[dpdk-dev] [PATCH v4] ethdev: add IPv4 and L4 checksum RSS offload types

[Alvin Zhang <alvinx.zhang@intel.com>]

This patch defines new RSS offload types for IPv4 and
L4(TCP/UDP/SCTP) checksum, which are required when users want
to distribute packets based on the IPv4 or L4 checksum field.

For example "flow create 0 ingress pattern eth / ipv4 / end
actions rss types ipv4-chksum end queues end / end", this flow
causes all matching packets to be distributed to queues on
basis of IPv4 checksum.

Signed-off-by: Alvin Zhang <alvinx.zhang@intel.com>
Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Acked-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Acked-by: Aman Deep Singh <aman.deep.singh@intel.com>
---

v3: Add L4 checksum RSS offload type
v4: Add doc and help string, update commit log
---
 app/test-pmd/cmdline.c  | 12 +++++++++---
 app/test-pmd/config.c   |  2 ++
 lib/ethdev/rte_ethdev.h |  2 ++
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index 0268b18..93543d8 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -2254,6 +2254,10 @@ struct cmd_config_rss {
 		rss_conf.rss_hf = ETH_RSS_ECPRI;
 	else if (!strcmp(res->value, "mpls"))
 		rss_conf.rss_hf = ETH_RSS_MPLS;
+	else if (!strcmp(res->value, "ipv4-chksum"))
+		rss_conf.rss_hf = ETH_RSS_IPV4_CHKSUM;
+	else if (!strcmp(res->value, "l4-chksum"))
+		rss_conf.rss_hf = ETH_RSS_L4_CHKSUM;
 	else if (!strcmp(res->value, "none"))
 		rss_conf.rss_hf = 0;
 	else if (!strcmp(res->value, "level-default")) {
@@ -2325,7 +2329,7 @@ struct cmd_config_rss {
 	.help_str = "port config all rss "
 		"all|default|eth|vlan|ip|tcp|udp|sctp|ether|port|vxlan|geneve|"
 		"nvgre|vxlan-gpe|l2tpv3|esp|ah|pfcp|ecpri|mpls|none|level-default|"
-		"level-outer|level-inner|<flowtype_id>",
+		"level-outer|level-inner|ipv4-chksum|l4-chksum|<flowtype_id>",
 	.tokens = {
 		(void *)&cmd_config_rss_port,
 		(void *)&cmd_config_rss_keyword,
@@ -2438,7 +2442,8 @@ struct cmd_config_rss_hash_key {
 				 "ipv6-tcp-ex#ipv6-udp-ex#"
 				 "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");
+				 "l2tpv3#esp#ah#pfcp#pppoe#gtpu#ecpri#mpls#"
+				 "ipv4-chksum#l4-chksum");
 cmdline_parse_token_string_t cmd_config_rss_hash_key_value =
 	TOKEN_STRING_INITIALIZER(struct cmd_config_rss_hash_key, key, NULL);
 
@@ -2451,7 +2456,8 @@ struct cmd_config_rss_hash_key {
 		"l2-payload|ipv6-ex|ipv6-tcp-ex|ipv6-udp-ex|"
 		"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 "
+		"l2tpv3|esp|ah|pfcp|pppoe|gtpu|ecpri|mpls|"
+		"ipv4-chksum|l4-chksum "
 		"<string of hex digits (variable length, NIC dependent)>",
 	.tokens = {
 		(void *)&cmd_config_rss_hash_key_port,
diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index 43c79b5..14968bf 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -140,6 +140,8 @@
 	{ "gtpu", ETH_RSS_GTPU },
 	{ "ecpri", ETH_RSS_ECPRI },
 	{ "mpls", ETH_RSS_MPLS },
+	{ "ipv4-chksum", ETH_RSS_IPV4_CHKSUM },
+	{ "l4-chksum", ETH_RSS_L4_CHKSUM },
 	{ NULL, 0 },
 };
 
diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
index faf3bd9..63b0321 100644
--- a/lib/ethdev/rte_ethdev.h
+++ b/lib/ethdev/rte_ethdev.h
@@ -537,6 +537,8 @@ struct rte_eth_rss_conf {
 #define ETH_RSS_PPPOE		   (1ULL << 31)
 #define ETH_RSS_ECPRI		   (1ULL << 32)
 #define ETH_RSS_MPLS		   (1ULL << 33)
+#define ETH_RSS_IPV4_CHKSUM	   (1ULL << 34)
+#define ETH_RSS_L4_CHKSUM	   (1ULL << 35)	/* TCP/UDP/SCTP */
 
 /*
  * We use the following macros to combine with above ETH_RSS_* for
-- 
1.8.3.1