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 	MLX5_LAG_MODE_FLAG_FDB_SEL_MODE_NATIVE,
28 };
29 
30 enum mlx5_lag_mode {
31 	MLX5_LAG_MODE_NONE,
32 	MLX5_LAG_MODE_ROCE,
33 	MLX5_LAG_MODE_SRIOV,
34 	MLX5_LAG_MODE_MULTIPATH,
35 	MLX5_LAG_MODE_MPESW,
36 };
37 
38 struct lag_func {
39 	struct mlx5_core_dev *dev;
40 	struct net_device    *netdev;
41 	bool has_drop;
42 };
43 
44 /* Used for collection of netdev event info. */
45 struct lag_tracker {
46 	enum   netdev_lag_tx_type           tx_type;
47 	struct netdev_lag_lower_state_info  netdev_state[MLX5_MAX_PORTS];
48 	unsigned int is_bonded:1;
49 	unsigned int has_inactive:1;
50 	enum netdev_lag_hash hash_type;
51 };
52 
53 /* LAG data of a ConnectX card.
54  * It serves both its phys functions.
55  */
56 struct mlx5_lag {
57 	enum mlx5_lag_mode        mode;
58 	unsigned long		  mode_flags;
59 	unsigned long		  state_flags;
60 	u8			  ports;
61 	u8			  buckets;
62 	int			  mode_changes_in_progress;
63 	u8			  v2p_map[MLX5_MAX_PORTS * MLX5_LAG_MAX_HASH_BUCKETS];
64 	struct kref               ref;
65 	struct lag_func           pf[MLX5_MAX_PORTS];
66 	struct lag_tracker        tracker;
67 	struct workqueue_struct   *wq;
68 	struct delayed_work       bond_work;
69 	struct work_struct	  mpesw_work;
70 	struct notifier_block     nb;
71 	struct lag_mp             lag_mp;
72 	struct mlx5_lag_port_sel  port_sel;
73 	/* Protect lag fields/state changes */
74 	struct mutex		  lock;
75 	struct lag_mpesw	  lag_mpesw;
76 };
77 
78 static inline bool mlx5_is_lag_supported(struct mlx5_core_dev *dev)
79 {
80 	if (!MLX5_CAP_GEN(dev, vport_group_manager) ||
81 	    !MLX5_CAP_GEN(dev, lag_master) ||
82 	    MLX5_CAP_GEN(dev, num_lag_ports) < 2 ||
83 	    MLX5_CAP_GEN(dev, num_lag_ports) > MLX5_MAX_PORTS)
84 		return false;
85 	return true;
86 }
87 
88 static inline struct mlx5_lag *
89 mlx5_lag_dev(struct mlx5_core_dev *dev)
90 {
91 	return dev->priv.lag;
92 }
93 
94 static inline bool
95 __mlx5_lag_is_active(struct mlx5_lag *ldev)
96 {
97 	return ldev->mode != MLX5_LAG_MODE_NONE;
98 }
99 
100 static inline bool
101 mlx5_lag_is_ready(struct mlx5_lag *ldev)
102 {
103 	return test_bit(MLX5_LAG_FLAG_NDEVS_READY, &ldev->state_flags);
104 }
105 
106 void mlx5_modify_lag(struct mlx5_lag *ldev,
107 		     struct lag_tracker *tracker);
108 int mlx5_activate_lag(struct mlx5_lag *ldev,
109 		      struct lag_tracker *tracker,
110 		      enum mlx5_lag_mode mode,
111 		      bool shared_fdb);
112 int mlx5_lag_dev_get_netdev_idx(struct mlx5_lag *ldev,
113 				struct net_device *ndev);
114 bool mlx5_shared_fdb_supported(struct mlx5_lag *ldev);
115 void mlx5_lag_del_mpesw_rule(struct mlx5_core_dev *dev);
116 int mlx5_lag_add_mpesw_rule(struct mlx5_core_dev *dev);
117 
118 char *mlx5_get_str_port_sel_mode(enum mlx5_lag_mode mode, unsigned long flags);
119 void mlx5_infer_tx_enabled(struct lag_tracker *tracker, u8 num_ports,
120 			   u8 *ports, int *num_enabled);
121 
122 void mlx5_ldev_add_debugfs(struct mlx5_core_dev *dev);
123 void mlx5_ldev_remove_debugfs(struct dentry *dbg);
124 void mlx5_disable_lag(struct mlx5_lag *ldev);
125 
126 #endif /* __MLX5_LAG_H__ */
127