1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips 4 * Copyright (c) 2008-2009 Marvell Semiconductor 5 */ 6 7 #ifndef __LINUX_NET_DSA_H 8 #define __LINUX_NET_DSA_H 9 10 #include <linux/if.h> 11 #include <linux/if_ether.h> 12 #include <linux/list.h> 13 #include <linux/notifier.h> 14 #include <linux/timer.h> 15 #include <linux/workqueue.h> 16 #include <linux/of.h> 17 #include <linux/ethtool.h> 18 #include <linux/net_tstamp.h> 19 #include <linux/phy.h> 20 #include <linux/platform_data/dsa.h> 21 #include <linux/phylink.h> 22 #include <net/devlink.h> 23 #include <net/switchdev.h> 24 25 struct tc_action; 26 struct phy_device; 27 struct fixed_phy_status; 28 struct phylink_link_state; 29 30 #define DSA_TAG_PROTO_NONE_VALUE 0 31 #define DSA_TAG_PROTO_BRCM_VALUE 1 32 #define DSA_TAG_PROTO_BRCM_PREPEND_VALUE 2 33 #define DSA_TAG_PROTO_DSA_VALUE 3 34 #define DSA_TAG_PROTO_EDSA_VALUE 4 35 #define DSA_TAG_PROTO_GSWIP_VALUE 5 36 #define DSA_TAG_PROTO_KSZ9477_VALUE 6 37 #define DSA_TAG_PROTO_KSZ9893_VALUE 7 38 #define DSA_TAG_PROTO_LAN9303_VALUE 8 39 #define DSA_TAG_PROTO_MTK_VALUE 9 40 #define DSA_TAG_PROTO_QCA_VALUE 10 41 #define DSA_TAG_PROTO_TRAILER_VALUE 11 42 #define DSA_TAG_PROTO_8021Q_VALUE 12 43 #define DSA_TAG_PROTO_SJA1105_VALUE 13 44 #define DSA_TAG_PROTO_KSZ8795_VALUE 14 45 #define DSA_TAG_PROTO_OCELOT_VALUE 15 46 #define DSA_TAG_PROTO_AR9331_VALUE 16 47 48 enum dsa_tag_protocol { 49 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, 50 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, 51 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, 52 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, 53 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, 54 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE, 55 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE, 56 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, 57 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, 58 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, 59 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, 60 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, 61 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, 62 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE, 63 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE, 64 DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE, 65 DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_VALUE, 66 }; 67 68 struct packet_type; 69 struct dsa_switch; 70 71 struct dsa_device_ops { 72 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev); 73 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 74 struct packet_type *pt); 75 int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto, 76 int *offset); 77 /* Used to determine which traffic should match the DSA filter in 78 * eth_type_trans, and which, if any, should bypass it and be processed 79 * as regular on the master net device. 80 */ 81 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 82 unsigned int overhead; 83 const char *name; 84 enum dsa_tag_protocol proto; 85 }; 86 87 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-" 88 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \ 89 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE)) 90 91 struct dsa_skb_cb { 92 struct sk_buff *clone; 93 }; 94 95 struct __dsa_skb_cb { 96 struct dsa_skb_cb cb; 97 u8 priv[48 - sizeof(struct dsa_skb_cb)]; 98 }; 99 100 #define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb)) 101 102 #define DSA_SKB_CB_PRIV(skb) \ 103 ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv)) 104 105 struct dsa_switch_tree { 106 struct list_head list; 107 108 /* Notifier chain for switch-wide events */ 109 struct raw_notifier_head nh; 110 111 /* Tree identifier */ 112 unsigned int index; 113 114 /* Number of switches attached to this tree */ 115 struct kref refcount; 116 117 /* Has this tree been applied to the hardware? */ 118 bool setup; 119 120 /* 121 * Configuration data for the platform device that owns 122 * this dsa switch tree instance. 