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 #define DSA_TAG_PROTO_XRS700X_VALUE 19 50 #define DSA_TAG_PROTO_OCELOT_8021Q_VALUE 20 51 #define DSA_TAG_PROTO_SEVILLE_VALUE 21 52 #define DSA_TAG_PROTO_BRCM_LEGACY_VALUE 22 53 #define DSA_TAG_PROTO_SJA1110_VALUE 23 54 #define DSA_TAG_PROTO_RTL8_4_VALUE 24 55 #define DSA_TAG_PROTO_RTL8_4T_VALUE 25 56 57 enum dsa_tag_protocol { 58 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, 59 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, 60 DSA_TAG_PROTO_BRCM_LEGACY = DSA_TAG_PROTO_BRCM_LEGACY_VALUE, 61 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, 62 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, 63 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, 64 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE, 65 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE, 66 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, 67 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, 68 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, 69 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, 70 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, 71 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, 72 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE, 73 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE, 74 DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE, 75 DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_VALUE, 76 DSA_TAG_PROTO_RTL4_A = DSA_TAG_PROTO_RTL4_A_VALUE, 77 DSA_TAG_PROTO_HELLCREEK = DSA_TAG_PROTO_HELLCREEK_VALUE, 78 DSA_TAG_PROTO_XRS700X = DSA_TAG_PROTO_XRS700X_VALUE, 79 DSA_TAG_PROTO_OCELOT_8021Q = DSA_TAG_PROTO_OCELOT_8021Q_VALUE, 80 DSA_TAG_PROTO_SEVILLE = DSA_TAG_PROTO_SEVILLE_VALUE, 81 DSA_TAG_PROTO_SJA1110 = DSA_TAG_PROTO_SJA1110_VALUE, 82 DSA_TAG_PROTO_RTL8_4 = DSA_TAG_PROTO_RTL8_4_VALUE, 83 DSA_TAG_PROTO_RTL8_4T = DSA_TAG_PROTO_RTL8_4T_VALUE, 84 }; 85 86 struct dsa_switch; 87 88 struct dsa_device_ops { 89 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev); 90 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev); 91 void (*flow_dissect)(const struct sk_buff *skb, __be16 *proto, 92 int *offset); 93 int (*connect)(struct dsa_switch *ds); 94 void (*disconnect)(struct dsa_switch *ds); 95 unsigned int needed_headroom; 96 unsigned int needed_tailroom; 97 const char *name; 98 enum dsa_tag_protocol proto; 99 /* Some tagging protocols either mangle or shift the destination MAC 100 * address, in which case the DSA master would drop packets on ingress 101 * if what it understands out of the destination MAC address is not in 102 * its RX filter. 103 */ 104 bool promisc_on_master; 105 }; 106 107 /* This structure defines the control interfaces that are overlayed by the 108 * DSA layer on top of the DSA CPU/management net_device instance. This is 109 * used by the core net_device layer while calling various net_device_ops 110 * function pointers. 111 */ 112 struct dsa_netdevice_ops { 113 int (*ndo_eth_ioctl)(struct net_device *dev, struct ifreq *ifr, 114 int cmd); 115 }; 116 117 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-" 118 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \ 119 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE)) 120 121 struct dsa_lag { 122 struct net_device *dev; 123 unsigned int id; 124 struct mutex fdb_lock; 125 struct list_head fdbs; 126 refcount_t refcount; 127 }; 128 129 struct dsa_switch_tree { 130 struct list_head list; 131 132 /* List of switch ports */ 133 struct list_head ports; 134 135 /* Notifier chain for switch-wide events */ 136 struct raw_notifier_head nh; 137 138 /* Tree identifier */ 139 unsigned int index; 140 141 /* Number of switches attached to this tree */ 142 struct kref refcount; 143 144 /* Maps offloaded LAG netdevs to a zero-based linear ID for 145 * drivers that need it. 146 */ 147 struct dsa_lag **lags; 148 149 /* Tagging protocol operations */ 150 const struct dsa_device_ops *tag_ops; 151 152 /* Default tagging protocol preferred by the switches in this 153 * tree. 154 */ 155 enum dsa_tag_protocol default_proto; 156 157 /* Has this tree been applied to the hardware? */ 158 bool setup; 159 160 /* 161 * Configuration data for the platform device that owns 162 * this dsa switch tree instance. 163 */ 164 struct dsa_platform_data *pd; 165 166 /* List of DSA links composing the routing table */ 167 struct list_head rtable; 168 169 /* Length of "lags" array */ 170 unsigned int lags_len; 171 172 /* Track the largest switch index within a tree */ 173 unsigned int last_switch; 174 }; 175 176 /* LAG IDs are one-based, the dst->lags array is zero-based */ 177 #define dsa_lags_foreach_id(_id, _dst) \ 178 for ((_id) = 1; (_id) <= (_dst)->lags_len; (_id)++) \ 179 if ((_dst)->lags[(_id) - 1]) 180 181 #define dsa_lag_foreach_port(_dp, _dst, _lag) \ 182 list_for_each_entry((_dp), &(_dst)->ports, list) \ 183 if (dsa_port_offloads_lag((_dp), (_lag))) 184 185 #define dsa_hsr_foreach_port(_dp, _ds, _hsr) \ 186 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \ 187 if ((_dp)->ds == (_ds) && (_dp)->hsr_dev == (_hsr)) 188 189 static inline struct dsa_lag *dsa_lag_by_id(struct dsa_switch_tree *dst, 190 unsigned int id) 191 { 192 /* DSA LAG IDs are one-based, dst->lags is zero-based */ 193 return dst->lags[id - 1]; 194 } 195 196 static inline int dsa_lag_id(struct dsa_switch_tree *dst, 197 struct net_device *lag_dev) 198 { 199 unsigned int id; 200 201 dsa_lags_foreach_id(id, dst) { 202 struct dsa_lag *lag = dsa_lag_by_id(dst, id); 203 