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Mon, 8 Jun 2026 06:57:05 -0700 From: Tariq Toukan To: Eric Dumazet , Jakub Kicinski , Paolo Abeni , Andrew Lunn , "David S. Miller" CC: Saeed Mahameed , Leon Romanovsky , Tariq Toukan , Mark Bloch , Shay Drory , Or Har-Toov , Edward Srouji , Simon Horman , Maher Sanalla , Parav Pandit , Kees Cook , Moshe Shemesh , Patrisious Haddad , , , , Gal Pressman , Dragos Tatulea Subject: [PATCH net-next V2 07/15] net/mlx5: SD, support switchdev mode transition with shared FDB Date: Mon, 8 Jun 2026 16:55:39 +0300 Message-ID: <20260608135547.482825-8-tariqt@nvidia.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20260608135547.482825-1-tariqt@nvidia.com> References: <20260608135547.482825-1-tariqt@nvidia.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN1PEPF00006000:EE_|CH3PR12MB8233:EE_ X-MS-Office365-Filtering-Correlation-Id: 8af14213-483b-4550-2441-08dec565e2c3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|82310400026|1800799024|7416014|376014|22082099003|18002099003|6133799003|11063799006|56012099006; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.232;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge1.nvidia.com;CAT:NONE;SFS:(13230040)(36860700016)(82310400026)(1800799024)(7416014)(376014)(22082099003)(18002099003)(6133799003)(11063799006)(56012099006);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: d2cU+/mm7jCXcyfk8U6QY0k2GsMwJniemeTYyVM4E0rfhXPNOdTW1MsPx6wCq5x0LYHiF8A0E5P6yT9aEF2XVX/+ddPdMXaiDiLulkyt8x6Yai2bBQnMheJl6Biqg0t4HoblNpwWGbzP6O0qnAN/87xDwAK+NYJGk7Pcy6jBW+e9tU2BWDWr+xmFkRFehWxJ99fAzfmuTU9/qkXMS0XiEJvssJQLfKZD3YSIvk5W7C8WH/K+O7XYfYKXyYRhuZlPyXyYml1KC4JekqU5IVGO6Q26HValewD+RVcg4hrs5vd2vT/nqXftAtzPESuTtCVmJMVCVOJiKh47ndRh8ulkjywmp5/ATRlbygo2p0jv0R2jLSmatYkqauexub5bqQSWl/zNxhbge9Dk9leabPa3sC65s+A264qsueXVbo+bOmfE/hnAczOyN4SO/F3JN6ha X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Jun 2026 13:57:31.7970 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8af14213-483b-4550-2441-08dec565e2c3 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN1PEPF00006000.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB8233 From: Shay Drory When the eswitch transitions, propagate the change to SD: secondaries get their TX flow table root reconfigured for the new mode, and when all group devices move to switchdev, the per-group shared FDB is activated. Shared FDB activation is best-effort - failure does not block the eswitch transition; the next transition retries. Note: the existing mlx5_get_sd() guard that blocks switchdev for SD devices is intentionally retained. It will be removed once all supporting patches are in place. Signed-off-by: Shay Drory Reviewed-by: Mark Bloch Signed-off-by: Tariq Toukan --- .../mellanox/mlx5/core/eswitch_offloads.c | 12 +- .../net/ethernet/mellanox/mlx5/core/lib/sd.c | 137 +++++++++++++++++- .../net/ethernet/mellanox/mlx5/core/lib/sd.h | 7 + 3 files changed, 153 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c index 366531d8ef02..915571a1586c 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c @@ -46,6 +46,7 @@ #include "fs_core.h" #include "lib/mlx5.h" #include "lib/devcom.h" +#include "lib/sd.h" #include "lib/eq.h" #include "lib/fs_chains.h" #include "en_tc.h" @@ -3164,6 +3165,9 @@ static void esw_unset_master_egress_rule(struct mlx5_core_dev *dev, vport = mlx5_eswitch_get_vport(dev->priv.eswitch, dev->priv.eswitch->manager_vport); + if (!vport->egress.acl) + return; + esw_acl_egress_ofld_bounce_rule_destroy(vport, MLX5_CAP_GEN(slave_dev, vhca_id)); if (xa_empty(&vport->egress.offloads.bounce_rules)) { @@ -3182,6 +3186,9 @@ int mlx5_eswitch_offloads_single_fdb_add_one(struct mlx5_eswitch *master_esw, if (err) return err; + if (!mlx5_sd_is_primary(slave_esw->dev)) + return 0; + err = esw_set_master_egress_rule(master_esw->dev, slave_esw->dev, max_slaves); if (err) @@ -3401,7 +3408,7 @@ void mlx5_esw_offloads_devcom_init(struct mlx5_eswitch *esw, return; if ((MLX5_VPORT_MANAGER(esw->dev) || mlx5_core_is_ecpf_esw_manager(esw->dev)) && - !mlx5_lag_is_supported(esw->dev)) + (!mlx5_lag_is_supported(esw->dev) && !mlx5_get_sd(esw->dev))) return; xa_init(&esw->paired); @@ -4306,6 +4313,9 @@ int mlx5_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode, mlx5_esw_unlock(esw); enable_lag: mlx5_lag_enable_change(esw->dev); + /* Shared FDB activation is creating LAG which is changing reps. */ + if (!err) + mlx5_sd_eswitch_mode_set(esw->dev, mlx5_mode); return err; } diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/sd.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/sd.c index 8b1f3a25d80d..9ff62c134c2a 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/lib/sd.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/sd.c @@ -5,6 +5,8 @@ #include "../lag/lag.h" #include "mlx5_core.h" #include "lib/mlx5.h" +#include "devlink.h" +#include "eswitch.h" #include "fs_cmd.h" #include #include @@ -33,6 +35,8 @@ struct mlx5_sd { struct { /* secondary */ struct mlx5_core_dev *primary_dev; u32 alias_obj_id; + /* TX flow table root in switchdev (silent) config */ + bool tx_root_silent; }; }; }; @@ -669,6 +673,29 @@ static void sd_secondary_destroy_alias_ft(struct mlx5_core_dev *secondary) MLX5_GENERAL_OBJECT_TYPES_FLOW_TABLE_ALIAS); } +static int mlx5_sd_secondary_conf_tx_root(struct mlx5_core_dev *secondary, + bool disconnect) +{ + struct mlx5_sd *sd = mlx5_get_sd(secondary); + int err; + + /* Idempotent: skip if TX root is already in the requested state. */ + if (sd->tx_root_silent == disconnect) + return 0; + + if (disconnect) + err = mlx5_fs_cmd_set_tx_flow_table_root(secondary, 0, true); + else + err = mlx5_fs_cmd_set_tx_flow_table_root(secondary, + sd->alias_obj_id, + false); + if (err) + return err; + + sd->tx_root_silent = disconnect; + return 0; +} + static int sd_cmd_set_secondary(struct mlx5_core_dev *secondary, struct mlx5_core_dev *primary, u8 *alias_key) @@ -688,7 +715,8 @@ static int sd_cmd_set_secondary(struct mlx5_core_dev *secondary, if (err) goto err_unset_silent; - err = mlx5_fs_cmd_set_tx_flow_table_root(secondary, sd->alias_obj_id, false); + err = mlx5_fs_cmd_set_tx_flow_table_root(secondary, sd->alias_obj_id, + false); if (err) goto err_destroy_alias_ft; @@ -707,7 +735,7 @@ static void sd_cmd_unset_secondary(struct mlx5_core_dev *secondary) struct mlx5_sd *primary_sd; primary_sd = mlx5_get_sd(mlx5_sd_get_primary(secondary)); - mlx5_fs_cmd_set_tx_flow_table_root(secondary, 0, true); + mlx5_sd_secondary_conf_tx_root(secondary, true); sd_secondary_destroy_alias_ft(secondary); if (!primary_sd->fw_silents_secondaries) mlx5_fs_cmd_set_l2table_entry_silent(secondary, 0); @@ -936,6 +964,111 @@ struct auxiliary_device *mlx5_sd_get_adev(struct mlx5_core_dev *dev, return &primary_adev->adev; } +#ifdef CONFIG_MLX5_ESWITCH +/* All SD members must have completed esw_offloads_enable (i.e., reached + * mlx5_esw_offloads_devcom_init) and