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 <net/devlink.h> 22 #include <net/switchdev.h> 23 24 struct tc_action; 25 struct phy_device; 26 struct fixed_phy_status; 27 struct phylink_link_state; 28 29 #define DSA_TAG_PROTO_NONE_VALUE 0 30 #define DSA_TAG_PROTO_BRCM_VALUE 1 31 #define DSA_TAG_PROTO_BRCM_PREPEND_VALUE 2 32 #define DSA_TAG_PROTO_DSA_VALUE 3 33 #define DSA_TAG_PROTO_EDSA_VALUE 4 34 #define DSA_TAG_PROTO_GSWIP_VALUE 5 35 #define DSA_TAG_PROTO_KSZ9477_VALUE 6 36 #define DSA_TAG_PROTO_KSZ9893_VALUE 7 37 #define DSA_TAG_PROTO_LAN9303_VALUE 8 38 #define DSA_TAG_PROTO_MTK_VALUE 9 39 #define DSA_TAG_PROTO_QCA_VALUE 10 40 #define DSA_TAG_PROTO_TRAILER_VALUE 11 41 #define DSA_TAG_PROTO_8021Q_VALUE 12 42 #define DSA_TAG_PROTO_SJA1105_VALUE 13 43 44 enum dsa_tag_protocol { 45 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, 46 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, 47 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, 48 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, 49 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, 50 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE, 51 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE, 52 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, 53 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, 54 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, 55 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, 56 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, 57 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, 58 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE, 59 }; 60 61 struct packet_type; 62 struct dsa_switch; 63 64 struct dsa_device_ops { 65 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev); 66 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 67 struct packet_type *pt); 68 int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto, 69 int *offset); 70 /* Used to determine which traffic should match the DSA filter in 71 * eth_type_trans, and which, if any, should bypass it and be processed 72 * as regular on the master net device. 73 */ 74 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 75 unsigned int overhead; 76 const char *name; 77 enum dsa_tag_protocol proto; 78 }; 79 80 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-" 81 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \ 82 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE)) 83 84 struct dsa_skb_cb { 85 struct sk_buff *clone; 86 bool deferred_xmit; 87 }; 88 89 struct __dsa_skb_cb { 90 struct dsa_skb_cb cb; 91 u8 priv[48 - sizeof(struct dsa_skb_cb)]; 92 }; 93 94 #define __DSA_SKB_CB(skb) ((struct __dsa_skb_cb *)((skb)->cb)) 95 96 #define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb)) 97 98 #define DSA_SKB_CB_PRIV(skb) \ 99 ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv)) 100 101 struct dsa_switch_tree { 102 struct list_head list; 103 104 /* Notifier chain for switch-wide events */ 105 struct raw_notifier_head nh; 106 107 /* Tree identifier */ 108 unsigned int index; 109 110 /* Number of switches attached to this tree */ 111 struct kref refcount; 112 113 /* Has this tree been applied to the hardware? */ 114 bool setup; 115 116 /* 117 * Configuration data for the platform device that owns 118 * this dsa switch tree instance. 119 */ 120 struct dsa_platform_data *pd; 121 122 /* 123 * The switch port to which the CPU is attached. 124 */ 125 struct dsa_port *cpu_dp; 126 127 /* 128 * Data for the individual switch chips. 129 */ 130 struct dsa_switch *ds[DSA_MAX_SWITCHES]; 131 }; 132 133 /* TC matchall action types, only mirroring for now */ 134 enum dsa_port_mall_action_type { 135 DSA_PORT_MALL_MIRROR, 136 }; 137 138 /* TC mirroring entry */ 139 struct dsa_mall_mirror_tc_entry { 140 u8 to_local_port; 141 bool ingress; 142 }; 143 144 /* TC matchall entry */ 145 struct dsa_mall_tc_entry { 146 struct list_head list; 147 unsigned long cookie; 148 enum dsa_port_mall_action_type type; 149 union { 150 struct dsa_mall_mirror_tc_entry mirror; 151 }; 152 }; 153 154 155 struct dsa_port { 156 /* A CPU port is physically connected to a master device. 