ethdev: add symmetric Toeplitz hash

Currently, there are DEFAULT,TOEPLITZ and SIMPLE_XOR hash function.
To support symmetric hash by rte_flow RSS action, this patch adds
new hash function "Symmetric Toeplitz" which is supported by some hardware.

Signed-off-by: Simei Su <simei.su@intel.com>
Reviewed-by: Qi Zhang <qi.z.zhang@intel.com>
Acked-by: Ori Kam <orika@mellanox.com>
Acked-by: Andrew Rybchenko <arybchenko@solarflare.com>

diff --git a/lib/librte_ethdev/rte_flow.h b/lib/librte_ethdev/rte_flow.h
index 3d2423e..391a44a 100644 (file)
--- a/lib/librte_ethdev/rte_flow.h
+++ b/lib/librte_ethdev/rte_flow.h
@@ -1907,6 +1907,12 @@ enum rte_eth_hash_function {
        RTE_ETH_HASH_FUNCTION_DEFAULT = 0,
        RTE_ETH_HASH_FUNCTION_TOEPLITZ, /**< Toeplitz */
        RTE_ETH_HASH_FUNCTION_SIMPLE_XOR, /**< Simple XOR */
+       /**
+        * Symmetric Toeplitz: src, dst will be replaced by
+        * xor(src, dst). For the case with src/dst only,
+        * src or dst address will xor with zero pair.
+        */
+       RTE_ETH_HASH_FUNCTION_SYMMETRIC_TOEPLITZ,
        RTE_ETH_HASH_FUNCTION_MAX,
 };