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 50 enum dsa_tag_protocol { 51 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, 52 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, 53 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, 54 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, 55 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, 56 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE, 57 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE, 58 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, 59 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, 60 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, 61 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, 62 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, 63 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, 64 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE, 65 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE, 66 DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE, 67 DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_VALUE, 68 DSA_TAG_PROTO_RTL4_A = DSA_TAG_PROTO_RTL4_A_VALUE, 69 DSA_TAG_PROTO_HELLCREEK = DSA_TAG_PROTO_HELLCREEK_VALUE, 70 }; 71 72 struct packet_type; 73 struct dsa_switch; 74 75 struct dsa_device_ops { 76 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev); 77 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 78 struct packet_type *pt); 79 void (*flow_dissect)(const struct sk_buff *skb, __be16 *proto, 80 int *offset); 81 /* Used to determine which traffic should match the DSA filter in 82 * eth_type_trans, and which, if any, should bypass it and be processed 83 * as regular on the master net device. 84 */ 85 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 86 unsigned int overhead; 87 const char *name; 88 enum dsa_tag_protocol proto; 89 /* Some tagging protocols either mangle or shift the destination MAC 90 * address, in which case the DSA master would drop packets on ingress 91 * if what it understands out of the destination MAC address is not in 92 * its RX filter. 93 */ 94 bool promisc_on_master; 95 bool tail_tag; 96 }; 97 98 /* This structure defines the control interfaces that are overlayed by the 99 * DSA layer on top of the DSA CPU/management net_device instance. This is 100 * used by the core net_device layer while calling various net_device_ops 101 * function pointers. 102 */ 103 struct dsa_netdevice_ops { 104 int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, 105 int cmd); 106 }; 107 108 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-" 109 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \ 110 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE)) 111 112 struct dsa_skb_cb { 113 struct sk_buff *clone; 114 }; 115 116 struct __dsa_skb_cb { 117 struct dsa_skb_cb cb; 118 u8 priv[48 - sizeof(struct dsa_skb_cb)]; 119 }; 120 121 #define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb)) 122 123 #define DSA_SKB_CB_PRIV(skb) \ 124 ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv)) 125 126 struct dsa_switch_tree { 127 struct list_head list; 128 129 /* Notifier chain for switch-wide events */ 130 struct raw_notifier_head nh; 131 132 /* Tree identifier */ 133 unsigned int index; 134 135 /* Number of switches attached to this tree */ 136 struct kref refcount; 137 138 /* Has this tree been applied to the hardware? */ 139 bool setup; 140 141 /* 142 * Configuration data for the platform device that owns 143 * this dsa switch tree instance. 