1 /* 2 * include/net/devlink.h - Network physical device Netlink interface 3 * Copyright (c) 2016 Mellanox Technologies. All rights reserved. 4 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 */ 11 #ifndef _NET_DEVLINK_H_ 12 #define _NET_DEVLINK_H_ 13 14 #include <linux/device.h> 15 #include <linux/slab.h> 16 #include <linux/gfp.h> 17 #include <linux/list.h> 18 #include <linux/netdevice.h> 19 #include <net/net_namespace.h> 20 #include <uapi/linux/devlink.h> 21 22 struct devlink_ops; 23 24 struct devlink { 25 struct list_head list; 26 struct list_head port_list; 27 struct list_head sb_list; 28 const struct devlink_ops *ops; 29 struct device *dev; 30 possible_net_t _net; 31 char priv[0] __aligned(NETDEV_ALIGN); 32 }; 33 34 struct devlink_port { 35 struct list_head list; 36 struct devlink *devlink; 37 unsigned index; 38 bool registered; 39 enum devlink_port_type type; 40 enum devlink_port_type desired_type; 41 void *type_dev; 42 bool split; 43 u32 split_group; 44 }; 45 46 struct devlink_sb_pool_info { 47 enum devlink_sb_pool_type pool_type; 48 u32 size; 49 enum devlink_sb_threshold_type threshold_type; 50 }; 51 52 struct devlink_ops { 53 size_t priv_size; 54 int (*port_type_set)(struct devlink_port *devlink_port, 55 enum devlink_port_type port_type); 56 int (*port_split)(struct devlink *devlink, unsigned int port_index, 57 unsigned int count); 58 int (*port_unsplit)(struct devlink *devlink, unsigned int port_index); 59 int (*sb_pool_get)(struct devlink *devlink, unsigned int sb_index, 60 u16 pool_index, 61 struct devlink_sb_pool_info *pool_info); 62 int (*sb_pool_set)(struct devlink *devlink, unsigned int sb_index, 63 u16 pool_index, u32 size, 64 enum devlink_sb_threshold_type threshold_type); 65 int (*sb_port_pool_get)(struct devlink_port *devlink_port, 66 unsigned int sb_index, u16 pool_index, 67 u32 *p_threshold); 68 int (*sb_port_pool_set)(struct devlink_port *devlink_port, 69 unsigned int sb_index, u16 pool_index, 70 u32 threshold); 71 int (*sb_tc_pool_bind_get)(struct devlink_port *devlink_port, 72 unsigned int sb_index, 73 u16 tc_index, 74 enum devlink_sb_pool_type pool_type, 75 u16 *p_pool_index, u32 *p_threshold); 76 int (*sb_tc_pool_bind_set)(struct devlink_port *devlink_port, 77 unsigned int sb_index, 78 u16 tc_index, 79 enum devlink_sb_pool_type pool_type, 80 u16 pool_index, u32 threshold); 81 int (*sb_occ_snapshot)(struct devlink *devlink, 82 unsigned int sb_index); 83 int (*sb_occ_max_clear)(struct devlink *devlink, 84 unsigned int sb_index); 85 int (*sb_occ_port_pool_get)(struct devlink_port *devlink_port, 86 unsigned int sb_index, u16 pool_index, 87 u32 *p_cur, u32 *p_max); 88 int (*sb_occ_tc_port_bind_get)(struct devlink_port *devlink_port, 89 unsigned int sb_index, 90 u16 tc_index, 91 enum devlink_sb_pool_type pool_type, 92 u32 *p_cur, u32 *p_max); 93 }; 94 95 static inline void *devlink_priv(struct devlink *devlink) 96 { 97 BUG_ON(!devlink); 98 return &devlink->priv; 99 } 100 101 static inline struct devlink *priv_to_devlink(void *priv) 102 { 103 BUG_ON(!priv); 104 return container_of(priv, struct devlink, priv); 105 } 106 107 struct ib_device; 108 109 #if IS_ENABLED(CONFIG_NET_DEVLINK) 110 111 struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size); 112 int devlink_register(struct devlink *devlink, struct device *dev); 113 void devlink_unregister(struct devlink *devlink); 114 void devlink_free(struct devlink *devlink); 115 int devlink_port_register(struct devlink *devlink, 116 struct devlink_port *devlink_port, 117 unsigned int port_index); 118 void devlink_port_unregister(struct devlink_port *devlink_port); 119 void devlink_port_type_eth_set(struct devlink_port *devlink_port, 120 struct net_device *netdev); 121 void devlink_port_type_ib_set(struct devlink_port *devlink_port, 122 struct ib_device *ibdev); 123 void devlink_port_type_clear(struct devlink_port *devlink_port); 124 void devlink_port_split_set(struct devlink_port *devlink_port, 125 u32 split_group); 126 int devlink_sb_register(struct devlink *devlink, unsigned int sb_index, 127 u32 size, u16 ingress_pools_count, 128 u16 egress_pools_count, u16 ingress_tc_count, 129 u16 egress_tc_count); 130 void devlink_sb_unregister(struct devlink *devlink, unsigned int sb_index); 131 132 #else 133 134 static inline struct devlink *devlink_alloc(const struct devlink_ops *ops, 135 size_t priv_size) 136 { 137 return kzalloc(sizeof(struct devlink) + priv_size, GFP_KERNEL); 138 } 139 140 static inline int devlink_register(struct devlink *devlink, struct device *dev) 141 { 142 return 0; 143 } 144 145 static inline void devlink_unregister(struct devlink *devlink) 146 { 147 } 148 149 static inline void devlink_free(struct devlink *devlink) 150 { 151 kfree(devlink); 152 } 153 154 static inline int devlink_port_register(struct devlink *devlink, 155 struct devlink_port *devlink_port, 156 unsigned int port_index) 157 { 158 return 0; 159 } 160 161 static inline void devlink_port_unregister(struct devlink_port *devlink_port) 162 { 163 } 164 165 static inline void devlink_port_type_eth_set(struct devlink_port *devlink_port, 166 struct net_device *netdev) 167 { 168 } 169 170 static inline void devlink_port_type_ib_set(struct devlink_port *devlink_port, 171 struct ib_device *ibdev) 172 { 173 } 174 175 static inline void devlink_port_type_clear(struct devlink_port *devlink_port) 176 { 177 } 178 179 static inline void devlink_port_split_set(struct devlink_port *devlink_port, 180 u32 split_group) 181 { 182 } 183 184 static inline int devlink_sb_register(struct devlink *devlink, 185 unsigned int sb_index, u32 size, 186 u16 ingress_pools_count, 187 u16 egress_pools_count, 188 u16 ingress_tc_count, 189 u16 egress_tc_count) 190 { 191 return 0; 192 } 193 194 static inline void devlink_sb_unregister(struct devlink *devlink, 195 unsigned int sb_index) 196 { 197 } 198 199 #endif 200 201 #endif /* _NET_DEVLINK_H_ */ 202