[PATCH] ethdev: support RSS based on RoCEv2 header

[PATCH] ethdev: support RSS based on RoCEv2 header

[kirankumark]

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

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

Signed-off-by: Kiran Kumar K <kirankumark@marvell.com>
---
 app/test-pmd/config.c   | 4 +++-
 lib/ethdev/rte_ethdev.h | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index e89af21cec..b6c7f032b0 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_ROCEV2},
 	{ "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 },
+	{ "rocev2", RTE_ETH_RSS_ROCEV2},
 	{ NULL, 0},
 };
 
diff --git a/lib/ethdev/rte_ethdev.h b/lib/ethdev/rte_ethdev.h
index ea7f8c4a1a..e29a3c876d 100644
--- a/lib/ethdev/rte_ethdev.h
+++ b/lib/ethdev/rte_ethdev.h
@@ -602,6 +602,7 @@ struct rte_eth_rss_conf {
 
 #define RTE_ETH_RSS_L2TPV2             RTE_BIT64(36)
 #define RTE_ETH_RSS_IPV6_FLOW_LABEL    RTE_BIT64(37)
+#define RTE_ETH_RSS_ROCEV2    RTE_BIT64(38)
 
 /*
  * We use the following macros to combine with above RTE_ETH_RSS_* for
-- 
2.48.1

Re: [PATCH] ethdev: support RSS based on RoCEv2 header

[Thomas Monjalon]

22/04/2025 07:14, kirankumark@marvell.com:
> From: Kiran Kumar K <kirankumark@marvell.com>
> 
> On supporting hardware, RoCEv2 header can be used to
> perform RSS in the ingress path.

Do you mean IB BTH?
It would be good to adopt a unique name between RSS and flow matching:
	RTE_FLOW_ITEM_TYPE_IB_BTH

Re: [PATCH] ethdev: support RSS based on RoCEv2 header

[Stephen Hemminger]

On Tue, 22 Apr 2025 10:44:59 +0530
<kirankumark@marvell.com> wrote:

> From: <kirankumark@marvell.com>
> To: Aman Singh <aman.deep.singh@intel.com>, Thomas Monjalon <thomas@monjalon.net>, Ferruh Yigit <ferruh.yigit@amd.com>, Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
> CC: <dev@dpdk.org>, Kiran Kumar K <kirankumark@marvell.com>
> Subject: [PATCH] ethdev: support RSS based on RoCEv2 header
> Date: Tue, 22 Apr 2025 10:44:59 +0530
> X-Mailer: git-send-email 2.48.1
> 
> From: Kiran Kumar K <kirankumark@marvell.com>
> 
> On supporting hardware, RoCEv2 header can be used to
> perform RSS in the ingress path.
> 
> Signed-off-by: Kiran Kumar K <kirankumark@marvell.com>
> ---

Please make this patch part of a series with hardware support on some device.
Not going to add it unless at least one in tree PMD supports it.
Also, you need to add a release note for this, and include documentation for the 
device in question.