1 /* 2 * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips 3 * Copyright (c) 2008-2009 Marvell Semiconductor 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 */ 10 11 #ifndef __LINUX_NET_DSA_H 12 #define __LINUX_NET_DSA_H 13 14 #include <linux/if.h> 15 #include <linux/if_ether.h> 16 #include <linux/list.h> 17 #include <linux/notifier.h> 18 #include <linux/timer.h> 19 #include <linux/workqueue.h> 20 #include <linux/of.h> 21 #include <linux/ethtool.h> 22 #include <linux/net_tstamp.h> 23 #include <linux/phy.h> 24 #include <linux/platform_data/dsa.h> 25 #include <linux/phylink.h> 26 #include <net/devlink.h> 27 #include <net/switchdev.h> 28 29 struct tc_action; 30 struct phy_device; 31 struct fixed_phy_status; 32 struct phylink_link_state; 33 34 #define DSA_TAG_PROTO_NONE_VALUE 0 35 #define DSA_TAG_PROTO_BRCM_VALUE 1 36 #define DSA_TAG_PROTO_BRCM_PREPEND_VALUE 2 37 #define DSA_TAG_PROTO_DSA_VALUE 3 38 #define DSA_TAG_PROTO_EDSA_VALUE 4 39 #define DSA_TAG_PROTO_GSWIP_VALUE 5 40 #define DSA_TAG_PROTO_KSZ9477_VALUE 6 41 #define DSA_TAG_PROTO_KSZ9893_VALUE 7 42 #define DSA_TAG_PROTO_LAN9303_VALUE 8 43 #define DSA_TAG_PROTO_MTK_VALUE 9 44 #define DSA_TAG_PROTO_QCA_VALUE 10 45 #define DSA_TAG_PROTO_TRAILER_VALUE 11 46 #define DSA_TAG_PROTO_8021Q_VALUE 12 47 #define DSA_TAG_PROTO_SJA1105_VALUE 13 48 49 enum dsa_tag_protocol { 50 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, 51 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, 52 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, 53 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, 54 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, 55 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE, 56 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE, 57 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, 58 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, 59 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, 60 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, 61 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, 62 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, 63 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE, 64 }; 65 66 struct packet_type; 67 struct dsa_switch; 68 69 struct dsa_device_ops { 70 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev); 71 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 72 struct packet_type *pt); 73 int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto, 74 int *offset); 75 /* Used to determine which traffic should match the DSA filter in 76 * eth_type_trans, and which, if any, should bypass it and be processed 77 * as regular on the master net device. 78 */ 79 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 80 unsigned int overhead; 81 const char *name; 82 enum dsa_tag_protocol proto; 83 }; 84 85 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-" 86 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \ 87 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE)) 88 89 struct dsa_skb_cb { 90 struct sk_buff *clone; 91 bool deferred_xmit; 92 }; 93 94 struct __dsa_skb_cb { 95 struct dsa_skb_cb cb; 96 u8 priv[48 - sizeof(struct dsa_skb_cb)]; 97 }; 98 99 #define __DSA_SKB_CB(skb) ((struct __dsa_skb_cb *)((skb)->cb)) 100 101 #define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb)) 102 103 #define DSA_SKB_CB_PRIV(skb) \ 104 ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv)) 105 106 struct dsa_switch_tree { 107 struct list_head list; 108 109 /* Notifier chain for switch-wide events */ 110 struct raw_notifier_head nh; 111 112 /* Tree identifier */ 113 unsigned int index; 114 115 /* Number of switches attached to this tree */ 116 struct kref refcount; 117 118 /* Has this tree been applied to the hardware? */ 119 bool setup; 120 121 /* 122 * Configuration data for the platform device that owns 123 * this dsa switch tree instance. 124 */ 125 struct dsa_platform_data *pd; 126 127 /* 128 * The switch port to which the CPU is attached. 129 */ 130 struct dsa_port *cpu_dp; 131 132 /* 133 * Data for the individual switch chips. 