144 */ 145 struct dsa_platform_data *pd; 146 147 /* List of switch ports */ 148 struct list_head ports; 149 150 /* List of DSA links composing the routing table */ 151 struct list_head rtable; 152 }; 153 154 /* TC matchall action types */ 155 enum dsa_port_mall_action_type { 156 DSA_PORT_MALL_MIRROR, 157 DSA_PORT_MALL_POLICER, 158 }; 159 160 /* TC mirroring entry */ 161 struct dsa_mall_mirror_tc_entry { 162 u8 to_local_port; 163 bool ingress; 164 }; 165 166 /* TC port policer entry */ 167 struct dsa_mall_policer_tc_entry { 168 u32 burst; 169 u64 rate_bytes_per_sec; 170 }; 171 172 /* TC matchall entry */ 173 struct dsa_mall_tc_entry { 174 struct list_head list; 175 unsigned long cookie; 176 enum dsa_port_mall_action_type type; 177 union { 178 struct dsa_mall_mirror_tc_entry mirror; 179 struct dsa_mall_policer_tc_entry policer; 180 }; 181 }; 182 183 184 struct dsa_port { 185 /* A CPU port is physically connected to a master device. 186 * A user port exposed to userspace has a slave device. 187 */ 188 union { 189 struct net_device *master; 190 struct net_device *slave; 191 }; 192 193 /* CPU port tagging operations used by master or slave devices */ 194 const struct dsa_device_ops *tag_ops; 195 196 /* Copies for faster access in master receive hot path */ 197 struct dsa_switch_tree *dst; 198 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 199 struct packet_type *pt); 200 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 201 202 enum { 203 DSA_PORT_TYPE_UNUSED = 0, 204 DSA_PORT_TYPE_CPU, 205 DSA_PORT_TYPE_DSA, 206 DSA_PORT_TYPE_USER, 207 } type; 208 209 struct dsa_switch *ds; 210 unsigned int index; 211 const char *name; 212 struct dsa_port *cpu_dp; 213 const char *mac; 214 struct device_node *dn; 215 unsigned int ageing_time; 216 bool vlan_filtering; 217 u8 stp_state; 218 struct net_device *bridge_dev; 219 struct devlink_port devlink_port; 220 bool devlink_port_setup; 221 struct phylink *pl; 222 struct phylink_config pl_config; 223 224 struct list_head list; 225 226 /* 227 * Give the switch driver somewhere to hang its per-port private data 228 * structures (accessible from the tagger). 229 */ 230 void *priv; 231 232 /* 233 * Original copy of the master netdev ethtool_ops 234 */ 235 const struct ethtool_ops *orig_ethtool_ops; 236 237 /* 238 * Original copy of the master netdev net_device_ops 239 */ 240 const struct dsa_netdevice_ops *netdev_ops; 241 242 bool setup; 243 }; 244 245 /* TODO: ideally DSA ports would have a single dp->link_dp member, 246 * and no dst->rtable nor this struct dsa_link would be needed, 247 * but this would require some more complex tree walking, 248 * so keep it stupid at the moment and list them all. 249 */ 250 struct dsa_link { 251 struct dsa_port *dp; 252 struct dsa_port *link_dp; 253 struct list_head list; 254 }; 255 256 struct dsa_switch { 257 bool setup; 258 259 struct device *dev; 260 261 /* 262 * Parent switch tree, and switch index. 263 */ 264 struct dsa_switch_tree *dst; 265 unsigned int index; 266 267 /* Listener for switch fabric events */ 268 struct notifier_block nb; 269 270 /* 271 * Give the switch driver somewhere to hang its private data 272 * structure. 273 */ 274 void *priv; 275 276 /* 277 * Configuration data for this switch. 278 */ 279 struct dsa_chip_data *cd; 280 281 /* 282 * The switch operations. 283 */ 284 const struct dsa_switch_ops *ops; 285 286 /* 287 * Slave mii_bus and devices for the individual ports. 288 */ 289 u32 phys_mii_mask; 290 struct mii_bus *slave_mii_bus; 291 292 /* Ageing Time limits in msecs */ 293 unsigned int ageing_time_min; 294 unsigned int ageing_time_max; 295 296 /* devlink used to represent this switch device */ 297 struct devlink *devlink; 298 299 /* Number of switch port queues */ 300 unsigned int num_tx_queues; 301 302 /* Disallow bridge core from requesting different VLAN awareness 303 * settings on ports if not hardware-supported 304 */ 305 bool vlan_filtering_is_global; 306 307 /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges 308 * that have vlan_filtering=0. All drivers should ideally set this (and 309 * then the option would get removed), but it is unknown whether this 310 * would break things or not. 311 */ 312 bool configure_vlan_while_not_filtering; 313 314 /* If the switch driver always programs the CPU port as egress tagged 315 * despite the VLAN configuration indicating otherwise, then setting 316 * @untag_bridge_pvid will force the DSA receive path to pop the bridge's 317 * default_pvid VLAN tagged frames to offer a consistent behavior 318 * between a vlan_filtering=0 and vlan_filtering=1 bridge device. 