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_LEGACY,
16 	MLX5_ESWITCH_OFFLOADS
17 };
18 
19 enum {
20 	REP_ETH,
21 	REP_IB,
22 	NUM_REP_TYPES,
23 };
24 
25 enum {
26 	REP_UNREGISTERED,
27 	REP_REGISTERED,
28 	REP_LOADED,
29 };
30 
31 enum mlx5_switchdev_event {
32 	MLX5_SWITCHDEV_EVENT_PAIR,
33 	MLX5_SWITCHDEV_EVENT_UNPAIR,
34 };
35 
36 struct mlx5_eswitch_rep;
37 struct mlx5_eswitch_rep_ops {
38 	int (*load)(struct mlx5_core_dev *dev, struct mlx5_eswitch_rep *rep);
39 	void (*unload)(struct mlx5_eswitch_rep *rep);
40 	void *(*get_proto_dev)(struct mlx5_eswitch_rep *rep);
41 	int (*event)(struct mlx5_eswitch *esw,
42 		     struct mlx5_eswitch_rep *rep,
43 		     enum mlx5_switchdev_event event,
44 		     void *data);
45 };
46 
47 struct mlx5_eswitch_rep_data {
48 	void *priv;
49 	atomic_t state;
50 };
51 
52 struct mlx5_eswitch_rep {
53 	struct mlx5_eswitch_rep_data rep_data[NUM_REP_TYPES];
54 	u16		       vport;
55 	u16		       vlan;
56 	/* Only IB rep is using vport_index */
57 	u16		       vport_index;
58 	u32		       vlan_refcount;
59 	struct                 mlx5_eswitch *esw;
60 };
61 
62 void mlx5_eswitch_register_vport_reps(struct mlx5_eswitch *esw,
63 				      const struct mlx5_eswitch_rep_ops *ops,
64 				      u8 rep_type);
65 void mlx5_eswitch_unregister_vport_reps(struct mlx5_eswitch *esw, u8 rep_type);
66 void *mlx5_eswitch_get_proto_dev(struct mlx5_eswitch *esw,
67 				 u16 vport_num,
68 				 u8 rep_type);
69 struct mlx5_eswitch_rep *mlx5_eswitch_vport_rep(struct mlx5_eswitch *esw,
70 						u16 vport_num);
71 void *mlx5_eswitch_uplink_get_proto_dev(struct mlx5_eswitch *esw, u8 rep_type);
72 struct mlx5_flow_handle *
73 mlx5_eswitch_add_send_to_vport_rule(struct mlx5_eswitch *on_esw,
74 				    struct mlx5_eswitch *from_esw,
75 				    struct mlx5_eswitch_rep *rep, u32 sqn);
76 
77 #ifdef CONFIG_MLX5_ESWITCH
78 enum devlink_eswitch_encap_mode
79 mlx5_eswitch_get_encap_mode(const struct mlx5_core_dev *dev);
80 
81 bool mlx5_eswitch_reg_c1_loopback_enabled(const struct mlx5_eswitch *esw);
82 bool mlx5_eswitch_vport_match_metadata_enabled(const struct mlx5_eswitch *esw);
83 
84 /* Reg C0 usage:
85  * Reg C0 = < ESW_PFNUM_BITS(4) | ESW_VPORT BITS(12) | ESW_REG_C0_OBJ(16) >
86  *
87  * Highest 4 bits of the reg c0 is the PF_NUM (range 0-15), 12 bits of
88  * unique non-zero vport id (range 1-4095). The rest (lowest 16 bits) is left
89  * for user data objects managed by a common mapping context.
90  * PFNUM + VPORT comprise the SOURCE_PORT matching.
91  */
92 #define ESW_VPORT_BITS 12
93 #define ESW_PFNUM_BITS 4
94 #define ESW_SOURCE_PORT_METADATA_BITS (ESW_PFNUM_BITS + ESW_VPORT_BITS)
95 #define ESW_SOURCE_PORT_METADATA_OFFSET (32 - ESW_SOURCE_PORT_METADATA_BITS)
96 #define ESW_REG_C0_USER_DATA_METADATA_BITS (32 - ESW_SOURCE_PORT_METADATA_BITS)
97 #define ESW_REG_C0_USER_DATA_METADATA_MASK GENMASK(ESW_REG_C0_USER_DATA_METADATA_BITS - 1, 0)
98 
mlx5_eswitch_get_vport_metadata_mask(void)99 static inline u32 mlx5_eswitch_get_vport_metadata_mask(void)
100 {
101 	return GENMASK(31, 32 - ESW_SOURCE_PORT_METADATA_BITS);
102 }
103 
104 u32 mlx5_eswitch_get_vport_metadata_for_match(struct mlx5_eswitch *esw,
105 					      u16 vport_num);
106 u32 mlx5_eswitch_get_vport_metadata_for_set(struct mlx5_eswitch *esw,
107 					    u16 vport_num);
108 
109 /* Reg C1 usage:
110  * Reg C1 = < Reserved(1) | ESW_TUN_ID(12) | ESW_TUN_OPTS(11) | ESW_ZONE_ID(8) >
111  *
112  * Highest bit is reserved for other offloads as marker bit, next 12 bits of reg c1
113  * is the encapsulation tunnel id, next 11 bits is encapsulation tunnel options,
114  * and the lowest 8 bits are used for zone id.
115  *
116  * Zone id is used to restore CT flow when packet misses on chain.
