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 static inline struct net_device *dsa_lag_dev(struct dsa_switch_tree *dst, 176 unsigned int id) 177 { 178 return dst->lags[id]; 179 } 180 181 static inline int dsa_lag_id(struct dsa_switch_tree *dst, 182 struct net_device *lag) 183 { 184 unsigned int id; 185 186 dsa_lags_foreach_id(id, dst) { 187 if (dsa_lag_dev(dst, id) == lag) 188 return id; 189 } 190 191 return -ENODEV; 192 } 193 194 /* TC matchall action types */ 195 enum dsa_port_mall_action_type { 196 DSA_PORT_MALL_MIRROR, 197 DSA_PORT_MALL_POLICER, 198 }; 199 200 /* TC mirroring entry */ 201 struct dsa_mall_mirror_tc_entry { 202 u8 to_local_port; 203 bool ingress; 204 }; 205 206 /* TC port policer entry */ 207 struct dsa_mall_policer_tc_entry { 208 u32 burst; 209 u64 rate_bytes_per_sec; 210 }; 211 212 /* TC matchall entry */ 213 struct dsa_mall_tc_entry { 214 struct list_head list; 215 unsigned long cookie; 216 enum dsa_port_mall_action_type type; 217 union { 218 struct dsa_mall_mirror_tc_entry mirror; 219 struct dsa_mall_policer_tc_entry policer; 220 }; 221 }; 222 223 224 struct dsa_port { 225 /* A CPU port is physically connected to a master device. 226 * A user port exposed to userspace has a slave device. 227 */ 228 union { 229 struct net_device *master; 230 struct net_device *slave; 231 }; 232 233 /* Copy of the tagging protocol operations, for quicker access 234 * in the data path. Valid only for the CPU ports. 235 */ 236 const struct dsa_device_ops *tag_ops; 237 238 /* Copies for faster access in master receive hot path */ 239 struct dsa_switch_tree *dst; 240 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 241 struct packet_type *pt); 242 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 243 244 enum { 245 DSA_PORT_TYPE_UNUSED = 0, 246 DSA_PORT_TYPE_CPU, 247 DSA_PORT_TYPE_DSA, 248 DSA_PORT_TYPE_USER, 249 } type; 250 251 struct dsa_switch *ds; 252 unsigned int index; 253 const char *name; 254 struct dsa_port *cpu_dp; 255 const char *mac; 256 struct device_node *dn; 257 unsigned int ageing_time; 258 bool vlan_filtering; 259 u8 stp_state; 260 struct net_device *bridge_dev; 261 struct devlink_port devlink_port; 262 bool devlink_port_setup; 263 struct phylink *pl; 264 struct phylink_config pl_config; 265 struct net_device *lag_dev; 266 bool lag_tx_enabled; 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 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 488 bool is_static, void *data); 489 struct dsa_switch_ops { 490 /* 491 * Tagging protocol helpers called for the CPU ports and DSA links. 492 * @get_tag_protocol retrieves the initial tagging protocol and is 493 * mandatory. Switches which can operate using multiple tagging 494 * protocols should implement @change_tag_protocol and report in 495 * @get_tag_protocol the tagger in current use. 496 */ 497 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 498 int port, 499 enum dsa_tag_protocol mprot); 500 int (*change_tag_protocol)(struct dsa_switch *ds, int port, 501 enum dsa_tag_protocol proto); 502 503 int (*setup)(struct dsa_switch *ds); 504 void (*teardown)(struct dsa_switch *ds); 505 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 506 507 /* 508 * Access to the switch's PHY registers. 509 */ 510 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 511 int (*phy_write)(struct dsa_switch *ds, int port, 512 int regnum, u16 val); 513 514 /* 515 * Link state adjustment (called from libphy) 516 */ 517 void (*adjust_link)(struct dsa_switch *ds, int port, 518 struct phy_device *phydev); 519 void (*fixed_link_update)(struct dsa_switch *ds, int port, 520 struct fixed_phy_status *st); 521 522 /* 523 * PHYLINK integration 524 */ 525 void (*phylink_validate)(struct dsa_switch *ds, int port, 526 unsigned long *supported, 527 struct phylink_link_state *state); 528 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 529 struct phylink_link_state *state); 530 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 531 unsigned int mode, 532 const struct phylink_link_state *state); 533 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 534 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 535 unsigned int mode, 536 phy_interface_t interface); 537 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 538 unsigned int mode, 539 phy_interface_t interface, 540 struct phy_device *phydev, 541 int speed, int duplex, 542 bool tx_pause, bool rx_pause); 543 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 544 struct phylink_link_state *state); 545 /* 546 * Port statistics counters. 