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