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 u32 ok; 58 }; 59 60 #define NSIM_MACSEC_MAX_SECY_COUNT 3 61 #define NSIM_MACSEC_MAX_RXSC_COUNT 1 62 struct nsim_rxsc { 63 sci_t sci; 64 bool used; 65 }; 66 67 struct nsim_secy { 68 sci_t sci; 69 struct nsim_rxsc nsim_rxsc[NSIM_MACSEC_MAX_RXSC_COUNT]; 70 u8 nsim_rxsc_count; 71 bool used; 72 }; 73 74 struct nsim_macsec { 75 struct nsim_secy nsim_secy[NSIM_MACSEC_MAX_SECY_COUNT]; 76 u8 nsim_secy_count; 77 }; 78 79 struct nsim_ethtool_pauseparam { 80 bool rx; 81 bool tx; 82 bool report_stats_rx; 83 bool report_stats_tx; 84 }; 85 86 struct nsim_ethtool { 87 u32 get_err; 88 u32 set_err; 89 u32 channels; 90 struct nsim_ethtool_pauseparam pauseparam; 91 struct ethtool_coalesce coalesce; 92 struct ethtool_ringparam ring; 93 struct ethtool_fecparam fec; 94 }; 95 96 struct nsim_rq { 97 struct napi_struct napi; 98 struct sk_buff_head skb_queue; 99 struct page_pool *page_pool; 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 debugfs_u32_array dfs_ports[2]; 138 } udp_ports; 139 140 struct page *page; 141 struct dentry *pp_dfs; 142 struct dentry *qr_dfs; 143 144 struct nsim_ethtool ethtool; 145 struct netdevsim __rcu *peer; 146 }; 147 148 struct netdevsim * 149 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port); 150 void nsim_destroy(struct netdevsim *ns); 151 bool netdev_is_nsim(struct net_device *dev); 152 153 void nsim_ethtool_init(struct netdevsim *ns); 154 155 void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev); 156 int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev, 157 struct net_device *dev); 158 void nsim_udp_tunnels_info_destroy(struct net_device *dev); 159 160 #ifdef CONFIG_BPF_SYSCALL 161 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev); 162 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev); 163 int nsim_bpf_init(struct netdevsim *ns); 164 void nsim_bpf_uninit(struct netdevsim *ns); 165 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf); 166 int nsim_bpf_disable_tc(struct netdevsim *ns); 167 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, 168 void *type_data, void *cb_priv); 169 #else 170 171 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev) 172 { 173 return 0; 174 } 175 176 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev) 177 { 178 } 179 static inline int nsim_bpf_init(struct netdevsim *ns) 180 { 181 return 0; 182 } 183 184 static inline void nsim_bpf_uninit(struct netdevsim *ns) 185 { 186 } 187 188 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf) 189 { 190 return -EOPNOTSUPP; 191 } 192 193 static inline int nsim_bpf_disable_tc(struct netdevsim *ns) 194 { 195 return 0; 196 } 197 198 static inline int 199 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data, 200 void *cb_priv) 201 { 202 return -EOPNOTSUPP; 203 } 204 #endif 205 206 enum nsim_resource_id { 207 NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */ 208 NSIM_RESOURCE_IPV4, 209 NSIM_RESOURCE_IPV4_FIB, 210 NSIM_RESOURCE_IPV4_FIB_RULES, 211 NSIM_RESOURCE_IPV6, 212 NSIM_RESOURCE_IPV6_FIB, 213 NSIM_RESOURCE_IPV6_FIB_RULES, 214 NSIM_RESOURCE_NEXTHOPS, 215 }; 216 217 struct nsim_dev_health { 218 struct devlink_health_reporter *empty_reporter; 219 struct devlink_health_reporter *dummy_reporter; 220 struct dentry *ddir; 221 char *recovered_break_msg; 222 u32 binary_len; 223 bool fail_recover; 224 }; 225 226 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink); 227 void nsim_dev_health_exit(struct nsim_dev *nsim_dev); 228 229 struct nsim_dev_hwstats_netdev { 230 struct list_head list; 231 struct net_device *netdev; 232 struct rtnl_hw_stats64 stats; 233 bool enabled; 234 bool fail_enable; 235 }; 236 237 struct nsim_dev_hwstats { 238 struct dentry *ddir; 239 struct dentry *l3_ddir; 240 241 struct mutex hwsdev_list_lock; /* protects hwsdev list(s) */ 242 struct list_head l3_list; 243 244 struct notifier_block netdevice_nb; 245 struct delayed_work traffic_dw; 246 }; 