[PATCH v13 net-next 4/9] net: ena: Add devlink port support

[David Arinzon <darinzon@amazon.com>]

Add the basic functionality to support devlink port
for devlink model completeness purposes.
Current support is for registration/un-registration.

Signed-off-by: David Arinzon <darinzon@amazon.com>
---
 drivers/net/ethernet/amazon/ena/ena_devlink.c | 31 +++++++++++++++++--
 drivers/net/ethernet/amazon/ena/ena_netdev.h  |  1 +
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_devlink.c b/drivers/net/ethernet/amazon/ena/ena_devlink.c
index db56916c..1aa977a6 100644
--- a/drivers/net/ethernet/amazon/ena/ena_devlink.c
+++ b/drivers/net/ethernet/amazon/ena/ena_devlink.c
@@ -6,6 +6,23 @@
 #include "linux/pci.h"
 #include "ena_devlink.h"
 
+static void ena_devlink_port_register(struct devlink *devlink)
+{
+	struct ena_adapter *adapter = ENA_DEVLINK_PRIV(devlink);
+	struct devlink_port_attrs attrs = {};
+
+	attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
+	devlink_port_attrs_set(&adapter->devlink_port, &attrs);
+	devl_port_register(devlink, &adapter->devlink_port, 0);
+}
+
+static void ena_devlink_port_unregister(struct devlink *devlink)
+{
+	struct ena_adapter *adapter = ENA_DEVLINK_PRIV(devlink);
+
+	devl_port_unregister(&adapter->devlink_port);
+}
+
 static int ena_devlink_reload_down(struct devlink *devlink,
 				   bool netns_change,
 				   enum devlink_reload_action action,
@@ -20,6 +37,8 @@ static int ena_devlink_reload_down(struct devlink *devlink,
 		return -EOPNOTSUPP;
 	}
 
+	ena_devlink_port_unregister(devlink);
+
 	rtnl_lock();
 	ena_destroy_device(adapter, false);
 	rtnl_unlock();
@@ -46,6 +65,8 @@ static int ena_devlink_reload_up(struct devlink *devlink,
 
 	rtnl_unlock();
 
+	ena_devlink_port_register(devlink);
+
 	if (!err)
 		*actions_performed = BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT);
 
@@ -85,10 +106,16 @@ void ena_devlink_free(struct devlink *devlink)
 
 void ena_devlink_register(struct devlink *devlink, struct device *dev)
 {
-	devlink_register(devlink);
+	devl_lock(devlink);
+	ena_devlink_port_register(devlink);
+	devl_register(devlink);
+	devl_unlock(devlink);
 }
 
 void ena_devlink_unregister(struct devlink *devlink)
 {
-	devlink_unregister(devlink);
+	devl_lock(devlink);
+	ena_devlink_port_unregister(devlink);
+	devl_unregister(devlink);
+	devl_unlock(devlink);
 }
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.h b/drivers/net/ethernet/amazon/ena/ena_netdev.h
index a732a19e..cba67867 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.h
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.h
@@ -390,6 +390,7 @@ struct ena_adapter {
 	u32 xdp_num_queues;
 
 	struct devlink *devlink;
+	struct devlink_port devlink_port;
 };
 
 void ena_set_ethtool_ops(struct net_device *netdev);
-- 
2.47.1