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 /* Valid only on user ports */ 304 u8 cpu_port_in_lag:1; 305 306 u8 setup:1; 307 308 struct device_node *dn; 309 unsigned int ageing_time; 310 311 struct dsa_bridge *bridge; 312 struct devlink_port devlink_port; 313 struct phylink *pl; 314 struct phylink_config pl_config; 315 struct dsa_lag *lag; 316 struct net_device *hsr_dev; 317 318 struct list_head list; 319 320 /* 321 * Original copy of the master netdev ethtool_ops 322 */ 323 const struct ethtool_ops *orig_ethtool_ops; 324 325 /* 326 * Original copy of the master netdev net_device_ops 327 */ 328 const struct dsa_netdevice_ops *netdev_ops; 329 330 /* List of MAC addresses that must be forwarded on this port. 331 * These are only valid on CPU ports and DSA links. 332 */ 333 struct mutex addr_lists_lock; 334 struct list_head fdbs; 335 struct list_head mdbs; 336 337 /* List of VLANs that CPU and DSA ports are members of. */ 338 struct mutex vlans_lock; 339 struct list_head vlans; 340 }; 341 342 /* TODO: ideally DSA ports would have a single dp->link_dp member, 343 * and no dst->rtable nor this struct dsa_link would be needed, 344 * but this would require some more complex tree walking, 345 * so keep it stupid at the moment and list them all. 346 */ 347 struct dsa_link { 348 struct dsa_port *dp; 349 struct dsa_port *link_dp; 350 struct list_head list; 351 }; 352 353 enum dsa_db_type { 354 DSA_DB_PORT, 355 DSA_DB_LAG, 356 DSA_DB_BRIDGE, 357 }; 358 359 struct dsa_db { 360 enum dsa_db_type type; 361 362 union { 363 const struct dsa_port *dp; 364 struct dsa_lag lag; 365 struct dsa_bridge bridge; 366 }; 367 }; 368 369 struct dsa_mac_addr { 370 unsigned char addr[ETH_ALEN]; 371 u16 vid; 372 refcount_t refcount; 373 struct list_head list; 374 struct dsa_db db; 375 }; 376 377 struct dsa_vlan { 378 u16 vid; 379 refcount_t refcount; 380 struct list_head list; 381 }; 382 383 struct dsa_switch { 384 struct device *dev; 385 386 /* 387 * Parent switch tree, and switch index. 388 */ 389 struct dsa_switch_tree *dst; 390 unsigned int index; 391 392 /* Warning: the following bit fields are not atomic, and updating them 393 * can only be done from code paths where concurrency is not possible 394 * (probe time or under rtnl_lock). 395 */ 396 u32 setup:1; 397 398 /* Disallow bridge core from requesting different VLAN awareness 399 * settings on ports if not hardware-supported 400 */ 401 u32 vlan_filtering_is_global:1; 402 403 /* Keep VLAN filtering enabled on ports not offloading any upper */ 404 u32 needs_standalone_vlan_filtering:1; 405 406 /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges 407 * that have vlan_filtering=0. All drivers should ideally set this (and 408 * then the option would get removed), but it is unknown whether this 409 * would break things or not. 410 */ 411 u32 configure_vlan_while_not_filtering:1; 412 413 /* If the switch driver always programs the CPU port as egress tagged 414 * despite the VLAN configuration indicating otherwise, then setting 415 * @untag_bridge_pvid will force the DSA receive path to pop the 416 * bridge's default_pvid VLAN tagged frames to offer a consistent 417 * behavior between a vlan_filtering=0 and vlan_filtering=1 bridge 418 * device. 419 */ 420 u32 untag_bridge_pvid:1; 421 422 /* Let DSA manage the FDB entries towards the 423 * CPU, based on the software bridge database. 424 */ 425 u32 assisted_learning_on_cpu_port:1; 426 427 /* In case vlan_filtering_is_global is set, the VLAN awareness state 428 * should be retrieved from here and not from the per-port settings. 429 */ 430 u32 vlan_filtering:1; 431 432 /* For switches that only have the MRU configurable. To ensure the 433 * configured MTU is not exceeded, normalization of MRU on all bridged 434 * interfaces is needed. 435 */ 436 u32 mtu_enforcement_ingress:1; 437 438 /* Drivers that isolate the FDBs of multiple bridges must set this 439 * to true to receive the bridge as an argument in .port_fdb_{add,del} 440 * and .port_mdb_{add,del}. Otherwise, the bridge.num will always be 441 * passed as zero. 442 */ 443 u32 fdb_isolation:1; 444 445 /* Listener for switch fabric events */ 446 struct notifier_block nb; 447 448 /* 449 * Give the switch driver somewhere to hang its private data 450 * structure. 451 */ 452 void *priv; 453 454 void *tagger_data; 455 456 /* 457 * Configuration data for this switch. 458 */ 459 struct dsa_chip_data *cd; 460 461 /* 462 * The switch operations. 463 */ 464 const struct dsa_switch_ops *ops; 465 466 /* 467 * Slave mii_bus and devices for the individual ports. 