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 #define DSA_TAG_PROTO_RZN1_A5PSW_VALUE 26 57 #define DSA_TAG_PROTO_LAN937X_VALUE 27 58 59 enum dsa_tag_protocol { 60 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, 61 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, 62 DSA_TAG_PROTO_BRCM_LEGACY = DSA_TAG_PROTO_BRCM_LEGACY_VALUE, 63 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, 64 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, 65 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, 66 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE, 67 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE, 68 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, 69 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, 70 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, 71 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, 72 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, 73 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, 74 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE, 75 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE, 76 DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE, 77 DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_VALUE, 78 DSA_TAG_PROTO_RTL4_A = DSA_TAG_PROTO_RTL4_A_VALUE, 79 DSA_TAG_PROTO_HELLCREEK = DSA_TAG_PROTO_HELLCREEK_VALUE, 80 DSA_TAG_PROTO_XRS700X = DSA_TAG_PROTO_XRS700X_VALUE, 81 DSA_TAG_PROTO_OCELOT_8021Q = DSA_TAG_PROTO_OCELOT_8021Q_VALUE, 82 DSA_TAG_PROTO_SEVILLE = DSA_TAG_PROTO_SEVILLE_VALUE, 83 DSA_TAG_PROTO_SJA1110 = DSA_TAG_PROTO_SJA1110_VALUE, 84 DSA_TAG_PROTO_RTL8_4 = DSA_TAG_PROTO_RTL8_4_VALUE, 85 DSA_TAG_PROTO_RTL8_4T = DSA_TAG_PROTO_RTL8_4T_VALUE, 86 DSA_TAG_PROTO_RZN1_A5PSW = DSA_TAG_PROTO_RZN1_A5PSW_VALUE, 87 DSA_TAG_PROTO_LAN937X = DSA_TAG_PROTO_LAN937X_VALUE, 88 }; 89 90 struct dsa_switch; 91 92 struct dsa_device_ops { 93 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev); 94 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev); 95 void (*flow_dissect)(const struct sk_buff *skb, __be16 *proto, 96 int *offset); 97 int (*connect)(struct dsa_switch *ds); 98 void (*disconnect)(struct dsa_switch *ds); 99 unsigned int needed_headroom; 100 unsigned int needed_tailroom; 101 const char *name; 102 enum dsa_tag_protocol proto; 103 /* Some tagging protocols either mangle or shift the destination MAC 104 * address, in which case the DSA master would drop packets on ingress 105 * if what it understands out of the destination MAC address is not in 106 * its RX filter. 107 */ 108 bool promisc_on_master; 109 }; 110 111 /* This structure defines the control interfaces that are overlayed by the 112 * DSA layer on top of the DSA CPU/management net_device instance. This is 113 * used by the core net_device layer while calling various net_device_ops 114 * function pointers. 115 */ 116 struct dsa_netdevice_ops { 117 int (*ndo_eth_ioctl)(struct net_device *dev, struct ifreq *ifr, 118 int cmd); 119 }; 120 121 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-" 122 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \ 123 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE)) 124 125 struct dsa_lag { 126 struct net_device *dev; 127 unsigned int id; 128 struct mutex fdb_lock; 129 struct list_head fdbs; 130 refcount_t refcount; 131 }; 132 133 struct dsa_switch_tree { 134 struct list_head list; 135 136 /* List of switch ports */ 137 struct list_head ports; 138 139 /* Notifier chain for switch-wide events */ 140 struct raw_notifier_head nh; 141 142 /* Tree identifier */ 143 unsigned int index; 144 145 /* Number of switches attached to this tree */ 146 struct kref refcount; 147 148 /* Maps offloaded LAG netdevs to a zero-based linear ID for 149 * drivers that need it. 150 */ 151 struct dsa_lag **lags; 152 153 /* Tagging protocol operations */ 154 const struct dsa_device_ops *tag_ops; 155 156 /* Default tagging protocol preferred by the switches in this 157 * tree. 158 */ 159 enum dsa_tag_protocol default_proto; 160 161 /* Has this tree been applied to the hardware? */ 162 bool setup; 163 164 /* 165 * Configuration data for the platform device that owns 166 * this dsa switch tree instance. 167 */ 168 struct dsa_platform_data *pd; 169 170 /* List of DSA links composing the routing table */ 171 struct list_head rtable; 172 173 /* Length of "lags" array */ 174 unsigned int lags_len; 175 176 /* Track the largest switch index within a tree */ 177 unsigned int last_switch; 178 }; 179 180 /* LAG IDs are one-based, the dst->lags array is zero-based */ 181 #define dsa_lags_foreach_id(_id, _dst) \ 182 for ((_id) = 1; (_id) <= (_dst)->lags_len; (_id)++) \ 183 if ((_dst)->lags[(_id) - 1]) 184 185 #define dsa_lag_foreach_port(_dp, _dst, _lag) \ 186 list_for_each_entry((_dp), &(_dst)->ports, list) \ 187 if (dsa_port_offloads_lag((_dp), (_lag))) 188 189 #define dsa_hsr_foreach_port(_dp, _ds, _hsr) \ 190 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \ 191 if ((_dp)->ds == (_ds) && (_dp)->hsr_dev == (_hsr)) 192 193 static inline struct dsa_lag *dsa_lag_by_id(struct dsa_switch_tree *dst, 194 unsigned int id) 195 { 196 /* DSA LAG IDs are one-based, dst->lags is zero-based */ 197 return dst->lags[id - 1]; 198 } 199 200 static inline int dsa_lag_id(struct dsa_switch_tree *dst, 201 struct net_device *lag_dev) 202 { 203 unsigned int id; 204 205 dsa_lags_foreach_id(id, dst) { 206 struct dsa_lag *lag = dsa_lag_by_id(dst, id); 207 208 if (lag->dev == lag_dev) 209 return lag->id; 210 } 211 212 return -ENODEV; 213 } 214 215 /* TC matchall action types */ 216 enum dsa_port_mall_action_type { 217 DSA_PORT_MALL_MIRROR, 218 DSA_PORT_MALL_POLICER, 219 }; 220 221 /* TC mirroring entry */ 222 struct dsa_mall_mirror_tc_entry { 223 u8 to_local_port; 224 bool ingress; 225 }; 226 227 /* TC port policer entry */ 228 struct dsa_mall_policer_tc_entry { 229 u32 burst; 230 u64 rate_bytes_per_sec; 231 }; 232 233 /* TC matchall entry */ 234 struct dsa_mall_tc_entry { 235 struct list_head list; 236 unsigned long cookie; 237 enum dsa_port_mall_action_type type; 238 union { 239 struct dsa_mall_mirror_tc_entry mirror; 240 struct dsa_mall_policer_tc_entry policer; 241 }; 242 }; 243 244 struct dsa_bridge { 245 struct net_device *dev; 246 unsigned int num; 247 bool tx_fwd_offload; 248 refcount_t refcount; 249 }; 250 251 struct dsa_port { 252 /* A CPU port is physically connected to a master device. 