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 /* Let DSA manage the FDB entries towards the CPU, based on the 323 * software bridge database. 324 */ 325 bool assisted_learning_on_cpu_port; 326 327 /* In case vlan_filtering_is_global is set, the VLAN awareness state 328 * should be retrieved from here and not from the per-port settings. 329 */ 330 bool vlan_filtering; 331 332 /* MAC PCS does not provide link state change interrupt, and requires 333 * polling. Flag passed on to PHYLINK. 334 */ 335 bool pcs_poll; 336 337 /* For switches that only have the MRU configurable. To ensure the 338 * configured MTU is not exceeded, normalization of MRU on all bridged 339 * interfaces is needed. 340 */ 341 bool mtu_enforcement_ingress; 342 343 size_t num_ports; 344 }; 345 346 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 347 { 348 struct dsa_switch_tree *dst = ds->dst; 349 struct dsa_port *dp; 350 351 list_for_each_entry(dp, &dst->ports, list) 352 if (dp->ds == ds && dp->index == p) 353 return dp; 354 355 return NULL; 356 } 357 358 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 359 { 360 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 361 } 362 363 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 364 { 365 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 366 } 367 368 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 369 { 370 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 371 } 372 373 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 374 { 375 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 376 } 377 378 static inline u32 dsa_user_ports(struct dsa_switch *ds) 379 { 380 u32 mask = 0; 381 int p; 382 383 for (p = 0; p < ds->num_ports; p++) 384 if (dsa_is_user_port(ds, p)) 385 mask |= BIT(p); 386 387 return mask; 388 } 389 390 /* Return the local port used to reach an arbitrary switch device */ 391 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device) 392 { 393 struct dsa_switch_tree *dst = ds->dst; 394 struct dsa_link *dl; 395 396 list_for_each_entry(dl, &dst->rtable, list) 397 if (dl->dp->ds == ds && dl->link_dp->ds->index == device) 398 return dl->dp->index; 399 400 return ds->num_ports; 401 } 402 403 /* Return the local port used to reach an arbitrary switch port */ 404 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 405 int port) 406 { 407 if (device == ds->index) 408 return port; 409 else 410 return dsa_routing_port(ds, device); 411 } 412 413 /* Return the local port used to reach the dedicated CPU port */ 414 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 415 { 416 const struct dsa_port *dp = dsa_to_port(ds, port); 417 const struct dsa_port *cpu_dp = dp->cpu_dp; 418 419 if (!cpu_dp) 420 return port; 421 422 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 423 } 424 425 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 426 { 427 const struct dsa_switch *ds = dp->ds; 428 429 if (ds->vlan_filtering_is_global) 430 return ds->vlan_filtering; 431 else 432 return dp->vlan_filtering; 433 } 434 435 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 436 bool is_static, void *data); 437 struct dsa_switch_ops { 438 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 439 int port, 440 enum dsa_tag_protocol mprot); 441 442 int (*setup)(struct dsa_switch *ds); 443 void (*teardown)(struct dsa_switch *ds); 444 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 445 446 /* 447 * Access to the switch's PHY registers. 448 */ 449 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 450 int (*phy_write)(struct dsa_switch *ds, int port, 451 int regnum, u16 val); 452 453 /* 454 * Link state adjustment (called from libphy) 455 */ 456 void (*adjust_link)(struct dsa_switch *ds, int port, 457 struct phy_device *phydev); 458 void (*fixed_link_update)(struct dsa_switch *ds, int port, 459 struct fixed_phy_status *st); 460 461 /* 462 * PHYLINK integration 463 */ 464 void (*phylink_validate)(struct dsa_switch *ds, int port, 465 unsigned long *supported, 466 struct phylink_link_state *state); 467 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 468 struct phylink_link_state *state); 469 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 470 unsigned int mode, 471 const struct phylink_link_state *state); 472 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 473 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 474 unsigned int mode, 475 phy_interface_t interface); 476 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 477 unsigned int mode, 478 phy_interface_t interface, 479 struct phy_device *phydev, 480 int speed, int duplex, 481 bool tx_pause, bool rx_pause); 482 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 483 struct phylink_link_state *state); 484 /* 485 * ethtool hardware statistics. 