1 /* 2 * Copyright (C) 2017 Netronome Systems, Inc. 3 * 4 * This software is licensed under the GNU General License Version 2, 5 * June 1991 as shown in the file COPYING in the top-level directory of this 6 * source tree. 7 * 8 * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" 9 * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, 10 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 11 * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE 12 * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME 13 * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 14 */ 15 16 #include <linux/debugfs.h> 17 #include <linux/device.h> 18 #include <linux/ethtool.h> 19 #include <linux/kernel.h> 20 #include <linux/list.h> 21 #include <linux/netdevice.h> 22 #include <linux/ptp_mock.h> 23 #include <linux/u64_stats_sync.h> 24 #include <net/devlink.h> 25 #include <net/udp_tunnel.h> 26 #include <net/xdp.h> 27 #include <net/macsec.h> 28 29 #define DRV_NAME "netdevsim" 30 31 #define NSIM_XDP_MAX_MTU 4000 32 33 #define NSIM_EA(extack, msg) NL_SET_ERR_MSG_MOD((extack), msg) 34 35 #define NSIM_IPSEC_MAX_SA_COUNT 33 36 #define NSIM_IPSEC_VALID BIT(31) 37 #define NSIM_UDP_TUNNEL_N_PORTS 4 38 39 struct nsim_sa { 40 struct xfrm_state *xs; 41 __be32 ipaddr[4]; 42 u32 key[4]; 43 u32 salt; 44 bool used; 45 bool crypt; 46 bool rx; 47 }; 48 49 struct nsim_ipsec { 50 struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT]; 51 struct dentry *pfile; 52 u32 count; 53 u32 tx; 54 u32 ok; 55 }; 56 57 #define NSIM_MACSEC_MAX_SECY_COUNT 3 58 #define NSIM_MACSEC_MAX_RXSC_COUNT 1 59 struct nsim_rxsc { 60 sci_t sci; 61 bool used; 62 }; 63 64 struct nsim_secy { 65 sci_t sci; 66 struct nsim_rxsc nsim_rxsc[NSIM_MACSEC_MAX_RXSC_COUNT]; 67 u8 nsim_rxsc_count; 68 bool used; 69 }; 70 71 struct nsim_macsec { 72 struct nsim_secy nsim_secy[NSIM_MACSEC_MAX_SECY_COUNT]; 73 u8 nsim_secy_count; 74 }; 75 76 struct nsim_ethtool_pauseparam { 77 bool rx; 78 bool tx; 79 bool report_stats_rx; 80 bool report_stats_tx; 81 }; 82 83 struct nsim_ethtool { 84 u32 get_err; 85 u32 set_err; 86 u32 channels; 87 struct nsim_ethtool_pauseparam pauseparam; 88 struct ethtool_coalesce coalesce; 89 struct ethtool_ringparam ring; 90 struct ethtool_fecparam fec; 91 }; 92 93 struct netdevsim { 94 struct net_device *netdev; 95 struct nsim_dev *nsim_dev; 96 struct nsim_dev_port *nsim_dev_port; 97 struct mock_phc *phc; 98 99 u64 tx_packets; 100 u64 tx_bytes; 101 u64 tx_dropped; 102 struct u64_stats_sync syncp; 103 104 struct nsim_bus_dev *nsim_bus_dev; 105 106 struct bpf_prog *bpf_offloaded; 107 u32 bpf_offloaded_id; 108 109 struct xdp_attachment_info xdp; 110 struct xdp_attachment_info xdp_hw; 111 112 bool bpf_tc_accept; 113 bool bpf_tc_non_bound_accept; 114 bool bpf_xdpdrv_accept; 115 bool bpf_xdpoffload_accept; 116 117 bool bpf_map_accept; 118 struct nsim_ipsec ipsec; 119 struct nsim_macsec macsec; 120 struct { 121 u32 inject_error; 122 u32 sleep; 123 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS]; 124 u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS]; 125 struct debugfs_u32_array dfs_ports[2]; 126 } udp_ports; 127 128 struct nsim_ethtool ethtool; 129 struct netdevsim __rcu *peer; 130 }; 131 132 struct netdevsim * 133 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port); 134 void nsim_destroy(struct netdevsim *ns); 135 bool netdev_is_nsim(struct net_device *dev); 136 137 void nsim_ethtool_init(struct netdevsim *ns); 138 139 void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev); 140 int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev, 141 struct net_device *dev); 142 void nsim_udp_tunnels_info_destroy(struct net_device *dev); 143 144 #ifdef CONFIG_BPF_SYSCALL 145 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev); 146 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev); 