netdev - [patch net-next 7/8] mlxsw: spectrum: Increase number of linear entries

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Date:   Sun, 22 Oct 2017 23:11:49 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, idosch@...lanox.com, mlxsw@...lanox.com
Subject: [patch net-next 7/8] mlxsw: spectrum: Increase number of linear entries

From: Ido Schimmel <idosch@...lanox.com>

The memory region where adjacency entries (nexthops) are stored is
called the KVD linear and is configured during initialization with a
size of 64K.

Extend this area with 32K more entries, that will be partitioned into 64
groups of 0.5K entries, thereby allowing us to support weighted nexthops
with high accuracy.

Change the ratio between both types of hash entries, so as to prevent
reduction in the number of double hash entries, which are used for IPv6
neighbours and routes with a prefix length greater than 64.

Note that the user will be able to control all these sizes once the
devlink resource manager is introduced.

Signed-off-by: Ido Schimmel <idosch@...lanox.com>
Signed-off-by: Jiri Pirko <jiri@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 4 ++--
 drivers/net/ethernet/mellanox/mlxsw/spectrum.h | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index 1bc3fc3..12b6ac4 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -3885,8 +3885,8 @@ static const struct mlxsw_config_profile mlxsw_sp_config_profile = {
 	.max_pkey			= 0,
 	.used_kvd_split_data		= 1,
 	.kvd_hash_granularity		= MLXSW_SP_KVD_GRANULARITY,
-	.kvd_hash_single_parts		= 2,
-	.kvd_hash_double_parts		= 1,
+	.kvd_hash_single_parts		= 59,
+	.kvd_hash_double_parts		= 41,
 	.kvd_linear_size		= MLXSW_SP_KVD_LINEAR_SIZE,
 	.swid_config			= {
 		{
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
index 78ff20d..dc1b739 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -62,7 +62,7 @@
 
 #define MLXSW_SP_PORT_BASE_SPEED 25000	/* Mb/s */
 
-#define MLXSW_SP_KVD_LINEAR_SIZE 65536 /* entries */
+#define MLXSW_SP_KVD_LINEAR_SIZE 98304 /* entries */
 #define MLXSW_SP_KVD_GRANULARITY 128
 
 struct mlxsw_sp_port;
-- 
2.9.5