468 */ 469 u32 phys_mii_mask; 470 struct mii_bus *slave_mii_bus; 471 472 /* Ageing Time limits in msecs */ 473 unsigned int ageing_time_min; 474 unsigned int ageing_time_max; 475 476 /* Storage for drivers using tag_8021q */ 477 struct dsa_8021q_context *tag_8021q_ctx; 478 479 /* devlink used to represent this switch device */ 480 struct devlink *devlink; 481 482 /* Number of switch port queues */ 483 unsigned int num_tx_queues; 484 485 /* Drivers that benefit from having an ID associated with each 486 * offloaded LAG should set this to the maximum number of 487 * supported IDs. DSA will then maintain a mapping of _at 488 * least_ these many IDs, accessible to drivers via 489 * dsa_lag_id(). 490 */ 491 unsigned int num_lag_ids; 492 493 /* Drivers that support bridge forwarding offload or FDB isolation 494 * should set this to the maximum number of bridges spanning the same 495 * switch tree (or all trees, in the case of cross-tree bridging 496 * support) that can be offloaded. 497 */ 498 unsigned int max_num_bridges; 499 500 unsigned int num_ports; 501 }; 502 503 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 504 { 505 struct dsa_switch_tree *dst = ds->dst; 506 struct dsa_port *dp; 507 508 list_for_each_entry(dp, &dst->ports, list) 509 if (dp->ds == ds && dp->index == p) 510 return dp; 511 512 return NULL; 513 } 514 515 static inline bool dsa_port_is_dsa(struct dsa_port *port) 516 { 517 return port->type == DSA_PORT_TYPE_DSA; 518 } 519 520 static inline bool dsa_port_is_cpu(struct dsa_port *port) 521 { 522 return port->type == DSA_PORT_TYPE_CPU; 523 } 524 525 static inline bool dsa_port_is_user(struct dsa_port *dp) 526 { 527 return dp->type == DSA_PORT_TYPE_USER; 528 } 529 530 static inline bool dsa_port_is_unused(struct dsa_port *dp) 531 { 532 return dp->type == DSA_PORT_TYPE_UNUSED; 533 } 534 535 static inline bool dsa_port_master_is_operational(struct dsa_port *dp) 536 { 537 return dsa_port_is_cpu(dp) && dp->master_admin_up && 538 dp->master_oper_up; 539 } 540 541 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 542 { 543 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 544 } 545 546 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 547 { 548 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 549 } 550 551 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 552 { 553 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 554 } 555 556 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 557 { 558 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 559 } 560 561 #define dsa_tree_for_each_user_port(_dp, _dst) \ 562 list_for_each_entry((_dp), &(_dst)->ports, list) \ 563 if (dsa_port_is_user((_dp))) 564 565 #define dsa_tree_for_each_user_port_continue_reverse(_dp, _dst) \ 566 list_for_each_entry_continue_reverse((_dp), &(_dst)->ports, list) \ 567 if (dsa_port_is_user((_dp))) 568 569 #define dsa_tree_for_each_cpu_port(_dp, _dst) \ 570 list_for_each_entry((_dp), &(_dst)->ports, list) \ 571 if (dsa_port_is_cpu((_dp))) 572 573 #define dsa_switch_for_each_port(_dp, _ds) \ 574 list_for_each_entry((_dp), &(_ds)->dst->ports, list) \ 575 if ((_dp)->ds == (_ds)) 576 577 #define dsa_switch_for_each_port_safe(_dp, _next, _ds) \ 578 list_for_each_entry_safe((_dp), (_next), &(_ds)->dst->ports, list) \ 579 if ((_dp)->ds == (_ds)) 580 581 #define dsa_switch_for_each_port_continue_reverse(_dp, _ds) \ 582 list_for_each_entry_continue_reverse((_dp), &(_ds)->dst->ports, list) \ 583 if ((_dp)->ds == (_ds)) 584 585 #define dsa_switch_for_each_available_port(_dp, _ds) \ 586 dsa_switch_for_each_port((_dp), (_ds)) \ 587 if (!dsa_port_is_unused((_dp))) 588 589 #define dsa_switch_for_each_user_port(_dp, _ds) \ 590 dsa_switch_for_each_port((_dp), (_ds)) \ 591 if (dsa_port_is_user((_dp))) 592 593 #define dsa_switch_for_each_cpu_port(_dp, _ds) \ 594 dsa_switch_for_each_port((_dp), (_ds)) \ 595 if (dsa_port_is_cpu((_dp))) 596 597 #define dsa_switch_for_each_cpu_port_continue_reverse(_dp, _ds) \ 598 dsa_switch_for_each_port_continue_reverse((_dp), (_ds)) \ 599 if (dsa_port_is_cpu((_dp))) 600 601 static inline u32 dsa_user_ports(struct dsa_switch *ds) 602 { 603 struct dsa_port *dp; 604 u32 mask = 0; 605 606 dsa_switch_for_each_user_port(dp, ds) 607 mask |= BIT(dp->index); 608 609 return mask; 610 } 611 612 static inline u32 dsa_cpu_ports(struct dsa_switch *ds) 613 { 614 struct dsa_port *cpu_dp; 615 u32 mask = 0; 616 617 dsa_switch_for_each_cpu_port(cpu_dp, ds) 618 mask |= BIT(cpu_dp->index); 619 620 return mask; 621 } 622 623 /* Return the local port used to reach an arbitrary switch device */ 624 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device) 625 { 626 struct dsa_switch_tree *dst = ds->dst; 627 struct dsa_link *dl; 628 629 list_for_each_entry(dl, &dst->rtable, list) 630 if (dl->dp->ds == ds && dl->link_dp->ds->index == device) 631 return dl->dp->index; 