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 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 /* Master state bits, valid only on CPU ports */ 294 u8 master_admin_up:1; 295 u8 master_oper_up:1; 296 297 /* Valid only on user ports */ 298 u8 cpu_port_in_lag:1; 299 300 u8 setup:1; 301 302 struct device_node *dn; 303 unsigned int ageing_time; 304 305 struct dsa_bridge *bridge; 306 struct devlink_port devlink_port; 307 struct phylink *pl; 308 struct phylink_config pl_config; 309 struct dsa_lag *lag; 310 struct net_device *hsr_dev; 311 312 struct list_head list; 313 314 /* 315 * Original copy of the master netdev ethtool_ops 316 */ 317 const struct ethtool_ops *orig_ethtool_ops; 318 319 /* 320 * Original copy of the master netdev net_device_ops 321 */ 322 const struct dsa_netdevice_ops *netdev_ops; 323 324 /* List of MAC addresses that must be forwarded on this port. 325 * These are only valid on CPU ports and DSA links. 326 */ 327 struct mutex addr_lists_lock; 328 struct list_head fdbs; 329 struct list_head mdbs; 330 331 /* List of VLANs that CPU and DSA ports are members of. */ 332 struct mutex vlans_lock; 333 struct list_head vlans; 334 }; 335 336 /* TODO: ideally DSA ports would have a single dp->link_dp member, 337 * and no dst->rtable nor this struct dsa_link would be needed, 338 * but this would require some more complex tree walking, 339 * so keep it stupid at the moment and list them all. 340 */ 341 struct dsa_link { 342 struct dsa_port *dp; 343 struct dsa_port *link_dp; 344 struct list_head list; 345 }; 346 347 enum dsa_db_type { 348 DSA_DB_PORT, 349 DSA_DB_LAG, 350 DSA_DB_BRIDGE, 351 }; 352 353 struct dsa_db { 354 enum dsa_db_type type; 355 356 union { 357 const struct dsa_port *dp; 358 struct dsa_lag lag; 359 struct dsa_bridge bridge; 360 }; 361 }; 362 363 struct dsa_mac_addr { 364 unsigned char addr[ETH_ALEN]; 365 u16 vid; 366 refcount_t refcount; 367 struct list_head list; 368 struct dsa_db db; 369 }; 370 371 struct dsa_vlan { 372 u16 vid; 373 refcount_t refcount; 374 struct list_head list; 375 }; 376 377 struct dsa_switch { 378 struct device *dev; 379 380 /* 381 * Parent switch tree, and switch index. 382 */ 383 struct dsa_switch_tree *dst; 384 unsigned int index; 385 386 /* Warning: the following bit fields are not atomic, and updating them 387 * can only be done from code paths where concurrency is not possible 388 * (probe time or under rtnl_lock). 389 */ 390 u32 setup:1; 391 392 /* Disallow bridge core from requesting different VLAN awareness 393 * settings on ports if not hardware-supported 394 */ 395 u32 vlan_filtering_is_global:1; 396 397 /* Keep VLAN filtering enabled on ports not offloading any upper */ 398 u32 needs_standalone_vlan_filtering:1; 399 400 /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges 401 * that have vlan_filtering=0. All drivers should ideally set this (and 402 * then the option would get removed), but it is unknown whether this 403 * would break things or not. 404 */ 405 u32 configure_vlan_while_not_filtering:1; 406 407 /* If the switch driver always programs the CPU port as egress tagged 408 * despite the VLAN configuration indicating otherwise, then setting 409 * @untag_bridge_pvid will force the DSA receive path to pop the 410 * bridge's default_pvid VLAN tagged frames to offer a consistent 411 * behavior between a vlan_filtering=0 and vlan_filtering=1 bridge 412 * device. 413 */ 414 u32 untag_bridge_pvid:1; 415 416 /* Let DSA manage the FDB entries towards the 417 * CPU, based on the software bridge database. 418 */ 419 u32 assisted_learning_on_cpu_port:1; 420 421 /* In case vlan_filtering_is_global is set, the VLAN awareness state 422 * should be retrieved from here and not from the per-port settings. 423 */ 424 u32 vlan_filtering:1; 425 426 /* For switches that only have the MRU configurable. To ensure the 427 * configured MTU is not exceeded, normalization of MRU on all bridged 428 * interfaces is needed. 