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 */ 134 enum dsa_port_mall_action_type { 135 DSA_PORT_MALL_MIRROR, 136 DSA_PORT_MALL_POLICER, 137 }; 138 139 /* TC mirroring entry */ 140 struct dsa_mall_mirror_tc_entry { 141 u8 to_local_port; 142 bool ingress; 143 }; 144 145 /* TC port policer entry */ 146 struct dsa_mall_policer_tc_entry { 147 s64 burst; 148 u64 rate_bytes_per_sec; 149 }; 150 151 /* TC matchall entry */ 152 struct dsa_mall_tc_entry { 153 struct list_head list; 154 unsigned long cookie; 155 enum dsa_port_mall_action_type type; 156 union { 157 struct dsa_mall_mirror_tc_entry mirror; 158 struct dsa_mall_policer_tc_entry policer; 159 }; 160 }; 161 162 163 struct dsa_port { 164 /* A CPU port is physically connected to a master device. 165 * A user port exposed to userspace has a slave device. 166 */ 167 union { 168 struct net_device *master; 169 struct net_device *slave; 170 }; 171 172 /* CPU port tagging operations used by master or slave devices */ 173 const struct dsa_device_ops *tag_ops; 174 175 /* Copies for faster access in master receive hot path */ 176 struct dsa_switch_tree *dst; 177 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 178 struct packet_type *pt); 179 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 180 181 enum { 182 DSA_PORT_TYPE_UNUSED = 0, 183 DSA_PORT_TYPE_CPU, 184 DSA_PORT_TYPE_DSA, 185 DSA_PORT_TYPE_USER, 186 } type; 187 188 struct dsa_switch *ds; 189 unsigned int index; 190 const char *name; 191 struct dsa_port *cpu_dp; 192 const char *mac; 193 struct device_node *dn; 194 unsigned int ageing_time; 195 bool vlan_filtering; 196 u8 stp_state; 197 struct net_device *bridge_dev; 198 struct devlink_port devlink_port; 199 struct phylink *pl; 200 struct phylink_config pl_config; 201 202 struct list_head list; 203 204 /* 205 * Give the switch driver somewhere to hang its per-port private data 206 * structures (accessible from the tagger). 207 */ 208 void *priv; 209 210 /* 211 * Original copy of the master netdev ethtool_ops 212 */ 213 const struct ethtool_ops *orig_ethtool_ops; 214 215 /* 216 * Original copy of the master netdev net_device_ops 217 */ 218 const struct net_device_ops *orig_ndo_ops; 219 220 bool setup; 221 }; 222 223 /* TODO: ideally DSA ports would have a single dp->link_dp member, 224 * and no dst->rtable nor this struct dsa_link would be needed, 225 * but this would require some more complex tree walking, 226 * so keep it stupid at the moment and list them all. 227 */ 228 struct dsa_link { 229 struct dsa_port *dp; 230 struct dsa_port *link_dp; 231 struct list_head list; 232 }; 233 234 struct dsa_switch { 235 bool setup; 236 237 struct device *dev; 238 239 /* 240 * Parent switch tree, and switch index. 241 */ 242 struct dsa_switch_tree *dst; 243 unsigned int index; 244 245 /* Listener for switch fabric events */ 246 struct notifier_block nb; 247 248 /* 249 * Give the switch driver somewhere to hang its private data 250 * structure. 251 */ 252 void *priv; 253 254 /* 255 * Configuration data for this switch. 256 */ 257 struct dsa_chip_data *cd; 258 259 /* 260 * The switch operations. 261 */ 262 const struct dsa_switch_ops *ops; 263 264 /* 265 * Slave mii_bus and devices for the individual ports. 266 */ 267 u32 phys_mii_mask; 268 struct mii_bus *slave_mii_bus; 269 270 /* Ageing Time limits in msecs */ 271 unsigned int ageing_time_min; 272 unsigned int ageing_time_max; 273 274 /* devlink used to represent this switch device */ 275 struct devlink *devlink; 276 277 /* Number of switch port queues */ 278 unsigned int num_tx_queues; 279 280 /* Disallow bridge core from requesting different VLAN awareness 281 * settings on ports if not hardware-supported 282 */ 283 bool vlan_filtering_is_global; 284 285 /* In case vlan_filtering_is_global is set, the VLAN awareness state 286 * should be retrieved from here and not from the per-port settings. 287 */ 288 bool vlan_filtering; 289 290 /* MAC PCS does not provide link state change interrupt, and requires 291 * polling. Flag passed on to PHYLINK. 