632 633 return ds->num_ports; 634 } 635 636 /* Return the local port used to reach an arbitrary switch port */ 637 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 638 int port) 639 { 640 if (device == ds->index) 641 return port; 642 else 643 return dsa_routing_port(ds, device); 644 } 645 646 /* Return the local port used to reach the dedicated CPU port */ 647 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 648 { 649 const struct dsa_port *dp = dsa_to_port(ds, port); 650 const struct dsa_port *cpu_dp = dp->cpu_dp; 651 652 if (!cpu_dp) 653 return port; 654 655 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 656 } 657 658 /* Return true if this is the local port used to reach the CPU port */ 659 static inline bool dsa_is_upstream_port(struct dsa_switch *ds, int port) 660 { 661 if (dsa_is_unused_port(ds, port)) 662 return false; 663 664 return port == dsa_upstream_port(ds, port); 665 } 666 667 /* Return true if this is a DSA port leading away from the CPU */ 668 static inline bool dsa_is_downstream_port(struct dsa_switch *ds, int port) 669 { 670 return dsa_is_dsa_port(ds, port) && !dsa_is_upstream_port(ds, port); 671 } 672 673 /* Return the local port used to reach the CPU port */ 674 static inline unsigned int dsa_switch_upstream_port(struct dsa_switch *ds) 675 { 676 struct dsa_port *dp; 677 678 dsa_switch_for_each_available_port(dp, ds) { 679 return dsa_upstream_port(ds, dp->index); 680 } 681 682 return ds->num_ports; 683 } 684 685 /* Return true if @upstream_ds is an upstream switch of @downstream_ds, meaning 686 * that the routing port from @downstream_ds to @upstream_ds is also the port 687 * which @downstream_ds uses to reach its dedicated CPU. 688 */ 689 static inline bool dsa_switch_is_upstream_of(struct dsa_switch *upstream_ds, 690 struct dsa_switch *downstream_ds) 691 { 692 int routing_port; 693 694 if (upstream_ds == downstream_ds) 695 return true; 696 697 routing_port = dsa_routing_port(downstream_ds, upstream_ds->index); 698 699 return dsa_is_upstream_port(downstream_ds, routing_port); 700 } 701 702 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 703 { 704 const struct dsa_switch *ds = dp->ds; 705 706 if (ds->vlan_filtering_is_global) 707 return ds->vlan_filtering; 708 else 709 return dp->vlan_filtering; 710 } 711 712 static inline unsigned int dsa_port_lag_id_get(struct dsa_port *dp) 713 { 714 return dp->lag ? dp->lag->id : 0; 715 } 716 717 static inline struct net_device *dsa_port_lag_dev_get(struct dsa_port *dp) 718 { 719 return dp->lag ? dp->lag->dev : NULL; 720 } 721 722 static inline bool dsa_port_offloads_lag(struct dsa_port *dp, 723 const struct dsa_lag *lag) 724 { 725 return dsa_port_lag_dev_get(dp) == lag->dev; 726 } 727 728 static inline struct net_device *dsa_port_to_master(const struct dsa_port *dp) 729 { 730 if (dp->cpu_port_in_lag) 731 return dsa_port_lag_dev_get(dp->cpu_dp); 732 733 return dp->cpu_dp->master; 734 } 735 736 static inline 737 struct net_device *dsa_port_to_bridge_port(const struct dsa_port *dp) 738 { 739 if (!dp->bridge) 740 return NULL; 741 742 if (dp->lag) 743 return dp->lag->dev; 744 else if (dp->hsr_dev) 745 return dp->hsr_dev; 746 747 return dp->slave; 748 } 749 750 static inline struct net_device * 751 dsa_port_bridge_dev_get(const struct dsa_port *dp) 752 { 753 return dp->bridge ? dp->bridge->dev : NULL; 754 } 755 756 static inline unsigned int dsa_port_bridge_num_get(struct dsa_port *dp) 757 { 758 return dp->bridge ? dp->bridge->num : 0; 759 } 760 761 static inline bool dsa_port_bridge_same(const struct dsa_port *a, 762 const struct dsa_port *b) 763 { 764 struct net_device *br_a = dsa_port_bridge_dev_get(a); 765 struct net_device *br_b = dsa_port_bridge_dev_get(b); 766 767 /* Standalone ports are not in the same bridge with one another */ 768 return (!br_a || !br_b) ? false : (br_a == br_b); 769 } 770 771 static inline bool dsa_port_offloads_bridge_port(struct dsa_port *dp, 772 const struct net_device *dev) 773 { 774 return dsa_port_to_bridge_port(dp) == dev; 775 } 776 777 static inline bool 778 dsa_port_offloads_bridge_dev(struct dsa_port *dp, 779 const struct net_device *bridge_dev) 780 { 781 /* DSA ports connected to a bridge, and event was emitted 782 * for the bridge. 