net/mlx5: E-Switch, Properly refer to the esw manager vport

In SmartNIC mode, the eswitch manager is not necessarily the PF
(vport 0). Use a helper function to get the correct eswitch manager
vport number and cache on the eswitch instance for fast reference.
Signed-off-by: Bodong Wang <bodong@mellanox.com>
Signed-off-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

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

@@ -378,16 +378,16 @@ static int esw_add_uc_addr(struct mlx5_eswitch *esw, struct vport_addr *vaddr)
 	u16 vport = vaddr->vport;
 	int err;
 
-	/* Skip mlx5_mpfs_add_mac for PFs,
-	 * it is already done by the PF netdev in mlx5e_execute_l2_action
+	/* Skip mlx5_mpfs_add_mac for eswitch_managers,
+	 * it is already done by its netdev in mlx5e_execute_l2_action
 	 */
-	if (!vport)
+	if (esw->manager_vport == vport)
 		goto fdb_add;
 
 	err = mlx5_mpfs_add_mac(esw->dev, mac);
 	if (err) {
 		esw_warn(esw->dev,
-			 "Failed to add L2 table mac(%pM) for vport(%d), err(%d)\n",
+			 "Failed to add L2 table mac(%pM) for vport(0x%x), err(%d)\n",
 			 mac, vport, err);
 		return err;
 	}
@@ -410,10 +410,10 @@ static int esw_del_uc_addr(struct mlx5_eswitch *esw, struct vport_addr *vaddr)
 	u16 vport = vaddr->vport;
 	int err = 0;
 
-	/* Skip mlx5_mpfs_del_mac for PFs,
-	 * it is already done by the PF netdev in mlx5e_execute_l2_action
+	/* Skip mlx5_mpfs_del_mac for eswitch managerss,
+	 * it is already done by its netdev in mlx5e_execute_l2_action
 	 */
-	if (!vport || !vaddr->mpfs)
+	if (!vaddr->mpfs || esw->manager_vport == vport)
 		goto fdb_del;
 
 	err = mlx5_mpfs_del_mac(esw->dev, mac);
@@ -1457,15 +1457,22 @@ static void esw_apply_vport_conf(struct mlx5_eswitch *esw,
 {
 	int vport_num = vport->vport;
 
-	if (!vport_num)
+	if (esw->manager_vport == vport_num)
 		return;
 
 	mlx5_modify_vport_admin_state(esw->dev,
 				      MLX5_VPORT_STATE_OP_MOD_ESW_VPORT,
 				      vport_num,
 				      vport->info.link_state);
-	mlx5_modify_nic_vport_mac_address(esw->dev, vport_num, vport->info.mac);
-	mlx5_modify_nic_vport_node_guid(esw->dev, vport_num, vport->info.node_guid);
+
+	/* Host PF has its own mac/guid. */
+	if (vport_num) {
+		mlx5_modify_nic_vport_mac_address(esw->dev, vport_num,
+						  vport->info.mac);
+		mlx5_modify_nic_vport_node_guid(esw->dev, vport_num,
+						vport->info.node_guid);
+	}
+
 	modify_esw_vport_cvlan(esw->dev, vport_num, vport->info.vlan, vport->info.qos,
 			       (vport->info.vlan || vport->info.qos));
 
@@ -1537,8 +1544,11 @@ static void esw_enable_vport(struct mlx5_eswitch *esw, int vport_num,
 	vport->enabled_events = enable_events;
 	vport->enabled = true;
 
-	/* only PF is trusted by default */
-	if (!vport_num)
+	/* Esw manager is trusted by default. Host PF (vport 0) is trusted as well
+	 * in smartNIC as it's a vport group manager.
+	 */
+	if (esw->manager_vport == vport_num ||
+	    (!vport_num && mlx5_core_is_ecpf(esw->dev)))
 		vport->info.trusted = true;
 
 	esw_vport_change_handle_locked(vport);
@@ -1733,6 +1743,7 @@ int mlx5_eswitch_init(struct mlx5_core_dev *dev)
 		return -ENOMEM;
 
 	esw->dev = dev;
+	esw->manager_vport = mlx5_eswitch_manager_vport(dev);
 
 	esw->work_queue = create_singlethread_workqueue("mlx5_esw_wq");
 	if (!esw->work_queue) {

