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