204 if (lag->dev == lag_dev) 205 return lag->id; 206 } 207 208 return -ENODEV; 209 } 210 211 /* TC matchall action types */ 212 enum dsa_port_mall_action_type { 213 DSA_PORT_MALL_MIRROR, 214 DSA_PORT_MALL_POLICER, 215 }; 216 217 /* TC mirroring entry */ 218 struct dsa_mall_mirror_tc_entry { 219 u8 to_local_port; 220 bool ingress; 221 }; 222 223 /* TC port policer entry */ 224 struct dsa_mall_policer_tc_entry { 225 u32 burst; 226 u64 rate_bytes_per_sec; 227 }; 228 229 /* TC matchall entry */ 230 struct dsa_mall_tc_entry { 231 struct list_head list; 232 unsigned long cookie; 233 enum dsa_port_mall_action_type type; 234 union { 235 struct dsa_mall_mirror_tc_entry mirror; 236 struct dsa_mall_policer_tc_entry policer; 237 }; 238 }; 239 240 struct dsa_bridge { 241 struct net_device *dev; 242 unsigned int num; 243 bool tx_fwd_offload; 244 refcount_t refcount; 245 }; 246 247 struct dsa_port { 248 /* A CPU port is physically connected to a master device. 249 * A user port exposed to userspace has a slave device. 250 */ 251 union { 252 struct net_device *master; 253 struct net_device *slave; 254 }; 255 256 /* Copy of the tagging protocol operations, for quicker access 257 * in the data path. Valid only for the CPU ports. 258 */ 259 const struct dsa_device_ops *tag_ops; 260 261 /* Copies for faster access in master receive hot path */ 262 struct dsa_switch_tree *dst; 263 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev); 264 265 struct dsa_switch *ds; 266 267 unsigned int index; 268 269 enum { 270 DSA_PORT_TYPE_UNUSED = 0, 271 DSA_PORT_TYPE_CPU, 272 DSA_PORT_TYPE_DSA, 273 DSA_PORT_TYPE_USER, 274 } type; 275 276 const char *name; 277 struct dsa_port *cpu_dp; 278 u8 mac[ETH_ALEN]; 279 280 u8 stp_state; 281 282 /* Warning: the following bit fields are not atomic, and updating them 283 * can only be done from code paths where concurrency is not possible 284 * (probe time or under rtnl_lock). 285 */ 286 u8 vlan_filtering:1; 287 288 /* Managed by DSA on user ports and by drivers on CPU and DSA ports */ 289 u8 learning:1; 290 291 u8 lag_tx_enabled:1; 292 293 u8 devlink_port_setup:1; 294 295 /* Master state bits, valid only on CPU ports */ 296 u8 master_admin_up:1; 297 u8 master_oper_up:1; 298 299 u8 setup:1; 300 301 struct device_node *dn; 302 unsigned int ageing_time; 303 304 struct dsa_bridge *bridge; 305 struct devlink_port devlink_port; 306 struct phylink *pl; 307 struct phylink_config pl_config; 308 struct dsa_lag *lag; 309 struct net_device *hsr_dev; 310 311 struct list_head list; 312 313 /* 314 * Original copy of the master netdev ethtool_ops 315 */ 316 const struct ethtool_ops *orig_ethtool_ops; 317 318 /* 319 * Original copy of the master netdev net_device_ops 320 */ 321 const struct dsa_netdevice_ops *netdev_ops; 322 323 /* List of MAC addresses that must be forwarded on this port. 324 * These are only valid on CPU ports and DSA links. 325 */ 326 struct mutex addr_lists_lock; 327 struct list_head fdbs; 328 struct list_head mdbs; 329 330 /* List of VLANs that CPU and DSA ports are members of. */ 331 struct mutex vlans_lock; 332 struct list_head vlans; 333 }; 334 335 /* TODO: ideally DSA ports would have a single dp->link_dp member, 336 * and no dst->rtable nor this struct dsa_link would be needed, 337 * but this would require some more complex tree walking, 338 * so keep it stupid at the moment and list them all. 339 */ 340 struct dsa_link { 341 struct dsa_port *dp; 342 struct dsa_port *link_dp; 343 struct list_head list; 344 }; 345 346 enum dsa_db_type { 347 DSA_DB_PORT, 348 DSA_DB_LAG, 349 DSA_DB_BRIDGE, 350 }; 351 352 struct dsa_db { 353 enum dsa_db_type type; 354 355 union { 356 const struct dsa_port *dp; 357 struct dsa_lag lag; 358 struct dsa_bridge bridge; 359 }; 360 }; 361 362 struct dsa_mac_addr { 363 unsigned char addr[ETH_ALEN]; 364 u16 vid; 365 refcount_t refcount; 366 struct list_head list; 367 struct dsa_db db; 368 }; 369 370 struct dsa_vlan { 371 u16 vid; 372 refcount_t refcount; 373 struct list_head list; 374 }; 375 376 struct dsa_switch { 377 struct device *dev; 378 379 /* 380 * Parent switch tree, and switch index. 381 */ 382 struct dsa_switch_tree *dst; 383 unsigned int index; 384 385 /* Warning: the following bit fields are not atomic, and updating them 386 * can only be done from code paths where concurrency is not possible 387 * (probe time or under rtnl_lock). 388 */ 389 u32 setup:1; 390 391 /* Disallow bridge core from requesting different VLAN awareness 392 * settings on ports if not hardware-supported 393 */ 394 u32 vlan_filtering_is_global:1; 395 396 /* Keep VLAN filtering enabled on ports not offloading any upper */ 397 u32 needs_standalone_vlan_filtering:1; 398 399 /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges 400 * that have vlan_filtering=0. All drivers should ideally set this (and 401 * then the option would get removed), but it is unknown whether this 402 * would break things or not. 403 */ 404 u32 configure_vlan_while_not_filtering:1; 405 406 /* If the switch driver always programs the CPU port as egress tagged 407 * despite the VLAN configuration indicating otherwise, then setting 408 * @untag_bridge_pvid will force the DSA receive path to pop the 409 * bridge's default_pvid VLAN tagged frames to offer a consistent 410 * behavior between a vlan_filtering=0 and vlan_filtering=1 bridge 411 * device. 412 */ 413 u32 untag_bridge_pvid:1; 414 415 /* Let DSA manage the FDB entries towards the 416 * CPU, based on the software bridge database. 