319 */ 320 bool untag_bridge_pvid; 321 322 /* In case vlan_filtering_is_global is set, the VLAN awareness state 323 * should be retrieved from here and not from the per-port settings. 324 */ 325 bool vlan_filtering; 326 327 /* MAC PCS does not provide link state change interrupt, and requires 328 * polling. Flag passed on to PHYLINK. 329 */ 330 bool pcs_poll; 331 332 /* For switches that only have the MRU configurable. To ensure the 333 * configured MTU is not exceeded, normalization of MRU on all bridged 334 * interfaces is needed. 335 */ 336 bool mtu_enforcement_ingress; 337 338 size_t num_ports; 339 }; 340 341 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 342 { 343 struct dsa_switch_tree *dst = ds->dst; 344 struct dsa_port *dp; 345 346 list_for_each_entry(dp, &dst->ports, list) 347 if (dp->ds == ds && dp->index == p) 348 return dp; 349 350 return NULL; 351 } 352 353 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 354 { 355 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 356 } 357 358 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 359 { 360 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 361 } 362 363 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 364 { 365 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 366 } 367 368 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 369 { 370 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 371 } 372 373 static inline u32 dsa_user_ports(struct dsa_switch *ds) 374 { 375 u32 mask = 0; 376 int p; 377 378 for (p = 0; p < ds->num_ports; p++) 379 if (dsa_is_user_port(ds, p)) 380 mask |= BIT(p); 381 382 return mask; 383 } 384 385 /* Return the local port used to reach an arbitrary switch device */ 386 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device) 387 { 388 struct dsa_switch_tree *dst = ds->dst; 389 struct dsa_link *dl; 390 391 list_for_each_entry(dl, &dst->rtable, list) 392 if (dl->dp->ds == ds && dl->link_dp->ds->index == device) 393 return dl->dp->index; 394 395 return ds->num_ports; 396 } 397 398 /* Return the local port used to reach an arbitrary switch port */ 399 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 400 int port) 401 { 402 if (device == ds->index) 403 return port; 404 else 405 return dsa_routing_port(ds, device); 406 } 407 408 /* Return the local port used to reach the dedicated CPU port */ 409 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 410 { 411 const struct dsa_port *dp = dsa_to_port(ds, port); 412 const struct dsa_port *cpu_dp = dp->cpu_dp; 413 414 if (!cpu_dp) 415 return port; 416 417 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 418 } 419 420 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 421 { 422 const struct dsa_switch *ds = dp->ds; 423 424 if (ds->vlan_filtering_is_global) 425 return ds->vlan_filtering; 426 else 427 return dp->vlan_filtering; 428 } 429 430 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 431 bool is_static, void *data); 432 struct dsa_switch_ops { 433 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 434 int port, 435 enum dsa_tag_protocol mprot); 436 437 int (*setup)(struct dsa_switch *ds); 438 void (*teardown)(struct dsa_switch *ds); 439 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 440 441 /* 442 * Access to the switch's PHY registers. 