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 #define DSA_TAG_PROTO_SJA1110_VALUE 23 54 55 enum dsa_tag_protocol { 56 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, 57 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, 58 DSA_TAG_PROTO_BRCM_LEGACY = DSA_TAG_PROTO_BRCM_LEGACY_VALUE, 59 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, 60 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, 61 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, 62 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE, 63 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE, 64 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, 65 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, 66 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, 67 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, 68 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, 69 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, 70 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE, 71 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE, 72 DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE, 73 DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_VALUE, 74 DSA_TAG_PROTO_RTL4_A = DSA_TAG_PROTO_RTL4_A_VALUE, 75 DSA_TAG_PROTO_HELLCREEK = DSA_TAG_PROTO_HELLCREEK_VALUE, 76 DSA_TAG_PROTO_XRS700X = DSA_TAG_PROTO_XRS700X_VALUE, 77 DSA_TAG_PROTO_OCELOT_8021Q = DSA_TAG_PROTO_OCELOT_8021Q_VALUE, 78 DSA_TAG_PROTO_SEVILLE = DSA_TAG_PROTO_SEVILLE_VALUE, 79 DSA_TAG_PROTO_SJA1110 = DSA_TAG_PROTO_SJA1110_VALUE, 80 }; 81 82 struct packet_type; 83 struct dsa_switch; 84 85 struct dsa_device_ops { 86 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev); 87 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 88 struct packet_type *pt); 89 void (*flow_dissect)(const struct sk_buff *skb, __be16 *proto, 90 int *offset); 91 /* Used to determine which traffic should match the DSA filter in 92 * eth_type_trans, and which, if any, should bypass it and be processed 93 * as regular on the master net device. 94 */ 95 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 96 unsigned int needed_headroom; 97 unsigned int needed_tailroom; 98 const char *name; 99 enum dsa_tag_protocol proto; 100 /* Some tagging protocols either mangle or shift the destination MAC 101 * address, in which case the DSA master would drop packets on ingress 102 * if what it understands out of the destination MAC address is not in 103 * its RX filter. 104 */ 105 bool promisc_on_master; 106 }; 107 108 /* This structure defines the control interfaces that are overlayed by the 109 * DSA layer on top of the DSA CPU/management net_device instance. This is 110 * used by the core net_device layer while calling various net_device_ops 111 * function pointers. 112 */ 113 struct dsa_netdevice_ops { 114 int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, 115 int cmd); 116 }; 117 118 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-" 119 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \ 120 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE)) 121 122 struct dsa_switch_tree { 123 struct list_head list; 124 125 /* Notifier chain for switch-wide events */ 126 struct raw_notifier_head nh; 127 128 /* Tree identifier */ 129 unsigned int index; 130 131 /* Number of switches attached to this tree */ 132 struct kref refcount; 133 134 /* Has this tree been applied to the hardware? */ 135 bool setup; 136 137 /* Tagging protocol operations */ 138 const struct dsa_device_ops *tag_ops; 139 140 /* Default tagging protocol preferred by the switches in this 141 * tree. 142 */ 143 enum dsa_tag_protocol default_proto; 144 145 /* 146 * Configuration data for the platform device that owns 147 * this dsa switch tree instance. 