417 */ 418 u32 assisted_learning_on_cpu_port:1; 419 420 /* In case vlan_filtering_is_global is set, the VLAN awareness state 421 * should be retrieved from here and not from the per-port settings. 422 */ 423 u32 vlan_filtering:1; 424 425 /* For switches that only have the MRU configurable. To ensure the 426 * configured MTU is not exceeded, normalization of MRU on all bridged 427 * interfaces is needed. 428 */ 429 u32 mtu_enforcement_ingress:1; 430 431 /* Drivers that isolate the FDBs of multiple bridges must set this 432 * to true to receive the bridge as an argument in .port_fdb_{add,del} 433 * and .port_mdb_{add,del}. Otherwise, the bridge.num will always be 434 * passed as zero. 435 */ 436 u32 fdb_isolation:1; 437 438 /* Listener for switch fabric events */ 439 struct notifier_block nb; 440 441 /* 442 * Give the switch driver somewhere to hang its private data 443 * structure. 444 */ 445 void *priv; 446 447 void *tagger_data; 448 449 /* 450 * Configuration data for this switch. 451 */ 452 struct dsa_chip_data *cd; 453 454 /* 455 * The switch operations. 456 */ 457 const struct dsa_switch_ops *ops; 458 459 /* 460 * Slave mii_bus and devices for the individual ports. 461 */ 462 u32 phys_mii_mask; 463 struct mii_bus *slave_mii_bus; 464 465 /* Ageing Time limits in msecs */ 466 unsigned int ageing_time_min; 467 unsigned int ageing_time_max; 468 469 /* Storage for drivers using tag_8021q */ 470 struct dsa_8021q_context *tag_8021q_ctx; 471 472 /* devlink used to represent this switch device */ 473 struct devlink *devlink; 474 475 /* Number of switch port queues */ 476 unsigned int num_tx_queues; 477 478 /* Drivers that benefit from having an ID associated with each 479 * offloaded LAG should set this to the maximum number of 480 * supported IDs. DSA will then maintain a mapping of _at 481 * least_ these many IDs, accessible to drivers via 482 * dsa_lag_id(). 483 */ 484 unsigned int num_lag_ids; 485 486 /* Drivers that support bridge forwarding offload or FDB isolation 487 * should set this to the maximum number of bridges spanning the same 488 * switch tree (or all trees, in the case of cross-tree bridging 489 * support) that can be offloaded. 490 */ 491 unsigned int max_num_bridges; 492 493 unsigned int num_ports; 494 }; 495 496 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 497 { 498 struct dsa_switch_tree *dst = ds->dst; 499 struct dsa_port *dp; 500 501 list_for_each_entry(dp, &dst->ports, list) 502 if (dp->ds == ds && dp->index == p) 503 return dp; 504 505 return NULL; 506 } 507 508 static inline bool dsa_port_is_dsa(struct dsa_port *port) 509 { 510 return port->type == DSA_PORT_TYPE_DSA; 511 } 512 513 static inline bool dsa_port_is_cpu(struct dsa_port *port) 514 { 515 return port->type == DSA_PORT_TYPE_CPU; 516 } 517 518 static inline bool dsa_port_is_user(struct dsa_port *dp) 519 { 520 return dp->type == DSA_PORT_TYPE_USER; 521 } 522 523 static inline bool dsa_port_is_unused(struct dsa_port *dp) 524 { 525 return dp->type == DSA_PORT_TYPE_UNUSED; 526 } 527 528 static inline bool dsa_port_master_is_operational(struct dsa_port *dp) 529 { 530 return dsa_port_is_cpu(dp) && dp->master_admin_up && 531 dp->master_oper_up; 532 } 533 534 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 535 { 536 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 537 } 538 539 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 540 { 541 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 542 } 543 544 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 545 { 546 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 547 } 548 549 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 550 { 551 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 552 } 553 554 #define dsa_tree_for_each_user_port(_dp, _dst) \ 555 list_for_each_entry((_dp), &(_dst)->ports, list) \ 556 if (dsa_port_is_user((_dp))) 557 558 #define dsa_switch_for_each_port(_dp, _ds) \ 559 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \ 560 if ((_dp)->ds == (_ds)) 561 562 #define dsa_switch_for_each_port_safe(_dp, _next, _ds) \ 563 list_for_each_entry_safe((_dp), (_next), &(_ds)->dst->ports, list) \ 564 if ((_dp)->ds == (_ds)) 565 566 #define dsa_switch_for_each_port_continue_reverse(_dp, _ds) \ 567 list_for_each_entry_continue_reverse((_dp), &(_ds)->dst->ports, list) \ 568 if ((_dp)->ds == (_ds)) 569 570 #define dsa_switch_for_each_available_port(_dp, _ds) \ 571 dsa_switch_for_each_port((_dp), (_ds)) \ 572 if (!dsa_port_is_unused((_dp))) 573 574 #define dsa_switch_for_each_user_port(_dp, _ds) \ 575 dsa_switch_for_each_port((_dp), (_ds)) \ 576 if (dsa_port_is_user((_dp))) 577 578 #define dsa_switch_for_each_cpu_port(_dp, _ds) \ 579 dsa_switch_for_each_port((_dp), (_ds)) \ 580 if (dsa_port_is_cpu((_dp))) 581 582 #define dsa_switch_for_each_cpu_port_continue_reverse(_dp, _ds) \ 583 dsa_switch_for_each_port_continue_reverse((_dp), (_ds)) \ 584 if (dsa_port_is_cpu((_dp))) 585 586 static inline u32 dsa_user_ports(struct dsa_switch *ds) 587 { 588 struct dsa_port *dp; 589 u32 mask = 0; 590 591 dsa_switch_for_each_user_port(dp, ds) 592 mask |= BIT(dp->index); 593 594 return mask; 595 } 596 597 static inline u32 dsa_cpu_ports(struct dsa_switch *ds) 598 { 599 struct dsa_port *cpu_dp; 600 u32 mask = 0; 601 602 dsa_switch_for_each_cpu_port(cpu_dp, ds) 603 mask |= BIT(cpu_dp->index); 604 605 return mask; 606 } 607 608 /* Return the local port used to reach an arbitrary switch device */ 609 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device) 610 { 611 struct dsa_switch_tree *dst = ds->dst; 612 struct dsa_link *dl; 613 614 list_for_each_entry(dl, &dst->rtable, list) 615 if (dl->dp->ds == ds && dl->link_dp->ds->index == device) 616 return dl->dp->index; 617 618 return ds->num_ports; 619 } 620 621 /* Return the local port used to reach an arbitrary switch port */ 622 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 623 int port) 624 { 625 if (device == ds->index) 626 return port; 627 else 628 return dsa_routing_port(ds, device); 629 } 630 631 /* Return the local port used to reach the dedicated CPU port */ 632 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 633 { 634 const struct dsa_port *dp = dsa_to_port(ds, port); 635 const struct dsa_port *cpu_dp = dp->cpu_dp; 636 637 if (!cpu_dp) 638 return port; 639 640 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 641 } 642 643 /* Return true if this is the local port used to reach the CPU port */ 644 static inline bool dsa_is_upstream_port(struct dsa_switch *ds, int port) 645 { 646 if (dsa_is_unused_port(ds, port)) 647 return false; 648 649 return port == dsa_upstream_port(ds, port); 650 } 651 652 /* Return true if this is a DSA port leading away from the CPU */ 653 static inline bool dsa_is_downstream_port(struct dsa_switch *ds, int port) 654 { 655 return dsa_is_dsa_port(ds, port) && !dsa_is_upstream_port(ds, port); 656 } 657 658 /* Return the local port used to reach the CPU port */ 659 static inline unsigned int dsa_switch_upstream_port(struct dsa_switch *ds) 660 { 661 struct dsa_port *dp; 662 663 dsa_switch_for_each_available_port(dp, ds) { 664 return dsa_upstream_port(ds, dp->index); 665 } 666 667 return ds->num_ports; 668 } 669 670 /* Return true if @upstream_ds is an upstream switch of @downstream_ds, meaning 671 * that the routing port from @downstream_ds to @upstream_ds is also the port 672 * which @downstream_ds uses to reach its dedicated CPU. 673 */ 674 static inline bool dsa_switch_is_upstream_of(struct dsa_switch *upstream_ds, 675 struct dsa_switch *downstream_ds) 676 { 677 int routing_port; 678 679 if (upstream_ds == downstream_ds) 680 return true; 681 682 routing_port = dsa_routing_port(downstream_ds, upstream_ds->index); 683 684 return dsa_is_upstream_port(downstream_ds, routing_port); 685 } 686 687 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 688 { 689 const struct dsa_switch *ds = dp->ds; 690 691 if (ds->vlan_filtering_is_global) 692 return ds->vlan_filtering; 693 else 694 return dp->vlan_filtering; 695 } 696 697 static inline unsigned int dsa_port_lag_id_get(struct dsa_port *dp) 698 { 699 return dp->lag ? dp->lag->id : 0; 700 } 701 702 static inline struct net_device *dsa_port_lag_dev_get(struct dsa_port *dp) 703 { 704 return dp->lag ? dp->lag->dev : NULL; 705 } 706 707 static inline bool dsa_port_offloads_lag(struct dsa_port *dp, 708 const struct dsa_lag *lag) 709 { 710 return dsa_port_lag_dev_get(dp) == lag->dev; 711 } 712 713 static inline 714 struct net_device *dsa_port_to_bridge_port(const struct dsa_port *dp) 715 { 716 if (!dp->bridge) 717 return NULL; 718 719 if (dp->lag) 720 return dp->lag->dev; 721 else if (dp->hsr_dev) 722 return dp->hsr_dev; 723 724 return dp->slave; 725 } 726 727 static inline struct net_device * 728 dsa_port_bridge_dev_get(const struct dsa_port *dp) 729 { 730 return dp->bridge ? dp->bridge->dev : NULL; 731 } 732 733 static inline unsigned int dsa_port_bridge_num_get(struct dsa_port *dp) 734 { 735 return dp->bridge ? dp->bridge->num : 0; 736 } 737 738 static inline bool dsa_port_bridge_same(const struct dsa_port *a, 739 const struct dsa_port *b) 740 { 741 struct net_device *br_a = dsa_port_bridge_dev_get(a); 742 struct net_device *br_b = dsa_port_bridge_dev_get(b); 743 744 /* Standalone ports are not in the same bridge with one another */ 745 return (!br_a || !br_b) ? false : (br_a == br_b); 746 } 747 748 static inline bool dsa_port_offloads_bridge_port(struct dsa_port *dp, 749 const struct net_device *dev) 750 { 751 return dsa_port_to_bridge_port(dp) == dev; 752 } 753 754 static inline bool 755 dsa_port_offloads_bridge_dev(struct dsa_port *dp, 756 const struct net_device *bridge_dev) 757 { 758 /* DSA ports connected to a bridge, and event was emitted 759 * for the bridge. 760 */ 761 return dsa_port_bridge_dev_get(dp) == bridge_dev; 762 } 763 764 static inline bool dsa_port_offloads_bridge(struct dsa_port *dp, 765 const struct dsa_bridge *bridge) 766 { 767 return dsa_port_bridge_dev_get(dp) == bridge->dev; 768 } 769 770 /* Returns true if any port of this tree offloads the given net_device */ 771 static inline bool dsa_tree_offloads_bridge_port(struct dsa_switch_tree *dst, 772 const struct net_device *dev) 773 { 774 struct dsa_port *dp; 775 776 list_for_each_entry(dp, &dst->ports, list) 777 if (dsa_port_offloads_bridge_port(dp, dev)) 778 return true; 779 780 return false; 781 } 782 783 /* Returns true if any port of this tree offloads the given bridge */ 784 static inline bool 785 dsa_tree_offloads_bridge_dev(struct dsa_switch_tree *dst, 786 const struct net_device *bridge_dev) 787 { 788 struct dsa_port *dp; 789 790 list_for_each_entry(dp, &dst->ports, list) 791 if (dsa_port_offloads_bridge_dev(dp, bridge_dev)) 792 return true; 793 794 return false; 795 } 796 797 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 798 bool is_static, void *data); 799 struct dsa_switch_ops { 800 /* 801 * Tagging protocol helpers called for the CPU ports and DSA links. 