547 */ 548 void (*get_strings)(struct dsa_switch *ds, int port, 549 u32 stringset, uint8_t *data); 550 void (*get_ethtool_stats)(struct dsa_switch *ds, 551 int port, uint64_t *data); 552 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 553 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 554 int port, uint64_t *data); 555 void (*get_stats64)(struct dsa_switch *ds, int port, 556 struct rtnl_link_stats64 *s); 557 558 /* 559 * ethtool Wake-on-LAN 560 */ 561 void (*get_wol)(struct dsa_switch *ds, int port, 562 struct ethtool_wolinfo *w); 563 int (*set_wol)(struct dsa_switch *ds, int port, 564 struct ethtool_wolinfo *w); 565 566 /* 567 * ethtool timestamp info 568 */ 569 int (*get_ts_info)(struct dsa_switch *ds, int port, 570 struct ethtool_ts_info *ts); 571 572 /* 573 * Suspend and resume 574 */ 575 int (*suspend)(struct dsa_switch *ds); 576 int (*resume)(struct dsa_switch *ds); 577 578 /* 579 * Port enable/disable 580 */ 581 int (*port_enable)(struct dsa_switch *ds, int port, 582 struct phy_device *phy); 583 void (*port_disable)(struct dsa_switch *ds, int port); 584 585 /* 586 * Port's MAC EEE settings 587 */ 588 int (*set_mac_eee)(struct dsa_switch *ds, int port, 589 struct ethtool_eee *e); 590 int (*get_mac_eee)(struct dsa_switch *ds, int port, 591 struct ethtool_eee *e); 592 593 /* EEPROM access */ 594 int (*get_eeprom_len)(struct dsa_switch *ds); 595 int (*get_eeprom)(struct dsa_switch *ds, 596 struct ethtool_eeprom *eeprom, u8 *data); 597 int (*set_eeprom)(struct dsa_switch *ds, 598 struct ethtool_eeprom *eeprom, u8 *data); 599 600 /* 601 * Register access. 602 */ 603 int (*get_regs_len)(struct dsa_switch *ds, int port); 604 void (*get_regs)(struct dsa_switch *ds, int port, 605 struct ethtool_regs *regs, void *p); 606 607 /* 608 * Upper device tracking. 609 */ 610 int (*port_prechangeupper)(struct dsa_switch *ds, int port, 611 struct netdev_notifier_changeupper_info *info); 612 613 /* 614 * Bridge integration 615 */ 616 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 617 int (*port_bridge_join)(struct dsa_switch *ds, int port, 618 struct net_device *bridge); 619 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 620 struct net_device *bridge); 621 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 622 u8 state); 623 void (*port_fast_age)(struct dsa_switch *ds, int port); 624 int (*port_egress_floods)(struct dsa_switch *ds, int port, 625 bool unicast, bool multicast); 626 627 /* 628 * VLAN support 629 */ 630 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 631 bool vlan_filtering); 632 int (*port_vlan_add)(struct dsa_switch *ds, int port, 633 const struct switchdev_obj_port_vlan *vlan); 634 int (*port_vlan_del)(struct dsa_switch *ds, int port, 635 const struct switchdev_obj_port_vlan *vlan); 636 /* 637 * Forwarding database 638 */ 639 int (*port_fdb_add)(struct dsa_switch *ds, int port, 640 const unsigned char *addr, u16 vid); 641 int (*port_fdb_del)(struct dsa_switch *ds, int port, 642 const unsigned char *addr, u16 vid); 643 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 644 dsa_fdb_dump_cb_t *cb, void *data); 645 646 /* 647 * Multicast database 648 */ 649 int (*port_mdb_add)(struct dsa_switch *ds, int port, 650 const struct switchdev_obj_port_mdb *mdb); 651 int (*port_mdb_del)(struct dsa_switch *ds, int port, 652 const struct switchdev_obj_port_mdb *mdb); 653 /* 654 * RXNFC 655 */ 656 int (*get_rxnfc)(struct dsa_switch *ds, int port, 657 struct ethtool_rxnfc *nfc, u32 *rule_locs); 658 int (*set_rxnfc)(struct dsa_switch *ds, int port, 659 struct ethtool_rxnfc *nfc); 660 661 /* 662 * TC integration 663 */ 664 int (*cls_flower_add)(struct