134 */ 135 struct dsa_switch *ds[DSA_MAX_SWITCHES]; 136 }; 137 138 /* TC matchall action types, only mirroring for now */ 139 enum dsa_port_mall_action_type { 140 DSA_PORT_MALL_MIRROR, 141 }; 142 143 /* TC mirroring entry */ 144 struct dsa_mall_mirror_tc_entry { 145 u8 to_local_port; 146 bool ingress; 147 }; 148 149 /* TC matchall entry */ 150 struct dsa_mall_tc_entry { 151 struct list_head list; 152 unsigned long cookie; 153 enum dsa_port_mall_action_type type; 154 union { 155 struct dsa_mall_mirror_tc_entry mirror; 156 }; 157 }; 158 159 160 struct dsa_port { 161 /* A CPU port is physically connected to a master device. 162 * A user port exposed to userspace has a slave device. 163 */ 164 union { 165 struct net_device *master; 166 struct net_device *slave; 167 }; 168 169 /* CPU port tagging operations used by master or slave devices */ 170 const struct dsa_device_ops *tag_ops; 171 172 /* Copies for faster access in master receive hot path */ 173 struct dsa_switch_tree *dst; 174 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 175 struct packet_type *pt); 176 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 177 178 enum { 179 DSA_PORT_TYPE_UNUSED = 0, 180 DSA_PORT_TYPE_CPU, 181 DSA_PORT_TYPE_DSA, 182 DSA_PORT_TYPE_USER, 183 } type; 184 185 struct dsa_switch *ds; 186 unsigned int index; 187 const char *name; 188 const struct dsa_port *cpu_dp; 189 const char *mac; 190 struct device_node *dn; 191 unsigned int ageing_time; 192 bool vlan_filtering; 193 u8 stp_state; 194 struct net_device *bridge_dev; 195 struct devlink_port devlink_port; 196 struct phylink *pl; 197 struct phylink_config pl_config; 198 199 struct work_struct xmit_work; 200 struct sk_buff_head xmit_queue; 201 202 /* 203 * Give the switch driver somewhere to hang its per-port private data 204 * structures (accessible from the tagger). 205 */ 206 void *priv; 207 208 /* 209 * Original copy of the master netdev ethtool_ops 210 */ 211 const struct ethtool_ops *orig_ethtool_ops; 212 213 /* 214 * Original copy of the master netdev net_device_ops 215 */ 216 const struct net_device_ops *orig_ndo_ops; 217 }; 218 219 struct dsa_switch { 220 struct device *dev; 221 222 /* 223 * Parent switch tree, and switch index. 224 */ 225 struct dsa_switch_tree *dst; 226 unsigned int index; 227 228 /* Listener for switch fabric events */ 229 struct notifier_block nb; 230 231 /* 232 * Give the switch driver somewhere to hang its private data 233 * structure. 234 */ 235 void *priv; 236 237 /* 238 * Configuration data for this switch. 239 */ 240 struct dsa_chip_data *cd; 241 242 /* 243 * The switch operations. 244 */ 245 const struct dsa_switch_ops *ops; 246 247 /* 248 * An array of which element [a] indicates which port on this 249 * switch should be used to send packets to that are destined 250 * for switch a. Can be NULL if there is only one switch chip. 251 */ 252 s8 rtable[DSA_MAX_SWITCHES]; 253 254 /* 255 * Slave mii_bus and devices for the individual ports. 256 */ 257 u32 phys_mii_mask; 258 struct mii_bus *slave_mii_bus; 259 260 /* Ageing Time limits in msecs */ 261 unsigned int ageing_time_min; 262 unsigned int ageing_time_max; 263 264 /* devlink used to represent this switch device */ 265 struct devlink *devlink; 266 267 /* Number of switch port queues */ 268 unsigned int num_tx_queues; 269 270 /* Disallow bridge core from requesting different VLAN awareness 271 * settings on ports if not hardware-supported 272 */ 273 bool vlan_filtering_is_global; 274 275 /* In case vlan_filtering_is_global is set, the VLAN awareness state 276 * should be retrieved from here and not from the per-port settings. 277 */ 278 bool vlan_filtering; 279 280 unsigned long *bitmap; 281 unsigned long _bitmap; 282 283 /* Dynamically allocated ports, keep last */ 284 size_t num_ports; 285 struct dsa_port ports[]; 286 }; 287 288 static inline const struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 289 { 290 return &ds->ports[p]; 291 } 292 293 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 294 { 295 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 296 } 297 298 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 299 { 300 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 301 } 302 303 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 