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 #define DSA_TAG_PROTO_HELLCREEK_VALUE 18 49 #define DSA_TAG_PROTO_XRS700X_VALUE 19 50 #define DSA_TAG_PROTO_OCELOT_8021Q_VALUE 20 51 #define DSA_TAG_PROTO_SEVILLE_VALUE 21 52 #define DSA_TAG_PROTO_BRCM_LEGACY_VALUE 22 53 54 enum dsa_tag_protocol { 55 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, 56 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, 57 DSA_TAG_PROTO_BRCM_LEGACY = DSA_TAG_PROTO_BRCM_LEGACY_VALUE, 58 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, 59 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, 60 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, 61 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE, 62 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE, 63 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, 64 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, 65 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, 66 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, 67 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, 68 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, 69 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE, 70 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE, 71 DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE, 72 DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_VALUE, 73 DSA_TAG_PROTO_RTL4_A = DSA_TAG_PROTO_RTL4_A_VALUE, 74 DSA_TAG_PROTO_HELLCREEK = DSA_TAG_PROTO_HELLCREEK_VALUE, 75 DSA_TAG_PROTO_XRS700X = DSA_TAG_PROTO_XRS700X_VALUE, 76 DSA_TAG_PROTO_OCELOT_8021Q = DSA_TAG_PROTO_OCELOT_8021Q_VALUE, 77 DSA_TAG_PROTO_SEVILLE = DSA_TAG_PROTO_SEVILLE_VALUE, 78 }; 79 80 struct packet_type; 81 struct dsa_switch; 82 83 struct dsa_device_ops { 84 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev); 85 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 86 struct packet_type *pt); 87 void (*flow_dissect)(const struct sk_buff *skb, __be16 *proto, 88 int *offset); 89 /* Used to determine which traffic should match the DSA filter in 90 * eth_type_trans, and which, if any, should bypass it and be processed 91 * as regular on the master net device. 92 */ 93 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 94 unsigned int overhead; 95 const char *name; 96 enum dsa_tag_protocol proto; 97 /* Some tagging protocols either mangle or shift the destination MAC 98 * address, in which case the DSA master would drop packets on ingress 99 * if what it understands out of the destination MAC address is not in 100 * its RX filter. 101 */ 102 bool promisc_on_master; 103 bool tail_tag; 104 }; 105 106 /* This structure defines the control interfaces that are overlayed by the 107 * DSA layer on top of the DSA CPU/management net_device instance. This is 108 * used by the core net_device layer while calling various net_device_ops 109 * function pointers. 110 */ 111 struct dsa_netdevice_ops { 112 int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, 113 int cmd); 114 }; 115 116 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-" 117 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \ 118 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE)) 119 120 struct dsa_switch_tree { 121 struct list_head list; 122 123 /* Notifier chain for switch-wide events */ 124 struct raw_notifier_head nh; 125 126 /* Tree identifier */ 127 unsigned int index; 128 129 /* Number of switches attached to this tree */ 130 struct kref refcount; 131 132 /* Has this tree been applied to the hardware? */ 133 bool setup; 134 135 /* Tagging protocol operations */ 136 const struct dsa_device_ops *tag_ops; 137 138 /* Default tagging protocol preferred by the switches in this 139 * tree. 140 */ 141 enum dsa_tag_protocol default_proto; 142 143 /* 144 * Configuration data for the platform device that owns 145 * this dsa switch tree instance. 