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 u64 tx_packets; 112 u64 tx_bytes; 113 u64 tx_dropped; 114 struct u64_stats_sync syncp; 115 116 struct nsim_bus_dev *nsim_bus_dev; 117 118 struct bpf_prog *bpf_offloaded; 119 u32 bpf_offloaded_id; 120 121 struct xdp_attachment_info xdp; 122 struct xdp_attachment_info xdp_hw; 123 124 bool bpf_tc_accept; 125 bool bpf_tc_non_bound_accept; 126 bool bpf_xdpdrv_accept; 127 bool bpf_xdpoffload_accept; 128 129 bool bpf_map_accept; 130 struct nsim_ipsec ipsec; 131 struct nsim_macsec macsec; 132 struct { 133 u32 inject_error; 134 u32 sleep; 135 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS]; 136 u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS]; 137 struct dentry *ddir; 138 struct debugfs_u32_array dfs_ports[2]; 139 } udp_ports; 140 141 struct page *page; 142 struct dentry *pp_dfs; 143 struct dentry *qr_dfs; 144 145 struct nsim_ethtool ethtool; 146 struct netdevsim __rcu *peer; 147 148 struct notifier_block nb; 149 struct netdev_net_notifier nn; 150 }; 151 152 struct netdevsim * 153 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port); 154 void nsim_destroy(struct netdevsim *ns); 155 bool netdev_is_nsim(struct net_device *dev); 156 157 void nsim_ethtool_init(struct netdevsim *ns); 158 159 void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev); 160 int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev, 161 struct net_device *dev); 162 void nsim_udp_tunnels_info_destroy(struct net_device *dev); 163 164 #ifdef CONFIG_BPF_SYSCALL 165 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev); 166 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev); 167 int nsim_bpf_init(struct netdevsim *ns); 168 void nsim_bpf_uninit(struct netdevsim *ns); 169 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf); 170 int nsim_bpf_disable_tc(struct netdevsim *ns); 171 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, 172 void *type_data, void *cb_priv); 173 #else 174 175 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev) 176 { 177 return 0; 178 } 179 180 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev) 181 { 182 } 183 static inline int nsim_bpf_init(struct netdevsim *ns) 184 { 185 return 0; 186 } 187 188 static inline void nsim_bpf_uninit(struct netdevsim *ns) 189 { 190 } 191 192 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf) 193 { 194 return -EOPNOTSUPP; 195 } 196 197 static inline int nsim_bpf_disable_tc(struct netdevsim *ns) 198 { 199 return 0; 200 } 201 202 static inline int 203 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 204 void *cb_priv) 205 { 206 return -EOPNOTSUPP; 207 } 208 #endif 209 210 enum nsim_resource_id { 211 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */ 212 NSIM_RESOURCE_IPV4, 213 NSIM_RESOURCE_IPV4_FIB, 214 NSIM_RESOURCE_IPV4_FIB_RULES, 215 NSIM_RESOURCE_IPV6, 216 NSIM_RESOURCE_IPV6_FIB, 217 NSIM_RESOURCE_IPV6_FIB_RULES, 218 NSIM_RESOURCE_NEXTHOPS, 219 }; 220 221 struct nsim_dev_health { 222 struct devlink_health_reporter *empty_reporter; 223 struct devlink_health_reporter *dummy_reporter; 224 struct dentry *ddir; 225 char *recovered_break_msg; 226 u32 binary_len; 227 bool fail_recover; 228 }; 229 230 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink); 231 void nsim_dev_health_exit(struct nsim_dev *nsim_dev); 232 233 struct nsim_dev_hwstats_netdev { 234 struct list_head list; 235 struct net_device *netdev; 236 struct rtnl_hw_stats64 stats; 237 bool enabled; 238 bool fail_enable; 239 }; 240 241 struct nsim_dev_hwstats { 242 struct dentry *ddir; 243 struct dentry *l3_ddir; 244 245 struct mutex hwsdev_list_lock; /* protects hwsdev list(s) */ 246 struct list_head l3_list; 247 248 struct notifier_block netdevice_nb; 249 struct delayed_work traffic_dw; 250 }; 251 252 int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev); 253 void nsim_dev_hwstats_exit(struct nsim_dev *nsim_dev); 254 255 #if IS_ENABLED(CONFIG_PSAMPLE) 256 int nsim_dev_psample_init(struct nsim_dev *nsim_dev); 257 void nsim_dev_psample_exit(struct nsim_dev *nsim_dev); 258 #else 259 static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev) 260 { 261 return 0; 262 } 263 264 static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev) 265 { 266 } 267 #endif 268 269 enum nsim_dev_port_type { 270 NSIM_DEV_PORT_TYPE_PF, 271 NSIM_DEV_PORT_TYPE_VF, 272 }; 273 274 #define NSIM_DEV_VF_PORT_INDEX_BASE 128 275 #define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX 276 277 struct nsim_dev_port { 278 struct list_head list; 279 struct devlink_port devlink_port; 280 unsigned int port_index; 281 enum nsim_dev_port_type port_type; 282 struct dentry *ddir; 283 struct dentry *rate_parent; 284 char *parent_name; 285 struct netdevsim *ns; 286 }; 287 288 struct nsim_vf_config { 289 int link_state; 290 u16 min_tx_rate; 291 u16 max_tx_rate; 292 u16 vlan; 293 __be16 vlan_proto; 294 u16 qos; 295 u8 vf_mac[ETH_ALEN]; 296 bool spoofchk_enabled; 297 bool trusted; 298 bool rss_query_enabled; 299 }; 300 301 struct nsim_dev { 302 struct nsim_bus_dev *nsim_bus_dev; 303 struct nsim_fib_data *fib_data; 304 struct nsim_trap_data *trap_data; 305 struct dentry *ddir; 306 struct dentry *ports_ddir; 307 struct dentry *take_snapshot; 308 struct dentry *nodes_ddir; 309 310 struct nsim_vf_config *vfconfigs; 311 312 struct bpf_offload_dev *bpf_dev; 313 bool bpf_bind_accept; 314 bool bpf_bind_verifier_accept; 315 u32 bpf_bind_verifier_delay; 316 struct dentry *ddir_bpf_bound_progs; 317 u32 prog_id_gen; 318 struct list_head bpf_bound_progs; 319 struct list_head bpf_bound_maps; 320 struct netdev_phys_item_id switch_id; 321 struct list_head port_list; 322 bool fw_update_status; 323 u32 fw_update_overwrite_mask; 324 u32 max_macs; 325 bool test1; 326 bool dont_allow_reload; 327 bool fail_reload; 328 struct devlink_region *dummy_region; 329 struct nsim_dev_health health; 330 struct nsim_dev_hwstats hwstats; 331 struct flow_action_cookie *fa_cookie; 332 spinlock_t fa_cookie_lock; /* protects fa_cookie */ 333 bool fail_trap_group_set; 334 bool fail_trap_policer_set; 335 bool fail_trap_policer_counter_get; 336 bool fail_trap_drop_counter_get; 337 struct { 338 struct udp_tunnel_nic_shared utn_shared; 339 u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS]; 340 bool sync_all; 341 bool open_only; 342 bool ipv4_only; 343 bool shared; 344 bool static_iana_vxlan; 345 u32 sleep; 346 } udp_ports; 347 struct nsim_dev_psample *psample; 348 u16 esw_mode; 349 }; 350 351 static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev) 352 { 353 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY; 354 } 355 356 static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev) 357 { 358 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV; 359 } 360 361 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev) 362 { 363 return devlink_net(priv_to_devlink(nsim_dev)); 364 } 365 366 int nsim_dev_init(void); 367 void nsim_dev_exit(void); 368 int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev); 369 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev); 370 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, 371 enum nsim_dev_port_type type, 372 unsigned int port_index); 373 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, 374 enum nsim_dev_port_type type, 375 unsigned int port_index); 376 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev, 377 unsigned int num_vfs); 378 379 unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev); 380 381 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink, 382 struct netlink_ext_ack *extack); 383 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data); 384 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data, 385 enum nsim_resource_id res_id, bool max); 386 387 static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port) 388 { 389 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF; 390 } 391 392 static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port) 393 { 394 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF; 395 } 396 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD) 397 void nsim_ipsec_init(struct netdevsim *ns); 398 void nsim_ipsec_teardown(struct netdevsim *ns); 399 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb); 400 #else 401 static inline void nsim_ipsec_init(struct netdevsim *ns) 402 { 403 } 404 405 static inline void nsim_ipsec_teardown(struct netdevsim *ns) 406 { 407 } 408 409 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb) 410 { 411 return true; 412 } 413 #endif 414 415 #if IS_ENABLED(CONFIG_MACSEC) 416 void nsim_macsec_init(struct netdevsim *ns); 417 void nsim_macsec_teardown(struct netdevsim *ns); 418 #else 419 static inline void nsim_macsec_init(struct netdevsim *ns) 420 { 421 } 422 423 static inline void nsim_macsec_teardown(struct netdevsim *ns) 424 { 425 } 426 #endif 427 428 struct nsim_bus_dev { 429 struct device dev; 430 struct list_head list; 431 unsigned int port_count; 432 unsigned int num_queues; /* Number of queues for each port on this bus */ 433 struct net *initial_net; /* Purpose of this is to carry net pointer 434 * during the probe time only. 435 */ 436 unsigned int max_vfs; 437 unsigned int num_vfs; 438 bool init; 439 }; 440 441 int nsim_bus_init(void); 442 void nsim_bus_exit(void); 443