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 46 enum dsa_tag_protocol { 47 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, 48 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, 49 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, 50 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, 51 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, 52 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE, 53 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE, 54 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, 55 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, 56 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, 57 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, 58 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, 59 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, 60 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE, 61 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE, 62 }; 63 64 struct packet_type; 65 struct dsa_switch; 66 67 struct dsa_device_ops { 68 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev); 69 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 70 struct packet_type *pt); 71 int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto, 72 int *offset); 73 /* Used to determine which traffic should match the DSA filter in 74 * eth_type_trans, and which, if any, should bypass it and be processed 75 * as regular on the master net device. 76 */ 77 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 78 unsigned int overhead; 79 const char *name; 80 enum dsa_tag_protocol proto; 81 }; 82 83 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-" 84 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \ 85 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE)) 86 87 struct dsa_skb_cb { 88 struct sk_buff *clone; 89 bool deferred_xmit; 90 }; 91 92 struct __dsa_skb_cb { 93 struct dsa_skb_cb cb; 94 u8 priv[48 - sizeof(struct dsa_skb_cb)]; 95 }; 96 97 #define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb)) 98 99 #define DSA_SKB_CB_PRIV(skb) \ 100 ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv)) 101 102 struct dsa_switch_tree { 103 struct list_head list; 104 105 /* Notifier chain for switch-wide events */ 106 struct raw_notifier_head nh; 107 108 /* Tree identifier */ 109 unsigned int index; 110 111 /* Number of switches attached to this tree */ 112 struct kref refcount; 113 114 /* Has this tree been applied to the hardware? */ 115 bool setup; 116 117 /* 118 * Configuration data for the platform device that owns 119 * this dsa switch tree instance. 120 */ 121 struct dsa_platform_data *pd; 122 123 /* List of switch ports */ 124 struct list_head ports; 125 126 /* List of DSA links composing the routing table */ 127 struct list_head rtable; 128 }; 129 130 /* TC matchall action types, only mirroring for now */ 131 enum dsa_port_mall_action_type { 132 DSA_PORT_MALL_MIRROR, 133 }; 134 135 /* TC mirroring entry */ 136 struct dsa_mall_mirror_tc_entry { 137 u8 to_local_port; 138 bool ingress; 139 }; 140 141 /* TC matchall entry */ 142 struct dsa_mall_tc_entry { 143 struct list_head list; 144 unsigned long cookie; 145 enum dsa_port_mall_action_type type; 146 union { 147 struct dsa_mall_mirror_tc_entry mirror; 148 }; 149 }; 150 151 152 struct dsa_port { 153 /* A CPU port is physically connected to a master device. 154 * A user port exposed to userspace has a slave device. 155 */ 156 union { 157 struct net_device *master; 158 struct net_device *slave; 159 }; 160 161 /* CPU port tagging operations used by master or slave devices */ 162 const struct dsa_device_ops *tag_ops; 163 164 /* Copies for faster access in master receive hot path */ 165 struct dsa_switch_tree *dst; 166 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 167 struct packet_type *pt); 168 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 169 170 enum { 171 DSA_PORT_TYPE_UNUSED = 0, 172 DSA_PORT_TYPE_CPU, 173 DSA_PORT_TYPE_DSA, 174 DSA_PORT_TYPE_USER, 175 } type; 176 177 struct dsa_switch *ds; 178 unsigned int index; 179 const char *name; 180 struct dsa_port *cpu_dp; 181 const char *mac; 182 struct device_node *dn; 183 unsigned int ageing_time; 184 bool vlan_filtering; 185 u8 stp_state; 186 struct net_device *bridge_dev; 187 struct devlink_port devlink_port; 188 struct phylink *pl; 189 struct phylink_config pl_config; 190 191 struct work_struct xmit_work; 