148 */ 149 struct dsa_platform_data *pd; 150 151 /* List of switch ports */ 152 struct list_head ports; 153 154 /* List of DSA links composing the routing table */ 155 struct list_head rtable; 156 157 /* Maps offloaded LAG netdevs to a zero-based linear ID for 158 * drivers that need it. 159 */ 160 struct net_device **lags; 161 unsigned int lags_len; 162 }; 163 164 #define dsa_lags_foreach_id(_id, _dst) \ 165 for ((_id) = 0; (_id) < (_dst)->lags_len; (_id)++) \ 166 if ((_dst)->lags[(_id)]) 167 168 #define dsa_lag_foreach_port(_dp, _dst, _lag) \ 169 list_for_each_entry((_dp), &(_dst)->ports, list) \ 170 if ((_dp)->lag_dev == (_lag)) 171 172 #define dsa_hsr_foreach_port(_dp, _ds, _hsr) \ 173 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \ 174 if ((_dp)->ds == (_ds) && (_dp)->hsr_dev == (_hsr)) 175 176 static inline struct net_device *dsa_lag_dev(struct dsa_switch_tree *dst, 177 unsigned int id) 178 { 179 return dst->lags[id]; 180 } 181 182 static inline int dsa_lag_id(struct dsa_switch_tree *dst, 183 struct net_device *lag) 184 { 185 unsigned int id; 186 187 dsa_lags_foreach_id(id, dst) { 188 if (dsa_lag_dev(dst, id) == lag) 189 return id; 190 } 191 192 return -ENODEV; 193 } 194 195 /* TC matchall action types */ 196 enum dsa_port_mall_action_type { 197 DSA_PORT_MALL_MIRROR, 198 DSA_PORT_MALL_POLICER, 199 }; 200 201 /* TC mirroring entry */ 202 struct dsa_mall_mirror_tc_entry { 203 u8 to_local_port; 204 bool ingress; 205 }; 206 207 /* TC port policer entry */ 208 struct dsa_mall_policer_tc_entry { 209 u32 burst; 210 u64 rate_bytes_per_sec; 211 }; 212 213 /* TC matchall entry */ 214 struct dsa_mall_tc_entry { 215 struct list_head list; 216 unsigned long cookie; 217 enum dsa_port_mall_action_type type; 218 union { 219 struct dsa_mall_mirror_tc_entry mirror; 220 struct dsa_mall_policer_tc_entry policer; 221 }; 222 }; 223 224 225 struct dsa_port { 226 /* A CPU port is physically connected to a master device. 227 * A user port exposed to userspace has a slave device. 228 */ 229 union { 230 struct net_device *master; 231 struct net_device *slave; 232 }; 233 234 /* Copy of the tagging protocol operations, for quicker access 235 * in the data path. Valid only for the CPU ports. 236 */ 237 const struct dsa_device_ops *tag_ops; 238 239 /* Copies for faster access in master receive hot path */ 240 struct dsa_switch_tree *dst; 241 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 242 struct packet_type *pt); 243 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 244 245 enum { 246 DSA_PORT_TYPE_UNUSED = 0, 247 DSA_PORT_TYPE_CPU, 248 DSA_PORT_TYPE_DSA, 249 DSA_PORT_TYPE_USER, 250 } type; 251 252 struct dsa_switch *ds; 253 unsigned int index; 254 const char *name; 255 struct dsa_port *cpu_dp; 256 u8 mac[ETH_ALEN]; 257 struct device_node *dn; 258 unsigned int ageing_time; 259 bool vlan_filtering; 260 u8 stp_state; 261 struct net_device *bridge_dev; 262 struct devlink_port devlink_port; 263 bool devlink_port_setup; 264 struct phylink *pl; 265 struct phylink_config pl_config; 266 struct net_device *lag_dev; 267 bool lag_tx_enabled; 268 struct net_device *hsr_dev; 269 270 struct list_head list; 271 272 /* 273 * Give the switch driver somewhere to hang its per-port private data 274 * structures (accessible from the tagger). 275 */ 276 void *priv; 277 278 /* 279 * Original copy of the master netdev ethtool_ops 280 */ 281 const struct ethtool_ops *orig_ethtool_ops; 282 283 /* 284 * Original copy of the master netdev net_device_ops 285 */ 286 const struct dsa_netdevice_ops *netdev_ops; 287 288 bool setup; 289 }; 290 291 /* TODO: ideally DSA ports would have a single dp->link_dp member, 292 * and no dst->rtable nor this struct dsa_link would be needed, 293 * but this would require some more complex tree walking, 294 * so keep it stupid at the moment and list them all. 295 */ 296 struct dsa_link { 297 struct dsa_port *dp; 298 struct dsa_port *link_dp; 299 struct list_head list; 300 }; 301 302 struct dsa_switch { 303 bool setup; 304 305 struct device *dev; 306 307 /* 308 * Parent switch tree, and switch index. 309 */ 310 struct dsa_switch_tree *dst; 311 unsigned int index; 312 313 /* Listener for switch fabric events */ 314 struct notifier_block nb; 315 316 /* 317 * Give the switch driver somewhere to hang its private data 318 * structure. 319 */ 320 void *priv; 321 322 /* 323 * Configuration data for this switch. 