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