88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (C) 2018-2021, Intel Corporation. */
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#ifndef _ICE_LAG_H_
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#define _ICE_LAG_H_
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#include <linux/netdevice.h>
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/* LAG roles for netdev */
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enum ice_lag_role {
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ICE_LAG_NONE,
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ICE_LAG_PRIMARY,
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ICE_LAG_BACKUP,
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ICE_LAG_UNSET
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};
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struct ice_pf;
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/* LAG info struct */
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struct ice_lag {
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struct ice_pf *pf; /* backlink to PF struct */
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struct net_device *netdev; /* this PF's netdev */
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struct net_device *peer_netdev;
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struct net_device *upper_netdev; /* upper bonding netdev */
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struct notifier_block notif_block;
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u8 bonded:1; /* currently bonded */
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u8 primary:1; /* this is primary */
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u8 handler:1; /* did we register a rx_netdev_handler */
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/* each thing blocking bonding will increment this value by one.
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* If this value is zero, then bonding is allowed.
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*/
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u16 dis_lag;
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u8 role;
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};
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int ice_init_lag(struct ice_pf *pf);
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void ice_deinit_lag(struct ice_pf *pf);
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rx_handler_result_t ice_lag_nop_handler(struct sk_buff **pskb);
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/**
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* ice_disable_lag - increment LAG disable count
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* @lag: LAG struct
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*/
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static inline void ice_disable_lag(struct ice_lag *lag)
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{
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/* If LAG this PF is not already disabled, disable it */
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rtnl_lock();
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if (!netdev_is_rx_handler_busy(lag->netdev)) {
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if (!netdev_rx_handler_register(lag->netdev,
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ice_lag_nop_handler,
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NULL))
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lag->handler = true;
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}
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rtnl_unlock();
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lag->dis_lag++;
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}
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/**
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* ice_enable_lag - decrement disable count for a PF
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* @lag: LAG struct
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*
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* Decrement the disable counter for a port, and if that count reaches
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* zero, then remove the no-op Rx handler from that netdev
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*/
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static inline void ice_enable_lag(struct ice_lag *lag)
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{
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if (lag->dis_lag)
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lag->dis_lag--;
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if (!lag->dis_lag && lag->handler) {
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rtnl_lock();
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netdev_rx_handler_unregister(lag->netdev);
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rtnl_unlock();
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lag->handler = false;
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}
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}
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/**
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* ice_is_lag_dis - is LAG disabled
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* @lag: LAG struct
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*
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* Return true if bonding is disabled
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*/
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static inline bool ice_is_lag_dis(struct ice_lag *lag)
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{
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return !!(lag->dis_lag);
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}
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#endif /* _ICE_LAG_H_ */
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