324 */ 325 struct dsa_chip_data *cd; 326 327 /* 328 * The switch operations. 329 */ 330 const struct dsa_switch_ops *ops; 331 332 /* 333 * Slave mii_bus and devices for the individual ports. 334 */ 335 u32 phys_mii_mask; 336 struct mii_bus *slave_mii_bus; 337 338 /* Ageing Time limits in msecs */ 339 unsigned int ageing_time_min; 340 unsigned int ageing_time_max; 341 342 /* devlink used to represent this switch device */ 343 struct devlink *devlink; 344 345 /* Number of switch port queues */ 346 unsigned int num_tx_queues; 347 348 /* Disallow bridge core from requesting different VLAN awareness 349 * settings on ports if not hardware-supported 350 */ 351 bool vlan_filtering_is_global; 352 353 /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges 354 * that have vlan_filtering=0. All drivers should ideally set this (and 355 * then the option would get removed), but it is unknown whether this 356 * would break things or not. 357 */ 358 bool configure_vlan_while_not_filtering; 359 360 /* If the switch driver always programs the CPU port as egress tagged 361 * despite the VLAN configuration indicating otherwise, then setting 362 * @untag_bridge_pvid will force the DSA receive path to pop the bridge's 363 * default_pvid VLAN tagged frames to offer a consistent behavior 364 * between a vlan_filtering=0 and vlan_filtering=1 bridge device. 365 */ 366 bool untag_bridge_pvid; 367 368 /* Let DSA manage the FDB entries towards the CPU, based on the 369 * software bridge database. 370 */ 371 bool assisted_learning_on_cpu_port; 372 373 /* In case vlan_filtering_is_global is set, the VLAN awareness state 374 * should be retrieved from here and not from the per-port settings. 375 */ 376 bool vlan_filtering; 377 378 /* MAC PCS does not provide link state change interrupt, and requires 379 * polling. Flag passed on to PHYLINK. 380 */ 381 bool pcs_poll; 382 383 /* For switches that only have the MRU configurable. To ensure the 384 * configured MTU is not exceeded, normalization of MRU on all bridged 385 * interfaces is needed. 386 */ 387 bool mtu_enforcement_ingress; 388 389 /* Drivers that benefit from having an ID associated with each 390 * offloaded LAG should set this to the maximum number of 391 * supported IDs. DSA will then maintain a mapping of _at 392 * least_ these many IDs, accessible to drivers via 393 * dsa_lag_id(). 394 */ 395 unsigned int num_lag_ids; 396 397 size_t num_ports; 398 }; 399 400 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 401 { 402 struct dsa_switch_tree *dst = ds->dst; 403 struct dsa_port *dp; 404 405 list_for_each_entry(dp, &dst->ports, list) 406 if (dp->ds == ds && dp->index == p) 407 return dp; 408 409 return NULL; 410 } 411 412 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 413 { 414 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 415 } 416 417 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 418 { 419 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 420 } 421 422 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 423 { 424 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 425 } 426 427 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 428 { 429 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 430 } 431 432 static inline u32 dsa_user_ports(struct dsa_switch *ds) 433 { 434 u32 mask = 0; 435 int p; 436 437 for (p = 0; p < ds->num_ports; p++) 438 if (dsa_is_user_port(ds, p)) 439 mask |= BIT(p); 440 441 return mask; 442 } 443 444 /* Return the local port used to reach an arbitrary switch device */ 445 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device) 446 { 447 struct dsa_switch_tree *dst = ds->dst; 448 struct dsa_link *dl; 449 450 list_for_each_entry(dl, &dst->rtable, list) 451 if (dl->dp->ds == ds && dl->link_dp->ds->index == device) 452 return dl->dp->index; 453 454 return ds->num_ports; 455 } 456 457 /* Return the local port used to reach an arbitrary switch port */ 458 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 459 int port) 460 { 461 if (device == ds->index) 462 return port; 463 else 464 return dsa_routing_port(ds, device); 465 } 466 467 /* Return the local port used to reach the dedicated CPU port */ 468 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 469 { 470 const struct dsa_port *dp = dsa_to_port(ds, port); 471 const struct dsa_port *cpu_dp = dp->cpu_dp; 472 473 if (!cpu_dp) 474 return port; 475 476 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 477 } 478 479 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 480 { 481 const struct dsa_switch *ds = dp->ds; 482 483 if (ds->vlan_filtering_is_global) 484 return ds->vlan_filtering; 485 else 486 return dp->vlan_filtering; 487 } 488 489 static inline 490 struct net_device *dsa_port_to_bridge_port(const struct dsa_port *dp) 491 { 492 if (!dp->bridge_dev) 493 return NULL; 494 495 if (dp->lag_dev) 496 return dp->lag_dev; 497 else if (dp->hsr_dev) 498 return dp->hsr_dev; 499 500 return dp->slave; 501 } 502 503 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 504 bool is_static, void *data); 505 struct dsa_switch_ops { 506 /* 507 * Tagging protocol helpers called for the CPU ports and DSA links. 508 * @get_tag_protocol retrieves the initial tagging protocol and is 509 * mandatory. Switches which can operate using multiple tagging 510 * protocols should implement @change_tag_protocol and report in 511 * @get_tag_protocol the tagger in current use. 512 */ 513 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 514 int port, 515 enum dsa_tag_protocol mprot); 516 int (*change_tag_protocol)(struct dsa_switch *ds, int port, 517 enum dsa_tag_protocol proto); 518 519 int (*setup)(struct dsa_switch *ds); 520 void (*teardown)(struct dsa_switch *ds); 521 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 522 523 /* 524 * Access to the switch's PHY registers. 525 */ 526 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 527 int (*phy_write)(struct dsa_switch *ds, int port, 528 int regnum, u16 val); 529 530 /* 531 * Link state adjustment (called from libphy) 532 */ 533 void (*adjust_link)(struct dsa_switch *ds, int port, 534 struct phy_device *phydev); 535 void (*fixed_link_update)(struct dsa_switch *ds, int port, 536 struct fixed_phy_status *st); 537 538 /* 539 * PHYLINK integration 540 */ 541 void (*phylink_validate)(struct dsa_switch *ds, int port, 542 unsigned long *supported, 543 struct phylink_link_state *state); 544 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 545 struct phylink_link_state *state); 546 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 547 unsigned int mode, 548 const struct phylink_link_state *state); 549 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 550 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 551 unsigned int mode, 552 phy_interface_t interface); 553 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 554 unsigned int mode, 555 phy_interface_t interface, 556 struct phy_device *phydev, 557 int speed, int duplex, 558 bool tx_pause, bool rx_pause); 559 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 560 struct phylink_link_state *state); 561 /* 562 * Port statistics counters. 563 */ 564 void (*get_strings)(struct dsa_switch *ds, int port, 565 u32 stringset, uint8_t *data); 566 void (*get_ethtool_stats)(struct dsa_switch *ds, 567 int port, uint64_t *data); 568 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 569 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 570 int port, uint64_t *data); 571 void (*get_stats64)(struct dsa_switch *ds, int port, 572 struct rtnl_link_stats64 *s); 573 void (*self_test)(struct dsa_switch *ds, int port, 574 struct ethtool_test *etest, u64 *data); 575 576 /* 577 * ethtool Wake-on-LAN 578 */ 579 void (*get_wol)(struct dsa_switch *ds, int port, 580 struct ethtool_wolinfo *w); 581 int (*set_wol)(struct dsa_switch *ds, int port, 582 struct ethtool_wolinfo *w); 583 584 /* 585 * ethtool timestamp info 586 */ 587 int (*get_ts_info)(struct dsa_switch *ds, int port, 588 struct ethtool_ts_info *ts); 589 590 /* 591 * Suspend and resume 592 */ 593 int (*suspend)(struct dsa_switch *ds); 594 int (*resume)(struct dsa_switch *ds); 595 596 /* 597 * Port enable/disable 598 */ 599 int (*port_enable)(struct dsa_switch *ds, int port, 600 struct phy_device *phy); 601 void (*port_disable)(struct dsa_switch *ds, int port); 602 603 /* 604 * Port's MAC EEE settings 605 */ 606 int (*set_mac_eee)(struct dsa_switch *ds, int port, 607 struct ethtool_eee *e); 608 int (*get_mac_eee)(struct dsa_switch *ds, int port, 609 struct ethtool_eee *e); 610 611 /* EEPROM access */ 612 int (*get_eeprom_len)(struct dsa_switch *ds); 613 int (*get_eeprom)(struct dsa_switch *ds, 614 struct ethtool_eeprom *eeprom, u8 *data); 615 int (*set_eeprom)(struct dsa_switch *ds, 616 struct ethtool_eeprom *eeprom, u8 *data); 617 618 /* 619 * Register access. 620 */ 621 int (*get_regs_len)(struct dsa_switch *ds, int port); 622 void (*get_regs)(struct dsa_switch *ds, int port, 623 struct ethtool_regs *regs, void *p); 624 625 /* 626 * Upper device tracking. 627 */ 628 int (*port_prechangeupper)(struct dsa_switch *ds, int port, 629 struct netdev_notifier_changeupper_info *info); 630 631 /* 632 * Bridge integration 633 */ 634 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 635 int (*port_bridge_join)(struct dsa_switch *ds, int port, 636 struct net_device *bridge); 637 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 638 struct net_device *bridge); 639 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 640 u8 state); 641 void (*port_fast_age)(struct dsa_switch *ds, int port); 642 int (*port_pre_bridge_flags)(struct dsa_switch *ds, int port, 643 struct switchdev_brport_flags flags, 644 struct netlink_ext_ack *extack); 645 int (*port_bridge_flags)(struct dsa_switch *ds, int port, 646 struct switchdev_brport_flags flags, 647 struct netlink_ext_ack *extack); 648 int (*port_set_mrouter)(struct dsa_switch *ds, int port, bool mrouter, 649 struct netlink_ext_ack *extack); 650 651 /* 652 * VLAN support 653 */ 654 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 655 bool vlan_filtering, 656 struct netlink_ext_ack *extack); 657 int (*port_vlan_add)(struct dsa_switch *ds, int port, 658 const struct switchdev_obj_port_vlan *vlan, 659 struct netlink_ext_ack *extack); 660 int (*port_vlan_del)(struct dsa_switch *ds, int port, 661 const struct switchdev_obj_port_vlan *vlan); 662 /* 663 * Forwarding database 664 */ 665 int (*port_fdb_add)(struct dsa_switch *ds, int port, 666 const unsigned char *addr, u16 vid); 667 int (*port_fdb_del)(struct dsa_switch *ds, int port, 668 const unsigned char *addr, u16 vid); 669 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 670 dsa_fdb_dump_cb_t *cb, void *data); 671 672 /* 673 * Multicast database 674 */ 675 int (*port_mdb_add)(struct dsa_switch *ds, int port, 676 const struct switchdev_obj_port_mdb *mdb); 677 int (*port_mdb_del)(struct dsa_switch *ds, int port, 678 const struct switchdev_obj_port_mdb *mdb); 679 /* 680 * RXNFC 681 */ 682 int (*get_rxnfc)(struct dsa_switch *ds, int port, 683 struct ethtool_rxnfc *nfc, u32 *rule_locs); 684 int (*set_rxnfc)(struct dsa_switch *ds, int port, 685 struct ethtool_rxnfc *nfc); 686 687 /* 688 * TC integration 689 */ 690 int (*cls_flower_add)(struct dsa_switch *ds, int port, 691 struct flow_cls_offload *cls, bool ingress); 692 int (*cls_flower_del)(struct dsa_switch *ds, int port, 693 struct flow_cls_offload *cls, bool ingress); 694 int (*cls_flower_stats)(struct dsa_switch *ds, int port, 695 struct flow_cls_offload *cls, bool ingress); 696 int (*port_mirror_add)(struct dsa_switch *ds, int port, 697 struct dsa_mall_mirror_tc_entry *mirror, 698 bool ingress); 699 void (*port_mirror_del)(struct dsa_switch *ds, int port, 700 struct dsa_mall_mirror_tc_entry *mirror); 701 int (*port_policer_add)(struct dsa_switch *ds, int port, 702 struct dsa_mall_policer_tc_entry *policer); 703 void (*port_policer_del)(struct dsa_switch *ds, int port); 704 int (*port_setup_tc)(struct dsa_switch *ds, int port, 705 enum tc_setup_type type, void *type_data); 706 707 /* 708 * Cross-chip operations 709 */ 710 