802 * @get_tag_protocol retrieves the initial tagging protocol and is 803 * mandatory. Switches which can operate using multiple tagging 804 * protocols should implement @change_tag_protocol and report in 805 * @get_tag_protocol the tagger in current use. 806 */ 807 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 808 int port, 809 enum dsa_tag_protocol mprot); 810 int (*change_tag_protocol)(struct dsa_switch *ds, 811 enum dsa_tag_protocol proto); 812 /* 813 * Method for switch drivers to connect to the tagging protocol driver 814 * in current use. The switch driver can provide handlers for certain 815 * types of packets for switch management. 816 */ 817 int (*connect_tag_protocol)(struct dsa_switch *ds, 818 enum dsa_tag_protocol proto); 819 820 /* Optional switch-wide initialization and destruction methods */ 821 int (*setup)(struct dsa_switch *ds); 822 void (*teardown)(struct dsa_switch *ds); 823 824 /* Per-port initialization and destruction methods. Mandatory if the 825 * driver registers devlink port regions, optional otherwise. 826 */ 827 int (*port_setup)(struct dsa_switch *ds, int port); 828 void (*port_teardown)(struct dsa_switch *ds, int port); 829 830 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 831 832 /* 833 * Access to the switch's PHY registers. 834 */ 835 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 836 int (*phy_write)(struct dsa_switch *ds, int port, 837 int regnum, u16 val); 838 839 /* 840 * Link state adjustment (called from libphy) 841 */ 842 void (*adjust_link)(struct dsa_switch *ds, int port, 843 struct phy_device *phydev); 844 void (*fixed_link_update)(struct dsa_switch *ds, int port, 845 struct fixed_phy_status *st); 846 847 /* 848 * PHYLINK integration 849 */ 850 void (*phylink_get_caps)(struct dsa_switch *ds, int port, 851 struct phylink_config *config); 852 void (*phylink_validate)(struct dsa_switch *ds, int port, 853 unsigned long *supported, 854 struct phylink_link_state *state); 855 struct phylink_pcs *(*phylink_mac_select_pcs)(struct dsa_switch *ds, 856 int port, 857 phy_interface_t iface); 858 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 859 struct phylink_link_state *state); 860 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 861 unsigned int mode, 862 const struct phylink_link_state *state); 863 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 864 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 865 unsigned int mode, 866 phy_interface_t interface); 867 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 868 unsigned int mode, 869 phy_interface_t interface, 870 struct phy_device *phydev, 871 int speed, int duplex, 872 bool tx_pause, bool rx_pause); 873 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 874 struct phylink_link_state *state); 875 /* 876 * Port statistics counters. 877 */ 878 void (*get_strings)(struct dsa_switch *ds, int port, 879 u32 stringset, uint8_t *data); 880 void (*get_ethtool_stats)(struct dsa_switch *ds, 881 int port, uint64_t *data); 882 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 883 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 884 int port, uint64_t *data); 885 void (*get_eth_phy_stats)(struct dsa_switch *ds, int port, 886 struct ethtool_eth_phy_stats *phy_stats); 887 void (*get_eth_mac_stats)(struct dsa_switch *ds, int port, 888 struct ethtool_eth_mac_stats *mac_stats); 889 void (*get_eth_ctrl_stats)(struct dsa_switch *ds, int port, 890 struct ethtool_eth_ctrl_stats *ctrl_stats); 891 void (*get_stats64)(struct dsa_switch *ds, int port, 892 struct rtnl_link_stats64 *s); 893 void (*self_test)(struct dsa_switch *ds, int port, 894 struct ethtool_test *etest, u64 *data); 895 896 /* 897 * ethtool Wake-on-LAN 898 */ 899 void (*get_wol)(struct dsa_switch *ds, int port, 900 struct ethtool_wolinfo *w); 901 int (*set_wol)(struct dsa_switch *ds, int port, 902 struct ethtool_wolinfo *w); 903 904 /* 905 * ethtool timestamp info 906 */ 907 int (*get_ts_info)(struct dsa_switch *ds, int port, 908 struct ethtool_ts_info *ts); 909 910 /* 911 * DCB ops 912 */ 913 int (*port_get_default_prio)(struct dsa_switch *ds, int port); 914 int (*port_set_default_prio)(struct dsa_switch *ds, int port, 915 u8 prio); 916 int (*port_get_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp); 917 int (*port_add_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp, 918 u8 prio); 919 int (*port_del_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp, 920 u8 prio); 921 922 /* 923 * Suspend and resume 924 */ 925 int (*suspend)(struct dsa_switch *ds); 926 int (*resume)(struct dsa_switch *ds); 927 928 /* 929 * Port enable/disable 930 */ 931 int (*port_enable)(struct dsa_switch *ds, int port, 932 struct phy_device *phy); 933 void (*port_disable)(struct dsa_switch *ds, int port); 934 935 /* 936 * Port's MAC EEE settings 937 */ 938 int (*set_mac_eee)(struct dsa_switch *ds, int port, 939 struct ethtool_eee *e); 940 int (*get_mac_eee)(struct dsa_switch *ds, int port, 941 struct ethtool_eee *e); 942 943 /* EEPROM access */ 944 int (*get_eeprom_len)(struct dsa_switch *ds); 945 int (*get_eeprom)(struct dsa_switch *ds, 946 struct ethtool_eeprom *eeprom, u8 *data); 947 int (*set_eeprom)(struct dsa_switch *ds, 948 struct ethtool_eeprom *eeprom, u8 *data); 949 950 /* 951 * Register access. 952 */ 953 int (*get_regs_len)(struct dsa_switch *ds, int port); 954 void (*get_regs)(struct dsa_switch *ds, int port, 955 struct ethtool_regs *regs, void *p); 956 957 /* 958 * Upper device tracking. 