dsa_switch *ds, int port, 665 struct flow_cls_offload *cls, bool ingress); 666 int (*cls_flower_del)(struct dsa_switch *ds, int port, 667 struct flow_cls_offload *cls, bool ingress); 668 int (*cls_flower_stats)(struct dsa_switch *ds, int port, 669 struct flow_cls_offload *cls, bool ingress); 670 int (*port_mirror_add)(struct dsa_switch *ds, int port, 671 struct dsa_mall_mirror_tc_entry *mirror, 672 bool ingress); 673 void (*port_mirror_del)(struct dsa_switch *ds, int port, 674 struct dsa_mall_mirror_tc_entry *mirror); 675 int (*port_policer_add)(struct dsa_switch *ds, int port, 676 struct dsa_mall_policer_tc_entry *policer); 677 void (*port_policer_del)(struct dsa_switch *ds, int port); 678 int (*port_setup_tc)(struct dsa_switch *ds, int port, 679 enum tc_setup_type type, void *type_data); 680 681 /* 682 * Cross-chip operations 683 */ 684 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index, 685 int sw_index, int port, 686 struct net_device *br); 687 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index, 688 int sw_index, int port, 689 struct net_device *br); 690 int (*crosschip_lag_change)(struct dsa_switch *ds, int sw_index, 691 int port); 692 int (*crosschip_lag_join)(struct dsa_switch *ds, int sw_index, 693 int port, struct net_device *lag, 694 struct netdev_lag_upper_info *info); 695 int (*crosschip_lag_leave)(struct dsa_switch *ds, int sw_index, 696 int port, struct net_device *lag); 697 698 /* 699 * PTP functionality 700 */ 701 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 702 struct ifreq *ifr); 703 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 704 struct ifreq *ifr); 705 bool (*port_txtstamp)(struct dsa_switch *ds, int port, 706 struct sk_buff *clone, unsigned int type); 707 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 708 struct sk_buff *skb, unsigned int type); 709 710 /* Devlink parameters, etc */ 711 int (*devlink_param_get)(struct dsa_switch *ds, u32 id, 712 struct devlink_param_gset_ctx *ctx); 713 int (*devlink_param_set)(struct dsa_switch *ds, u32 id, 714 struct devlink_param_gset_ctx *ctx); 715 int (*devlink_info_get)(struct dsa_switch *ds, 716 struct devlink_info_req *req, 717 struct netlink_ext_ack *extack); 718 int (*devlink_sb_pool_get)(struct dsa_switch *ds, 719 unsigned int sb_index, u16 pool_index, 720 struct devlink_sb_pool_info *pool_info); 721 int (*devlink_sb_pool_set)(struct dsa_switch *ds, unsigned int sb_index, 722 u16 pool_index, u32 size, 723 enum devlink_sb_threshold_type threshold_type, 724 struct netlink_ext_ack *extack); 725 int (*devlink_sb_port_pool_get)(struct dsa_switch *ds, int port, 726 unsigned int sb_index, u16 pool_index, 727 u32 *p_threshold); 728 int (*devlink_sb_port_pool_set)(struct dsa_switch *ds, int port, 729 unsigned int sb_index, u16 pool_index, 730 u32 threshold, 731 struct netlink_ext_ack *extack); 732 int (*devlink_sb_tc_pool_bind_get)(struct dsa_switch *ds, int port, 733 unsigned int sb_index, u16 tc_index, 734 enum devlink_sb_pool_type pool_type, 735 u16 *p_pool_index, u32 *p_threshold); 736 int (*devlink_sb_tc_pool_bind_set)(struct dsa_switch *ds, int port, 737 unsigned int sb_index, u16 tc_index, 738 enum devlink_sb_pool_type pool_type, 739 u16 pool_index, u32 threshold, 740 struct netlink_ext_ack *extack); 741 int (*devlink_sb_occ_snapshot)(struct dsa_switch *ds, 742 unsigned int sb_index); 743 int (*devlink_sb_occ_max_clear)(struct dsa_switch *ds, 744 unsigned int sb_index); 745 int (*devlink_sb_occ_port_pool_get)(struct dsa_switch *ds, int port, 746 unsigned int sb_index, u16 pool_index, 747 u32 *p_cur, u32 *p_max); 748 int (*devlink_sb_occ_tc_port_bind_get)(struct dsa_switch *ds, int port, 749 unsigned int sb_index, u16 tc_index, 750 enum devlink_sb_pool_type pool_type, 751 u32 *p_cur, u32 *p_max); 752 753 /* 754 * MTU change functionality. Switches can also adjust their MRU through 755 * this method. By MTU, one understands the SDU (L2 payload) length. 756 * If the switch needs to account for the DSA tag on the CPU port, this 757 * method needs to do so privately. 