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 #define DSA_TAG_PROTO_RTL4_A_VALUE 17 48 49 enum dsa_tag_protocol { 50 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, 51 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, 52 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, 53 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, 54 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, 55 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE, 56 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE, 57 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, 58 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, 59 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, 60 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, 61 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, 62 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, 63 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE, 64 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE, 65 DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE, 66 DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_VALUE, 67 DSA_TAG_PROTO_RTL4_A = DSA_TAG_PROTO_RTL4_A_VALUE, 68 }; 69 70 struct packet_type; 71 struct dsa_switch; 72 73 struct dsa_device_ops { 74 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev); 75 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 76 struct packet_type *pt); 77 int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto, 78 int *offset); 79 /* Used to determine which traffic should match the DSA filter in 80 * eth_type_trans, and which, if any, should bypass it and be processed 81 * as regular on the master net device. 82 */ 83 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 84 unsigned int overhead; 85 const char *name; 86 enum dsa_tag_protocol proto; 87 }; 88 89 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-" 90 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \ 91 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE)) 92 93 struct dsa_skb_cb { 94 struct sk_buff *clone; 95 }; 96 97 struct __dsa_skb_cb { 98 struct dsa_skb_cb cb; 99 u8 priv[48 - sizeof(struct dsa_skb_cb)]; 100 }; 101 102 #define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb)) 103 104 #define DSA_SKB_CB_PRIV(skb) \ 105 ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv)) 106 107 struct dsa_switch_tree { 108 struct list_head list; 109 110 /* Notifier chain for switch-wide events */ 111 struct raw_notifier_head nh; 112 113 /* Tree identifier */ 114 unsigned int index; 115 116 /* Number of switches attached to this tree */ 117 struct kref refcount; 118 119 /* Has this tree been applied to the hardware? */ 120 bool setup; 121 122 /* 123 * Configuration data for the platform device that owns 124 * this dsa switch tree instance. 125 */ 126 struct dsa_platform_data *pd; 127 128 /* List of switch ports */ 129 struct list_head ports; 130 131 /* List of DSA links composing the routing table */ 132 struct list_head rtable; 133 }; 134 135 /* TC matchall action types */ 136 enum dsa_port_mall_action_type { 137 DSA_PORT_MALL_MIRROR, 138 DSA_PORT_MALL_POLICER, 139 }; 140 141 /* TC mirroring entry */ 142 struct dsa_mall_mirror_tc_entry { 143 u8 to_local_port; 144 bool ingress; 145 }; 146 147 /* TC port policer entry */ 148 struct dsa_mall_policer_tc_entry { 149 u32 burst; 150 u64 rate_bytes_per_sec; 151 }; 152 153 /* TC matchall entry */ 154 struct dsa_mall_tc_entry { 155 struct list_head list; 156 unsigned long cookie; 157 enum dsa_port_mall_action_type type; 158 union { 159 struct dsa_mall_mirror_tc_entry mirror; 160 struct dsa_mall_policer_tc_entry policer; 161 }; 162 }; 163 164 165 struct dsa_port { 166 /* A CPU port is physically connected to a master device. 167 * A user port exposed to userspace has a slave device. 