1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag/mpesw.c b/drivers/net/ethernet/mellanox/mlx5/core/lag/mpesw.c
new file mode 100644
index 000000000000..f643202b29c6
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lag/mpesw.c
@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/* Copyright (c) 2022, NVIDIA CORPORATION & AFFILIATES. All rights reserved. */
+
+#include <linux/netdevice.h>
+#include <net/nexthop.h>
+#include "lag/lag.h"
+#include "eswitch.h"
+#include "lib/mlx5.h"
+
+void mlx5_mpesw_work(struct work_struct *work)
+{
+	struct mlx5_lag *ldev = container_of(work, struct mlx5_lag, mpesw_work);
+
+	mutex_lock(&ldev->lock);
+	mlx5_disable_lag(ldev);
+	mutex_unlock(&ldev->lock);
+}
+
+static void mlx5_lag_disable_mpesw(struct mlx5_core_dev *dev)
+{
+	struct mlx5_lag *ldev = dev->priv.lag;
+
+	if (!queue_work(ldev->wq, &ldev->mpesw_work))
+		mlx5_core_warn(dev, "failed to queue work\n");
+}
+
+void mlx5_lag_del_mpesw_rule(struct mlx5_core_dev *dev)
+{
+	struct mlx5_lag *ldev = dev->priv.lag;
+
+	if (!ldev)
+		return;
+
+	mutex_lock(&ldev->lock);
+	if (!atomic_dec_return(&ldev->lag_mpesw.mpesw_rule_count) &&
+	    ldev->mode == MLX5_LAG_MODE_MPESW)
+		mlx5_lag_disable_mpesw(dev);
+	mutex_unlock(&ldev->lock);
+}
+
+int mlx5_lag_add_mpesw_rule(struct mlx5_core_dev *dev)
+{
+	struct mlx5_lag *ldev = dev->priv.lag;
+	int err = 0;
+
+	if (!ldev)
+		return 0;
+
+	mutex_lock(&ldev->lock);
+	if (atomic_add_return(1, &ldev->lag_mpesw.mpesw_rule_count) != 1)
+		goto out;
+
+	if (ldev->mode != MLX5_LAG_MODE_NONE) {
+		err = -EINVAL;
+		goto out;
+	}
+
+	err = mlx5_activate_lag(ldev, NULL, MLX5_LAG_MODE_MPESW, false);
+	if (err)
+		mlx5_core_warn(dev, "Failed to create LAG in MPESW mode (%d)\n", err);
+
+out:
+	mutex_unlock(&ldev->lock);
+	return err;
+}
+
+int mlx5_lag_do_mirred(struct mlx5_core_dev *mdev, struct net_device *out_dev)
+{
+	struct mlx5_lag *ldev = mdev->priv.lag;
+
+	if (!netif_is_bond_master(out_dev) || !ldev)
+		return 0;
+
+	mutex_lock(&ldev->lock);
+	if (ldev->mode == MLX5_LAG_MODE_MPESW) {
+		mutex_unlock(&ldev->lock);
+		return -EOPNOTSUPP;
+	}
+	mutex_unlock(&ldev->lock);
+	return 0;
+}
+
+bool mlx5_lag_mpesw_is_activated(struct mlx5_core_dev *dev)
+{
+	bool ret;
+
+	ret = dev->priv.lag && dev->priv.lag->mode == MLX5_LAG_MODE_MPESW;
+	return ret;
+}
+
+void mlx5_lag_mpesw_init(struct mlx5_lag *ldev)
+{
+	INIT_WORK(&ldev->mpesw_work, mlx5_mpesw_work);
+	atomic_set(&ldev->lag_mpesw.mpesw_rule_count, 0);
+}
+
+void mlx5_lag_mpesw_cleanup(struct mlx5_lag *ldev)
+{
+	cancel_delayed_work_sync(&ldev->bond_work);
+}