147 int nsim_bpf_init(struct netdevsim *ns); 148 void nsim_bpf_uninit(struct netdevsim *ns); 149 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf); 150 int nsim_bpf_disable_tc(struct netdevsim *ns); 151 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, 152 void *type_data, void *cb_priv); 153 #else 154 155 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev) 156 { 157 return 0; 158 } 159 160 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev) 161 { 162 } 163 static inline int nsim_bpf_init(struct netdevsim *ns) 164 { 165 return 0; 166 } 167 168 static inline void nsim_bpf_uninit(struct netdevsim *ns) 169 { 170 } 171 172 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf) 173 { 174 return -EOPNOTSUPP; 175 } 176 177 static inline int nsim_bpf_disable_tc(struct netdevsim *ns) 178 { 179 return 0; 180 } 181 182 static inline int 183 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 184 void *cb_priv) 185 { 186 return -EOPNOTSUPP; 187 } 188 #endif 189 190 enum nsim_resource_id { 191 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */ 192 NSIM_RESOURCE_IPV4, 193 NSIM_RESOURCE_IPV4_FIB, 194 NSIM_RESOURCE_IPV4_FIB_RULES, 195 NSIM_RESOURCE_IPV6, 196 NSIM_RESOURCE_IPV6_FIB, 197 NSIM_RESOURCE_IPV6_FIB_RULES, 198 NSIM_RESOURCE_NEXTHOPS, 199 }; 200 201 struct nsim_dev_health { 202 struct devlink_health_reporter *empty_reporter; 203 struct devlink_health_reporter *dummy_reporter; 204 struct dentry *ddir; 205 char *recovered_break_msg; 206 u32 binary_len; 207 bool fail_recover; 208 }; 209 210 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink); 211 void nsim_dev_health_exit(struct nsim_dev *nsim_dev); 212 213 struct nsim_dev_hwstats_netdev { 214 struct list_head list; 215 struct net_device *netdev; 216 struct rtnl_hw_stats64 stats; 217 bool enabled; 218 bool fail_enable; 219 }; 220 221 struct nsim_dev_hwstats { 222 struct dentry *ddir; 223 struct dentry *l3_ddir; 224 225 struct mutex hwsdev_list_lock; /* protects hwsdev list(s) */ 226 struct list_head l3_list; 227 228 struct notifier_block netdevice_nb; 229 struct delayed_work traffic_dw; 230 }; 231 232 int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev); 233 void nsim_dev_hwstats_exit(struct nsim_dev *nsim_dev); 234 235 #if IS_ENABLED(CONFIG_PSAMPLE) 236 int nsim_dev_psample_init(struct nsim_dev *nsim_dev); 237 void nsim_dev_psample_exit(struct nsim_dev *nsim_dev); 238 #else 239 static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev) 240 { 241 return 0; 242 } 243 244 static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev) 245 { 246 } 247 #endif 248 249 enum nsim_dev_port_type { 250 NSIM_DEV_PORT_TYPE_PF, 251 NSIM_DEV_PORT_TYPE_VF, 252 }; 253 254 #define NSIM_DEV_VF_PORT_INDEX_BASE 128 255 #define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX 256 257 struct nsim_dev_port { 258 struct list_head list; 259 struct devlink_port devlink_port; 260 unsigned int port_index; 261 enum nsim_dev_port_type port_type; 262 struct dentry *ddir; 263 struct dentry *rate_parent; 264 char *parent_name; 265 struct netdevsim *ns; 266 }; 267 268 struct nsim_vf_config { 269 int link_state; 270 u16 min_tx_rate; 271 u16 max_tx_rate; 272 u16 vlan; 273 __be16 vlan_proto; 274 u16 qos; 275 u8 vf_mac[ETH_ALEN]; 276 bool spoofchk_enabled; 277 bool trusted; 278 bool rss_query_enabled; 279 }; 280 281 struct nsim_dev { 282 struct nsim_bus_dev *nsim_bus_dev; 283 struct nsim_fib_data *fib_data; 284 struct nsim_trap_data *trap_data; 285 struct dentry *ddir; 286 struct dentry *ports_ddir; 287 struct dentry *take_snapshot; 288 struct dentry *nodes_ddir; 289 290 struct nsim_vf_config *vfconfigs; 291 292 struct bpf_offload_dev *bpf_dev; 293 bool bpf_bind_accept; 294 bool bpf_bind_verifier_accept; 295 u32 bpf_bind_verifier_delay; 296 struct dentry *ddir_bpf_bound_progs; 