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 nsim_rq { 94 struct napi_struct napi; 95 struct sk_buff_head skb_queue; 96 struct page_pool *page_pool; 97 }; 98 99 struct netdevsim { 100 struct net_device *netdev; 101 struct nsim_dev *nsim_dev; 102 struct nsim_dev_port *nsim_dev_port; 103 struct mock_phc *phc; 104 struct nsim_rq *rq; 105 106 u64 tx_packets; 107 u64 tx_bytes; 108 u64 tx_dropped; 109 struct u64_stats_sync syncp; 110 111 struct nsim_bus_dev *nsim_bus_dev; 112 113 struct bpf_prog *bpf_offloaded; 114 u32 bpf_offloaded_id; 115 116 struct xdp_attachment_info xdp; 117 struct xdp_attachment_info xdp_hw; 118 119 bool bpf_tc_accept; 120 bool bpf_tc_non_bound_accept; 121 bool bpf_xdpdrv_accept; 122 bool bpf_xdpoffload_accept; 123 124 bool bpf_map_accept; 125 struct nsim_ipsec ipsec; 126 struct nsim_macsec macsec; 127 struct { 128 u32 inject_error; 129 u32 sleep; 130 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS]; 131 u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS]; 132 struct debugfs_u32_array dfs_ports[2]; 133 } udp_ports; 134 135 struct page *page; 136 struct dentry *pp_dfs; 137 138 struct nsim_ethtool ethtool; 139 struct netdevsim __rcu *peer; 140 }; 141 142 struct netdevsim * 143 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port); 144 void nsim_destroy(struct netdevsim *ns); 145 bool netdev_is_nsim(struct net_device *dev); 146 147 void nsim_ethtool_init(struct netdevsim *ns); 148 149 void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev); 150 int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev, 151 struct net_device *dev); 152 void nsim_udp_tunnels_info_destroy(struct net_device *dev); 153 154 #ifdef CONFIG_BPF_SYSCALL 155 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev); 156 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev); 157 int nsim_bpf_init(struct netdevsim *ns); 158 void nsim_bpf_uninit(struct netdevsim *ns); 159 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf); 160 int nsim_bpf_disable_tc(struct netdevsim *ns); 161 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, 162 void *type_data, void *cb_priv); 163 #else 164 165 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev) 166 { 167 return 0; 168 } 169 170 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev) 171 { 172 } 173 static inline int nsim_bpf_init(struct netdevsim *ns) 174 { 175 return 0; 176 } 177 178 static inline void nsim_bpf_uninit(struct netdevsim *ns) 179 { 180 } 181 182 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf) 183 { 184 return -EOPNOTSUPP; 185 } 186 187 static inline int nsim_bpf_disable_tc(struct netdevsim *ns) 188 { 189 return 0; 190 } 191 192 static inline int 193 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 194 void *cb_priv) 195 { 196 return -EOPNOTSUPP; 197 } 198 #endif 199 200 enum nsim_resource_id { 201 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */ 202 NSIM_RESOURCE_IPV4, 203 NSIM_RESOURCE_IPV4_FIB, 204 NSIM_RESOURCE_IPV4_FIB_RULES, 205 NSIM_RESOURCE_IPV6, 206 NSIM_RESOURCE_IPV6_FIB, 207 NSIM_RESOURCE_IPV6_FIB_RULES, 208 NSIM_RESOURCE_NEXTHOPS, 209 }; 210 211 struct nsim_dev_health { 212 struct devlink_health_reporter *empty_reporter; 213 struct devlink_health_reporter *dummy_reporter; 214 struct dentry *ddir; 215 char *recovered_break_msg; 216 u32 binary_len; 217 bool fail_recover; 218 }; 219 220 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink); 221 void nsim_dev_health_exit(struct nsim_dev *nsim_dev); 222 223 struct nsim_dev_hwstats_netdev { 224 struct list_head list; 225 struct net_device *netdev; 226 struct rtnl_hw_stats64 stats; 227 bool enabled; 228 bool fail_enable; 229 }; 230 231 struct nsim_dev_hwstats { 232 struct dentry *ddir; 233 struct dentry *l3_ddir; 234 235 struct mutex hwsdev_list_lock; /* protects hwsdev list(s) */ 236 struct list_head l3_list; 237 238 struct notifier_block netdevice_nb; 239 struct delayed_work traffic_dw; 240 }; 241 242 int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev); 243 void nsim_dev_hwstats_exit(struct nsim_dev *nsim_dev); 244 245 #if IS_ENABLED(CONFIG_PSAMPLE) 246 int nsim_dev_psample_init(struct nsim_dev *nsim_dev); 247 void nsim_dev_psample_exit(struct nsim_dev *nsim_dev); 248 #else 249 static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev) 250 { 251 return 0; 252 } 253 254 static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev) 255 { 256 } 257 #endif 258 259 enum nsim_dev_port_type { 260 NSIM_DEV_PORT_TYPE_PF, 261 NSIM_DEV_PORT_TYPE_VF, 262 }; 263 264 #define NSIM_DEV_VF_PORT_INDEX_BASE 128 265 #define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX 266 267 struct nsim_dev_port { 268 struct list_head list; 269 struct devlink_port devlink_port; 