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 <linux/mutex.h>
39 #include "eswitch.h"
40 #include "en.h"
41 #include "lib/port_tun.h"
42
43 #ifdef CONFIG_MLX5_ESWITCH
44 struct mlx5e_neigh_update_table {
45 struct rhashtable neigh_ht;
46 /* Save the neigh hash entries in a list in addition to the hash table
47 * (neigh_ht). In order to iterate easily over the neigh entries.
48 * Used for stats query.
49 */
50 struct list_head neigh_list;
51 /* protect lookup/remove operations */
52 struct mutex encap_lock;
53 struct notifier_block netevent_nb;
54 struct delayed_work neigh_stats_work;
55 unsigned long min_interval; /* jiffies */
56 };
57
58 struct mlx5_rep_uplink_priv {
59 /* Filters DB - instantiated by the uplink representor and shared by
60 * the uplink's VFs
61 */
62 struct rhashtable tc_ht;
63
64 /* indirect block callbacks are invoked on bind/unbind events
65 * on registered higher level devices (e.g. tunnel devices)
66 *
67 * tc_indr_block_cb_priv_list is used to lookup indirect callback
68 * private data
69 *
70 * netdevice_nb is the netdev events notifier - used to register
71 * tunnel devices for block events
72 *
73 */
74 struct list_head tc_indr_block_priv_list;
75 struct notifier_block netdevice_nb;
76
77 struct mlx5_tun_entropy tun_entropy;
78
79 /* protects unready_flows */
80 struct mutex unready_flows_lock;
81 struct list_head unready_flows;
82 struct work_struct reoffload_flows_work;
83 };
84
85 struct mlx5e_rep_priv {
86 struct mlx5_eswitch_rep *rep;
87 struct mlx5e_neigh_update_table neigh_update;
88 struct net_device *netdev;
89 struct mlx5_flow_handle *vport_rx_rule;
90 struct list_head vport_sqs_list;
91 struct mlx5_rep_uplink_priv uplink_priv; /* valid for uplink rep */
92 struct rtnl_link_stats64 prev_vf_vport_stats;
93 struct devlink_port dl_port;
94 };
95
96 static inline
97 struct mlx5e_rep_priv *mlx5e_rep_to_rep_priv(struct mlx5_eswitch_rep *rep)
98 {
99 return rep->rep_data[REP_ETH].priv;
100 }
101
102 struct mlx5e_neigh {
103 struct net_device *dev;
104 union {
105 __be32 v4;
106 struct in6_addr v6;
107 } dst_ip;
108 int family;
109 };
110
111 struct mlx5e_neigh_hash_entry {
112 struct rhash_head rhash_node;
113 struct mlx5e_neigh m_neigh;
114 struct mlx5e_priv *priv;
115
116 /* Save the neigh hash entry in a list on the representor in
117 * addition to the hash table. In order to iterate easily over the
118 * neighbour entries. Used for stats query.
119 */
120 struct list_head neigh_list;
121
122 /* protects encap list */
123 spinlock_t encap_list_lock;
124 /* encap list sharing the same neigh */
125 struct list_head encap_list;
126
127 /* valid only when the neigh reference is taken during
128 * neigh_update_work workqueue callback.
129 */
130 struct neighbour *n;
131 struct work_struct neigh_update_work;
132
133 /* neigh hash entry can be deleted only when the refcount is zero.
134 * refcount is needed to avoid neigh hash entry removal by TC, while
135 * it's used by the neigh notification call.
136 */
137 refcount_t refcnt;
138
139 /* Save the last reported time offloaded trafic pass over one of the
140 * neigh hash entry flows. Use it to periodically update the neigh
141 * 'used' value and avoid neigh deleting by the kernel.
142 */
143 unsigned long reported_lastuse;
144
145 struct rcu_head rcu;
146 };
147
148 enum {
149 /* set when the encap entry is successfully offloaded into HW */
150 MLX5_ENCAP_ENTRY_VALID = BIT(0),
151 };
152
153 struct mlx5e_encap_entry {
154 /* attached neigh hash entry */
155 struct mlx5e_neigh_hash_entry *nhe;
156 /* neigh hash entry list of encaps sharing the same neigh */
157 struct list_head encap_list;
158 struct mlx5e_neigh m_neigh;
159 /* a node of the eswitch encap hash table which keeping all the encap
160 * entries
161 */
162 struct hlist_node encap_hlist;
163 struct list_head flows;
164 struct mlx5_pkt_reformat *pkt_reformat;
165 const struct ip_tunnel_info *tun_info;
166 unsigned char h_dest[ETH_ALEN]; /* destination eth addr */
167
168 struct net_device *out_dev;
169 struct net_device *route_dev;
170 struct mlx5e_tc_tunnel *tunnel;
171 int reformat_type;
172 u8 flags;
173 char *encap_header;
174 int encap_size;
175 refcount_t refcnt;
176 struct completion res_ready;
177 int compl_result;
178 struct rcu_head rcu;
179 };
180
181 struct mlx5e_rep_sq {
182 struct mlx5_flow_handle *send_to_vport_rule;
183 struct list_head list;
184 };
185
186 void mlx5e_rep_register_vport_reps(struct mlx5_core_dev *mdev);
187 void mlx5e_rep_unregister_vport_reps(struct mlx5_core_dev *mdev);
188 bool mlx5e_is_uplink_rep(struct mlx5e_priv *priv);
189 int mlx5e_add_sqs_fwd_rules(struct mlx5e_priv *priv);
190 void mlx5e_remove_sqs_fwd_rules(struct mlx5e_priv *priv);
191
192 void mlx5e_handle_rx_cqe_rep(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe);
193
194 int mlx5e_rep_encap_entry_attach(struct mlx5e_priv *priv,
195 struct mlx5e_encap_entry *e);
196 void mlx5e_rep_encap_entry_detach(struct mlx5e_priv *priv,
197 struct mlx5e_encap_entry *e);
198
199 void mlx5e_rep_queue_neigh_stats_work(struct mlx5e_priv *priv);
200
201 bool mlx5e_eswitch_rep(struct net_device *netdev);
202
203 #else /* CONFIG_MLX5_ESWITCH */
204 static inline bool mlx5e_is_uplink_rep(struct mlx5e_priv *priv) { return false; }
205 static inline int mlx5e_add_sqs_fwd_rules(struct mlx5e_priv *priv) { return 0; }
206 static inline void mlx5e_remove_sqs_fwd_rules(struct mlx5e_priv *priv) {}
207 #endif
208
209 static inline bool mlx5e_is_vport_rep(struct mlx5e_priv *priv)
210 {
211 return (MLX5_ESWITCH_MANAGER(priv->mdev) && priv->ppriv);
212 }
213 #endif /* __MLX5E_REP_H__ */