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 52 enum dsa_tag_protocol { 53 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, 54 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, 55 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, 56 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, 57 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, 58 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE, 59 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE, 60 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, 61 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, 62 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, 63 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, 64 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, 65 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, 66 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE, 67 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE, 68 DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE, 69 DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_VALUE, 70 DSA_TAG_PROTO_RTL4_A = DSA_TAG_PROTO_RTL4_A_VALUE, 71 DSA_TAG_PROTO_HELLCREEK = DSA_TAG_PROTO_HELLCREEK_VALUE, 72 DSA_TAG_PROTO_XRS700X = DSA_TAG_PROTO_XRS700X_VALUE, 73 DSA_TAG_PROTO_OCELOT_8021Q = DSA_TAG_PROTO_OCELOT_8021Q_VALUE, 74 }; 75 76 struct packet_type; 77 struct dsa_switch; 78 79 struct dsa_device_ops { 80 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev); 81 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 82 struct packet_type *pt); 83 void (*flow_dissect)(const struct sk_buff *skb, __be16 *proto, 84 int *offset); 85 /* Used to determine which traffic should match the DSA filter in 86 * eth_type_trans, and which, if any, should bypass it and be processed 87 * as regular on the master net device. 88 */ 89 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 90 unsigned int overhead; 91 const char *name; 92 enum dsa_tag_protocol proto; 93 /* Some tagging protocols either mangle or shift the destination MAC 94 * address, in which case the DSA master would drop packets on ingress 95 * if what it understands out of the destination MAC address is not in 96 * its RX filter. 97 */ 98 bool promisc_on_master; 99 bool tail_tag; 100 }; 101 102 /* This structure defines the control interfaces that are overlayed by the 103 * DSA layer on top of the DSA CPU/management net_device instance. This is 104 * used by the core net_device layer while calling various net_device_ops 105 * function pointers. 106 */ 107 struct dsa_netdevice_ops { 108 int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, 109 int cmd); 110 }; 111 112 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-" 113 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \ 114 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE)) 115 116 struct dsa_skb_cb { 117 struct sk_buff *clone; 118 }; 119 120 struct __dsa_skb_cb { 121 struct dsa_skb_cb cb; 122 u8 priv[48 - sizeof(struct dsa_skb_cb)]; 123 }; 124 125 #define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb)) 126 127 #define DSA_SKB_CB_PRIV(skb) \ 128 ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv)) 129 130 struct dsa_switch_tree { 131 struct list_head list; 132 133 /* Notifier chain for switch-wide events */ 134 struct raw_notifier_head nh; 135 136 /* Tree identifier */ 137 unsigned int index; 138 139 /* Number of switches attached to this tree */ 140 struct kref refcount; 141 142 /* Has this tree been applied to the hardware? */ 143 bool setup; 144 145 /* Tagging protocol operations */ 146 const struct dsa_device_ops *tag_ops; 147 148 /* 149 * Configuration data for the platform device that owns 150 * this dsa switch tree instance. 