247 248 int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev); 249 void nsim_dev_hwstats_exit(struct nsim_dev *nsim_dev); 250 251 #if IS_ENABLED(CONFIG_PSAMPLE) 252 int nsim_dev_psample_init(struct nsim_dev *nsim_dev); 253 void nsim_dev_psample_exit(struct nsim_dev *nsim_dev); 254 #else 255 static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev) 256 { 257 return 0; 258 } 259 260 static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev) 261 { 262 } 263 #endif 264 265 enum nsim_dev_port_type { 266 NSIM_DEV_PORT_TYPE_PF, 267 NSIM_DEV_PORT_TYPE_VF, 268 }; 269 270 #define NSIM_DEV_VF_PORT_INDEX_BASE 128 271 #define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX 272 273 struct nsim_dev_port { 274 struct list_head list; 275 struct devlink_port devlink_port; 276 unsigned int port_index; 277 enum nsim_dev_port_type port_type; 278 struct dentry *ddir; 279 struct dentry *rate_parent; 280 char *parent_name; 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 u32 sleep; 342 } udp_ports; 343 struct nsim_dev_psample *psample; 344 u16 esw_mode; 345 }; 346 347 static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev) 348 { 349 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY; 350 } 351 352 static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev) 353 { 354 return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV; 355 } 356 357 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev) 358 { 359 return devlink_net(priv_to_devlink(nsim_dev)); 360 } 361 362 int nsim_dev_init(void); 363 void nsim_dev_exit(void); 364 int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev); 365 void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev); 366 int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev, 367 enum nsim_dev_port_type type, 368 unsigned int port_index); 369 int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev, 370 enum nsim_dev_port_type type, 371 unsigned int port_index); 372 int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev, 373 unsigned int num_vfs); 374 375 unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev); 376 377 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink, 378 struct netlink_ext_ack *extack); 379 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data); 380 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data, 381 enum nsim_resource_id res_id, bool max); 382 383 static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port) 384 { 385 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF; 386 } 387 388 static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port) 389 { 390 return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF; 391 } 392 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD) 393 void nsim_ipsec_init(struct netdevsim *ns); 394 void nsim_ipsec_teardown(struct netdevsim *ns); 395 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb); 396 #else 397 static inline void nsim_ipsec_init(struct netdevsim *ns) 398 { 399 } 400 401 static inline void nsim_ipsec_teardown(struct netdevsim *ns) 402 { 403 } 404 405 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb) 406 { 407 return true; 408 } 409 #endif 410 411 #if IS_ENABLED(CONFIG_MACSEC) 412 void nsim_macsec_init(struct netdevsim *ns); 413 void nsim_macsec_teardown(struct netdevsim *ns); 414 #else 415 static inline void nsim_macsec_init(struct netdevsim *ns) 416 { 417 } 418 419 static inline void nsim_macsec_teardown(struct netdevsim *ns) 420 { 421 } 422 #endif 423 424 struct nsim_bus_dev { 425 struct device dev; 426 struct list_head list; 427 unsigned int port_count; 428 unsigned int num_queues; /* Number of queues for each port on this bus */ 429 struct net *initial_net; /* Purpose of this is to carry net pointer 430 * during the probe time only. 431 */ 432 unsigned int max_vfs; 433 unsigned int num_vfs; 434 bool init; 435 }; 436 437 int nsim_bus_init(void); 438 void nsim_bus_exit(void); 439