become eswitch-peers of the primary. + * Until then, mlx5_eswitch_is_peer() returns false for the not-yet-paired + * member and shared_fdb_supported_filter would reject. When all PFs transition + * in parallel, only the last one to finish satisfies this gate; the earlier + * ones return 0 silently here. + */ +static bool mlx5_sd_all_paired(struct mlx5_core_dev *primary) +{ + struct mlx5_eswitch *primary_esw = primary->priv.eswitch; + struct mlx5_core_dev *pos; + int i; + + mlx5_sd_for_each_secondary(i, primary, pos) { + if (!mlx5_eswitch_is_peer(primary_esw, pos->priv.eswitch)) + return false; + } + return true; +} + +static void mlx5_sd_activate_shared_fdb(struct mlx5_core_dev *primary) +{ + struct mlx5_sd *sd = mlx5_get_sd(primary); + struct mlx5_lag *ldev; + struct lag_func *pf; + int err; + int i; + + ldev = mlx5_lag_dev(primary); + if (!ldev) { + sd_warn(primary, "Shared FDB MUST have ldev\n"); + return; + } + + mutex_lock(&ldev->lock); + + if (ldev->mode_changes_in_progress) + goto unlock; + + if (!mlx5_sd_all_paired(primary)) + goto unlock; + + /* Check if SD FDB is already active for this group */ + mlx5_lag_for_each(i, 0, ldev, sd->group_id) { + pf = mlx5_lag_pf(ldev, i); + if (pf->sd_fdb_active) + goto unlock; + break; + } + + if (!mlx5_lag_shared_fdb_supported_filter(ldev, sd->group_id)) { + sd_warn(primary, "Shared FDB not supported\n"); + goto unlock; + } + + err = mlx5_lag_shared_fdb_create(ldev, NULL, 0, sd->group_id); + if (err) + sd_warn(primary, "Failed to create shared FDB: %d\n", err); + else + sd_info(primary, "Shared FDB created\n"); + +unlock: + mutex_unlock(&ldev->lock); +} + +void mlx5_sd_eswitch_mode_set(struct mlx5_core_dev *dev, u16 mlx5_mode) +{ + struct mlx5_core_dev *primary; + struct mlx5_sd *sd; + int err; + + sd = mlx5_get_sd(dev); + if (!sd || !mlx5_devcom_comp_is_ready(sd->devcom)) + return; + + mlx5_devcom_comp_lock(sd->devcom); + if (!mlx5_devcom_comp_is_ready(sd->devcom)) + goto unlock; + + primary = mlx5_sd_get_primary(dev); + + /* Secondary devices need TX root reconfiguration */ + if (dev != primary) { + bool disconnect = (mlx5_mode == MLX5_ESWITCH_OFFLOADS); + + err = mlx5_sd_secondary_conf_tx_root(dev, disconnect); + if (err) { + sd_warn(dev, "Failed to set TX root: %d\n", err); + goto unlock; + } + } + + /* Try to activate shared FDB when all devices are in switchdev. + * Shared FDB is optional - failure here doesn't fail the transition. + */ + if (mlx5_mode == MLX5_ESWITCH_OFFLOADS) + mlx5_sd_activate_shared_fdb(primary); + +unlock: + mlx5_devcom_comp_unlock(sd->devcom); +} + +#endif /* CONFIG_MLX5_ESWITCH */ + void mlx5_sd_put_adev(struct auxiliary_device *actual_adev, struct auxiliary_device *adev) { diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/sd.h b/drivers/net/ethernet/mellanox/mlx5/core/lib/sd.h index 7a41adbcee71..cb88bf34079a 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/lib/sd.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/sd.h @@ -45,6 +45,13 @@ mlx5_sd_get_devcom(struct mlx5_core_dev *dev) } #endif +#ifdef CONFIG_MLX5_ESWITCH +void mlx5_sd_eswitch_mode_set(struct mlx5_core_dev *dev, u16 mlx5_mode); +#else +static inline void +mlx5_sd_eswitch_mode_set(struct mlx5_core_dev *dev, u16 mlx5_mode) { return; } +#endif + #define mlx5_sd_for_each_dev_from_to(i, primary, ix_from, to, pos) \ for (i = ix_from; \ (pos = mlx5_sd_primary_get_peer(primary, i)) && pos != (to); i++) -- 2.44.0