192 struct sk_buff_head xmit_queue; 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 size_t num_ports; 283 }; 284 285 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 286 { 287 struct dsa_switch_tree *dst = ds->dst; 288 struct dsa_port *dp; 289 290 list_for_each_entry(dp, &dst->ports, list) 291 if (dp->ds == ds && dp->index == p) 292 return dp; 293 294 return NULL; 295 } 296 297 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 298 { 299 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 300 } 301 302 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 303 { 304 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 305 } 306 307 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 308 { 309 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 310 } 311 312 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 313 { 314 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 315 } 316 317 static inline u32 dsa_user_ports(struct dsa_switch *ds) 318 { 319 u32 mask = 0; 320 int p; 321 322 for (p = 0; p < ds->num_ports; p++) 323 if (dsa_is_user_port(ds, p)) 324 mask |= BIT(p); 325 326 return mask; 327 } 328 329 /* Return the local port used to reach an arbitrary switch device */ 330 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device) 331 { 332 struct dsa_switch_tree *dst = ds->dst; 333 struct dsa_link *dl; 334 335 list_for_each_entry(dl, &dst->rtable, list) 336 if (dl->dp->ds == ds && dl->link_dp->ds->index == device) 337 return dl->dp->index; 338 339 return ds->num_ports; 340 } 341 342 /* Return the local port used to reach an arbitrary switch port */ 343 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 344 int port) 345 { 346 if (device == ds->index) 347 return port; 348 else 349 return dsa_routing_port(ds, device); 350 } 351 352 /* Return the local port used to reach the dedicated CPU port */ 353 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 354 { 355 const struct dsa_port *dp = dsa_to_port(ds, port); 356 const struct dsa_port *cpu_dp = dp->cpu_dp; 357 358 if (!cpu_dp) 359 return port; 360 361 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 362 } 363 364 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 365 { 366 const struct dsa_switch *ds = dp->ds; 367 368 if (ds->vlan_filtering_is_global) 369 return ds->vlan_filtering; 370 else 371 return dp->vlan_filtering; 372 } 373 374 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 375 bool is_static, void *data); 376 struct dsa_switch_ops { 377 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 378 int port); 379 380 int (*setup)(struct dsa_switch *ds); 381 void (*teardown)(struct dsa_switch *ds); 382 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 383 384 /* 385 * Access to the switch's PHY registers. 386 */ 387 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 388 int (*phy_write)(struct dsa_switch *ds, int port, 389 int regnum, u16 val); 390 391 /* 392 * Link state adjustment (called from libphy) 393 */ 394 void (*adjust_link)(struct dsa_switch *ds, int port, 395 struct phy_device *phydev); 396 void (*fixed_link_update)(struct dsa_switch *ds, int port, 397 struct fixed_phy_status *st); 398 399 /* 400 * PHYLINK integration 401 */ 402 void (*phylink_validate)(struct dsa_switch *ds, int port, 403 unsigned long *supported, 404 struct phylink_link_state *state); 405 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 406 struct phylink_link_state *state); 407 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 408 unsigned int mode, 409 const struct phylink_link_state *state); 410 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 411 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 412 unsigned int mode, 413 phy_interface_t interface); 414 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 415 unsigned int mode, 416 phy_interface_t interface, 417 struct phy_device *phydev); 418 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 419 struct phylink_link_state *state); 420 /* 421 * ethtool hardware statistics. 