123 */ 124 struct dsa_platform_data *pd; 125 126 /* List of switch ports */ 127 struct list_head ports; 128 129 /* List of DSA links composing the routing table */ 130 struct list_head rtable; 131 }; 132 133 /* TC matchall action types, only mirroring for now */ 134 enum dsa_port_mall_action_type { 135 DSA_PORT_MALL_MIRROR, 136 }; 137 138 /* TC mirroring entry */ 139 struct dsa_mall_mirror_tc_entry { 140 u8 to_local_port; 141 bool ingress; 142 }; 143 144 /* TC matchall entry */ 145 struct dsa_mall_tc_entry { 146 struct list_head list; 147 unsigned long cookie; 148 enum dsa_port_mall_action_type type; 149 union { 150 struct dsa_mall_mirror_tc_entry mirror; 151 }; 152 }; 153 154 155 struct dsa_port { 156 /* A CPU port is physically connected to a master device. 157 * A user port exposed to userspace has a slave device. 158 */ 159 union { 160 struct net_device *master; 161 struct net_device *slave; 162 }; 163 164 /* CPU port tagging operations used by master or slave devices */ 165 const struct dsa_device_ops *tag_ops; 166 167 /* Copies for faster access in master receive hot path */ 168 struct dsa_switch_tree *dst; 169 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 170 struct packet_type *pt); 171 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 172 173 enum { 174 DSA_PORT_TYPE_UNUSED = 0, 175 DSA_PORT_TYPE_CPU, 176 DSA_PORT_TYPE_DSA, 177 DSA_PORT_TYPE_USER, 178 } type; 179 180 struct dsa_switch *ds; 181 unsigned int index; 182 const char *name; 183 struct dsa_port *cpu_dp; 184 const char *mac; 185 struct device_node *dn; 186 unsigned int ageing_time; 187 bool vlan_filtering; 188 u8 stp_state; 189 struct net_device *bridge_dev; 190 struct devlink_port devlink_port; 191 struct phylink *pl; 192 struct phylink_config pl_config; 193 194 struct list_head list; 195 196 /* 197 * Give the switch driver somewhere to hang its per-port private data 198 * structures (accessible from the tagger). 199 */ 200 void *priv; 201 202 /* 203 * Original copy of the master netdev ethtool_ops 204 */ 205 const struct ethtool_ops *orig_ethtool_ops; 206 207 /* 208 * Original copy of the master netdev net_device_ops 209 */ 210 const struct net_device_ops *orig_ndo_ops; 211 212 bool setup; 213 }; 214 215 /* TODO: ideally DSA ports would have a single dp->link_dp member, 216 * and no dst->rtable nor this struct dsa_link would be needed, 217 * but this would require some more complex tree walking, 218 * so keep it stupid at the moment and list them all. 219 */ 220 struct dsa_link { 221 struct dsa_port *dp; 222 struct dsa_port *link_dp; 223 struct list_head list; 224 }; 225 226 struct dsa_switch { 227 bool setup; 228 229 struct device *dev; 230 231 /* 232 * Parent switch tree, and switch index. 233 */ 234 struct dsa_switch_tree *dst; 235 unsigned int index; 236 237 /* Listener for switch fabric events */ 238 struct notifier_block nb; 239 240 /* 241 * Give the switch driver somewhere to hang its private data 242 * structure. 243 */ 244 void *priv; 245 246 /* 247 * Configuration data for this switch. 248 */ 249 struct dsa_chip_data *cd; 250 251 /* 252 * The switch operations. 253 */ 254 const struct dsa_switch_ops *ops; 255 256 /* 257 * Slave mii_bus and devices for the individual ports. 258 */ 259 u32 phys_mii_mask; 260 struct mii_bus *slave_mii_bus; 261 262 /* Ageing Time limits in msecs */ 263 unsigned int ageing_time_min; 264 unsigned int ageing_time_max; 265 266 /* devlink used to represent this switch device */ 267 struct devlink *devlink; 268 269 /* Number of switch port queues */ 270 unsigned int num_tx_queues; 271 272 /* Disallow bridge core from requesting different VLAN awareness 273 * settings on ports if not hardware-supported 274 */ 275 bool vlan_filtering_is_global; 276 277 /* In case vlan_filtering_is_global is set, the VLAN awareness state 278 * should be retrieved from here and not from the per-port settings. 