IAVF_ADV_RSS_FLOW_SEG_HDR_GTPU_DWN |	\
+	 IAVF_ADV_RSS_FLOW_SEG_HDR_GTPU_UP)
+
 enum iavf_adv_rss_flow_field {
 	/* L3 */
 	IAVF_ADV_RSS_FLOW_FIELD_IDX_IPV4_SA,
@@ -46,6 +60,17 @@ enum iavf_adv_rss_flow_field {
 	IAVF_ADV_RSS_FLOW_FIELD_IDX_UDP_DST_PORT,
 	IAVF_ADV_RSS_FLOW_FIELD_IDX_SCTP_SRC_PORT,
 	IAVF_ADV_RSS_FLOW_FIELD_IDX_SCTP_DST_PORT,
+	/* GTPC_TEID */
+	IAVF_ADV_RSS_FLOW_FIELD_IDX_GTPC_TEID,
+	/* GTPU_IP */
+	IAVF_ADV_RSS_FLOW_FIELD_IDX_GTPU_IP_TEID,
+	/* GTPU_EH */
+	IAVF_ADV_RSS_FLOW_FIELD_IDX_GTPU_EH_TEID,
+	IAVF_ADV_RSS_FLOW_FIELD_IDX_GTPU_EH_QFI,
+	/* GTPU_UP */
+	IAVF_ADV_RSS_FLOW_FIELD_IDX_GTPU_UP_TEID,
+	/* GTPU_DWN */
+	IAVF_ADV_RSS_FLOW_FIELD_IDX_GTPU_DWN_TEID,
 
 	/* The total number of enums must not exceed 64 */
 	IAVF_ADV_RSS_FLOW_FIELD_IDX_MAX
@@ -72,6 +97,12 @@ enum iavf_adv_rss_flow_field {
 	BIT_ULL(IAVF_ADV_RSS_FLOW_FIELD_IDX_SCTP_SRC_PORT)
 #define IAVF_ADV_RSS_HASH_FLD_SCTP_DST_PORT	\
 	BIT_ULL(IAVF_ADV_RSS_FLOW_FIELD_IDX_SCTP_DST_PORT)
+#define IAVF_ADV_RSS_HASH_FLD_GTPC_TEID	BIT_ULL(IAVF_ADV_RSS_FLOW_FIELD_IDX_GTPC_TEID)
+#define IAVF_ADV_RSS_HASH_FLD_GTPU_IP_TEID BIT_ULL(IAVF_ADV_RSS_FLOW_FIELD_IDX_GTPU_IP_TEID)
+#define IAVF_ADV_RSS_HASH_FLD_GTPU_EH_TEID BIT_ULL(IAVF_ADV_RSS_FLOW_FIELD_IDX_GTPU_EH_TEID)
+#define IAVF_ADV_RSS_HASH_FLD_GTPU_UP_TEID BIT_ULL(IAVF_ADV_RSS_FLOW_FIELD_IDX_GTPU_UP_TEID)
+#define IAVF_ADV_RSS_HASH_FLD_GTPU_DWN_TEID \
+	BIT_ULL(IAVF_ADV_RSS_FLOW_FIELD_IDX_GTPU_DWN_TEID)
 
 /* bookkeeping of advanced RSS configuration */
 struct iavf_adv_rss {