157 * A user port exposed to userspace has a slave device. 158 */ 159 union { 160 struct net_device *master; 161 struct net_device *slave; 162 }; 163 164 /* CPU port tagging operations used by master or slave devices */ 165 const struct dsa_device_ops *tag_ops; 166 167 /* Copies for faster access in master receive hot path */ 168 struct dsa_switch_tree *dst; 169 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 170 struct packet_type *pt); 171 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 172 173 enum { 174 DSA_PORT_TYPE_UNUSED = 0, 175 DSA_PORT_TYPE_CPU, 176 DSA_PORT_TYPE_DSA, 177 DSA_PORT_TYPE_USER, 178 } type; 179 180 struct dsa_switch *ds; 181 unsigned int index; 182 const char *name; 183 const struct dsa_port *cpu_dp; 184 const char *mac; 185 struct device_node *dn; 186 unsigned int ageing_time; 187 bool vlan_filtering; 188 u8 stp_state; 189 struct net_device *bridge_dev; 190 struct devlink_port devlink_port; 191 struct phylink *pl; 192 193 struct work_struct xmit_work; 194 struct sk_buff_head xmit_queue; 195 196 /* 197 * Give the switch driver somewhere to hang its per-port private data 198 * structures (accessible from the tagger). 199 */ 200 void *priv; 201 202 /* 203 * Original copy of the master netdev ethtool_ops 204 */ 205 const struct ethtool_ops *orig_ethtool_ops; 206 207 /* 208 * Original copy of the master netdev net_device_ops 209 */ 210 const struct net_device_ops *orig_ndo_ops; 211 }; 212 213 struct dsa_switch { 214 struct device *dev; 215 216 /* 217 * Parent switch tree, and switch index. 218 */ 219 struct dsa_switch_tree *dst; 220 unsigned int index; 221 222 /* Listener for switch fabric events */ 223 struct notifier_block nb; 224 225 /* 226 * Give the switch driver somewhere to hang its private data 227 * structure. 228 */ 229 void *priv; 230 231 /* 232 * Configuration data for this switch. 233 */ 234 struct dsa_chip_data *cd; 235 236 /* 237 * The switch operations. 238 */ 239 const struct dsa_switch_ops *ops; 240 241 /* 242 * An array of which element [a] indicates which port on this 243 * switch should be used to send packets to that are destined 244 * for switch a. Can be NULL if there is only one switch chip. 245 */ 246 s8 rtable[DSA_MAX_SWITCHES]; 247 248 /* 249 * Slave mii_bus and devices for the individual ports. 250 */ 251 u32 phys_mii_mask; 252 struct mii_bus *slave_mii_bus; 253 254 /* Ageing Time limits in msecs */ 255 unsigned int ageing_time_min; 256 unsigned int ageing_time_max; 257 258 /* devlink used to represent this switch device */ 259 struct devlink *devlink; 260 261 /* Number of switch port queues */ 262 unsigned int num_tx_queues; 263 264 /* Disallow bridge core from requesting different VLAN awareness 265 * settings on ports if not hardware-supported 266 */ 267 bool vlan_filtering_is_global; 268 269 /* In case vlan_filtering_is_global is set, the VLAN awareness state 270 * should be retrieved from here and not from the per-port settings. 271 */ 272 bool vlan_filtering; 273 274 unsigned long *bitmap; 275 unsigned long _bitmap; 276 277 /* Dynamically allocated ports, keep last */ 278 size_t num_ports; 279 struct dsa_port ports[]; 280 }; 281 282 static inline const struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 283 { 284 return &ds->ports[p]; 285 } 286 287 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 288 { 289 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 290 } 291 292 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 293 { 294 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 295 } 296 297 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 298 { 299 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 300 } 301 302 