279 */ 280 bool vlan_filtering; 281 282 /* MAC PCS does not provide link state change interrupt, and requires 283 * polling. Flag passed on to PHYLINK. 284 */ 285 bool pcs_poll; 286 287 size_t num_ports; 288 }; 289 290 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 291 { 292 struct dsa_switch_tree *dst = ds->dst; 293 struct dsa_port *dp; 294 295 list_for_each_entry(dp, &dst->ports, list) 296 if (dp->ds == ds && dp->index == p) 297 return dp; 298 299 return NULL; 300 } 301 302 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 303 { 304 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 305 } 306 307 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 308 { 309 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 310 } 311 312 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 313 { 314 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 315 } 316 317 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 318 { 319 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 320 } 321 322 static inline u32 dsa_user_ports(struct dsa_switch *ds) 323 { 324 u32 mask = 0; 325 int p; 326 327 for (p = 0; p < ds->num_ports; p++) 328 if (dsa_is_user_port(ds, p)) 329 mask |= BIT(p); 330 331 return mask; 332 } 333 334 /* Return the local port used to reach an arbitrary switch device */ 335 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device) 336 { 337 struct dsa_switch_tree *dst = ds->dst; 338 struct dsa_link *dl; 339 340 list_for_each_entry(dl, &dst->rtable, list) 341 if (dl->dp->ds == ds && dl->link_dp->ds->index == device) 342 return dl->dp->index; 343 344 return ds->num_ports; 345 } 346 347 /* Return the local port used to reach an arbitrary switch port */ 348 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 349 int port) 350 { 351 if (device == ds->index) 352 return port; 353 else 354 return dsa_routing_port(ds, device); 355 } 356 357 /* Return the local port used to reach the dedicated CPU port */ 358 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 359 { 360 const struct dsa_port *dp = dsa_to_port(ds, port); 361 const struct dsa_port *cpu_dp = dp->cpu_dp; 362 363 if (!cpu_dp) 364 return port; 365 366 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 367 } 368 369 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 370 { 371 const struct dsa_switch *ds = dp->ds; 372 373 if (ds->vlan_filtering_is_global) 374 return ds->vlan_filtering; 375 else 376 return dp->vlan_filtering; 377 } 378 379 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 380 bool is_static, void *data); 381 struct dsa_switch_ops { 382 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 383 int port); 384 385 int (*setup)(struct dsa_switch *ds); 386 void (*teardown)(struct dsa_switch *ds); 387 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 388 389 /* 390 * Access to the switch's PHY registers. 391 */ 392 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 393 int (*phy_write)(struct dsa_switch *ds, int port, 394 int regnum, u16 val); 395 396 /* 397 * Link state adjustment (called from libphy) 398 */ 399 void (*adjust_link)(struct dsa_switch *ds, int port, 400 struct phy_device *phydev); 401 void (*fixed_link_update)(struct dsa_switch *ds, int port, 402 struct fixed_phy_status *st); 403 404 /* 405 * PHYLINK integration 406 */ 407 void (*phylink_validate)(struct dsa_switch *ds, int port, 408 unsigned long *supported, 409 struct phylink_link_state *state); 410 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 411 struct phylink_link_state *state); 412 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 413 unsigned int mode, 414 const struct phylink_link_state *state); 415 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 416 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 417 unsigned int mode, 418 phy_interface_t interface); 419 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 420 unsigned int mode, 421 phy_interface_t interface, 422 struct phy_device *phydev); 423 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 424 struct phylink_link_state *state); 425 /* 426 * ethtool hardware statistics. 