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index, 711 int sw_index, int port, 712 struct net_device *br); 713 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index, 714 int sw_index, int port, 715 struct net_device *br); 716 int (*crosschip_lag_change)(struct dsa_switch *ds, int sw_index, 717 int port); 718 int (*crosschip_lag_join)(struct dsa_switch *ds, int sw_index, 719 int port, struct net_device *lag, 720 struct netdev_lag_upper_info *info); 721 int (*crosschip_lag_leave)(struct dsa_switch *ds, int sw_index, 722 int port, struct net_device *lag); 723 724 /* 725 * PTP functionality 726 */ 727 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 728 struct ifreq *ifr); 729 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 730 struct ifreq *ifr); 731 void (*port_txtstamp)(struct dsa_switch *ds, int port, 732 struct sk_buff *skb); 733 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 734 struct sk_buff *skb, unsigned int type); 735 736 /* Devlink parameters, etc */ 737 int (*devlink_param_get)(struct dsa_switch *ds, u32 id, 738 struct devlink_param_gset_ctx *ctx); 739 int (*devlink_param_set)(struct dsa_switch *ds, u32 id, 740 struct devlink_param_gset_ctx *ctx); 741 int (*devlink_info_get)(struct dsa_switch *ds, 742 struct devlink_info_req *req, 743 struct netlink_ext_ack *extack); 744 int (*devlink_sb_pool_get)(struct dsa_switch *ds, 745 unsigned int sb_index, u16 pool_index, 746 struct devlink_sb_pool_info *pool_info); 747 int (*devlink_sb_pool_set)(struct dsa_switch *ds, unsigned int sb_index, 748 u16 pool_index, u32 size, 749 enum devlink_sb_threshold_type threshold_type, 750 struct netlink_ext_ack *extack); 751 int (*devlink_sb_port_pool_get)(struct dsa_switch *ds, int port, 752 unsigned int sb_index, u16 pool_index, 753 u32 *p_threshold); 754 int (*devlink_sb_port_pool_set)(struct dsa_switch *ds, int port, 755 unsigned int sb_index, u16 pool_index, 756 u32 threshold, 757 struct netlink_ext_ack *extack); 758 int (*devlink_sb_tc_pool_bind_get)(struct dsa_switch *ds, int port, 759 unsigned int sb_index, u16 tc_index, 760 enum devlink_sb_pool_type pool_type, 761 u16 *p_pool_index, u32 *p_threshold); 762 int (*devlink_sb_tc_pool_bind_set)(struct dsa_switch *ds, int port, 763 unsigned int sb_index, u16 tc_index, 764 enum devlink_sb_pool_type pool_type, 765 u16 pool_index, u32 threshold, 766 struct netlink_ext_ack *extack); 767 int (*devlink_sb_occ_snapshot)(struct dsa_switch *ds, 768 unsigned int sb_index); 769 int (*devlink_sb_occ_max_clear)(struct dsa_switch *ds, 770 unsigned int sb_index); 771 int (*devlink_sb_occ_port_pool_get)(struct dsa_switch *ds, int port, 772 unsigned int sb_index, u16 pool_index, 773 u32 *p_cur, u32 *p_max); 774 int (*devlink_sb_occ_tc_port_bind_get)(struct dsa_switch *ds, int port, 775 unsigned int sb_index, u16 tc_index, 776 enum devlink_sb_pool_type pool_type, 777 u32 *p_cur, u32 *p_max); 778 779 /* 780 * MTU change functionality. Switches can also adjust their MRU through 781 * this method. By MTU, one understands the SDU (L2 payload) length. 782 * If the switch needs to account for the DSA tag on the CPU port, this 783 * method needs to do so privately. 784 */ 785 int (*port_change_mtu)(struct dsa_switch *ds, int port, 786 int new_mtu); 787 int (*port_max_mtu)(struct dsa_switch *ds, int port); 788 789 /* 790 * LAG integration 791 */ 792 int (*port_lag_change)(struct dsa_switch *ds, int port); 793 int (*port_lag_join)(struct dsa_switch *ds, int port, 794 struct net_device *lag, 795 struct netdev_lag_upper_info *info); 796 int (*port_lag_leave)(struct dsa_switch *ds, int port, 797 struct net_device *lag); 798 799 /* 800 * HSR integration 801 */ 802 int (*port_hsr_join)(struct dsa_switch *ds, int port, 803 struct net_device *hsr); 804 int (*port_hsr_leave)(struct dsa_switch *ds, int port, 805 struct net_device *hsr); 806 807 /* 808 * MRP integration 809 */ 810 int (*port_mrp_add)(struct dsa_switch *ds, int port, 811 const struct switchdev_obj_mrp *mrp); 812 int (*port_mrp_del)(struct dsa_switch *ds, int port, 813 const struct