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