959 */ 960 int (*port_prechangeupper)(struct dsa_switch *ds, int port, 961 struct netdev_notifier_changeupper_info *info); 962 963 /* 964 * Bridge integration 965 */ 966 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 967 int (*port_bridge_join)(struct dsa_switch *ds, int port, 968 struct dsa_bridge bridge, 969 bool *tx_fwd_offload, 970 struct netlink_ext_ack *extack); 971 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 972 struct dsa_bridge bridge); 973 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 974 u8 state); 975 int (*port_mst_state_set)(struct dsa_switch *ds, int port, 976 const struct switchdev_mst_state *state); 977 void (*port_fast_age)(struct dsa_switch *ds, int port); 978 int (*port_vlan_fast_age)(struct dsa_switch *ds, int port, u16 vid); 979 int (*port_pre_bridge_flags)(struct dsa_switch *ds, int port, 980 struct switchdev_brport_flags flags, 981 struct netlink_ext_ack *extack); 982 int (*port_bridge_flags)(struct dsa_switch *ds, int port, 983 struct switchdev_brport_flags flags, 984 struct netlink_ext_ack *extack); 985 void (*port_set_host_flood)(struct dsa_switch *ds, int port, 986 bool uc, bool mc); 987 988 /* 989 * VLAN support 990 */ 991 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 992 bool vlan_filtering, 993 struct netlink_ext_ack *extack); 994 int (*port_vlan_add)(struct dsa_switch *ds, int port, 995 const struct switchdev_obj_port_vlan *vlan, 996 struct netlink_ext_ack *extack); 997 int (*port_vlan_del)(struct dsa_switch *ds, int port, 998 const struct switchdev_obj_port_vlan *vlan); 999 int (*vlan_msti_set)(struct dsa_switch *ds, struct dsa_bridge bridge, 1000 const struct switchdev_vlan_msti *msti); 1001 1002 /* 1003 * Forwarding database 1004 */ 1005 int (*port_fdb_add)(struct dsa_switch *ds, int port, 1006 const unsigned char *addr, u16 vid, 1007 struct dsa_db db); 1008 int (*port_fdb_del)(struct dsa_switch *ds, int port, 1009 const unsigned char *addr, u16 vid, 1010 struct dsa_db db); 1011 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 1012 dsa_fdb_dump_cb_t *cb, void *data); 1013 int (*lag_fdb_add)(struct dsa_switch *ds, struct dsa_lag lag, 1014 const unsigned char *addr, u16 vid, 1015 struct dsa_db db); 1016 int (*lag_fdb_del)(struct dsa_switch *ds, struct dsa_lag lag, 1017 const unsigned char *addr, u16 vid, 1018 struct dsa_db db); 1019 1020 /* 1021 * Multicast database 1022 */ 1023 int (*port_mdb_add)(struct dsa_switch *ds, int port, 1024 const struct switchdev_obj_port_mdb *mdb, 1025 struct dsa_db db); 1026 int (*port_mdb_del)(struct dsa_switch *ds, int port, 1027 const struct switchdev_obj_port_mdb *mdb, 1028 struct dsa_db db); 1029 /* 1030 * RXNFC 1031 */ 1032 int (*get_rxnfc)(struct dsa_switch *ds, int port, 1033 struct ethtool_rxnfc *nfc, u32 *rule_locs); 1034 int (*set_rxnfc)(struct dsa_switch *ds, int port, 1035 struct ethtool_rxnfc *nfc); 1036 1037 /* 1038 * TC integration 1039 */ 1040 int (*cls_flower_add)(struct dsa_switch *ds, int port, 1041 struct flow_cls_offload *cls, bool ingress); 1042 int (*cls_flower_del)(struct dsa_switch *ds, int port, 1043 struct flow_cls_offload *cls, bool ingress); 1044 int (*cls_flower_stats)(struct dsa_switch *ds, int port, 1045 struct flow_cls_offload *cls, bool ingress); 1046 int (*port_mirror_add)(struct dsa_switch *ds, int port, 1047 struct dsa_mall_mirror_tc_entry *mirror, 1048 bool ingress, struct netlink_ext_ack *extack); 1049 void (*port_mirror_del)(struct dsa_switch *ds, int port, 1050 struct dsa_mall_mirror_tc_entry *mirror); 1051 int (*port_policer_add)(struct dsa_switch *ds, int port, 1052 struct dsa_mall_policer_tc_entry *policer); 1053 void (*port_policer_del)(struct dsa_switch *ds, int port); 1054 int (*port_setup_tc)(struct dsa_switch *ds, int port, 1055 enum tc_setup_type type, void *type_data); 1056 1057 /* 1058 * Cross-chip operations 1059 */ 1060 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index, 1061 int sw_index, int port, 1062 struct dsa_bridge bridge, 1063 struct netlink_ext_ack *extack); 1064 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index, 1065 int sw_index, int port, 1066 struct dsa_bridge bridge); 1067 int (*crosschip_lag_change)(struct dsa_switch *ds, int sw_index, 1068 int port); 1069 int (*crosschip_lag_join)(struct dsa_switch *ds, int sw_index, 1070 int port, struct dsa_lag lag, 1071 struct netdev_lag_upper_info *info); 1072 int (*crosschip_lag_leave)(struct dsa_switch *ds, int sw_index, 1073 int port, struct dsa_lag lag); 1074 1075 /* 1076 * PTP functionality 1077 */ 1078 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 1079 struct ifreq *ifr); 1080 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 1081 struct ifreq *ifr); 1082 void (*port_txtstamp)(struct dsa_switch *ds, int port, 1083 struct sk_buff *skb); 1084 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 1085 struct sk_buff *skb, unsigned int type); 1086 1087 /* Devlink parameters, etc */ 1088 int (*devlink_param_get)(struct dsa_switch *ds, u32 id, 1089 struct devlink_param_gset_ctx *ctx); 1090 int (*devlink_param_set)(struct dsa_switch *ds, u32 id, 1091 struct devlink_param_gset_ctx *ctx); 1092 int (*devlink_info_get)(struct dsa_switch *ds, 1093 struct devlink_info_req *req, 1094 struct netlink_ext_ack *extack); 1095 int (*devlink_sb_pool_get)(struct dsa_switch *ds, 1096 unsigned int sb_index, u16 pool_index, 1097 struct devlink_sb_pool_info *pool_info); 1098 int (*devlink_sb_pool_set)(struct dsa_switch *ds, unsigned int sb_index, 1099 u16 pool_index, u32 size, 1100 enum devlink_sb_threshold_type threshold_type, 1101 struct netlink_ext_ack *extack); 1102 int (*devlink_sb_port_pool_get)(struct dsa_switch *ds, int