151 */ 152 struct dsa_platform_data *pd; 153 154 /* List of switch ports */ 155 struct list_head ports; 156 157 /* List of DSA links composing the routing table */ 158 struct list_head rtable; 159 160 /* Maps offloaded LAG netdevs to a zero-based linear ID for 161 * drivers that need it. 162 */ 163 struct net_device **lags; 164 unsigned int lags_len; 165 }; 166 167 #define dsa_lags_foreach_id(_id, _dst) \ 168 for ((_id) = 0; (_id) < (_dst)->lags_len; (_id)++) \ 169 if ((_dst)->lags[(_id)]) 170 171 #define dsa_lag_foreach_port(_dp, _dst, _lag) \ 172 list_for_each_entry((_dp), &(_dst)->ports, list) \ 173 if ((_dp)->lag_dev == (_lag)) 174 175 #define dsa_hsr_foreach_port(_dp, _ds, _hsr) \ 176 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \ 177 if ((_dp)->ds == (_ds) && (_dp)->hsr_dev == (_hsr)) 178 179 static inline struct net_device *dsa_lag_dev(struct dsa_switch_tree *dst, 180 unsigned int id) 181 { 182 return dst->lags[id]; 183 } 184 185 static inline int dsa_lag_id(struct dsa_switch_tree *dst, 186 struct net_device *lag) 187 { 188 unsigned int id; 189 190 dsa_lags_foreach_id(id, dst) { 191 if (dsa_lag_dev(dst, id) == lag) 192 return id; 193 } 194 195 return -ENODEV; 196 } 197 198 /* TC matchall action types */ 199 enum dsa_port_mall_action_type { 200 DSA_PORT_MALL_MIRROR, 201 DSA_PORT_MALL_POLICER, 202 }; 203 204 /* TC mirroring entry */ 205 struct dsa_mall_mirror_tc_entry { 206 u8 to_local_port; 207 bool ingress; 208 }; 209 210 /* TC port policer entry */ 211 struct dsa_mall_policer_tc_entry { 212 u32 burst; 213 u64 rate_bytes_per_sec; 214 }; 215 216 /* TC matchall entry */ 217 struct dsa_mall_tc_entry { 218 struct list_head list; 219 unsigned long cookie; 220 enum dsa_port_mall_action_type type; 221 union { 222 struct dsa_mall_mirror_tc_entry mirror; 223 struct dsa_mall_policer_tc_entry policer; 224 }; 225 }; 226 227 228 struct dsa_port { 229 /* A CPU port is physically connected to a master device. 230 * A user port exposed to userspace has a slave device. 231 */ 232 union { 233 struct net_device *master; 234 struct net_device *slave; 235 }; 236 237 /* Copy of the tagging protocol operations, for quicker access 238 * in the data path. Valid only for the CPU ports. 239 */ 240 const struct dsa_device_ops *tag_ops; 241 242 /* Copies for faster access in master receive hot path */ 243 struct dsa_switch_tree *dst; 244 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 245 struct packet_type *pt); 246 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 247 248 enum { 249 DSA_PORT_TYPE_UNUSED = 0, 250 DSA_PORT_TYPE_CPU, 251 DSA_PORT_TYPE_DSA, 252 DSA_PORT_TYPE_USER, 253 } type; 254 255 struct dsa_switch *ds; 256 unsigned int index; 257 const char *name; 258 struct dsa_port *cpu_dp; 259 const char *mac; 260 struct device_node *dn; 261 unsigned int ageing_time; 262 bool vlan_filtering; 263 u8 stp_state; 264 struct net_device *bridge_dev; 265 struct devlink_port devlink_port; 266 bool devlink_port_setup; 267 struct phylink *pl; 268 struct phylink_config pl_config; 269 struct net_device *lag_dev; 270 bool lag_tx_enabled; 271 struct net_device *hsr_dev; 272 273 struct list_head list; 274 275 /* 276 * Give the switch driver somewhere to hang its per-port private data 277 * structures (accessible from the tagger). 278 */ 279 void *priv; 280 281 /* 282 * Original copy of the master netdev ethtool_ops 283 */ 284 const struct ethtool_ops *orig_ethtool_ops; 285 286 /* 287 * Original copy of the master netdev net_device_ops 288 */ 289 const struct dsa_netdevice_ops *netdev_ops; 290 291 bool setup; 292 }; 293 294 /* TODO: ideally DSA ports would have a single dp->link_dp member, 295 * and no dst->rtable nor this struct dsa_link would be needed, 296 * but this would require some more complex tree walking, 297 * so keep it stupid at the moment and list them all. 298 */ 299 struct dsa_link { 300 struct dsa_port *dp; 301 struct dsa_port *link_dp; 302 struct list_head list; 303 }; 304 305 struct dsa_switch { 306 bool setup; 307 308 struct device *dev; 309 310 /* 311 * Parent switch tree, and switch index. 