[PATCH v3] ethdev: add support for RSS based on IPv6 flow label

[Ajit Khaparde <ajit.khaparde@broadcom.com>]

[-- Attachment #1: Type: text/plain, Size: 5182 bytes --]

On supporting hardware, the 20-bit Flow Label field in the
IPv6 header can be used to perform RSS in the ingress path.

Flow label values can be chosen such that they can be
used as part of the input to a hash function used in a load
distribution scheme.

Example to configure IPv6 flow label based RSS:
flow create 0 ingress pattern eth / ipv6 / tcp / end actions rss types ipv6-flow-label end / end

Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
---
v1->v2: Merge ethdev and testpmd patches into one patch
v2->v3: Update testpmd documentation
---
 app/test-pmd/cmdline.c                      | 8 ++++----
 app/test-pmd/config.c                       | 1 +
 doc/guides/testpmd_app_ug/testpmd_funcs.rst | 2 +-
 lib/ethdev/rte_ethdev.h                     | 1 +
 4 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index d8ea2b76e6..ced4a762fc 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -715,7 +715,7 @@ static void cmd_help_long_parsed(void *parsed_result,
 			"port config all rss (all|default|level-default|level-outer|level-inner|"
 			"ip|tcp|udp|sctp|tunnel|vlan|none|"
 			"ipv4|ipv4-frag|ipv4-tcp|ipv4-udp|ipv4-sctp|ipv4-other|"
-			"ipv6|ipv6-frag|ipv6-tcp|ipv6-udp|ipv6-sctp|ipv6-other|ipv6-ex|ipv6-tcp-ex|ipv6-udp-ex|"
+			"ipv6|ipv6-frag|ipv6-tcp|ipv6-udp|ipv6-sctp|ipv6-other|ipv6-ex|ipv6-tcp-ex|ipv6-udp-ex|ipv6-flow-label|"
 			"l2-payload|port|vxlan|geneve|nvgre|gtpu|eth|s-vlan|c-vlan|"
 			"esp|ah|l2tpv3|pfcp|pppoe|ecpri|mpls|ipv4-chksum|l4-chksum|"
 			"l2tpv2|l3-pre96|l3-pre64|l3-pre56|l3-pre48|l3-pre40|l3-pre32|"
@@ -2133,7 +2133,7 @@ static cmdline_parse_inst_t cmd_config_rss = {
 		"all|default|level-default|level-outer|level-inner|"
 		"ip|tcp|udp|sctp|tunnel|vlan|none|"
 		"ipv4|ipv4-frag|ipv4-tcp|ipv4-udp|ipv4-sctp|ipv4-other|"
-		"ipv6|ipv6-frag|ipv6-tcp|ipv6-udp|ipv6-sctp|ipv6-other|ipv6-ex|ipv6-tcp-ex|ipv6-udp-ex|"
+		"ipv6|ipv6-frag|ipv6-tcp|ipv6-udp|ipv6-sctp|ipv6-other|ipv6-ex|ipv6-tcp-ex|ipv6-udp-ex|ipv6-flow-label|"
 		"l2-payload|port|vxlan|geneve|nvgre|gtpu|eth|s-vlan|c-vlan|"
 		"esp|ah|l2tpv3|pfcp|pppoe|ecpri|mpls|ipv4-chksum|l4-chksum|"
 		"l2tpv2|l3-pre96|l3-pre64|l3-pre56|l3-pre48|l3-pre40|l3-pre32|"
@@ -2249,7 +2249,7 @@ static cmdline_parse_token_string_t cmd_config_rss_hash_key_rss_type =
 				 "ipv4#ipv4-frag#ipv4-tcp#ipv4-udp#ipv4-sctp#"
 				 "ipv4-other#ipv6#ipv6-frag#ipv6-tcp#ipv6-udp#"
 				 "ipv6-sctp#ipv6-other#l2-payload#ipv6-ex#"
-				 "ipv6-tcp-ex#ipv6-udp-ex#"
+				 "ipv6-tcp-ex#ipv6-udp-ex#ipv6-flow-label#"
 				 "l3-src-only#l3-dst-only#l4-src-only#l4-dst-only#"
 				 "l2-src-only#l2-dst-only#s-vlan#c-vlan#"
 				 "l2tpv3#esp#ah#pfcp#pppoe#gtpu#ecpri#mpls#l2tpv2");
@@ -2262,7 +2262,7 @@ static cmdline_parse_inst_t cmd_config_rss_hash_key = {
 	.help_str = "port config <port_id> rss-hash-key "
 		"ipv4|ipv4-frag|ipv4-tcp|ipv4-udp|ipv4-sctp|ipv4-other|"
 		"ipv6|ipv6-frag|ipv6-tcp|ipv6-udp|ipv6-sctp|ipv6-other|"
-		"l2-payload|ipv6-ex|ipv6-tcp-ex|ipv6-udp-ex|"
+		"l2-payload|ipv6-ex|ipv6-tcp-ex|ipv6-udp-ex|ipv6-flow-label|"
 		"l3-src-only|l3-dst-only|l4-src-only|l4-dst-only|"
 		"l2-src-only|l2-dst-only|s-vlan|c-vlan|"
 		"l2tpv3|esp|ah|pfcp|pppoe|gtpu|ecpri|mpls|l2tpv2 "
diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index 2c4dedd603..3c5c5bac67 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -148,6 +148,7 @@ const struct rss_type_info rss_type_table[] = {
 	{ "l4-src-only", RTE_ETH_RSS_L4_SRC_ONLY },
 	{ "l3-dst-only", RTE_ETH_RSS_L3_DST_ONLY },
 	{ "l3-src-only", RTE_ETH_RSS_L3_SRC_ONLY },
+	{ "ipv6-flow-label", RTE_ETH_RSS_IPV6_FLOW_LABEL },
 	{ NULL, 0},
 };
 
diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index 468f70b79b..917d01dd4f 100644
--- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
+++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
@@ -2114,7 +2114,7 @@ Set the RSS (Receive Side Scaling) mode on or off::
                                  ip|tcp|udp|sctp|tunnel|vlan|none| \
                                  ipv4|ipv4-frag|ipv4-tcp|ipv4-udp|ipv4-sctp|ipv4-other| \
                                  ipv6|ipv6-frag|ipv6-tcp|ipv6-udp|ipv6-sctp| \
-                                 ipv6-other|ipv6-ex|ipv6-tcp-ex|ipv6-udp-ex| \
+                                 ipv6-other|ipv6-ex|ipv6-tcp-ex|ipv6-udp-ex|ipv6-flow-label| \
                                  l2-payload|port|vxlan|geneve|nvgre|gtpu|eth|s-vlan|c-vlan| \
                                  esp|ah|l2tpv3|pfcp|pppoe|ecpri|mpls|ipv4-chksum|l4-chksum| \
                                  l2tpv2|l3-pre96|l3-pre64|l3-pre56|l3-pre48|l3-pre40|l3-pre32| \
diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
index 2687c23fa6..75a3f5f2c7 100644
--- a/lib/ethdev/rte_ethdev.h
+++ b/lib/ethdev/rte_ethdev.h
@@ -587,6 +587,7 @@ struct rte_eth_rss_conf {
 #define RTE_ETH_RSS_L4_CHKSUM          RTE_BIT64(35)
 
 #define RTE_ETH_RSS_L2TPV2             RTE_BIT64(36)
+#define RTE_ETH_RSS_IPV6_FLOW_LABEL    RTE_BIT64(37)
 
 /*
  * We use the following macros to combine with above RTE_ETH_RSS_* for
-- 
2.39.2 (Apple Git-143)


[-- Attachment #2: S/MIME Cryptographic Signature --]
[-- Type: application/pkcs7-signature, Size: 4218 bytes --]