port, 1103 unsigned int sb_index, u16 pool_index, 1104 u32 *p_threshold); 1105 int (*devlink_sb_port_pool_set)(struct dsa_switch *ds, int port, 1106 unsigned int sb_index, u16 pool_index, 1107 u32 threshold, 1108 struct netlink_ext_ack *extack); 1109 int (*devlink_sb_tc_pool_bind_get)(struct dsa_switch *ds, int port, 1110 unsigned int sb_index, u16 tc_index, 1111 enum devlink_sb_pool_type pool_type, 1112 u16 *p_pool_index, u32 *p_threshold); 1113 int (*devlink_sb_tc_pool_bind_set)(struct dsa_switch *ds, int port, 1114 unsigned int sb_index, u16 tc_index, 1115 enum devlink_sb_pool_type pool_type, 1116 u16 pool_index, u32 threshold, 1117 struct netlink_ext_ack *extack); 1118 int (*devlink_sb_occ_snapshot)(struct dsa_switch *ds, 1119 unsigned int sb_index); 1120 int (*devlink_sb_occ_max_clear)(struct dsa_switch *ds, 1121 unsigned int sb_index); 1122 int (*devlink_sb_occ_port_pool_get)(struct dsa_switch *ds, int port, 1123 unsigned int sb_index, u16 pool_index, 1124 u32 *p_cur, u32 *p_max); 1125 int (*devlink_sb_occ_tc_port_bind_get)(struct dsa_switch *ds, int port, 1126 unsigned int sb_index, u16 tc_index, 1127 enum devlink_sb_pool_type pool_type, 1128 u32 *p_cur, u32 *p_max); 1129 1130 /* 1131 * MTU change functionality. Switches can also adjust their MRU through 1132 * this method. By MTU, one understands the SDU (L2 payload) length. 1133 * If the switch needs to account for the DSA tag on the CPU port, this 1134 * method needs to do so privately. 1135 */ 1136 int (*port_change_mtu)(struct dsa_switch *ds, int port, 1137 int new_mtu); 1138 int (*port_max_mtu)(struct dsa_switch *ds, int port); 1139 1140 /* 1141 * LAG integration 1142 */ 1143 int (*port_lag_change)(struct dsa_switch *ds, int port); 1144 int (*port_lag_join)(struct dsa_switch *ds, int port, 1145 struct dsa_lag lag, 1146 struct netdev_lag_upper_info *info); 1147 int (*port_lag_leave)(struct dsa_switch *ds, int port, 1148 struct dsa_lag lag); 1149 1150 /* 1151 * HSR integration 1152 */ 1153 int (*port_hsr_join)(struct dsa_switch *ds, int port, 1154 struct net_device *hsr); 1155 int (*port_hsr_leave)(struct dsa_switch *ds, int port, 1156 struct net_device *hsr); 1157 1158 /* 1159 * MRP integration 1160 */ 1161 int (*port_mrp_add)(struct dsa_switch *ds, int port, 1162 const struct switchdev_obj_mrp *mrp); 1163 int (*port_mrp_del)(struct dsa_switch *ds, int port, 1164 const struct switchdev_obj_mrp *mrp); 1165 int (*port_mrp_add_ring_role)(struct dsa_switch *ds, int port, 1166 const struct switchdev_obj_ring_role_mrp *mrp); 1167 int (*port_mrp_del_ring_role)(struct dsa_switch *ds, int port, 1168 const struct switchdev_obj_ring_role_mrp *mrp); 1169 1170 /* 1171 * tag_8021q operations 1172 */ 1173 int (*tag_8021q_vlan_add)(struct dsa_switch *ds, int port, u16 vid, 1174 u16 flags); 1175 int (*tag_8021q_vlan_del)(struct dsa_switch *ds, int port, u16 vid); 1176 1177 /* 1178 * DSA master tracking operations 1179 */ 1180 void (*master_state_change)(struct dsa_switch *ds, 1181 const struct net_device *master, 1182 bool operational); 1183 }; 1184 1185 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \ 1186 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \ 1187 dsa_devlink_param_get, dsa_devlink_param_set, NULL) 1188 1189 int dsa_devlink_param_get(struct devlink *dl, u32 id, 1190 struct devlink_param_gset_ctx *ctx); 1191 int dsa_devlink_param_set(struct devlink *dl, u32 id, 1192 struct devlink_param_gset_ctx *ctx); 1193 int dsa_devlink_params_register(struct dsa_switch *ds, 1194 const struct devlink_param *params, 1195 size_t params_count); 1196 void dsa_devlink_params_unregister(struct dsa_switch *ds, 1197 const struct devlink_param *params, 1198 size_t params_count); 1199 int dsa_devlink_resource_register(struct dsa_switch *ds, 1200 const char *resource_name, 1201 u64 resource_size, 1202 u64 resource_id, 1203 u64 parent_resource_id, 1204 const struct devlink_resource_size_params *size_params); 1205 1206 void dsa_devlink_resources_unregister(struct dsa_switch *ds); 1207 1208 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds, 1209 u64 resource_id, 1210 devlink_resource_occ_get_t *occ_get, 1211 void *occ_get_priv); 1212 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds, 1213 u64 resource_id); 1214 struct devlink_region * 1215 dsa_devlink_region_create(struct dsa_switch *ds, 1216 const struct devlink_region_ops *ops, 1217 u32 region_max_snapshots, u64 region_size); 1218 struct devlink_region * 1219 dsa_devlink_port_region_create(struct dsa_switch *ds, 1220 int port, 1221 const struct devlink_port_region_ops *ops, 1222 u32 region_max_snapshots, u64 region_size); 1223 void dsa_devlink_region_destroy(struct devlink_region *region); 1224 1225 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev); 1226 1227 struct dsa_devlink_priv { 1228 struct dsa_switch *ds; 1229 }; 1230 1231 static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl) 1232 { 1233 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 1234 1235 return dl_priv->ds; 1236 } 1237 1238 static inline 1239 struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port) 1240 { 1241 struct devlink *dl = port->devlink; 1242 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 1243 1244 return dl_priv->ds; 1245 } 1246 1247 static inline int dsa_devlink_port_to_port(struct devlink_port *port) 1248 { 1249 return port->index; 1250 } 1251 1252 struct dsa_switch_driver { 1253 struct list_head list; 1254 const struct dsa_switch_ops *ops; 1255 }; 1256 1257 struct net_device *dsa_dev_to_net_device(struct device *dev); 1258 1259 bool dsa_fdb_present_in_other_db(struct dsa_switch *ds, int port, 1260 const unsigned char *addr, u16 vid, 1261 struct dsa_db db); 1262 bool dsa_mdb_present_in_other_db(struct dsa_switch *ds, int port, 1263 const struct switchdev_obj_port_mdb *mdb, 1264 struct dsa_db db); 1265 1266 /* Keep inline for faster access in hot path */ 1267 static inline bool netdev_uses_dsa(const struct net_device *dev) 1268 { 1269 #if IS_ENABLED(CONFIG_NET_DSA) 1270 return dev->dsa_ptr && dev->dsa_ptr->rcv; 1271 #endif 1272 return false; 1273 } 1274 1275 /* All DSA tags that push the EtherType to the right (basically all except tail 1276 * tags, which don't break dissection) can be treated the same from the 1277 * perspective of the flow dissector. 