304 { 305 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 306 } 307 308 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 309 { 310 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 311 } 312 313 static inline u32 dsa_user_ports(struct dsa_switch *ds) 314 { 315 u32 mask = 0; 316 int p; 317 318 for (p = 0; p < ds->num_ports; p++) 319 if (dsa_is_user_port(ds, p)) 320 mask |= BIT(p); 321 322 return mask; 323 } 324 325 /* Return the local port used to reach an arbitrary switch port */ 326 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 327 int port) 328 { 329 if (device == ds->index) 330 return port; 331 else 332 return ds->rtable[device]; 333 } 334 335 /* Return the local port used to reach the dedicated CPU port */ 336 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 337 { 338 const struct dsa_port *dp = dsa_to_port(ds, port); 339 const struct dsa_port *cpu_dp = dp->cpu_dp; 340 341 if (!cpu_dp) 342 return port; 343 344 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 345 } 346 347 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 348 { 349 const struct dsa_switch *ds = dp->ds; 350 351 if (ds->vlan_filtering_is_global) 352 return ds->vlan_filtering; 353 else 354 return dp->vlan_filtering; 355 } 356 357 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 358 bool is_static, void *data); 359 struct dsa_switch_ops { 360 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 361 int port); 362 363 int (*setup)(struct dsa_switch *ds); 364 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 365 366 /* 367 * Access to the switch's PHY registers. 368 */ 369 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 370 int (*phy_write)(struct dsa_switch *ds, int port, 371 int regnum, u16 val); 372 373 /* 374 * Link state adjustment (called from libphy) 375 */ 376 void (*adjust_link)(struct dsa_switch *ds, int port, 377 struct phy_device *phydev); 378 void (*fixed_link_update)(struct dsa_switch *ds, int port, 379 struct fixed_phy_status *st); 380 381 /* 382 * PHYLINK integration 383 */ 384 void (*phylink_validate)(struct dsa_switch *ds, int port, 385 unsigned long *supported, 386 struct phylink_link_state *state); 387 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 388 struct phylink_link_state *state); 389 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 390 unsigned int mode, 391 const struct phylink_link_state *state); 392 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 393 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 394 unsigned int mode, 395 phy_interface_t interface); 396 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 397 unsigned int mode, 398 phy_interface_t interface, 399 struct phy_device *phydev); 400 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 401 struct phylink_link_state *state); 402 /* 403 * ethtool hardware statistics. 404 */ 405 void (*get_strings)(struct dsa_switch *ds, int port, 406 u32 stringset, uint8_t *data); 407 void (*get_ethtool_stats)(struct dsa_switch *ds, 408 int port, uint64_t *data); 409 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 410 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 411 int port, uint64_t *data); 412 413 /* 414 * ethtool Wake-on-LAN 415 */ 416 void (*get_wol)(struct dsa_switch *ds, int port, 417 struct ethtool_wolinfo *w); 418 int (*set_wol)(struct dsa_switch *ds, int port, 419 struct ethtool_wolinfo *w); 420 421 /* 422 * ethtool timestamp info 423 */ 424 int (*get_ts_info)(struct dsa_switch *ds, int port, 425 struct ethtool_ts_info *ts); 426 427 /* 428 * Suspend and resume 429 */ 430 int (*suspend)(struct dsa_switch *ds); 431 int (*resume)(struct dsa_switch *ds); 432 433 /* 434 * Port enable/disable 435 */ 436 int (*port_enable)(struct dsa_switch *ds, int port, 437 struct phy_device *phy); 438 void (*port_disable)(struct dsa_switch *ds, int port); 439 440 /* 441 * Port's MAC EEE settings 442 */ 443 int (*set_mac_eee)(struct dsa_switch *ds, int port, 444 struct ethtool_eee *e); 445 int (*get_mac_eee)(struct dsa_switch *ds, int port, 446 struct ethtool_eee *e); 447 448 /* EEPROM access */ 449 int (*get_eeprom_len)(struct dsa_switch *ds); 450 int (*get_eeprom)(struct dsa_switch *ds, 451 struct ethtool_eeprom *eeprom, u8 *data); 452 int (*set_eeprom)(struct dsa_switch *ds, 453 struct ethtool_eeprom *eeprom, u8 *data); 454 455 /* 456 * Register access. 