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 enum mpesw_op {
54 	MLX5_MPESW_OP_ENABLE,
55 	MLX5_MPESW_OP_DISABLE,
56 };
57 
58 struct mlx5_mpesw_work_st {
59 	struct work_struct work;
60 	struct mlx5_lag    *lag;
61 	enum mpesw_op	   op;
62 	struct completion  comp;
63 	int result;
64 };
65 
66 /* LAG data of a ConnectX card.
67  * It serves both its phys functions.
68  */
69 struct mlx5_lag {
70 	enum mlx5_lag_mode        mode;
71 	unsigned long		  mode_flags;
72 	unsigned long		  state_flags;
73 	u8			  ports;
74 	u8			  buckets;
75 	int			  mode_changes_in_progress;
76 	u8			  v2p_map[MLX5_MAX_PORTS * MLX5_LAG_MAX_HASH_BUCKETS];
77 	struct kref               ref;
78 	struct lag_func           pf[MLX5_MAX_PORTS];
79 	struct lag_tracker        tracker;
80 	struct workqueue_struct   *wq;
81 	struct delayed_work       bond_work;
82 	struct notifier_block     nb;
83 	struct lag_mp             lag_mp;
84 	struct mlx5_lag_port_sel  port_sel;
85 	/* Protect lag fields/state changes */
86 	struct mutex		  lock;
87 	struct lag_mpesw	  lag_mpesw;
88 };
89 
90 static inline bool mlx5_is_lag_supported(struct mlx5_core_dev *dev)
91 {
92 	if (!MLX5_CAP_GEN(dev, vport_group_manager) ||
93 	    !MLX5_CAP_GEN(dev, lag_master) ||
94 	    MLX5_CAP_GEN(dev, num_lag_ports) < 2 ||
95 	    MLX5_CAP_GEN(dev, num_lag_ports) > MLX5_MAX_PORTS)
96 		return false;
97 	return true;
98 }
99 
100 static inline struct mlx5_lag *
101 mlx5_lag_dev(struct mlx5_core_dev *dev)
102 {
103 	return dev->priv.lag;
104 }
105 
106 static inline bool
107 __mlx5_lag_is_active(struct mlx5_lag *ldev)
108 {
109 	return ldev->mode != MLX5_LAG_MODE_NONE;
110 }
111 
112 static inline bool
113 mlx5_lag_is_ready(struct mlx5_lag *ldev)
114 {
115 	return test_bit(MLX5_LAG_FLAG_NDEVS_READY, &ldev->state_flags);
116 }
117 
118 void mlx5_modify_lag(struct mlx5_lag *ldev,
119 		     struct lag_tracker *tracker);
120 int mlx5_activate_lag(struct mlx5_lag *ldev,
121 		      struct lag_tracker *tracker,
122 		      enum mlx5_lag_mode mode,
123 		      bool shared_fdb);
124 int mlx5_lag_dev_get_netdev_idx(struct mlx5_lag *ldev,
125 				struct net_device *ndev);
126 bool mlx5_shared_fdb_supported(struct mlx5_lag *ldev);
127 void mlx5_lag_del_mpesw_rule(struct mlx5_core_dev *dev);
128 int mlx5_lag_add_mpesw_rule(struct mlx5_core_dev *dev);
129 
130 char *mlx5_get_str_port_sel_mode(enum mlx5_lag_mode mode, unsigned long flags);
131 void mlx5_infer_tx_enabled(struct lag_tracker *tracker, u8 num_ports,
132 			   u8 *ports, int *num_enabled);
133 
134 void mlx5_ldev_add_debugfs(struct mlx5_core_dev *dev);
135 void mlx5_ldev_remove_debugfs(struct dentry *dbg);
136 void mlx5_disable_lag(struct mlx5_lag *ldev);
137 
138 #endif /* __MLX5_LAG_H__ */
139