427 */ 428 void (*get_strings)(struct dsa_switch *ds, int port, 429 u32 stringset, uint8_t *data); 430 void (*get_ethtool_stats)(struct dsa_switch *ds, 431 int port, uint64_t *data); 432 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 433 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 434 int port, uint64_t *data); 435 436 /* 437 * ethtool Wake-on-LAN 438 */ 439 void (*get_wol)(struct dsa_switch *ds, int port, 440 struct ethtool_wolinfo *w); 441 int (*set_wol)(struct dsa_switch *ds, int port, 442 struct ethtool_wolinfo *w); 443 444 /* 445 * ethtool timestamp info 446 */ 447 int (*get_ts_info)(struct dsa_switch *ds, int port, 448 struct ethtool_ts_info *ts); 449 450 /* 451 * Suspend and resume 452 */ 453 int (*suspend)(struct dsa_switch *ds); 454 int (*resume)(struct dsa_switch *ds); 455 456 /* 457 * Port enable/disable 458 */ 459 int (*port_enable)(struct dsa_switch *ds, int port, 460 struct phy_device *phy); 461 void (*port_disable)(struct dsa_switch *ds, int port); 462 463 /* 464 * Port's MAC EEE settings 465 */ 466 int (*set_mac_eee)(struct dsa_switch *ds, int port, 467 struct ethtool_eee *e); 468 int (*get_mac_eee)(struct dsa_switch *ds, int port, 469 struct ethtool_eee *e); 470 471 /* EEPROM access */ 472 int (*get_eeprom_len)(struct dsa_switch *ds); 473 int (*get_eeprom)(struct dsa_switch *ds, 474 struct ethtool_eeprom *eeprom, u8 *data); 475 int (*set_eeprom)(struct dsa_switch *ds, 476 struct ethtool_eeprom *eeprom, u8 *data); 477 478 /* 479 * Register access. 480 */ 481 int (*get_regs_len)(struct dsa_switch *ds, int port); 482 void (*get_regs)(struct dsa_switch *ds, int port, 483 struct ethtool_regs *regs, void *p); 484 485 /* 486 * Bridge integration 487 */ 488 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 489 int (*port_bridge_join)(struct dsa_switch *ds, int port, 490 struct net_device *bridge); 491 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 492 struct net_device *bridge); 493 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 494 u8 state); 495 void (*port_fast_age)(struct dsa_switch *ds, int port); 496 int (*port_egress_floods)(struct dsa_switch *ds, int port, 497 bool unicast, bool multicast); 498 499 /* 500 * VLAN support 501 */ 502 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 503 bool vlan_filtering); 504 int (*port_vlan_prepare)(struct dsa_switch *ds, int port, 505 const struct switchdev_obj_port_vlan *vlan); 506 void (*port_vlan_add)(struct dsa_switch *ds, int port, 507 const struct switchdev_obj_port_vlan *vlan); 508 int (*port_vlan_del)(struct dsa_switch *ds, int port, 509 const struct switchdev_obj_port_vlan *vlan); 510 /* 511 * Forwarding database 512 */ 513 int (*port_fdb_add)(struct dsa_switch *ds, int port, 514 const unsigned char *addr, u16 vid); 515 int (*port_fdb_del)(struct dsa_switch *ds, int port, 516 const unsigned char *addr, u16 vid); 517 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 518 dsa_fdb_dump_cb_t *cb, void *data); 519 520 /* 521 * Multicast database 522 */ 523 int (*port_mdb_prepare)(struct dsa_switch *ds, int port, 524 const struct switchdev_obj_port_mdb *mdb); 525 void (*port_mdb_add)(struct dsa_switch *ds, int port, 526 const struct switchdev_obj_port_mdb *mdb); 527 int (*port_mdb_del)(struct dsa_switch *ds, int port, 528 const struct switchdev_obj_port_mdb *mdb); 