253 * A user port exposed to userspace has a slave device. 254 */ 255 union { 256 struct net_device *master; 257 struct net_device *slave; 258 }; 259 260 /* Copy of the tagging protocol operations, for quicker access 261 * in the data path. Valid only for the CPU ports. 262 */ 263 const struct dsa_device_ops *tag_ops; 264 265 /* Copies for faster access in master receive hot path */ 266 struct dsa_switch_tree *dst; 267 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev); 268 269 struct dsa_switch *ds; 270 271 unsigned int index; 272 273 enum { 274 DSA_PORT_TYPE_UNUSED = 0, 275 DSA_PORT_TYPE_CPU, 276 DSA_PORT_TYPE_DSA, 277 DSA_PORT_TYPE_USER, 278 } type; 279 280 const char *name; 281 struct dsa_port *cpu_dp; 282 u8 mac[ETH_ALEN]; 283 284 u8 stp_state; 285 286 /* Warning: the following bit fields are not atomic, and updating them 287 * can only be done from code paths where concurrency is not possible 288 * (probe time or under rtnl_lock). 289 */ 290 u8 vlan_filtering:1; 291 292 /* Managed by DSA on user ports and by drivers on CPU and DSA ports */ 293 u8 learning:1; 294 295 u8 lag_tx_enabled:1; 296 297 u8 devlink_port_setup:1; 298 299 /* Master state bits, valid only on CPU ports */ 300 u8 master_admin_up:1; 301 u8 master_oper_up:1; 302 303 u8 setup:1; 304 305 struct device_node *dn; 306 unsigned int ageing_time; 307 308 struct dsa_bridge *bridge; 309 struct devlink_port devlink_port; 310 struct phylink *pl; 311 struct phylink_config pl_config; 312 struct dsa_lag *lag; 313 struct net_device *hsr_dev; 314 315 struct list_head list; 316 317 /* 318 * Original copy of the master netdev ethtool_ops 319 */ 320 const struct ethtool_ops *orig_ethtool_ops; 321 322 /* 323 * Original copy of the master netdev net_device_ops 324 */ 325 const struct dsa_netdevice_ops *netdev_ops; 326 327 /* List of MAC addresses that must be forwarded on this port. 328 * These are only valid on CPU ports and DSA links. 329 */ 330 struct mutex addr_lists_lock; 331 struct list_head fdbs; 332 struct list_head mdbs; 333 334 /* List of VLANs that CPU and DSA ports are members of. */ 335 struct mutex vlans_lock; 336 struct list_head vlans; 337 }; 338 339 /* TODO: ideally DSA ports would have a single dp->link_dp member, 340 * and no dst->rtable nor this struct dsa_link would be needed, 341 * but this would require some more complex tree walking, 342 * so keep it stupid at the moment and list them all. 343 */ 344 struct dsa_link { 345 struct dsa_port *dp; 346 struct dsa_port *link_dp; 347 struct list_head list; 348 }; 349 350 enum dsa_db_type { 351 DSA_DB_PORT, 352 DSA_DB_LAG, 353 DSA_DB_BRIDGE, 354 }; 355 356 struct dsa_db { 357 enum dsa_db_type type; 358 359 union { 360 const struct dsa_port *dp; 361 struct dsa_lag lag; 362 struct dsa_bridge bridge; 363 }; 364 }; 365 366 struct dsa_mac_addr { 367 unsigned char addr[ETH_ALEN]; 368 u16 vid; 369 refcount_t refcount; 370 struct list_head list; 371 struct dsa_db db; 372 }; 373 374 struct dsa_vlan { 375 u16 vid; 376 refcount_t refcount; 377 struct list_head list; 378 }; 379 380 struct dsa_switch { 381 struct device *dev; 382 383 /* 384 * Parent switch tree, and switch index. 385 */ 386 struct dsa_switch_tree *dst; 387 unsigned int index; 388 389 /* Warning: the following bit fields are not atomic, and updating them 390 * can only be done from code paths where concurrency is not possible 391 * (probe time or under rtnl_lock). 392 */ 393 u32 setup:1; 394 395 /* Disallow bridge core from requesting different VLAN awareness 396 * settings on ports if not hardware-supported 397 */ 398 u32 vlan_filtering_is_global:1; 399 400 /* Keep VLAN filtering enabled on ports not offloading any upper */ 401 u32 needs_standalone_vlan_filtering:1; 402 403 /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges 404 * that have vlan_filtering=0. All drivers should ideally set this (and 405 * then the option would get removed), but it is unknown whether this 406 * would break things or not. 407 */ 408 u32 configure_vlan_while_not_filtering:1; 409 410 /* If the switch driver always programs the CPU port as egress tagged 411 * despite the VLAN configuration indicating otherwise, then setting 412 * @untag_bridge_pvid will force the DSA receive path to pop the 413 * bridge's default_pvid VLAN tagged frames to offer a consistent 414 * behavior between a vlan_filtering=0 and vlan_filtering=1 bridge 415 * device. 416 */ 417 u32 untag_bridge_pvid:1; 418 419 /* Let DSA manage the FDB entries towards the 420 * CPU, based on the software bridge database. 421 */ 422 u32 assisted_learning_on_cpu_port:1; 423 424 /* In case vlan_filtering_is_global is set, the VLAN awareness state 425 * should be retrieved from here and not from the per-port settings. 426 */ 427 u32 vlan_filtering:1; 428 429 /* For switches that only have the MRU configurable. To ensure the 430 * configured MTU is not exceeded, normalization of MRU on all bridged 431 * interfaces is needed. 