312 */ 313 struct dsa_switch_tree *dst; 314 unsigned int index; 315 316 /* Listener for switch fabric events */ 317 struct notifier_block nb; 318 319 /* 320 * Give the switch driver somewhere to hang its private data 321 * structure. 322 */ 323 void *priv; 324 325 /* 326 * Configuration data for this switch. 327 */ 328 struct dsa_chip_data *cd; 329 330 /* 331 * The switch operations. 332 */ 333 const struct dsa_switch_ops *ops; 334 335 /* 336 * Slave mii_bus and devices for the individual ports. 337 */ 338 u32 phys_mii_mask; 339 struct mii_bus *slave_mii_bus; 340 341 /* Ageing Time limits in msecs */ 342 unsigned int ageing_time_min; 343 unsigned int ageing_time_max; 344 345 /* devlink used to represent this switch device */ 346 struct devlink *devlink; 347 348 /* Number of switch port queues */ 349 unsigned int num_tx_queues; 350 351 /* Disallow bridge core from requesting different VLAN awareness 352 * settings on ports if not hardware-supported 353 */ 354 bool vlan_filtering_is_global; 355 356 /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges 357 * that have vlan_filtering=0. All drivers should ideally set this (and 358 * then the option would get removed), but it is unknown whether this 359 * would break things or not. 360 */ 361 bool configure_vlan_while_not_filtering; 362 363 /* If the switch driver always programs the CPU port as egress tagged 364 * despite the VLAN configuration indicating otherwise, then setting 365 * @untag_bridge_pvid will force the DSA receive path to pop the bridge's 366 * default_pvid VLAN tagged frames to offer a consistent behavior 367 * between a vlan_filtering=0 and vlan_filtering=1 bridge device. 368 */ 369 bool untag_bridge_pvid; 370 371 /* Let DSA manage the FDB entries towards the CPU, based on the 372 * software bridge database. 373 */ 374 bool assisted_learning_on_cpu_port; 375 376 /* In case vlan_filtering_is_global is set, the VLAN awareness state 377 * should be retrieved from here and not from the per-port settings. 378 */ 379 bool vlan_filtering; 380 381 /* MAC PCS does not provide link state change interrupt, and requires 382 * polling. Flag passed on to PHYLINK. 383 */ 384 bool pcs_poll; 385 386 /* For switches that only have the MRU configurable. To ensure the 387 * configured MTU is not exceeded, normalization of MRU on all bridged 388 * interfaces is needed. 389 */ 390 bool mtu_enforcement_ingress; 391 392 /* Drivers that benefit from having an ID associated with each 393 * offloaded LAG should set this to the maximum number of 394 * supported IDs. DSA will then maintain a mapping of _at 395 * least_ these many IDs, accessible to drivers via 396 * dsa_lag_id(). 397 */ 398 unsigned int num_lag_ids; 399 400 size_t num_ports; 401 }; 402 403 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 404 { 405 struct dsa_switch_tree *dst = ds->dst; 406 struct dsa_port *dp; 407 408 list_for_each_entry(dp, &dst->ports, list) 409 if (dp->ds == ds && dp->index == p) 410 return dp; 411 412 return NULL; 413 } 414 415 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 416 { 417 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 418 } 419 420 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 421 { 422 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 423 } 424 425 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 426 { 427 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 428 } 429 430 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 431 { 432 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 433 } 434 435 static inline u32 dsa_user_ports(struct dsa_switch *ds) 436 { 437 u32 mask = 0; 438 int p; 439 440 for (p = 0; p < ds->num_ports; p++) 441 if (dsa_is_user_port(ds, p)) 442 mask |= BIT(p); 443 444 return mask; 445 } 446 447 /* Return the local port used to reach an arbitrary switch device */ 448 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device) 