117  *
118  * Tunnel id and options are used together to restore the tunnel info metadata
119  * on miss and to support inner header rewrite by means of implicit chain 0
120  * flows.
121  */
122 #define ESW_RESERVED_BITS 1
123 #define ESW_ZONE_ID_BITS 8
124 #define ESW_TUN_OPTS_BITS 11
125 #define ESW_TUN_ID_BITS 12
126 #define ESW_TUN_OPTS_OFFSET ESW_ZONE_ID_BITS
127 #define ESW_TUN_OFFSET ESW_TUN_OPTS_OFFSET
128 #define ESW_ZONE_ID_MASK GENMASK(ESW_ZONE_ID_BITS - 1, 0)
129 #define ESW_TUN_OPTS_MASK GENMASK(31 - ESW_TUN_ID_BITS - ESW_RESERVED_BITS, ESW_TUN_OPTS_OFFSET)
130 #define ESW_TUN_MASK GENMASK(31 - ESW_RESERVED_BITS, ESW_TUN_OFFSET)
131 #define ESW_TUN_ID_SLOW_TABLE_GOTO_VPORT 0 /* 0 is not a valid tunnel id */
132 #define ESW_TUN_ID_BRIDGE_INGRESS_PUSH_VLAN ESW_TUN_ID_SLOW_TABLE_GOTO_VPORT
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 /* 0x7FE is a reserved mapping for bridge ingress push vlan mark */
139 #define ESW_TUN_OPTS_BRIDGE_INGRESS_PUSH_VLAN (ESW_TUN_OPTS_SLOW_TABLE_GOTO_VPORT - 1)
140 #define ESW_TUN_BRIDGE_INGRESS_PUSH_VLAN ((ESW_TUN_ID_BRIDGE_INGRESS_PUSH_VLAN << \
141 					   ESW_TUN_OPTS_BITS) | \
142 					  ESW_TUN_OPTS_BRIDGE_INGRESS_PUSH_VLAN)
143 #define ESW_TUN_BRIDGE_INGRESS_PUSH_VLAN_MARK \
144 	GENMASK(31 - ESW_TUN_ID_BITS - ESW_RESERVED_BITS, \
145 		ESW_TUN_OPTS_OFFSET + 1)
146 
147 u8 mlx5_eswitch_mode(const struct mlx5_core_dev *dev);
148 u16 mlx5_eswitch_get_total_vports(const struct mlx5_core_dev *dev);
149 struct mlx5_core_dev *mlx5_eswitch_get_core_dev(struct mlx5_eswitch *esw);
150 
151 #else  /* CONFIG_MLX5_ESWITCH */
152 
mlx5_eswitch_mode(const struct mlx5_core_dev * dev)153 static inline u8 mlx5_eswitch_mode(const struct mlx5_core_dev *dev)
154 {
155 	return MLX5_ESWITCH_LEGACY;
156 }
157 
158 static inline enum devlink_eswitch_encap_mode
mlx5_eswitch_get_encap_mode(const struct mlx5_core_dev * dev)159 mlx5_eswitch_get_encap_mode(const struct mlx5_core_dev *dev)
160 {
161 	return DEVLINK_ESWITCH_ENCAP_MODE_NONE;
162 }
163 
164 static inline bool
mlx5_eswitch_reg_c1_loopback_enabled(const struct mlx5_eswitch * esw)165 mlx5_eswitch_reg_c1_loopback_enabled(const struct mlx5_eswitch *esw)
166 {
167 	return false;
168 };
169 
170 static inline bool
mlx5_eswitch_vport_match_metadata_enabled(const struct mlx5_eswitch * esw)171 mlx5_eswitch_vport_match_metadata_enabled(const struct mlx5_eswitch *esw)
172 {
173 	return false;
174 };
175 
176 static inline u32
mlx5_eswitch_get_vport_metadata_for_match(struct mlx5_eswitch * esw,u16 vport_num)177 mlx5_eswitch_get_vport_metadata_for_match(struct mlx5_eswitch *esw, u16 vport_num)
178 {
179 	return 0;
180 };
181 
182 static inline u32
mlx5_eswitch_get_vport_metadata_mask(void)183 mlx5_eswitch_get_vport_metadata_mask(void)
184 {
185 	return 0;
186 }
187 
mlx5_eswitch_get_total_vports(const struct mlx5_core_dev * dev)188 static inline u16 mlx5_eswitch_get_total_vports(const struct mlx5_core_dev *dev)
189 {
190 	return 0;
191 }
192 
mlx5_eswitch_get_core_dev(struct mlx5_eswitch * esw)193 static inline struct mlx5_core_dev *mlx5_eswitch_get_core_dev(struct mlx5_eswitch *esw)
194 {
195 	return NULL;
196 }
197 
198 #endif /* CONFIG_MLX5_ESWITCH */
199 
is_mdev_legacy_mode(struct mlx5_core_dev * dev)200 static inline bool is_mdev_legacy_mode(struct mlx5_core_dev *dev)
201 {
202 	return mlx5_eswitch_mode(dev) == MLX5_ESWITCH_LEGACY;
203 }
204 
is_mdev_switchdev_mode(struct mlx5_core_dev * dev)205 static inline bool is_mdev_switchdev_mode(struct mlx5_core_dev *dev)
206 {
207 	return mlx5_eswitch_mode(dev) == MLX5_ESWITCH_OFFLOADS;
208 }
209 
210 #endif
211