1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
2 /* Copyright (c) 2019 Mellanox Technologies. */
3 
4 #ifndef __MLX5_LAG_H__
5 #define __MLX5_LAG_H__
6 
7 #include <linux/debugfs.h>
8 
9 #define MLX5_LAG_MAX_HASH_BUCKETS 16
10 #include "mlx5_core.h"
11 #include "mp.h"
12 #include "port_sel.h"
13 #include "mpesw.h"
14 
15 enum {
16 	MLX5_LAG_P1,
17 	MLX5_LAG_P2,
18 };
19 
20 enum {
21 	MLX5_LAG_FLAG_NDEVS_READY,
22 };
23 
24 enum {
25 	MLX5_LAG_MODE_FLAG_HASH_BASED,
26 	MLX5_LAG_MODE_FLAG_SHARED_FDB,
27 };
28 
29 enum mlx5_lag_mode {
30 	MLX5_LAG_MODE_NONE,
31 	MLX5_LAG_MODE_ROCE,
32 	MLX5_LAG_MODE_SRIOV,
33 	MLX5_LAG_MODE_MULTIPATH,
34 	MLX5_LAG_MODE_MPESW,
35 };
36 
37 struct lag_func {
38 	struct mlx5_core_dev *dev;
39 	struct net_device    *netdev;
40 	bool has_drop;
41 };
42 
43 /* Used for collection of netdev event info. */
44 struct lag_tracker {
45 	enum   netdev_lag_tx_type           tx_type;
46 	struct netdev_lag_lower_state_info  netdev_state[MLX5_MAX_PORTS];
47 	unsigned int is_bonded:1;
48 	unsigned int has_inactive:1;
49 	enum netdev_lag_hash hash_type;
50 };
51 
52 /* LAG data of a ConnectX card.
53  * It serves both its phys functions.
54  */
55 struct mlx5_lag {
56 	enum mlx5_lag_mode        mode;
57 	unsigned long		  mode_flags;
58 	unsigned long		  state_flags;
59 	u8			  ports;
60 	u8			  buckets;
61 	int			  mode_changes_in_progress;
62 	u8			  v2p_map[MLX5_MAX_PORTS * MLX5_LAG_MAX_HASH_BUCKETS];
63 	struct kref               ref;
64 	struct lag_func           pf[MLX5_MAX_PORTS];
65 	struct lag_tracker        tracker;
66 	struct workqueue_struct   *wq;
67 	struct delayed_work       bond_work;
68 	struct work_struct	  mpesw_work;
69 	struct notifier_block     nb;
70 	struct lag_mp             lag_mp;
71 	struct mlx5_lag_port_sel  port_sel;
72 	/* Protect lag fields/state changes */
73 	struct mutex		  lock;
74 	struct lag_mpesw	  lag_mpesw;
75 };
76 
77 static inline bool mlx5_is_lag_supported(struct mlx5_core_dev *dev)
78 {
79 	if (!MLX5_CAP_GEN(dev, vport_group_manager) ||
80 	    !MLX5_CAP_GEN(dev, lag_master) ||
81 	    MLX5_CAP_GEN(dev, num_lag_ports) < 2 ||
82 	    MLX5_CAP_GEN(dev, num_lag_ports) > MLX5_MAX_PORTS)
83 		return false;
84 	return true;
85 }
86 
87 static inline struct mlx5_lag *
88 mlx5_lag_dev(struct mlx5_core_dev *dev)
89 {
90 	return dev->priv.lag;
91 }
92 
93 static inline bool
94 __mlx5_lag_is_active(struct mlx5_lag *ldev)
95 {
96 	return ldev->mode != MLX5_LAG_MODE_NONE;
97 }
98 
99 static inline bool
100 mlx5_lag_is_ready(struct mlx5_lag *ldev)
101 {
102 	return test_bit(MLX5_LAG_FLAG_NDEVS_READY, &ldev->state_flags);
103 }
104 
105 void mlx5_modify_lag(struct mlx5_lag *ldev,
106 		     struct lag_tracker *tracker);
107 int mlx5_activate_lag(struct mlx5_lag *ldev,
108 		      struct lag_tracker *tracker,
109 		      enum mlx5_lag_mode mode,
110 		      bool shared_fdb);
111 int mlx5_lag_dev_get_netdev_idx(struct mlx5_lag *ldev,
112 				struct net_device *ndev);
113 bool mlx5_shared_fdb_supported(struct mlx5_lag *ldev);
114 void mlx5_lag_del_mpesw_rule(struct mlx5_core_dev *dev);
115 int mlx5_lag_add_mpesw_rule(struct mlx5_core_dev *dev);
116 
117 char *mlx5_get_str_port_sel_mode(struct mlx5_lag *ldev);
118 void mlx5_infer_tx_enabled(struct lag_tracker *tracker, u8 num_ports,
119 			   u8 *ports, int *num_enabled);
120 
121 void mlx5_ldev_add_debugfs(struct mlx5_core_dev *dev);
122 void mlx5_ldev_remove_debugfs(struct dentry *dbg);
123 void mlx5_disable_lag(struct mlx5_lag *ldev);
124 
125 #endif /* __MLX5_LAG_H__ */
126