mlxsw: spectrum: Change stats cache to be local

Change the HW stats cache to be local. Rename it for better clarity.
It holds the results of the last result of HW stats that are being read
periodically, in order to have answer for stats request immediately.

Signed-off-by: Nogah Frankel <nogahf@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 17 deletions

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index 12b6ac487d8d..021926974da6 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -1328,16 +1328,16 @@ static void update_stats_cache(struct work_struct *work)
 {
 	struct mlxsw_sp_port *mlxsw_sp_port =
 		container_of(work, struct mlxsw_sp_port,
-			     hw_stats.update_dw.work);
+			     periodic_hw_stats.update_dw.work);
 
 	if (!netif_carrier_ok(mlxsw_sp_port->dev))
 		goto out;
 
 	mlxsw_sp_port_get_hw_stats(mlxsw_sp_port->dev,
-				   mlxsw_sp_port->hw_stats.cache);
+				   &mlxsw_sp_port->periodic_hw_stats.stats);
 
 out:
-	mlxsw_core_schedule_dw(&mlxsw_sp_port->hw_stats.update_dw,
+	mlxsw_core_schedule_dw(&mlxsw_sp_port->periodic_hw_stats.update_dw,
 			       MLXSW_HW_STATS_UPDATE_TIME);
 }
 
@@ -1350,7 +1350,7 @@ mlxsw_sp_port_get_stats64(struct net_device *dev,
 {
 	struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(dev);
 
-	memcpy(stats, mlxsw_sp_port->hw_stats.cache, sizeof(*stats));
+	memcpy(stats, &mlxsw_sp_port->periodic_hw_stats.stats, sizeof(*stats));
 }
 
 static int __mlxsw_sp_port_vlan_set(struct mlxsw_sp_port *mlxsw_sp_port,
@@ -2905,14 +2905,7 @@ static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u8 local_port,
 		goto err_alloc_sample;
 	}
 
-	mlxsw_sp_port->hw_stats.cache =
-		kzalloc(sizeof(*mlxsw_sp_port->hw_stats.cache), GFP_KERNEL);
-
-	if (!mlxsw_sp_port->hw_stats.cache) {
-		err = -ENOMEM;
-		goto err_alloc_hw_stats;
-	}
-	INIT_DELAYED_WORK(&mlxsw_sp_port->hw_stats.update_dw,
+	INIT_DELAYED_WORK(&mlxsw_sp_port->periodic_hw_stats.update_dw,
 			  &update_stats_cache);
 
 	dev->netdev_ops = &mlxsw_sp_port_netdev_ops;
@@ -3026,7 +3019,7 @@ static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u8 local_port,
 	mlxsw_core_port_eth_set(mlxsw_sp->core, mlxsw_sp_port->local_port,
 				mlxsw_sp_port, dev, mlxsw_sp_port->split,
 				module);
-	mlxsw_core_schedule_dw(&mlxsw_sp_port->hw_stats.update_dw, 0);
+	mlxsw_core_schedule_dw(&mlxsw_sp_port->periodic_hw_stats.update_dw, 0);
 	return 0;
 
 err_register_netdev:
@@ -3049,8 +3042,6 @@ err_dev_addr_init:
 err_port_swid_set:
 	mlxsw_sp_port_module_unmap(mlxsw_sp_port);
 err_port_module_map:
-	kfree(mlxsw_sp_port->hw_stats.cache);
-err_alloc_hw_stats:
 	kfree(mlxsw_sp_port->sample);
 err_alloc_sample:
 	free_percpu(mlxsw_sp_port->pcpu_stats);
@@ -3065,7 +3056,7 @@ static void mlxsw_sp_port_remove(struct mlxsw_sp *mlxsw_sp, u8 local_port)
 {
 	struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp->ports[local_port];
 
-	cancel_delayed_work_sync(&mlxsw_sp_port->hw_stats.update_dw);
+	cancel_delayed_work_sync(&mlxsw_sp_port->periodic_hw_stats.update_dw);
 	mlxsw_core_port_clear(mlxsw_sp->core, local_port, mlxsw_sp);
 	unregister_netdev(mlxsw_sp_port->dev); /* This calls ndo_stop */
 	mlxsw_sp->ports[local_port] = NULL;
@@ -3075,7 +3066,6 @@ static void mlxsw_sp_port_remove(struct mlxsw_sp *mlxsw_sp, u8 local_port)
 	mlxsw_sp_port_dcb_fini(mlxsw_sp_port);
 	mlxsw_sp_port_swid_set(mlxsw_sp_port, MLXSW_PORT_SWID_DISABLED_PORT);
 	mlxsw_sp_port_module_unmap(mlxsw_sp_port);
-	kfree(mlxsw_sp_port->hw_stats.cache);
 	kfree(mlxsw_sp_port->sample);
 	free_percpu(mlxsw_sp_port->pcpu_stats);
 	WARN_ON_ONCE(!list_empty(&mlxsw_sp_port->vlans_list));