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 48 enum dsa_tag_protocol { 49 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, 50 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, 51 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, 52 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, 53 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, 54 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE, 55 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE, 56 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, 57 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, 58 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, 59 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, 60 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, 61 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, 62 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE, 63 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE, 64 DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE, 65 DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_VALUE, 66 }; 67 68 struct packet_type; 69 struct dsa_switch; 70 71 struct dsa_device_ops { 72 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev); 73 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 74 struct packet_type *pt); 75 int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto, 76 int *offset); 77 /* Used to determine which traffic should match the DSA filter in 78 * eth_type_trans, and which, if any, should bypass it and be processed 79 * as regular on the master net device. 80 */ 81 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 82 unsigned int overhead; 83 const char *name; 84 enum dsa_tag_protocol proto; 85 }; 86 87 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-" 88 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \ 89 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE)) 90 91 struct dsa_skb_cb { 92 struct sk_buff *clone; 93 }; 94 95 struct __dsa_skb_cb { 96 struct dsa_skb_cb cb; 97 u8 priv[48 - sizeof(struct dsa_skb_cb)]; 98 }; 99 100 #define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb)) 101 102 #define DSA_SKB_CB_PRIV(skb) \ 103 ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv)) 104 105 struct dsa_switch_tree { 106 struct list_head list; 107 108 /* Notifier chain for switch-wide events */ 109 struct raw_notifier_head nh; 110 111 /* Tree identifier */ 112 unsigned int index; 113 114 /* Number of switches attached to this tree */ 115 struct kref refcount; 116 117 /* Has this tree been applied to the hardware? */ 118 bool setup; 119 120 /* 121 * Configuration data for the platform device that owns 122 * this dsa switch tree instance. 123 */ 124 struct dsa_platform_data *pd; 125 126 /* List of switch ports */ 127 struct list_head ports; 128 129 /* List of DSA links composing the routing table */ 130 struct list_head rtable; 131 }; 132 133 /* TC matchall action types */ 134 enum dsa_port_mall_action_type { 135 DSA_PORT_MALL_MIRROR, 136 DSA_PORT_MALL_POLICER, 137 }; 138 139 /* TC mirroring entry */ 140 struct dsa_mall_mirror_tc_entry { 141 u8 to_local_port; 142 bool ingress; 143 }; 144 145 /* TC port policer entry */ 146 struct dsa_mall_policer_tc_entry { 147 s64 burst; 148 u64 rate_bytes_per_sec; 149 }; 150 151 /* TC matchall entry */ 152 struct dsa_mall_tc_entry { 153 struct list_head list; 154 unsigned long cookie; 155 enum dsa_port_mall_action_type type; 156 union { 157 struct dsa_mall_mirror_tc_entry mirror; 158 struct dsa_mall_policer_tc_entry policer; 159 }; 160 }; 161 162 163 struct dsa_port { 164 /* A CPU port is physically connected to a master device. 165 * A user port exposed to userspace has a slave device. 166 */ 167 union { 168 struct net_device *master; 169 struct net_device *slave; 170 }; 171 172 /* CPU port tagging operations used by master or slave devices */ 173 const struct dsa_device_ops *tag_ops; 174 175 /* Copies for faster access in master receive hot path */ 176 struct dsa_switch_tree *dst; 177 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 178 struct packet_type *pt); 179 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 180 181 enum { 182 DSA_PORT_TYPE_UNUSED = 0, 183 DSA_PORT_TYPE_CPU, 184 DSA_PORT_TYPE_DSA, 185 DSA_PORT_TYPE_USER, 186 } type; 187 188 struct dsa_switch *ds; 189 unsigned int index; 190 const char *name; 191 struct dsa_port *cpu_dp; 192 const char *mac; 193 struct device_node *dn; 194 unsigned int ageing_time; 195 bool vlan_filtering; 196 u8 stp_state; 197 struct net_device *bridge_dev; 198 struct devlink_port devlink_port; 199 struct phylink *pl; 200 struct phylink_config pl_config; 201 202 struct list_head list; 203 204 /* 205 * Give the switch driver somewhere to hang its per-port private data 206 * structures (accessible from the tagger). 207 */ 208 void *priv; 209 210 /* 211 * Original copy of the master netdev ethtool_ops 212 */ 213 const struct ethtool_ops *orig_ethtool_ops; 214 215 /* 216 * Original copy of the master netdev net_device_ops 217 */ 218 const struct net_device_ops *orig_ndo_ops; 219 220 bool setup; 221 }; 222 223 /* TODO: ideally DSA ports would have a single dp->link_dp member, 224 * and no dst->rtable nor this struct dsa_link would be needed, 225 * but this would require some more complex tree walking, 226 * so keep it stupid at the moment and list them all. 227 */ 228 struct dsa_link { 229 struct dsa_port *dp; 230 struct dsa_port *link_dp; 231 struct list_head list; 232 }; 233 234 struct dsa_switch { 235 bool setup; 236 237 struct device *dev; 238 239 /* 240 * Parent switch tree, and switch index. 241 */ 242 struct dsa_switch_tree *dst; 243 unsigned int index; 244 245 /* Listener for switch fabric events */ 246 struct notifier_block nb; 247 248 /* 249 * Give the switch driver somewhere to hang its private data 250 * structure. 251 */ 252 void *priv; 253 254 /* 255 * Configuration data for this switch. 256 */ 257 struct dsa_chip_data *cd; 258 259 /* 260 * The switch operations. 261 */ 262 const struct dsa_switch_ops *ops; 263 264 /* 265 * Slave mii_bus and devices for the individual ports. 266 */ 267 u32 phys_mii_mask; 268 struct mii_bus *slave_mii_bus; 269 270 /* Ageing Time limits in msecs */ 271 unsigned int ageing_time_min; 272 unsigned int ageing_time_max; 273 274 /* devlink used to represent this switch device */ 275 struct devlink *devlink; 276 277 /* Number of switch port queues */ 278 unsigned int num_tx_queues; 279 280 /* Disallow bridge core from requesting different VLAN awareness 281 * settings on ports if not hardware-supported 282 */ 283 bool vlan_filtering_is_global; 284 285 /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges 286 * that have vlan_filtering=0. All drivers should ideally set this (and 287 * then the option would get removed), but it is unknown whether this 288 * would break things or not. 289 */ 290 bool configure_vlan_while_not_filtering; 291 292 /* In case vlan_filtering_is_global is set, the VLAN awareness state 293 * should be retrieved from here and not from the per-port settings. 294 */ 295 bool vlan_filtering; 296 297 /* MAC PCS does not provide link state change interrupt, and requires 298 * polling. Flag passed on to PHYLINK. 299 */ 300 bool pcs_poll; 301 302 /* For switches that only have the MRU configurable. To ensure the 303 * configured MTU is not exceeded, normalization of MRU on all bridged 304 * interfaces is needed. 