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