432 */ 433 u32 mtu_enforcement_ingress:1; 434 435 /* Drivers that isolate the FDBs of multiple bridges must set this 436 * to true to receive the bridge as an argument in .port_fdb_{add,del} 437 * and .port_mdb_{add,del}. Otherwise, the bridge.num will always be 438 * passed as zero. 439 */ 440 u32 fdb_isolation:1; 441 442 /* Listener for switch fabric events */ 443 struct notifier_block nb; 444 445 /* 446 * Give the switch driver somewhere to hang its private data 447 * structure. 448 */ 449 void *priv; 450 451 void *tagger_data; 452 453 /* 454 * Configuration data for this switch. 455 */ 456 struct dsa_chip_data *cd; 457 458 /* 459 * The switch operations. 460 */ 461 const struct dsa_switch_ops *ops; 462 463 /* 464 * Slave mii_bus and devices for the individual ports. 465 */ 466 u32 phys_mii_mask; 467 struct mii_bus *slave_mii_bus; 468 469 /* Ageing Time limits in msecs */ 470 unsigned int ageing_time_min; 471 unsigned int ageing_time_max; 472 473 /* Storage for drivers using tag_8021q */ 474 struct dsa_8021q_context *tag_8021q_ctx; 475 476 /* devlink used to represent this switch device */ 477 struct devlink *devlink; 478 479 /* Number of switch port queues */ 480 unsigned int num_tx_queues; 481 482 /* Drivers that benefit from having an ID associated with each 483 * offloaded LAG should set this to the maximum number of 484 * supported IDs. DSA will then maintain a mapping of _at 485 * least_ these many IDs, accessible to drivers via 486 * dsa_lag_id(). 487 */ 488 unsigned int num_lag_ids; 489 490 /* Drivers that support bridge forwarding offload or FDB isolation 491 * should set this to the maximum number of bridges spanning the same 492 * switch tree (or all trees, in the case of cross-tree bridging 493 * support) that can be offloaded. 494 */ 495 unsigned int max_num_bridges; 496 497 unsigned int num_ports; 498 }; 499 500 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 501 { 502 struct dsa_switch_tree *dst = ds->dst; 503 struct dsa_port *dp; 504 505 list_for_each_entry(dp, &dst->ports, list) 506 if (dp->ds == ds && dp->index == p) 507 return dp; 508 509 return NULL; 510 } 511 512 static inline bool dsa_port_is_dsa(struct dsa_port *port) 513 { 514 return port->type == DSA_PORT_TYPE_DSA; 515 } 516 517 static inline bool dsa_port_is_cpu(struct dsa_port *port) 518 { 519 return port->type == DSA_PORT_TYPE_CPU; 520 } 521 522 static inline bool dsa_port_is_user(struct dsa_port *dp) 523 { 524 return dp->type == DSA_PORT_TYPE_USER; 525 } 526 527 static inline bool dsa_port_is_unused(struct dsa_port *dp) 528 { 529 return dp->type == DSA_PORT_TYPE_UNUSED; 530 } 531 532 static inline bool dsa_port_master_is_operational(struct dsa_port *dp) 533 { 534 return dsa_port_is_cpu(dp) && dp->master_admin_up && 535 dp->master_oper_up; 536 } 537 538 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 539 { 540 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 541 } 542 543 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 544 { 545 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 546 } 547 548 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 549 { 550 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 551 } 552 553 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 554 { 555 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 556 } 557 558 #define dsa_tree_for_each_user_port(_dp, _dst) \ 559 list_for_each_entry((_dp), &(_dst)->ports, list) \ 560 if (dsa_port_is_user((_dp))) 561 562 #define dsa_tree_for_each_user_port_continue_reverse(_dp, _dst) \ 563 list_for_each_entry_continue_reverse((_dp), &(_dst)->ports, list) \ 564 if (dsa_port_is_user((_dp))) 565 566 #define dsa_tree_for_each_cpu_port(_dp, _dst) \ 567 list_for_each_entry((_dp), &(_dst)->ports, list) \ 568 if (dsa_port_is_cpu((_dp))) 569 570 #define dsa_switch_for_each_port(_dp, _ds) \ 571 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \ 572 if ((_dp)->ds == (_ds)) 573 574 #define dsa_switch_for_each_port_safe(_dp, _next, _ds) \ 575 list_for_each_entry_safe((_dp), (_next), &(_ds)->dst->ports, list) \ 576 if ((_dp)->ds == (_ds)) 577 578 #define dsa_switch_for_each_port_continue_reverse(_dp, _ds) \ 579 list_for_each_entry_continue_reverse((_dp), &(_ds)->dst->ports, list) \ 580 if ((_dp)->ds == (_ds)) 581 582 #define dsa_switch_for_each_available_port(_dp, _ds) \ 583 dsa_switch_for_each_port((_dp), (_ds)) \ 584 if (!dsa_port_is_unused((_dp))) 585 586 #define dsa_switch_for_each_user_port(_dp, _ds) \ 587 dsa_switch_for_each_port((_dp), (_ds)) \ 588 if (dsa_port_is_user((_dp))) 589 590 #define dsa_switch_for_each_cpu_port(_dp, _ds) \ 591 dsa_switch_for_each_port((_dp), (_ds)) \ 592 if (dsa_port_is_cpu((_dp))) 593 594 #define dsa_switch_for_each_cpu_port_continue_reverse(_dp, _ds) \ 595 dsa_switch_for_each_port_continue_reverse((_dp), (_ds)) \ 596 if (dsa_port_is_cpu((_dp))) 597 598 static inline u32 dsa_user_ports(struct dsa_switch *ds) 599 { 600 struct dsa_port *dp; 601 u32 mask = 0; 602 603 dsa_switch_for_each_user_port(dp, ds) 604 mask |= BIT(dp->index); 605 606 return mask; 607 } 608 609 static inline u32 dsa_cpu_ports(struct dsa_switch *ds) 610 { 611 struct dsa_port *cpu_dp; 612 u32 mask = 0; 613 614 dsa_switch_for_each_cpu_port(cpu_dp, ds) 615 mask |= BIT(cpu_dp->index); 616 617 return mask; 618 } 619 620 /* Return the local port used to reach an arbitrary switch device */ 621 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device) 622 { 623 struct dsa_switch_tree *dst = ds->dst; 624 struct dsa_link *dl; 625 626 