292 */ 293 bool pcs_poll; 294 295 /* For switches that only have the MRU configurable. To ensure the 296 * configured MTU is not exceeded, normalization of MRU on all bridged 297 * interfaces is needed. 298 */ 299 bool mtu_enforcement_ingress; 300 301 size_t num_ports; 302 }; 303 304 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 305 { 306 struct dsa_switch_tree *dst = ds->dst; 307 struct dsa_port *dp; 308 309 list_for_each_entry(dp, &dst->ports, list) 310 if (dp->ds == ds && dp->index == p) 311 return dp; 312 313 return NULL; 314 } 315 316 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 317 { 318 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 319 } 320 321 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 322 { 323 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 324 } 325 326 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 327 { 328 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 329 } 330 331 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 332 { 333 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 334 } 335 336 static inline u32 dsa_user_ports(struct dsa_switch *ds) 337 { 338 u32 mask = 0; 339 int p; 340 341 for (p = 0; p < ds->num_ports; p++) 342 if (dsa_is_user_port(ds, p)) 343 mask |= BIT(p); 344 345 return mask; 346 } 347 348 /* Return the local port used to reach an arbitrary switch device */ 349 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device) 350 { 351 struct dsa_switch_tree *dst = ds->dst; 352 struct dsa_link *dl; 353 354 list_for_each_entry(dl, &dst->rtable, list) 355 if (dl->dp->ds == ds && dl->link_dp->ds->index == device) 356 return dl->dp->index; 357 358 return ds->num_ports; 359 } 360 361 /* Return the local port used to reach an arbitrary switch port */ 362 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 363 int port) 364 { 365 if (device == ds->index) 366 return port; 367 else 368 return dsa_routing_port(ds, device); 369 } 370 371 /* Return the local port used to reach the dedicated CPU port */ 372 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 373 { 374 const struct dsa_port *dp = dsa_to_port(ds, port); 375 const struct dsa_port *cpu_dp = dp->cpu_dp; 376 377 if (!cpu_dp) 378 return port; 379 380 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 381 } 382 383 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 384 { 385 const struct dsa_switch *ds = dp->ds; 386 387 if (ds->vlan_filtering_is_global) 388 return ds->vlan_filtering; 389 else 390 return dp->vlan_filtering; 391 } 392 393 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 394 bool is_static, void *data); 395 struct dsa_switch_ops { 396 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 397 int port, 398 enum dsa_tag_protocol mprot); 399 400 int (*setup)(struct dsa_switch *ds); 401 void (*teardown)(struct dsa_switch *ds); 402 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 403 404 /* 405 * Access to the switch's PHY registers. 406 */ 407 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 408 int (*phy_write)(struct dsa_switch *ds, int port, 409 int regnum, u16 val); 410 411 /* 412 * Link state adjustment (called from libphy) 413 */ 414 void (*adjust_link)(struct dsa_switch *ds, int port, 415 struct phy_device *phydev); 416 void (*fixed_link_update)(struct dsa_switch *ds, int port, 417 struct fixed_phy_status *st); 418 419 /* 420 * PHYLINK integration 421 */ 422 void (*phylink_validate)(struct dsa_switch *ds, int port, 423 unsigned long *supported, 424 struct phylink_link_state *state); 425 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 426 struct phylink_link_state *state); 427 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 428 unsigned int mode, 429 const struct phylink_link_state *state); 430 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 431 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 432 unsigned int mode, 433 phy_interface_t interface); 434 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 435 unsigned int mode, 436 phy_interface_t interface, 437 struct phy_device *phydev, 438 int speed, int duplex, 439 bool tx_pause, bool rx_pause); 440 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 441 struct phylink_link_state *state); 442 /* 443 * ethtool hardware statistics. 