switchdev_obj_mrp *mrp); 814 int (*port_mrp_add_ring_role)(struct dsa_switch *ds, int port, 815 const struct switchdev_obj_ring_role_mrp *mrp); 816 int (*port_mrp_del_ring_role)(struct dsa_switch *ds, int port, 817 const struct switchdev_obj_ring_role_mrp *mrp); 818 }; 819 820 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \ 821 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \ 822 dsa_devlink_param_get, dsa_devlink_param_set, NULL) 823 824 int dsa_devlink_param_get(struct devlink *dl, u32 id, 825 struct devlink_param_gset_ctx *ctx); 826 int dsa_devlink_param_set(struct devlink *dl, u32 id, 827 struct devlink_param_gset_ctx *ctx); 828 int dsa_devlink_params_register(struct dsa_switch *ds, 829 const struct devlink_param *params, 830 size_t params_count); 831 void dsa_devlink_params_unregister(struct dsa_switch *ds, 832 const struct devlink_param *params, 833 size_t params_count); 834 int dsa_devlink_resource_register(struct dsa_switch *ds, 835 const char *resource_name, 836 u64 resource_size, 837 u64 resource_id, 838 u64 parent_resource_id, 839 const struct devlink_resource_size_params *size_params); 840 841 void dsa_devlink_resources_unregister(struct dsa_switch *ds); 842 843 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds, 844 u64 resource_id, 845 devlink_resource_occ_get_t *occ_get, 846 void *occ_get_priv); 847 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds, 848 u64 resource_id); 849 struct devlink_region * 850 dsa_devlink_region_create(struct dsa_switch *ds, 851 const struct devlink_region_ops *ops, 852 u32 region_max_snapshots, u64 region_size); 853 struct devlink_region * 854 dsa_devlink_port_region_create(struct dsa_switch *ds, 855 int port, 856 const struct devlink_port_region_ops *ops, 857 u32 region_max_snapshots, u64 region_size); 858 void dsa_devlink_region_destroy(struct devlink_region *region); 859 860 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev); 861 862 struct dsa_devlink_priv { 863 struct dsa_switch *ds; 864 }; 865 866 static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl) 867 { 868 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 869 870 return dl_priv->ds; 871 } 872 873 static inline 874 struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port) 875 { 876 struct devlink *dl = port->devlink; 877 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 878 879 return dl_priv->ds; 880 } 881 882 static inline int dsa_devlink_port_to_port(struct devlink_port *port) 883 { 884 return port->index; 885 } 886 887 struct dsa_switch_driver { 888 struct list_head list; 889 const struct dsa_switch_ops *ops; 890 }; 891 892 struct net_device *dsa_dev_to_net_device(struct device *dev); 893 894 /* Keep inline for faster access in hot path */ 895 static inline bool netdev_uses_dsa(const struct net_device *dev) 896 { 897 #if IS_ENABLED(CONFIG_NET_DSA) 898 return dev->dsa_ptr && dev->dsa_ptr->rcv; 899 #endif 900 return false; 901 } 902 903 static inline bool dsa_can_decode(const struct sk_buff *skb, 904 struct net_device *dev) 905 { 906 #if IS_ENABLED(CONFIG_NET_DSA) 907 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev); 908 #endif 909 return false; 910 } 911 912 /* All DSA tags that push the EtherType to the right (basically all except tail 913 * tags, which don't break dissection) can be treated the same from the 914 * perspective of the flow dissector. 915 * 916 * We need to return: 917 * - offset: the (B - A) difference between: 918 * A. the position of the real EtherType and 919 * B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes 920 * after the normal EtherType was supposed to be) 921 * The offset in bytes is exactly equal to the tagger overhead (and half of 922 * that, in __be16 shorts). 923 * 924 * - proto: the value of the real EtherType. 