list_for_each_entry(dl, &dst->rtable, list) 627 if (dl->dp->ds == ds && dl->link_dp->ds->index == device) 628 return dl->dp->index; 629 630 return ds->num_ports; 631 } 632 633 /* Return the local port used to reach an arbitrary switch port */ 634 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 635 int port) 636 { 637 if (device == ds->index) 638 return port; 639 else 640 return dsa_routing_port(ds, device); 641 } 642 643 /* Return the local port used to reach the dedicated CPU port */ 644 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 645 { 646 const struct dsa_port *dp = dsa_to_port(ds, port); 647 const struct dsa_port *cpu_dp = dp->cpu_dp; 648 649 if (!cpu_dp) 650 return port; 651 652 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 653 } 654 655 /* Return true if this is the local port used to reach the CPU port */ 656 static inline bool dsa_is_upstream_port(struct dsa_switch *ds, int port) 657 { 658 if (dsa_is_unused_port(ds, port)) 659 return false; 660 661 return port == dsa_upstream_port(ds, port); 662 } 663 664 /* Return true if this is a DSA port leading away from the CPU */ 665 static inline bool dsa_is_downstream_port(struct dsa_switch *ds, int port) 666 { 667 return dsa_is_dsa_port(ds, port) && !dsa_is_upstream_port(ds, port); 668 } 669 670 /* Return the local port used to reach the CPU port */ 671 static inline unsigned int dsa_switch_upstream_port(struct dsa_switch *ds) 672 { 673 struct dsa_port *dp; 674 675 dsa_switch_for_each_available_port(dp, ds) { 676 return dsa_upstream_port(ds, dp->index); 677 } 678 679 return ds->num_ports; 680 } 681 682 /* Return true if @upstream_ds is an upstream switch of @downstream_ds, meaning 683 * that the routing port from @downstream_ds to @upstream_ds is also the port 684 * which @downstream_ds uses to reach its dedicated CPU. 685 */ 686 static inline bool dsa_switch_is_upstream_of(struct dsa_switch *upstream_ds, 687 struct dsa_switch *downstream_ds) 688 { 689 int routing_port; 690 691 if (upstream_ds == downstream_ds) 692 return true; 693 694 routing_port = dsa_routing_port(downstream_ds, upstream_ds->index); 695 696 return dsa_is_upstream_port(downstream_ds, routing_port); 697 } 698 699 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 700 { 701 const struct dsa_switch *ds = dp->ds; 702 703 if (ds->vlan_filtering_is_global) 704 return ds->vlan_filtering; 705 else 706 return dp->vlan_filtering; 707 } 708 709 static inline unsigned int dsa_port_lag_id_get(struct dsa_port *dp) 710 { 711 return dp->lag ? dp->lag->id : 0; 712 } 713 714 static inline struct net_device *dsa_port_lag_dev_get(struct dsa_port *dp) 715 { 716 return dp->lag ? dp->lag->dev : NULL; 717 } 718 719 static inline bool dsa_port_offloads_lag(struct dsa_port *dp, 720 const struct dsa_lag *lag) 721 { 722 return dsa_port_lag_dev_get(dp) == lag->dev; 723 } 724 725 static inline struct net_device *dsa_port_to_master(const struct dsa_port *dp) 726 { 727 return dp->cpu_dp->master; 728 } 729 730 static inline 731 struct net_device *dsa_port_to_bridge_port(const struct dsa_port *dp) 732 { 733 if (!dp->bridge) 734 return NULL; 735 736 if (dp->lag) 737 return dp->lag->dev; 738 else if (dp->hsr_dev) 739 return dp->hsr_dev; 740 741 return dp->slave; 742 } 743 744 static inline struct net_device * 745 dsa_port_bridge_dev_get(const struct dsa_port *dp) 746 { 747 return dp->bridge ? dp->bridge->dev : NULL; 748 } 749 750 static inline unsigned int dsa_port_bridge_num_get(struct dsa_port *dp) 751 { 752 return dp->bridge ? dp->bridge->num : 0; 753 } 754 755 static inline bool dsa_port_bridge_same(const struct dsa_port *a, 756 const struct dsa_port *b) 757 { 758 struct net_device *br_a = dsa_port_bridge_dev_get(a); 759 struct net_device *br_b = dsa_port_bridge_dev_get(b); 760 761 /* Standalone ports are not in the same bridge with one another */ 762 return (!br_a || !br_b) ? false : (br_a == br_b); 763 } 764 765 static inline bool dsa_port_offloads_bridge_port(struct dsa_port *dp, 766 const struct net_device *dev) 767 { 768 return dsa_port_to_bridge_port(dp) == dev; 769 } 770 771 static inline bool 772 dsa_port_offloads_bridge_dev(struct dsa_port *dp, 773 const struct net_device *bridge_dev) 774 { 775 /* DSA ports connected to a bridge, and event was emitted 776 * for the bridge. 777 */ 778 return dsa_port_bridge_dev_get(dp) == bridge_dev; 779 } 780 781 static inline bool dsa_port_offloads_bridge(struct dsa_port *dp, 782 const struct dsa_bridge *bridge) 783 { 784 return dsa_port_bridge_dev_get(dp) == bridge->dev; 785 } 786 787 /* Returns true if any port of this tree offloads the given net_device */ 788 static inline bool dsa_tree_offloads_bridge_port(struct dsa_switch_tree *dst, 789 const struct net_device *dev) 790 { 791 struct dsa_port *dp; 792 793 list_for_each_entry(dp, &dst->ports, list) 794 if (dsa_port_offloads_bridge_port(dp, dev)) 795 return true; 796 797 return false; 798 } 799 800 /* Returns true if any port of this tree offloads the given bridge */ 801 static inline bool 802 dsa_tree_offloads_bridge_dev(struct dsa_switch_tree *dst, 803 const struct net_device *bridge_dev) 804 { 805 struct dsa_port *dp; 806 807 list_for_each_entry(dp, &dst->ports, list) 808 if (dsa_port_offloads_bridge_dev(dp, bridge_dev)) 809 return true; 810 811 return false; 812 } 813 814 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 815 bool is_static, void *data); 816 struct dsa_switch_ops { 817 /* 818 * Tagging protocol helpers called for the CPU ports and DSA links. 