168 */ 169 union { 170 struct net_device *master; 171 struct net_device *slave; 172 }; 173 174 /* CPU port tagging operations used by master or slave devices */ 175 const struct dsa_device_ops *tag_ops; 176 177 /* Copies for faster access in master receive hot path */ 178 struct dsa_switch_tree *dst; 179 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 180 struct packet_type *pt); 181 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 182 183 enum { 184 DSA_PORT_TYPE_UNUSED = 0, 185 DSA_PORT_TYPE_CPU, 186 DSA_PORT_TYPE_DSA, 187 DSA_PORT_TYPE_USER, 188 } type; 189 190 struct dsa_switch *ds; 191 unsigned int index; 192 const char *name; 193 struct dsa_port *cpu_dp; 194 const char *mac; 195 struct device_node *dn; 196 unsigned int ageing_time; 197 bool vlan_filtering; 198 u8 stp_state; 199 struct net_device *bridge_dev; 200 struct devlink_port devlink_port; 201 struct phylink *pl; 202 struct phylink_config pl_config; 203 204 struct list_head list; 205 206 /* 207 * Give the switch driver somewhere to hang its per-port private data 208 * structures (accessible from the tagger). 209 */ 210 void *priv; 211 212 /* 213 * Original copy of the master netdev ethtool_ops 214 */ 215 const struct ethtool_ops *orig_ethtool_ops; 216 217 /* 218 * Original copy of the master netdev net_device_ops 219 */ 220 const struct net_device_ops *orig_ndo_ops; 221 222 bool setup; 223 }; 224 225 /* TODO: ideally DSA ports would have a single dp->link_dp member, 226 * and no dst->rtable nor this struct dsa_link would be needed, 227 * but this would require some more complex tree walking, 228 * so keep it stupid at the moment and list them all. 229 */ 230 struct dsa_link { 231 struct dsa_port *dp; 232 struct dsa_port *link_dp; 233 struct list_head list; 234 }; 235 236 struct dsa_switch { 237 bool setup; 238 239 struct device *dev; 240 241 /* 242 * Parent switch tree, and switch index. 243 */ 244 struct dsa_switch_tree *dst; 245 unsigned int index; 246 247 /* Listener for switch fabric events */ 248 struct notifier_block nb; 249 250 /* 251 * Give the switch driver somewhere to hang its private data 252 * structure. 253 */ 254 void *priv; 255 256 /* 257 * Configuration data for this switch. 258 */ 259 struct dsa_chip_data *cd; 260 261 /* 262 * The switch operations. 263 */ 264 const struct dsa_switch_ops *ops; 265 266 /* 267 * Slave mii_bus and devices for the individual ports. 268 */ 269 u32 phys_mii_mask; 270 struct mii_bus *slave_mii_bus; 271 272 /* Ageing Time limits in msecs */ 273 unsigned int ageing_time_min; 274 unsigned int ageing_time_max; 275 276 /* devlink used to represent this switch device */ 277 struct devlink *devlink; 278 279 /* Number of switch port queues */ 280 unsigned int num_tx_queues; 281 282 /* Disallow bridge core from requesting different VLAN awareness 283 * settings on ports if not hardware-supported 284 */ 285 bool vlan_filtering_is_global; 286 287 /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges 288 * that have vlan_filtering=0. All drivers should ideally set this (and 289 * then the option would get removed), but it is unknown whether this 290 * would break things or not. 291 */ 292 bool configure_vlan_while_not_filtering; 293 294 /* In case vlan_filtering_is_global is set, the VLAN awareness state 295 * should be retrieved from here and not from the per-port settings. 296 */ 297 bool vlan_filtering; 298 299 /* MAC PCS does not provide link state change interrupt, and requires 300 * polling. Flag passed on to PHYLINK. 301 */ 302 bool pcs_poll; 303 304 /* For switches that only have the MRU configurable. To ensure the 305 * configured MTU is not exceeded, normalization of MRU on all bridged 306 * interfaces is needed. 