netdev - [net-next 6/8] net/mlx5: Add devlink reload

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Date:   Tue, 12 Nov 2019 17:13:49 +0000
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Michael Guralnik <michaelgur@...lanox.com>,
        Jiri Pirko <jiri@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [net-next 6/8] net/mlx5: Add devlink reload

From: Michael Guralnik <michaelgur@...lanox.com>

Implement devlink reload for mlx5.

Usage example:
devlink dev reload pci/0000:06:00.0

Signed-off-by: Michael Guralnik <michaelgur@...lanox.com>
Acked-by: Jiri Pirko <jiri@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
 .../net/ethernet/mellanox/mlx5/core/devlink.c | 20 +++++++++++++++++++
 .../net/ethernet/mellanox/mlx5/core/main.c    |  4 ++--
 .../ethernet/mellanox/mlx5/core/mlx5_core.h   |  3 +++
 3 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
index b2c26388edb1..ac108f1e5bd6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
@@ -85,6 +85,22 @@ mlx5_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
 	return 0;
 }
 
+static int mlx5_devlink_reload_down(struct devlink *devlink, bool netns_change,
+				    struct netlink_ext_ack *extack)
+{
+	struct mlx5_core_dev *dev = devlink_priv(devlink);
+
+	return mlx5_unload_one(dev, false);
+}
+
+static int mlx5_devlink_reload_up(struct devlink *devlink,
+				  struct netlink_ext_ack *extack)
+{
+	struct mlx5_core_dev *dev = devlink_priv(devlink);
+
+	return mlx5_load_one(dev, false);
+}
+
 static const struct devlink_ops mlx5_devlink_ops = {
 #ifdef CONFIG_MLX5_ESWITCH
 	.eswitch_mode_set = mlx5_devlink_eswitch_mode_set,
@@ -96,6 +112,8 @@ static const struct devlink_ops mlx5_devlink_ops = {
 #endif
 	.flash_update = mlx5_devlink_flash_update,
 	.info_get = mlx5_devlink_info_get,
+	.reload_down = mlx5_devlink_reload_down,
+	.reload_up = mlx5_devlink_reload_up,
 };
 
 struct devlink *mlx5_devlink_alloc(void)
@@ -235,6 +253,7 @@ int mlx5_devlink_register(struct devlink *devlink, struct device *dev)
 		goto params_reg_err;
 	mlx5_devlink_set_params_init_values(devlink);
 	devlink_params_publish(devlink);
+	devlink_reload_enable(devlink);
 	return 0;
 
 params_reg_err:
@@ -244,6 +263,7 @@ int mlx5_devlink_register(struct devlink *devlink, struct device *dev)
 
 void mlx5_devlink_unregister(struct devlink *devlink)
 {
+	devlink_reload_disable(devlink);
 	devlink_params_unregister(devlink, mlx5_devlink_params,
 				  ARRAY_SIZE(mlx5_devlink_params));
 	devlink_unregister(devlink);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index c9a091d3226c..31fbfd6e8bb9 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -1168,7 +1168,7 @@ static void mlx5_unload(struct mlx5_core_dev *dev)
 	mlx5_put_uars_page(dev, dev->priv.uar);
 }
 
-static int mlx5_load_one(struct mlx5_core_dev *dev, bool boot)
+int mlx5_load_one(struct mlx5_core_dev *dev, bool boot)
 {
 	int err = 0;
 
@@ -1226,7 +1226,7 @@ static int mlx5_load_one(struct mlx5_core_dev *dev, bool boot)
 	return err;
 }
 
-static int mlx5_unload_one(struct mlx5_core_dev *dev, bool cleanup)
+int mlx5_unload_one(struct mlx5_core_dev *dev, bool cleanup)
 {
 	if (cleanup) {
 		mlx5_unregister_device(dev);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
index b100489dc85c..da67b28d6e23 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
@@ -243,4 +243,7 @@ enum {
 
 u8 mlx5_get_nic_state(struct mlx5_core_dev *dev);
 void mlx5_set_nic_state(struct mlx5_core_dev *dev, u8 state);
+
+int mlx5_unload_one(struct mlx5_core_dev *dev, bool cleanup);
+int mlx5_load_one(struct mlx5_core_dev *dev, bool boot);
 #endif /* __MLX5_CORE_H__ */
-- 
2.21.0