819 * @get_tag_protocol retrieves the initial tagging protocol and is 820 * mandatory. Switches which can operate using multiple tagging 821 * protocols should implement @change_tag_protocol and report in 822 * @get_tag_protocol the tagger in current use. 823 */ 824 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 825 int port, 826 enum dsa_tag_protocol mprot); 827 int (*change_tag_protocol)(struct dsa_switch *ds, 828 enum dsa_tag_protocol proto); 829 /* 830 * Method for switch drivers to connect to the tagging protocol driver 831 * in current use. The switch driver can provide handlers for certain 832 * types of packets for switch management. 833 */ 834 int (*connect_tag_protocol)(struct dsa_switch *ds, 835 enum dsa_tag_protocol proto); 836 837 int (*port_change_master)(struct dsa_switch *ds, int port, 838 struct net_device *master, 839 struct netlink_ext_ack *extack); 840 841 /* Optional switch-wide initialization and destruction methods */ 842 int (*setup)(struct dsa_switch *ds); 843 void (*teardown)(struct dsa_switch *ds); 844 845 /* Per-port initialization and destruction methods. Mandatory if the 846 * driver registers devlink port regions, optional otherwise. 847 */ 848 int (*port_setup)(struct dsa_switch *ds, int port); 849 void (*port_teardown)(struct dsa_switch *ds, int port); 850 851 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 852 853 /* 854 * Access to the switch's PHY registers. 855 */ 856 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 857 int (*phy_write)(struct dsa_switch *ds, int port, 858 int regnum, u16 val); 859 860 /* 861 * Link state adjustment (called from libphy) 862 */ 863 void (*adjust_link)(struct dsa_switch *ds, int port, 864 struct phy_device *phydev); 865 void (*fixed_link_update)(struct dsa_switch *ds, int port, 866 struct fixed_phy_status *st); 867 868 /* 869 * PHYLINK integration 870 */ 871 void (*phylink_get_caps)(struct dsa_switch *ds, int port, 872 struct phylink_config *config); 873 void (*phylink_validate)(struct dsa_switch *ds, int port, 874 unsigned long *supported, 875 struct phylink_link_state *state); 876 struct phylink_pcs *(*phylink_mac_select_pcs)(struct dsa_switch *ds, 877 int port, 878 phy_interface_t iface); 879 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 880 struct phylink_link_state *state); 881 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 882 unsigned int mode, 883 const struct phylink_link_state *state); 884 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 885 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 886 unsigned int mode, 887 phy_interface_t interface); 888 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 889 unsigned int mode, 890 phy_interface_t interface, 891 struct phy_device *phydev, 892 int speed, int duplex, 893 bool tx_pause, bool rx_pause); 894 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 895 struct phylink_link_state *state); 896 /* 897 * Port statistics counters. 898 */ 899 void (*get_strings)(struct dsa_switch *ds, int port, 900 u32 stringset, uint8_t *data); 901 void (*get_ethtool_stats)(struct dsa_switch *ds, 902 int port, uint64_t *data); 903 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 904 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 905 int port, uint64_t *data); 906 void (*get_eth_phy_stats)(struct dsa_switch *ds, int port, 907 struct ethtool_eth_phy_stats *phy_stats); 908 void (*get_eth_mac_stats)(struct dsa_switch *ds, int port, 909 struct ethtool_eth_mac_stats *mac_stats); 910 void (*get_eth_ctrl_stats)(struct dsa_switch *ds, int port, 911 struct ethtool_eth_ctrl_stats *ctrl_stats); 912 void (*get_rmon_stats)(struct dsa_switch *ds, int port, 913 struct ethtool_rmon_stats *rmon_stats, 914 const struct ethtool_rmon_hist_range **ranges); 915 void (*get_stats64)(struct dsa_switch *ds, int port, 916 struct rtnl_link_stats64 *s); 917 void (*get_pause_stats)(struct dsa_switch *ds, int port, 918 struct ethtool_pause_stats *pause_stats); 919 void (*self_test)(struct dsa_switch *ds, int port, 920 struct ethtool_test *etest, u64 *data); 921 922 /* 923 * ethtool Wake-on-LAN 924 */ 925 void (*get_wol)(struct dsa_switch *ds, int port, 926 struct ethtool_wolinfo *w); 927 int (*set_wol)(struct dsa_switch *ds, int port, 928 struct ethtool_wolinfo *w); 929 930 /* 931 * ethtool timestamp info 932 */ 933 int (*get_ts_info)(struct dsa_switch *ds, int port, 934 struct ethtool_ts_info *ts); 935 936 /* 937 * DCB ops 938 */ 939 int (*port_get_default_prio)(struct dsa_switch *ds, int port); 940 int (*port_set_default_prio)(struct dsa_switch *ds, int port, 941 u8 prio); 942 int (*port_get_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp); 943 int (*port_add_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp, 944 u8 prio); 945 int (*port_del_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp, 946 u8 prio); 947 948 /* 949 * Suspend and resume 950 */ 951 int (*suspend)(struct dsa_switch *ds); 952 int (*resume)(struct dsa_switch *ds); 953 954 /* 955 * Port enable/disable 956 */ 957 int (*port_enable)(struct dsa_switch *ds, int port, 958 struct phy_device *phy); 959 void (*port_disable)(struct dsa_switch *ds, int port); 960 961 /* 962 * Port's MAC EEE settings 963 */ 964 int (*set_mac_eee)(struct dsa_switch *ds, int port, 965 struct ethtool_eee *e); 966 int (*get_mac_eee)(struct dsa_switch *ds, int port, 967 struct ethtool_eee *e); 968 969 /* EEPROM access */ 970 int (*get_eeprom_len)(struct dsa_switch *ds); 971 int (*get_eeprom)(struct dsa_switch *ds, 972 struct ethtool_eeprom *eeprom, u8 *data); 973 int (*set_eeprom)(struct dsa_switch *ds, 974 struct ethtool_eeprom *eeprom, u8 *data); 975 976 /* 977 * Register access. 