307 */ 308 bool mtu_enforcement_ingress; 309 310 size_t num_ports; 311 }; 312 313 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 314 { 315 struct dsa_switch_tree *dst = ds->dst; 316 struct dsa_port *dp; 317 318 list_for_each_entry(dp, &dst->ports, list) 319 if (dp->ds == ds && dp->index == p) 320 return dp; 321 322 return NULL; 323 } 324 325 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 326 { 327 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 328 } 329 330 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 331 { 332 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 333 } 334 335 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 336 { 337 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 338 } 339 340 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 341 { 342 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 343 } 344 345 static inline u32 dsa_user_ports(struct dsa_switch *ds) 346 { 347 u32 mask = 0; 348 int p; 349 350 for (p = 0; p < ds->num_ports; p++) 351 if (dsa_is_user_port(ds, p)) 352 mask |= BIT(p); 353 354 return mask; 355 } 356 357 /* Return the local port used to reach an arbitrary switch device */ 358 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device) 359 { 360 struct dsa_switch_tree *dst = ds->dst; 361 struct dsa_link *dl; 362 363 list_for_each_entry(dl, &dst->rtable, list) 364 if (dl->dp->ds == ds && dl->link_dp->ds->index == device) 365 return dl->dp->index; 366 367 return ds->num_ports; 368 } 369 370 /* Return the local port used to reach an arbitrary switch port */ 371 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 372 int port) 373 { 374 if (device == ds->index) 375 return port; 376 else 377 return dsa_routing_port(ds, device); 378 } 379 380 /* Return the local port used to reach the dedicated CPU port */ 381 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 382 { 383 const struct dsa_port *dp = dsa_to_port(ds, port); 384 const struct dsa_port *cpu_dp = dp->cpu_dp; 385 386 if (!cpu_dp) 387 return port; 388 389 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 390 } 391 392 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 393 { 394 const struct dsa_switch *ds = dp->ds; 395 396 if (ds->vlan_filtering_is_global) 397 return ds->vlan_filtering; 398 else 399 return dp->vlan_filtering; 400 } 401 402 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 403 bool is_static, void *data); 404 struct dsa_switch_ops { 405 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 406 int port, 407 enum dsa_tag_protocol mprot); 408 409 int (*setup)(struct dsa_switch *ds); 410 void (*teardown)(struct dsa_switch *ds); 411 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 412 413 /* 414 * Access to the switch's PHY registers. 415 */ 416 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 417 int (*phy_write)(struct dsa_switch *ds, int port, 418 int regnum, u16 val); 419 420 /* 421 * Link state adjustment (called from libphy) 422 */ 423 void (*adjust_link)(struct dsa_switch *ds, int port, 424 struct phy_device *phydev); 425 void (*fixed_link_update)(struct dsa_switch *ds, int port, 426 struct fixed_phy_status *st); 427 428 /* 429 * PHYLINK integration 430 */ 431 void (*phylink_validate)(struct dsa_switch *ds, int port, 432 unsigned long *supported, 433 struct phylink_link_state *state); 434 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 435 struct phylink_link_state *state); 436 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 437 unsigned int mode, 438 const struct phylink_link_state *state); 439 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 440 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 441 unsigned int mode, 442 phy_interface_t interface); 443 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 444 unsigned int mode, 445 phy_interface_t interface, 446 struct phy_device *phydev, 447 int speed, int duplex, 448 bool tx_pause, bool rx_pause); 449 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 450 struct phylink_link_state *state); 451 /* 452 * ethtool hardware statistics. 