429 */ 430 u32 mtu_enforcement_ingress:1; 431 432 /* Drivers that isolate the FDBs of multiple bridges must set this 433 * to true to receive the bridge as an argument in .port_fdb_{add,del} 434 * and .port_mdb_{add,del}. Otherwise, the bridge.num will always be 435 * passed as zero. 436 */ 437 u32 fdb_isolation:1; 438 439 /* Listener for switch fabric events */ 440 struct notifier_block nb; 441 442 /* 443 * Give the switch driver somewhere to hang its private data 444 * structure. 445 */ 446 void *priv; 447 448 void *tagger_data; 449 450 /* 451 * Configuration data for this switch. 452 */ 453 struct dsa_chip_data *cd; 454 455 /* 456 * The switch operations. 457 */ 458 const struct dsa_switch_ops *ops; 459 460 /* 461 * Slave mii_bus and devices for the individual ports. 462 */ 463 u32 phys_mii_mask; 464 struct mii_bus *slave_mii_bus; 465 466 /* Ageing Time limits in msecs */ 467 unsigned int ageing_time_min; 468 unsigned int ageing_time_max; 469 470 /* Storage for drivers using tag_8021q */ 471 struct dsa_8021q_context *tag_8021q_ctx; 472 473 /* devlink used to represent this switch device */ 474 struct devlink *devlink; 475 476 /* Number of switch port queues */ 477 unsigned int num_tx_queues; 478 479 /* Drivers that benefit from having an ID associated with each 480 * offloaded LAG should set this to the maximum number of 481 * supported IDs. DSA will then maintain a mapping of _at 482 * least_ these many IDs, accessible to drivers via 483 * dsa_lag_id(). 484 */ 485 unsigned int num_lag_ids; 486 487 /* Drivers that support bridge forwarding offload or FDB isolation 488 * should set this to the maximum number of bridges spanning the same 489 * switch tree (or all trees, in the case of cross-tree bridging 490 * support) that can be offloaded. 491 */ 492 unsigned int max_num_bridges; 493 494 unsigned int num_ports; 495 }; 496 497 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 498 { 499 struct dsa_switch_tree *dst = ds->dst; 500 struct dsa_port *dp; 501 502 list_for_each_entry(dp, &dst->ports, list) 503 if (dp->ds == ds && dp->index == p) 504 return dp; 505 506 return NULL; 507 } 508 509 static inline bool dsa_port_is_dsa(struct dsa_port *port) 510 { 511 return port->type == DSA_PORT_TYPE_DSA; 512 } 513 514 static inline bool dsa_port_is_cpu(struct dsa_port *port) 515 { 516 return port->type == DSA_PORT_TYPE_CPU; 517 } 518 519 static inline bool dsa_port_is_user(struct dsa_port *dp) 520 { 521 return dp->type == DSA_PORT_TYPE_USER; 522 } 523 524 static inline bool dsa_port_is_unused(struct dsa_port *dp) 525 { 526 return dp->type == DSA_PORT_TYPE_UNUSED; 527 } 528 529 static inline bool dsa_port_master_is_operational(struct dsa_port *dp) 530 { 531 return dsa_port_is_cpu(dp) && dp->master_admin_up && 532 dp->master_oper_up; 533 } 534 535 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 536 { 537 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 538 } 539 540 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 541 { 542 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 543 } 544 545 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 546 { 547 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 548 } 549 550 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 551 { 552 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 553 } 554 555 #define dsa_tree_for_each_user_port(_dp, _dst) \ 556 list_for_each_entry((_dp), &(_dst)->ports, list) \ 557 if (dsa_port_is_user((_dp))) 558 559 #define dsa_tree_for_each_user_port_continue_reverse(_dp, _dst) \ 560 list_for_each_entry_continue_reverse((_dp), &(_dst)->ports, list) \ 561 if (dsa_port_is_user((_dp))) 562 563 #define dsa_tree_for_each_cpu_port(_dp, _dst) \ 564 list_for_each_entry((_dp), &(_dst)->ports, list) \ 565 if (dsa_port_is_cpu((_dp))) 566 567 #define dsa_switch_for_each_port(_dp, _ds) \ 568 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \ 569 if ((_dp)->ds == (_ds)) 570 571 #define dsa_switch_for_each_port_safe(_dp, _next, _ds) \ 572 list_for_each_entry_safe((_dp), (_next), &(_ds)->dst->ports, list) \ 573 if ((_dp)->ds == (_ds)) 574 575 #define dsa_switch_for_each_port_continue_reverse(_dp, _ds) \ 576 list_for_each_entry_continue_reverse((_dp), &(_ds)->dst->ports, list) \ 577 if ((_dp)->ds == (_ds)) 578 579 #define dsa_switch_for_each_available_port(_dp, _ds) \ 580 dsa_switch_for_each_port((_dp), (_ds)) \ 