758 */ 759 int (*port_change_mtu)(struct dsa_switch *ds, int port, 760 int new_mtu); 761 int (*port_max_mtu)(struct dsa_switch *ds, int port); 762 763 /* 764 * LAG integration 765 */ 766 int (*port_lag_change)(struct dsa_switch *ds, int port); 767 int (*port_lag_join)(struct dsa_switch *ds, int port, 768 struct net_device *lag, 769 struct netdev_lag_upper_info *info); 770 int (*port_lag_leave)(struct dsa_switch *ds, int port, 771 struct net_device *lag); 772 }; 773 774 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \ 775 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \ 776 dsa_devlink_param_get, dsa_devlink_param_set, NULL) 777 778 int dsa_devlink_param_get(struct devlink *dl, u32 id, 779 struct devlink_param_gset_ctx *ctx); 780 int dsa_devlink_param_set(struct devlink *dl, u32 id, 781 struct devlink_param_gset_ctx *ctx); 782 int dsa_devlink_params_register(struct dsa_switch *ds, 783 const struct devlink_param *params, 784 size_t params_count); 785 void dsa_devlink_params_unregister(struct dsa_switch *ds, 786 const struct devlink_param *params, 787 size_t params_count); 788 int dsa_devlink_resource_register(struct dsa_switch *ds, 789 const char *resource_name, 790 u64 resource_size, 791 u64 resource_id, 792 u64 parent_resource_id, 793 const struct devlink_resource_size_params *size_params); 794 795 void dsa_devlink_resources_unregister(struct dsa_switch *ds); 796 797 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds, 798 u64 resource_id, 799 devlink_resource_occ_get_t *occ_get, 800 void *occ_get_priv); 801 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds, 802 u64 resource_id); 803 struct devlink_region * 804 dsa_devlink_region_create(struct dsa_switch *ds, 805 const struct devlink_region_ops *ops, 806 u32 region_max_snapshots, u64 region_size); 807 struct devlink_region * 808 dsa_devlink_port_region_create(struct dsa_switch *ds, 809 int port, 810 const struct devlink_port_region_ops *ops, 811 u32 region_max_snapshots, u64 region_size); 812 void dsa_devlink_region_destroy(struct devlink_region *region); 813 814 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev); 815 816 struct dsa_devlink_priv { 817 struct dsa_switch *ds; 818 }; 819 820 static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl) 821 { 822 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 823 824 return dl_priv->ds; 825 } 826 827 static inline 828 struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port) 829 { 830 struct devlink *dl = port->devlink; 831 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 832 833 return dl_priv->ds; 834 } 835 836 static inline int dsa_devlink_port_to_port(struct devlink_port *port) 837 { 838 return port->index; 839 } 840 841 struct dsa_switch_driver { 842 struct list_head list; 843 const struct dsa_switch_ops *ops; 844 }; 845 846 struct net_device *dsa_dev_to_net_device(struct device *dev); 847 848 /* Keep inline for faster access in hot path */ 849 static inline bool netdev_uses_dsa(const struct net_device *dev) 850 { 851 #if IS_ENABLED(CONFIG_NET_DSA) 852 return dev->dsa_ptr && dev->dsa_ptr->rcv; 853 #endif 854 return false; 855 } 856 857 static inline bool dsa_can_decode(const struct sk_buff *skb, 858 struct net_device *dev) 859 { 860 #if IS_ENABLED(CONFIG_NET_DSA) 861 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev); 862 #endif 863 return false; 864 } 865 866 /* All DSA tags that push the EtherType to the right (basically all except tail 867 * tags, which don't break dissection) can be treated the same from the 868 * perspective of the flow dissector. 869 * 870 * We need to return: 871 * - offset: the (B - A) difference between: 872 * A. the position of the real EtherType and 873 * B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes 874 * after the normal EtherType was supposed to be) 875 * The offset in bytes is exactly equal to the tagger overhead (and half of 876 * that, in __be16 shorts). 877 * 878 * - proto: the value of the real EtherType. 