422 */ 423 void (*get_strings)(struct dsa_switch *ds, int port, 424 u32 stringset, uint8_t *data); 425 void (*get_ethtool_stats)(struct dsa_switch *ds, 426 int port, uint64_t *data); 427 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 428 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 429 int port, uint64_t *data); 430 431 /* 432 * ethtool Wake-on-LAN 433 */ 434 void (*get_wol)(struct dsa_switch *ds, int port, 435 struct ethtool_wolinfo *w); 436 int (*set_wol)(struct dsa_switch *ds, int port, 437 struct ethtool_wolinfo *w); 438 439 /* 440 * ethtool timestamp info 441 */ 442 int (*get_ts_info)(struct dsa_switch *ds, int port, 443 struct ethtool_ts_info *ts); 444 445 /* 446 * Suspend and resume 447 */ 448 int (*suspend)(struct dsa_switch *ds); 449 int (*resume)(struct dsa_switch *ds); 450 451 /* 452 * Port enable/disable 453 */ 454 int (*port_enable)(struct dsa_switch *ds, int port, 455 struct phy_device *phy); 456 void (*port_disable)(struct dsa_switch *ds, int port); 457 458 /* 459 * Port's MAC EEE settings 460 */ 461 int (*set_mac_eee)(struct dsa_switch *ds, int port, 462 struct ethtool_eee *e); 463 int (*get_mac_eee)(struct dsa_switch *ds, int port, 464 struct ethtool_eee *e); 465 466 /* EEPROM access */ 467 int (*get_eeprom_len)(struct dsa_switch *ds); 468 int (*get_eeprom)(struct dsa_switch *ds, 469 struct ethtool_eeprom *eeprom, u8 *data); 470 int (*set_eeprom)(struct dsa_switch *ds, 471 struct ethtool_eeprom *eeprom, u8 *data); 472 473 /* 474 * Register access. 475 */ 476 int (*get_regs_len)(struct dsa_switch *ds, int port); 477 void (*get_regs)(struct dsa_switch *ds, int port, 478 struct ethtool_regs *regs, void *p); 479 480 /* 481 * Bridge integration 482 */ 483 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 484 int (*port_bridge_join)(struct dsa_switch *ds, int port, 485 struct net_device *bridge); 486 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 487 struct net_device *bridge); 488 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 489 u8 state); 490 void (*port_fast_age)(struct dsa_switch *ds, int port); 491 int (*port_egress_floods)(struct dsa_switch *ds, int port, 492 bool unicast, bool multicast); 493 494 /* 495 * VLAN support 496 */ 497 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 498 bool vlan_filtering); 499 int (*port_vlan_prepare)(struct dsa_switch *ds, int port, 500 const struct switchdev_obj_port_vlan *vlan); 501 void (*port_vlan_add)(struct dsa_switch *ds, int port, 502 const struct switchdev_obj_port_vlan *vlan); 503 int (*port_vlan_del)(struct dsa_switch *ds, int port, 504 const struct switchdev_obj_port_vlan *vlan); 505 /* 506 * Forwarding database 507 */ 508 int (*port_fdb_add)(struct dsa_switch *ds, int port, 509 const unsigned char *addr, u16 vid); 510 int (*port_fdb_del)(struct dsa_switch *ds, int port, 511 const unsigned char *addr, u16 vid); 512 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 513 dsa_fdb_dump_cb_t *cb, void *data); 514 515 /* 516 * Multicast database 517 */ 518 int (*port_mdb_prepare)(struct dsa_switch *ds, int port, 519 const struct switchdev_obj_port_mdb *mdb); 520 void (*port_mdb_add)(struct dsa_switch *ds, int port, 521 const struct switchdev_obj_port_mdb *mdb); 522 int (*port_mdb_del)(struct dsa_switch *ds, int port, 523 const struct switchdev_obj_port_mdb *mdb); 524 /* 525 * RXNFC 526 */ 527 int (*get_rxnfc)(struct dsa_switch *ds, int port, 528 struct ethtool_rxnfc *nfc, u32 *rule_locs); 529 int (*set_rxnfc)(struct dsa_switch *ds, int port, 530 struct ethtool_rxnfc *nfc); 531 532 /* 533 * TC integration 534 */ 535 int (*port_mirror_add)(struct dsa_switch *ds, int port, 536 struct dsa_mall_mirror_tc_entry *mirror, 537 bool ingress); 538 void (*port_mirror_del)(struct dsa_switch *ds, int port, 539 struct dsa_mall_mirror_tc_entry *mirror); 540 int (*port_setup_tc)(struct dsa_switch *ds, int port, 541 enum tc_setup_type type, void *type_data); 542 543 /* 544 * Cross-chip operations 545 */ 546 int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index, 547 int port, struct net_device *br); 548 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index, 549 int port, struct net_device *br); 550 551 /* 552 * PTP functionality 553 */ 554 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 555 struct ifreq *ifr); 556 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 557 struct ifreq *ifr); 558 bool (*port_txtstamp)(struct dsa_switch *ds, int port, 559 struct sk_buff *clone, unsigned int type); 560 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 561 struct sk_buff *skb, unsigned int type); 562 563 /* 564 * Deferred frame Tx 565 */ 566 netdev_tx_t (*port_deferred_xmit)(struct dsa_switch *ds, int port, 567 struct sk_buff *skb); 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