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 46 enum dsa_tag_protocol { 47 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, 48 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, 49 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, 50 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, 51 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, 52 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE, 53 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE, 54 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, 55 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, 56 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, 57 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, 58 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, 59 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, 60 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE, 61 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE, 62 }; 63 64 struct packet_type; 65 struct dsa_switch; 66 67 struct dsa_device_ops { 68 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev); 69 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 70 struct packet_type *pt); 71 int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto, 72 int *offset); 73 /* Used to determine which traffic should match the DSA filter in 74 * eth_type_trans, and which, if any, should bypass it and be processed 75 * as regular on the master net device. 76 */ 77 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 78 unsigned int overhead; 79 const char *name; 80 enum dsa_tag_protocol proto; 81 }; 82 83 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-" 84 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \ 85 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE)) 86 87 struct dsa_skb_cb { 88 struct sk_buff *clone; 89 bool deferred_xmit; 90 }; 91 92 struct __dsa_skb_cb { 93 struct dsa_skb_cb cb; 94 u8 priv[48 - sizeof(struct dsa_skb_cb)]; 95 }; 96 97 #define __DSA_SKB_CB(skb) ((struct __dsa_skb_cb *)((skb)->cb)) 98 99 #define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb)) 100 101 #define DSA_SKB_CB_PRIV(skb) \ 102 ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv)) 103 104 struct dsa_switch_tree { 105 struct list_head list; 106 107 /* Notifier chain for switch-wide events */ 108 struct raw_notifier_head nh; 109 110 /* Tree identifier */ 111 unsigned int index; 112 113 /* Number of switches attached to this tree */ 114 struct kref refcount; 115 116 /* Has this tree been applied to the hardware? */ 117 bool setup; 118 119 /* 120 * Configuration data for the platform device that owns 121 * this dsa switch tree instance. 122 */ 123 struct dsa_platform_data *pd; 124 125 /* 126 * The switch port to which the CPU is attached. 127 */ 128 struct dsa_port *cpu_dp; 129 130 /* 131 * Data for the individual switch chips. 132 */ 133 struct dsa_switch *ds[DSA_MAX_SWITCHES]; 134 }; 135 136 /* TC matchall action types, only mirroring for now */ 137 enum dsa_port_mall_action_type { 138 DSA_PORT_MALL_MIRROR, 139 }; 140 141 /* TC mirroring entry */ 142 struct dsa_mall_mirror_tc_entry { 143 u8 to_local_port; 144 bool ingress; 145 }; 146 147 /* TC matchall entry */ 148 struct dsa_mall_tc_entry { 149 struct list_head list; 150 unsigned long cookie; 151 enum dsa_port_mall_action_type type; 152 union { 153 struct dsa_mall_mirror_tc_entry mirror; 154 }; 155 }; 156 157 158 struct dsa_port { 159 /* A CPU port is physically connected to a master device. 160 * A user port exposed to userspace has a slave device. 161 */ 162 union { 163 struct net_device *master; 164 struct net_device *slave; 165 }; 166 167 /* CPU port tagging operations used by master or slave devices */ 168 const struct dsa_device_ops *tag_ops; 169 170 /* Copies for faster access in master receive hot path */ 171 struct dsa_switch_tree *dst; 172 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 173 struct packet_type *pt); 174 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 175 176 enum { 177 DSA_PORT_TYPE_UNUSED = 0, 178 DSA_PORT_TYPE_CPU, 179 DSA_PORT_TYPE_DSA, 180 DSA_PORT_TYPE_USER, 181 } type; 182 183 struct dsa_switch *ds; 184 unsigned int index; 185 const char *name; 186 struct dsa_port *cpu_dp; 187 const char *mac; 188 struct device_node *dn; 189 unsigned int ageing_time; 190 bool vlan_filtering; 191 u8 stp_state; 192 struct net_device *bridge_dev; 193 struct devlink_port devlink_port; 194 struct phylink *pl; 195 struct phylink_config pl_config; 196 197 struct work_struct xmit_work; 198 struct sk_buff_head xmit_queue; 199 200 /* 201 * Give the switch driver somewhere to hang its per-port private data 202 * structures (accessible from the tagger). 203 */ 204 void *priv; 205 206 /* 207 * Original copy of the master netdev ethtool_ops 208 */ 209 const struct ethtool_ops *orig_ethtool_ops; 210 211 /* 212 * Original copy of the master netdev net_device_ops 213 */ 214 const struct net_device_ops *orig_ndo_ops; 215 }; 216 217 struct dsa_switch { 218 struct device *dev; 219 220 /* 221 * Parent switch tree, and switch index. 