783 */ 784 return dsa_port_bridge_dev_get(dp) == bridge_dev; 785 } 786 787 static inline bool dsa_port_offloads_bridge(struct dsa_port *dp, 788 const struct dsa_bridge *bridge) 789 { 790 return dsa_port_bridge_dev_get(dp) == bridge->dev; 791 } 792 793 /* Returns true if any port of this tree offloads the given net_device */ 794 static inline bool dsa_tree_offloads_bridge_port(struct dsa_switch_tree *dst, 795 const struct net_device *dev) 796 { 797 struct dsa_port *dp; 798 799 list_for_each_entry(dp, &dst->ports, list) 800 if (dsa_port_offloads_bridge_port(dp, dev)) 801 return true; 802 803 return false; 804 } 805 806 /* Returns true if any port of this tree offloads the given bridge */ 807 static inline bool 808 dsa_tree_offloads_bridge_dev(struct dsa_switch_tree *dst, 809 const struct net_device *bridge_dev) 810 { 811 struct dsa_port *dp; 812 813 list_for_each_entry(dp, &dst->ports, list) 814 if (dsa_port_offloads_bridge_dev(dp, bridge_dev)) 815 return true; 816 817 return false; 818 } 819 820 static inline bool dsa_port_tree_same(const struct dsa_port *a, 821 const struct dsa_port *b) 822 { 823 return a->ds->dst == b->ds->dst; 824 } 825 826 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 827 bool is_static, void *data); 828 struct dsa_switch_ops { 829 /* 830 * Tagging protocol helpers called for the CPU ports and DSA links. 831 * @get_tag_protocol retrieves the initial tagging protocol and is 832 * mandatory. Switches which can operate using multiple tagging 833 * protocols should implement @change_tag_protocol and report in 834 * @get_tag_protocol the tagger in current use. 835 */ 836 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 837 int port, 838 enum dsa_tag_protocol mprot); 839 int (*change_tag_protocol)(struct dsa_switch *ds, 840 enum dsa_tag_protocol proto); 841 /* 842 * Method for switch drivers to connect to the tagging protocol driver 843 * in current use. The switch driver can provide handlers for certain 844 * types of packets for switch management. 845 */ 846 int (*connect_tag_protocol)(struct dsa_switch *ds, 847 enum dsa_tag_protocol proto); 848 849 int (*port_change_master)(struct dsa_switch *ds, int port, 850 struct net_device *master, 851 struct netlink_ext_ack *extack); 852 853 /* Optional switch-wide initialization and destruction methods */ 854 int (*setup)(struct dsa_switch *ds); 855 void (*teardown)(struct dsa_switch *ds); 856 857 /* Per-port initialization and destruction methods. Mandatory if the 858 * driver registers devlink port regions, optional otherwise. 859 */ 860 int (*port_setup)(struct dsa_switch *ds, int port); 861 void (*port_teardown)(struct dsa_switch *ds, int port); 862 863 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 864 865 /* 866 * Access to the switch's PHY registers. 867 */ 868 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 869 int (*phy_write)(struct dsa_switch *ds, int port, 870 int regnum, u16 val); 871 872 /* 873 * Link state adjustment (called from libphy) 874 */ 875 void (*adjust_link)(struct dsa_switch *ds, int port, 876 struct phy_device *phydev); 877 void (*fixed_link_update)(struct dsa_switch *ds, int port, 878 struct fixed_phy_status *st); 879 880 /* 881 * PHYLINK integration 882 */ 883 void (*phylink_get_caps)(struct dsa_switch *ds, int port, 884 struct phylink_config *config); 885 void (*phylink_validate)(struct dsa_switch *ds, int port, 886 unsigned long *supported, 887 struct phylink_link_state *state); 888 struct phylink_pcs *(*phylink_mac_select_pcs)(struct dsa_switch *ds, 889 int port, 890 phy_interface_t iface); 891 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 892 struct phylink_link_state *state); 893 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 894 unsigned int mode, 895 const struct phylink_link_state *state); 896 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 897 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 898 unsigned int mode, 899 phy_interface_t interface); 900 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 901 unsigned int mode, 902 phy_interface_t interface, 903 struct phy_device *phydev, 904 int speed, int duplex, 905 bool tx_pause, bool rx_pause); 906 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 907 struct phylink_link_state *state); 908 /* 909 * Port statistics counters. 910 */ 911 void (*get_strings)(struct dsa_switch *ds, int port, 912 u32 stringset, uint8_t *data); 913 void (*get_ethtool_stats)(struct dsa_switch *ds, 914 int port, uint64_t *data); 915 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 916 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 917 int port, uint64_t *data); 918 void (*get_eth_phy_stats)(struct dsa_switch *ds, int port, 919 struct ethtool_eth_phy_stats *phy_stats); 920 void (*get_eth_mac_stats)(struct dsa_switch *ds, int port, 921 struct ethtool_eth_mac_stats *mac_stats); 922 void (*get_eth_ctrl_stats)(struct dsa_switch *ds, int port, 923 struct ethtool_eth_ctrl_stats *ctrl_stats); 924 void (*get_rmon_stats)(struct dsa_switch *ds, int port, 925 struct ethtool_rmon_stats *rmon_stats, 926 const struct ethtool_rmon_hist_range **ranges); 927 void (*get_stats64)(struct dsa_switch *ds, int port, 928 struct