270 unsigned int port_index; 271 enum nsim_dev_port_type port_type; 272 struct dentry *ddir; 273 struct dentry *rate_parent; 274 char *parent_name; 275 struct netdevsim *ns; 276 }; 277 278 struct nsim_vf_config { 279 int link_state; 280 u16 min_tx_rate; 281 u16 max_tx_rate; 282 u16 vlan; 283 __be16 vlan_proto; 284 u16 qos; 285 u8 vf_mac[ETH_ALEN]; 286 bool spoofchk_enabled; 287 bool trusted; 288 bool rss_query_enabled; 289 }; 290 291 struct nsim_dev { 292 struct nsim_bus_dev *nsim_bus_dev; 293 struct nsim_fib_data *fib_data; 294 struct nsim_trap_data *trap_data; 295 struct dentry *ddir; 296 struct dentry *ports_ddir; 297 struct dentry *take_snapshot; 298 struct dentry *nodes_ddir; 299 300 struct nsim_vf_config *vfconfigs; 301 302 struct bpf_offload_dev *bpf_dev; 303 bool bpf_bind_accept; 304 bool bpf_bind_verifier_accept; 305 u32 bpf_bind_verifier_delay; 306 struct dentry *ddir_bpf_bound_progs; 307 u32 prog_id_gen; 308 struct list_head bpf_bound_progs; 309 struct list_head bpf_bound_maps; 310 struct netdev_phys_item_id switch_id; 311 struct list_head port_list; 312 bool fw_update_status; 313 u32 fw_update_overwrite_mask; 314 u32 max_macs; 315 bool test1; 316 bool dont_allow_reload; 317 bool fail_reload; 318 struct devlink_region *dummy_region; 319 struct nsim_dev_health health; 320 struct nsim_dev_hwstats hwstats; 321 struct flow_action_cookie *fa_cookie; 322 spinlock_t fa_cookie_lock; /* protects fa_cookie */ 323 bool fail_trap_group_set; 324 bool fail_trap_policer_set; 325 bool fail_trap_policer_counter_get; 326 bool fail_trap_drop_counter_get; 327 struct { 328 struct udp_tunnel_nic_shared utn_shared; 329 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS]; 330 bool sync_all; 331 bool open_only; 332 bool ipv4_only; 333 bool shared; 334 bool static_iana_vxlan; 335 u32 sleep; 336 } udp_ports; 337 struct nsim_dev_psample *psample; 338 u16 esw_mode; 339 }; 340 341 static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev) 342 { 343 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY; 344 } 345 346 static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev) 347 { 348 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV; 349 } 350 351 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev) 352 { 353 return devlink_net(priv_to_devlink(nsim_dev)); 354 } 355 356 int nsim_dev_init(void); 357 void nsim_dev_exit(void); 358 int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev); 359 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev); 360 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, 361 enum nsim_dev_port_type type, 362 unsigned int port_index); 363 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, 364 enum nsim_dev_port_type type, 365 unsigned int port_index); 366 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev, 367 unsigned int num_vfs); 368 369 unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev); 370 371 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink, 372 struct netlink_ext_ack *extack); 373 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data); 374 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data, 375 enum nsim_resource_id res_id, bool max); 376 377 static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port) 378 { 379 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF; 380 } 381 382 static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port) 383 { 384 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF; 385 } 386 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD) 387 void nsim_ipsec_init(struct netdevsim *ns); 388 void nsim_ipsec_teardown(struct netdevsim *ns); 389 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb); 390 #else 391 static inline void nsim_ipsec_init(struct netdevsim *ns) 392 { 393 } 394 395 static inline void nsim_ipsec_teardown(struct netdevsim *ns) 396 { 397 } 398 399 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb) 400 { 401 return true; 402 } 403 #endif 404 405 #if IS_ENABLED(CONFIG_MACSEC) 406 void nsim_macsec_init(struct netdevsim *ns); 407 void nsim_macsec_teardown(struct netdevsim *ns); 408 #else 409 static inline void nsim_macsec_init(struct netdevsim *ns) 410 { 411 } 412 413 static inline void nsim_macsec_teardown(struct netdevsim *ns) 414 { 415 } 416 #endif 417 418 struct nsim_bus_dev { 419 struct device dev; 420 struct list_head list; 421 unsigned int port_count; 422 unsigned int num_queues; /* Number of queues for each port on this bus */ 423 struct net *initial_net; /* Purpose of this is to carry net pointer 424 * during the probe time only. 425 */ 426 unsigned int max_vfs; 427 unsigned int num_vfs; 428 bool init; 429 }; 430 431 int nsim_bus_init(void); 432 void nsim_bus_exit(void); 433