305 */ 306 bool mtu_enforcement_ingress; 307 308 size_t num_ports; 309 }; 310 311 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 312 { 313 struct dsa_switch_tree *dst = ds->dst; 314 struct dsa_port *dp; 315 316 list_for_each_entry(dp, &dst->ports, list) 317 if (dp->ds == ds && dp->index == p) 318 return dp; 319 320 return NULL; 321 } 322 323 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 324 { 325 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 326 } 327 328 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 329 { 330 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 331 } 332 333 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 334 { 335 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 336 } 337 338 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 339 { 340 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 341 } 342 343 static inline u32 dsa_user_ports(struct dsa_switch *ds) 344 { 345 u32 mask = 0; 346 int p; 347 348 for (p = 0; p < ds->num_ports; p++) 349 if (dsa_is_user_port(ds, p)) 350 mask |= BIT(p); 351 352 return mask; 353 } 354 355 /* Return the local port used to reach an arbitrary switch device */ 356 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device) 357 { 358 struct dsa_switch_tree *dst = ds->dst; 359 struct dsa_link *dl; 360 361 list_for_each_entry(dl, &dst->rtable, list) 362 if (dl->dp->ds == ds && dl->link_dp->ds->index == device) 363 return dl->dp->index; 364 365 return ds->num_ports; 366 } 367 368 /* Return the local port used to reach an arbitrary switch port */ 369 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 370 int port) 371 { 372 if (device == ds->index) 373 return port; 374 else 375 return dsa_routing_port(ds, device); 376 } 377 378 /* Return the local port used to reach the dedicated CPU port */ 379 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 380 { 381 const struct dsa_port *dp = dsa_to_port(ds, port); 382 const struct dsa_port *cpu_dp = dp->cpu_dp; 383 384 if (!cpu_dp) 385 return port; 386 387 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 388 } 389 390 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 391 { 392 const struct dsa_switch *ds = dp->ds; 393 394 if (ds->vlan_filtering_is_global) 395 return ds->vlan_filtering; 396 else 397 return dp->vlan_filtering; 398 } 399 400 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 401 bool is_static, void *data); 402 struct dsa_switch_ops { 403 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 404 int port, 405 enum dsa_tag_protocol mprot); 406 407 int (*setup)(struct dsa_switch *ds); 408 void (*teardown)(struct dsa_switch *ds); 409 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 410 411 /* 412 * Access to the switch's PHY registers. 413 */ 414 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 415 int (*phy_write)(struct dsa_switch *ds, int port, 416 int regnum, u16 val); 417 418 /* 419 * Link state adjustment (called from libphy) 420 */ 421 void (*adjust_link)(struct dsa_switch *ds, int port, 422 struct phy_device *phydev); 423 void (*fixed_link_update)(struct dsa_switch *ds, int port, 424 struct fixed_phy_status *st); 425 426 /* 427 * PHYLINK integration 428 */ 429 void (*phylink_validate)(struct dsa_switch *ds, int port, 430 unsigned long *supported, 431 struct phylink_link_state *state); 432 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 433 struct phylink_link_state *state); 434 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 435 unsigned int mode, 436 const struct phylink_link_state *state); 437 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 438 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 439 unsigned int mode, 440 phy_interface_t interface); 441 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 442 unsigned int mode, 443 phy_interface_t interface, 444 struct phy_device *phydev, 445 int speed, int duplex, 446 bool tx_pause, bool rx_pause); 447 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 448 struct phylink_link_state *state); 449 /* 450 * ethtool hardware statistics. 