449 { 450 struct dsa_switch_tree *dst = ds->dst; 451 struct dsa_link *dl; 452 453 list_for_each_entry(dl, &dst->rtable, list) 454 if (dl->dp->ds == ds && dl->link_dp->ds->index == device) 455 return dl->dp->index; 456 457 return ds->num_ports; 458 } 459 460 /* Return the local port used to reach an arbitrary switch port */ 461 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 462 int port) 463 { 464 if (device == ds->index) 465 return port; 466 else 467 return dsa_routing_port(ds, device); 468 } 469 470 /* Return the local port used to reach the dedicated CPU port */ 471 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 472 { 473 const struct dsa_port *dp = dsa_to_port(ds, port); 474 const struct dsa_port *cpu_dp = dp->cpu_dp; 475 476 if (!cpu_dp) 477 return port; 478 479 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 480 } 481 482 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 483 { 484 const struct dsa_switch *ds = dp->ds; 485 486 if (ds->vlan_filtering_is_global) 487 return ds->vlan_filtering; 488 else 489 return dp->vlan_filtering; 490 } 491 492 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 493 bool is_static, void *data); 494 struct dsa_switch_ops { 495 /* 496 * Tagging protocol helpers called for the CPU ports and DSA links. 497 * @get_tag_protocol retrieves the initial tagging protocol and is 498 * mandatory. Switches which can operate using multiple tagging 499 * protocols should implement @change_tag_protocol and report in 500 * @get_tag_protocol the tagger in current use. 501 */ 502 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 503 int port, 504 enum dsa_tag_protocol mprot); 505 int (*change_tag_protocol)(struct dsa_switch *ds, int port, 506 enum dsa_tag_protocol proto); 507 508 int (*setup)(struct dsa_switch *ds); 509 void (*teardown)(struct dsa_switch *ds); 510 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 511 512 /* 513 * Access to the switch's PHY registers. 514 */ 515 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 516 int (*phy_write)(struct dsa_switch *ds, int port, 517 int regnum, u16 val); 518 519 /* 520 * Link state adjustment (called from libphy) 521 */ 522 void (*adjust_link)(struct dsa_switch *ds, int port, 523 struct phy_device *phydev); 524 void (*fixed_link_update)(struct dsa_switch *ds, int port, 525 struct fixed_phy_status *st); 526 527 /* 528 * PHYLINK integration 529 */ 530 void (*phylink_validate)(struct dsa_switch *ds, int port, 531 unsigned long *supported, 532 struct phylink_link_state *state); 533 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 534 struct phylink_link_state *state); 535 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 536 unsigned int mode, 537 const struct phylink_link_state *state); 538 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 539 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 540 unsigned int mode, 541 phy_interface_t interface); 542 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 543 unsigned int mode, 544 phy_interface_t interface, 545 struct phy_device *phydev, 546 int speed, int duplex, 547 bool tx_pause, bool rx_pause); 548 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 549 struct phylink_link_state *state); 550 /* 551 * Port statistics counters. 552 */ 553 void (*get_strings)(struct dsa_switch *ds, int port, 554 u32 stringset, uint8_t *data); 555 void (*get_ethtool_stats)(struct dsa_switch *ds, 556 int port, uint64_t *data); 557 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 558 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 559 int port, uint64_t *data); 560 void (*get_stats64)(struct dsa_switch *ds, int port, 561 struct rtnl_link_stats64 *s); 562 563 /* 564 * ethtool Wake-on-LAN 565 */ 566 void (*get_wol)(struct dsa_switch *ds, int port, 567 struct ethtool_wolinfo *w); 568 int (*set_wol)(struct dsa_switch *ds, int port, 