[PATCH v7 7/7] net/ice: add L2TPv2 RSS hash support

[Shaiq Wani <shaiq.wani@intel.com>]

Add RSS (Receive Side Scaling) hash support for L2TPv2 packets.
Add L2TPv2 over UDP support for ice PMD in the release notes.

Signed-off-by: Shaiq Wani <shaiq.wani@intel.com>
Tested-by: Song Jiale <songx.jiale@intel.com>
---
 doc/guides/rel_notes/release_26_03.rst |  4 ++++
 drivers/net/intel/ice/ice_hash.c       | 25 +++++++++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/doc/guides/rel_notes/release_26_03.rst b/doc/guides/rel_notes/release_26_03.rst
index b4499ec066..8ae46e78e7 100644
--- a/doc/guides/rel_notes/release_26_03.rst
+++ b/doc/guides/rel_notes/release_26_03.rst
@@ -77,6 +77,10 @@ New Features
 
   * Added support for pre and post VF reset callbacks.
 
+* **Updated Intel ice driver.**
+
+  * Added rte_flow support for L2TPv2 over UDP.
+
 * **Updated Marvell cnxk net driver.**
 
   * Added out-of-place support for CN20K SoC.
diff --git a/drivers/net/intel/ice/ice_hash.c b/drivers/net/intel/ice/ice_hash.c
index afdc8f220a..b20103a452 100644
--- a/drivers/net/intel/ice/ice_hash.c
+++ b/drivers/net/intel/ice/ice_hash.c
@@ -305,6 +305,22 @@ struct ice_rss_hash_cfg eth_ipv4_l2tpv3_tmplt = {
 	0
 };
 
+struct ice_rss_hash_cfg eth_ipv4_l2tpv2_tmplt = {
+	ICE_FLOW_SEG_HDR_IPV4 | ICE_FLOW_SEG_HDR_IPV_OTHER |
+	ICE_FLOW_SEG_HDR_L2TPV2,
+	ICE_FLOW_HASH_L2TPV2_SESS_ID,
+	ICE_RSS_OUTER_HEADERS,
+	0
+};
+
+struct ice_rss_hash_cfg eth_ipv6_l2tpv2_tmplt = {
+	ICE_FLOW_SEG_HDR_IPV6 | ICE_FLOW_SEG_HDR_IPV_OTHER |
+	ICE_FLOW_SEG_HDR_L2TPV2,
+	ICE_FLOW_HASH_L2TPV2_SESS_ID,
+	ICE_RSS_OUTER_HEADERS,
+	0
+};
+
 struct ice_rss_hash_cfg eth_ipv4_pfcp_tmplt = {
 	ICE_FLOW_SEG_HDR_IPV4 | ICE_FLOW_SEG_HDR_IPV_OTHER |
 	ICE_FLOW_SEG_HDR_PFCP_SESSION,
@@ -480,6 +496,8 @@ struct ice_rss_hash_cfg eth_tmplt = {
 #define ICE_RSS_TYPE_IPV6_AH		(RTE_ETH_RSS_AH | RTE_ETH_RSS_IPV6)
 #define ICE_RSS_TYPE_IPV4_L2TPV3	(RTE_ETH_RSS_L2TPV3 | RTE_ETH_RSS_IPV4)
 #define ICE_RSS_TYPE_IPV6_L2TPV3	(RTE_ETH_RSS_L2TPV3 | RTE_ETH_RSS_IPV6)
+#define ICE_RSS_TYPE_IPV4_L2TPV2	(RTE_ETH_RSS_L2TPV2 | RTE_ETH_RSS_IPV4)
+#define ICE_RSS_TYPE_IPV6_L2TPV2	(RTE_ETH_RSS_L2TPV2 | RTE_ETH_RSS_IPV6)
 #define ICE_RSS_TYPE_IPV4_PFCP		(RTE_ETH_RSS_PFCP | RTE_ETH_RSS_IPV4)
 #define ICE_RSS_TYPE_IPV6_PFCP		(RTE_ETH_RSS_PFCP | RTE_ETH_RSS_IPV6)
 
@@ -522,6 +540,8 @@ static struct ice_pattern_match_item ice_hash_pattern_list[] = {
 	{pattern_eth_ipv4_udp_esp,		ICE_RSS_TYPE_IPV4_ESP,		ICE_INSET_NONE,	&eth_ipv4_udp_esp_tmplt},
 	{pattern_eth_ipv4_ah,			ICE_RSS_TYPE_IPV4_AH,		ICE_INSET_NONE,	&eth_ipv4_ah_tmplt},
 	{pattern_eth_ipv4_l2tp,			ICE_RSS_TYPE_IPV4_L2TPV3,	ICE_INSET_NONE,	&eth_ipv4_l2tpv3_tmplt},
+	{pattern_eth_ipv4_l2tpv2,		ICE_RSS_TYPE_IPV4_L2TPV2,	ICE_INSET_NONE,	&eth_ipv4_l2tpv2_tmplt},
+	{pattern_eth_ipv6_l2tpv2,		ICE_RSS_TYPE_IPV6_L2TPV2,	ICE_INSET_NONE,	&eth_ipv6_l2tpv2_tmplt},
 	{pattern_eth_ipv4_pfcp,			ICE_RSS_TYPE_IPV4_PFCP,		ICE_INSET_NONE,	&eth_ipv4_pfcp_tmplt},
 	/* IPV6 */
 	{pattern_eth_ipv6,			ICE_RSS_TYPE_ETH_IPV6,		ICE_INSET_NONE,	&ipv6_tmplt},
@@ -925,6 +945,11 @@ ice_refine_hash_cfg_l234(struct ice_rss_hash_cfg *hash_cfg,
 			*hash_flds &= ~ICE_FLOW_HASH_L2TPV3_SESS_ID;
 	}
 
+	if (*addl_hdrs & ICE_FLOW_SEG_HDR_L2TPV2) {
+		if (!(rss_type & RTE_ETH_RSS_L2TPV2))
+			*hash_flds &= ~ICE_FLOW_HASH_L2TPV2_SESS_ID;
+	}
+
 	if (*addl_hdrs & ICE_FLOW_SEG_HDR_ESP) {
 		if (!(rss_type & RTE_ETH_RSS_ESP))
 			*hash_flds &= ~ICE_FLOW_HASH_ESP_SPI;
-- 
2.34.1