lag.h

  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	possible_net_t net;
 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
 78static inline struct mlx5_lag *
 79mlx5_lag_dev(struct mlx5_core_dev *dev)
 80{
 81	return dev->priv.lag;
 82}
 83
 84static inline bool
 85__mlx5_lag_is_active(struct mlx5_lag *ldev)
 86{
 87	return ldev->mode != MLX5_LAG_MODE_NONE;
 88}
 89
 90static inline bool
 91mlx5_lag_is_ready(struct mlx5_lag *ldev)
 92{
 93	return test_bit(MLX5_LAG_FLAG_NDEVS_READY, &ldev->state_flags);
 94}
 95
 96bool mlx5_lag_shared_fdb_supported(struct mlx5_lag *ldev);
 97bool mlx5_lag_check_prereq(struct mlx5_lag *ldev);
 98void mlx5_modify_lag(struct mlx5_lag *ldev,
 99		     struct lag_tracker *tracker);
100int mlx5_activate_lag(struct mlx5_lag *ldev,
101		      struct lag_tracker *tracker,
102		      enum mlx5_lag_mode mode,
103		      bool shared_fdb);
104int mlx5_lag_dev_get_netdev_idx(struct mlx5_lag *ldev,
105				struct net_device *ndev);
106
107char *mlx5_get_str_port_sel_mode(enum mlx5_lag_mode mode, unsigned long flags);
108void mlx5_infer_tx_enabled(struct lag_tracker *tracker, struct mlx5_lag *ldev,
109			   u8 *ports, int *num_enabled);
110
111void mlx5_ldev_add_debugfs(struct mlx5_core_dev *dev);
112void mlx5_ldev_remove_debugfs(struct dentry *dbg);
113void mlx5_disable_lag(struct mlx5_lag *ldev);
114void mlx5_lag_remove_devices(struct mlx5_lag *ldev);
115int mlx5_deactivate_lag(struct mlx5_lag *ldev);
116void mlx5_lag_add_devices(struct mlx5_lag *ldev);
117struct mlx5_devcom_comp_dev *mlx5_lag_get_devcom_comp(struct mlx5_lag *ldev);
118
119static inline bool mlx5_lag_is_supported(struct mlx5_core_dev *dev)
120{
121	if (!MLX5_CAP_GEN(dev, vport_group_manager) ||
122	    !MLX5_CAP_GEN(dev, lag_master) ||
123	    MLX5_CAP_GEN(dev, num_lag_ports) < 2 ||
124	    mlx5_get_dev_index(dev) >= MLX5_MAX_PORTS ||
125	    MLX5_CAP_GEN(dev, num_lag_ports) > MLX5_MAX_PORTS)
126		return false;
127	return true;
128}
129
130#define mlx5_ldev_for_each(i, start_index, ldev) \
131	for (int tmp = start_index; tmp = mlx5_get_next_ldev_func(ldev, tmp), \
132	     i = tmp, tmp < MLX5_MAX_PORTS; tmp++)
133
134#define mlx5_ldev_for_each_reverse(i, start_index, end_index, ldev)      \
135	for (int tmp = start_index, tmp1 = end_index; \
136	     tmp = mlx5_get_pre_ldev_func(ldev, tmp, tmp1), \
137	     i = tmp, tmp >= tmp1; tmp--)
138
139int mlx5_get_pre_ldev_func(struct mlx5_lag *ldev, int start_idx, int end_idx);
140int mlx5_get_next_ldev_func(struct mlx5_lag *ldev, int start_idx);
141int mlx5_lag_get_dev_index_by_seq(struct mlx5_lag *ldev, int seq);
142int mlx5_lag_num_devs(struct mlx5_lag *ldev);
143int mlx5_lag_num_netdevs(struct mlx5_lag *ldev);
144#endif /* __MLX5_LAG_H__ */