581 if (!dsa_port_is_unused((_dp))) 582 583 #define dsa_switch_for_each_user_port(_dp, _ds) \ 584 dsa_switch_for_each_port((_dp), (_ds)) \ 585 if (dsa_port_is_user((_dp))) 586 587 #define dsa_switch_for_each_cpu_port(_dp, _ds) \ 588 dsa_switch_for_each_port((_dp), (_ds)) \ 589 if (dsa_port_is_cpu((_dp))) 590 591 #define dsa_switch_for_each_cpu_port_continue_reverse(_dp, _ds) \ 592 dsa_switch_for_each_port_continue_reverse((_dp), (_ds)) \ 593 if (dsa_port_is_cpu((_dp))) 594 595 static inline u32 dsa_user_ports(struct dsa_switch *ds) 596 { 597 struct dsa_port *dp; 598 u32 mask = 0; 599 600 dsa_switch_for_each_user_port(dp, ds) 601 mask |= BIT(dp->index); 602 603 return mask; 604 } 605 606 static inline u32 dsa_cpu_ports(struct dsa_switch *ds) 607 { 608 struct dsa_port *cpu_dp; 609 u32 mask = 0; 610 611 dsa_switch_for_each_cpu_port(cpu_dp, ds) 612 mask |= BIT(cpu_dp->index); 613 614 return mask; 615 } 616 617 /* Return the local port used to reach an arbitrary switch device */ 618 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device) 619 { 620 struct dsa_switch_tree *dst = ds->dst; 621 struct dsa_link *dl; 622 623 list_for_each_entry(dl, &dst->rtable, list) 624 if (dl->dp->ds == ds && dl->link_dp->ds->index == device) 625 return dl->dp->index; 626 627 return ds->num_ports; 628 } 629 630 /* Return the local port used to reach an arbitrary switch port */ 631 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 632 int port) 633 { 634 if (device == ds->index) 635 return port; 636 else 637 return dsa_routing_port(ds, device); 638 } 639 640 /* Return the local port used to reach the dedicated CPU port */ 641 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 642 { 643 const struct dsa_port *dp = dsa_to_port(ds, port); 644 const struct dsa_port *cpu_dp = dp->cpu_dp; 645 646 if (!cpu_dp) 647 return port; 648 649 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 650 } 651 652 /* Return true if this is the local port used to reach the CPU port */ 653 static inline bool dsa_is_upstream_port(struct dsa_switch *ds, int port) 654 { 655 if (dsa_is_unused_port(ds, port)) 656 return false; 657 658 return port == dsa_upstream_port(ds, port); 659 } 660 661 /* Return true if this is a DSA port leading away from the CPU */ 662 static inline bool dsa_is_downstream_port(struct dsa_switch *ds, int port) 663 { 664 return dsa_is_dsa_port(ds, port) && !dsa_is_upstream_port(ds, port); 665 } 666 667 /* Return the local port used to reach the CPU port */ 668 static inline unsigned int dsa_switch_upstream_port(struct dsa_switch *ds) 669 { 670 struct dsa_port *dp; 671 672 dsa_switch_for_each_available_port(dp, ds) { 673 return dsa_upstream_port(ds, dp->index); 674 } 675 676 return ds->num_ports; 677 } 678 679 /* Return true if @upstream_ds is an upstream switch of @downstream_ds, meaning 680 * that the routing port from @downstream_ds to @upstream_ds is also the port 681 * which @downstream_ds uses to reach its dedicated CPU. 682 */ 683 static inline bool dsa_switch_is_upstream_of(struct dsa_switch *upstream_ds, 684 struct dsa_switch *downstream_ds) 685 { 686 int routing_port; 687 688 if (upstream_ds == downstream_ds) 689 return true; 690 691 routing_port = dsa_routing_port(downstream_ds, upstream_ds->index); 692 693 return dsa_is_upstream_port(downstream_ds, routing_port); 694 } 695 696 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 697 { 698 const struct dsa_switch *ds = dp->ds; 699 700 if (ds->vlan_filtering_is_global) 701 return ds->vlan_filtering; 702 else 703 return dp->vlan_filtering; 704 } 705 706 static inline unsigned int dsa_port_lag_id_get(struct dsa_port *dp) 707 { 708 return dp->lag ? dp->lag->id : 0; 709 } 710 711 static inline struct net_device *dsa_port_lag_dev_get(struct dsa_port *dp) 712 { 713 return dp->lag ? dp->lag->dev : NULL; 714 } 715 716 static inline bool dsa_port_offloads_lag(struct dsa_port *dp, 717 const struct dsa_lag *lag) 718 { 719 return dsa_port_lag_dev_get(dp) == lag->dev; 720 } 721 722 static inline struct net_device *dsa_port_to_master(const struct dsa_port *dp) 723 { 724 if (dp->cpu_port_in_lag) 725 return dsa_port_lag_dev_get(dp->cpu_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 static inline bool dsa_port_tree_same(const struct dsa_port *a, 815 const struct dsa_port *b) 816 { 817 return a->ds->dst == b->ds->dst; 818 } 819 820 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 821 bool is_static, void *data); 822 struct dsa_switch_ops { 823 /* 824 * Tagging protocol helpers called for the CPU ports and DSA links. 