443 */ 444 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 445 int (*phy_write)(struct dsa_switch *ds, int port, 446 int regnum, u16 val); 447 448 /* 449 * Link state adjustment (called from libphy) 450 */ 451 void (*adjust_link)(struct dsa_switch *ds, int port, 452 struct phy_device *phydev); 453 void (*fixed_link_update)(struct dsa_switch *ds, int port, 454 struct fixed_phy_status *st); 455 456 /* 457 * PHYLINK integration 458 */ 459 void (*phylink_validate)(struct dsa_switch *ds, int port, 460 unsigned long *supported, 461 struct phylink_link_state *state); 462 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 463 struct phylink_link_state *state); 464 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 465 unsigned int mode, 466 const struct phylink_link_state *state); 467 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 468 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 469 unsigned int mode, 470 phy_interface_t interface); 471 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 472 unsigned int mode, 473 phy_interface_t interface, 474 struct phy_device *phydev, 475 int speed, int duplex, 476 bool tx_pause, bool rx_pause); 477 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 478 struct phylink_link_state *state); 479 /* 480 * ethtool hardware statistics. 481 */ 482 void (*get_strings)(struct dsa_switch *ds, int port, 483 u32 stringset, uint8_t *data); 484 void (*get_ethtool_stats)(struct dsa_switch *ds, 485 int port, uint64_t *data); 486 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 487 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 488 int port, uint64_t *data); 489 490 /* 491 * ethtool Wake-on-LAN 492 */ 493 void (*get_wol)(struct dsa_switch *ds, int port, 494 struct ethtool_wolinfo *w); 495 int (*set_wol)(struct dsa_switch *ds, int port, 496 struct ethtool_wolinfo *w); 497 498 /* 499 * ethtool timestamp info 500 */ 501 int (*get_ts_info)(struct dsa_switch *ds, int port, 502 struct ethtool_ts_info *ts); 503 504 /* 505 * Suspend and resume 506 */ 507 int (*suspend)(struct dsa_switch *ds); 508 int (*resume)(struct dsa_switch *ds); 509 510 /* 511 * Port enable/disable 512 */ 513 int (*port_enable)(struct dsa_switch *ds, int port, 514 struct phy_device *phy); 515 void (*port_disable)(struct dsa_switch *ds, int port); 516 517 /* 518 * Port's MAC EEE settings 519 */ 520 int (*set_mac_eee)(struct dsa_switch *ds, int port, 521 struct ethtool_eee *e); 522 int (*get_mac_eee)(struct dsa_switch *ds, int port, 523 struct ethtool_eee *e); 524 525 /* EEPROM access */ 526 int (*get_eeprom_len)(struct dsa_switch *ds); 527 int (*get_eeprom)(struct dsa_switch *ds, 528 struct ethtool_eeprom *eeprom, u8 *data); 529 int (*set_eeprom)(struct dsa_switch *ds, 530 struct ethtool_eeprom *eeprom, u8 *data); 531 532 /* 533 * Register access. 534 */ 535 int (*get_regs_len)(struct dsa_switch *ds, int port); 536 void (*get_regs)(struct dsa_switch *ds, int port, 537 struct ethtool_regs *regs, void *p); 538 539 /* 540 * Upper device tracking. 541 */ 542 int (*port_prechangeupper)(struct dsa_switch *ds, int port, 543 struct netdev_notifier_changeupper_info *info); 544 545 /* 546 * Bridge integration 547 */ 548 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 549 int (*port_bridge_join)(struct dsa_switch *ds, int port, 550 struct net_device *bridge); 551 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 552 struct net_device *bridge); 553 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 554 u8 state); 555 void (*port_fast_age)(struct dsa_switch *ds, int port); 556 int (*port_egress_floods)(struct dsa_switch *ds, int port, 557 bool unicast, bool multicast); 558 559 /* 560 * VLAN support 561 */ 562 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 563 bool vlan_filtering, 564 struct switchdev_trans *trans); 565 int (*port_vlan_prepare)(struct dsa_switch *ds, int port, 566 const struct switchdev_obj_port_vlan *vlan); 567 void (*port_vlan_add)(struct dsa_switch *ds, int port, 568 const struct switchdev_obj_port_vlan *vlan); 569 int (*port_vlan_del)(struct dsa_switch *ds, int port, 570 const struct switchdev_obj_port_vlan *vlan); 571 /* 572 * Forwarding database 573 */ 574 int (*port_fdb_add)(struct dsa_switch *ds, int port, 575 const unsigned char *addr, u16 vid); 576 int (*port_fdb_del)(struct dsa_switch *ds, int port, 577 const unsigned char *addr, u16 vid); 578 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 579 dsa_fdb_dump_cb_t *cb, void *data); 580 581 /* 582 * Multicast database 583 */ 584 int (*port_mdb_prepare)(struct dsa_switch *ds, int port, 585 const struct switchdev_obj_port_mdb *mdb); 586 void (*port_mdb_add)(struct dsa_switch *ds, int port, 587 const struct switchdev_obj_port_mdb *mdb); 588 int (*port_mdb_del)(struct dsa_switch *ds, int port, 589 const struct switchdev_obj_port_mdb *mdb); 590 /* 591 * RXNFC 592 */ 593 int (*get_rxnfc)(struct dsa_switch *ds, int port, 594 struct ethtool_rxnfc *nfc, u32 *rule_locs); 595 int (*set_rxnfc)(struct dsa_switch *ds, int port, 596 struct ethtool_rxnfc *nfc); 597 598 /* 599 * TC integration 600 */ 601 int (*cls_flower_add)(struct dsa_switch *ds, int port, 602 struct flow_cls_offload *cls, bool ingress); 603 int (*cls_flower_del)(struct dsa_switch *ds, int port, 604 struct flow_cls_offload *cls, bool ingress); 605 int (*cls_flower_stats)(struct dsa_switch *ds, int port, 606 struct flow_cls_offload *cls, bool ingress); 607 int (*port_mirror_add)(struct dsa_switch *ds, int port, 608 struct dsa_mall_mirror_tc_entry *mirror, 609 bool ingress); 610 void (*port_mirror_del)(struct dsa_switch *ds, int port, 611 struct dsa_mall_mirror_tc_entry *mirror); 612 int (*port_policer_add)(struct dsa_switch *ds, int port, 613 struct dsa_mall_policer_tc_entry *policer); 614 void (*port_policer_del)(struct dsa_switch *ds, int port); 615 int (*port_setup_tc)(struct dsa_switch *ds, int port, 616 enum tc_setup_type type, void *type_data); 617 618 /* 619 * Cross-chip operations 620 */ 621 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index, 622 int sw_index, int port, 623 struct net_device *br); 624 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index, 625 int sw_index, int port, 626 struct net_device *br); 627 628 /* 629 * PTP functionality 630 */ 631 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 632 struct ifreq *ifr); 633 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 634 struct ifreq *ifr); 635 bool (*port_txtstamp)(struct dsa_switch *ds, int port, 636 struct sk_buff *clone, unsigned int type); 637 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 638 struct sk_buff *skb, unsigned int type); 639 640 /* Devlink parameters, etc */ 641 int (*devlink_param_get)(struct dsa_switch *ds, u32 id, 642 struct devlink_param_gset_ctx *ctx); 643 int (*devlink_param_set)(struct dsa_switch *ds, u32 id, 644 struct devlink_param_gset_ctx *ctx); 645 int (*devlink_info_get)(struct dsa_switch *ds, 646 struct devlink_info_req *req, 647 struct netlink_ext_ack *extack); 648 649 /* 650 * MTU change functionality. Switches can also adjust their MRU through 651 * this method. By MTU, one understands the SDU (L2 payload) length. 652 * If the switch needs to account for the DSA tag on the CPU port, this 653 * method needs to do so privately. 654 */ 655 int (*port_change_mtu)(struct dsa_switch *ds, int port, 656 int new_mtu); 657 int (*port_max_mtu)(struct dsa_switch *ds, int port); 658 }; 659 660 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \ 661 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \ 662 dsa_devlink_param_get, dsa_devlink_param_set, NULL) 663 664 int dsa_devlink_param_get(struct devlink *dl, u32 id, 665 struct devlink_param_gset_ctx *ctx); 666 int dsa_devlink_param_set(struct devlink *dl, u32 id, 667 struct devlink_param_gset_ctx *ctx); 668 int dsa_devlink_params_register(struct dsa_switch *ds, 669 const struct devlink_param *params, 670 size_t params_count); 671 void dsa_devlink_params_unregister(struct dsa_switch *ds, 672 const struct devlink_param *params, 673 size_t params_count); 674 int dsa_devlink_resource_register(struct dsa_switch *ds, 675 const char *resource_name, 676 u64 resource_size, 677 u64 resource_id, 678 u64 parent_resource_id, 679 const struct devlink_resource_size_params *size_params); 680 681 void dsa_devlink_resources_unregister(struct dsa_switch *ds); 682 683 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds, 684 