146 */ 147 struct dsa_platform_data *pd; 148 149 /* List of switch ports */ 150 struct list_head ports; 151 152 /* List of DSA links composing the routing table */ 153 struct list_head rtable; 154 155 /* Maps offloaded LAG netdevs to a zero-based linear ID for 156 * drivers that need it. 157 */ 158 struct net_device **lags; 159 unsigned int lags_len; 160 }; 161 162 #define dsa_lags_foreach_id(_id, _dst) \ 163 for ((_id) = 0; (_id) < (_dst)->lags_len; (_id)++) \ 164 if ((_dst)->lags[(_id)]) 165 166 #define dsa_lag_foreach_port(_dp, _dst, _lag) \ 167 list_for_each_entry((_dp), &(_dst)->ports, list) \ 168 if ((_dp)->lag_dev == (_lag)) 169 170 #define dsa_hsr_foreach_port(_dp, _ds, _hsr) \ 171 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \ 172 if ((_dp)->ds == (_ds) && (_dp)->hsr_dev == (_hsr)) 173 174 static inline struct net_device *dsa_lag_dev(struct dsa_switch_tree *dst, 175 unsigned int id) 176 { 177 return dst->lags[id]; 178 } 179 180 static inline int dsa_lag_id(struct dsa_switch_tree *dst, 181 struct net_device *lag) 182 { 183 unsigned int id; 184 185 dsa_lags_foreach_id(id, dst) { 186 if (dsa_lag_dev(dst, id) == lag) 187 return id; 188 } 189 190 return -ENODEV; 191 } 192 193 /* TC matchall action types */ 194 enum dsa_port_mall_action_type { 195 DSA_PORT_MALL_MIRROR, 196 DSA_PORT_MALL_POLICER, 197 }; 198 199 /* TC mirroring entry */ 200 struct dsa_mall_mirror_tc_entry { 201 u8 to_local_port; 202 bool ingress; 203 }; 204 205 /* TC port policer entry */ 206 struct dsa_mall_policer_tc_entry { 207 u32 burst; 208 u64 rate_bytes_per_sec; 209 }; 210 211 /* TC matchall entry */ 212 struct dsa_mall_tc_entry { 213 struct list_head list; 214 unsigned long cookie; 215 enum dsa_port_mall_action_type type; 216 union { 217 struct dsa_mall_mirror_tc_entry mirror; 218 struct dsa_mall_policer_tc_entry policer; 219 }; 220 }; 221 222 223 struct dsa_port { 224 /* A CPU port is physically connected to a master device. 225 * A user port exposed to userspace has a slave device. 226 */ 227 union { 228 struct net_device *master; 229 struct net_device *slave; 230 }; 231 232 /* Copy of the tagging protocol operations, for quicker access 233 * in the data path. Valid only for the CPU ports. 234 */ 235 const struct dsa_device_ops *tag_ops; 236 237 /* Copies for faster access in master receive hot path */ 238 struct dsa_switch_tree *dst; 239 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 240 struct packet_type *pt); 241 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 242 243 enum { 244 DSA_PORT_TYPE_UNUSED = 0, 245 DSA_PORT_TYPE_CPU, 246 DSA_PORT_TYPE_DSA, 247 DSA_PORT_TYPE_USER, 248 } type; 249 250 struct dsa_switch *ds; 251 unsigned int index; 252 const char *name; 253 struct dsa_port *cpu_dp; 254 u8 mac[ETH_ALEN]; 255 struct device_node *dn; 256 unsigned int ageing_time; 257 bool vlan_filtering; 258 u8 stp_state; 259 struct net_device *bridge_dev; 260 struct devlink_port devlink_port; 261 bool devlink_port_setup; 262 struct phylink *pl; 263 struct phylink_config pl_config; 264 struct net_device *lag_dev; 265 bool lag_tx_enabled; 266 struct net_device *hsr_dev; 267 268 struct list_head list; 269 270 /* 271 * Give the switch driver somewhere to hang its per-port private data 272 * structures (accessible from the tagger). 273 */ 274 void *priv; 275 276 /* 277 * Original copy of the master netdev ethtool_ops 278 */ 279 const struct ethtool_ops *orig_ethtool_ops; 280 281 /* 282 * Original copy of the master netdev net_device_ops 283 */ 284 const struct dsa_netdevice_ops *netdev_ops; 285 286 bool setup; 287 }; 288 289 /* TODO: ideally DSA ports would have a single dp->link_dp member, 290 * and no dst->rtable nor this struct dsa_link would be needed, 291 * but this would require some more complex tree walking, 292 * so keep it stupid at the moment and list them all. 293 */ 294 struct dsa_link { 295 struct dsa_port *dp; 296 struct dsa_port *link_dp; 297 struct list_head list; 298 }; 299 300 struct dsa_switch { 301 bool setup; 302 303 struct device *dev; 304 305 /* 306 * Parent switch tree, and switch index. 307 */ 308 struct dsa_switch_tree *dst; 309 unsigned int index; 310 311 /* Listener for switch fabric events */ 312 struct notifier_block nb; 313 314 /* 315 * Give the switch driver somewhere to hang its private data 316 * structure. 