451 */ 452 void (*get_strings)(struct dsa_switch *ds, int port, 453 u32 stringset, uint8_t *data); 454 void (*get_ethtool_stats)(struct dsa_switch *ds, 455 int port, uint64_t *data); 456 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 457 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 458 int port, uint64_t *data); 459 460 /* 461 * ethtool Wake-on-LAN 462 */ 463 void (*get_wol)(struct dsa_switch *ds, int port, 464 struct ethtool_wolinfo *w); 465 int (*set_wol)(struct dsa_switch *ds, int port, 466 struct ethtool_wolinfo *w); 467 468 /* 469 * ethtool timestamp info 470 */ 471 int (*get_ts_info)(struct dsa_switch *ds, int port, 472 struct ethtool_ts_info *ts); 473 474 /* 475 * Suspend and resume 476 */ 477 int (*suspend)(struct dsa_switch *ds); 478 int (*resume)(struct dsa_switch *ds); 479 480 /* 481 * Port enable/disable 482 */ 483 int (*port_enable)(struct dsa_switch *ds, int port, 484 struct phy_device *phy); 485 void (*port_disable)(struct dsa_switch *ds, int port); 486 487 /* 488 * Port's MAC EEE settings 489 */ 490 int (*set_mac_eee)(struct dsa_switch *ds, int port, 491 struct ethtool_eee *e); 492 int (*get_mac_eee)(struct dsa_switch *ds, int port, 493 struct ethtool_eee *e); 494 495 /* EEPROM access */ 496 int (*get_eeprom_len)(struct dsa_switch *ds); 497 int (*get_eeprom)(struct dsa_switch *ds, 498 struct ethtool_eeprom *eeprom, u8 *data); 499 int (*set_eeprom)(struct dsa_switch *ds, 500 struct ethtool_eeprom *eeprom, u8 *data); 501 502 /* 503 * Register access. 504 */ 505 int (*get_regs_len)(struct dsa_switch *ds, int port); 506 void (*get_regs)(struct dsa_switch *ds, int port, 507 struct ethtool_regs *regs, void *p); 508 509 /* 510 * Bridge integration 511 */ 512 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 513 int (*port_bridge_join)(struct dsa_switch *ds, int port, 514 struct net_device *bridge); 515 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 516 struct net_device *bridge); 517 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 518 u8 state); 519 void (*port_fast_age)(struct dsa_switch *ds, int port); 520 int (*port_egress_floods)(struct dsa_switch *ds, int port, 521 bool unicast, bool multicast); 522 523 /* 524 * VLAN support 525 */ 526 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 527 bool vlan_filtering); 528 int (*port_vlan_prepare)(struct dsa_switch *ds, int port, 529 const struct switchdev_obj_port_vlan *vlan); 530 void (*port_vlan_add)(struct dsa_switch *ds, int port, 531 const struct switchdev_obj_port_vlan *vlan); 532 int (*port_vlan_del)(struct dsa_switch *ds, int port, 533 const struct switchdev_obj_port_vlan *vlan); 534 /* 535 * Forwarding database 536 */ 537 int (*port_fdb_add)(struct dsa_switch *ds, int port, 538 const unsigned char *addr, u16 vid); 539 int (*port_fdb_del)(struct dsa_switch *ds, int port, 540 const unsigned char *addr, u16 vid); 541 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 542 dsa_fdb_dump_cb_t *cb, void *data); 543 544 /* 545 * Multicast database 546 */ 547 int (*port_mdb_prepare)(struct dsa_switch *ds, int port, 548 const struct switchdev_obj_port_mdb *mdb); 549 void (*port_mdb_add)(struct dsa_switch *ds, int port, 550 const struct switchdev_obj_port_mdb *mdb); 551 int (*port_mdb_del)(struct dsa_switch *ds, int port, 552 const struct switchdev_obj_port_mdb *mdb); 553 /* 554 * RXNFC 555 */ 556 int (*get_rxnfc)(struct dsa_switch *ds, int port, 557 struct ethtool_rxnfc *nfc, u32 *rule_locs); 558 int (*set_rxnfc)(struct dsa_switch *ds, int port, 559 struct ethtool_rxnfc *nfc); 560 561 /* 562 * TC integration 563 */ 564 int (*cls_flower_add)(struct dsa_switch *ds, int port, 565 struct flow_cls_offload *cls, bool ingress); 566 int (*cls_flower_del)(struct dsa_switch *ds, int port, 567 struct flow_cls_offload *cls, bool ingress); 568 int (*cls_flower_stats)(struct dsa_switch *ds, int port, 569 struct flow_cls_offload *cls, bool ingress); 570 int (*port_mirror_add)(struct dsa_switch *ds, int port, 571 struct dsa_mall_mirror_tc_entry *mirror, 572 bool ingress); 573 void (*port_mirror_del)(struct dsa_switch *ds, int port, 574 struct dsa_mall_mirror_tc_entry *mirror); 575 int (*port_policer_add)(struct dsa_switch *ds, int port, 576 struct dsa_mall_policer_tc_entry *policer); 577 void (*port_policer_del)(struct dsa_switch *ds, int port); 578 int (*port_setup_tc)(struct dsa_switch *ds, int port, 579 enum tc_setup_type type, void *type_data); 580 581 /* 582 * Cross-chip operations 583 */ 584 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index, 585 int sw_index, int port, 586 struct net_device *br); 587 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index, 588 int sw_index, int port, 589 struct net_device *br); 590 591 /* 592 * PTP functionality 593 */ 594 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 595 struct ifreq *ifr); 596 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 597 struct ifreq *ifr); 598 bool (*port_txtstamp)(struct dsa_switch *ds, int port, 599 struct sk_buff *clone, unsigned int type); 600 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 601 struct sk_buff *skb, unsigned int type); 602 603 /* Devlink parameters */ 604 int (*devlink_param_get)(struct dsa_switch *ds, u32 id, 605 struct devlink_param_gset_ctx *ctx); 606 int (*devlink_param_set)(struct dsa_switch *ds, u32 id, 607 struct devlink_param_gset_ctx *ctx); 608 609 /* 610 * MTU change functionality. Switches can also adjust their MRU through 611 * this method. By MTU, one understands the SDU (L2 payload) length. 612 * If the switch needs to account for the DSA tag on the CPU port, this 613 * method needs to to do so privately. 614 */ 615 int (*port_change_mtu)(struct dsa_switch *ds, int port, 616 int new_mtu); 617 int (*port_max_mtu)(struct dsa_switch *ds, int port); 618 }; 619 620 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \ 621 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \ 622 dsa_devlink_param_get, dsa_devlink_param_set, NULL) 623 624 int dsa_devlink_param_get(struct devlink *dl, u32 id, 625 struct devlink_param_gset_ctx *ctx); 626 int dsa_devlink_param_set(struct devlink *dl, u32 id, 627 struct devlink_param_gset_ctx *ctx); 628 int dsa_devlink_params_register(struct dsa_switch *ds, 629 const struct devlink_param *params, 630 size_t params_count); 631 void dsa_devlink_params_unregister(struct dsa_switch *ds, 632 const struct devlink_param *params, 633 size_t params_count); 634 int dsa_devlink_resource_register(struct dsa_switch *ds, 635 const char *resource_name, 636 u64 resource_size, 637 u64 resource_id, 638 u64 parent_resource_id, 639 const struct devlink_resource_size_params *size_params); 640 641 void dsa_devlink_resources_unregister(struct dsa_switch *ds); 642 643 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds, 644 u64 resource_id, 645 devlink_resource_occ_get_t *occ_get, 646 void *occ_get_priv); 647 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds, 648 u64 resource_id); 649 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev); 650 651 struct dsa_devlink_priv { 652 struct dsa_switch *ds; 653 }; 654 655 struct dsa_switch_driver { 656 struct list_head list; 657 const struct dsa_switch_ops *ops; 658 }; 659 660 struct net_device *dsa_dev_to_net_device(struct device *dev); 661 662 /* Keep inline for faster access in hot path */ 663 static inline bool netdev_uses_dsa(const struct net_device *dev) 664 { 665 #if IS_ENABLED(CONFIG_NET_DSA) 666 return dev->dsa_ptr && dev->dsa_ptr->rcv; 667 #endif 668 return false; 669 } 670 671 static inline bool dsa_can_decode(const struct sk_buff *skb, 672 struct net_device *dev) 673 { 674 #if IS_ENABLED(CONFIG_NET_DSA) 675 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev); 676 #endif 677 return false; 678 } 679 680 void dsa_unregister_switch(struct dsa_switch *ds); 681 int dsa_register_switch(struct dsa_switch *ds); 682 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index); 683 #ifdef CONFIG_PM_SLEEP 684 int dsa_switch_suspend(struct dsa_switch *ds); 685 int dsa_switch_resume(struct dsa_switch *ds); 686 #else 687 static inline int dsa_switch_suspend(struct dsa_switch *ds) 688 { 689 return 0; 690 } 691 static inline