569 struct ethtool_wolinfo *w); 570 571 /* 572 * ethtool timestamp info 573 */ 574 int (*get_ts_info)(struct dsa_switch *ds, int port, 575 struct ethtool_ts_info *ts); 576 577 /* 578 * Suspend and resume 579 */ 580 int (*suspend)(struct dsa_switch *ds); 581 int (*resume)(struct dsa_switch *ds); 582 583 /* 584 * Port enable/disable 585 */ 586 int (*port_enable)(struct dsa_switch *ds, int port, 587 struct phy_device *phy); 588 void (*port_disable)(struct dsa_switch *ds, int port); 589 590 /* 591 * Port's MAC EEE settings 592 */ 593 int (*set_mac_eee)(struct dsa_switch *ds, int port, 594 struct ethtool_eee *e); 595 int (*get_mac_eee)(struct dsa_switch *ds, int port, 596 struct ethtool_eee *e); 597 598 /* EEPROM access */ 599 int (*get_eeprom_len)(struct dsa_switch *ds); 600 int (*get_eeprom)(struct dsa_switch *ds, 601 struct ethtool_eeprom *eeprom, u8 *data); 602 int (*set_eeprom)(struct dsa_switch *ds, 603 struct ethtool_eeprom *eeprom, u8 *data); 604 605 /* 606 * Register access. 607 */ 608 int (*get_regs_len)(struct dsa_switch *ds, int port); 609 void (*get_regs)(struct dsa_switch *ds, int port, 610 struct ethtool_regs *regs, void *p); 611 612 /* 613 * Upper device tracking. 614 */ 615 int (*port_prechangeupper)(struct dsa_switch *ds, int port, 616 struct netdev_notifier_changeupper_info *info); 617 618 /* 619 * Bridge integration 620 */ 621 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 622 int (*port_bridge_join)(struct dsa_switch *ds, int port, 623 struct net_device *bridge); 624 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 625 struct net_device *bridge); 626 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 627 u8 state); 628 void (*port_fast_age)(struct dsa_switch *ds, int port); 629 int (*port_egress_floods)(struct dsa_switch *ds, int port, 630 bool unicast, bool multicast); 631 632 /* 633 * VLAN support 634 */ 635 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 636 bool vlan_filtering); 637 int (*port_vlan_add)(struct dsa_switch *ds, int port, 638 const struct switchdev_obj_port_vlan *vlan); 639 int (*port_vlan_del)(struct dsa_switch *ds, int port, 640 const struct switchdev_obj_port_vlan *vlan); 641 /* 642 * Forwarding database 643 */ 644 int (*port_fdb_add)(struct dsa_switch *ds, int port, 645 const unsigned char *addr, u16 vid); 646 int (*port_fdb_del)(struct dsa_switch *ds, int port, 647 const unsigned char *addr, u16 vid); 648 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 649 dsa_fdb_dump_cb_t *cb, void *data); 650 651 /* 652 * Multicast database 653 */ 654 int (*port_mdb_add)(struct dsa_switch *ds, int port, 655 const struct switchdev_obj_port_mdb *mdb); 656 int (*port_mdb_del)(struct dsa_switch *ds, int port, 657 const struct switchdev_obj_port_mdb *mdb); 658 /* 659 * RXNFC 660 */ 661 int (*get_rxnfc)(struct dsa_switch *ds, int port, 662 struct ethtool_rxnfc *nfc, u32 *rule_locs); 663 int (*set_rxnfc)(struct dsa_switch *ds, int port, 664 struct ethtool_rxnfc *nfc); 665 666 /* 667 * TC integration 668 */ 669 int (*cls_flower_add)(struct dsa_switch *ds, int port, 670 struct flow_cls_offload *cls, bool ingress); 671 int (*cls_flower_del)(struct dsa_switch *ds, int port, 672 struct flow_cls_offload *cls, bool ingress); 673 int (*cls_flower_stats)(struct dsa_switch *ds, int port, 674 struct flow_cls_offload *cls, bool ingress); 675 int (*port_mirror_add)(struct dsa_switch *ds, int port, 676 struct dsa_mall_mirror_tc_entry *mirror, 677 bool ingress); 678 void (*port_mirror_del)(struct dsa_switch *ds, int port, 679 struct dsa_mall_mirror_tc_entry *mirror); 680 int (*port_policer_add)(struct dsa_switch *ds, int port, 681 struct dsa_mall_policer_tc_entry *policer); 682 void (*port_policer_del)(struct dsa_switch *ds, int port); 683 int (*port_setup_tc)(struct dsa_switch *ds, int port, 684 enum tc_setup_type type, void *type_data); 685 686 /* 687 * Cross-chip operations 688 */ 689 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index, 690 int sw_index, int port, 691 struct net_device *br); 692 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index, 693 int sw_index, int port, 694 struct net_device *br); 695 int (*crosschip_lag_change)(struct dsa_switch *ds, int sw_index, 696 int port); 697 int (*crosschip_lag_join)(struct dsa_switch *ds, int sw_index, 698 int port, struct net_device *lag, 699 struct netdev_lag_upper_info *info); 700 int (*crosschip_lag_leave)(struct dsa_switch *ds, int sw_index, 701 int port, struct net_device *lag); 702 703 /* 704 * PTP functionality 705 */ 706 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 707 struct ifreq *ifr); 708 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 709 struct ifreq *ifr); 710 bool (*port_txtstamp)(struct dsa_switch *ds, int port, 711 struct sk_buff *clone, unsigned int type); 712 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 713 struct sk_buff *skb, unsigned int type); 714 715 /* Devlink parameters, etc */ 716 int (*devlink_param_get)(struct dsa_switch *ds, u32 id, 717 struct devlink_param_gset_ctx *ctx); 718 int (*devlink_param_set)(struct dsa_switch *ds, u32 id, 719 struct devlink_param_gset_ctx *ctx); 720 int (*devlink_info_get)(struct dsa_switch *ds, 721 struct devlink_info_req *req, 722 struct netlink_ext_ack *extack); 723 int (*devlink_sb_pool_get)(struct dsa_switch *ds, 724 unsigned int sb_index, u16 pool_index, 725 struct devlink_sb_pool_info *pool_info); 726 int (*devlink_sb_pool_set)(struct dsa_switch *ds, unsigned int sb_index, 727 u16 pool_index, u32 size, 728 enum devlink_sb_threshold_type threshold_type, 729 struct netlink_ext_ack *extack); 730 int (*devlink_sb_port_pool_get)(struct dsa_switch *ds, int port, 731 unsigned int sb_index, u16 pool_index, 732 u32 *p_threshold); 733 int (*devlink_sb_port_pool_set)(struct dsa_switch *ds, int port, 734 unsigned int sb_index, u16 pool_index, 735 u32 threshold, 736 struct netlink_ext_ack *extack); 737 int (*devlink_sb_tc_pool_bind_get)(struct dsa_switch *ds, int port, 738 unsigned int sb_index, u16 tc_index, 739 enum devlink_sb_pool_type pool_type, 740 u16 *p_pool_index, u32 *p_threshold); 741 int (*devlink_sb_tc_pool_bind_set)(struct dsa_switch *ds, int port, 742 unsigned int sb_index, u16 tc_index, 743 enum devlink_sb_pool_type pool_type, 744 u16 pool_index, u32 threshold, 745 struct netlink_ext_ack *extack); 746 int (*devlink_sb_occ_snapshot)(struct dsa_switch *ds, 747 unsigned int sb_index); 748 int (*devlink_sb_occ_max_clear)(struct dsa_switch *ds, 749 unsigned int sb_index); 750 int (*devlink_sb_occ_port_pool_get)(struct dsa_switch *ds, int port, 751 unsigned int sb_index, u16 pool_index, 752 u32 *p_cur, u32 *p_max); 753 int (*devlink_sb_occ_tc_port_bind_get)(struct dsa_switch *ds, int port, 754 unsigned int sb_index, u16 tc_index, 755 enum devlink_sb_pool_type pool_type, 756 u32 *p_cur, u32 *p_max); 757 758 /* 759 * MTU change functionality. Switches can also adjust their MRU through 760 * this method. By MTU, one understands the SDU (L2 payload) length. 761 * If the switch needs to account for the DSA tag on the CPU port, this 762 * method needs to do so privately. 763 */ 764 int (*port_change_mtu)(struct dsa_switch *ds, int port, 765 int new_mtu); 766 int (*port_max_mtu)(struct dsa_switch *ds, int port); 767 768 /* 769 * LAG integration 770 */ 771 int (*port_lag_change)(struct dsa_switch *ds, int port); 772 int (*port_lag_join)(struct dsa_switch *ds, int port, 773 struct net_device *lag, 774 struct netdev_lag_upper_info *info); 775 int (*port_lag_leave)(struct dsa_switch *ds, int port, 776 struct net_device *lag); 777 778 /* 779 * HSR integration 780 */ 781 int (*port_hsr_join)(struct dsa_switch *ds, int port, 782 struct net_device *hsr); 783 int (*port_hsr_leave)(struct dsa_switch *ds, int port, 784 struct net_device *hsr); 785 }; 786 787 