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 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 bool mlx5_lag_is_supported(struct mlx5_core_dev *dev);
78 
79 static inline struct mlx5_lag *
80 mlx5_lag_dev(struct mlx5_core_dev *dev)
81 {
82 	return dev->priv.lag;
83 }
84 
85 static inline bool
86 __mlx5_lag_is_active(struct mlx5_lag *ldev)
87 {
88 	return ldev->mode != MLX5_LAG_MODE_NONE;
89 }
90 
91 static inline bool
92 mlx5_lag_is_ready(struct mlx5_lag *ldev)
93 {
94 	return test_bit(MLX5_LAG_FLAG_NDEVS_READY, &ldev->state_flags);
95 }
96 
97 bool mlx5_lag_check_prereq(struct mlx5_lag *ldev);
98 void mlx5_modify_lag(struct mlx5_lag *ldev,
99 		     struct lag_tracker *tracker);
100 int mlx5_activate_lag(struct mlx5_lag *ldev,
101 		      struct lag_tracker *tracker,
102 		      enum mlx5_lag_mode mode,
103 		      bool shared_fdb);
104 int mlx5_lag_dev_get_netdev_idx(struct mlx5_lag *ldev,
105 				struct net_device *ndev);
106 
107 char *mlx5_get_str_port_sel_mode(enum mlx5_lag_mode mode, unsigned long flags);
108 void mlx5_infer_tx_enabled(struct lag_tracker *tracker, u8 num_ports,
109 			   u8 *ports, int *num_enabled);
110 
111 void mlx5_ldev_add_debugfs(struct mlx5_core_dev *dev);
112 void mlx5_ldev_remove_debugfs(struct dentry *dbg);
113 void mlx5_disable_lag(struct mlx5_lag *ldev);
114 void mlx5_lag_remove_devices(struct mlx5_lag *ldev);
115 int mlx5_deactivate_lag(struct mlx5_lag *ldev);
116 void mlx5_lag_add_devices(struct mlx5_lag *ldev);
117 
118 #endif /* __MLX5_LAG_H__ */
119