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Wed, 29 May 2024 16:02:15 +0000 Received: from SJ1PR12MB6075.namprd12.prod.outlook.com ([fe80::3715:9750:b92c:7bee]) by SJ1PR12MB6075.namprd12.prod.outlook.com ([fe80::3715:9750:b92c:7bee%6]) with mapi id 15.20.7633.018; Wed, 29 May 2024 16:02:15 +0000 From: Aurelien Aptel To: linux-nvme@lists.infradead.org, netdev@vger.kernel.org, sagi@grimberg.me, hch@lst.de, kbusch@kernel.org, axboe@fb.com, chaitanyak@nvidia.com, davem@davemloft.net, kuba@kernel.org Subject: [PATCH v25 14/20] net/mlx5e: TCP flow steering for nvme-tcp acceleration Date: Wed, 29 May 2024 16:00:47 +0000 Message-Id: <20240529160053.111531-15-aaptel@nvidia.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240529160053.111531-1-aaptel@nvidia.com> References: <20240529160053.111531-1-aaptel@nvidia.com> X-ClientProxiedBy: LO2P265CA0193.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:9e::13) To SJ1PR12MB6075.namprd12.prod.outlook.com (2603:10b6:a03:45e::8) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PR12MB6075:EE_|SJ2PR12MB7799:EE_ X-MS-Office365-Filtering-Correlation-Id: 6f152471-7d6e-4d20-ac80-08dc7ff8b4ea X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230031|366007|376005|1800799015; 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Add reference counter to share TCP flow steering structure. Signed-off-by: Boris Pismenny Signed-off-by: Ben Ben-Ishay Signed-off-by: Or Gerlitz Signed-off-by: Yoray Zack Signed-off-by: Aurelien Aptel Reviewed-by: Tariq Toukan --- .../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 4f83e3172767..f5c67f9cb2f9 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: