net/mlx5e: Use dedicated uplink vport netdev representor

Currently, when running in sriov switchdev mode, we are using the PF
netdevice as the uplink representor, this is problematic from few aspects:

- will break when the PF isn't eswitch manager (e.g smart NIC env)
- misalignment with other NIC switchdev drivers
- makes us have and maintain special code, hurts the driver quality/robustness
- which in turn opens the door for future bugs

As of each and all of the above, we move to have a dedicated netdev representor
for the uplink vport in a similar manner done for for the VF vports.

This includes the following:

1. have an uplink rep netdev as we have for VF reps
2. all reps use same load/unload functions
3. HW stats for uplink based on physical port counters and not vport counters
4. link state for the uplink managed through PAOS and not vport state
5. the uplink rep has sysfs link to the PF PCI function && uses the PF MAC address
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/en.h

@@ -775,6 +775,7 @@ mlx5e_skb_from_cqe_nonlinear(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe,
 			     struct mlx5e_wqe_frag_info *wi, u32 cqe_bcnt);
 
 void mlx5e_update_stats(struct mlx5e_priv *priv);
+void mlx5e_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats);
 
 void mlx5e_init_l2_addr(struct mlx5e_priv *priv);
 int mlx5e_self_test_num(struct mlx5e_priv *priv);
@@ -939,7 +940,6 @@ int mlx5e_create_tis(struct mlx5_core_dev *mdev, int tc,
 void mlx5e_destroy_tis(struct mlx5_core_dev *mdev, u32 tisn);
 
 int mlx5e_create_tises(struct mlx5e_priv *priv);
-void mlx5e_cleanup_nic_tx(struct mlx5e_priv *priv);
 int mlx5e_close(struct net_device *netdev);
 int mlx5e_open(struct net_device *netdev);
 void mlx5e_update_ndo_stats(struct mlx5e_priv *priv);
@@ -948,6 +948,7 @@ void mlx5e_queue_update_stats(struct mlx5e_priv *priv);
 int mlx5e_bits_invert(unsigned long a, int size);
 
 typedef int (*change_hw_mtu_cb)(struct mlx5e_priv *priv);
+int mlx5e_set_dev_port_mtu(struct mlx5e_priv *priv);
 int mlx5e_change_mtu(struct net_device *netdev, int new_mtu,
 		     change_hw_mtu_cb set_mtu_cb);
 

drivers/net/ethernet/mellanox/mlx5/core/en_main.c

@@ -2821,7 +2821,7 @@ static void mlx5e_query_mtu(struct mlx5_core_dev *mdev,
 	*mtu = MLX5E_HW2SW_MTU(params, hw_mtu);
 }
 
-static int mlx5e_set_dev_port_mtu(struct mlx5e_priv *priv)
+int mlx5e_set_dev_port_mtu(struct mlx5e_priv *priv)
 {
 	struct mlx5e_params *params = &priv->channels.params;
 	struct net_device *netdev = priv->netdev;
@@ -2901,7 +2901,7 @@ void mlx5e_activate_priv_channels(struct mlx5e_priv *priv)
 	mlx5e_activate_channels(&priv->channels);
 	netif_tx_start_all_queues(priv->netdev);
 
-	if (MLX5_ESWITCH_MANAGER(priv->mdev))
+	if (mlx5e_is_vport_rep(priv))
 		mlx5e_add_sqs_fwd_rules(priv);
 
 	mlx5e_wait_channels_min_rx_wqes(&priv->channels);
@@ -2912,7 +2912,7 @@ void mlx5e_deactivate_priv_channels(struct mlx5e_priv *priv)
 {
 	mlx5e_redirect_rqts_to_drop(priv);
 
-	if (MLX5_ESWITCH_MANAGER(priv->mdev))
+	if (mlx5e_is_vport_rep(priv))
 		mlx5e_remove_sqs_fwd_rules(priv);
 
 	/* FIXME: This is a W/A only for tx timeout watch dog false alarm when
@@ -3164,7 +3164,7 @@ int mlx5e_create_tises(struct mlx5e_priv *priv)
 	return err;
 }
 
-void mlx5e_cleanup_nic_tx(struct mlx5e_priv *priv)
+static void mlx5e_cleanup_nic_tx(struct mlx5e_priv *priv)
 {
 	int tc;
 
@@ -3409,7 +3409,8 @@ static int mlx5e_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
 
 	switch (type) {
 	case TC_SETUP_CLSFLOWER:
-		return mlx5e_setup_tc_cls_flower(priv, type_data, MLX5E_TC_INGRESS);
+		return mlx5e_setup_tc_cls_flower(priv, type_data, MLX5E_TC_INGRESS |
+						 MLX5E_TC_NIC_OFFLOAD);
 	default:
 		return -EOPNOTSUPP;
 	}
@@ -3452,7 +3453,7 @@ static int mlx5e_setup_tc(struct net_device *dev, enum tc_setup_type type,
 	}
 }
 
-static void
+void
 mlx5e_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats)
 {
 	struct mlx5e_priv *priv = netdev_priv(dev);
@@ -3596,7 +3597,7 @@ static int set_feature_tc_num_filters(struct net_device *netdev, bool enable)
 {
 	struct mlx5e_priv *priv = netdev_priv(netdev);
 
-	if (!enable && mlx5e_tc_num_filters(priv)) {
+	if (!enable && mlx5e_tc_num_filters(priv, MLX5E_TC_NIC_OFFLOAD)) {
 		netdev_err(netdev,
 			   "Active offloaded tc filters, can't turn hw_tc_offload off\n");
 		return -EINVAL;
@@ -4607,12 +4608,6 @@ static void mlx5e_set_netdev_dev_addr(struct net_device *netdev)
 	}
 }
 
-#if IS_ENABLED(CONFIG_MLX5_ESWITCH)
-static const struct switchdev_ops mlx5e_switchdev_ops = {
-	.switchdev_port_attr_get	= mlx5e_attr_get,
-};
-#endif
-
 static void mlx5e_build_nic_netdev(struct net_device *netdev)
 {
 	struct mlx5e_priv *priv = netdev_priv(netdev);
@@ -4722,12 +4717,6 @@ static void mlx5e_build_nic_netdev(struct net_device *netdev)
 	netdev->priv_flags       |= IFF_UNICAST_FLT;
 
 	mlx5e_set_netdev_dev_addr(netdev);
-
-#if IS_ENABLED(CONFIG_MLX5_ESWITCH)
-	if (MLX5_ESWITCH_MANAGER(mdev))
-		netdev->switchdev_ops = &mlx5e_switchdev_ops;
-#endif
-
 	mlx5e_ipsec_build_netdev(priv);
 	mlx5e_tls_build_netdev(priv);
 }
@@ -4908,7 +4897,7 @@ static void mlx5e_nic_enable(struct mlx5e_priv *priv)
 		mlx5e_monitor_counter_init(priv);
 
 	if (MLX5_ESWITCH_MANAGER(priv->mdev))
-		mlx5e_register_vport_reps(priv);
+		mlx5e_rep_register_vport_reps(priv);
 
 	if (netdev->reg_state != NETREG_REGISTERED)
 		return;
@@ -4943,7 +4932,7 @@ static void mlx5e_nic_disable(struct mlx5e_priv *priv)
 	queue_work(priv->wq, &priv->set_rx_mode_work);
 
 	if (MLX5_ESWITCH_MANAGER(priv->mdev))
-		mlx5e_unregister_vport_reps(priv);
+		mlx5e_rep_unregister_vport_reps(priv);
 
 	if (mlx5e_monitor_counter_supported(priv))
 		mlx5e_monitor_counter_cleanup(priv);

drivers/net/ethernet/mellanox/mlx5/core/en_rep.h

@@ -162,8 +162,8 @@ struct mlx5e_rep_sq {
 };
 