222 */ 223 struct dsa_switch_tree *dst; 224 unsigned int index; 225 226 /* Listener for switch fabric events */ 227 struct notifier_block nb; 228 229 /* 230 * Give the switch driver somewhere to hang its private data 231 * structure. 232 */ 233 void *priv; 234 235 /* 236 * Configuration data for this switch. 237 */ 238 struct dsa_chip_data *cd; 239 240 /* 241 * The switch operations. 242 */ 243 const struct dsa_switch_ops *ops; 244 245 /* 246 * An array of which element [a] indicates which port on this 247 * switch should be used to send packets to that are destined 248 * for switch a. Can be NULL if there is only one switch chip. 249 */ 250 s8 rtable[DSA_MAX_SWITCHES]; 251 252 /* 253 * Slave mii_bus and devices for the individual ports. 254 */ 255 u32 phys_mii_mask; 256 struct mii_bus *slave_mii_bus; 257 258 /* Ageing Time limits in msecs */ 259 unsigned int ageing_time_min; 260 unsigned int ageing_time_max; 261 262 /* devlink used to represent this switch device */ 263 struct devlink *devlink; 264 265 /* Number of switch port queues */ 266 unsigned int num_tx_queues; 267 268 /* Disallow bridge core from requesting different VLAN awareness 269 * settings on ports if not hardware-supported 270 */ 271 bool vlan_filtering_is_global; 272 273 /* In case vlan_filtering_is_global is set, the VLAN awareness state 274 * should be retrieved from here and not from the per-port settings. 275 */ 276 bool vlan_filtering; 277 278 unsigned long *bitmap; 279 unsigned long _bitmap; 280 281 /* Dynamically allocated ports, keep last */ 282 size_t num_ports; 283 struct dsa_port ports[]; 284 }; 285 286 static inline const struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 287 { 288 return &ds->ports[p]; 289 } 290 291 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 292 { 293 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 294 } 295 296 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 297 { 298 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 299 } 300 301 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 302 { 303 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 304 } 305 306 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 307 { 308 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 309 } 310 311 static inline u32 dsa_user_ports(struct dsa_switch *ds) 312 { 313 u32 mask = 0; 314 int p; 315 316 for (p = 0; p < ds->num_ports; p++) 317 if (dsa_is_user_port(ds, p)) 318 mask |= BIT(p); 319 320 return mask; 321 } 322 323 /* Return the local port used to reach an arbitrary switch port */ 324 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 325 int port) 326 { 327 if (device == ds->index) 328 return port; 329 else 330 return ds->rtable[device]; 331 } 332 333 /* Return the local port used to reach the dedicated CPU port */ 334 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 335 { 336 const struct dsa_port *dp = dsa_to_port(ds, port); 337 const struct dsa_port *cpu_dp = dp->cpu_dp; 338 339 if (!cpu_dp) 340 return port; 341 342 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 343 } 344 345 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 346 { 347 const struct dsa_switch *ds = dp->ds; 348 349 if (ds->vlan_filtering_is_global) 350 return ds->vlan_filtering; 351 else 352 return dp->vlan_filtering; 353 } 354 355 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 356 bool is_static, void *data); 357 struct dsa_switch_ops { 358 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 359 int port); 360 361 int (*setup)(struct dsa_switch *ds); 362 void (*teardown)(struct dsa_switch *ds); 363 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 364 365 /* 366 * Access to the switch's PHY registers. 367 */ 368 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 369 int (*phy_write)(struct dsa_switch *ds, int port, 370 int regnum, u16 val); 371 372 /* 373 * Link state adjustment (called from libphy) 374 */ 375 void (*adjust_link)(struct dsa_switch *ds, int port, 376 struct phy_device *phydev); 377 void (*fixed_link_update)(struct dsa_switch *ds, int port, 378 struct fixed_phy_status *st); 379 380 /* 381 * PHYLINK integration 382 */ 383 void (*phylink_validate)(struct dsa_switch *ds, int port, 384 unsigned long *supported, 385 struct phylink_link_state *state); 386 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 387 struct phylink_link_state *state); 388 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 389 unsigned int mode, 390 const struct phylink_link_state *state); 391 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 392 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 393 unsigned int mode, 394 phy_interface_t interface); 395 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 396 unsigned int mode, 397 phy_interface_t interface, 398 struct phy_device *phydev); 399 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 400 struct phylink_link_state *state); 401 /* 402 * ethtool hardware statistics. 