444 */ 445 void (*get_strings)(struct dsa_switch *ds, int port, 446 u32 stringset, uint8_t *data); 447 void (*get_ethtool_stats)(struct dsa_switch *ds, 448 int port, uint64_t *data); 449 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 450 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 451 int port, uint64_t *data); 452 453 /* 454 * ethtool Wake-on-LAN 455 */ 456 void (*get_wol)(struct dsa_switch *ds, int port, 457 struct ethtool_wolinfo *w); 458 int (*set_wol)(struct dsa_switch *ds, int port, 459 struct ethtool_wolinfo *w); 460 461 /* 462 * ethtool timestamp info 463 */ 464 int (*get_ts_info)(struct dsa_switch *ds, int port, 465 struct ethtool_ts_info *ts); 466 467 /* 468 * Suspend and resume 469 */ 470 int (*suspend)(struct dsa_switch *ds); 471 int (*resume)(struct dsa_switch *ds); 472 473 /* 474 * Port enable/disable 475 */ 476 int (*port_enable)(struct dsa_switch *ds, int port, 477 struct phy_device *phy); 478 void (*port_disable)(struct dsa_switch *ds, int port); 479 480 /* 481 * Port's MAC EEE settings 482 */ 483 int (*set_mac_eee)(struct dsa_switch *ds, int port, 484 struct ethtool_eee *e); 485 int (*get_mac_eee)(struct dsa_switch *ds, int port, 486 struct ethtool_eee *e); 487 488 /* EEPROM access */ 489 int (*get_eeprom_len)(struct dsa_switch *ds); 490 int (*get_eeprom)(struct dsa_switch *ds, 491 struct ethtool_eeprom *eeprom, u8 *data); 492 int (*set_eeprom)(struct dsa_switch *ds, 493 struct ethtool_eeprom *eeprom, u8 *data); 494 495 /* 496 * Register access. 497 */ 498 int (*get_regs_len)(struct dsa_switch *ds, int port); 499 void (*get_regs)(struct dsa_switch *ds, int port, 500 struct ethtool_regs *regs, void *p); 501 502 /* 503 * Bridge integration 504 */ 505 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 506 int (*port_bridge_join)(struct dsa_switch *ds, int port, 507 struct net_device *bridge); 508 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 509 struct net_device *bridge); 510 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 511 u8 state); 512 void (*port_fast_age)(struct dsa_switch *ds, int port); 513 int (*port_egress_floods)(struct dsa_switch *ds, int port, 514 bool unicast, bool multicast); 515 516 /* 517 * VLAN support 518 */ 519 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 520 bool vlan_filtering); 521 int (*port_vlan_prepare)(struct dsa_switch *ds, int port, 522 const struct switchdev_obj_port_vlan *vlan); 523 void (*port_vlan_add)(struct dsa_switch *ds, int port, 524 const struct switchdev_obj_port_vlan *vlan); 525 int (*port_vlan_del)(struct dsa_switch *ds, int port, 526 const struct switchdev_obj_port_vlan *vlan); 527 /* 528 * Forwarding database 529 */ 530 int (*port_fdb_add)(struct dsa_switch *ds, int port, 531 const unsigned char *addr, u16 vid); 532 int (*port_fdb_del)(struct dsa_switch *ds, int port, 533 const unsigned char *addr, u16 vid); 534 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 535 dsa_fdb_dump_cb_t *cb, void *data); 536 537 /* 538 * Multicast database 539 */ 540 int (*port_mdb_prepare)(struct dsa_switch *ds, int port, 541 const struct switchdev_obj_port_mdb *mdb); 542 void (*port_mdb_add)(struct dsa_switch *ds, int port, 543 const struct switchdev_obj_port_mdb *mdb); 544 int (*port_mdb_del)(struct dsa_switch *ds, int port, 545 const struct switchdev_obj_port_mdb *mdb); 546 /* 547 * RXNFC 548 */ 549 int (*get_rxnfc)(struct dsa_switch *ds, int port, 550 struct ethtool_rxnfc *nfc, u32 *rule_locs); 551 int (*set_rxnfc)(struct dsa_switch *ds, int port, 552 struct ethtool_rxnfc *nfc); 553 554 /* 555 * TC integration 556 */ 557 int (*cls_flower_add)(struct dsa_switch *ds, int port, 558 struct flow_cls_offload *cls, bool ingress); 559 int (*cls_flower_del)(struct dsa_switch *ds, int port, 560 struct flow_cls_offload *cls, bool ingress); 561 int (*cls_flower_stats)(struct