 void *mlx5e_alloc_nic_rep_priv(struct mlx5_core_dev *mdev);
-void mlx5e_register_vport_reps(struct mlx5e_priv *priv);
-void mlx5e_unregister_vport_reps(struct mlx5e_priv *priv);
+void mlx5e_rep_register_vport_reps(struct mlx5e_priv *priv);
+void mlx5e_rep_unregister_vport_reps(struct mlx5e_priv *priv);
 bool mlx5e_is_uplink_rep(struct mlx5e_priv *priv);
 int mlx5e_add_sqs_fwd_rules(struct mlx5e_priv *priv);
 void mlx5e_remove_sqs_fwd_rules(struct mlx5e_priv *priv);
@@ -171,7 +171,6 @@ void mlx5e_remove_sqs_fwd_rules(struct mlx5e_priv *priv);
 int mlx5e_get_offload_stats(int attr_id, const struct net_device *dev, void *sp);
 bool mlx5e_has_offload_stats(const struct net_device *dev, int attr_id);
 
-int mlx5e_attr_get(struct net_device *dev, struct switchdev_attr *attr);
 void mlx5e_handle_rx_cqe_rep(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe);
 
 int mlx5e_rep_encap_entry_attach(struct mlx5e_priv *priv,
@@ -181,11 +180,15 @@ void mlx5e_rep_encap_entry_detach(struct mlx5e_priv *priv,
 
 void mlx5e_rep_queue_neigh_stats_work(struct mlx5e_priv *priv);
 #else /* CONFIG_MLX5_ESWITCH */
-static inline void mlx5e_register_vport_reps(struct mlx5e_priv *priv) {}
-static inline void mlx5e_unregister_vport_reps(struct mlx5e_priv *priv) {}
+static inline void mlx5e_rep_register_vport_reps(struct mlx5e_priv *priv) {}
+static inline void mlx5e_rep_unregister_vport_reps(struct mlx5e_priv *priv) {}
 static inline bool mlx5e_is_uplink_rep(struct mlx5e_priv *priv) { return false; }
 static inline int mlx5e_add_sqs_fwd_rules(struct mlx5e_priv *priv) { return 0; }
 static inline void mlx5e_remove_sqs_fwd_rules(struct mlx5e_priv *priv) {}
 #endif
 
+static inline bool mlx5e_is_vport_rep(struct mlx5e_priv *priv)
+{
+	return (MLX5_ESWITCH_MANAGER(priv->mdev) && priv->ppriv);
+}
 #endif /* __MLX5E_REP_H__ */

drivers/net/ethernet/mellanox/mlx5/core/en_stats.c

@@ -486,7 +486,7 @@ static int mlx5e_grp_802_3_fill_stats(struct mlx5e_priv *priv, u64 *data,
 #define MLX5_BASIC_PPCNT_SUPPORTED(mdev) \
 	(MLX5_CAP_GEN(mdev, pcam_reg) ? MLX5_CAP_PCAM_REG(mdev, ppcnt) : 1)
 
-static void mlx5e_grp_802_3_update_stats(struct mlx5e_priv *priv)
+void mlx5e_grp_802_3_update_stats(struct mlx5e_priv *priv)
 {
 	struct mlx5e_pport_stats *pstats = &priv->stats.pport;
 	struct mlx5_core_dev *mdev = priv->mdev;

drivers/net/ethernet/mellanox/mlx5/core/en_stats.h

@@ -280,5 +280,6 @@ extern const struct mlx5e_stats_grp mlx5e_stats_grps[];
 extern const int mlx5e_num_stats_grps;
 
 void mlx5e_grp_sw_update_stats(struct mlx5e_priv *priv);
+void mlx5e_grp_802_3_update_stats(struct mlx5e_priv *priv);
 