825 * @get_tag_protocol retrieves the initial tagging protocol and is 826 * mandatory. Switches which can operate using multiple tagging 827 * protocols should implement @change_tag_protocol and report in 828 * @get_tag_protocol the tagger in current use. 829 */ 830 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 831 int port, 832 enum dsa_tag_protocol mprot); 833 int (*change_tag_protocol)(struct dsa_switch *ds, 834 enum dsa_tag_protocol proto); 835 /* 836 * Method for switch drivers to connect to the tagging protocol driver 837 * in current use. The switch driver can provide handlers for certain 838 * types of packets for switch management. 839 */ 840 int (*connect_tag_protocol)(struct dsa_switch *ds, 841 enum dsa_tag_protocol proto); 842 843 int (*port_change_master)(struct dsa_switch *ds, int port, 844 struct net_device *master, 845 struct netlink_ext_ack *extack); 846 847 /* Optional switch-wide initialization and destruction methods */ 848 int (*setup)(struct dsa_switch *ds); 849 void (*teardown)(struct dsa_switch *ds); 850 851 /* Per-port initialization and destruction methods. Mandatory if the 852 * driver registers devlink port regions, optional otherwise. 853 */ 854 int (*port_setup)(struct dsa_switch *ds, int port); 855 void (*port_teardown)(struct dsa_switch *ds, int port); 856 857 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 858 859 /* 860 * Access to the switch's PHY registers. 861 */ 862 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 863 int (*phy_write)(struct dsa_switch *ds, int port, 864 int regnum, u16 val); 865 866 /* 867 * Link state adjustment (called from libphy) 868 */ 869 void (*adjust_link)(struct dsa_switch *ds, int port, 870 struct phy_device *phydev); 871 void (*fixed_link_update)(struct dsa_switch *ds, int port, 872 struct fixed_phy_status *st); 873 874 /* 875 * PHYLINK integration 876 */ 877 void (*phylink_get_caps)(struct dsa_switch *ds, int port, 878 struct phylink_config *config); 879 struct phylink_pcs *(*phylink_mac_select_pcs)(struct dsa_switch *ds, 880 int port, 881 phy_interface_t iface); 882 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 883 struct phylink_link_state *state); 884 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 885 unsigned int mode, 886 const struct phylink_link_state *state); 887 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 888 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 889 unsigned int mode, 890 phy_interface_t interface); 891 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 892 unsigned int mode, 893 phy_interface_t interface, 894 struct phy_device *phydev, 895 int speed, int duplex, 896 bool tx_pause, bool rx_pause); 897 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 898 struct phylink_link_state *state); 899 /* 900 * Port statistics counters. 901 */ 902 void (*get_strings)(struct dsa_switch *ds, int port, 903 u32 stringset, uint8_t *data); 904 void (*get_ethtool_stats)(struct dsa_switch *ds, 905 int port, uint64_t *data); 906 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 907 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 908 int port, uint64_t *data); 909 void (*get_eth_phy_stats)(struct dsa_switch *ds, int port, 910 struct ethtool_eth_phy_stats *phy_stats); 911 void (*get_eth_mac_stats)(struct dsa_switch *ds, int port, 912 struct ethtool_eth_mac_stats *mac_stats); 913 void (*get_eth_ctrl_stats)(struct dsa_switch *ds, int port, 914 struct ethtool_eth_ctrl_stats *ctrl_stats); 915 void (*get_rmon_stats)(struct dsa_switch *ds, int port, 916 struct ethtool_rmon_stats *rmon_stats, 917 const struct ethtool_rmon_hist_range **ranges); 918 void (*get_stats64)(struct dsa_switch *ds, int port, 919 struct rtnl_link_stats64 *s); 920 void (*get_pause_stats)(struct