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/ethtool_netlink.h> 20 #include <linux/kernel.h> 21 #include <linux/list.h> 22 #include <linux/netdevice.h> 23 #include <linux/ptp_mock.h> 24 #include <linux/u64_stats_sync.h> 25 #include <net/devlink.h> 26 #include <net/udp_tunnel.h> 27 #include <net/xdp.h> 28 #include <net/macsec.h> 29 30 #define DRV_NAME "netdevsim" 31 32 #define NSIM_XDP_MAX_MTU 4000 33 34 #define NSIM_EA(extack, msg) NL_SET_ERR_MSG_MOD((extack), msg) 35 36 #define NSIM_IPSEC_MAX_SA_COUNT 33 37 #define NSIM_IPSEC_VALID BIT(31) 38 #define NSIM_UDP_TUNNEL_N_PORTS 4 39 40 #define NSIM_HDS_THRESHOLD_MAX 1024 41 42 struct nsim_sa { 43 struct xfrm_state *xs; 44 __be32 ipaddr[4]; 45 u32 key[4]; 46 u32 salt; 47 bool used; 48 bool crypt; 49 bool rx; 50 }; 51 52 struct nsim_ipsec { 53 struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT]; 54 struct dentry *pfile; 55 u32 count; 56 u32 tx; 57 }; 58 59 #define NSIM_MACSEC_MAX_SECY_COUNT 3 60 #define NSIM_MACSEC_MAX_RXSC_COUNT 1 61 struct nsim_rxsc { 62 sci_t sci; 63 bool used; 64 }; 65 66 struct nsim_secy { 67 sci_t sci; 68 struct nsim_rxsc nsim_rxsc[NSIM_MACSEC_MAX_RXSC_COUNT]; 69 u8 nsim_rxsc_count; 70 bool used; 71 }; 72 73 struct nsim_macsec { 74 struct nsim_secy nsim_secy[NSIM_MACSEC_MAX_SECY_COUNT]; 75 u8 nsim_secy_count; 76 }; 77 78 struct nsim_ethtool_pauseparam { 79 bool rx; 80 bool tx; 81 bool report_stats_rx; 82 bool report_stats_tx; 83 }; 84 85 struct nsim_ethtool { 86 u32 get_err; 87 u32 set_err; 88 u32 channels; 89 struct nsim_ethtool_pauseparam pauseparam; 90 struct ethtool_coalesce coalesce; 91 struct ethtool_ringparam ring; 92 struct ethtool_fecparam fec; 93 }; 94 95 struct nsim_rq { 96 struct napi_struct napi; 97 struct sk_buff_head skb_queue; 98 struct page_pool *page_pool; 99 struct hrtimer napi_timer; 100 }; 101 102 struct netdevsim { 103 struct net_device *netdev; 104 struct nsim_dev *nsim_dev; 105 struct nsim_dev_port *nsim_dev_port; 106 struct mock_phc *phc; 107 struct nsim_rq **rq; 108 109 int rq_reset_mode; 110 111 struct { 112 u64 rx_packets; 113 u64 rx_bytes; 114 u64 tx_packets; 115 u64 tx_bytes; 116 struct u64_stats_sync syncp; 117 struct psp_dev *dev; 118 u32 spi; 119 u32 assoc_cnt; 120 } psp; 121 122 struct nsim_bus_dev *nsim_bus_dev; 123 124 struct bpf_prog *bpf_offloaded; 125 u32 bpf_offloaded_id; 126 127 struct xdp_attachment_info xdp; 128 struct xdp_attachment_info xdp_hw; 129 130 bool bpf_tc_accept; 131 bool bpf_tc_non_bound_accept; 132 bool bpf_xdpdrv_accept; 133 bool bpf_xdpoffload_accept; 134 135 bool bpf_map_accept; 136 struct nsim_ipsec ipsec; 137 struct nsim_macsec macsec; 138 struct { 139 u32 inject_error; 140 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS]; 141 u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS]; 142 struct dentry *ddir; 143 struct debugfs_u32_array dfs_ports[2]; 144 } udp_ports; 145 146 struct page *page; 147 struct dentry *pp_dfs; 148 struct dentry *qr_dfs; 149 150 struct nsim_ethtool ethtool; 151 struct netdevsim __rcu *peer; 152 153 struct notifier_block nb; 154 struct netdev_net_notifier nn; 155 }; 156 157 struct netdevsim *nsim_create(struct nsim_dev *nsim_dev, 158 struct nsim_dev_port *nsim_dev_port, 159 u8 perm_addr[ETH_ALEN]); 160 void nsim_destroy(struct netdevsim *ns); 161 bool netdev_is_nsim(struct net_device *dev); 162 163 void nsim_ethtool_init(struct netdevsim *ns); 164 165 void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev); 166 int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev, 167 struct net_device *dev); 168 void nsim_udp_tunnels_info_destroy(struct net_device *dev); 169 170 #ifdef CONFIG_BPF_SYSCALL 171 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev); 172 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev); 173 int nsim_bpf_init(struct netdevsim *ns); 174 void nsim_bpf_uninit(struct netdevsim *ns); 175 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf); 176 int nsim_bpf_disable_tc(struct netdevsim *ns); 177 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, 178 void *type_data, void *cb_priv); 179 #else 180 181 