u64 resource_id, 685 devlink_resource_occ_get_t *occ_get, 686 void *occ_get_priv); 687 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds, 688 u64 resource_id); 689 struct devlink_region * 690 dsa_devlink_region_create(struct dsa_switch *ds, 691 const struct devlink_region_ops *ops, 692 u32 region_max_snapshots, u64 region_size); 693 struct devlink_region * 694 dsa_devlink_port_region_create(struct dsa_switch *ds, 695 int port, 696 const struct devlink_port_region_ops *ops, 697 u32 region_max_snapshots, u64 region_size); 698 void dsa_devlink_region_destroy(struct devlink_region *region); 699 700 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev); 701 702 struct dsa_devlink_priv { 703 struct dsa_switch *ds; 704 }; 705 706 static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl) 707 { 708 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 709 710 return dl_priv->ds; 711 } 712 713 static inline 714 struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port) 715 { 716 struct devlink *dl = port->devlink; 717 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 718 719 return dl_priv->ds; 720 } 721 722 static inline int dsa_devlink_port_to_port(struct devlink_port *port) 723 { 724 return port->index; 725 } 726 727 struct dsa_switch_driver { 728 struct list_head list; 729 const struct dsa_switch_ops *ops; 730 }; 731 732 struct net_device *dsa_dev_to_net_device(struct device *dev); 733 734 /* Keep inline for faster access in hot path */ 735 static inline bool netdev_uses_dsa(const struct net_device *dev) 736 { 737 #if IS_ENABLED(CONFIG_NET_DSA) 738 return dev->dsa_ptr && dev->dsa_ptr->rcv; 739 #endif 740 return false; 741 } 742 743 static inline bool dsa_can_decode(const struct sk_buff *skb, 744 struct net_device *dev) 745 { 746 #if IS_ENABLED(CONFIG_NET_DSA) 747 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev); 748 #endif 749 return false; 750 } 751 752 /* All DSA tags that push the EtherType to the right (basically all except tail 753 * tags, which don't break dissection) can be treated the same from the 754 * perspective of the flow dissector. 755 * 756 * We need to return: 757 * - offset: the (B - A) difference between: 758 * A. the position of the real EtherType and 759 * B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes 760 * after the normal EtherType was supposed to be) 761 * The offset in bytes is exactly equal to the tagger overhead (and half of 762 * that, in __be16 shorts). 763 * 764 * - proto: the value of the real EtherType. 765 */ 766 static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb, 767 __be16 *proto, int *offset) 768 { 769 #if IS_ENABLED(CONFIG_NET_DSA) 770 const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops; 771 int tag_len = ops->overhead; 772 773 *offset = tag_len; 774 *proto = ((__be16 *)skb->data)[(tag_len / 2) - 1]; 775 #endif 776 } 777 778 #if IS_ENABLED(CONFIG_NET_DSA) 779 static inline int __dsa_netdevice_ops_check(struct net_device *dev) 780 { 781 int err = -EOPNOTSUPP; 782 783 if (!dev->dsa_ptr) 784 return err; 785 786 if (!dev->dsa_ptr->netdev_ops) 787 return err; 788 789 return 0; 790 } 791 792 static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr, 793 int cmd) 794 { 795 const struct dsa_netdevice_ops *ops; 796 int err; 797 798 err = __dsa_netdevice_ops_check(dev); 799 if (err) 800 return err; 801 802 ops = dev->dsa_ptr->netdev_ops; 803 804 return ops->ndo_do_ioctl(dev, ifr, cmd); 805 } 806 #else 807 static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr, 808 int cmd) 809 { 810 return -EOPNOTSUPP; 811 } 812 #endif 813 814 void dsa_unregister_switch(struct dsa_switch *ds); 815 int dsa_register_switch(struct dsa_switch *ds); 816 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index); 817 #ifdef CONFIG_PM_SLEEP 818 int dsa_switch_suspend(struct dsa_switch *ds); 819 int dsa_switch_resume(struct dsa_switch *ds); 820 #else 821 static inline int dsa_switch_suspend(struct dsa_switch *ds) 822 { 