1 /*
2 * Copyright (c) 2017, Mellanox Technologies. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33 #ifndef __MLX5E_REP_H__
34 #define __MLX5E_REP_H__
35
36 #include <net/ip_tunnels.h>
37 #include <linux/rhashtable.h>
38 #include "eswitch.h"
39 #include "en.h"
40
41 #ifdef CONFIG_MLX5_ESWITCH
42 struct mlx5e_neigh_update_table {
43 struct rhashtable neigh_ht;
44 /* Save the neigh hash entries in a list in addition to the hash table
45 * (neigh_ht). In order to iterate easily over the neigh entries.
46 * Used for stats query.
47 */
48 struct list_head neigh_list;
49 /* protect lookup/remove operations */
50 spinlock_t encap_lock;
51 struct notifier_block netevent_nb;
52 struct delayed_work neigh_stats_work;
53 unsigned long min_interval; /* jiffies */
54 };
55
56 struct mlx5e_rep_priv {
57 struct mlx5_eswitch_rep *rep;
58 struct mlx5e_neigh_update_table neigh_update;
59 struct net_device *netdev;
60 struct mlx5_flow_handle *vport_rx_rule;
61 struct list_head vport_sqs_list;
62 struct rhashtable tc_ht; /* valid for uplink rep */
63 };
64
65 static inline
mlx5e_rep_to_rep_priv(struct mlx5_eswitch_rep * rep)66 struct mlx5e_rep_priv *mlx5e_rep_to_rep_priv(struct mlx5_eswitch_rep *rep)
67 {
68 return (struct mlx5e_rep_priv *)rep->rep_if[REP_ETH].priv;
69 }
70
71 struct mlx5e_neigh {
72 struct net_device *dev;
73 union {
74 __be32 v4;
75 struct in6_addr v6;
76 } dst_ip;
77 int family;
78 };
79
80 struct mlx5e_neigh_hash_entry {
81 struct rhash_head rhash_node;
82 struct mlx5e_neigh m_neigh;
83
84 /* Save the neigh hash entry in a list on the representor in
85 * addition to the hash table. In order to iterate easily over the
86 * neighbour entries. Used for stats query.
87 */
88 struct list_head neigh_list;
89
90 /* encap list sharing the same neigh */
91 struct list_head encap_list;
92
93 /* valid only when the neigh reference is taken during
94 * neigh_update_work workqueue callback.
95 */
96 struct neighbour *n;
97 struct work_struct neigh_update_work;
98
99 /* neigh hash entry can be deleted only when the refcount is zero.
100 * refcount is needed to avoid neigh hash entry removal by TC, while
101 * it's used by the neigh notification call.
102 */
103 refcount_t refcnt;
104
105 /* Save the last reported time offloaded trafic pass over one of the
106 * neigh hash entry flows. Use it to periodically update the neigh
107 * 'used' value and avoid neigh deleting by the kernel.
108 */
109 unsigned long reported_lastuse;
110 };
111
112 enum {
113 /* set when the encap entry is successfully offloaded into HW */
114 MLX5_ENCAP_ENTRY_VALID = BIT(0),
115 };
116
117 struct mlx5e_encap_entry {
118 /* neigh hash entry list of encaps sharing the same neigh */
119 struct list_head encap_list;
120 struct mlx5e_neigh m_neigh;
121 /* a node of the eswitch encap hash table which keeping all the encap
122 * entries
123 */
124 struct hlist_node encap_hlist;
125 struct list_head flows;
126 u32 encap_id;
127 struct ip_tunnel_info tun_info;
128 unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
129
130 struct net_device *out_dev;
131 int tunnel_type;
132 u8 flags;
133 char *encap_header;
134 int encap_size;
135 };
136
137 struct mlx5e_rep_sq {
138 struct mlx5_flow_handle *send_to_vport_rule;
139 struct list_head list;
140 };
141
142 void *mlx5e_alloc_nic_rep_priv(struct mlx5_core_dev *mdev);
143 void mlx5e_register_vport_reps(struct mlx5e_priv *priv);
144 void mlx5e_unregister_vport_reps(struct mlx5e_priv *priv);
145 bool mlx5e_is_uplink_rep(struct mlx5e_priv *priv);
146 int mlx5e_add_sqs_fwd_rules(struct mlx5e_priv *priv);
147 void mlx5e_remove_sqs_fwd_rules(struct mlx5e_priv *priv);
148
149 int mlx5e_get_offload_stats(int attr_id, const struct net_device *dev, void *sp);
150 bool mlx5e_has_offload_stats(const struct net_device *dev, int attr_id);
151
152 int mlx5e_attr_get(struct net_device *dev, struct switchdev_attr *attr);
153 void mlx5e_handle_rx_cqe_rep(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe);
154
155 int mlx5e_rep_encap_entry_attach(struct mlx5e_priv *priv,
156 struct mlx5e_encap_entry *e);
157 void mlx5e_rep_encap_entry_detach(struct mlx5e_priv *priv,
158 struct mlx5e_encap_entry *e);
159
160 void mlx5e_rep_queue_neigh_stats_work(struct mlx5e_priv *priv);
161 #else /* CONFIG_MLX5_ESWITCH */
mlx5e_register_vport_reps(struct mlx5e_priv * priv)162 static inline void mlx5e_register_vport_reps(struct mlx5e_priv *priv) {}
mlx5e_unregister_vport_reps(struct mlx5e_priv * priv)163 static inline void mlx5e_unregister_vport_reps(struct mlx5e_priv *priv) {}
mlx5e_is_uplink_rep(struct mlx5e_priv * priv)164 static inline bool mlx5e_is_uplink_rep(struct mlx5e_priv *priv) { return false; }
mlx5e_add_sqs_fwd_rules(struct mlx5e_priv * priv)165 static inline int mlx5e_add_sqs_fwd_rules(struct mlx5e_priv *priv) { return 0; }
mlx5e_remove_sqs_fwd_rules(struct mlx5e_priv * priv)166 static inline void mlx5e_remove_sqs_fwd_rules(struct mlx5e_priv *priv) {}
167 #endif
168
169 #endif /* __MLX5E_REP_H__ */
170