dsa_switch *ds, int port, 562 struct flow_cls_offload *cls, bool ingress); 563 int (*port_mirror_add)(struct dsa_switch *ds, int port, 564 struct dsa_mall_mirror_tc_entry *mirror, 565 bool ingress); 566 void (*port_mirror_del)(struct dsa_switch *ds, int port, 567 struct dsa_mall_mirror_tc_entry *mirror); 568 int (*port_policer_add)(struct dsa_switch *ds, int port, 569 struct dsa_mall_policer_tc_entry *policer); 570 void (*port_policer_del)(struct dsa_switch *ds, int port); 571 int (*port_setup_tc)(struct dsa_switch *ds, int port, 572 enum tc_setup_type type, void *type_data); 573 574 /* 575 * Cross-chip operations 576 */ 577 int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index, 578 int port, struct net_device *br); 579 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index, 580 int port, struct net_device *br); 581 582 /* 583 * PTP functionality 584 */ 585 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 586 struct ifreq *ifr); 587 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 588 struct ifreq *ifr); 589 bool (*port_txtstamp)(struct dsa_switch *ds, int port, 590 struct sk_buff *clone, unsigned int type); 591 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 592 struct sk_buff *skb, unsigned int type); 593 594 /* Devlink parameters */ 595 int (*devlink_param_get)(struct dsa_switch *ds, u32 id, 596 struct devlink_param_gset_ctx *ctx); 597 int (*devlink_param_set)(struct dsa_switch *ds, u32 id, 598 struct devlink_param_gset_ctx *ctx); 599 600 /* 601 * MTU change functionality. Switches can also adjust their MRU through 602 * this method. By MTU, one understands the SDU (L2 payload) length. 603 * If the switch needs to account for the DSA tag on the CPU port, this 604 * method needs to to do so privately. 605 */ 606 int (*port_change_mtu)(struct dsa_switch *ds, int port, 607 int new_mtu); 608 int (*port_max_mtu)(struct dsa_switch *ds, int port); 609 }; 610 611 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \ 612 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \ 613 dsa_devlink_param_get, dsa_devlink_param_set, NULL) 614 615 int dsa_devlink_param_get(struct devlink *dl, u32 id, 616 struct devlink_param_gset_ctx *ctx); 617 int dsa_devlink_param_set(struct devlink *dl, u32 id, 618 struct devlink_param_gset_ctx *ctx); 619 int dsa_devlink_params_register(struct dsa_switch *ds, 620 const struct devlink_param *params, 621 size_t params_count); 622 void dsa_devlink_params_unregister(struct dsa_switch *ds, 623 const struct devlink_param *params, 624 size_t params_count); 625 int dsa_devlink_resource_register(struct dsa_switch *ds, 626 const char *resource_name, 627 u64 resource_size, 628 u64 resource_id, 629 u64 parent_resource_id, 630 const struct devlink_resource_size_params *size_params); 631 632 void dsa_devlink_resources_unregister(struct dsa_switch *ds); 633 634 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds, 635 u64 resource_id, 636 devlink_resource_occ_get_t *occ_get, 637 void *occ_get_priv); 638 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds, 639 u64 resource_id); 640 641 struct dsa_devlink_priv { 642 struct dsa_switch *ds; 643 }; 644 645 struct dsa_switch_driver { 646 struct list_head list; 647 const struct dsa_switch_ops *ops; 648 }; 649 650 struct net_device *dsa_dev_to_net_device(struct device *dev); 651 652 /* Keep inline for faster access in hot path */ 653 static inline bool netdev_uses_dsa(struct net_device *dev) 654 { 655 #if IS_ENABLED(CONFIG_NET_DSA) 656 return dev->dsa_ptr && dev->dsa_ptr->rcv; 657 #endif 658 return false; 659 } 660 661 static inline bool dsa_can_decode(const struct sk_buff *skb, 662 struct net_device *dev) 663 { 664 #if IS_ENABLED(CONFIG_NET_DSA) 665 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev); 666 #endif 667 return false; 668 } 669 670 void dsa_unregister_switch(struct dsa_switch *ds); 671 int dsa_register_switch(struct dsa_switch *ds); 672 #ifdef CONFIG_PM_SLEEP 673 int dsa_switch_suspend(struct dsa_switch *ds); 674 int dsa_switch_resume(struct dsa_switch *ds); 