978 */ 979 int (*get_regs_len)(struct dsa_switch *ds, int port); 980 void (*get_regs)(struct dsa_switch *ds, int port, 981 struct ethtool_regs *regs, void *p); 982 983 /* 984 * Upper device tracking. 985 */ 986 int (*port_prechangeupper)(struct dsa_switch *ds, int port, 987 struct netdev_notifier_changeupper_info *info); 988 989 /* 990 * Bridge integration 991 */ 992 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 993 int (*port_bridge_join)(struct dsa_switch *ds, int port, 994 struct dsa_bridge bridge, 995 bool *tx_fwd_offload, 996 struct netlink_ext_ack *extack); 997 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 998 struct dsa_bridge bridge); 999 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 1000 u8 state); 1001 int (*port_mst_state_set)(struct dsa_switch *ds, int port, 1002 const struct switchdev_mst_state *state); 1003 void (*port_fast_age)(struct dsa_switch *ds, int port); 1004 int (*port_vlan_fast_age)(struct dsa_switch *ds, int port, u16 vid); 1005 int (*port_pre_bridge_flags)(struct dsa_switch *ds, int port, 1006 struct switchdev_brport_flags flags, 1007 struct netlink_ext_ack *extack); 1008 int (*port_bridge_flags)(struct dsa_switch *ds, int port, 1009 struct switchdev_brport_flags flags, 1010 struct netlink_ext_ack *extack); 1011 void (*port_set_host_flood)(struct dsa_switch *ds, int port, 1012 bool uc, bool mc); 1013 1014 /* 1015 * VLAN support 1016 */ 1017 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 1018 bool vlan_filtering, 1019 struct netlink_ext_ack *extack); 1020 int (*port_vlan_add)(struct dsa_switch *ds, int port, 1021 const struct switchdev_obj_port_vlan *vlan, 1022 struct netlink_ext_ack *extack); 1023 int (*port_vlan_del)(struct dsa_switch *ds, int port, 1024 const struct switchdev_obj_port_vlan *vlan); 1025 int (*vlan_msti_set)(struct dsa_switch *ds, struct dsa_bridge bridge, 1026 const struct switchdev_vlan_msti *msti); 1027 1028 /* 1029 * Forwarding database 1030 */ 1031 int (*port_fdb_add)(struct dsa_switch *ds, int port, 1032 const unsigned char *addr, u16 vid, 1033 struct dsa_db db); 1034 int (*port_fdb_del)(struct dsa_switch *ds, int port, 1035 const unsigned char *addr, u16 vid, 1036 struct dsa_db db); 1037 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 1038 dsa_fdb_dump_cb_t *cb, void *data); 1039 int (*lag_fdb_add)(struct dsa_switch *ds, struct dsa_lag lag, 1040 const unsigned char *addr, u16 vid, 1041 struct dsa_db db); 1042 int (*lag_fdb_del)(struct dsa_switch *ds, struct dsa_lag lag, 1043 const unsigned char *addr, u16 vid, 1044 struct dsa_db db); 1045 1046 /* 1047 * Multicast database 1048 */ 1049 int (*port_mdb_add)(struct dsa_switch *ds, int port, 1050 const struct switchdev_obj_port_mdb *mdb, 1051 struct dsa_db db); 1052 int (*port_mdb_del)(struct dsa_switch *ds, int port, 1053 const struct switchdev_obj_port_mdb *mdb, 1054 struct dsa_db db); 1055 /* 1056 * RXNFC 1057 */ 1058 int (*get_rxnfc)(struct dsa_switch *ds, int port, 1059 struct ethtool_rxnfc *nfc, u32 *rule_locs); 1060 int (*set_rxnfc)(struct dsa_switch *ds, int port, 1061 struct ethtool_rxnfc *nfc); 1062 1063 /* 1064 * TC integration 1065 */ 1066 int (*cls_flower_add)(struct dsa_switch *ds, int port, 1067 struct flow_cls_offload *cls, bool ingress); 1068 int (*cls_flower_del)(struct dsa_switch *ds, int port, 1069 struct flow_cls_offload *cls, bool ingress); 1070 int (*cls_flower_stats)(struct dsa_switch *ds, int port, 1071 struct flow_cls_offload *cls, bool ingress); 1072 int (*port_mirror_add)(struct dsa_switch *ds, int port, 1073 struct dsa_mall_mirror_tc_entry *mirror, 1074 bool ingress, struct netlink_ext_ack *extack); 1075 void (*port_mirror_del)(struct dsa_switch *ds, int port, 1076 struct dsa_mall_mirror_tc_entry *mirror); 1077 int (*port_policer_add)(struct dsa_switch *ds, int port, 1078 struct dsa_mall_policer_tc_entry *policer); 1079 void (*port_policer_del)(struct dsa_switch *ds, int port); 1080 int (*port_setup_tc)(struct dsa_switch *ds, int port, 1081 enum tc_setup_type type, void *type_data); 1082 1083 /* 1084 * Cross-chip operations 1085 */ 1086 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index, 1087 int sw_index, int port, 1088 struct dsa_bridge bridge, 1089 struct netlink_ext_ack *extack); 1090 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index, 1091 int sw_index, int port, 1092 struct dsa_bridge bridge); 1093 int (*crosschip_lag_change)(struct dsa_switch *ds, int sw_index, 1094 int port); 1095 int (*crosschip_lag_join)(struct dsa_switch *ds, int sw_index, 1096 int port, struct dsa_lag lag, 1097 struct netdev_lag_upper_info *info); 1098 int (*crosschip_lag_leave)(struct dsa_switch *ds, int sw_index, 1099 int port, struct dsa_lag lag); 1100 1101 /* 1102 * PTP functionality 1103 */ 1104 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 1105 struct ifreq *ifr); 1106 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 1107 struct ifreq *ifr); 1108 void (*port_txtstamp)(struct dsa_switch *ds, int port, 1109 struct sk_buff *skb); 1110 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 1111 struct sk_buff *skb, unsigned int type); 1112 1113 /* Devlink parameters, etc */ 1114 int (*devlink_param_get)(struct dsa_switch *ds, u32 id, 1115 struct devlink_param_gset_ctx *ctx); 1116 int (*devlink_param_set)(struct dsa_switch *ds, u32 id, 1117 struct devlink_param_gset_ctx *ctx); 1118 int (*devlink_info_get)(struct dsa_switch *ds, 1119 struct devlink_info_req *req, 1120 struct netlink_ext_ack *extack); 1121 int (*devlink_sb_pool_get)(struct dsa_switch *ds, 1122 unsigned int sb_index, u16 pool_index, 1123 struct devlink_sb_pool_info *pool_info); 1124 int (*devlink_sb_pool_set)(struct dsa_switch *ds, unsigned int