486 */ 487 void (*get_strings)(struct dsa_switch *ds, int port, 488 u32 stringset, uint8_t *data); 489 void (*get_ethtool_stats)(struct dsa_switch *ds, 490 int port, uint64_t *data); 491 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 492 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 493 int port, uint64_t *data); 494 495 /* 496 * ethtool Wake-on-LAN 497 */ 498 void (*get_wol)(struct dsa_switch *ds, int port, 499 struct ethtool_wolinfo *w); 500 int (*set_wol)(struct dsa_switch *ds, int port, 501 struct ethtool_wolinfo *w); 502 503 /* 504 * ethtool timestamp info 505 */ 506 int (*get_ts_info)(struct dsa_switch *ds, int port, 507 struct ethtool_ts_info *ts); 508 509 /* 510 * Suspend and resume 511 */ 512 int (*suspend)(struct dsa_switch *ds); 513 int (*resume)(struct dsa_switch *ds); 514 515 /* 516 * Port enable/disable 517 */ 518 int (*port_enable)(struct dsa_switch *ds, int port, 519 struct phy_device *phy); 520 void (*port_disable)(struct dsa_switch *ds, int port); 521 522 /* 523 * Port's MAC EEE settings 524 */ 525 int (*set_mac_eee)(struct dsa_switch *ds, int port, 526 struct ethtool_eee *e); 527 int (*get_mac_eee)(struct dsa_switch *ds, int port, 528 struct ethtool_eee *e); 529 530 /* EEPROM access */ 531 int (*get_eeprom_len)(struct dsa_switch *ds); 532 int (*get_eeprom)(struct dsa_switch *ds, 533 struct ethtool_eeprom *eeprom, u8 *data); 534 int (*set_eeprom)(struct dsa_switch *ds, 535 struct ethtool_eeprom *eeprom, u8 *data); 536 537 /* 538 * Register access. 539 */ 540 int (*get_regs_len)(struct dsa_switch *ds, int port); 541 void (*get_regs)(struct dsa_switch *ds, int port, 542 struct ethtool_regs *regs, void *p); 543 544 /* 545 * Upper device tracking. 546 */ 547 int (*port_prechangeupper)(struct dsa_switch *ds, int port, 548 struct netdev_notifier_changeupper_info *info); 549 550 /* 551 * Bridge integration 552 */ 553 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 554 int (*port_bridge_join)(struct dsa_switch *ds, int port, 555 struct net_device *bridge); 556 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 557 struct net_device *bridge); 558 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 559 u8 state); 560 void (*port_fast_age)(struct dsa_switch *ds, int port); 561 int (*port_egress_floods)(struct dsa_switch *ds, int port, 562 bool unicast, bool multicast); 563 564 /* 565 * VLAN support 566 */ 567 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 568 bool vlan_filtering); 569 int (*port_vlan_prepare)(struct dsa_switch *ds, int port, 570 const struct switchdev_obj_port_vlan *vlan); 571 void (*port_vlan_add)(struct dsa_switch *ds, int port, 572 const struct switchdev_obj_port_vlan *vlan); 573 int (*port_vlan_del)(struct dsa_switch *ds, int port, 574 const struct switchdev_obj_port_vlan *vlan); 575 /* 576 * Forwarding database 577 */ 578 int (*port_fdb_add)(struct dsa_switch *ds, int port, 579 const unsigned char *addr, u16 vid); 580 int (*port_fdb_del)(struct dsa_switch *ds, int port, 581 const unsigned char *addr, u16 vid); 582 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 583 dsa_fdb_dump_cb_t *cb, void *data); 584 585 /* 586 * Multicast database 587 */ 588 int (*port_mdb_prepare)(struct dsa_switch *ds, int port, 589 const struct switchdev_obj_port_mdb *mdb); 590 void (*port_mdb_add)(struct dsa_switch *ds, int port, 591 const struct switchdev_obj_port_mdb *mdb); 592 int (*port_mdb_del)(struct dsa_switch *ds, int port, 593 const struct switchdev_obj_port_mdb *mdb); 594 /* 595 * RXNFC 596 */ 597 int (*get_rxnfc)(struct dsa_switch *ds, int port, 598 struct ethtool_rxnfc *nfc, u32 *rule_locs); 599 int (*set_rxnfc)(struct dsa_switch *ds, int port, 600 struct ethtool_rxnfc *nfc); 601 602 /* 603 * TC integration 604 */ 605 int (*cls_flower_add)(struct dsa_switch *ds, int port, 606 struct flow_cls_offload *cls, bool ingress); 607 int (*cls_flower_del)(struct dsa_switch *ds, int port, 608 struct flow_cls_offload *cls, bool ingress); 609 int (*cls_flower_stats)(struct dsa_switch *ds, int port, 610 struct flow_cls_offload *cls, bool ingress); 611 int (*port_mirror_add)(struct dsa_switch *ds, int port, 612 struct dsa_mall_mirror_tc_entry *mirror, 613 bool ingress); 614 void (*port_mirror_del)(struct dsa_switch *ds, int port, 615 struct dsa_mall_mirror_tc_entry *mirror); 616 int (*port_policer_add)(struct dsa_switch *ds, int port, 617 struct dsa_mall_policer_tc_entry *policer); 618 void (*port_policer_del)(struct dsa_switch *ds, int port); 619 int (*port_setup_tc)(struct dsa_switch *ds, int