netdev - [net-next 04/15] net/mlx5e: Add Ethernet driver debugfs

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Date:   Tue, 10 Jan 2023 21:30:34 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>
Cc:     Saeed Mahameed <saeedm@...dia.com>, netdev@...r.kernel.org,
        Tariq Toukan <tariqt@...dia.com>, Gal Pressman <gal@...dia.com>
Subject: [net-next 04/15] net/mlx5e: Add Ethernet driver debugfs

From: Gal Pressman <gal@...dia.com>

Similar to the mlx5_core debugfs, lay the groundwork for mlx5e debugfs
files under /sys/kernel/debug/mlx5/<pci>/nic/..

Signed-off-by: Gal Pressman <gal@...dia.com>
Reviewed-by: Tariq Toukan <tariqt@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en.h      | 1 +
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 2d77fb8a8a01..7cbd71f0b8ae 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -968,6 +968,7 @@ struct mlx5e_priv {
 	struct mlx5e_scratchpad    scratchpad;
 	struct mlx5e_htb          *htb;
 	struct mlx5e_mqprio_rl    *mqprio_rl;
+	struct dentry             *dfs_root;
 };
 
 struct mlx5e_rx_handlers {
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index cff5f2e29e1e..16c8bbad5b33 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -35,6 +35,7 @@
 #include <net/vxlan.h>
 #include <net/geneve.h>
 #include <linux/bpf.h>
+#include <linux/debugfs.h>
 #include <linux/if_bridge.h>
 #include <linux/filter.h>
 #include <net/page_pool.h>
@@ -5931,6 +5932,9 @@ static int mlx5e_probe(struct auxiliary_device *adev,
 	priv->profile = profile;
 	priv->ppriv = NULL;
 
+	priv->dfs_root = debugfs_create_dir("nic",
+					    mlx5_debugfs_get_dev_root(priv->mdev));
+
 	err = mlx5e_devlink_port_register(priv);
 	if (err) {
 		mlx5_core_err(mdev, "mlx5e_devlink_port_register failed, %d\n", err);
@@ -5968,6 +5972,7 @@ static int mlx5e_probe(struct auxiliary_device *adev,
 err_devlink_cleanup:
 	mlx5e_devlink_port_unregister(priv);
 err_destroy_netdev:
+	debugfs_remove_recursive(priv->dfs_root);
 	mlx5e_destroy_netdev(priv);
 	return err;
 }
@@ -5982,6 +5987,7 @@ static void mlx5e_remove(struct auxiliary_device *adev)
 	mlx5e_suspend(adev, state);
 	priv->profile->cleanup(priv);
 	mlx5e_devlink_port_unregister(priv);
+	debugfs_remove_recursive(priv->dfs_root);
 	mlx5e_destroy_netdev(priv);
 }
 
-- 
2.39.0