 #endif /* __MLX5_EN_STATS_H__ */

drivers/net/ethernet/mellanox/mlx5/core/en_tc.c

@@ -69,13 +69,13 @@ struct mlx5_nic_flow_attr {
 enum {
 	MLX5E_TC_FLOW_INGRESS	= MLX5E_TC_INGRESS,
 	MLX5E_TC_FLOW_EGRESS	= MLX5E_TC_EGRESS,
-	MLX5E_TC_FLOW_ESWITCH	= BIT(MLX5E_TC_FLOW_BASE),
-	MLX5E_TC_FLOW_NIC	= BIT(MLX5E_TC_FLOW_BASE + 1),
-	MLX5E_TC_FLOW_OFFLOADED	= BIT(MLX5E_TC_FLOW_BASE + 2),
-	MLX5E_TC_FLOW_HAIRPIN	= BIT(MLX5E_TC_FLOW_BASE + 3),
-	MLX5E_TC_FLOW_HAIRPIN_RSS = BIT(MLX5E_TC_FLOW_BASE + 4),
-	MLX5E_TC_FLOW_SLOW	  = BIT(MLX5E_TC_FLOW_BASE + 5),
-	MLX5E_TC_FLOW_DUP         = BIT(MLX5E_TC_FLOW_BASE + 6),
+	MLX5E_TC_FLOW_ESWITCH	= MLX5E_TC_ESW_OFFLOAD,
+	MLX5E_TC_FLOW_NIC	= MLX5E_TC_NIC_OFFLOAD,
+	MLX5E_TC_FLOW_OFFLOADED	= BIT(MLX5E_TC_FLOW_BASE),
+	MLX5E_TC_FLOW_HAIRPIN	= BIT(MLX5E_TC_FLOW_BASE + 1),
+	MLX5E_TC_FLOW_HAIRPIN_RSS = BIT(MLX5E_TC_FLOW_BASE + 2),
+	MLX5E_TC_FLOW_SLOW	  = BIT(MLX5E_TC_FLOW_BASE + 3),
+	MLX5E_TC_FLOW_DUP         = BIT(MLX5E_TC_FLOW_BASE + 4),
 };
 
 #define MLX5E_TC_MAX_SPLITS 1
@@ -834,7 +834,7 @@ static void mlx5e_tc_del_nic_flow(struct mlx5e_priv *priv,
 	mlx5_del_flow_rules(flow->rule[0]);
 	mlx5_fc_destroy(priv->mdev, counter);
 
-	if (!mlx5e_tc_num_filters(priv) && priv->fs.tc.t) {
+	if (!mlx5e_tc_num_filters(priv, MLX5E_TC_NIC_OFFLOAD)  && priv->fs.tc.t) {
 		mlx5_destroy_flow_table(priv->fs.tc.t);
 		priv->fs.tc.t = NULL;
 	}
@@ -2686,6 +2686,11 @@ static void get_flags(int flags, u16 *flow_flags)
 	if (flags & MLX5E_TC_EGRESS)
 		__flow_flags |= MLX5E_TC_FLOW_EGRESS;
 
+	if (flags & MLX5E_TC_ESW_OFFLOAD)
+		__flow_flags |= MLX5E_TC_FLOW_ESWITCH;
+	if (flags & MLX5E_TC_NIC_OFFLOAD)
+		__flow_flags |= MLX5E_TC_FLOW_NIC;
+
 	*flow_flags = __flow_flags;
 }
 
@@ -2696,15 +2701,15 @@ static const struct rhashtable_params tc_ht_params = {
 	.automatic_shrinking = true,
 };
 
-static struct rhashtable *get_tc_ht(struct mlx5e_priv *priv)
+static struct rhashtable *get_tc_ht(struct mlx5e_priv *priv, int flags)
 {
 	struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
 	struct mlx5e_rep_priv *uplink_rpriv;
 
-	if (MLX5_VPORT_MANAGER(priv->mdev) && esw->mode == SRIOV_OFFLOADS) {
+	if (flags & MLX5E_TC_ESW_OFFLOAD) {
 		uplink_rpriv = mlx5_eswitch_get_uplink_priv(esw, REP_ETH);
 		return &uplink_rpriv->uplink_priv.tc_ht;
-	} else
+	} else /* NIC offload */
 		return &priv->fs.tc.ht;
 }
 
@@ -2973,7 +2978,7 @@ int mlx5e_configure_flower(struct net_device *dev, struct mlx5e_priv *priv,
 			   struct tc_cls_flower_offload *f, int flags)
 {
 	struct netlink_ext_ack *extack = f->common.extack;
-	struct rhashtable *tc_ht = get_tc_ht(priv);
+	struct rhashtable *tc_ht = get_tc_ht(priv, flags);
 	struct mlx5e_tc_flow *flow;
 	int err = 0;
 
