[dpdk-dev] [PATCH v2] ethdev: add IPv4 checksum RSS offload type

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

This patch defines new RSS offload type for IPv4 checksum,
which is required when users want to distribute packets based
on the IPv4 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>
---
 app/test-pmd/cmdline.c  | 2 ++
 app/test-pmd/config.c   | 1 +
 lib/ethdev/rte_ethdev.h | 1 +
 3 files changed, 4 insertions(+)

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index 0268b18..32da066 100644
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -2254,6 +2254,8 @@ 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, "none"))
 		rss_conf.rss_hf = 0;
 	else if (!strcmp(res->value, "level-default")) {
diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index 43c79b5..2c0c415 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -140,6 +140,7 @@
 	{ "gtpu", ETH_RSS_GTPU },
 	{ "ecpri", ETH_RSS_ECPRI },
 	{ "mpls", ETH_RSS_MPLS },
+	{ "ipv4-chksum", ETH_RSS_IPV4_CHKSUM },
 	{ NULL, 0 },
 };
 
diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
index faf3bd9..f10d834 100644
--- a/lib/ethdev/rte_ethdev.h
+++ b/lib/ethdev/rte_ethdev.h
@@ -537,6 +537,7 @@ 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)
 
 /*
  * We use the following macros to combine with above ETH_RSS_* for
-- 
1.8.3.1