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
15enum {
16	MLX5_LAG_P1,
17	MLX5_LAG_P2,
18};
19
20enum {
21	MLX5_LAG_FLAG_NDEVS_READY,
22};
23
24enum {
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
30enum 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
38struct 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. */
45struct 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 */
56struct 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
77static inline struct mlx5_lag *
78mlx5_lag_dev(struct mlx5_core_dev *dev)
79{
80	return dev->priv.lag;
81}
82
83static inline bool
84__mlx5_lag_is_active(struct mlx5_lag *ldev)
85{
86	return ldev->mode != MLX5_LAG_MODE_NONE;
87}
88
89static inline bool
90mlx5_lag_is_ready(struct mlx5_lag *ldev)
91{
92	return test_bit(MLX5_LAG_FLAG_NDEVS_READY, &ldev->state_flags);
93}
94
95bool mlx5_lag_check_prereq(struct mlx5_lag *ldev);
96void mlx5_modify_lag(struct mlx5_lag *ldev,
97		     struct lag_tracker *tracker);
98int mlx5_activate_lag(struct mlx5_lag *ldev,
99		      struct lag_tracker *tracker,
100		      enum mlx5_lag_mode mode,
101		      bool shared_fdb);
102int mlx5_lag_dev_get_netdev_idx(struct mlx5_lag *ldev,
103				struct net_device *ndev);
104
105char *mlx5_get_str_port_sel_mode(enum mlx5_lag_mode mode, unsigned long flags);
106void mlx5_infer_tx_enabled(struct lag_tracker *tracker, u8 num_ports,
107			   u8 *ports, int *num_enabled);
108
109void mlx5_ldev_add_debugfs(struct mlx5_core_dev *dev);
110void mlx5_ldev_remove_debugfs(struct dentry *dbg);
111void mlx5_disable_lag(struct mlx5_lag *ldev);
112void mlx5_lag_remove_devices(struct mlx5_lag *ldev);
113int mlx5_deactivate_lag(struct mlx5_lag *ldev);
114void mlx5_lag_add_devices(struct mlx5_lag *ldev);
115struct mlx5_devcom_comp_dev *mlx5_lag_get_devcom_comp(struct mlx5_lag *ldev);
116
117static inline bool mlx5_lag_is_supported(struct mlx5_core_dev *dev)
118{
119	if (!MLX5_CAP_GEN(dev, vport_group_manager) ||
120	    !MLX5_CAP_GEN(dev, lag_master) ||
121	    MLX5_CAP_GEN(dev, num_lag_ports) < 2 ||
122	    MLX5_CAP_GEN(dev, num_lag_ports) > MLX5_MAX_PORTS)
123		return false;
124	return true;
125}
126
127#endif /* __MLX5_LAG_H__ */
128