453 */ 454 void (*get_strings)(struct dsa_switch *ds, int port, 455 u32 stringset, uint8_t *data); 456 void (*get_ethtool_stats)(struct dsa_switch *ds, 457 int port, uint64_t *data); 458 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 459 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 460 int port, uint64_t *data); 461 462 /* 463 * ethtool Wake-on-LAN 464 */ 465 void (*get_wol)(struct dsa_switch *ds, int port, 466 struct ethtool_wolinfo *w); 467 int (*set_wol)(struct dsa_switch *ds, int port, 468 struct ethtool_wolinfo *w); 469 470 /* 471 * ethtool timestamp info 472 */ 473 int (*get_ts_info)(struct dsa_switch *ds, int port, 474 struct ethtool_ts_info *ts); 475 476 /* 477 * Suspend and resume 478 */ 479 int (*suspend)(struct dsa_switch *ds); 480 int (*resume)(struct dsa_switch *ds); 481 482 /* 483 * Port enable/disable 484 */ 485 int (*port_enable)(struct dsa_switch *ds, int port, 486 struct phy_device *phy); 487 void (*port_disable)(struct dsa_switch *ds, int port); 488 489 /* 490 * Port's MAC EEE settings 491 */ 492 int (*set_mac_eee)(struct dsa_switch *ds, int port, 493 struct ethtool_eee *e); 494 int (*get_mac_eee)(struct dsa_switch *ds, int port, 495 struct ethtool_eee *e); 496 497 /* EEPROM access */ 498 int (*get_eeprom_len)(struct dsa_switch *ds); 499 int (*get_eeprom)(struct dsa_switch *ds, 500 struct ethtool_eeprom *eeprom, u8 *data); 501 int (*set_eeprom)(struct dsa_switch *ds, 502 struct ethtool_eeprom *eeprom, u8 *data); 503 504 /* 505 * Register access. 506 */ 507 int (*get_regs_len)(struct dsa_switch *ds, int port); 508 void (*get_regs)(struct dsa_switch *ds, int port, 509 struct ethtool_regs *regs, void *p); 510 511 /* 512 * Bridge integration 513 */ 514 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 515 int (*port_bridge_join)(struct dsa_switch *ds, int port, 516 struct net_device *bridge); 517 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 518 struct net_device *bridge); 519 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 520 u8 state); 521 void (*port_fast_age)(struct dsa_switch *ds, int port); 522 int (*port_egress_floods)(struct dsa_switch *ds, int port, 523 bool unicast, bool multicast); 524 525 /* 526 * VLAN support 527 */ 528 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 529 bool vlan_filtering); 530 int (*port_vlan_prepare)(struct dsa_switch *ds, int port, 531 const struct switchdev_obj_port_vlan *vlan); 532 void (*port_vlan_add)(struct dsa_switch *ds, int port, 533 const struct switchdev_obj_port_vlan *vlan); 534 int (*port_vlan_del)(struct dsa_switch *ds, int port, 535 const struct switchdev_obj_port_vlan *vlan); 536 /* 537 * Forwarding database 538 */ 539 int (*port_fdb_add)(struct dsa_switch *ds, int port, 540 const unsigned char *addr, u16 vid); 541 int (*port_fdb_del)(struct dsa_switch *ds, int port, 542 const unsigned char *addr, u16 vid); 543 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 544 dsa_fdb_dump_cb_t *cb, void *data); 545 546 /* 547 * Multicast database 548 */ 549 int (*port_mdb_prepare)(struct dsa_switch *ds, int port, 550 const struct switchdev_obj_port_mdb *mdb); 551 void (*port_mdb_add)(struct dsa_switch *ds, int port, 552 const struct switchdev_obj_port_mdb *mdb); 553 int (*port_mdb_del)(struct dsa_switch *ds, int port, 554 const struct switchdev_obj_port_mdb *mdb); 555 /* 556 * RXNFC 557 */ 558 int (*get_rxnfc)(struct dsa_switch *ds, int port, 559 struct ethtool_rxnfc *nfc, u32 *rule_locs); 560 int (*set_rxnfc)(struct dsa_switch *ds, int port, 561 struct ethtool_rxnfc *nfc); 562 563 /* 564 * TC integration 565 */ 566 int (*cls_flower_add)(struct dsa_switch *ds, int port, 567 struct flow_cls_offload *cls, bool ingress); 568 int (*cls_flower_del)(struct dsa_switch *ds, int port, 569 struct flow_cls_offload *cls, bool ingress); 570 int (*cls_flower_stats)(struct dsa_switch *ds, int port, 571 struct flow_cls_offload *cls, bool ingress); 572 int (*port_mirror_add)(struct dsa_switch *ds, int port, 573 struct dsa_mall_mirror_tc_entry *mirror, 574 bool ingress); 575 void (*port_mirror_del)(struct dsa_switch *ds, int port, 576 struct dsa_mall_mirror_tc_entry *mirror); 577 int (*port_policer_add)(struct dsa_switch *ds, int