1278 * 1279 * We need to return: 1280 * - offset: the (B - A) difference between: 1281 * A. the position of the real EtherType and 1282 * B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes 1283 * after the normal EtherType was supposed to be) 1284 * The offset in bytes is exactly equal to the tagger overhead (and half of 1285 * that, in __be16 shorts). 1286 * 1287 * - proto: the value of the real EtherType. 1288 */ 1289 static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb, 1290 __be16 *proto, int *offset) 1291 { 1292 #if IS_ENABLED(CONFIG_NET_DSA) 1293 const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops; 1294 int tag_len = ops->needed_headroom; 1295 1296 *offset = tag_len; 1297 *proto = ((__be16 *)skb->data)[(tag_len / 2) - 1]; 1298 #endif 1299 } 1300 1301 #if IS_ENABLED(CONFIG_NET_DSA) 1302 static inline int __dsa_netdevice_ops_check(struct net_device *dev) 1303 { 1304 int err = -EOPNOTSUPP; 1305 1306 if (!dev->dsa_ptr) 1307 return err; 1308 1309 if (!dev->dsa_ptr->netdev_ops) 1310 return err; 1311 1312 return 0; 1313 } 1314 1315 static inline int dsa_ndo_eth_ioctl(struct net_device *dev, struct ifreq *ifr, 1316 int cmd) 1317 { 1318 const struct dsa_netdevice_ops *ops; 1319 int err; 1320 1321 err = __dsa_netdevice_ops_check(dev); 1322 if (err) 1323 return err; 1324 1325 ops = dev->dsa_ptr->netdev_ops; 1326 1327 return ops->ndo_eth_ioctl(dev, ifr, cmd); 1328 } 1329 #else 1330 static inline int dsa_ndo_eth_ioctl(struct net_device *dev, struct ifreq *ifr, 1331 int cmd) 1332 { 1333 return -EOPNOTSUPP; 1334 } 1335 #endif 1336 1337 void dsa_unregister_switch(struct dsa_switch *ds); 1338 int dsa_register_switch(struct dsa_switch *ds); 1339 void dsa_switch_shutdown(struct dsa_switch *ds); 1340 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index); 1341 void dsa_flush_workqueue(void); 1342 #ifdef CONFIG_PM_SLEEP 1343 int dsa_switch_suspend(struct dsa_switch *ds); 1344 int dsa_switch_resume(struct dsa_switch *ds); 1345 #else 1346 static inline int dsa_switch_suspend(struct dsa_switch *ds) 1347 { 1348 return 0; 1349 } 1350 static inline int dsa_switch_resume(struct dsa_switch *ds) 1351 { 1352 return 0; 1353 } 1354 #endif /* CONFIG_PM_SLEEP */ 1355 1356 #if IS_ENABLED(CONFIG_NET_DSA) 1357 bool dsa_slave_dev_check(const struct net_device *dev); 1358 #else 1359 static inline bool dsa_slave_dev_check(const struct net_device *dev) 1360 { 1361 return false; 1362 } 1363 #endif 1364 1365 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 1366 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 1367 1368 struct dsa_tag_driver { 1369 const struct dsa_device_ops *ops; 1370 struct list_head list; 1371 struct module *owner; 1372 }; 1373 1374 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 1375 unsigned int count, 1376 struct module *owner); 1377 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 1378 unsigned int count); 1379 1380 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 1381 static int __init dsa_tag_driver_module_init(void) \ 1382 { \ 1383 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 1384 THIS_MODULE); \ 1385 return 0; \ 1386 } \ 1387 module_init(dsa_tag_driver_module_init); \ 1388 \ 1389 static void __exit dsa_tag_driver_module_exit(void) \ 1390 { \ 1391 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 1392 } \ 1393 module_exit(dsa_tag_driver_module_exit) 1394 1395 /** 1396 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 1397 * drivers 1398 * @__ops_array: Array of tag driver structures 1399 * 1400 * Helper macro for DSA tag drivers which do not do anything special 1401 * in module init/exit. Each module may only use this macro once, and 1402 * calling it replaces module_init() and module_exit(). 1403 */ 1404 #define module_dsa_tag_drivers(__ops_array) \ 1405 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 1406 1407 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 1408 1409 /* Create a static structure we can build a linked list of dsa_tag 1410 * drivers 1411 */ 1412 #define DSA_TAG_DRIVER(__ops) \ 1413 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 1414 .ops = &__ops, \ 1415 } 1416 1417 /** 1418 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 1419 * driver 1420 * @__ops: Single tag driver structures 1421 * 1422 * Helper macro for DSA tag drivers which do not do anything special 1423 * in module init/exit. Each module may only use this macro once, and 1424 * calling it replaces module_init() and module_exit(). 1425 */ 1426 #define module_dsa_tag_driver(__ops) \ 1427 DSA_TAG_DRIVER(__ops); \ 1428 \ 1429 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 1430 &DSA_TAG_DRIVER_NAME(__ops) \ 1431 }; \ 1432 module_dsa_tag_drivers(dsa_tag_driver_array) 1433 #endif 1434 1435