297 u32 prog_id_gen; 298 struct list_head bpf_bound_progs; 299 struct list_head bpf_bound_maps; 300 struct netdev_phys_item_id switch_id; 301 struct list_head port_list; 302 bool fw_update_status; 303 u32 fw_update_overwrite_mask; 304 u32 max_macs; 305 bool test1; 306 bool dont_allow_reload; 307 bool fail_reload; 308 struct devlink_region *dummy_region; 309 struct nsim_dev_health health; 310 struct nsim_dev_hwstats hwstats; 311 struct flow_action_cookie *fa_cookie; 312 spinlock_t fa_cookie_lock; /* protects fa_cookie */ 313 bool fail_trap_group_set; 314 bool fail_trap_policer_set; 315 bool fail_trap_policer_counter_get; 316 bool fail_trap_drop_counter_get; 317 struct { 318 struct udp_tunnel_nic_shared utn_shared; 319 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS]; 320 bool sync_all; 321 bool open_only; 322 bool ipv4_only; 323 bool shared; 324 bool static_iana_vxlan; 325 u32 sleep; 326 } udp_ports; 327 struct nsim_dev_psample *psample; 328 u16 esw_mode; 329 }; 330 331 static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev) 332 { 333 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY; 334 } 335 336 static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev) 337 { 338 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV; 339 } 340 341 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev) 342 { 343 return devlink_net(priv_to_devlink(nsim_dev)); 344 } 345 346 int nsim_dev_init(void); 347 void nsim_dev_exit(void); 348 int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev); 349 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev); 350 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, 351 enum nsim_dev_port_type type, 352 unsigned int port_index); 353 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, 354 enum nsim_dev_port_type type, 355 unsigned int port_index); 356 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev, 357 unsigned int num_vfs); 358 359 unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev); 360 361 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink, 362 struct netlink_ext_ack *extack); 363 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data); 364 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data, 365 enum nsim_resource_id res_id, bool max); 366 367 static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port) 368 { 369 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF; 370 } 371 372 static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port) 373 { 374 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF; 375 } 376 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD) 377 void nsim_ipsec_init(struct netdevsim *ns); 378 void nsim_ipsec_teardown(struct netdevsim *ns); 379 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb); 380 #else 381 static inline void nsim_ipsec_init(struct netdevsim *ns) 382 { 383 } 384 385 static inline void nsim_ipsec_teardown(struct netdevsim *ns) 386 { 387 } 388 389 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb) 390 { 391 return true; 392 } 393 #endif 394 395 #if IS_ENABLED(CONFIG_MACSEC) 396 void nsim_macsec_init(struct netdevsim *ns); 397 void nsim_macsec_teardown(struct netdevsim *ns); 398 #else 399 static inline void nsim_macsec_init(struct netdevsim *ns) 400 { 401 } 402 403 static inline void nsim_macsec_teardown(struct netdevsim *ns) 404 { 405 } 406 #endif 407 408 struct nsim_bus_dev { 409 struct device dev; 410 struct list_head list; 411 unsigned int port_count; 412 unsigned int num_queues; /* Number of queues for each port on this bus */ 413 struct net *initial_net; /* Purpose of this is to carry net pointer 414 * during the probe time only. 415 */ 416 unsigned int max_vfs; 417 unsigned int num_vfs; 418 bool init; 419 }; 420 421 int nsim_bus_init(void); 422 void nsim_bus_exit(void); 423