port, 578 struct dsa_mall_policer_tc_entry *policer); 579 void (*port_policer_del)(struct dsa_switch *ds, int port); 580 int (*port_setup_tc)(struct dsa_switch *ds, int port, 581 enum tc_setup_type type, void *type_data); 582 583 /* 584 * Cross-chip operations 585 */ 586 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index, 587 int sw_index, int port, 588 struct net_device *br); 589 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index, 590 int sw_index, int port, 591 struct net_device *br); 592 593 /* 594 * PTP functionality 595 */ 596 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 597 struct ifreq *ifr); 598 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 599 struct ifreq *ifr); 600 bool (*port_txtstamp)(struct dsa_switch *ds, int port, 601 struct sk_buff *clone, unsigned int type); 602 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 603 struct sk_buff *skb, unsigned int type); 604 605 /* Devlink parameters */ 606 int (*devlink_param_get)(struct dsa_switch *ds, u32 id, 607 struct devlink_param_gset_ctx *ctx); 608 int (*devlink_param_set)(struct dsa_switch *ds, u32 id, 609 struct devlink_param_gset_ctx *ctx); 610 611 /* 612 * MTU change functionality. Switches can also adjust their MRU through 613 * this method. By MTU, one understands the SDU (L2 payload) length. 614 * If the switch needs to account for the DSA tag on the CPU port, this 615 * method needs to to do so privately. 616 */ 617 int (*port_change_mtu)(struct dsa_switch *ds, int port, 618 int new_mtu); 619 int (*port_max_mtu)(struct dsa_switch *ds, int port); 620 }; 621 622 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \ 623 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \ 624 dsa_devlink_param_get, dsa_devlink_param_set, NULL) 625 626 int dsa_devlink_param_get(struct devlink *dl, u32 id, 627 struct devlink_param_gset_ctx *ctx); 628 int dsa_devlink_param_set(struct devlink *dl, u32 id, 629 struct devlink_param_gset_ctx *ctx); 630 int dsa_devlink_params_register(struct dsa_switch *ds, 631 const struct devlink_param *params, 632 size_t params_count); 633 void dsa_devlink_params_unregister(struct dsa_switch *ds, 634 const struct devlink_param *params, 635 size_t params_count); 636 int dsa_devlink_resource_register(struct dsa_switch *ds, 637 const char *resource_name, 638 u64 resource_size, 639 u64 resource_id, 640 u64 parent_resource_id, 641 const struct devlink_resource_size_params *size_params); 642 643 void dsa_devlink_resources_unregister(struct dsa_switch *ds); 644 645 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds, 646 u64 resource_id, 647 devlink_resource_occ_get_t *occ_get, 648 void *occ_get_priv); 649 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds, 650 u64 resource_id); 651 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev); 652 653 struct dsa_devlink_priv { 654 struct dsa_switch *ds; 655 }; 656 657 struct dsa_switch_driver { 658 struct list_head list; 659 const struct dsa_switch_ops *ops; 660 }; 661 662 struct net_device *dsa_dev_to_net_device(struct device *dev); 663 664 /* Keep inline for faster access in hot path */ 665 static inline bool netdev_uses_dsa(const struct net_device *dev) 666 { 667 #if IS_ENABLED(CONFIG_NET_DSA) 668 return dev->dsa_ptr && dev->dsa_ptr->rcv; 669 #endif 670 return false; 671 } 672 673 static inline bool dsa_can_decode(const struct sk_buff *skb, 674 struct net_device *dev) 675 { 676 #if IS_ENABLED(CONFIG_NET_DSA) 677 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev); 678 #endif 679 return false; 680 } 681 682 void dsa_unregister_switch(struct dsa_switch *ds); 683 int dsa_register_switch(struct dsa_switch *ds); 684 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index); 685 #ifdef CONFIG_PM_SLEEP 686 int dsa_switch_suspend(struct dsa_switch *ds); 687 int dsa_switch_resume(struct dsa_switch *ds); 688 #else 689 static inline int dsa_switch_suspend(struct dsa_switch *ds) 690 { 691 return 0; 692 } 