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