[RFC net-next 09/13] mlxsw: switchx2: Handle SWITCHDEV_PORT_ATTR_GET event

[Florian Fainelli]

Following patches will change the way we communicate getting or setting
a port's attribute and use a blocking notifier to perform those tasks.

Prepare bnxt to support receiving notifier events targeting
SWITCHDEV_PORT_ATTR_GET and simply translate that into the existing
switchdev_ops::switchdev_port_attr_get operation.

We register a single blocking switchdev notifier for the entire driver
instance and check that thet network device maps to the one that
switchx2 manages.

Signed-off-by: Florian Fainelli <f.faine...@gmail.com>
---
 .../net/ethernet/mellanox/mlxsw/switchx2.c    | 43 ++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/switchx2.c 
b/drivers/net/ethernet/mellanox/mlxsw/switchx2.c
index 2d4f213e154d..82fb8f1bb6e9 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/switchx2.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/switchx2.c
@@ -923,6 +923,36 @@ static const struct switchdev_ops 
mlxsw_sx_port_switchdev_ops = {
        .switchdev_port_attr_get        = mlxsw_sx_port_attr_get,
 };
 
+static int mlxsw_sx_port_attr_event(unsigned long event,
+               struct net_device *dev,
+               struct switchdev_notifier_port_attr_info *port_attr_info)
+{
+       int rc;
+
+       if (event != SWITCHDEV_PORT_ATTR_GET)
+               return NOTIFY_DONE;
+
+       rc = mlxsw_sx_port_attr_get(dev, port_attr_info->attr);
+       port_attr_info->handled = true;
+       return notifier_from_errno(rc);
+}
+
+static int mlxsw_sx_swdev_blocking_event(struct notifier_block *nb,
+                                        unsigned long event, void *ptr)
+{
+       struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
+
+       if (dev->netdev_ops != &mlxsw_sx_port_netdev_ops)
+               return NOTIFY_DONE;
+
+       switch (event) {
+       case SWITCHDEV_PORT_ATTR_GET:
+               return mlxsw_sx_port_attr_event(event, dev, ptr);
+       }
+
+       return NOTIFY_DONE;
+}
+
 static int mlxsw_sx_hw_id_get(struct mlxsw_sx *mlxsw_sx)
 {
        char spad_pl[MLXSW_REG_SPAD_LEN] = {0};
@@ -1638,6 +1668,10 @@ static void mlxsw_sx_fini(struct mlxsw_core *mlxsw_core)
        mlxsw_sx_ports_remove(mlxsw_sx);
 }
 
+static struct notifier_block mlxsw_sx_swdev_nb = {
+       .notifier_call  = mlxsw_sx_swdev_blocking_event,
+};
+
 static const struct mlxsw_config_profile mlxsw_sx_config_profile = {
        .used_max_vepa_channels         = 1,
        .max_vepa_channels              = 0,
@@ -1698,10 +1732,14 @@ static int __init mlxsw_sx_module_init(void)
 {
        int err;
 
-       err = mlxsw_core_driver_register(&mlxsw_sx_driver);
+       err = register_switchdev_blocking_notifier(&mlxsw_sx_swdev_nb);
        if (err)
                return err;
 
+       err = mlxsw_core_driver_register(&mlxsw_sx_driver);
+       if (err)
+               goto err_unregister_notifier;
+
        err = mlxsw_pci_driver_register(&mlxsw_sx_pci_driver);
        if (err)
                goto err_pci_driver_register;
@@ -1710,6 +1748,8 @@ static int __init mlxsw_sx_module_init(void)
 
 err_pci_driver_register:
        mlxsw_core_driver_unregister(&mlxsw_sx_driver);
+err_unregister_notifier:
+       unregister_switchdev_blocking_notifier(&mlxsw_sx_swdev_nb);
        return err;
 }
 
@@ -1717,6 +1757,7 @@ static void __exit mlxsw_sx_module_exit(void)
 {
        mlxsw_pci_driver_unregister(&mlxsw_sx_pci_driver);
        mlxsw_core_driver_unregister(&mlxsw_sx_driver);
+       unregister_switchdev_blocking_notifier(&mlxsw_sx_swdev_nb);
 }
 
 module_init(mlxsw_sx_module_init);
-- 
2.17.1

_______________________________________________
devel mailing list
de...@linuxdriverproject.org
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel