ethdev: add IPv4 and L4 checksum RSS offload types

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: Qi Zhang <qi.z.zhang@intel.com>
Acked-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Acked-by: Aman Deep Singh <aman.deep.singh@intel.com>
Acked-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
index 7dd3965..a9efd02 100644 (file)
--- a/app/test-pmd/cmdline.c
+++ b/app/test-pmd/cmdline.c
@@ -2252,6 +2252,8 @@ cmd_config_rss_parsed(void *parsed_result,
                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")) {
@@ -2323,7 +2325,7 @@ cmdline_parse_inst_t 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|<flowtype_id>",
        .tokens = {
                (void *)&cmd_config_rss_port,
                (void *)&cmd_config_rss_keyword,

diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index f5765b3..9c66329 100644 (file)
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -140,6 +140,8 @@ const struct rss_type_info rss_type_table[] = {
        { "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/doc/guides/rel_notes/release_21_11.rst b/doc/guides/rel_notes/release_21_11.rst
index f85dc99..568577c 100644 (file)
--- a/doc/guides/rel_notes/release_21_11.rst
+++ b/doc/guides/rel_notes/release_21_11.rst
@@ -62,6 +62,11 @@ New Features
   * Added bus-level parsing of the devargs syntax.
   * Kept compatibility with the legacy syntax as parsing fallback.
 
+* **Added new RSS offload types for IPv4/L4 checksum in RSS flow.**
+
+  Added macros ETH_RSS_IPV4_CHKSUM and ETH_RSS_L4_CHKSUM, now IPv4 and
+  TCP/UDP/SCTP header checksum field can be used as input set for RSS.
+
 * **Updated Marvell cnxk ethdev driver.**
 
   * Added rte_flow support for dual VLAN insert and strip actions.

diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
index bef2417..3c8af31 100644 (file)
--- a/lib/ethdev/rte_ethdev.h
+++ b/lib/ethdev/rte_ethdev.h
@@ -537,6 +537,21 @@ 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)
+
+/**
+ * The ETH_RSS_L4_CHKSUM works on checksum field of any L4 header.
+ * It is similar to ETH_RSS_PORT that they don't specify the specific type of
+ * L4 header. This macro is defined to replace some specific L4 (TCP/UDP/SCTP)
+ * checksum type for constructing the use of RSS offload bits.
+ *
+ * Due to above reason, some old APIs (and configuration) don't support
+ * ETH_RSS_L4_CHKSUM. The rte_flow RSS API supports it.
+ *
+ * For the case that checksum is not used in an UDP header,
+ * it takes the reserved value 0 as input for the hash function.
+ */
+#define ETH_RSS_L4_CHKSUM          (1ULL << 35)
 
 /*
  * We use the following macros to combine with above ETH_RSS_* for