317 */ 318 void *priv; 319 320 /* 321 * Configuration data for this switch. 322 */ 323 struct dsa_chip_data *cd; 324 325 /* 326 * The switch operations. 327 */ 328 const struct dsa_switch_ops *ops; 329 330 /* 331 * Slave mii_bus and devices for the individual ports. 332 */ 333 u32 phys_mii_mask; 334 struct mii_bus *slave_mii_bus; 335 336 /* Ageing Time limits in msecs */ 337 unsigned int ageing_time_min; 338 unsigned int ageing_time_max; 339 340 /* devlink used to represent this switch device */ 341 struct devlink *devlink; 342 343 /* Number of switch port queues */ 344 unsigned int num_tx_queues; 345 346 /* Disallow bridge core from requesting different VLAN awareness 347 * settings on ports if not hardware-supported 348 */ 349 bool vlan_filtering_is_global; 350 351 /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges 352 * that have vlan_filtering=0. All drivers should ideally set this (and 353 * then the option would get removed), but it is unknown whether this 354 * would break things or not. 355 */ 356 bool configure_vlan_while_not_filtering; 357 358 /* If the switch driver always programs the CPU port as egress tagged 359 * despite the VLAN configuration indicating otherwise, then setting 360 * @untag_bridge_pvid will force the DSA receive path to pop the bridge's 361 * default_pvid VLAN tagged frames to offer a consistent behavior 362 * between a vlan_filtering=0 and vlan_filtering=1 bridge device. 363 */ 364 bool untag_bridge_pvid; 365 366 /* Let DSA manage the FDB entries towards the CPU, based on the 367 * software bridge database. 368 */ 369 bool assisted_learning_on_cpu_port; 370 371 /* In case vlan_filtering_is_global is set, the VLAN awareness state 372 * should be retrieved from here and not from the per-port settings. 373 */ 374 bool vlan_filtering; 375 376 /* MAC PCS does not provide link state change interrupt, and requires 377 * polling. Flag passed on to PHYLINK. 378 */ 379 bool pcs_poll; 380 381 /* For switches that only have the MRU configurable. To ensure the 382 * configured MTU is not exceeded, normalization of MRU on all bridged 383 * interfaces is needed. 384 */ 385 bool mtu_enforcement_ingress; 386 387 /* Drivers that benefit from having an ID associated with each 388 * offloaded LAG should set this to the maximum number of 389 * supported IDs. DSA will then maintain a mapping of _at 390 * least_ these many IDs, accessible to drivers via 391 * dsa_lag_id(). 392 */ 393 unsigned int num_lag_ids; 394 395 size_t num_ports; 396 }; 397 398 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 399 { 400 struct dsa_switch_tree *dst = ds->dst; 401 struct dsa_port *dp; 402 403 list_for_each_entry(dp, &dst->ports, list) 404 if (dp->ds == ds && dp->index == p) 405 return dp; 406 407 return NULL; 408 } 409 410 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 411 { 412 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 413 } 414 415 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 416 { 417 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 418 } 419 420 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 421 { 422 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 423 } 424 425 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 426 { 427 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 428 } 429 430 static inline u32 dsa_user_ports(struct dsa_switch *ds) 431 { 432 u32 mask = 0; 433 int p; 434 435 for (p = 0; p < ds->num_ports; p++) 436 if (dsa_is_user_port(ds, p)) 437 mask |= BIT(p); 438 439 return mask; 440 } 441 442 /* Return the local port used to reach an arbitrary switch device */ 443 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device) 444 { 445 struct dsa_switch_tree *dst = ds->dst; 446 struct dsa_link *dl; 447 448 list_for_each_entry(dl, &dst->rtable, list) 449 if (dl->dp->ds == ds && dl->link_dp->ds->index == device) 450 return dl->dp->index; 451 452 return ds->num_ports; 453 } 454 455 /* Return the local port used to reach an arbitrary switch port */ 456 