dsa_switch *ds, int port, 921 struct ethtool_pause_stats *pause_stats); 922 void (*self_test)(struct dsa_switch *ds, int port, 923 struct ethtool_test *etest, u64 *data); 924 925 /* 926 * ethtool Wake-on-LAN 927 */ 928 void (*get_wol)(struct dsa_switch *ds, int port, 929 struct ethtool_wolinfo *w); 930 int (*set_wol)(struct dsa_switch *ds, int port, 931 struct ethtool_wolinfo *w); 932 933 /* 934 * ethtool timestamp info 935 */ 936 int (*get_ts_info)(struct dsa_switch *ds, int port, 937 struct ethtool_ts_info *ts); 938 939 /* 940 * DCB ops 941 */ 942 int (*port_get_default_prio)(struct dsa_switch *ds, int port); 943 int (*port_set_default_prio)(struct dsa_switch *ds, int port, 944 u8 prio); 945 int (*port_get_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp); 946 int (*port_add_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp, 947 u8 prio); 948 int (*port_del_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp, 949 u8 prio); 950 951 /* 952 * Suspend and resume 953 */ 954 int (*suspend)(struct dsa_switch *ds); 955 int (*resume)(struct dsa_switch *ds); 956 957 /* 958 * Port enable/disable 959 */ 960 int (*port_enable)(struct dsa_switch *ds, int port, 961 struct phy_device *phy); 962 void (*port_disable)(struct dsa_switch *ds, int port); 963 964 /* 965 * Port's MAC EEE settings 966 */ 967 int (*set_mac_eee)(struct dsa_switch *ds, int port, 968 struct ethtool_eee *e); 969 int (*get_mac_eee)(struct dsa_switch *ds, int port, 970 struct ethtool_eee *e); 971 972 /* EEPROM access */ 973 int (*get_eeprom_len)(struct dsa_switch *ds); 974 int (*get_eeprom)(struct dsa_switch *ds, 975 struct ethtool_eeprom *eeprom, u8 *data); 976 int (*set_eeprom)(struct dsa_switch *ds, 977 struct ethtool_eeprom *eeprom, u8 *data); 978 979 /* 980 * Register access. 981 */ 982 int (*get_regs_len)(struct dsa_switch *ds, int port); 983 void (*get_regs)(struct dsa_switch *ds, int port, 984 struct ethtool_regs *regs, void *p); 985 986 /* 987 * Upper device tracking. 988 */ 989 int (*port_prechangeupper)(struct dsa_switch *ds, int port, 990 struct netdev_notifier_changeupper_info *info); 991 992 /* 993 * Bridge integration 994 */ 995 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 996 int (*port_bridge_join)(struct dsa_switch *ds, int port, 997 struct dsa_bridge bridge, 998 bool *tx_fwd_offload, 999 struct netlink_ext_ack *extack); 1000 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 1001 struct dsa_bridge bridge); 1002 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 1003 u8 state); 1004 int (*port_mst_state_set)(struct dsa_switch *ds, int port, 1005 const struct switchdev_mst_state *state); 1006 void (*port_fast_age)(struct dsa_switch *ds, int port); 1007 int (*port_vlan_fast_age)(struct dsa_switch *ds, int port, u16 vid); 1008 int (*port_pre_bridge_flags)(struct dsa_switch *ds, int port, 1009 struct switchdev_brport_flags flags, 1010 struct netlink_ext_ack *extack); 1011 int (*port_bridge_flags)(struct dsa_switch *ds, int port, 1012 struct switchdev_brport_flags flags, 1013 struct netlink_ext_ack *extack); 1014 void (*port_set_host_flood)(struct dsa_switch *ds, int port, 1015 bool uc, bool mc); 1016 1017 /* 1018 * VLAN support 1019 */ 1020 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 1021 bool vlan_filtering, 1022 struct netlink_ext_ack *extack); 1023 int (*port_vlan_add)(struct dsa_switch *ds, int port, 1024 const struct switchdev_obj_port_vlan *vlan, 1025 struct netlink_ext_ack *extack); 1026 int (*port_vlan_del)(struct dsa_switch *ds, int port, 1027 const struct switchdev_obj_port_vlan *vlan); 1028 int (*vlan_msti_set)(struct dsa_switch *ds, struct dsa_bridge bridge, 1029 const struct switchdev_vlan_msti *msti); 1030 1031 /* 1032 * Forwarding database 1033 */ 1034 int (*port_fdb_add)(struct dsa_switch *ds, int port, 1035 const unsigned char *addr, u16 vid, 1036 struct dsa_db db); 1037 int (*port_fdb_del)(struct dsa_switch *ds, int port, 1038 const unsigned char *addr, u16 vid, 1039 struct dsa_db db); 1040 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 1041 dsa_fdb_dump_cb_t *cb, void *data); 1042 int (*lag_fdb_add)(struct dsa_switch *ds, struct dsa_lag