@@ -3018,7 +3023,7 @@ static bool same_flow_direction(struct mlx5e_tc_flow *flow, int flags)
 int mlx5e_delete_flower(struct net_device *dev, struct mlx5e_priv *priv,
 			struct tc_cls_flower_offload *f, int flags)
 {
-	struct rhashtable *tc_ht = get_tc_ht(priv);
+	struct rhashtable *tc_ht = get_tc_ht(priv, flags);
 	struct mlx5e_tc_flow *flow;
 
 	flow = rhashtable_lookup_fast(tc_ht, &f->cookie, tc_ht_params);
@@ -3038,7 +3043,7 @@ int mlx5e_stats_flower(struct net_device *dev, struct mlx5e_priv *priv,
 		       struct tc_cls_flower_offload *f, int flags)
 {
 	struct mlx5_devcom *devcom = priv->mdev->priv.devcom;
-	struct rhashtable *tc_ht = get_tc_ht(priv);
+	struct rhashtable *tc_ht = get_tc_ht(priv, flags);
 	struct mlx5_eswitch *peer_esw;
 	struct mlx5e_tc_flow *flow;
 	struct mlx5_fc *counter;
@@ -3168,7 +3173,7 @@ void mlx5e_tc_nic_cleanup(struct mlx5e_priv *priv)
 	if (tc->netdevice_nb.notifier_call)
 		unregister_netdevice_notifier(&tc->netdevice_nb);
 
-	rhashtable_free_and_destroy(&tc->ht, _mlx5e_tc_del_flow, NULL);
+	rhashtable_destroy(&tc->ht);
 
 	if (!IS_ERR_OR_NULL(tc->t)) {
 		mlx5_destroy_flow_table(tc->t);
@@ -3186,9 +3191,9 @@ void mlx5e_tc_esw_cleanup(struct rhashtable *tc_ht)
 	rhashtable_free_and_destroy(tc_ht, _mlx5e_tc_del_flow, NULL);
 }
 
-int mlx5e_tc_num_filters(struct mlx5e_priv *priv)
+int mlx5e_tc_num_filters(struct mlx5e_priv *priv, int flags)
 {
-	struct rhashtable *tc_ht = get_tc_ht(priv);
+	struct rhashtable *tc_ht = get_tc_ht(priv, flags);
 
 	return atomic_read(&tc_ht->nelems);
 }

drivers/net/ethernet/mellanox/mlx5/core/en_tc.h

@@ -42,7 +42,9 @@
 enum {
 	MLX5E_TC_INGRESS = BIT(0),
 	MLX5E_TC_EGRESS  = BIT(1),
-	MLX5E_TC_LAST_EXPORTED_BIT = 1,
+	MLX5E_TC_NIC_OFFLOAD = BIT(2),
+	MLX5E_TC_ESW_OFFLOAD = BIT(3),
+	MLX5E_TC_LAST_EXPORTED_BIT = 3,
 };
 
 int mlx5e_tc_nic_init(struct mlx5e_priv *priv);
@@ -68,13 +70,13 @@ void mlx5e_tc_encap_flows_del(struct mlx5e_priv *priv,
 struct mlx5e_neigh_hash_entry;
 void mlx5e_tc_update_neigh_used_value(struct mlx5e_neigh_hash_entry *nhe);
 
-int mlx5e_tc_num_filters(struct mlx5e_priv *priv);
+int mlx5e_tc_num_filters(struct mlx5e_priv *priv, int flags);
 
 
 #else /* CONFIG_MLX5_ESWITCH */
 static inline int  mlx5e_tc_nic_init(struct mlx5e_priv *priv) { return 0; }
 static inline void mlx5e_tc_nic_cleanup(struct mlx5e_priv *priv) {}
-static inline int  mlx5e_tc_num_filters(struct mlx5e_priv *priv) { return 0; }
+static inline int  mlx5e_tc_num_filters(struct mlx5e_priv *priv, int flags) { return 0; }
 #endif
 
 #endif /* __MLX5_EN_TC_H__ */