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path: root/drivers/net/ethernet/intel/ice/ice_lag.h
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Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_lag.h')
-rw-r--r--drivers/net/ethernet/intel/ice/ice_lag.h87
1 files changed, 87 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_lag.h b/drivers/net/ethernet/intel/ice/ice_lag.h
new file mode 100644
index 000000000000..c2e3688dd8fd
--- /dev/null
+++ b/drivers/net/ethernet/intel/ice/ice_lag.h
@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2018-2021, Intel Corporation. */
+
+#ifndef _ICE_LAG_H_
+#define _ICE_LAG_H_
+
+#include <linux/netdevice.h>
+
+/* LAG roles for netdev */
+enum ice_lag_role {
+ ICE_LAG_NONE,
+ ICE_LAG_PRIMARY,
+ ICE_LAG_BACKUP,
+ ICE_LAG_UNSET
+};
+
+struct ice_pf;
+
+/* LAG info struct */
+struct ice_lag {
+ struct ice_pf *pf; /* backlink to PF struct */
+ struct net_device *netdev; /* this PF's netdev */
+ struct net_device *peer_netdev;
+ struct net_device *upper_netdev; /* upper bonding netdev */
+ struct notifier_block notif_block;
+ u8 bonded:1; /* currently bonded */
+ u8 master:1; /* this is a master */
+ u8 handler:1; /* did we register a rx_netdev_handler */
+ /* each thing blocking bonding will increment this value by one.
+ * If this value is zero, then bonding is allowed.
+ */
+ u16 dis_lag;
+ u8 role;
+};
+
+int ice_init_lag(struct ice_pf *pf);
+void ice_deinit_lag(struct ice_pf *pf);
+rx_handler_result_t ice_lag_nop_handler(struct sk_buff **pskb);
+
+/**
+ * ice_disable_lag - increment LAG disable count
+ * @lag: LAG struct
+ */
+static inline void ice_disable_lag(struct ice_lag *lag)
+{
+ /* If LAG this PF is not already disabled, disable it */
+ rtnl_lock();
+ if (!netdev_is_rx_handler_busy(lag->netdev)) {
+ if (!netdev_rx_handler_register(lag->netdev,
+ ice_lag_nop_handler,
+ NULL))
+ lag->handler = true;
+ }
+ rtnl_unlock();
+ lag->dis_lag++;
+}
+
+/**
+ * ice_enable_lag - decrement disable count for a PF
+ * @lag: LAG struct
+ *
+ * Decrement the disable counter for a port, and if that count reaches
+ * zero, then remove the no-op Rx handler from that netdev
+ */
+static inline void ice_enable_lag(struct ice_lag *lag)
+{
+ if (lag->dis_lag)
+ lag->dis_lag--;
+ if (!lag->dis_lag && lag->handler) {
+ rtnl_lock();
+ netdev_rx_handler_unregister(lag->netdev);
+ rtnl_unlock();
+ lag->handler = false;
+ }
+}
+
+/**
+ * ice_is_lag_dis - is LAG disabled
+ * @lag: LAG struct
+ *
+ * Return true if bonding is disabled
+ */
+static inline bool ice_is_lag_dis(struct ice_lag *lag)
+{
+ return !!(lag->dis_lag);
+}
+#endif /* _ICE_LAG_H_ */