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev) 182 { 183 return 0; 184 } 185 186 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev) 187 { 188 } 189 static inline int nsim_bpf_init(struct netdevsim *ns) 190 { 191 return 0; 192 } 193 194 static inline void nsim_bpf_uninit(struct netdevsim *ns) 195 { 196 } 197 198 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf) 199 { 200 return -EOPNOTSUPP; 201 } 202 203 static inline int nsim_bpf_disable_tc(struct netdevsim *ns) 204 { 205 return 0; 206 } 207 208 static inline int 209 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 210 void *cb_priv) 211 { 212 return -EOPNOTSUPP; 213 } 214 #endif 215 216 enum nsim_resource_id { 217 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */ 218 NSIM_RESOURCE_IPV4, 219 NSIM_RESOURCE_IPV4_FIB, 220 NSIM_RESOURCE_IPV4_FIB_RULES, 221 NSIM_RESOURCE_IPV6, 222 NSIM_RESOURCE_IPV6_FIB, 223 NSIM_RESOURCE_IPV6_FIB_RULES, 224 NSIM_RESOURCE_NEXTHOPS, 225 }; 226 227 struct nsim_dev_health { 228 struct devlink_health_reporter *empty_reporter; 229 struct devlink_health_reporter *dummy_reporter; 230 struct dentry *ddir; 231 char *recovered_break_msg; 232 u32 binary_len; 233 bool fail_recover; 234 }; 235 236 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink); 237 void nsim_dev_health_exit(struct nsim_dev *nsim_dev); 238 239 struct nsim_dev_hwstats_netdev { 240 struct list_head list; 241 struct net_device *netdev; 242 struct rtnl_hw_stats64 stats; 243 bool enabled; 244 bool fail_enable; 245 }; 246 247 struct nsim_dev_hwstats { 248 struct dentry *ddir; 249 struct dentry *l3_ddir; 250 251 struct mutex hwsdev_list_lock; /* protects hwsdev list(s) */ 252 struct list_head l3_list; 253 254 struct notifier_block netdevice_nb; 255 struct delayed_work traffic_dw; 256 }; 257 258 int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev); 259 void nsim_dev_hwstats_exit(struct nsim_dev *nsim_dev); 260 261 #if IS_ENABLED(CONFIG_PSAMPLE) 262 int nsim_dev_psample_init(struct nsim_dev *nsim_dev); 263 void nsim_dev_psample_exit(struct nsim_dev *nsim_dev); 264 #else 265 static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev) 266 { 267 return 0; 268 } 269 270 static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev) 271 { 272 } 273 #endif 274 275 enum nsim_dev_port_type { 276 NSIM_DEV_PORT_TYPE_PF, 277 NSIM_DEV_PORT_TYPE_VF, 278 }; 279 280 #define NSIM_DEV_VF_PORT_INDEX_BASE 128 281 #define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX 282 283 struct nsim_dev_port { 284 struct list_head list; 285 struct devlink_port devlink_port; 286 unsigned int port_index; 287 enum nsim_dev_port_type port_type; 288 struct dentry *ddir; 289 struct dentry *rate_parent; 290 char *parent_name; 291 u32 tc_bw[DEVLINK_RATE_TCS_MAX]; 292 struct netdevsim *ns; 293 }; 294 295 struct nsim_vf_config { 296 int link_state; 297 u16 min_tx_rate; 298 u16 max_tx_rate; 299 u16 vlan; 300 __be16 vlan_proto; 301 u16 qos; 302 u8 vf_mac[ETH_ALEN]; 303 bool spoofchk_enabled; 304 bool trusted; 305 bool rss_query_enabled; 306 }; 307 308 struct nsim_dev { 309 struct nsim_bus_dev *nsim_bus_dev; 310 struct nsim_fib_data *fib_data; 311 struct nsim_trap_data *trap_data; 312 struct dentry *ddir; 313 struct dentry *ports_ddir; 314 struct dentry *take_snapshot; 315 struct dentry *nodes_ddir; 316 317 struct nsim_vf_config *vfconfigs; 318 319 struct bpf_offload_dev *bpf_dev; 320 bool bpf_bind_accept; 321 bool bpf_bind_verifier_accept; 322 u32 bpf_bind_verifier_delay; 323 struct dentry *ddir_bpf_bound_progs; 324 u32 prog_id_gen; 325 struct list_head bpf_bound_progs; 326 struct list_head bpf_bound_maps; 327 struct netdev_phys_item_id switch_id; 328 struct list_head port_list; 329 bool fw_update_status; 330 u32 fw_update_overwrite_mask; 331 u32 fw_update_flash_chunk_time_ms; 332 u32 max_macs; 333 bool test1; 334 u32 test2; 335 bool dont_allow_reload; 336 bool fail_reload; 337 struct devlink_region *dummy_region; 338 struct nsim_dev_health health; 339 struct nsim_dev_hwstats hwstats; 340 struct flow_action_cookie *fa_cookie; 341 spinlock_t fa_cookie_lock; /* protects