403 */ 404 void (*get_strings)(struct dsa_switch *ds, int port, 405 u32 stringset, uint8_t *data); 406 void (*get_ethtool_stats)(struct dsa_switch *ds, 407 int port, uint64_t *data); 408 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 409 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 410 int port, uint64_t *data); 411 412 /* 413 * ethtool Wake-on-LAN 414 */ 415 void (*get_wol)(struct dsa_switch *ds, int port, 416 struct ethtool_wolinfo *w); 417 int (*set_wol)(struct dsa_switch *ds, int port, 418 struct ethtool_wolinfo *w); 419 420 /* 421 * ethtool timestamp info 422 */ 423 int (*get_ts_info)(struct dsa_switch *ds, int port, 424 struct ethtool_ts_info *ts); 425 426 /* 427 * Suspend and resume 428 */ 429 int (*suspend)(struct dsa_switch *ds); 430 int (*resume)(struct dsa_switch *ds); 431 432 /* 433 * Port enable/disable 434 */ 435 int (*port_enable)(struct dsa_switch *ds, int port, 436 struct phy_device *phy); 437 void (*port_disable)(struct dsa_switch *ds, int port); 438 439 /* 440 * Port's MAC EEE settings 441 */ 442 int (*set_mac_eee)(struct dsa_switch *ds, int port, 443 struct ethtool_eee *e); 444 int (*get_mac_eee)(struct dsa_switch *ds, int port, 445 struct ethtool_eee *e); 446 447 /* EEPROM access */ 448 int (*get_eeprom_len)(struct dsa_switch *ds); 449 int (*get_eeprom)(struct dsa_switch *ds, 450 struct ethtool_eeprom *eeprom, u8 *data); 451 int (*set_eeprom)(struct dsa_switch *ds, 452 struct ethtool_eeprom *eeprom, u8 *data); 453 454 /* 455 * Register access. 456 */ 457 int (*get_regs_len)(struct dsa_switch *ds, int port); 458 void (*get_regs)(struct dsa_switch *ds, int port, 459 struct ethtool_regs *regs, void *p); 460 461 /* 462 * Bridge integration 463 */ 464 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 465 int (*port_bridge_join)(struct dsa_switch *ds, int port, 466 struct net_device *bridge); 467 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 468 struct net_device *bridge); 469 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 470 u8 state); 471 void (*port_fast_age)(struct dsa_switch *ds, int port); 472 int (*port_egress_floods)(struct dsa_switch *ds, int port, 473 bool unicast, bool multicast); 474 475 /* 476 * VLAN support 477 */ 478 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 479 bool vlan_filtering); 480 int (*port_vlan_prepare)(struct dsa_switch *ds, int port, 481 const struct switchdev_obj_port_vlan *vlan); 482 void (*port_vlan_add)(struct dsa_switch *ds, int port, 483 const struct switchdev_obj_port_vlan *vlan); 484 int (*port_vlan_del)(struct dsa_switch *ds, int port, 485 const struct switchdev_obj_port_vlan *vlan); 486 /* 487 * Forwarding database 488 */ 489 int (*port_fdb_add)(struct dsa_switch *ds, int port, 490 const unsigned char *addr, u16 vid); 491 int (*port_fdb_del)(struct dsa_switch *ds, int port, 492 const unsigned char *addr, u16 vid); 493 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 494 dsa_fdb_dump_cb_t *cb, void *data); 495 496 /* 497 * Multicast database 498 */ 499 int (*port_mdb_prepare)(struct dsa_switch *ds, int port, 500 const struct switchdev_obj_port_mdb *mdb); 501 void (*port_mdb_add)(struct dsa_switch *ds, int port, 502 const struct switchdev_obj_port_mdb *mdb); 503 int (*port_mdb_del)(struct dsa_switch *ds, int port, 504 const struct switchdev_obj_port_mdb *mdb); 505 /* 506 * RXNFC 507 */ 508 int (*get_rxnfc)(struct dsa_switch *ds, int port, 509 struct ethtool_rxnfc *nfc, u32 *rule_locs); 510 int (*set_rxnfc)(struct dsa_switch *ds, int port, 511 struct ethtool_rxnfc *nfc); 512 513 /* 514 * TC integration 515 */ 516 int (*port_mirror_add)(struct dsa_switch *ds, int port, 517 struct dsa_mall_mirror_tc_entry *mirror, 518 bool ingress); 519 void (*port_mirror_del)(struct dsa_switch *ds, int port, 520 struct dsa_mall_mirror_tc_entry *mirror); 521 522 /* 523 * Cross-chip operations 524 */ 525 int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index, 526 int port, struct net_device *br); 527 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index, 528 int port, struct net_device *br); 529 530 /* 531 * PTP functionality 532 */ 533 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 534 struct ifreq *ifr); 535 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 536 struct ifreq *ifr); 537 bool (*port_txtstamp)(struct dsa_switch *ds, int port, 538 struct sk_buff *clone, unsigned int type); 539 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 540 struct sk_buff *skb, unsigned int type); 541 542 /* 543 * Deferred frame Tx 544 */ 545 netdev_tx_t (*port_deferred_xmit)(struct dsa_switch *ds, int port, 546 struct sk_buff *skb); 547 }; 548 549 struct dsa_switch_driver { 550 struct list_head list; 551 const struct dsa_switch_ops *ops; 552 }; 553 554 struct net_device *dsa_dev_to_net_device(struct device *dev); 555 556 /* Keep inline for faster access in hot path */ 557 static inline bool netdev_uses_dsa(struct net_device *dev) 558 { 559 #if IS_ENABLED(CONFIG_NET_DSA) 560 return dev->dsa_ptr && dev->dsa_ptr->rcv; 561 #endif 562 return false; 563 } 564 565 static inline bool dsa_can_decode(const struct sk_buff *skb, 566 struct net_device *dev) 567 { 568 #if IS_ENABLED(CONFIG_NET_DSA) 569 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev); 570 #endif 571 return false; 572 } 573 574 struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n); 575 void dsa_unregister_switch(struct dsa_switch *ds); 576 int dsa_register_switch(struct dsa_switch *ds); 577 #ifdef CONFIG_PM_SLEEP 578 int dsa_switch_suspend(struct dsa_switch *ds); 579 int dsa_switch_resume(struct dsa_switch *ds); 580 #else 581 static inline int dsa_switch_suspend(struct dsa_switch *ds) 582 { 583 return 0; 584 } 585 static inline int dsa_switch_resume(struct dsa_switch *ds) 586 { 587 return 0; 588 } 589 #endif /* CONFIG_PM_SLEEP */ 590 591 enum dsa_notifier_type { 592 DSA_PORT_REGISTER, 593 DSA_PORT_UNREGISTER, 594 }; 595 596 struct dsa_notifier_info { 597 struct net_device *dev; 598 }; 599 600 struct dsa_notifier_register_info { 601 struct dsa_notifier_info info; /* must be first */ 602 struct net_device *master; 603 unsigned int port_number; 604 unsigned int switch_number; 605 }; 606 607 static inline struct net_device * 608 dsa_notifier_info_to_dev(const struct dsa_notifier_info *info) 609 { 610 return info->dev; 611 } 612 613 #if IS_ENABLED(CONFIG_NET_DSA) 614 int register_dsa_notifier(struct notifier_block *nb); 615 int unregister_dsa_notifier(struct notifier_block *nb); 616 int call_dsa_notifiers(unsigned long val, struct net_device *dev, 617 struct dsa_notifier_info *info); 618 #else 619 static inline int register_dsa_notifier(struct notifier_block *nb) 620 { 621 return 0; 622 } 623 624 static inline int unregister_dsa_notifier(struct notifier_block *nb) 625 { 626 return 0; 627 } 628 629 static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev, 630 struct dsa_notifier_info *info) 631 { 632 return NOTIFY_DONE; 633 } 634 #endif 635 636 /* Broadcom tag specific helpers to insert and extract queue/port number */ 637 #define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q) 638 #define BRCM_TAG_GET_PORT(v) ((v) >> 8) 639 #define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff) 640 641 642 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 643 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data); 644 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data); 645 int dsa_port_get_phy_sset_count(struct dsa_port *dp); 646 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 647 648 struct dsa_tag_driver { 649 const struct dsa_device_ops *ops; 650 struct list_head list; 651 struct module *owner; 652 }; 653 654 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 655 unsigned int count, 656 struct module *owner); 657 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 658 unsigned int count); 659 660 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 661 static int __init dsa_tag_driver_module_init(void) \ 662 { \ 663 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 664 THIS_MODULE); \ 665 return 0; \ 666 } \ 667 module_init(dsa_tag_driver_module_init); \ 668 \ 669 static void __exit dsa_tag_driver_module_exit(void) \ 670 { \ 671 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 672 } \ 673 module_exit(dsa_tag_driver_module_exit) 674 675 /** 676 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 677 * drivers 678 * @__ops_array: Array of tag driver strucutres 679 * 680 * Helper macro for DSA tag drivers which do not do anything special 681 * in module init/exit. Each module may only use this macro once, and 682 * calling it replaces module_init() and module_exit(). 683 */ 684 #define module_dsa_tag_drivers(__ops_array) \ 685 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 686 687 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 688 689 /* Create a static structure we can build a linked list of dsa_tag 690 * drivers 691 */ 692 #define DSA_TAG_DRIVER(__ops) \ 693 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 694 .ops = &__ops, \ 695 } 696 697 /** 698 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 699 * driver 700 * @__ops: Single tag driver structures 701 * 702 * Helper macro for DSA tag drivers which do not do anything special 703 * in module init/exit. Each module may only use this macro once, and 704 * calling it replaces module_init() and module_exit(). 705 */ 706 #define module_dsa_tag_driver(__ops) \ 707 DSA_TAG_DRIVER(__ops); \ 708 \ 709 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 710 &DSA_TAG_DRIVER_NAME(__ops) \ 711 }; \ 712 module_dsa_tag_drivers(dsa_tag_driver_array) 713 #endif 714 715