lag, 1043 const unsigned char *addr, u16 vid, 1044 struct dsa_db db); 1045 int (*lag_fdb_del)(struct dsa_switch *ds, struct dsa_lag lag, 1046 const unsigned char *addr, u16 vid, 1047 struct dsa_db db); 1048 1049 /* 1050 * Multicast database 1051 */ 1052 int (*port_mdb_add)(struct dsa_switch *ds, int port, 1053 const struct switchdev_obj_port_mdb *mdb, 1054 struct dsa_db db); 1055 int (*port_mdb_del)(struct dsa_switch *ds, int port, 1056 const struct switchdev_obj_port_mdb *mdb, 1057 struct dsa_db db); 1058 /* 1059 * RXNFC 1060 */ 1061 int (*get_rxnfc)(struct dsa_switch *ds, int port, 1062 struct ethtool_rxnfc *nfc, u32 *rule_locs); 1063 int (*set_rxnfc)(struct dsa_switch *ds, int port, 1064 struct ethtool_rxnfc *nfc); 1065 1066 /* 1067 * TC integration 1068 */ 1069 int (*cls_flower_add)(struct dsa_switch *ds, int port, 1070 struct flow_cls_offload *cls, bool ingress); 1071 int (*cls_flower_del)(struct dsa_switch *ds, int port, 1072 struct flow_cls_offload *cls, bool ingress); 1073 int (*cls_flower_stats)(struct dsa_switch *ds, int port, 1074 struct flow_cls_offload *cls, bool ingress); 1075 int (*port_mirror_add)(struct dsa_switch *ds, int port, 1076 struct dsa_mall_mirror_tc_entry *mirror, 1077 bool ingress, struct netlink_ext_ack *extack); 1078 void (*port_mirror_del)(struct dsa_switch *ds, int port, 1079 struct dsa_mall_mirror_tc_entry *mirror); 1080 int (*port_policer_add)(struct dsa_switch *ds, int port, 1081 struct dsa_mall_policer_tc_entry *policer); 1082 void (*port_policer_del)(struct dsa_switch *ds, int port); 1083 int (*port_setup_tc)(struct dsa_switch *ds, int port, 1084 enum tc_setup_type type, void *type_data); 1085 1086 /* 1087 * Cross-chip operations 1088 */ 1089 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index, 1090 int sw_index, int port, 1091 struct dsa_bridge bridge, 1092 struct netlink_ext_ack *extack); 1093 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index, 1094 int sw_index, int port, 1095 struct dsa_bridge bridge); 1096 int (*crosschip_lag_change)(struct dsa_switch *ds, int sw_index, 1097 int port); 1098 int (*crosschip_lag_join)(struct dsa_switch *ds, int sw_index, 1099 int port, struct dsa_lag lag, 1100 struct netdev_lag_upper_info *info, 1101 struct netlink_ext_ack *extack); 1102 int (*crosschip_lag_leave)(struct dsa_switch *ds, int sw_index, 1103 int port, struct dsa_lag lag); 1104 1105 /* 1106 * PTP functionality 1107 */ 1108 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 1109 struct ifreq *ifr); 1110 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 1111 struct ifreq *ifr); 1112 void (*port_txtstamp)(struct dsa_switch *ds, int port, 1113 struct sk_buff *skb); 1114 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 1115 struct sk_buff *skb, unsigned int type); 1116 1117 /* Devlink parameters, etc */ 1118 int (*devlink_param_get)(struct dsa_switch *ds, u32 id, 1119 struct devlink_param_gset_ctx *ctx); 1120 int (*devlink_param_set)(struct dsa_switch *ds, u32 id, 1121 struct devlink_param_gset_ctx *ctx); 1122 int (*devlink_info_get)(struct dsa_switch *ds, 1123 struct devlink_info_req *req, 1124 struct netlink_ext_ack *extack); 1125 int (*devlink_sb_pool_get)(struct dsa_switch *ds, 1126 unsigned int sb_index, u16 pool_index, 1127 struct devlink_sb_pool_info *pool_info); 1128 int (*devlink_sb_pool_set)(struct dsa_switch *ds, unsigned int sb_index, 1129 u16 pool_index, u32 size, 1130 enum devlink_sb_threshold_type threshold_type, 1131 struct netlink_ext_ack *extack); 1132 int (*devlink_sb_port_pool_get)(struct dsa_switch *ds, int port, 1133 unsigned int sb_index, u16 pool_index, 1134 u32 *p_threshold); 1135 int (*devlink_sb_port_pool_set)(struct dsa_switch *ds, int port, 1136 unsigned int sb_index, u16 pool_index, 1137 u32 threshold, 1138 struct netlink_ext_ack *extack); 1139 int (*devlink_sb_tc_pool_bind_get)(struct dsa_switch *ds, int port, 1140 unsigned int sb_index, u16 tc_index, 1141 enum devlink_sb_pool_type pool_type, 1142 u16 *p_pool_index, u32 *p_threshold); 1143 int (*devlink_sb_tc_pool_bind_set)(struct dsa_switch *ds, int port, 1144 unsigned int sb_index, u16 tc_index, 1145 enum devlink_sb_pool_type