fa_cookie */ 342 bool fail_trap_group_set; 343 bool fail_trap_policer_set; 344 bool fail_trap_policer_counter_get; 345 bool fail_trap_drop_counter_get; 346 struct { 347 struct udp_tunnel_nic_shared utn_shared; 348 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS]; 349 bool sync_all; 350 bool open_only; 351 bool ipv4_only; 352 bool shared; 353 bool static_iana_vxlan; 354 } udp_ports; 355 struct nsim_dev_psample *psample; 356 u16 esw_mode; 357 }; 358 359 static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev) 360 { 361 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY; 362 } 363 364 static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev) 365 { 366 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV; 367 } 368 369 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev) 370 { 371 return devlink_net(priv_to_devlink(nsim_dev)); 372 } 373 374 int nsim_dev_init(void); 375 void nsim_dev_exit(void); 376 int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev); 377 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev); 378 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, 379 enum nsim_dev_port_type type, unsigned int port_index, 380 u8 perm_addr[ETH_ALEN]); 381 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, 382 enum nsim_dev_port_type type, 383 unsigned int port_index); 384 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev, 385 unsigned int num_vfs); 386 387 unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev); 388 389 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink, 390 struct netlink_ext_ack *extack); 391 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data); 392 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data, 393 enum nsim_resource_id res_id, bool max); 394 395 static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port) 396 { 397 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF; 398 } 399 400 static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port) 401 { 402 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF; 403 } 404 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD) 405 void nsim_ipsec_init(struct netdevsim *ns); 406 void nsim_ipsec_teardown(struct netdevsim *ns); 407 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb); 408 #else 409 static inline void nsim_ipsec_init(struct netdevsim *ns) 410 { 411 } 412 413 static inline void nsim_ipsec_teardown(struct netdevsim *ns) 414 { 415 } 416 417 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb) 418 { 419 return true; 420 } 421 #endif 422 423 #if IS_ENABLED(CONFIG_MACSEC) 424 void nsim_macsec_init(struct netdevsim *ns); 425 void nsim_macsec_teardown(struct netdevsim *ns); 426 #else 427 static inline void nsim_macsec_init(struct netdevsim *ns) 428 { 429 } 430 431 static inline void nsim_macsec_teardown(struct netdevsim *ns) 432 { 433 } 434 #endif 435 436 #if IS_ENABLED(CONFIG_INET_PSP) 437 int nsim_psp_init(struct netdevsim *ns); 438 void nsim_psp_uninit(struct netdevsim *ns); 439 void nsim_psp_handle_ext(struct sk_buff *skb, struct skb_ext *psp_ext); 440 enum skb_drop_reason 441 nsim_do_psp(struct sk_buff *skb, struct netdevsim *ns, 442 struct netdevsim *peer_ns, struct skb_ext **psp_ext); 443 #else 444 static inline int nsim_psp_init(struct netdevsim *ns) { return 0; } 445 static inline void nsim_psp_uninit(struct netdevsim *ns) {} 446 static inline enum skb_drop_reason 447 nsim_do_psp(struct sk_buff *skb, struct netdevsim *ns, 448 struct netdevsim *peer_ns, struct skb_ext **psp_ext) 449 { 450 return 0; 451 } 452 453 static inline void 454 nsim_psp_handle_ext(struct sk_buff *skb, struct skb_ext *psp_ext) {} 455 #endif 456 457 struct nsim_bus_dev { 458 struct device dev; 459 struct list_head list; 460 unsigned int port_count; 461 unsigned int num_queues; /* Number of queues for each port on this bus */ 462 struct net *initial_net; /* Purpose of this is to carry net pointer 463 * during the probe time only. 464 */ 465 unsigned int max_vfs; 466 unsigned int num_vfs; 467 bool init; 468 }; 469 470 int nsim_bus_init(void); 471 void nsim_bus_exit(void); 472