925 */ 926 static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb, 927 __be16 *proto, int *offset) 928 { 929 #if IS_ENABLED(CONFIG_NET_DSA) 930 const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops; 931 int tag_len = ops->needed_headroom; 932 933 *offset = tag_len; 934 *proto = ((__be16 *)skb->data)[(tag_len / 2) - 1]; 935 #endif 936 } 937 938 #if IS_ENABLED(CONFIG_NET_DSA) 939 static inline int __dsa_netdevice_ops_check(struct net_device *dev) 940 { 941 int err = -EOPNOTSUPP; 942 943 if (!dev->dsa_ptr) 944 return err; 945 946 if (!dev->dsa_ptr->netdev_ops) 947 return err; 948 949 return 0; 950 } 951 952 static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr, 953 int cmd) 954 { 955 const struct dsa_netdevice_ops *ops; 956 int err; 957 958 err = __dsa_netdevice_ops_check(dev); 959 if (err) 960 return err; 961 962 ops = dev->dsa_ptr->netdev_ops; 963 964 return ops->ndo_do_ioctl(dev, ifr, cmd); 965 } 966 #else 967 static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr, 968 int cmd) 969 { 970 return -EOPNOTSUPP; 971 } 972 #endif 973 974 void dsa_unregister_switch(struct dsa_switch *ds); 975 int dsa_register_switch(struct dsa_switch *ds); 976 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index); 977 #ifdef CONFIG_PM_SLEEP 978 int dsa_switch_suspend(struct dsa_switch *ds); 979 int dsa_switch_resume(struct dsa_switch *ds); 980 #else 981 static inline int dsa_switch_suspend(struct dsa_switch *ds) 982 { 983 return 0; 984 } 985 static inline int dsa_switch_resume(struct dsa_switch *ds) 986 { 987 return 0; 988 } 989 #endif /* CONFIG_PM_SLEEP */ 990 991 #if IS_ENABLED(CONFIG_NET_DSA) 992 bool dsa_slave_dev_check(const struct net_device *dev); 993 #else 994 static inline bool dsa_slave_dev_check(const struct net_device *dev) 995 { 996 return false; 997 } 998 #endif 999 1000 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 1001 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data); 1002 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data); 1003 int dsa_port_get_phy_sset_count(struct dsa_port *dp); 1004 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 1005 1006 struct dsa_tag_driver { 1007 const struct dsa_device_ops *ops; 1008 struct list_head list; 1009 struct module *owner; 1010 }; 1011 1012 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 1013 unsigned int count, 1014 struct module *owner); 1015 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 1016 unsigned int count); 1017 1018 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 1019 static int __init dsa_tag_driver_module_init(void) \ 1020 { \ 1021 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 1022 THIS_MODULE); \ 1023 return 0; \ 1024 } \ 1025 module_init(dsa_tag_driver_module_init); \ 1026 \ 1027 static void __exit dsa_tag_driver_module_exit(void) \ 1028 { \ 1029 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 1030 } \ 1031 module_exit(dsa_tag_driver_module_exit) 1032 1033 /** 1034 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 1035 * drivers 1036 * @__ops_array: Array of tag driver strucutres 1037 * 1038 * Helper macro for DSA tag drivers which do not do anything special 1039 * in module init/exit. Each module may only use this macro once, and 1040 * calling it replaces module_init() and module_exit(). 1041 */ 1042 #define module_dsa_tag_drivers(__ops_array) \ 1043 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 1044 1045 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 1046 1047 /* Create a static structure we can build a linked list of dsa_tag 1048 * drivers 1049 */ 1050 #define DSA_TAG_DRIVER(__ops) \ 1051 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 1052 .ops = &__ops, \ 1053 } 1054 1055 /** 1056 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 1057 * driver 1058 * @__ops: Single tag driver structures 1059 * 1060 * Helper macro for DSA tag drivers which do not do anything special 1061 * in module init/exit. Each module may only use this macro once, and 1062 * calling it replaces module_init() and module_exit(). 1063 */ 1064 #define module_dsa_tag_driver(__ops) \ 1065 DSA_TAG_DRIVER(__ops); \ 1066 \ 1067 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 1068 &DSA_TAG_DRIVER_NAME(__ops) \ 1069 }; \ 1070 module_dsa_tag_drivers(dsa_tag_driver_array) 1071 #endif 1072 1073