[PATCH v2 3/3] usertools/rss: add CNXK well-known key

[Robin Jarry <rjarry@redhat.com>]

Add default RSS key for CNXK platforms. CNXK platform uses 48 bytes long
key for hash calculations and a default RETA size of 64.

Example:

  ~$ usertools/dpdk-rss-flows.py 8 28.0.0.0/24 40.0.0.0/24 -k cnxk
  SRC_IP      DST_IP       QUEUE
  28.0.0.1    40.0.0.1     7
  28.0.0.1    40.0.0.2     2
  28.0.0.1    40.0.0.3     4
  28.0.0.1    40.0.0.7     1
  28.0.0.1    40.0.0.8     3
  28.0.0.1    40.0.0.9     5
  28.0.0.1    40.0.0.10    0
  28.0.0.1    40.0.0.11    6

Co-authored-by: Sunil Kumar Kori <skori@marvell.com>
Signed-off-by: Robin Jarry <rjarry@redhat.com>
---
 usertools/dpdk-rss-flows.py | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/usertools/dpdk-rss-flows.py b/usertools/dpdk-rss-flows.py
index fd225a697f08..be9b3d760c03 100755
--- a/usertools/dpdk-rss-flows.py
+++ b/usertools/dpdk-rss-flows.py
@@ -226,6 +226,23 @@ def reta_size(self, num_queues: int) -> int:
         ),
         reta_size=512,
     ),
+    "cnxk": DriverInfo(
+        key=bytes(
+            (
+                # fmt: off
+                # roc_nix_rss_key_default_fill, see drivers/common/cnxk/roc_nix_rss.c
+                # Marvell's cnxk NICs take 48 bytes keys
+                0xfe, 0xed, 0x0b, 0xad, 0xfe, 0xed, 0x0b, 0xad,
+                0xfe, 0xed, 0x0b, 0xad, 0xfe, 0xed, 0x0b, 0xad,
+                0xfe, 0xed, 0x0b, 0xad, 0xfe, 0xed, 0x0b, 0xad,
+                0xfe, 0xed, 0x0b, 0xad, 0xfe, 0xed, 0x0b, 0xad,
+                0xfe, 0xed, 0x0b, 0xad, 0xfe, 0xed, 0x0b, 0xad,
+                0xfe, 0xed, 0x0b, 0xad, 0xfe, 0xed, 0x0b, 0xad,
+                # fmt: on
+            )
+        ),
+        reta_size=64,
+    ),
 }
 
 
-- 
2.42.0