rtnl_link_stats64 *s); 929 void (*get_pause_stats)(struct dsa_switch *ds, int port, 930 struct ethtool_pause_stats *pause_stats); 931 void (*self_test)(struct dsa_switch *ds, int port, 932 struct ethtool_test *etest, u64 *data); 933 934 /* 935 * ethtool Wake-on-LAN 936 */ 937 void (*get_wol)(struct dsa_switch *ds, int port, 938 struct ethtool_wolinfo *w); 939 int (*set_wol)(struct dsa_switch *ds, int port, 940 struct ethtool_wolinfo *w); 941 942 /* 943 * ethtool timestamp info 944 */ 945 int (*get_ts_info)(struct dsa_switch *ds, int port, 946 struct ethtool_ts_info *ts); 947 948 /* 949 * DCB ops 950 */ 951 int (*port_get_default_prio)(struct dsa_switch *ds, int port); 952 int (*port_set_default_prio)(struct dsa_switch *ds, int port, 953 u8 prio); 954 int (*port_get_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp); 955 int (*port_add_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp, 956 u8 prio); 957 int (*port_del_dscp_prio)(struct dsa_switch *ds, int port, u8 dscp, 958 u8 prio); 959 960 /* 961 * Suspend and resume 962 */ 963 int (*suspend)(struct dsa_switch *ds); 964 int (*resume)(struct dsa_switch *ds); 965 966 /* 967 * Port enable/disable 968 */ 969 int (*port_enable)(struct dsa_switch *ds, int port, 970 struct phy_device *phy); 971 void (*port_disable)(struct dsa_switch *ds, int port); 972 973 /* 974 * Port's MAC EEE settings 975 */ 976 int (*set_mac_eee)(struct dsa_switch *ds, int port, 977 struct ethtool_eee *e); 978 int (*get_mac_eee)(struct dsa_switch *ds, int port, 979 struct ethtool_eee *e); 980 981 /* EEPROM access */ 982 int (*get_eeprom_len)(struct dsa_switch *ds); 983 int (*get_eeprom)(struct dsa_switch *ds, 984 struct ethtool_eeprom *eeprom, u8 *data); 985 int (*set_eeprom)(struct dsa_switch *ds, 986 struct ethtool_eeprom *eeprom, u8 *data); 987 988 /* 989 * Register access. 990 */ 991 int (*get_regs_len)(struct dsa_switch *ds, int port); 992 void (*get_regs)(struct dsa_switch *ds, int port, 993 struct ethtool_regs *regs, void *p); 994 995 /* 996 * Upper device tracking. 997 */ 998 int (*port_prechangeupper)(struct dsa_switch *ds, int port, 999 struct netdev_notifier_changeupper_info *info); 1000 1001 /* 1002 * Bridge integration 1003 */ 1004 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 1005 int (*port_bridge_join)(struct dsa_switch *ds, int port, 1006 struct dsa_bridge bridge, 1007 bool *tx_fwd_offload, 1008 struct netlink_ext_ack *extack); 1009 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 1010 struct dsa_bridge bridge); 1011 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 1012 u8 state); 1013 int (*port_mst_state_set)(struct dsa_switch *ds, int port, 1014 const struct switchdev_mst_state *state); 1015 void (*port_fast_age)(struct dsa_switch *ds, int port); 1016 int (*port_vlan_fast_age)(struct dsa_switch *ds, int port, u16 vid); 1017 int (*port_pre_bridge_flags)(struct dsa_switch *ds, int port, 1018 struct switchdev_brport_flags flags, 1019 struct netlink_ext_ack *extack); 1020 int (*port_bridge_flags)(struct dsa_switch *ds, int port, 1021 struct switchdev_brport_flags flags, 1022 struct netlink_ext_ack *extack); 1023 void (*port_set_host_flood)(struct dsa_switch *ds, int port, 1024 bool uc, bool mc); 1025 1026 /* 1027 * VLAN support 1028 */ 1029 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 1030 bool vlan_filtering, 1031 struct netlink_ext_ack *extack); 1032 int (*port_vlan_add)(struct dsa_switch *ds, int port, 1033 const struct switchdev_obj_port_vlan *vlan, 1034 struct netlink_ext_ack *extack); 1035 int (*port_vlan_del)(struct dsa_switch *ds, int port, 1036 const struct switchdev_obj_port_vlan *vlan); 1037 int (*vlan_msti_set)(struct dsa_switch *ds, struct dsa_bridge bridge, 1038 const struct switchdev_vlan_msti *msti); 1039 1040 /* 1041 * Forwarding database 1042 */ 1043 int (*port_fdb_add)(struct dsa_switch *ds, int port, 1044 const unsigned char *addr, u16 vid, 1045 struct dsa_db db); 1046 int (*port_fdb_del)(struct dsa_switch *ds, int port, 1047 const unsigned char *addr, u16 vid, 1048 struct dsa_db db); 1049 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 1050 dsa_fdb_dump_cb_t *cb, void *data); 1051 int (*lag_fdb_add)(struct dsa_switch *ds, struct dsa_lag lag, 1052 const unsigned char *addr, u16 vid, 1053 struct dsa_db db); 1054 int (*lag_fdb_del)(struct dsa_switch *ds, struct dsa_lag lag, 1055 const unsigned char *addr, u16 vid, 1056 struct dsa_db db); 1057 1058 /* 1059 * Multicast database 1060 */ 1061 int (*port_mdb_add)(struct dsa_switch *ds, int port, 1062 const struct switchdev_obj_port_mdb *mdb, 1063 struct dsa_db db); 1064 int (*port_mdb_del)(struct dsa_switch *ds, int port, 1065 const struct switchdev_obj_port_mdb *mdb, 1066 struct