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 457 int port) 458 { 459 if (device == ds->index) 460 return port; 461 else 462 return dsa_routing_port(ds, device); 463 } 464 465 /* Return the local port used to reach the dedicated CPU port */ 466 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 467 { 468 const struct dsa_port *dp = dsa_to_port(ds, port); 469 const struct dsa_port *cpu_dp = dp->cpu_dp; 470 471 if (!cpu_dp) 472 return port; 473 474 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 475 } 476 477 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 478 { 479 const struct dsa_switch *ds = dp->ds; 480 481 if (ds->vlan_filtering_is_global) 482 return ds->vlan_filtering; 483 else 484 return dp->vlan_filtering; 485 } 486 487 static inline 488 struct net_device *dsa_port_to_bridge_port(const struct dsa_port *dp) 489 { 490 if (!dp->bridge_dev) 491 return NULL; 492 493 if (dp->lag_dev) 494 return dp->lag_dev; 495 else if (dp->hsr_dev) 496 return dp->hsr_dev; 497 498 return dp->slave; 499 } 500 501 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 502 bool is_static, void *data); 503 struct dsa_switch_ops { 504 /* 505 * Tagging protocol helpers called for the CPU ports and DSA links. 506 * @get_tag_protocol retrieves the initial tagging protocol and is 507 * mandatory. Switches which can operate using multiple tagging 508 * protocols should implement @change_tag_protocol and report in 509 * @get_tag_protocol the tagger in current use. 510 */ 511 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 512 int port, 513 enum dsa_tag_protocol mprot); 514 int (*change_tag_protocol)(struct dsa_switch *ds, int port, 515 enum dsa_tag_protocol proto); 516 517 int (*setup)(struct dsa_switch *ds); 518 void (*teardown)(struct dsa_switch *ds); 519 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 520 521 /* 522 * Access to the switch's PHY registers. 523 */ 524 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 525 int (*phy_write)(struct dsa_switch *ds, int port, 526 int regnum, u16 val); 527 528 /* 529 * Link state adjustment (called from libphy) 530 */ 531 void (*adjust_link)(struct dsa_switch *ds, int port, 532 struct phy_device *phydev); 533 void (*fixed_link_update)(struct dsa_switch *ds, int port, 534 struct fixed_phy_status *st); 535 536 /* 537 * PHYLINK integration 538 */ 539 void (*phylink_validate)(struct dsa_switch *ds, int port, 540 unsigned long *supported, 541 struct phylink_link_state *state); 542 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 543 struct phylink_link_state *state); 544 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 545 unsigned int mode, 546 const struct phylink_link_state *state); 547 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 548 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 549 unsigned int mode, 550 phy_interface_t interface); 551 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 552 unsigned int mode, 553 phy_interface_t interface, 554 struct phy_device *phydev, 555 int speed, int duplex, 556 bool tx_pause, bool rx_pause); 557 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 558 struct phylink_link_state *state); 559 /* 560 * Port statistics counters. 561 */ 562 void (*get_strings)(struct dsa_switch *ds, int port, 563 u32 stringset, uint8_t *data); 564 void (*get_ethtool_stats)(struct dsa_switch *ds, 565 int port, uint64_t *data); 566 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 567 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 568 int port, uint64_t *data); 569 void (*get_stats64)(struct dsa_switch *ds, int port, 570 struct rtnl_link_stats64 *s); 571 void (*self_test)(struct dsa_switch *ds, int port, 572 struct ethtool_test *etest, u64 *data); 573 574 /* 575 * ethtool Wake-on-LAN 576 */ 577 void (*get_wol)(struct dsa_switch *ds, int port, 578 struct ethtool_wolinfo *w); 579 int (*set_wol)(struct dsa_switch *ds, int port, 580 struct ethtool_wolinfo *w); 581 582 /* 583 * ethtool timestamp info 584 */ 585 int (*get_ts_info)(struct dsa_switch *ds, int port, 586 struct ethtool_ts_info *ts); 587 