linux-kernel - [PATCH net-next 3/3] net/mlx5: Initialize bulk for single flow counters

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Message-ID: <1768210825-1598472-4-git-send-email-tariqt@nvidia.com>
Date: Mon, 12 Jan 2026 11:40:25 +0200
From: Tariq Toukan <tariqt@...dia.com>
To: Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew+netdev@...n.ch>, "David
 S. Miller" <davem@...emloft.net>
CC: Saeed Mahameed <saeedm@...dia.com>, Leon Romanovsky <leon@...nel.org>,
	Tariq Toukan <tariqt@...dia.com>, Mark Bloch <mbloch@...dia.com>,
	<netdev@...r.kernel.org>, <linux-rdma@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Gal Pressman <gal@...dia.com>, Moshe Shemesh
	<moshe@...dia.com>, Yevgeny Kliteynik <kliteyn@...dia.com>
Subject: [PATCH net-next 3/3] net/mlx5: Initialize bulk for single flow counters

From: Moshe Shemesh <moshe@...dia.com>

Ensure that flow counters allocated with mlx5_fc_single_alloc() have
bulk correctly initialized so they can safely be used in HWS rules.

Signed-off-by: Moshe Shemesh <moshe@...dia.com>
Reviewed-by: Mark Bloch <mbloch@...dia.com>
Reviewed-by: Yevgeny Kliteynik <kliteyn@...dia.com>
Signed-off-by: Tariq Toukan <tariqt@...dia.com>
---
 .../net/ethernet/mellanox/mlx5/core/fs_core.h |  3 +-
 .../ethernet/mellanox/mlx5/core/fs_counters.c | 39 +++++++++++++------
 2 files changed, 29 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
index 1c6591425260..dbaf33b537f7 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
@@ -308,7 +308,8 @@ struct mlx5_flow_root_namespace {
 };
 
 enum mlx5_fc_type {
-	MLX5_FC_TYPE_ACQUIRED = 0,
+	MLX5_FC_TYPE_POOL_ACQUIRED = 0,
+	MLX5_FC_TYPE_SINGLE,
 	MLX5_FC_TYPE_LOCAL,
 };
 
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c
index 14539a20a60f..fe7caa910219 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c
@@ -153,6 +153,7 @@ static void mlx5_fc_stats_query_all_counters(struct mlx5_core_dev *dev)
 static void mlx5_fc_free(struct mlx5_core_dev *dev, struct mlx5_fc *counter)
 {
 	mlx5_cmd_fc_free(dev, counter->id);
+	kfree(counter->bulk);
 	kfree(counter);
 }
 
@@ -163,7 +164,7 @@ static void mlx5_fc_release(struct mlx5_core_dev *dev, struct mlx5_fc *counter)
 	if (WARN_ON(counter->type == MLX5_FC_TYPE_LOCAL))
 		return;
 
-	if (counter->bulk)
+	if (counter->type == MLX5_FC_TYPE_POOL_ACQUIRED)
 		mlx5_fc_pool_release_counter(&fc_stats->fc_pool, counter);
 	else
 		mlx5_fc_free(dev, counter);
@@ -220,8 +221,16 @@ static void mlx5_fc_stats_work(struct work_struct *work)
 	mlx5_fc_stats_query_all_counters(dev);
 }
 
+static void mlx5_fc_bulk_init(struct mlx5_fc_bulk *fc_bulk, u32 base_id)
+{
+	fc_bulk->base_id = base_id;
+	refcount_set(&fc_bulk->hws_data.hws_action_refcount, 0);
+	mutex_init(&fc_bulk->hws_data.lock);
+}
+
 static struct mlx5_fc *mlx5_fc_single_alloc(struct mlx5_core_dev *dev)
 {
+	struct mlx5_fc_bulk *fc_bulk;
 	struct mlx5_fc *counter;
 	int err;
 
@@ -229,13 +238,26 @@ static struct mlx5_fc *mlx5_fc_single_alloc(struct mlx5_core_dev *dev)
 	if (!counter)
 		return ERR_PTR(-ENOMEM);
 
-	err = mlx5_cmd_fc_alloc(dev, &counter->id);
-	if (err) {
-		kfree(counter);
-		return ERR_PTR(err);
+	fc_bulk = kzalloc(sizeof(*fc_bulk), GFP_KERNEL);
+	if (!fc_bulk) {
+		err = -ENOMEM;
+		goto free_counter;
 	}
+	err = mlx5_cmd_fc_alloc(dev, &counter->id);
+	if (err)
+		goto free_bulk;
 
+	counter->type = MLX5_FC_TYPE_SINGLE;
+	mlx5_fs_bulk_init(&fc_bulk->fs_bulk, 1);
+	mlx5_fc_bulk_init(fc_bulk, counter->id);
+	counter->bulk = fc_bulk;
 	return counter;
+
+free_bulk:
+	kfree(fc_bulk);
+free_counter:
+	kfree(counter);
+	return ERR_PTR(err);
 }
 
 static struct mlx5_fc *mlx5_fc_acquire(struct mlx5_core_dev *dev, bool aging)
@@ -421,13 +443,6 @@ static void mlx5_fc_init(struct mlx5_fc *counter, struct mlx5_fc_bulk *bulk,
 	counter->id = id;
 }
 
-static void mlx5_fc_bulk_init(struct mlx5_fc_bulk *fc_bulk, u32 base_id)
-{
-	fc_bulk->base_id = base_id;
-	refcount_set(&fc_bulk->hws_data.hws_action_refcount, 0);
-	mutex_init(&fc_bulk->hws_data.lock);
-}
-
 u32 mlx5_fc_get_base_id(struct mlx5_fc *counter)
 {
 	return counter->bulk->base_id;
-- 
2.31.1