sb_index, 1125 u16 pool_index, u32 size, 1126 enum devlink_sb_threshold_type threshold_type, 1127 struct netlink_ext_ack *extack); 1128 int (*devlink_sb_port_pool_get)(struct dsa_switch *ds, int port, 1129 unsigned int sb_index, u16 pool_index, 1130 u32 *p_threshold); 1131 int (*devlink_sb_port_pool_set)(struct dsa_switch *ds, int port, 1132 unsigned int sb_index, u16 pool_index, 1133 u32 threshold, 1134 struct netlink_ext_ack *extack); 1135 int (*devlink_sb_tc_pool_bind_get)(struct dsa_switch *ds, int port, 1136 unsigned int sb_index, u16 tc_index, 1137 enum devlink_sb_pool_type pool_type, 1138 u16 *p_pool_index, u32 *p_threshold); 1139 int (*devlink_sb_tc_pool_bind_set)(struct dsa_switch *ds, int port, 1140 unsigned int sb_index, u16 tc_index, 1141 enum devlink_sb_pool_type pool_type, 1142 u16 pool_index, u32 threshold, 1143 struct netlink_ext_ack *extack); 1144 int (*devlink_sb_occ_snapshot)(struct dsa_switch *ds, 1145 unsigned int sb_index); 1146 int (*devlink_sb_occ_max_clear)(struct dsa_switch *ds, 1147 unsigned int sb_index); 1148 int (*devlink_sb_occ_port_pool_get)(struct dsa_switch *ds, int port, 1149 unsigned int sb_index, u16 pool_index, 1150 u32 *p_cur, u32 *p_max); 1151 int (*devlink_sb_occ_tc_port_bind_get)(struct dsa_switch *ds, int port, 1152 unsigned int sb_index, u16 tc_index, 1153 enum devlink_sb_pool_type pool_type, 1154 u32 *p_cur, u32 *p_max); 1155 1156 /* 1157 * MTU change functionality. Switches can also adjust their MRU through 1158 * this method. By MTU, one understands the SDU (L2 payload) length. 1159 * If the switch needs to account for the DSA tag on the CPU port, this 1160 * method needs to do so privately. 1161 */ 1162 int (*port_change_mtu)(struct dsa_switch *ds, int port, 1163 int new_mtu); 1164 int (*port_max_mtu)(struct dsa_switch *ds, int port); 1165 1166 /* 1167 * LAG integration 1168 */ 1169 int (*port_lag_change)(struct dsa_switch *ds, int port); 1170 int (*port_lag_join)(struct dsa_switch *ds, int port, 1171 struct dsa_lag lag, 1172 struct netdev_lag_upper_info *info); 1173 int (*port_lag_leave)(struct dsa_switch *ds, int port, 1174 struct dsa_lag lag); 1175 1176 /* 1177 * HSR integration 1178 */ 1179 int (*port_hsr_join)(struct dsa_switch *ds, int port, 1180 struct net_device *hsr); 1181 int (*port_hsr_leave)(struct dsa_switch *ds, int port, 1182 struct net_device *hsr); 1183 1184 /* 1185 * MRP integration 1186 */ 1187 int (*port_mrp_add)(struct dsa_switch *ds, int port, 1188 const struct switchdev_obj_mrp *mrp); 1189 int (*port_mrp_del)(struct dsa_switch *ds, int port, 1190 const struct switchdev_obj_mrp *mrp); 1191 int (*port_mrp_add_ring_role)(struct dsa_switch *ds, int port, 1192 const struct switchdev_obj_ring_role_mrp *mrp); 1193 int (*port_mrp_del_ring_role)(struct dsa_switch *ds, int port, 1194 const struct switchdev_obj_ring_role_mrp *mrp); 1195 1196 /* 1197 * tag_8021q operations 1198 */ 1199 int (*tag_8021q_vlan_add)(struct dsa_switch *ds, int port, u16 vid, 1200 u16 flags); 1201 int (*tag_8021q_vlan_del)(struct dsa_switch *ds, int port, u16 vid); 1202 1203 /* 1204 * DSA master tracking operations 1205 */ 1206 void (*master_state_change)(struct dsa_switch *ds, 1207 const struct net_device *master, 1208 bool operational); 1209 }; 1210 1211 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \ 1212 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \ 1213 dsa_devlink_param_get, dsa_devlink_param_set, NULL) 1214 1215 int dsa_devlink_param_get(struct devlink *dl, u32 id, 1216 struct devlink_param_gset_ctx *ctx); 1217 int dsa_devlink_param_set(struct devlink *dl, u32 id, 1218 struct devlink_param_gset_ctx *ctx); 1219 int dsa_devlink_params_register(struct dsa_switch *ds, 1220 const struct devlink_param *params, 1221 size_t params_count); 1222 void dsa_devlink_params_unregister(struct dsa_switch *ds, 1223 const struct devlink_param *params, 1224 size_t params_count); 1225 int dsa_devlink_resource_register(struct dsa_switch *ds, 1226 const char *resource_name, 1227 u64 resource_size, 1228 u64 resource_id, 1229 u64 parent_resource_id, 1230 const struct devlink_resource_size_params *size_params); 1231 1232 void dsa_devlink_resources_unregister(struct dsa_switch *ds); 1233 1234 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds, 1235 u64 resource_id, 1236 devlink_resource_occ_get_t *occ_get, 1237 void *occ_get_priv); 1238 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds, 1239 u64 resource_id); 1240 struct devlink_region * 1241 dsa_devlink_region_create(struct dsa_switch *ds, 1242 const struct devlink_region_ops *ops, 1243 u32 region_max_snapshots, u64 region_size); 1244 struct devlink_region * 1245 dsa_devlink_port_region_create(struct dsa_switch *ds, 1246 int port, 1247 const struct devlink_port_region_ops *ops, 1248 u32 region_max_snapshots, u64 region_size); 1249 void dsa_devlink_region_destroy(struct devlink_region *region); 1250 1251 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev); 1252 1253 struct dsa_devlink_priv { 1254 struct dsa_switch *ds; 1255 }; 1256 1257 static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl) 1258 { 1259 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 1260 1261 return dl_priv->ds; 1262 } 1263 1264 static inline 1265 struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port) 1266 { 1267 struct devlink *dl = port->devlink; 1268 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 1269 1270 return dl_priv->ds; 1271 } 1272 1273 static inline int dsa_devlink_port_to_port(struct devlink_port *port) 1274 { 1275 return port->index; 1276 } 1277 1278 struct dsa_switch_driver { 1279 struct list_head