588 /* 589 * Suspend and resume 590 */ 591 int (*suspend)(struct dsa_switch *ds); 592 int (*resume)(struct dsa_switch *ds); 593 594 /* 595 * Port enable/disable 596 */ 597 int (*port_enable)(struct dsa_switch *ds, int port, 598 struct phy_device *phy); 599 void (*port_disable)(struct dsa_switch *ds, int port); 600 601 /* 602 * Port's MAC EEE settings 603 */ 604 int (*set_mac_eee)(struct dsa_switch *ds, int port, 605 struct ethtool_eee *e); 606 int (*get_mac_eee)(struct dsa_switch *ds, int port, 607 struct ethtool_eee *e); 608 609 /* EEPROM access */ 610 int (*get_eeprom_len)(struct dsa_switch *ds); 611 int (*get_eeprom)(struct dsa_switch *ds, 612 struct ethtool_eeprom *eeprom, u8 *data); 613 int (*set_eeprom)(struct dsa_switch *ds, 614 struct ethtool_eeprom *eeprom, u8 *data); 615 616 /* 617 * Register access. 618 */ 619 int (*get_regs_len)(struct dsa_switch *ds, int port); 620 void (*get_regs)(struct dsa_switch *ds, int port, 621 struct ethtool_regs *regs, void *p); 622 623 /* 624 * Upper device tracking. 625 */ 626 int (*port_prechangeupper)(struct dsa_switch *ds, int port, 627 struct netdev_notifier_changeupper_info *info); 628 629 /* 630 * Bridge integration 631 */ 632 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 633 int (*port_bridge_join)(struct dsa_switch *ds, int port, 634 struct net_device *bridge); 635 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 636 struct net_device *bridge); 637 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 638 u8 state); 639 void (*port_fast_age)(struct dsa_switch *ds, int port); 640 int (*port_pre_bridge_flags)(struct dsa_switch *ds, int port, 641 struct switchdev_brport_flags flags, 642 struct netlink_ext_ack *extack); 643 int (*port_bridge_flags)(struct dsa_switch *ds, int port, 644 struct switchdev_brport_flags flags, 645 struct netlink_ext_ack *extack); 646 int (*port_set_mrouter)(struct dsa_switch *ds, int port, bool mrouter, 647 struct netlink_ext_ack *extack); 648 649 /* 650 * VLAN support 651 */ 652 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 653 bool vlan_filtering, 654 struct netlink_ext_ack *extack); 655 int (*port_vlan_add)(struct dsa_switch *ds, int port, 656 const struct switchdev_obj_port_vlan *vlan, 657 struct netlink_ext_ack *extack); 658 int (*port_vlan_del)(struct dsa_switch *ds, int port, 659 const struct switchdev_obj_port_vlan *vlan); 660 /* 661 * Forwarding database 662 */ 663 int (*port_fdb_add)(struct dsa_switch *ds, int port, 664 const unsigned char *addr, u16 vid); 665 int (*port_fdb_del)(struct dsa_switch *ds, int port, 666 const unsigned char *addr, u16 vid); 667 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 668 dsa_fdb_dump_cb_t *cb, void *data); 669 670 /* 671 * Multicast database 672 */ 673 int (*port_mdb_add)(struct dsa_switch *ds, int port, 674 const struct switchdev_obj_port_mdb *mdb); 675 int (*port_mdb_del)(struct dsa_switch *ds, int port, 676 const struct switchdev_obj_port_mdb *mdb); 677 /* 678 * RXNFC 679 */ 680 int (*get_rxnfc)(struct dsa_switch *ds, int port, 681 struct ethtool_rxnfc *nfc, u32 *rule_locs); 682 int (*set_rxnfc)(struct dsa_switch *ds, int port, 683 struct ethtool_rxnfc *nfc); 684 685 /* 686 * TC integration 687 */ 688 int (*cls_flower_add)(struct dsa_switch *ds, int port, 689 struct flow_cls_offload *cls, bool ingress); 690 int (*cls_flower_del)(struct dsa_switch *ds, int port, 691 struct flow_cls_offload *cls, bool ingress); 692 int (*cls_flower_stats)(struct dsa_switch *ds, int port, 693 struct flow_cls_offload *cls, bool ingress); 694 int (*port_mirror_add)(struct dsa_switch *ds, int port, 695 struct dsa_mall_mirror_tc_entry *mirror, 696 bool ingress); 697 void (*port_mirror_del)(struct dsa_switch *ds, int port, 698 struct dsa_mall_mirror_tc_entry *mirror); 699 int (*port_policer_add)(struct dsa_switch *ds, int port, 700 struct dsa_mall_policer_tc_entry *policer); 701 void (*port_policer_del)(struct dsa_switch *ds, int port); 702 int (*port_setup_tc)(struct dsa_switch *ds, int port, 703 enum tc_setup_type type, void *type_data); 704 705 /* 706 * Cross-chip operations 707 */ 708 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index, 709 int sw_index, int port, 710 struct net_device *br); 711 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index, 712 int sw_index, int port, 713 struct net_device *br); 714 int (*crosschip_lag_change)(struct dsa_switch *ds, int sw_index, 715 int port); 716 int (*crosschip_lag_join)(struct dsa_switch *ds, int sw_index, 717 int port, struct net_device *lag, 718 struct netdev_lag_upper_info *info); 719 int (*crosschip_lag_leave)(struct dsa_switch *ds, int sw_index, 720 int port, struct net_device *lag); 721 722 /* 723 * PTP functionality 724 */ 725 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 726 struct ifreq *ifr); 727 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 728 struct ifreq *ifr); 729 void (*port_txtstamp)(struct dsa_switch *ds, int port, 730 struct sk_buff *skb); 731 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 732 struct sk_buff *skb, unsigned int type); 733 734 /* Devlink parameters, etc */ 735 int (*devlink_param_get)(struct dsa_switch *ds, u32 id, 736 struct devlink_param_gset_ctx *ctx); 737 int (*devlink_param_set)(struct dsa_switch *ds, u32 id, 738 struct devlink_param_gset_ctx *ctx); 739 int (*devlink_info_get)(struct dsa_switch *ds, 740 struct devlink_info_req *req, 741 struct netlink_ext_ack *extack); 742 int (*devlink_sb_pool_get)(struct dsa_switch *ds, 743 unsigned int sb_index, u16 pool_index, 744 struct devlink_sb_pool_info *pool_info); 745 int (*devlink_sb_pool_set)(struct dsa_switch *ds, unsigned int sb_index, 746 u16 pool_index, u32 size, 747 enum devlink_sb_threshold_type threshold_type, 748 struct netlink_ext_ack *extack); 749 int (*devlink_sb_port_pool_get)(struct dsa_switch *ds, int port, 750 unsigned int sb_index, u16 pool_index, 751 u32 *p_threshold); 752 int (*devlink_sb_port_pool_set)(struct dsa_switch *ds, int port, 753 unsigned int sb_index, u16 pool_index, 754 u32 threshold, 755 struct netlink_ext_ack *extack); 756 int (*devlink_sb_tc_pool_bind_get)(struct dsa_switch *ds, int port, 757 unsigned int sb_index, u16 tc_index, 758 enum devlink_sb_pool_type pool_type, 759 u16 *p_pool_index, u32 *p_threshold); 760 int (*devlink_sb_tc_pool_bind_set)(struct dsa_switch *ds, int port, 761 unsigned int sb_index, u16 tc_index, 762 enum devlink_sb_pool_type pool_type, 763 u16 pool_index, u32 threshold, 764 struct netlink_ext_ack *extack); 765 int (*devlink_sb_occ_snapshot)(struct dsa_switch *ds, 766 unsigned int sb_index); 767 int (*devlink_sb_occ_max_clear)(struct dsa_switch *ds, 768 unsigned int sb_index); 769 int (*devlink_sb_occ_port_pool_get)(struct dsa_switch *ds, int port, 770 unsigned int sb_index, u16 pool_index, 771 u32 *p_cur, u32 *p_max); 772 int (*devlink_sb_occ_tc_port_bind_get)(struct dsa_switch *ds, int port, 773 unsigned int sb_index, u16 tc_index, 774 enum devlink_sb_pool_type pool_type, 775 u32 *p_cur, u32 *p_max); 776 777 /* 778 * MTU change functionality. Switches can also adjust their MRU through 779 * this method. By MTU, one understands the SDU (L2 payload) length. 780 * If the switch needs to account for the DSA tag on the CPU port, this 781 * method needs to do so privately. 782 */ 783 int (*port_change_mtu)(struct dsa_switch *ds, int port, 784 int new_mtu); 785 int (*port_max_mtu)(struct dsa_switch *ds, int port); 786 787 /* 788 * LAG integration 789 */ 790 int (*port_lag_change)(struct dsa_switch *ds, int port); 791 int (*port_lag_join)(struct dsa_switch *ds, int port, 792 struct net_device *lag, 793 struct netdev_lag_upper_info *info); 794 int (*port_lag_leave)(struct dsa_switch *ds, int port, 795 struct net_device *lag); 796 797 /* 798 * HSR integration 799 */ 800 int (*port_hsr_join)(struct dsa_switch *ds, int port, 801 struct net_device *hsr); 802 int (*port_hsr_leave)(struct dsa_switch *ds, int port, 803 struct net_device *hsr); 804 805 /* 806 * MRP integration 807 */ 808 int (*port_mrp_add)(struct dsa_switch *ds, int port, 809 const struct switchdev_obj_mrp *mrp); 810 int (*port_mrp_del)(struct dsa_switch *ds, int port, 811 const struct switchdev_obj_mrp *mrp); 812 int (*port_mrp_add_ring_role)(struct dsa_switch *ds, int port, 813 const struct switchdev_obj_ring_role_mrp *mrp); 814 int (*port_mrp_del_ring_role)(struct dsa_switch *ds, int port, 815 const struct switchdev_obj_ring_role_mrp *mrp); 816 }; 817 818 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \ 819 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \ 820 dsa_devlink_param_get, dsa_devlink_param_set, NULL) 821 822 int dsa_devlink_param_get(struct devlink *dl, u32 id, 823 struct devlink_param_gset_ctx *ctx); 824 int dsa_devlink_param_set(struct devlink *dl, u32 id, 825 struct devlink_param_gset_ctx *ctx); 826 int dsa_devlink_params_register(struct dsa_switch *ds, 827 const struct devlink_param *params, 828 size_t params_count); 829 void dsa_devlink_params_unregister(struct dsa_switch *ds, 830 const struct devlink_param *params, 831 size_t params_count); 832 int dsa_devlink_resource_register(struct dsa_switch *ds, 833 const char *resource_name, 834 u64 resource_size, 835 u64 resource_id, 836 u64 parent_resource_id, 837 const struct devlink_resource_size_params *size_params); 838 839 void dsa_devlink_resources_unregister(struct dsa_switch *ds); 840 841 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds, 842 u64 resource_id, 843 devlink_resource_occ_get_t *occ_get, 844 void *occ_get_priv); 845 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds, 846 u64 resource_id); 847 struct devlink_region * 848 dsa_devlink_region_create(struct dsa_switch *ds, 849 const struct devlink_region_ops *ops, 850 u32 region_max_snapshots, u64 region_size); 851 struct devlink_region * 852 dsa_devlink_port_region_create(struct dsa_switch *ds, 853 int port, 854 const struct devlink_port_region_ops *ops, 855 u32 region_max_snapshots, u64 region_size); 856 void dsa_devlink_region_destroy(struct devlink_region *region); 857 858 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev); 859 860 struct dsa_devlink_priv { 861 struct dsa_switch *ds; 862 }; 863 864 static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl) 865 { 866 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 867 868 return dl_priv->ds; 869 } 870 871 static inline 872 struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port) 873 { 874 struct devlink *dl = port->devlink; 875 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 876 877 return dl_priv->ds; 878 } 879 880 static inline int dsa_devlink_port_to_port(struct devlink_port *port) 881 { 882 return port->index; 883 } 884 885 struct dsa_switch_driver { 886 struct list_head list; 887 const struct dsa_switch_ops *ops; 888 }; 889 890 struct net_device *dsa_dev_to_net_device(struct device *dev); 891 892 /* Keep inline for faster access in hot path */ 893 static inline bool netdev_uses_dsa(const struct net_device *dev) 894 { 895 #if IS_ENABLED(CONFIG_NET_DSA) 896 return dev->dsa_ptr && dev->dsa_ptr->rcv; 897 #endif 898 return false; 899 } 900 901 static inline bool dsa_can_decode(const struct sk_buff *skb, 902 struct net_device *dev) 903 { 904 #if IS_ENABLED(CONFIG_NET_DSA) 905 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev); 906 #endif 907 return false; 908 } 909 910 /* All DSA tags that push the EtherType to the right (basically all except tail 911 * tags, which don't break dissection) can be treated the same from the 912 * perspective of the flow dissector. 913 * 914 * We need to return: 915 * - offset: the (B - A) difference between: 916 * A. the position of the real EtherType and 917 * B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes 918 * after the normal EtherType was supposed to be) 919 * The offset in bytes is exactly equal to the tagger overhead (and half of 920 * that, in __be16 shorts). 921 * 922 * - proto: the value of the real EtherType. 