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