693 static inline int dsa_switch_resume(struct dsa_switch *ds) 694 { 695 return 0; 696 } 697 #endif /* CONFIG_PM_SLEEP */ 698 699 enum dsa_notifier_type { 700 DSA_PORT_REGISTER, 701 DSA_PORT_UNREGISTER, 702 }; 703 704 struct dsa_notifier_info { 705 struct net_device *dev; 706 }; 707 708 struct dsa_notifier_register_info { 709 struct dsa_notifier_info info; /* must be first */ 710 struct net_device *master; 711 unsigned int port_number; 712 unsigned int switch_number; 713 }; 714 715 static inline struct net_device * 716 dsa_notifier_info_to_dev(const struct dsa_notifier_info *info) 717 { 718 return info->dev; 719 } 720 721 #if IS_ENABLED(CONFIG_NET_DSA) 722 int register_dsa_notifier(struct notifier_block *nb); 723 int unregister_dsa_notifier(struct notifier_block *nb); 724 int call_dsa_notifiers(unsigned long val, struct net_device *dev, 725 struct dsa_notifier_info *info); 726 #else 727 static inline int register_dsa_notifier(struct notifier_block *nb) 728 { 729 return 0; 730 } 731 732 static inline int unregister_dsa_notifier(struct notifier_block *nb) 733 { 734 return 0; 735 } 736 737 static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev, 738 struct dsa_notifier_info *info) 739 { 740 return NOTIFY_DONE; 741 } 742 #endif 743 744 /* Broadcom tag specific helpers to insert and extract queue/port number */ 745 #define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q) 746 #define BRCM_TAG_GET_PORT(v) ((v) >> 8) 747 #define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff) 748 749 750 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 751 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data); 752 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data); 753 int dsa_port_get_phy_sset_count(struct dsa_port *dp); 754 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 755 756 struct dsa_tag_driver { 757 const struct dsa_device_ops *ops; 758 struct list_head list; 759 struct module *owner; 760 }; 761 762 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 763 unsigned int count, 764 struct module *owner); 765 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 766 unsigned int count); 767 768 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 769 static int __init dsa_tag_driver_module_init(void) \ 770 { \ 771 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 772 THIS_MODULE); \ 773 return 0; \ 774 } \ 775 module_init(dsa_tag_driver_module_init); \ 776 \ 777 static void __exit dsa_tag_driver_module_exit(void) \ 778 { \ 779 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 780 } \ 781 module_exit(dsa_tag_driver_module_exit) 782 783 /** 784 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 785 * drivers 786 * @__ops_array: Array of tag driver strucutres 787 * 788 * Helper macro for DSA tag drivers which do not do anything special 789 * in module init/exit. Each module may only use this macro once, and 790 * calling it replaces module_init() and module_exit(). 791 */ 792 #define module_dsa_tag_drivers(__ops_array) \ 793 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 794 795 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 796 797 /* Create a static structure we can build a linked list of dsa_tag 798 * drivers 799 */ 800 #define DSA_TAG_DRIVER(__ops) \ 801 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 802 .ops = &__ops, \ 803 } 804 805 /** 806 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 807 * driver 808 * @__ops: Single tag driver structures 809 * 810 * Helper macro for DSA tag drivers which do not do anything special 811 * in module init/exit. Each module may only use this macro once, and 812 * calling it replaces module_init() and module_exit(). 813 */ 814 #define module_dsa_tag_driver(__ops) \ 815 DSA_TAG_DRIVER(__ops); \ 816 \ 817 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 818 &DSA_TAG_DRIVER_NAME(__ops) \ 819 }; \ 820 module_dsa_tag_drivers(dsa_tag_driver_array) 821 #endif 822 823