879 */ 880 static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb, 881 __be16 *proto, int *offset) 882 { 883 #if IS_ENABLED(CONFIG_NET_DSA) 884 const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops; 885 int tag_len = ops->overhead; 886 887 *offset = tag_len; 888 *proto = ((__be16 *)skb->data)[(tag_len / 2) - 1]; 889 #endif 890 } 891 892 #if IS_ENABLED(CONFIG_NET_DSA) 893 static inline int __dsa_netdevice_ops_check(struct net_device *dev) 894 { 895 int err = -EOPNOTSUPP; 896 897 if (!dev->dsa_ptr) 898 return err; 899 900 if (!dev->dsa_ptr->netdev_ops) 901 return err; 902 903 return 0; 904 } 905 906 static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr, 907 int cmd) 908 { 909 const struct dsa_netdevice_ops *ops; 910 int err; 911 912 err = __dsa_netdevice_ops_check(dev); 913 if (err) 914 return err; 915 916 ops = dev->dsa_ptr->netdev_ops; 917 918 return ops->ndo_do_ioctl(dev, ifr, cmd); 919 } 920 #else 921 static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr, 922 int cmd) 923 { 924 return -EOPNOTSUPP; 925 } 926 #endif 927 928 void dsa_unregister_switch(struct dsa_switch *ds); 929 int dsa_register_switch(struct dsa_switch *ds); 930 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index); 931 #ifdef CONFIG_PM_SLEEP 932 int dsa_switch_suspend(struct dsa_switch *ds); 933 int dsa_switch_resume(struct dsa_switch *ds); 934 #else 935 static inline int dsa_switch_suspend(struct dsa_switch *ds) 936 { 937 return 0; 938 } 939 static inline int dsa_switch_resume(struct dsa_switch *ds) 940 { 941 return 0; 942 } 943 #endif /* CONFIG_PM_SLEEP */ 944 945 #if IS_ENABLED(CONFIG_NET_DSA) 946 bool dsa_slave_dev_check(const struct net_device *dev); 947 #else 948 static inline bool dsa_slave_dev_check(const struct net_device *dev) 949 { 950 return false; 951 } 952 #endif 953 954 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 955 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data); 956 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data); 957 int dsa_port_get_phy_sset_count(struct dsa_port *dp); 958 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 959 960 struct dsa_tag_driver { 961 const struct dsa_device_ops *ops; 962 struct list_head list; 963 struct module *owner; 964 }; 965 966 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 967 unsigned int count, 968 struct module *owner); 969 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 970 unsigned int count); 971 972 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 973 static int __init dsa_tag_driver_module_init(void) \ 974 { \ 975 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 976 THIS_MODULE); \ 977 return 0; \ 978 } \ 979 module_init(dsa_tag_driver_module_init); \ 980 \ 981 static void __exit dsa_tag_driver_module_exit(void) \ 982 { \ 983 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 984 } \ 985 module_exit(dsa_tag_driver_module_exit) 986 987 /** 988 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 989 * drivers 990 * @__ops_array: Array of tag driver strucutres 991 * 992 * Helper macro for DSA tag drivers which do not do anything special 993 * in module init/exit. Each module may only use this macro once, and 994 * calling it replaces module_init() and module_exit(). 995 */ 996 #define module_dsa_tag_drivers(__ops_array) \ 997 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 998 999 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 1000 1001 /* Create a static structure we can build a linked list of dsa_tag 1002 * drivers 1003 */ 1004 #define DSA_TAG_DRIVER(__ops) \ 1005 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 1006 .ops = &__ops, \ 1007 } 1008 1009 /** 1010 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 1011 * driver 1012 * @__ops: Single tag driver structures 1013 * 1014 * Helper macro for DSA tag drivers which do not do anything special 1015 * in module init/exit. Each module may only use this macro once, and 1016 * calling it replaces module_init() and module_exit(). 1017 */ 1018 #define module_dsa_tag_driver(__ops) \ 1019 DSA_TAG_DRIVER(__ops); \ 1020 \ 1021 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 1022 &DSA_TAG_DRIVER_NAME(__ops) \ 1023 }; \ 1024 module_dsa_tag_drivers(dsa_tag_driver_array) 1025 #endif 1026 1027