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \ 788 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \ 789 dsa_devlink_param_get, dsa_devlink_param_set, NULL) 790 791 int dsa_devlink_param_get(struct devlink *dl, u32 id, 792 struct devlink_param_gset_ctx *ctx); 793 int dsa_devlink_param_set(struct devlink *dl, u32 id, 794 struct devlink_param_gset_ctx *ctx); 795 int dsa_devlink_params_register(struct dsa_switch *ds, 796 const struct devlink_param *params, 797 size_t params_count); 798 void dsa_devlink_params_unregister(struct dsa_switch *ds, 799 const struct devlink_param *params, 800 size_t params_count); 801 int dsa_devlink_resource_register(struct dsa_switch *ds, 802 const char *resource_name, 803 u64 resource_size, 804 u64 resource_id, 805 u64 parent_resource_id, 806 const struct devlink_resource_size_params *size_params); 807 808 void dsa_devlink_resources_unregister(struct dsa_switch *ds); 809 810 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds, 811 u64 resource_id, 812 devlink_resource_occ_get_t *occ_get, 813 void *occ_get_priv); 814 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds, 815 u64 resource_id); 816 struct devlink_region * 817 dsa_devlink_region_create(struct dsa_switch *ds, 818 const struct devlink_region_ops *ops, 819 u32 region_max_snapshots, u64 region_size); 820 struct devlink_region * 821 dsa_devlink_port_region_create(struct dsa_switch *ds, 822 int port, 823 const struct devlink_port_region_ops *ops, 824 u32 region_max_snapshots, u64 region_size); 825 void dsa_devlink_region_destroy(struct devlink_region *region); 826 827 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev); 828 829 struct dsa_devlink_priv { 830 struct dsa_switch *ds; 831 }; 832 833 static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl) 834 { 835 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 836 837 return dl_priv->ds; 838 } 839 840 static inline 841 struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port) 842 { 843 struct devlink *dl = port->devlink; 844 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 845 846 return dl_priv->ds; 847 } 848 849 static inline int dsa_devlink_port_to_port(struct devlink_port *port) 850 { 851 return port->index; 852 } 853 854 struct dsa_switch_driver { 855 struct list_head list; 856 const struct dsa_switch_ops *ops; 857 }; 858 859 struct net_device *dsa_dev_to_net_device(struct device *dev); 860 861 /* Keep inline for faster access in hot path */ 862 static inline bool netdev_uses_dsa(const struct net_device *dev) 863 { 864 #if IS_ENABLED(CONFIG_NET_DSA) 865 return dev->dsa_ptr && dev->dsa_ptr->rcv; 866 #endif 867 return false; 868 } 869 870 static inline bool dsa_can_decode(const struct sk_buff *skb, 871 struct net_device *dev) 872 { 873 #if IS_ENABLED(CONFIG_NET_DSA) 874 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev); 875 #endif 876 return false; 877 } 878 879 /* All DSA tags that push the EtherType to the right (basically all except tail 880 * tags, which don't break dissection) can be treated the same from the 881 * perspective of the flow dissector. 882 * 883 * We need to return: 884 * - offset: the (B - A) difference between: 885 * A. the position of the real EtherType and 886 * B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes 887 * after the normal EtherType was supposed to be) 888 * The offset in bytes is exactly equal to the tagger overhead (and half of 889 * that, in __be16 shorts). 890 * 891 * - proto: the value of the real EtherType. 