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b=Noeb5AlgLEyzu6wPH0p44MqtVK7yyaN08YYiETyAXdh8oVCNdhlQ8ldQTsl24XJc26hkcwJHPzE78cTlzrbPkUz7z9zWyCePF68dxhyxVddk607W2d+GiZApT41zLe99AfiRS92P55Klm4YP9j7julJnHb32EMelCI7dCashHvnpRZKMuzP/IZdsKhOLgPS9RTYjRnGZ/6YPc3o97cj1Pz1B5rQfHl/RUTKBtt7cobnC31APX0l00MDFg9pEcwN/XdxA135964venHQF1CQFAxvaxXqAA1XptFI1HSfbvvmkRrF+tASxfEX7Y2HzHBXgBazE3Uv9sQQ3ATYWdYxj5Q== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from SJ1PR12MB6075.namprd12.prod.outlook.com (2603:10b6:a03:45e::8) by LV2PR12MB5800.namprd12.prod.outlook.com (2603:10b6:408:178::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7025.18; Wed, 22 Nov 2023 13:49:48 +0000 Received: from SJ1PR12MB6075.namprd12.prod.outlook.com ([fe80::eb39:938e:7503:c21e]) by SJ1PR12MB6075.namprd12.prod.outlook.com ([fe80::eb39:938e:7503:c21e%3]) with mapi id 15.20.7002.028; Wed, 22 Nov 2023 13:49:48 +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 Cc: Boris Pismenny , aaptel@nvidia.com, aurelien.aptel@gmail.com, smalin@nvidia.com, malin1024@gmail.com, ogerlitz@nvidia.com, yorayz@nvidia.com, galshalom@nvidia.com, mgurtovoy@nvidia.com Subject: [PATCH v20 14/20] net/mlx5e: TCP flow steering for nvme-tcp acceleration Date: Wed, 22 Nov 2023 13:48:27 +0000 Message-Id: <20231122134833.20825-15-aaptel@nvidia.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231122134833.20825-1-aaptel@nvidia.com> References: <20231122134833.20825-1-aaptel@nvidia.com> X-ClientProxiedBy: FR2P281CA0095.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:9b::17) 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_|LV2PR12MB5800:EE_ X-MS-Office365-Filtering-Correlation-Id: b0df1a28-aeb4-40c9-804a-08dbeb61e472 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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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 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: