1 /* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
2 /*
3 * Copyright (c) 2018 Mellanox Technologies. All rights reserved.
4 */
5
6 #ifndef _MLX5_ESWITCH_
7 #define _MLX5_ESWITCH_
8
9 #include <linux/mlx5/driver.h>
10 #include <net/devlink.h>
11
12 #define MLX5_ESWITCH_MANAGER(mdev) MLX5_CAP_GEN(mdev, eswitch_manager)
13
14 enum {
15 MLX5_ESWITCH_NONE,
16 MLX5_ESWITCH_LEGACY,
17 MLX5_ESWITCH_OFFLOADS
18 };
19
20 enum {
21 REP_ETH,
22 REP_IB,
23 NUM_REP_TYPES,
24 };
25
26 enum {
27 REP_UNREGISTERED,
28 REP_REGISTERED,
29 REP_LOADED,
30 };
31
32 enum mlx5_switchdev_event {
33 MLX5_SWITCHDEV_EVENT_PAIR,
34 MLX5_SWITCHDEV_EVENT_UNPAIR,
35 };
36
37 struct mlx5_eswitch_rep;
38 struct mlx5_eswitch_rep_ops {
39 int (*load)(struct mlx5_core_dev *dev, struct mlx5_eswitch_rep *rep);
40 void (*unload)(struct mlx5_eswitch_rep *rep);
41 void *(*get_proto_dev)(struct mlx5_eswitch_rep *rep);
42 int (*event)(struct mlx5_eswitch *esw,
43 struct mlx5_eswitch_rep *rep,
44 enum mlx5_switchdev_event event,
45 void *data);
46 };
47
48 struct mlx5_eswitch_rep_data {
49 void *priv;
50 atomic_t state;
51 };
52
53 struct mlx5_eswitch_rep {
54 struct mlx5_eswitch_rep_data rep_data[NUM_REP_TYPES];
55 u16 vport;
56 u16 vlan;
57 /* Only IB rep is using vport_index */
58 u16 vport_index;
59 u32 vlan_refcount;
60 struct mlx5_eswitch *esw;
61 };
62
63 void mlx5_eswitch_register_vport_reps(struct mlx5_eswitch *esw,
64 const struct mlx5_eswitch_rep_ops *ops,
65 u8 rep_type);
66 void mlx5_eswitch_unregister_vport_reps(struct mlx5_eswitch *esw, u8 rep_type);
67 void *mlx5_eswitch_get_proto_dev(struct mlx5_eswitch *esw,
68 u16 vport_num,
69 u8 rep_type);
70 struct mlx5_eswitch_rep *mlx5_eswitch_vport_rep(struct mlx5_eswitch *esw,
71 u16 vport_num);
72 void *mlx5_eswitch_uplink_get_proto_dev(struct mlx5_eswitch *esw, u8 rep_type);
73 struct mlx5_flow_handle *
74 mlx5_eswitch_add_send_to_vport_rule(struct mlx5_eswitch *on_esw,
75 struct mlx5_eswitch *from_esw,
76 struct mlx5_eswitch_rep *rep, u32 sqn);
77
78 #ifdef CONFIG_MLX5_ESWITCH
79 enum devlink_eswitch_encap_mode
80 mlx5_eswitch_get_encap_mode(const struct mlx5_core_dev *dev);
81
82 bool mlx5_eswitch_reg_c1_loopback_enabled(const struct mlx5_eswitch *esw);
83 bool mlx5_eswitch_vport_match_metadata_enabled(const struct mlx5_eswitch *esw);
84
85 /* Reg C0 usage:
86 * Reg C0 = < ESW_PFNUM_BITS(4) | ESW_VPORT BITS(12) | ESW_REG_C0_OBJ(16) >
87 *
88 * Highest 4 bits of the reg c0 is the PF_NUM (range 0-15), 12 bits of
89 * unique non-zero vport id (range 1-4095). The rest (lowest 16 bits) is left
90 * for user data objects managed by a common mapping context.
91 * PFNUM + VPORT comprise the SOURCE_PORT matching.
92 */
93 #define ESW_VPORT_BITS 12
94 #define ESW_PFNUM_BITS 4
95 #define ESW_SOURCE_PORT_METADATA_BITS (ESW_PFNUM_BITS + ESW_VPORT_BITS)
96 #define ESW_SOURCE_PORT_METADATA_OFFSET (32 - ESW_SOURCE_PORT_METADATA_BITS)
97 #define ESW_REG_C0_USER_DATA_METADATA_BITS (32 - ESW_SOURCE_PORT_METADATA_BITS)
98 #define ESW_REG_C0_USER_DATA_METADATA_MASK GENMASK(ESW_REG_C0_USER_DATA_METADATA_BITS - 1, 0)
99
mlx5_eswitch_get_vport_metadata_mask(void)100 static inline u32 mlx5_eswitch_get_vport_metadata_mask(void)
101 {
102 return GENMASK(31, 32 - ESW_SOURCE_PORT_METADATA_BITS);
103 }
104
105 u32 mlx5_eswitch_get_vport_metadata_for_match(struct mlx5_eswitch *esw,
106 u16 vport_num);
107 u32 mlx5_eswitch_get_vport_metadata_for_set(struct mlx5_eswitch *esw,
108 u16 vport_num);
109
110 /* Reg C1 usage:
111 * Reg C1 = < Reserved(1) | ESW_TUN_ID(12) | ESW_TUN_OPTS(11) | ESW_ZONE_ID(8) >
112 *
113 * Highest bit is reserved for other offloads as marker bit, next 12 bits of reg c1
114 * is the encapsulation tunnel id, next 11 bits is encapsulation tunnel options,
115 * and the lowest 8 bits are used for zone id.
