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