892 */ 893 static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb, 894 __be16 *proto, int *offset) 895 { 896 #if IS_ENABLED(CONFIG_NET_DSA) 897 const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops; 898 int tag_len = ops->overhead; 899 900 *offset = tag_len; 901 *proto = ((__be16 *)skb->data)[(tag_len / 2) - 1]; 902 #endif 903 } 904 905 #if IS_ENABLED(CONFIG_NET_DSA) 906 static inline int __dsa_netdevice_ops_check(struct net_device *dev) 907 { 908 int err = -EOPNOTSUPP; 909 910 if (!dev->dsa_ptr) 911 return err; 912 913 if (!dev->dsa_ptr->netdev_ops) 914 return err; 915 916 return 0; 917 } 918 919 static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr, 920 int cmd) 921 { 922 const struct dsa_netdevice_ops *ops; 923 int err; 924 925 err = __dsa_netdevice_ops_check(dev); 926 if (err) 927 return err; 928 929 ops = dev->dsa_ptr->netdev_ops; 930 931 return ops->ndo_do_ioctl(dev, ifr, cmd); 932 } 933 #else 934 static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr, 935 int cmd) 936 { 937 return -EOPNOTSUPP; 938 } 939 #endif 940 941 void dsa_unregister_switch(struct dsa_switch *ds); 942 int dsa_register_switch(struct dsa_switch *ds); 943 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index); 944 #ifdef CONFIG_PM_SLEEP 945 int dsa_switch_suspend(struct dsa_switch *ds); 946 int dsa_switch_resume(struct dsa_switch *ds); 947 #else 948 static inline int dsa_switch_suspend(struct dsa_switch *ds) 949 { 950 return 0; 951 } 952 static inline int dsa_switch_resume(struct dsa_switch *ds) 953 { 954 return 0; 955 } 956 #endif /* CONFIG_PM_SLEEP */ 957 958 #if IS_ENABLED(CONFIG_NET_DSA) 959 bool dsa_slave_dev_check(const struct net_device *dev); 960 #else 961 static inline bool dsa_slave_dev_check(const struct net_device *dev) 962 { 963 return false; 964 } 965 #endif 966 967 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 968 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data); 969 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data); 970 int dsa_port_get_phy_sset_count(struct dsa_port *dp); 971 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 972 973 struct dsa_tag_driver { 974 const struct dsa_device_ops *ops; 975 struct list_head list; 976 struct module *owner; 977 }; 978 979 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 980 unsigned int count, 981 struct module *owner); 982 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 983 unsigned int count); 984 985 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 986 static int __init dsa_tag_driver_module_init(void) \ 987 { \ 988 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 989 THIS_MODULE); \ 990 return 0; \ 991 } \ 992 module_init(dsa_tag_driver_module_init); \ 993 \ 994 static void __exit dsa_tag_driver_module_exit(void) \ 995 { \ 996 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 997 } \ 998 module_exit(dsa_tag_driver_module_exit) 999 1000 /** 1001 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 1002 * drivers 1003 * @__ops_array: Array of tag driver strucutres 1004 * 1005 * Helper macro for DSA tag drivers which do not do anything special 1006 * in module init/exit. Each module may only use this macro once, and 1007 * calling it replaces module_init() and module_exit(). 1008 */ 1009 #define module_dsa_tag_drivers(__ops_array) \ 1010 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 1011 1012 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 1013 1014 /* Create a static structure we can build a linked list of dsa_tag 1015 * drivers 1016 */ 1017 #define DSA_TAG_DRIVER(__ops) \ 1018 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 1019 .ops = &__ops, \ 1020 } 1021 1022 /** 1023 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 1024 * driver 1025 * @__ops: Single tag driver structures 1026 * 1027 * Helper macro for DSA tag drivers which do not do anything special 1028 * in module init/exit. Each module may only use this macro once, and 1029 * calling it replaces module_init() and module_exit(). 1030 */ 1031 #define module_dsa_tag_driver(__ops) \ 1032 DSA_TAG_DRIVER(__ops); \ 1033 \ 1034 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 1035 &DSA_TAG_DRIVER_NAME(__ops) \ 1036 }; \ 1037 module_dsa_tag_drivers(dsa_tag_driver_array) 1038 #endif 1039 1040