116 *
117 * Zone id is used to restore CT flow when packet misses on chain.
118 *
119 * Tunnel id and options are used together to restore the tunnel info metadata
120 * on miss and to support inner header rewrite by means of implicit chain 0
121 * flows.
122 */
123 #define ESW_RESERVED_BITS 1
124 #define ESW_ZONE_ID_BITS 8
125 #define ESW_TUN_OPTS_BITS 11
126 #define ESW_TUN_ID_BITS 12
127 #define ESW_TUN_OPTS_OFFSET ESW_ZONE_ID_BITS
128 #define ESW_TUN_OFFSET ESW_TUN_OPTS_OFFSET
129 #define ESW_ZONE_ID_MASK GENMASK(ESW_ZONE_ID_BITS - 1, 0)
130 #define ESW_TUN_OPTS_MASK GENMASK(31 - ESW_TUN_ID_BITS - ESW_RESERVED_BITS, ESW_TUN_OPTS_OFFSET)
131 #define ESW_TUN_MASK GENMASK(31 - ESW_RESERVED_BITS, ESW_TUN_OFFSET)
132 #define ESW_TUN_ID_SLOW_TABLE_GOTO_VPORT 0 /* 0 is not a valid tunnel id */
133 /* 0x7FF is a reserved mapping */
134 #define ESW_TUN_OPTS_SLOW_TABLE_GOTO_VPORT GENMASK(ESW_TUN_OPTS_BITS - 1, 0)
135 #define ESW_TUN_SLOW_TABLE_GOTO_VPORT ((ESW_TUN_ID_SLOW_TABLE_GOTO_VPORT << ESW_TUN_OPTS_BITS) | \
136 ESW_TUN_OPTS_SLOW_TABLE_GOTO_VPORT)
137 #define ESW_TUN_SLOW_TABLE_GOTO_VPORT_MARK ESW_TUN_OPTS_MASK
138
139 u8 mlx5_eswitch_mode(struct mlx5_core_dev *dev);
140 u16 mlx5_eswitch_get_total_vports(const struct mlx5_core_dev *dev);
141 struct mlx5_core_dev *mlx5_eswitch_get_core_dev(struct mlx5_eswitch *esw);
142
143 #else /* CONFIG_MLX5_ESWITCH */
144
mlx5_eswitch_mode(struct mlx5_core_dev * dev)145 static inline u8 mlx5_eswitch_mode(struct mlx5_core_dev *dev)
146 {
147 return MLX5_ESWITCH_NONE;
148 }
149
150 static inline enum devlink_eswitch_encap_mode
mlx5_eswitch_get_encap_mode(const struct mlx5_core_dev * dev)151 mlx5_eswitch_get_encap_mode(const struct mlx5_core_dev *dev)
152 {
153 return DEVLINK_ESWITCH_ENCAP_MODE_NONE;
154 }
155
156 static inline bool
mlx5_eswitch_reg_c1_loopback_enabled(const struct mlx5_eswitch * esw)157 mlx5_eswitch_reg_c1_loopback_enabled(const struct mlx5_eswitch *esw)
158 {
159 return false;
160 };
161
162 static inline bool
mlx5_eswitch_vport_match_metadata_enabled(const struct mlx5_eswitch * esw)163 mlx5_eswitch_vport_match_metadata_enabled(const struct mlx5_eswitch *esw)
164 {
165 return false;
166 };
167
168 static inline u32
mlx5_eswitch_get_vport_metadata_for_match(struct mlx5_eswitch * esw,u16 vport_num)169 mlx5_eswitch_get_vport_metadata_for_match(struct mlx5_eswitch *esw, u16 vport_num)
170 {
171 return 0;
172 };
173
174 static inline u32
mlx5_eswitch_get_vport_metadata_mask(void)175 mlx5_eswitch_get_vport_metadata_mask(void)
176 {
177 return 0;
178 }
179
mlx5_eswitch_get_total_vports(const struct mlx5_core_dev * dev)180 static inline u16 mlx5_eswitch_get_total_vports(const struct mlx5_core_dev *dev)
181 {
182 return 0;
183 }
184
mlx5_eswitch_get_core_dev(struct mlx5_eswitch * esw)185 static inline struct mlx5_core_dev *mlx5_eswitch_get_core_dev(struct mlx5_eswitch *esw)
186 {
187 return NULL;
188 }
189
190 #endif /* CONFIG_MLX5_ESWITCH */
191
is_mdev_switchdev_mode(struct mlx5_core_dev * dev)192 static inline bool is_mdev_switchdev_mode(struct mlx5_core_dev *dev)
193 {
194 return mlx5_eswitch_mode(dev) == MLX5_ESWITCH_OFFLOADS;
195 }
196
197 #endif
198