dsa_db db); 1067 /* 1068 * RXNFC 1069 */ 1070 int (*get_rxnfc)(struct dsa_switch *ds, int port, 1071 struct ethtool_rxnfc *nfc, u32 *rule_locs); 1072 int (*set_rxnfc)(struct dsa_switch *ds, int port, 1073 struct ethtool_rxnfc *nfc); 1074 1075 /* 1076 * TC integration 1077 */ 1078 int (*cls_flower_add)(struct dsa_switch *ds, int port, 1079 struct flow_cls_offload *cls, bool ingress); 1080 int (*cls_flower_del)(struct dsa_switch *ds, int port, 1081 struct flow_cls_offload *cls, bool ingress); 1082 int (*cls_flower_stats)(struct dsa_switch *ds, int port, 1083 struct flow_cls_offload *cls, bool ingress); 1084 int (*port_mirror_add)(struct dsa_switch *ds, int port, 1085 struct dsa_mall_mirror_tc_entry *mirror, 1086 bool ingress, struct netlink_ext_ack *extack); 1087 void (*port_mirror_del)(struct dsa_switch *ds, int port, 1088 struct dsa_mall_mirror_tc_entry *mirror); 1089 int (*port_policer_add)(struct dsa_switch *ds, int port, 1090 struct dsa_mall_policer_tc_entry *policer); 1091 void (*port_policer_del)(struct dsa_switch *ds, int port); 1092 int (*port_setup_tc)(struct dsa_switch *ds, int port, 1093 enum tc_setup_type type, void *type_data); 1094 1095 /* 1096 * Cross-chip operations 1097 */ 1098 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index, 1099 int sw_index, int port, 1100 struct dsa_bridge bridge, 1101 struct netlink_ext_ack *extack); 1102 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index, 1103 int sw_index, int port, 1104 struct dsa_bridge bridge); 1105 int (*crosschip_lag_change)(struct dsa_switch *ds, int sw_index, 1106 int port); 1107 int (*crosschip_lag_join)(struct dsa_switch *ds, int sw_index, 1108 int port, struct dsa_lag lag, 1109 struct netdev_lag_upper_info *info, 1110 struct netlink_ext_ack *extack); 1111 int (*crosschip_lag_leave)(struct dsa_switch *ds, int sw_index, 1112 int port, struct dsa_lag lag); 1113 1114 /* 1115 * PTP functionality 1116 */ 1117 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 1118 struct ifreq *ifr); 1119 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 1120 struct ifreq *ifr); 1121 void (*port_txtstamp)(struct dsa_switch *ds, int port, 1122 struct sk_buff *skb); 1123 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 1124 struct sk_buff *skb, unsigned int type); 1125 1126 /* Devlink parameters, etc */ 1127 int (*devlink_param_get)(struct dsa_switch *ds, u32 id, 1128 struct devlink_param_gset_ctx *ctx); 1129 int (*devlink_param_set)(struct dsa_switch *ds, u32 id, 1130 struct devlink_param_gset_ctx *ctx); 1131 int (*devlink_info_get)(struct dsa_switch *ds, 1132 struct devlink_info_req *req, 1133 struct netlink_ext_ack *extack); 1134 int (*devlink_sb_pool_get)(struct dsa_switch *ds, 1135 unsigned int sb_index, u16 pool_index, 1136 struct devlink_sb_pool_info *pool_info); 1137 int (*devlink_sb_pool_set)(struct dsa_switch *ds, unsigned int sb_index, 1138 u16 pool_index, u32 size, 1139 enum devlink_sb_threshold_type threshold_type, 1140 struct netlink_ext_ack *extack); 1141 int (*devlink_sb_port_pool_get)(struct dsa_switch *ds, int port, 1142 unsigned int sb_index, u16 pool_index, 1143 u32 *p_threshold); 1144 int (*devlink_sb_port_pool_set)(struct dsa_switch *ds, int port, 1145 unsigned int sb_index, u16 pool_index, 1146 u32 threshold, 1147 struct netlink_ext_ack *extack); 1148 int (*devlink_sb_tc_pool_bind_get)(struct dsa_switch *ds, int port, 1149 unsigned int sb_index, u16 tc_index, 1150 enum devlink_sb_pool_type pool_type, 1151 u16 *p_pool_index, u32 *p_threshold); 1152 int (*devlink_sb_tc_pool_bind_set)(struct dsa_switch *ds, int port, 1153 unsigned int sb_index, u16 tc_index, 1154 enum devlink_sb_pool_type pool_type, 1155 u16 pool_index, u32 threshold, 1156 struct netlink_ext_ack *extack); 1157 int (*devlink_sb_occ_snapshot)(struct dsa_switch *ds, 1158 unsigned int sb_index); 1159 int (*devlink_sb_occ_max_clear)(struct dsa_switch *ds, 1160 unsigned int sb_index); 1161 int (*devlink_sb_occ_port_pool_get)(struct dsa_switch *ds, int port, 1162 unsigned int sb_index, u16 pool_index, 1163 u32 *p_cur, u32 *p_max); 1164 int (*devlink_sb_occ_tc_port_bind_get)(struct dsa_switch *ds, int port, 1165 unsigned int sb_index, u16 tc_index, 1166 enum devlink_sb_pool_type pool_type, 1167 u32 *p_cur, u32 *p_max); 1168 1169 /* 1170 * MTU change functionality. Switches can also adjust their MRU through 1171 * this method. By MTU, one understands the SDU (L2 payload) length. 1172 * If the switch needs to account for the DSA tag on the CPU port, this 1173 * method needs to do so privately. 