675 #else 676 static inline int dsa_switch_suspend(struct dsa_switch *ds) 677 { 678 return 0; 679 } 680 static inline int dsa_switch_resume(struct dsa_switch *ds) 681 { 682 return 0; 683 } 684 #endif /* CONFIG_PM_SLEEP */ 685 686 enum dsa_notifier_type { 687 DSA_PORT_REGISTER, 688 DSA_PORT_UNREGISTER, 689 }; 690 691 struct dsa_notifier_info { 692 struct net_device *dev; 693 }; 694 695 struct dsa_notifier_register_info { 696 struct dsa_notifier_info info; /* must be first */ 697 struct net_device *master; 698 unsigned int port_number; 699 unsigned int switch_number; 700 }; 701 702 static inline struct net_device * 703 dsa_notifier_info_to_dev(const struct dsa_notifier_info *info) 704 { 705 return info->dev; 706 } 707 708 #if IS_ENABLED(CONFIG_NET_DSA) 709 int register_dsa_notifier(struct notifier_block *nb); 710 int unregister_dsa_notifier(struct notifier_block *nb); 711 int call_dsa_notifiers(unsigned long val, struct net_device *dev, 712 struct dsa_notifier_info *info); 713 #else 714 static inline int register_dsa_notifier(struct notifier_block *nb) 715 { 716 return 0; 717 } 718 719 static inline int unregister_dsa_notifier(struct notifier_block *nb) 720 { 721 return 0; 722 } 723 724 static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev, 725 struct dsa_notifier_info *info) 726 { 727 return NOTIFY_DONE; 728 } 729 #endif 730 731 /* Broadcom tag specific helpers to insert and extract queue/port number */ 732 #define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q) 733 #define BRCM_TAG_GET_PORT(v) ((v) >> 8) 734 #define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff) 735 736 737 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 738 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data); 739 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data); 740 int dsa_port_get_phy_sset_count(struct dsa_port *dp); 741 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 742 743 struct dsa_tag_driver { 744 const struct dsa_device_ops *ops; 745 struct list_head list; 746 struct module *owner; 747 }; 748 749 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 750 unsigned int count, 751 struct module *owner); 752 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 753 unsigned int count); 754 755 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 756 static int __init dsa_tag_driver_module_init(void) \ 757 { \ 758 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 759 THIS_MODULE); \ 760 return 0; \ 761 } \ 762 module_init(dsa_tag_driver_module_init); \ 763 \ 764 static void __exit dsa_tag_driver_module_exit(void) \ 765 { \ 766 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 767 } \ 768 module_exit(dsa_tag_driver_module_exit) 769 770 /** 771 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 772 * drivers 773 * @__ops_array: Array of tag driver strucutres 774 * 775 * Helper macro for DSA tag drivers which do not do anything special 776 * in module init/exit. Each module may only use this macro once, and 777 * calling it replaces module_init() and module_exit(). 778 */ 779 #define module_dsa_tag_drivers(__ops_array) \ 780 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 781 782 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 783 784 /* Create a static structure we can build a linked list of dsa_tag 785 * drivers 786 */ 787 #define DSA_TAG_DRIVER(__ops) \ 788 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 789 .ops = &__ops, \ 790 } 791 792 /** 793 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 794 * driver 795 * @__ops: Single tag driver structures 796 * 797 * Helper macro for DSA tag drivers which do not do anything special 798 * in module init/exit. Each module may only use this macro once, and 799 * calling it replaces module_init() and module_exit(). 800 */ 801 #define module_dsa_tag_driver(__ops) \ 802 DSA_TAG_DRIVER(__ops); \ 803 \ 804 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 805 &DSA_TAG_DRIVER_NAME(__ops) \ 806 }; \ 807 module_dsa_tag_drivers(dsa_tag_driver_array) 808 #endif 809 810