From: Maxim Mikityanskiy <maximmi@nvidia.com>
Date: Thu, 8 Apr 2021 12:16:34 +0300
Subject: net/mlx5e: Use a new initializer to build uniform indir table
Patch-mainline: v5.15-rc1
Git-commit: 43befe99bc62a019142f4760b3c3e29c4892565a
References: jsc#SLE-19253

Replace mlx5e_build_default_indir_rqt with a new initializer of struct
mlx5e_rss_params_indir that works directly with the struct, rather than
its internals.

The new initializer is called mlx5e_rss_params_indir_init_uniform, which
also reflects the purpose (uniform spreading) better.

Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlx5/core/en.h      |    3 ---
 drivers/net/ethernet/mellanox/mlx5/core/en/rqt.c  |    9 +++++++++
 drivers/net/ethernet/mellanox/mlx5/core/en/rqt.h  |    3 +++
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c |   16 +++-------------
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c   |    4 ++--
 5 files changed, 17 insertions(+), 18 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -984,9 +984,6 @@ void mlx5e_activate_priv_channels(struct
 void mlx5e_deactivate_priv_channels(struct mlx5e_priv *priv);
 int mlx5e_ptp_rx_manage_fs_ctx(struct mlx5e_priv *priv, void *ctx);
 
-void mlx5e_build_default_indir_rqt(u32 *indirection_rqt, int len,
-				   int num_channels);
-
 int mlx5e_modify_rq_state(struct mlx5e_rq *rq, int curr_state, int next_state);
 void mlx5e_activate_rq(struct mlx5e_rq *rq);
 void mlx5e_deactivate_rq(struct mlx5e_rq *rq);
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/rqt.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/rqt.c
@@ -4,6 +4,15 @@
 #include "rqt.h"
 #include <linux/mlx5/transobj.h>
 
+void mlx5e_rss_params_indir_init_uniform(struct mlx5e_rss_params_indir *indir,
+					 unsigned int num_channels)
+{
+	unsigned int i;
+
+	for (i = 0; i < MLX5E_INDIR_RQT_SIZE; i++)
+		indir->table[i] = i % num_channels;
+}
+
 static int mlx5e_rqt_init(struct mlx5e_rqt *rqt, struct mlx5_core_dev *mdev,
 			  u16 max_size, u32 *init_rqns, u16 init_size)
 {
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/rqt.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/rqt.h
@@ -14,6 +14,9 @@ struct mlx5e_rss_params_indir {
 	u32 table[MLX5E_INDIR_RQT_SIZE];
 };
 
+void mlx5e_rss_params_indir_init_uniform(struct mlx5e_rss_params_indir *indir,
+					 unsigned int num_channels);
+
 struct mlx5e_rqt {
 	struct mlx5_core_dev *mdev;
 	u32 rqtn;
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -2563,8 +2563,8 @@ int mlx5e_num_channels_changed(struct ml
 
 	/* This function may be called on attach, before priv->rx_res is created. */
 	if (!netif_is_rxfh_configured(priv->netdev) && priv->rx_res)
-		mlx5e_build_default_indir_rqt(priv->rx_res->rss_params.indir.table,
-					      MLX5E_INDIR_RQT_SIZE, count);
+		mlx5e_rss_params_indir_init_uniform(&priv->rx_res->rss_params.indir,
+						    count);
 
 	return 0;
 }
@@ -4450,15 +4450,6 @@ const struct net_device_ops mlx5e_netdev
 	.ndo_get_devlink_port    = mlx5e_get_devlink_port,
 };
 
-void mlx5e_build_default_indir_rqt(u32 *indirection_rqt, int len,
-				   int num_channels)
-{
-	int i;
-
-	for (i = 0; i < len; i++)
-		indirection_rqt[i] = i % num_channels;
-}
-
 static u32 mlx5e_choose_lro_timeout(struct mlx5_core_dev *mdev, u32 wanted_timeout)
 {
 	int i;
@@ -4479,8 +4470,7 @@ void mlx5e_build_rss_params(struct mlx5e
 	rss_params->hash.hfunc = ETH_RSS_HASH_TOP;
 	netdev_rss_key_fill(rss_params->hash.toeplitz_hash_key,
 			    sizeof(rss_params->hash.toeplitz_hash_key));
-	mlx5e_build_default_indir_rqt(rss_params->indir.table,
-				      MLX5E_INDIR_RQT_SIZE, num_channels);
+	mlx5e_rss_params_indir_init_uniform(&rss_params->indir, num_channels);
 	for (tt = 0; tt < MLX5E_NUM_INDIR_TIRS; tt++)
 		rss_params->rx_hash_fields[tt] =
 			mlx5e_rss_get_default_tt_config(tt).rx_hash_fields;
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -525,9 +525,9 @@ static int mlx5e_hairpin_create_indirect
 	if (!indir)
 		return -ENOMEM;
 
-	mlx5e_build_default_indir_rqt(indir->table, MLX5E_INDIR_RQT_SIZE, hp->num_channels);
+	mlx5e_rss_params_indir_init_uniform(indir, hp->num_channels);
 	err = mlx5e_rqt_init_indir(&hp->indir_rqt, mdev, hp->pair->rqn, hp->num_channels,
-				    priv->rx_res->rss_params.hash.hfunc, indir);
+				   priv->rx_res->rss_params.hash.hfunc, indir);
 
 	kvfree(indir);
 	return err;