1174 */ 1175 int (*port_change_mtu)(struct dsa_switch *ds, int port, 1176 int new_mtu); 1177 int (*port_max_mtu)(struct dsa_switch *ds, int port); 1178 1179 /* 1180 * LAG integration 1181 */ 1182 int (*port_lag_change)(struct dsa_switch *ds, int port); 1183 int (*port_lag_join)(struct dsa_switch *ds, int port, 1184 struct dsa_lag lag, 1185 struct netdev_lag_upper_info *info, 1186 struct netlink_ext_ack *extack); 1187 int (*port_lag_leave)(struct dsa_switch *ds, int port, 1188 struct dsa_lag lag); 1189 1190 /* 1191 * HSR integration 1192 */ 1193 int (*port_hsr_join)(struct dsa_switch *ds, int port, 1194 struct net_device *hsr); 1195 int (*port_hsr_leave)(struct dsa_switch *ds, int port, 1196 struct net_device *hsr); 1197 1198 /* 1199 * MRP integration 1200 */ 1201 int (*port_mrp_add)(struct dsa_switch *ds, int port, 1202 const struct switchdev_obj_mrp *mrp); 1203 int (*port_mrp_del)(struct dsa_switch *ds, int port, 1204 const struct switchdev_obj_mrp *mrp); 1205 int (*port_mrp_add_ring_role)(struct dsa_switch *ds, int port, 1206 const struct switchdev_obj_ring_role_mrp *mrp); 1207 int (*port_mrp_del_ring_role)(struct dsa_switch *ds, int port, 1208 const struct switchdev_obj_ring_role_mrp *mrp); 1209 1210 /* 1211 * tag_8021q operations 1212 */ 1213 int (*tag_8021q_vlan_add)(struct dsa_switch *ds, int port, u16 vid, 1214 u16 flags); 1215 int (*tag_8021q_vlan_del)(struct dsa_switch *ds, int port, u16 vid); 1216 1217 /* 1218 * DSA master tracking operations 1219 */ 1220 void (*master_state_change)(struct dsa_switch *ds, 1221 const struct net_device *master, 1222 bool operational); 1223 }; 1224 1225 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \ 1226 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \ 1227 dsa_devlink_param_get, dsa_devlink_param_set, NULL) 1228 1229 int dsa_devlink_param_get(struct devlink *dl, u32 id, 1230 struct devlink_param_gset_ctx *ctx); 1231 int dsa_devlink_param_set(struct devlink *dl, u32 id, 1232 struct devlink_param_gset_ctx *ctx); 1233 int dsa_devlink_params_register(struct dsa_switch *ds, 1234 const struct devlink_param *params, 1235 size_t params_count); 1236 void dsa_devlink_params_unregister(struct dsa_switch *ds, 1237 const struct devlink_param *params, 1238 size_t params_count); 1239 int dsa_devlink_resource_register(struct dsa_switch *ds, 1240 const char *resource_name, 1241 u64 resource_size, 1242 u64 resource_id, 1243 u64 parent_resource_id, 1244 const struct devlink_resource_size_params *size_params); 1245 1246 void dsa_devlink_resources_unregister(struct dsa_switch *ds); 1247 1248 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds, 1249 u64 resource_id, 1250 devlink_resource_occ_get_t *occ_get, 1251 void *occ_get_priv); 1252 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds, 1253 u64 resource_id); 1254 struct devlink_region * 1255 dsa_devlink_region_create(struct dsa_switch *ds, 1256 const struct devlink_region_ops *ops, 1257 u32 region_max_snapshots, u64 region_size); 1258 struct devlink_region * 1259 dsa_devlink_port_region_create(struct dsa_switch *ds, 1260 int port, 1261 const struct devlink_port_region_ops *ops, 1262 u32 region_max_snapshots, u64 region_size); 1263 void dsa_devlink_region_destroy(struct devlink_region *region); 1264 1265 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev); 1266 1267 struct dsa_devlink_priv { 1268 struct dsa_switch *ds; 1269 }; 1270 1271 static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl) 1272 { 1273 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 1274 1275 return dl_priv->ds; 1276 } 1277 1278 static inline 1279 struct dsa_switch *dsa_devlink_port_to_ds(struct devlink_port *port) 1280 { 1281 struct devlink *dl = port->devlink; 1282 struct dsa_devlink_priv *dl_priv = devlink_priv(dl); 1283 1284 return dl_priv->ds; 1285 } 1286 1287 static inline int dsa_devlink_port_to_port(struct devlink_port *port) 1288 { 1289 return port->index; 1290 } 1291 1292 struct dsa_switch_driver { 1293 struct list_head list; 1294 const struct dsa_switch_ops *ops; 1295 }; 1296 1297 struct net_device *dsa_dev_to_net_device(struct device *dev); 1298 1299 bool dsa_fdb_present_in_other_db(struct dsa_switch *ds, int port, 1300 const unsigned char *addr, u16 vid, 1301 struct dsa_db db); 1302 bool dsa_mdb_present_in_other_db(struct dsa_switch *ds, int port, 1303 const struct switchdev_obj_port_mdb *mdb, 1304 struct dsa_db db); 1305 1306 /* Keep inline for faster access in hot path */ 1307 static inline bool netdev_uses_dsa(const struct net_device *dev) 1308 { 1309 #if IS_ENABLED(CONFIG_NET_DSA) 1310 return dev->dsa_ptr && dev->dsa_ptr->rcv; 1311 #endif 1312 return false; 1313 } 1314 1315 /* All DSA tags that push the EtherType to the right (basically all except tail 1316 * tags, which don't break dissection) can be treated the same from the 1317 * perspective of the flow dissector. 