923 */ 924 static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb, 925 __be16 *proto, int *offset) 926 { 927 #if IS_ENABLED(CONFIG_NET_DSA) 928 const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops; 929 int tag_len = ops->overhead; 930 931 *offset = tag_len; 932 *proto = ((__be16 *)skb->data)[(tag_len / 2) - 1]; 933 #endif 934 } 935 936 #if IS_ENABLED(CONFIG_NET_DSA) 937 static inline int __dsa_netdevice_ops_check(struct net_device *dev) 938 { 939 int err = -EOPNOTSUPP; 940 941 if (!dev->dsa_ptr) 942 return err; 943 944 if (!dev->dsa_ptr->netdev_ops) 945 return err; 946 947 return 0; 948 } 949 950 static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr, 951 int cmd) 952 { 953 const struct dsa_netdevice_ops *ops; 954 int err; 955 956 err = __dsa_netdevice_ops_check(dev); 957 if (err) 958 return err; 959 960 ops = dev->dsa_ptr->netdev_ops; 961 962 return ops->ndo_do_ioctl(dev, ifr, cmd); 963 } 964 #else 965 static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr, 966 int cmd) 967 { 968 return -EOPNOTSUPP; 969 } 970 #endif 971 972 void dsa_unregister_switch(struct dsa_switch *ds); 973 int dsa_register_switch(struct dsa_switch *ds); 974 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index); 975 #ifdef CONFIG_PM_SLEEP 976 int dsa_switch_suspend(struct dsa_switch *ds); 977 int dsa_switch_resume(struct dsa_switch *ds); 978 #else 979 static inline int dsa_switch_suspend(struct dsa_switch *ds) 980 { 981 return 0; 982 } 983 static inline int dsa_switch_resume(struct dsa_switch *ds) 984 { 985 return 0; 986 } 987 #endif /* CONFIG_PM_SLEEP */ 988 989 #if IS_ENABLED(CONFIG_NET_DSA) 990 bool dsa_slave_dev_check(const struct net_device *dev); 991 #else 992 static inline bool dsa_slave_dev_check(const struct net_device *dev) 993 { 994 return false; 995 } 996 #endif 997 998 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 999 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data); 1000 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data); 1001 int dsa_port_get_phy_sset_count(struct dsa_port *dp); 1002 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 1003 1004 struct dsa_tag_driver { 1005 const struct dsa_device_ops *ops; 1006 struct list_head list; 1007 struct module *owner; 1008 }; 1009 1010 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 1011 unsigned int count, 1012 struct module *owner); 1013 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 1014 unsigned int count); 1015 1016 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 1017 static int __init dsa_tag_driver_module_init(void) \ 1018 { \ 1019 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 1020 THIS_MODULE); \ 1021 return 0; \ 1022 } \ 1023 module_init(dsa_tag_driver_module_init); \ 1024 \ 1025 static void __exit dsa_tag_driver_module_exit(void) \ 1026 { \ 1027 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 1028 } \ 1029 module_exit(dsa_tag_driver_module_exit) 1030 1031 /** 1032 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 1033 * drivers 1034 * @__ops_array: Array of tag driver strucutres 1035 * 1036 * Helper macro for DSA tag drivers which do not do anything special 1037 * in module init/exit. Each module may only use this macro once, and 1038 * calling it replaces module_init() and module_exit(). 1039 */ 1040 #define module_dsa_tag_drivers(__ops_array) \ 1041 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 1042 1043 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 1044 1045 /* Create a static structure we can build a linked list of dsa_tag 1046 * drivers 1047 */ 1048 #define DSA_TAG_DRIVER(__ops) \ 1049 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 1050 .ops = &__ops, \ 1051 } 1052 1053 /** 1054 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 1055 * driver 1056 * @__ops: Single tag driver structures 1057 * 1058 * Helper macro for DSA tag drivers which do not do anything special 1059 * in module init/exit. Each module may only use this macro once, and 1060 * calling it replaces module_init() and module_exit(). 1061 */ 1062 #define module_dsa_tag_driver(__ops) \ 1063 DSA_TAG_DRIVER(__ops); \ 1064 \ 1065 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 1066 &DSA_TAG_DRIVER_NAME(__ops) \ 1067 }; \ 1068 module_dsa_tag_drivers(dsa_tag_driver_array) 1069 #endif 1070 1071