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

@@ -38,6 +38,7 @@
 #include <net/devlink.h>
 #include <linux/mlx5/device.h>
 #include <linux/mlx5/eswitch.h>
+#include <linux/mlx5/vport.h>
 #include <linux/mlx5/fs.h>
 #include "lib/mpfs.h"
 
@@ -204,6 +205,7 @@ struct mlx5_eswitch {
 	struct mlx5_esw_offload offloads;
 	int                     mode;
 	int                     nvports;
+	u16                     manager_vport;
 };
 
 void esw_offloads_cleanup(struct mlx5_eswitch *esw, int nvports);
@@ -363,6 +365,14 @@ bool mlx5_esw_lag_prereq(struct mlx5_core_dev *dev0,
 
 #define esw_debug(dev, format, ...)				\
 	mlx5_core_dbg_mask(dev, MLX5_DEBUG_ESWITCH_MASK, format, ##__VA_ARGS__)
+
+/* The returned number is valid only when the dev is eswitch manager. */
+static inline u16 mlx5_eswitch_manager_vport(struct mlx5_core_dev *dev)
+{
+	return mlx5_core_is_ecpf_esw_manager(dev) ?
+		MLX5_VPORT_ECPF : MLX5_VPORT_PF;
+}
+
 #else  /* CONFIG_MLX5_ESWITCH */
 /* eswitch API stubs */
 static inline int  mlx5_eswitch_init(struct mlx5_core_dev *dev) { return 0; }

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

@@ -522,7 +522,8 @@ mlx5_eswitch_add_send_to_vport_rule(struct mlx5_eswitch *esw, int vport, u32 sqn
 
 	misc = MLX5_ADDR_OF(fte_match_param, spec->match_value, misc_parameters);
 	MLX5_SET(fte_match_set_misc, misc, source_sqn, sqn);
-	MLX5_SET(fte_match_set_misc, misc, source_port, 0x0); /* source vport is 0 */
+	/* source vport is the esw manager */
+	MLX5_SET(fte_match_set_misc, misc, source_port, esw->manager_vport);
 
 	misc = MLX5_ADDR_OF(fte_match_param, spec->match_criteria, misc_parameters);
 	MLX5_SET_TO_ONES(fte_match_set_misc, misc, source_sqn);
@@ -567,7 +568,7 @@ static void peer_miss_rules_setup(struct mlx5_core_dev *peer_dev,
 			 source_eswitch_owner_vhca_id);
 
 	dest->type = MLX5_FLOW_DESTINATION_TYPE_VPORT;
-	dest->vport.num = 0;
+	dest->vport.num = peer_dev->priv.eswitch->manager_vport;
 	dest->vport.vhca_id = MLX5_CAP_GEN(peer_dev, vhca_id);
 	dest->vport.flags |= MLX5_FLOW_DEST_VPORT_VHCA_ID;
 }
@@ -666,7 +667,7 @@ static int esw_add_fdb_miss_rule(struct mlx5_eswitch *esw)
 	dmac_c[0] = 0x01;
 
 	dest.type = MLX5_FLOW_DESTINATION_TYPE_VPORT;
-	dest.vport.num = 0;
+	dest.vport.num = esw->manager_vport;
 	flow_act.action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
 
 	flow_rule = mlx5_add_flow_rules(esw->fdb_table.offloads.slow_fdb, spec,

include/linux/mlx5/vport.h

@@ -52,6 +52,8 @@ enum {
 };
 
 enum {
+	MLX5_VPORT_PF			= 0x0,
+	MLX5_VPORT_ECPF			= 0xfffe,
 	MLX5_VPORT_UPLINK		= 0xffff
 };