1318 * 1319 * We need to return: 1320 * - offset: the (B - A) difference between: 1321 * A. the position of the real EtherType and 1322 * B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes 1323 * after the normal EtherType was supposed to be) 1324 * The offset in bytes is exactly equal to the tagger overhead (and half of 1325 * that, in __be16 shorts). 1326 * 1327 * - proto: the value of the real EtherType. 1328 */ 1329 static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb, 1330 __be16 *proto, int *offset) 1331 { 1332 #if IS_ENABLED(CONFIG_NET_DSA) 1333 const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops; 1334 int tag_len = ops->needed_headroom; 1335 1336 *offset = tag_len; 1337 *proto = ((__be16 *)skb->data)[(tag_len / 2) - 1]; 1338 #endif 1339 } 1340 1341 #if IS_ENABLED(CONFIG_NET_DSA) 1342 static inline int __dsa_netdevice_ops_check(struct net_device *dev) 1343 { 1344 int err = -EOPNOTSUPP; 1345 1346 if (!dev->dsa_ptr) 1347 return err; 1348 1349 if (!dev->dsa_ptr->netdev_ops) 1350 return err; 1351 1352 return 0; 1353 } 1354 1355 static inline int dsa_ndo_eth_ioctl(struct net_device *dev, struct ifreq *ifr, 1356 int cmd) 1357 { 1358 const struct dsa_netdevice_ops *ops; 1359 int err; 1360 1361 err = __dsa_netdevice_ops_check(dev); 1362 if (err) 1363 return err; 1364 1365 ops = dev->dsa_ptr->netdev_ops; 1366 1367 return ops->ndo_eth_ioctl(dev, ifr, cmd); 1368 } 1369 #else 1370 static inline int dsa_ndo_eth_ioctl(struct net_device *dev, struct ifreq *ifr, 1371 int cmd) 1372 { 1373 return -EOPNOTSUPP; 1374 } 1375 #endif 1376 1377 void dsa_unregister_switch(struct dsa_switch *ds); 1378 int dsa_register_switch(struct dsa_switch *ds); 1379 void dsa_switch_shutdown(struct dsa_switch *ds); 1380 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index); 1381 void dsa_flush_workqueue(void); 1382 #ifdef CONFIG_PM_SLEEP 1383 int dsa_switch_suspend(struct dsa_switch *ds); 1384 int dsa_switch_resume(struct dsa_switch *ds); 1385 #else 1386 static inline int dsa_switch_suspend(struct dsa_switch *ds) 1387 { 1388 return 0; 1389 } 1390 static inline int dsa_switch_resume(struct dsa_switch *ds) 1391 { 1392 return 0; 1393 } 1394 #endif /* CONFIG_PM_SLEEP */ 1395 1396 #if IS_ENABLED(CONFIG_NET_DSA) 1397 bool dsa_slave_dev_check(const struct net_device *dev); 1398 #else 1399 static inline bool dsa_slave_dev_check(const struct net_device *dev) 1400 { 1401 return false; 1402 } 1403 #endif 1404 1405 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 1406 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 1407 1408 struct dsa_tag_driver { 1409 const struct dsa_device_ops *ops; 1410 struct list_head list; 1411 struct module *owner; 1412 }; 1413 1414 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 1415 unsigned int count, 1416 struct module *owner); 1417 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 1418 unsigned int count); 1419 1420 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 1421 static int __init dsa_tag_driver_module_init(void) \ 1422 { \ 1423 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 1424 THIS_MODULE); \ 1425 return 0; \ 1426 } \ 1427 module_init(dsa_tag_driver_module_init); \ 1428 \ 1429 static void __exit dsa_tag_driver_module_exit(void) \ 1430 { \ 1431 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 1432 } \ 1433 module_exit(dsa_tag_driver_module_exit) 1434 1435 /** 1436 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 1437 * drivers 1438 * @__ops_array: Array of tag driver structures 1439 * 1440 * Helper macro for DSA tag drivers which do not do anything special 1441 * in module init/exit. Each module may only use this macro once, and 1442 * calling it replaces module_init() and module_exit(). 1443 */ 1444 #define module_dsa_tag_drivers(__ops_array) \ 1445 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 1446 1447 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 1448 1449 /* Create a static structure we can build a linked list of dsa_tag 1450 * drivers 1451 */ 1452 #define DSA_TAG_DRIVER(__ops) \ 1453 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 1454 .ops = &__ops, \ 1455 } 1456 1457 /** 1458 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 1459 * driver 1460 * @__ops: Single tag driver structures 1461 * 1462 * Helper macro for DSA tag drivers which do not do anything special 1463 * in module init/exit. Each module may only use this macro once, and 1464 * calling it replaces module_init() and module_exit(). 1465 */ 1466 #define module_dsa_tag_driver(__ops) \ 1467 DSA_TAG_DRIVER(__ops); \ 1468 \ 1469 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 1470 &DSA_TAG_DRIVER_NAME(__ops) \ 1471 }; \ 1472 module_dsa_tag_drivers(dsa_tag_driver_array) 1473 #endif 1474 1475