[PATCH v20 14/20] net/mlx5e: TCP flow steering for nvme-tcp acceleration
Aurelien Aptel
aaptel at nvidia.com
Wed Nov 22 05:48:27 PST 2023
From: Boris Pismenny <borisp at nvidia.com>
Both nvme-tcp and tls acceleration require tcp flow steering.
Add reference counter to share TCP flow steering structure.
Signed-off-by: Boris Pismenny <borisp at nvidia.com>
Signed-off-by: Ben Ben-Ishay <benishay at nvidia.com>
Signed-off-by: Or Gerlitz <ogerlitz at nvidia.com>
Signed-off-by: Yoray Zack <yorayz at nvidia.com>
Signed-off-by: Aurelien Aptel <aaptel at nvidia.com>
Reviewed-by: Tariq Toukan <tariqt at nvidia.com>
---
.../ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c
index c7d191f66ad1..82a9e2a4f58b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/fs_tcp.c
@@ -14,6 +14,7 @@ enum accel_fs_tcp_type {
struct mlx5e_accel_fs_tcp {
struct mlx5e_flow_table tables[ACCEL_FS_TCP_NUM_TYPES];
struct mlx5_flow_handle *default_rules[ACCEL_FS_TCP_NUM_TYPES];
+ refcount_t user_count;
};
static enum mlx5_traffic_types fs_accel2tt(enum accel_fs_tcp_type i)
@@ -361,6 +362,9 @@ void mlx5e_accel_fs_tcp_destroy(struct mlx5e_flow_steering *fs)
if (!accel_tcp)
return;
+ if (!refcount_dec_and_test(&accel_tcp->user_count))
+ return;
+
accel_fs_tcp_disable(fs);
for (i = 0; i < ACCEL_FS_TCP_NUM_TYPES; i++)
@@ -372,12 +376,17 @@ void mlx5e_accel_fs_tcp_destroy(struct mlx5e_flow_steering *fs)
int mlx5e_accel_fs_tcp_create(struct mlx5e_flow_steering *fs)
{
- struct mlx5e_accel_fs_tcp *accel_tcp;
+ struct mlx5e_accel_fs_tcp *accel_tcp = mlx5e_fs_get_accel_tcp(fs);
int i, err;
if (!MLX5_CAP_FLOWTABLE_NIC_RX(mlx5e_fs_get_mdev(fs), ft_field_support.outer_ip_version))
return -EOPNOTSUPP;
+ if (accel_tcp) {
+ refcount_inc(&accel_tcp->user_count);
+ return 0;
+ }
+
accel_tcp = kzalloc(sizeof(*accel_tcp), GFP_KERNEL);
if (!accel_tcp)
return -ENOMEM;
@@ -393,6 +402,7 @@ int mlx5e_accel_fs_tcp_create(struct mlx5e_flow_steering *fs)
if (err)
goto err_destroy_tables;
+ refcount_set(&accel_tcp->user_count, 1);
return 0;
err_destroy_tables:
--
2.34.1
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