pool_type, 1146 u16 pool_index, u32 threshold, 1147 struct netlink_ext_ack *extack); 1148 int (*devlink_sb_occ_snapshot)(struct dsa_switch *ds, 1149 unsigned int sb_index); 1150 int (*devlink_sb_occ_max_clear)(struct dsa_switch *ds, 1151 unsigned int sb_index); 1152 int (*devlink_sb_occ_port_pool_get)(struct dsa_switch *ds, int port, 1153 unsigned int sb_index, u16 pool_index, 1154 u32 *p_cur, u32 *p_max); 1155 int (*devlink_sb_occ_tc_port_bind_get)(struct dsa_switch *ds, int port, 1156 unsigned int sb_index, u16 tc_index, 1157 enum devlink_sb_pool_type pool_type, 1158 u32 *p_cur, u32 *p_max); 1159 1160 /* 1161 * MTU change functionality. Switches can also adjust their MRU through 1162 * this method. By MTU, one understands the SDU (L2 payload) length. 1163 * If the switch needs to account for the DSA tag on the CPU port, this 1164 * method needs to do so privately. 1165 */ 1166 int (*port_change_mtu)(struct dsa_switch *ds, int port, 1167 int new_mtu); 1168 int (*port_max_mtu)(struct dsa_switch *ds, int port); 1169 1170 /* 1171 * LAG integration 1172 */ 1173 int (*port_lag_change)(struct dsa_switch *ds, int port); 1174 int (*port_lag_join)(struct dsa_switch *ds, int port, 1175 struct dsa_lag lag, 1176 struct netdev_lag_upper_info *info, 1177 struct netlink_ext_ack *extack); 1178 int (*port_lag_leave)(struct dsa_switch *ds, int port, 1179 struct dsa_lag lag); 1180 1181 /* 1182 * HSR integration 1183 */ 1184 int (*port_hsr_join)(struct dsa_switch *ds, int port, 1185 struct net_device *hsr); 1186 int (*port_hsr_leave)(struct dsa_switch *ds, int port, 1187 struct net_device *hsr); 1188 1189 /* 1190 * MRP integration 1191 */ 1192 int (*port_mrp_add)(struct dsa_switch *ds, int port, 1193 const struct switchdev_obj_mrp *mrp); 1194 int (*port_mrp_del)(struct dsa_switch *ds, int port, 1195 const struct switchdev_obj_mrp *mrp); 1196 int (*port_mrp_add_ring_role)(struct dsa_switch *ds, int port, 1197 const struct switchdev_obj_ring_role_mrp *mrp); 1198 int (*port_mrp_del_ring_role)(struct dsa_switch *ds, int port, 1199 const struct switchdev_obj_ring_role_mrp *mrp); 1200 1201 /* 1202 * tag_8021q operations 1203 */ 1204 int (*tag_8021q_vlan_add)(struct dsa_switch *ds, int port, u16 vid, 1205 u16 flags); 1206 int (*tag_8021q_vlan_del)(struct dsa_switch *ds, int port, u16 vid); 1207 1208 /* 1209 * DSA master tracking operations 1210 */ 1211 void (*master_state_change)(struct dsa_switch *ds, 1212 const struct net_device *master, 1213 bool operational); 1214 }; 1215 1216 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \ 1217 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \ 1218 dsa_devlink_param_get, dsa_devlink_param_set, NULL) 1219 1220 int dsa_devlink_param_get(struct devlink *dl, u32 id, 1221 struct devlink_param_gset_ctx *ctx); 1222 int dsa_devlink_param_set(struct devlink *dl, u32 id, 1223 struct devlink_param_gset_ctx *ctx); 1224 int dsa_devlink_params_register(struct dsa_switch *ds, 1225 const struct devlink_param *params, 1226 size_t params_count); 1227 void dsa_devlink_params_unregister(struct dsa_switch *ds, 1228 const struct devlink_param *params, 1229 size_t params_count); 1230 int dsa_devlink_resource_register(struct dsa_switch *ds, 1231 const char *resource_name, 1232 u64 resource_size, 1233 u64 resource_id, 1234 u64 parent_resource_id, 1235 const struct devlink_resource_size_params *size_params); 1236 1237 void dsa_devlink_resources_unregister(struct dsa_switch *ds); 1238 1239 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds, 1240 u64 resource_id, 1241 devlink_resource_occ_get_t *occ_get, 1242 void *occ_get_priv); 1243 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds, 1244 u64 resource_id); 1245 struct devlink_region * 1246 dsa_devlink_region_create(struct dsa_switch *ds, 1247 const struct devlink_region_ops *ops, 1248 u32 region_max_snapshots, u64 region_size); 1249 struct devlink_region * 1250 dsa_devlink_port_region_create(struct dsa_switch *ds, 1251 int port, 1252 const struct devlink_port_region_ops *ops, 1253 u32 region_max_snapshots, u64 region_size); 1254 void dsa_devlink_region_destroy(struct devlink_region *region); 1255 1256 