457 */ 458 int (*get_regs_len)(struct dsa_switch *ds, int port); 459 void (*get_regs)(struct dsa_switch *ds, int port, 460 struct ethtool_regs *regs, void *p); 461 462 /* 463 * Bridge integration 464 */ 465 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 466 int (*port_bridge_join)(struct dsa_switch *ds, int port, 467 struct net_device *bridge); 468 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 469 struct net_device *bridge); 470 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 471 u8 state); 472 void (*port_fast_age)(struct dsa_switch *ds, int port); 473 int (*port_egress_floods)(struct dsa_switch *ds, int port, 474 bool unicast, bool multicast); 475 476 /* 477 * VLAN support 478 */ 479 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 480 bool vlan_filtering); 481 int (*port_vlan_prepare)(struct dsa_switch *ds, int port, 482 const struct switchdev_obj_port_vlan *vlan); 483 void (*port_vlan_add)(struct dsa_switch *ds, int port, 484 const struct switchdev_obj_port_vlan *vlan); 485 int (*port_vlan_del)(struct dsa_switch *ds, int port, 486 const struct switchdev_obj_port_vlan *vlan); 487 /* 488 * Forwarding database 489 */ 490 int (*port_fdb_add)(struct dsa_switch *ds, int port, 491 const unsigned char *addr, u16 vid); 492 int (*port_fdb_del)(struct dsa_switch *ds, int port, 493 const unsigned char *addr, u16 vid); 494 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 495 dsa_fdb_dump_cb_t *cb, void *data); 496 497 /* 498 * Multicast database 499 */ 500 int (*port_mdb_prepare)(struct dsa_switch *ds, int port, 501 const struct switchdev_obj_port_mdb *mdb); 502 void (*port_mdb_add)(struct dsa_switch *ds, int port, 503 const struct switchdev_obj_port_mdb *mdb); 504 int (*port_mdb_del)(struct dsa_switch *ds, int port, 505 const struct switchdev_obj_port_mdb *mdb); 506 /* 507 * RXNFC 508 */ 509 int (*get_rxnfc)(struct dsa_switch *ds, int port, 510 struct ethtool_rxnfc *nfc, u32 *rule_locs); 511 int (*set_rxnfc)(struct dsa_switch *ds, int port, 512 struct ethtool_rxnfc *nfc); 513 514 /* 515 * TC integration 516 */ 517 int (*port_mirror_add)(struct dsa_switch *ds, int port, 518 struct dsa_mall_mirror_tc_entry *mirror, 519 bool ingress); 520 void (*port_mirror_del)(struct dsa_switch *ds, int port, 521 struct dsa_mall_mirror_tc_entry *mirror); 522 523 /* 524 * Cross-chip operations 525 */ 526 int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index, 527 int port, struct net_device *br); 528 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index, 529 int port, struct net_device *br); 530 531 /* 532 * PTP functionality 533 */ 534 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 535 struct ifreq *ifr); 536 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 537 struct ifreq *ifr); 538 bool (*port_txtstamp)(struct dsa_switch *ds, int port, 539 struct sk_buff *clone, unsigned int type); 540 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 541 struct sk_buff *skb, unsigned int type); 542 543 /* 544 * Deferred frame Tx 545 */ 546 netdev_tx_t (*port_deferred_xmit)(struct dsa_switch *ds, int port, 547 struct sk_buff *skb); 548 }; 549 550 struct dsa_switch_driver { 551 struct list_head list; 552 const struct dsa_switch_ops *ops; 553 }; 554 555 struct net_device *dsa_dev_to_net_device(struct device *dev); 556 557 /* Keep inline for faster access in hot path */ 558 static inline bool netdev_uses_dsa(struct net_device *dev) 559 { 560 #if IS_ENABLED(CONFIG_NET_DSA) 561 return dev->dsa_ptr && dev->dsa_ptr->rcv; 562 #endif 563 return false; 564 } 565 566 static inline bool dsa_can_decode(const struct sk_buff *skb, 567 struct net_device *dev) 568 { 569 #if IS_ENABLED(CONFIG_NET_DSA) 570 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev); 571 #endif 572 return false; 573 } 574 575 struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n); 576 void dsa_unregister_switch(struct dsa_switch *ds); 577 int dsa_register_switch(struct dsa_switch *ds); 578 #ifdef CONFIG_PM_SLEEP 579 int dsa_switch_suspend(struct dsa_switch *ds); 580 int dsa_switch_resume(struct dsa_switch *ds); 581 #else 582 static inline int dsa_switch_suspend(struct dsa_switch *ds) 583 { 584 return 0; 585 } 586 static inline int dsa_switch_resume(struct dsa_switch *ds) 587 { 588 return 0; 589 } 590 #endif /* CONFIG_PM_SLEEP */ 591 592 enum dsa_notifier_type { 593 DSA_PORT_REGISTER, 594 DSA_PORT_UNREGISTER, 595 }; 596 597 struct dsa_notifier_info { 598 struct net_device *dev; 599 }; 600 601 struct dsa_notifier_register_info { 602 struct dsa_notifier_info info; /* must be first */ 603 struct net_device *master; 604 unsigned int port_number; 605 unsigned int switch_number; 606 }; 607 608 static inline struct net_device * 609 dsa_notifier_info_to_dev(const struct dsa_notifier_info *info) 610 { 611 return info->dev; 612 } 613 614 #if IS_ENABLED(CONFIG_NET_DSA) 615 int register_dsa_notifier(struct notifier_block *nb); 616 int unregister_dsa_notifier(struct notifier_block *nb); 617 int call_dsa_notifiers(unsigned long val, struct net_device *dev, 618 struct dsa_notifier_info *info); 619 #else 620 static inline int register_dsa_notifier(struct notifier_block *nb) 621 { 622 return 0; 623 } 624 625 static inline int unregister_dsa_notifier(struct notifier_block *nb) 626 { 627 return 0; 628 } 629 630 static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev, 631 struct dsa_notifier_info *info) 632 { 633 return NOTIFY_DONE; 634 } 635 #endif 636 637 /* Broadcom tag specific helpers to insert and extract queue/port number */ 638 #define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q) 639 #define BRCM_TAG_GET_PORT(v) ((v) >> 8) 640 #define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff) 641 642 643 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 644 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data); 645 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data); 646 int dsa_port_get_phy_sset_count(struct dsa_port *dp); 647 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 648 649 struct dsa_tag_driver { 650 const struct dsa_device_ops *ops; 651 struct list_head list; 652 struct module *owner; 653 }; 654 655 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 656 unsigned int count, 657 struct module *owner); 658 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 659 unsigned int count); 660 661 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 662 static int __init dsa_tag_driver_module_init(void) \ 663 { \ 664 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 665 THIS_MODULE); \ 666 return 0; \ 667 } \ 668 module_init(dsa_tag_driver_module_init); \ 669 \ 670 static void __exit dsa_tag_driver_module_exit(void) \ 671 { \ 672 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 673 } \ 674 module_exit(dsa_tag_driver_module_exit) 675 676 /** 677 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 678 * drivers 679 * @__ops_array: Array of tag driver strucutres 680 * 681 * Helper macro for DSA tag drivers which do not do anything special 682 * in module init/exit. Each module may only use this macro once, and 683 * calling it replaces module_init() and module_exit(). 684 */ 685 #define module_dsa_tag_drivers(__ops_array) \ 686 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 687 688 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 689 690 /* Create a static structure we can build a linked list of dsa_tag 691 * drivers 692 */ 693 #define DSA_TAG_DRIVER(__ops) \ 694 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 695 .ops = &__ops, \ 696 } 697 698 /** 699 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 700 * driver 701 * @__ops: Single tag driver structures 702 * 703 * Helper macro for DSA tag drivers which do not do anything special 704 * in module init/exit. Each module may only use this macro once, and 705 * calling it replaces module_init() and module_exit(). 706 */ 707 #define module_dsa_tag_driver(__ops) \ 708 DSA_TAG_DRIVER(__ops); \ 709 \ 710 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 711 &DSA_TAG_DRIVER_NAME(__ops) \ 712 }; \ 713 module_dsa_tag_drivers(dsa_tag_driver_array) 714 #endif 715 716