From: Simei Su <simei.su@intel.com>
Date: Tue, 1 Oct 2019 09:22:12 +0000 (+0800)
Subject: ethdev: add symmetric Toeplitz hash
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=d172886440996b13ac0d681379fff8fc11873506;p=dpdk.git

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 3d2423e629..391a44a576 100644
--- 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,
 };