[PATCH v7 1/2] ethdev: support RSS based on RoCEv2 header

[kirankumark at marvell.com]

From: Kiran Kumar K <kirankumark at marvell.com>

On supporting hardware, RoCEv2 header can be used to
perform RSS in the ingress path.

Signed-off-by: Kiran Kumar K <kirankumark at marvell.com>
---
V7 Changes;
* Addressed review comments related to rss_type_table.
 app/test-pmd/config.c                  |  4 +++-
 doc/guides/rel_notes/release_25_07.rst | 32 +++-----------------------
 lib/ethdev/rte_ethdev.h                |  2 ++
 3 files changed, 8 insertions(+), 30 deletions(-)

diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index e89af21cec..5cc82a68aa 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -92,7 +92,8 @@ const struct rss_type_info rss_type_table[] = {
 	{ "all", RTE_ETH_RSS_ETH | RTE_ETH_RSS_VLAN | RTE_ETH_RSS_IP | RTE_ETH_RSS_TCP |
 		RTE_ETH_RSS_UDP | RTE_ETH_RSS_SCTP | RTE_ETH_RSS_L2_PAYLOAD |
 		RTE_ETH_RSS_L2TPV3 | RTE_ETH_RSS_ESP | RTE_ETH_RSS_AH | RTE_ETH_RSS_PFCP |
-		RTE_ETH_RSS_GTPU | RTE_ETH_RSS_ECPRI | RTE_ETH_RSS_MPLS | RTE_ETH_RSS_L2TPV2},
+		RTE_ETH_RSS_GTPU | RTE_ETH_RSS_ECPRI | RTE_ETH_RSS_MPLS | RTE_ETH_RSS_L2TPV2 |
+	        RTE_ETH_RSS_IB_BTH},
 	{ "none", 0 },
 	{ "ip", RTE_ETH_RSS_IP },
 	{ "udp", RTE_ETH_RSS_UDP },
@@ -149,6 +150,7 @@ const struct rss_type_info rss_type_table[] = {
 	{ "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 },
+	{ "ib-bth", RTE_ETH_RSS_IB_BTH },
 	{ NULL, 0},
 };

diff --git a/doc/guides/rel_notes/release_25_07.rst b/doc/guides/rel_notes/release_25_07.rst
index 6b070801de..6f72293fd1 100644
--- a/doc/guides/rel_notes/release_25_07.rst
+++ b/doc/guides/rel_notes/release_25_07.rst
@@ -24,36 +24,10 @@ DPDK Release 25.07
 New Features
 ------------

-.. This section should contain new features added in this release.
-   Sample format:
+* **Added new RSS offload types for IB_BTH in RSS flow.**

-   * **Add a title in the past tense with a full stop.**
-
-     Add a short 1-2 sentence description in the past tense.
-     The description should be enough to allow someone scanning
-     the release notes to understand the new feature.
-
-     If the feature adds a lot of sub-features you can use a bullet list
-     like this:
-
-     * Added feature foo to do something.
-     * Enhanced feature bar to do something else.
-
-     Refer to the previous release notes for examples.
-
-     Suggested order in release notes items:
-     * Core libs (EAL, mempool, ring, mbuf, buses)
-     * Device abstraction libs and PMDs (ordered alphabetically by vendor name)
-       - ethdev (lib, PMDs)
-       - cryptodev (lib, PMDs)
-       - eventdev (lib, PMDs)
-       - etc
-     * Other libs
-     * Apps, Examples, Tools (if significant)
-
-     This section is a comment. Do not overwrite or remove it.
-     Also, make sure to start the actual text at the margin.
-     =======================================================
+  Added ``RTE_ETH_RSS_IB_BTH`` macro so that the RoCE Infiniband base transport header
+  can be used as input set for RSS.

 * **Added burst mode query function to Intel drivers.**

diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
index ea7f8c4a1a..8e0c89581e 100644
--- a/lib/ethdev/rte_ethdev.h
+++ b/lib/ethdev/rte_ethdev.h
@@ -602,6 +602,8 @@ struct rte_eth_rss_conf {

 #define RTE_ETH_RSS_L2TPV2             RTE_BIT64(36)
 #define RTE_ETH_RSS_IPV6_FLOW_LABEL    RTE_BIT64(37)
+/** RoCE InfiniBand Base Transport Header */
+#define RTE_ETH_RSS_IB_BTH RTE_BIT64(38)

 /*
  * We use the following macros to combine with above RTE_ETH_RSS_* for
--
2.48.1