core/lag/lag.h

0001 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
0002 /* Copyright (c) 2019 Mellanox Technologies. */
0003
0004 #ifndef __MLX5_LAG_H__
0005 #define __MLX5_LAG_H__
0006
0007 #include <linux/debugfs.h>
0008
0009 #define MLX5_LAG_MAX_HASH_BUCKETS 16
0010 #include "mlx5_core.h"
0011 #include "mp.h"
0012 #include "port_sel.h"
0013 #include "mpesw.h"
0014
0015 enum {
0016     MLX5_LAG_P1,
0017     MLX5_LAG_P2,
0018 };
0019
0020 enum {
0021     MLX5_LAG_FLAG_NDEVS_READY,
0022 };
0023
0024 enum {
0025     MLX5_LAG_MODE_FLAG_HASH_BASED,
0026     MLX5_LAG_MODE_FLAG_SHARED_FDB,
0027     MLX5_LAG_MODE_FLAG_FDB_SEL_MODE_NATIVE,
0028 };
0029
0030 enum mlx5_lag_mode {
0031     MLX5_LAG_MODE_NONE,
0032     MLX5_LAG_MODE_ROCE,
0033     MLX5_LAG_MODE_SRIOV,
0034     MLX5_LAG_MODE_MULTIPATH,
0035     MLX5_LAG_MODE_MPESW,
0036 };
0037
0038 struct lag_func {
0039     struct mlx5_core_dev *dev;
0040     struct net_device    *netdev;
0041     bool has_drop;
0042 };
0043
0044 /* Used for collection of netdev event info. */
0045 struct lag_tracker {
0046     enum   netdev_lag_tx_type           tx_type;
0047     struct netdev_lag_lower_state_info  netdev_state[MLX5_MAX_PORTS];
0048     unsigned int is_bonded:1;
0049     unsigned int has_inactive:1;
0050     enum netdev_lag_hash hash_type;
0051 };
0052
0053 /* LAG data of a ConnectX card.
0054  * It serves both its phys functions.
0055  */
0056 struct mlx5_lag {
0057     enum mlx5_lag_mode        mode;
0058     unsigned long         mode_flags;
0059     unsigned long         state_flags;
0060     u8            ports;
0061     u8            buckets;
0062     int           mode_changes_in_progress;
0063     u8            v2p_map[MLX5_MAX_PORTS * MLX5_LAG_MAX_HASH_BUCKETS];
0064     struct kref               ref;
0065     struct lag_func           pf[MLX5_MAX_PORTS];
0066     struct lag_tracker        tracker;
0067     struct workqueue_struct   *wq;
0068     struct delayed_work       bond_work;
0069     struct work_struct    mpesw_work;
0070     struct notifier_block     nb;
0071     struct lag_mp             lag_mp;
0072     struct mlx5_lag_port_sel  port_sel;
0073     /* Protect lag fields/state changes */
0074     struct mutex          lock;
0075     struct lag_mpesw      lag_mpesw;
0076 };
0077
0078 static inline bool mlx5_is_lag_supported(struct mlx5_core_dev *dev)
0079 {
0080     if (!MLX5_CAP_GEN(dev, vport_group_manager) ||
0081         !MLX5_CAP_GEN(dev, lag_master) ||
0082         MLX5_CAP_GEN(dev, num_lag_ports) < 2 ||
0083         MLX5_CAP_GEN(dev, num_lag_ports) > MLX5_MAX_PORTS)
0084         return false;
0085     return true;
0086 }
0087
0088 static inline struct mlx5_lag *
0089 mlx5_lag_dev(struct mlx5_core_dev *dev)
0090 {
0091     return dev->priv.lag;
0092 }
0093
0094 static inline bool
0095 __mlx5_lag_is_active(struct mlx5_lag *ldev)
0096 {
0097     return ldev->mode != MLX5_LAG_MODE_NONE;
0098 }
0099
0100 static inline bool
0101 mlx5_lag_is_ready(struct mlx5_lag *ldev)
0102 {
0103     return test_bit(MLX5_LAG_FLAG_NDEVS_READY, &ldev->state_flags);
0104 }
0105
0106 void mlx5_modify_lag(struct mlx5_lag *ldev,
0107              struct lag_tracker *tracker);
0108 int mlx5_activate_lag(struct mlx5_lag *ldev,
0109               struct lag_tracker *tracker,
0110               enum mlx5_lag_mode mode,
0111               bool shared_fdb);
0112 int mlx5_lag_dev_get_netdev_idx(struct mlx5_lag *ldev,
0113                 struct net_device *ndev);
0114 bool mlx5_shared_fdb_supported(struct mlx5_lag *ldev);
0115 void mlx5_lag_del_mpesw_rule(struct mlx5_core_dev *dev);
0116 int mlx5_lag_add_mpesw_rule(struct mlx5_core_dev *dev);
0117
0118 char *mlx5_get_str_port_sel_mode(enum mlx5_lag_mode mode, unsigned long flags);
0119 void mlx5_infer_tx_enabled(struct lag_tracker *tracker, u8 num_ports,
0120                u8 *ports, int *num_enabled);
0121
0122 void mlx5_ldev_add_debugfs(struct mlx5_core_dev *dev);
0123 void mlx5_ldev_remove_debugfs(struct dentry *dbg);
0124 void mlx5_disable_lag(struct mlx5_lag *ldev);
0125
0126 #endif /* __MLX5_LAG_H__ */