int dsa_switch_resume(struct dsa_switch *ds) 692 { 693 return 0; 694 } 695 #endif /* CONFIG_PM_SLEEP */ 696 697 enum dsa_notifier_type { 698 DSA_PORT_REGISTER, 699 DSA_PORT_UNREGISTER, 700 }; 701 702 struct dsa_notifier_info { 703 struct net_device *dev; 704 }; 705 706 struct dsa_notifier_register_info { 707 struct dsa_notifier_info info; /* must be first */ 708 struct net_device *master; 709 unsigned int port_number; 710 unsigned int switch_number; 711 }; 712 713 static inline struct net_device * 714 dsa_notifier_info_to_dev(const struct dsa_notifier_info *info) 715 { 716 return info->dev; 717 } 718 719 #if IS_ENABLED(CONFIG_NET_DSA) 720 int register_dsa_notifier(struct notifier_block *nb); 721 int unregister_dsa_notifier(struct notifier_block *nb); 722 int call_dsa_notifiers(unsigned long val, struct net_device *dev, 723 struct dsa_notifier_info *info); 724 #else 725 static inline int register_dsa_notifier(struct notifier_block *nb) 726 { 727 return 0; 728 } 729 730 static inline int unregister_dsa_notifier(struct notifier_block *nb) 731 { 732 return 0; 733 } 734 735 static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev, 736 struct dsa_notifier_info *info) 737 { 738 return NOTIFY_DONE; 739 } 740 #endif 741 742 /* Broadcom tag specific helpers to insert and extract queue/port number */ 743 #define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q) 744 #define BRCM_TAG_GET_PORT(v) ((v) >> 8) 745 #define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff) 746 747 748 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 749 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data); 750 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data); 751 int dsa_port_get_phy_sset_count(struct dsa_port *dp); 752 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 753 754 struct dsa_tag_driver { 755 const struct dsa_device_ops *ops; 756 struct list_head list; 757 struct module *owner; 758 }; 759 760 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 761 unsigned int count, 762 struct module *owner); 763 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 764 unsigned int count); 765 766 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 767 static int __init dsa_tag_driver_module_init(void) \ 768 { \ 769 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 770 THIS_MODULE); \ 771 return 0; \ 772 } \ 773 module_init(dsa_tag_driver_module_init); \ 774 \ 775 static void __exit dsa_tag_driver_module_exit(void) \ 776 { \ 777 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 778 } \ 779 module_exit(dsa_tag_driver_module_exit) 780 781 /** 782 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 783 * drivers 784 * @__ops_array: Array of tag driver strucutres 785 * 786 * Helper macro for DSA tag drivers which do not do anything special 787 * in module init/exit. Each module may only use this macro once, and 788 * calling it replaces module_init() and module_exit(). 789 */ 790 #define module_dsa_tag_drivers(__ops_array) \ 791 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 792 793 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 794 795 /* Create a static structure we can build a linked list of dsa_tag 796 * drivers 797 */ 798 #define DSA_TAG_DRIVER(__ops) \ 799 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 800 .ops = &__ops, \ 801 } 802 803 /** 804 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 805 * driver 806 * @__ops: Single tag driver structures 807 * 808 * Helper macro for DSA tag drivers which do not do anything special 809 * in module init/exit. Each module may only use this macro once, and 810 * calling it replaces module_init() and module_exit(). 811 */ 812 #define module_dsa_tag_driver(__ops) \ 813 DSA_TAG_DRIVER(__ops); \ 814 \ 815 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 816 &DSA_TAG_DRIVER_NAME(__ops) \ 817 }; \ 818 module_dsa_tag_drivers(dsa_tag_driver_array) 819 #endif 820 821