list; 1280 const struct dsa_switch_ops *ops; 1281 }; 1282 1283 struct net_device *dsa_dev_to_net_device(struct device *dev); 1284 1285 bool dsa_fdb_present_in_other_db(struct dsa_switch *ds, int port, 1286 const unsigned char *addr, u16 vid, 1287 struct dsa_db db); 1288 bool dsa_mdb_present_in_other_db(struct dsa_switch *ds, int port, 1289 const struct switchdev_obj_port_mdb *mdb, 1290 struct dsa_db db); 1291 1292 /* Keep inline for faster access in hot path */ 1293 static inline bool netdev_uses_dsa(const struct net_device *dev) 1294 { 1295 #if IS_ENABLED(CONFIG_NET_DSA) 1296 return dev->dsa_ptr && dev->dsa_ptr->rcv; 1297 #endif 1298 return false; 1299 } 1300 1301 /* All DSA tags that push the EtherType to the right (basically all except tail 1302 * tags, which don't break dissection) can be treated the same from the 1303 * perspective of the flow dissector. 1304 * 1305 * We need to return: 1306 * - offset: the (B - A) difference between: 1307 * A. the position of the real EtherType and 1308 * B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes 1309 * after the normal EtherType was supposed to be) 1310 * The offset in bytes is exactly equal to the tagger overhead (and half of 1311 * that, in __be16 shorts). 1312 * 1313 * - proto: the value of the real EtherType. 1314 */ 1315 static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb, 1316 __be16 *proto, int *offset) 1317 { 1318 #if IS_ENABLED(CONFIG_NET_DSA) 1319 const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops; 1320 int tag_len = ops->needed_headroom; 1321 1322 *offset = tag_len; 1323 *proto = ((__be16 *)skb->data)[(tag_len / 2) - 1]; 1324 #endif 1325 } 1326 1327 #if IS_ENABLED(CONFIG_NET_DSA) 1328 static inline int __dsa_netdevice_ops_check(struct net_device *dev) 1329 { 1330 int err = -EOPNOTSUPP; 1331 1332 if (!dev->dsa_ptr) 1333 return err; 1334 1335 if (!dev->dsa_ptr->netdev_ops) 1336 return err; 1337 1338 return 0; 1339 } 1340 1341 static inline int dsa_ndo_eth_ioctl(struct net_device *dev, struct ifreq *ifr, 1342 int cmd) 1343 { 1344 const struct dsa_netdevice_ops *ops; 1345 int err; 1346 1347 err = __dsa_netdevice_ops_check(dev); 1348 if (err) 1349 return err; 1350 1351 ops = dev->dsa_ptr->netdev_ops; 1352 1353 return ops->ndo_eth_ioctl(dev, ifr, cmd); 1354 } 1355 #else 1356 static inline int dsa_ndo_eth_ioctl(struct net_device *dev, struct ifreq *ifr, 1357 int cmd) 1358 { 1359 return -EOPNOTSUPP; 1360 } 1361 #endif 1362 1363 void dsa_unregister_switch(struct dsa_switch *ds); 1364 int dsa_register_switch(struct dsa_switch *ds); 1365 void dsa_switch_shutdown(struct dsa_switch *ds); 1366 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index); 1367 void dsa_flush_workqueue(void); 1368 #ifdef CONFIG_PM_SLEEP 1369 int dsa_switch_suspend(struct dsa_switch *ds); 1370 int dsa_switch_resume(struct dsa_switch *ds); 1371 #else 1372 static inline int dsa_switch_suspend(struct dsa_switch *ds) 1373 { 1374 return 0; 1375 } 1376 static inline int dsa_switch_resume(struct dsa_switch *ds) 1377 { 1378 return 0; 1379 } 1380 #endif /* CONFIG_PM_SLEEP */ 1381 1382 #if IS_ENABLED(CONFIG_NET_DSA) 1383 bool dsa_slave_dev_check(const struct net_device *dev); 1384 #else 1385 static inline bool dsa_slave_dev_check(const struct net_device *dev) 1386 { 1387 return false; 1388 } 1389 #endif 1390 1391 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 1392 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 1393 1394 struct dsa_tag_driver { 1395 const struct dsa_device_ops *ops; 1396 struct list_head list; 1397 struct module *owner; 1398 }; 1399 1400 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 1401 unsigned int count, 1402 struct module *owner); 1403 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 1404 unsigned int count); 1405 1406 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 1407 static int __init dsa_tag_driver_module_init(void) \ 1408 { \ 1409 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 1410 THIS_MODULE); \ 1411 return 0; \ 1412 } \ 1413 module_init(dsa_tag_driver_module_init); \ 1414 \ 1415 static void __exit dsa_tag_driver_module_exit(void) \ 1416 { \ 1417 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 1418 } \ 1419 module_exit(dsa_tag_driver_module_exit) 1420 1421 /** 1422 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 1423 * drivers 1424 * @__ops_array: Array of tag driver structures 1425 * 1426 * Helper macro for DSA tag drivers which do not do anything special 1427 * in module init/exit. Each module may only use this macro once, and 1428 * calling it replaces module_init() and module_exit(). 1429 */ 1430 #define module_dsa_tag_drivers(__ops_array) \ 1431 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 1432 1433 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 1434 1435 /* Create a static structure we can build a linked list of dsa_tag 1436 * drivers 1437 */ 1438 #define DSA_TAG_DRIVER(__ops) \ 1439 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 1440 .ops = &__ops, \ 1441 } 1442 1443 /** 1444 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 1445 * driver 1446 * @__ops: Single tag driver structures 1447 * 1448 * Helper macro for DSA tag drivers which do not do anything special 1449 * in module init/exit. Each module may only use this macro once, and 1450 * calling it replaces module_init() and module_exit(). 1451 */ 1452 #define module_dsa_tag_driver(__ops) \ 1453 DSA_TAG_DRIVER(__ops); \ 1454 \ 1455 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 1456 &DSA_TAG_DRIVER_NAME(__ops) \ 1457 }; \ 1458 module_dsa_tag_drivers(dsa_tag_driver_array) 1459 #endif 1460 1461