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev); 1257 1258 struct dsa_devlink_priv { 1259 struct dsa_switch *ds; 1260 }; 1261 1262 static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl) 1263 { 1264 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 1265 1266 return dl_priv->ds; 1267 } 1268 1269 static inline 1270 struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port) 1271 { 1272 struct devlink *dl = port->devlink; 1273 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 1274 1275 return dl_priv->ds; 1276 } 1277 1278 static inline int dsa_devlink_port_to_port(struct devlink_port *port) 1279 { 1280 return port->index; 1281 } 1282 1283 struct dsa_switch_driver { 1284 struct list_head list; 1285 const struct dsa_switch_ops *ops; 1286 }; 1287 1288 struct net_device *dsa_dev_to_net_device(struct device *dev); 1289 1290 bool dsa_fdb_present_in_other_db(struct dsa_switch *ds, int port, 1291 const unsigned char *addr, u16 vid, 1292 struct dsa_db db); 1293 bool dsa_mdb_present_in_other_db(struct dsa_switch *ds, int port, 1294 const struct switchdev_obj_port_mdb *mdb, 1295 struct dsa_db db); 1296 1297 /* Keep inline for faster access in hot path */ 1298 static inline bool netdev_uses_dsa(const struct net_device *dev) 1299 { 1300 #if IS_ENABLED(CONFIG_NET_DSA) 1301 return dev->dsa_ptr && dev->dsa_ptr->rcv; 1302 #endif 1303 return false; 1304 } 1305 1306 /* All DSA tags that push the EtherType to the right (basically all except tail 1307 * tags, which don't break dissection) can be treated the same from the 1308 * perspective of the flow dissector. 1309 * 1310 * We need to return: 1311 * - offset: the (B - A) difference between: 1312 * A. the position of the real EtherType and 1313 * B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes 1314 * after the normal EtherType was supposed to be) 1315 * The offset in bytes is exactly equal to the tagger overhead (and half of 1316 * that, in __be16 shorts). 1317 * 1318 * - proto: the value of the real EtherType. 1319 */ 1320 static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb, 1321 __be16 *proto, int *offset) 1322 { 1323 #if IS_ENABLED(CONFIG_NET_DSA) 1324 const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops; 1325 int tag_len = ops->needed_headroom; 1326 1327 *offset = tag_len; 1328 *proto = ((__be16 *)skb->data)[(tag_len / 2) - 1]; 1329 #endif 1330 } 1331 1332 #if IS_ENABLED(CONFIG_NET_DSA) 1333 static inline int __dsa_netdevice_ops_check(struct net_device *dev) 1334 { 1335 int err = -EOPNOTSUPP; 1336 1337 if (!dev->dsa_ptr) 1338 return err; 1339 1340 if (!dev->dsa_ptr->netdev_ops) 1341 return err; 1342 1343 return 0; 1344 } 1345 1346 static inline int dsa_ndo_eth_ioctl(struct net_device *dev, struct ifreq *ifr, 1347 int cmd) 1348 { 1349 const struct dsa_netdevice_ops *ops; 1350 int err; 1351 1352 err = __dsa_netdevice_ops_check(dev); 1353 if (err) 1354 return err; 1355 1356 ops = dev->dsa_ptr->netdev_ops; 1357 1358 return ops->ndo_eth_ioctl(dev, ifr, cmd); 1359 } 1360 #else 1361 static inline int dsa_ndo_eth_ioctl(struct net_device *dev, struct ifreq *ifr, 1362 int cmd) 1363 { 1364 return -EOPNOTSUPP; 1365 } 1366 #endif 1367 1368 void dsa_unregister_switch(struct dsa_switch *ds); 1369 int dsa_register_switch(struct dsa_switch *ds); 1370 void dsa_switch_shutdown(struct dsa_switch *ds); 1371 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index); 1372 void dsa_flush_workqueue(void); 1373 #ifdef CONFIG_PM_SLEEP 1374 int dsa_switch_suspend(struct dsa_switch *ds); 1375 int dsa_switch_resume(struct dsa_switch *ds); 1376 #else 1377 static inline int dsa_switch_suspend(struct dsa_switch *ds) 1378 { 1379 return 0; 1380 } 1381 static inline int dsa_switch_resume(struct dsa_switch *ds) 1382 { 1383 return 0; 1384 } 1385 #endif /* CONFIG_PM_SLEEP */ 1386 1387 #if IS_ENABLED(CONFIG_NET_DSA) 1388 bool dsa_slave_dev_check(const struct net_device *dev); 1389 #else 1390 static inline bool dsa_slave_dev_check(const struct net_device *dev) 1391 { 1392 return false; 1393 } 1394 #endif 1395 1396 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 1397 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 1398 1399 #endif 1400