port, 620 enum tc_setup_type type, void *type_data); 621 622 /* 623 * Cross-chip operations 624 */ 625 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index, 626 int sw_index, int port, 627 struct net_device *br); 628 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index, 629 int sw_index, int port, 630 struct net_device *br); 631 632 /* 633 * PTP functionality 634 */ 635 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 636 struct ifreq *ifr); 637 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 638 struct ifreq *ifr); 639 bool (*port_txtstamp)(struct dsa_switch *ds, int port, 640 struct sk_buff *clone, unsigned int type); 641 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 642 struct sk_buff *skb, unsigned int type); 643 644 /* Devlink parameters, etc */ 645 int (*devlink_param_get)(struct dsa_switch *ds, u32 id, 646 struct devlink_param_gset_ctx *ctx); 647 int (*devlink_param_set)(struct dsa_switch *ds, u32 id, 648 struct devlink_param_gset_ctx *ctx); 649 int (*devlink_info_get)(struct dsa_switch *ds, 650 struct devlink_info_req *req, 651 struct netlink_ext_ack *extack); 652 653 /* 654 * MTU change functionality. Switches can also adjust their MRU through 655 * this method. By MTU, one understands the SDU (L2 payload) length. 656 * If the switch needs to account for the DSA tag on the CPU port, this 657 * method needs to do so privately. 658 */ 659 int (*port_change_mtu)(struct dsa_switch *ds, int port, 660 int new_mtu); 661 int (*port_max_mtu)(struct dsa_switch *ds, int port); 662 }; 663 664 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \ 665 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \ 666 dsa_devlink_param_get, dsa_devlink_param_set, NULL) 667 668 int dsa_devlink_param_get(struct devlink *dl, u32 id, 669 struct devlink_param_gset_ctx *ctx); 670 int dsa_devlink_param_set(struct devlink *dl, u32 id, 671 struct devlink_param_gset_ctx *ctx); 672 int dsa_devlink_params_register(struct dsa_switch *ds, 673 const struct devlink_param *params, 674 size_t params_count); 675 void dsa_devlink_params_unregister(struct dsa_switch *ds, 676 const struct devlink_param *params, 677 size_t params_count); 678 int dsa_devlink_resource_register(struct dsa_switch *ds, 679 const char *resource_name, 680 u64 resource_size, 681 u64 resource_id, 682 u64 parent_resource_id, 683 const struct devlink_resource_size_params *size_params); 684 685 void dsa_devlink_resources_unregister(struct dsa_switch *ds); 686 687 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds, 688 u64 resource_id, 689 devlink_resource_occ_get_t *occ_get, 690 void *occ_get_priv); 691 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds, 692 u64 resource_id); 693 struct devlink_region * 694 dsa_devlink_region_create(struct dsa_switch *ds, 695 const struct devlink_region_ops *ops, 696 u32 region_max_snapshots, u64 region_size); 697 struct devlink_region * 698 dsa_devlink_port_region_create(struct dsa_switch *ds, 699 int port, 700 const struct devlink_port_region_ops *ops, 701 u32 region_max_snapshots, u64 region_size); 702 void dsa_devlink_region_destroy(struct devlink_region *region); 703 704 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev); 705 706 struct dsa_devlink_priv { 707 struct dsa_switch *ds; 708 }; 709 710 static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl) 711 { 712 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 713 714 return dl_priv->ds; 715 } 716 717 static inline 718 struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port) 719 { 720 struct devlink *dl = port->devlink; 721 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 722 723 return dl_priv->ds; 724 } 725 726 static inline int dsa_devlink_port_to_port(struct devlink_port *port) 727 { 728 return port->index; 729 } 730 731 struct dsa_switch_driver { 732 struct list_head list; 733 const struct dsa_switch_ops *ops; 734 }; 735 736 struct net_device *dsa_dev_to_net_device(struct device *dev); 737 738 /* Keep inline for faster access in hot path */ 739 static inline bool netdev_uses_dsa(const struct net_device *dev) 740 { 741 #if IS_ENABLED(CONFIG_NET_DSA) 742 return dev->dsa_ptr && dev->dsa_ptr->rcv; 743 #endif 744 return false; 745 } 746 747 static inline bool dsa_can_decode(const struct sk_buff *skb, 748 struct net_device *dev) 749 { 750 #if IS_ENABLED(CONFIG_NET_DSA) 751 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev); 752 #endif 753 return false; 754 } 755 756 /* All DSA tags that push the EtherType to the right (basically all except tail 757 * tags, which don't break dissection) can be treated the same from the 758 * perspective of the flow dissector. 