529 /* 530 * RXNFC 531 */ 532 int (*get_rxnfc)(struct dsa_switch *ds, int port, 533 struct ethtool_rxnfc *nfc, u32 *rule_locs); 534 int (*set_rxnfc)(struct dsa_switch *ds, int port, 535 struct ethtool_rxnfc *nfc); 536 537 /* 538 * TC integration 539 */ 540 int (*port_mirror_add)(struct dsa_switch *ds, int port, 541 struct dsa_mall_mirror_tc_entry *mirror, 542 bool ingress); 543 void (*port_mirror_del)(struct dsa_switch *ds, int port, 544 struct dsa_mall_mirror_tc_entry *mirror); 545 int (*port_setup_tc)(struct dsa_switch *ds, int port, 546 enum tc_setup_type type, void *type_data); 547 548 /* 549 * Cross-chip operations 550 */ 551 int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index, 552 int port, struct net_device *br); 553 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index, 554 int port, struct net_device *br); 555 556 /* 557 * PTP functionality 558 */ 559 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 560 struct ifreq *ifr); 561 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 562 struct ifreq *ifr); 563 bool (*port_txtstamp)(struct dsa_switch *ds, int port, 564 struct sk_buff *clone, unsigned int type); 565 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 566 struct sk_buff *skb, unsigned int type); 567 568 /* Devlink parameters */ 569 int (*devlink_param_get)(struct dsa_switch *ds, u32 id, 570 struct devlink_param_gset_ctx *ctx); 571 int (*devlink_param_set)(struct dsa_switch *ds, u32 id, 572 struct devlink_param_gset_ctx *ctx); 573 }; 574 575 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \ 576 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \ 577 dsa_devlink_param_get, dsa_devlink_param_set, NULL) 578 579 int dsa_devlink_param_get(struct devlink *dl, u32 id, 580 struct devlink_param_gset_ctx *ctx); 581 int dsa_devlink_param_set(struct devlink *dl, u32 id, 582 struct devlink_param_gset_ctx *ctx); 583 int dsa_devlink_params_register(struct dsa_switch *ds, 584 const struct devlink_param *params, 585 size_t params_count); 586 void dsa_devlink_params_unregister(struct dsa_switch *ds, 587 const struct devlink_param *params, 588 size_t params_count); 589 int dsa_devlink_resource_register(struct dsa_switch *ds, 590 const char *resource_name, 591 u64 resource_size, 592 u64 resource_id, 593 u64 parent_resource_id, 594 const struct devlink_resource_size_params *size_params); 595 596 void dsa_devlink_resources_unregister(struct dsa_switch *ds); 597 598 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds, 599 u64 resource_id, 600 devlink_resource_occ_get_t *occ_get, 601 void *occ_get_priv); 602 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds, 603 u64 resource_id); 604 605 struct dsa_devlink_priv { 606 struct dsa_switch *ds; 607 }; 608 609 struct dsa_switch_driver { 610 struct list_head list; 611 const struct dsa_switch_ops *ops; 612 }; 613 614 struct net_device *dsa_dev_to_net_device(struct device *dev); 615 616 /* Keep inline for faster access in hot path */ 617 static inline bool netdev_uses_dsa(struct net_device *dev) 618 { 619 #if IS_ENABLED(CONFIG_NET_DSA) 620 return dev->dsa_ptr && dev->dsa_ptr->rcv; 621 #endif 622 return false; 623 } 624 625 static inline bool dsa_can_decode(const struct sk_buff *skb, 626 struct net_device *dev) 627 { 628 #if IS_ENABLED(CONFIG_NET_DSA) 629 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev); 630 #endif 631 return false; 632 } 633 634 void dsa_unregister_switch(struct dsa_switch *ds); 635 int dsa_register_switch(struct dsa_switch *ds); 636 #ifdef CONFIG_PM_SLEEP 637 int dsa_switch_suspend(struct dsa_switch *ds); 638 int dsa_switch_resume(struct dsa_switch *ds); 639 #else 640 static inline int dsa_switch_suspend(struct dsa_switch *ds) 641 { 642 return 0; 643 } 644 static inline int dsa_switch_resume(struct dsa_switch *ds) 645 { 646 return 0; 647 } 648 #endif /* CONFIG_PM_SLEEP */ 649 650 enum dsa_notifier_type { 651 DSA_PORT_REGISTER, 652 DSA_PORT_UNREGISTER, 653 }; 654 655 struct dsa_notifier_info { 656 struct net_device *dev; 657 }; 658 659 struct dsa_notifier_register_info { 660 struct dsa_notifier_info info; /* must be first */ 661 struct net_device *master; 662 unsigned int port_number; 663 unsigned int switch_number; 664 }; 665 666 static inline struct net_device * 667 dsa_notifier_info_to_dev(const struct dsa_notifier_info *info) 668 { 669 return info->dev; 670 } 671 672 #if IS_ENABLED(CONFIG_NET_DSA) 673 int register_dsa_notifier(struct notifier_block *nb); 674 int unregister_dsa_notifier(struct notifier_block *nb); 675 int call_dsa_notifiers(unsigned long val, struct net_device *dev, 676 struct dsa_notifier_info *info); 677 #else 678 static inline int register_dsa_notifier(struct notifier_block *nb) 679 { 680 return 0; 681 } 682 683 static inline int unregister_dsa_notifier(struct notifier_block *nb) 684 { 685 return 0; 686 } 687 688 static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev, 689 struct dsa_notifier_info *info) 690 { 691 return NOTIFY_DONE; 692 } 693 #endif 694 695 /* Broadcom tag specific helpers to insert and extract queue/port number */ 696 #define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q) 697 #define BRCM_TAG_GET_PORT(v) ((v) >> 8) 698 #define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff) 699 700 701 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 702 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data); 703 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data); 704 int dsa_port_get_phy_sset_count(struct dsa_port *dp); 705 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 706 707 struct dsa_tag_driver { 708 const struct dsa_device_ops *ops; 709 struct list_head list; 710 struct module *owner; 711 }; 712 713 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 714 unsigned int count, 715 struct module *owner); 716 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 717 unsigned int count); 718 719 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 720 static int __init dsa_tag_driver_module_init(void) \ 721 { \ 722 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 723 THIS_MODULE); \ 724 return 0; \ 725 } \ 726 module_init(dsa_tag_driver_module_init); \ 727 \ 728 static void __exit dsa_tag_driver_module_exit(void) \ 729 { \ 730 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 731 } \ 732 module_exit(dsa_tag_driver_module_exit) 733 734 /** 735 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 736 * drivers 737 * @__ops_array: Array of tag driver strucutres 738 * 739 * Helper macro for DSA tag drivers which do not do anything special 740 * in module init/exit. Each module may only use this macro once, and 741 * calling it replaces module_init() and module_exit(). 742 */ 743 #define module_dsa_tag_drivers(__ops_array) \ 744 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 745 746 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 747 748 /* Create a static structure we can build a linked list of dsa_tag 749 * drivers 750 */ 751 #define DSA_TAG_DRIVER(__ops) \ 752 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 753 .ops = &__ops, \ 754 } 755 756 /** 757 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 758 * driver 759 * @__ops: Single tag driver structures 760 * 761 * Helper macro for DSA tag drivers which do not do anything special 762 * in module init/exit. Each module may only use this macro once, and 763 * calling it replaces module_init() and module_exit(). 764 */ 765 #define module_dsa_tag_driver(__ops) \ 766 DSA_TAG_DRIVER(__ops); \ 767 \ 768 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 769 &DSA_TAG_DRIVER_NAME(__ops) \ 770 }; \ 771 module_dsa_tag_drivers(dsa_tag_driver_array) 772 #endif 773 774