823 return 0; 824 } 825 static inline int dsa_switch_resume(struct dsa_switch *ds) 826 { 827 return 0; 828 } 829 #endif /* CONFIG_PM_SLEEP */ 830 831 enum dsa_notifier_type { 832 DSA_PORT_REGISTER, 833 DSA_PORT_UNREGISTER, 834 }; 835 836 struct dsa_notifier_info { 837 struct net_device *dev; 838 }; 839 840 struct dsa_notifier_register_info { 841 struct dsa_notifier_info info; /* must be first */ 842 struct net_device *master; 843 unsigned int port_number; 844 unsigned int switch_number; 845 }; 846 847 static inline struct net_device * 848 dsa_notifier_info_to_dev(const struct dsa_notifier_info *info) 849 { 850 return info->dev; 851 } 852 853 #if IS_ENABLED(CONFIG_NET_DSA) 854 int register_dsa_notifier(struct notifier_block *nb); 855 int unregister_dsa_notifier(struct notifier_block *nb); 856 int call_dsa_notifiers(unsigned long val, struct net_device *dev, 857 struct dsa_notifier_info *info); 858 #else 859 static inline int register_dsa_notifier(struct notifier_block *nb) 860 { 861 return 0; 862 } 863 864 static inline int unregister_dsa_notifier(struct notifier_block *nb) 865 { 866 return 0; 867 } 868 869 static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev, 870 struct dsa_notifier_info *info) 871 { 872 return NOTIFY_DONE; 873 } 874 #endif 875 876 /* Broadcom tag specific helpers to insert and extract queue/port number */ 877 #define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q) 878 #define BRCM_TAG_GET_PORT(v) ((v) >> 8) 879 #define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff) 880 881 882 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 883 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data); 884 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data); 885 int dsa_port_get_phy_sset_count(struct dsa_port *dp); 886 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 887 888 struct dsa_tag_driver { 889 const struct dsa_device_ops *ops; 890 struct list_head list; 891 struct module *owner; 892 }; 893 894 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 895 unsigned int count, 896 struct module *owner); 897 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 898 unsigned int count); 899 900 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 901 static int __init dsa_tag_driver_module_init(void) \ 902 { \ 903 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 904 THIS_MODULE); \ 905 return 0; \ 906 } \ 907 module_init(dsa_tag_driver_module_init); \ 908 \ 909 static void __exit dsa_tag_driver_module_exit(void) \ 910 { \ 911 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 912 } \ 913 module_exit(dsa_tag_driver_module_exit) 914 915 /** 916 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 917 * drivers 918 * @__ops_array: Array of tag driver strucutres 919 * 920 * Helper macro for DSA tag drivers which do not do anything special 921 * in module init/exit. Each module may only use this macro once, and 922 * calling it replaces module_init() and module_exit(). 923 */ 924 #define module_dsa_tag_drivers(__ops_array) \ 925 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 926 927 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 928 929 /* Create a static structure we can build a linked list of dsa_tag 930 * drivers 931 */ 932 #define DSA_TAG_DRIVER(__ops) \ 933 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 934 .ops = &__ops, \ 935 } 936 937 /** 938 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 939 * driver 940 * @__ops: Single tag driver structures 941 * 942 * Helper macro for DSA tag drivers which do not do anything special 943 * in module init/exit. Each module may only use this macro once, and 944 * calling it replaces module_init() and module_exit(). 945 */ 946 #define module_dsa_tag_driver(__ops) \ 947 DSA_TAG_DRIVER(__ops); \ 948 \ 949 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 950 &DSA_TAG_DRIVER_NAME(__ops) \ 951 }; \ 952 module_dsa_tag_drivers(dsa_tag_driver_array) 953 #endif 954 955