759 * 760 * We need to return: 761 * - offset: the (B - A) difference between: 762 * A. the position of the real EtherType and 763 * B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes 764 * after the normal EtherType was supposed to be) 765 * The offset in bytes is exactly equal to the tagger overhead (and half of 766 * that, in __be16 shorts). 767 * 768 * - proto: the value of the real EtherType. 769 */ 770 static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb, 771 __be16 *proto, int *offset) 772 { 773 #if IS_ENABLED(CONFIG_NET_DSA) 774 const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops; 775 int tag_len = ops->overhead; 776 777 *offset = tag_len; 778 *proto = ((__be16 *)skb->data)[(tag_len / 2) - 1]; 779 #endif 780 } 781 782 #if IS_ENABLED(CONFIG_NET_DSA) 783 static inline int __dsa_netdevice_ops_check(struct net_device *dev) 784 { 785 int err = -EOPNOTSUPP; 786 787 if (!dev->dsa_ptr) 788 return err; 789 790 if (!dev->dsa_ptr->netdev_ops) 791 return err; 792 793 return 0; 794 } 795 796 static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr, 797 int cmd) 798 { 799 const struct dsa_netdevice_ops *ops; 800 int err; 801 802 err = __dsa_netdevice_ops_check(dev); 803 if (err) 804 return err; 805 806 ops = dev->dsa_ptr->netdev_ops; 807 808 return ops->ndo_do_ioctl(dev, ifr, cmd); 809 } 810 #else 811 static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr, 812 int cmd) 813 { 814 return -EOPNOTSUPP; 815 } 816 #endif 817 818 void dsa_unregister_switch(struct dsa_switch *ds); 819 int dsa_register_switch(struct dsa_switch *ds); 820 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index); 821 #ifdef CONFIG_PM_SLEEP 822 int dsa_switch_suspend(struct dsa_switch *ds); 823 int dsa_switch_resume(struct dsa_switch *ds); 824 #else 825 static inline int dsa_switch_suspend(struct dsa_switch *ds) 826 { 827 return 0; 828 } 829 static inline int dsa_switch_resume(struct dsa_switch *ds) 830 { 831 return 0; 832 } 833 #endif /* CONFIG_PM_SLEEP */ 834 835 #if IS_ENABLED(CONFIG_NET_DSA) 836 bool dsa_slave_dev_check(const struct net_device *dev); 837 #else 838 static inline bool dsa_slave_dev_check(const struct net_device *dev) 839 { 840 return false; 841 } 842 #endif 843 844 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 845 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data); 846 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data); 847 int dsa_port_get_phy_sset_count(struct dsa_port *dp); 848 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 849 850 struct dsa_tag_driver { 851 const struct dsa_device_ops *ops; 852 struct list_head list; 853 struct module *owner; 854 }; 855 856 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 857 unsigned int count, 858 struct module *owner); 859 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 860 unsigned int count); 861 862 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 863 static int __init dsa_tag_driver_module_init(void) \ 864 { \ 865 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 866 THIS_MODULE); \ 867 return 0; \ 868 } \ 869 module_init(dsa_tag_driver_module_init); \ 870 \ 871 static void __exit dsa_tag_driver_module_exit(void) \ 872 { \ 873 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 874 } \ 875 module_exit(dsa_tag_driver_module_exit) 876 877 /** 878 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 879 * drivers 880 * @__ops_array: Array of tag driver strucutres 881 * 882 * Helper macro for DSA tag drivers which do not do anything special 883 * in module init/exit. Each module may only use this macro once, and 884 * calling it replaces module_init() and module_exit(). 885 */ 886 #define module_dsa_tag_drivers(__ops_array) \ 887 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 888 889 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 890 891 /* Create a static structure we can build a linked list of dsa_tag 892 * drivers 893 */ 894 #define DSA_TAG_DRIVER(__ops) \ 895 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 896 .ops = &__ops, \ 897 } 898 899 /** 900 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 901 * driver 902 * @__ops: Single tag driver structures 903 * 904 * Helper macro for DSA tag drivers which do not do anything special 905 * in module init/exit. Each module may only use this macro once, and 906 * calling it replaces module_init() and module_exit(). 907 */ 908 #define module_dsa_tag_driver(__ops) \ 909 DSA_TAG_DRIVER(__ops); \ 910 \ 911 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 912 &DSA_TAG_DRIVER_NAME(__ops) \ 913 }; \ 914 module_dsa_tag_drivers(dsa_tag_driver_array) 915 #endif 916 917