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 303 { 304 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 305 } 306 307 static inline u32 dsa_user_ports(struct dsa_switch *ds) 308 { 309 u32 mask = 0; 310 int p; 311 312 for (p = 0; p < ds->num_ports; p++) 313 if (dsa_is_user_port(ds, p)) 314 mask |= BIT(p); 315 316 return mask; 317 } 318 319 /* Return the local port used to reach an arbitrary switch port */ 320 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 321 int port) 322 { 323 if (device == ds->index) 324 return port; 325 else 326 return ds->rtable[device]; 327 } 328 329 /* Return the local port used to reach the dedicated CPU port */ 330 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 331 { 332 const struct dsa_port *dp = dsa_to_port(ds, port); 333 const struct dsa_port *cpu_dp = dp->cpu_dp; 334 335 if (!cpu_dp) 336 return port; 337 338 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 339 } 340 341 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 342 { 343 const struct dsa_switch *ds = dp->ds; 344 345 if (ds->vlan_filtering_is_global) 346 return ds->vlan_filtering; 347 else 348 return dp->vlan_filtering; 349 } 350 351 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 352 bool is_static, void *data); 353 struct dsa_switch_ops { 354 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 355 int port); 356 357 int (*setup)(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); 516 517 /* 518 * Cross-chip operations 519 */ 520 int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index, 521 int port, struct net_device *br); 522 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index, 523 int port, struct net_device *br); 524 525 /* 526 * PTP functionality 527 */ 528 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 529 struct ifreq *ifr); 530 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 531 struct ifreq *ifr); 532 bool (*port_txtstamp)(struct dsa_switch *ds, int port, 533 struct sk_buff *clone, unsigned int type); 534 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 535 struct sk_buff *skb, unsigned int type); 536 537 /* 538 * Deferred frame Tx 539 */ 540 netdev_tx_t (*port_deferred_xmit)(struct dsa_switch *ds, int port, 541 struct sk_buff *skb); 542 }; 543 544 struct dsa_switch_driver { 545 struct list_head list; 546 const struct dsa_switch_ops *ops; 547 }; 548 549 struct net_device *dsa_dev_to_net_device(struct device *dev); 550 551 /* Keep inline for faster access in hot path */ 552 static inline bool netdev_uses_dsa(struct net_device *dev) 553 { 554 #if IS_ENABLED(CONFIG_NET_DSA) 555 return dev->dsa_ptr && dev->dsa_ptr->rcv; 556 #endif 557 return false; 558 } 559 560 static inline bool dsa_can_decode(const struct sk_buff *skb, 561 struct net_device *dev) 562 { 563 #if IS_ENABLED(CONFIG_NET_DSA) 564 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev); 565 #endif 566 return false; 567 } 568 569 struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n); 570 void dsa_unregister_switch(struct dsa_switch *ds); 571 int dsa_register_switch(struct dsa_switch *ds); 572 #ifdef CONFIG_PM_SLEEP 573 int dsa_switch_suspend(struct dsa_switch *ds); 574 int dsa_switch_resume(struct dsa_switch *ds); 575 #else 576 static inline int dsa_switch_suspend(struct dsa_switch *ds) 577 { 578 return 0; 579 } 580 static inline int dsa_switch_resume(struct dsa_switch *ds) 581 { 582 return 0; 583 } 584 #endif /* CONFIG_PM_SLEEP */ 585 586 enum dsa_notifier_type { 587 DSA_PORT_REGISTER, 588 DSA_PORT_UNREGISTER, 589 }; 590 591 struct dsa_notifier_info { 592 struct net_device *dev; 593 }; 594 595 struct dsa_notifier_register_info { 596 struct dsa_notifier_info info; /* must be first */ 597 struct net_device *master; 598 unsigned int port_number; 599 unsigned int switch_number; 600 }; 601 602 static inline struct net_device * 603 dsa_notifier_info_to_dev(const struct dsa_notifier_info *info) 604 { 605 return info->dev; 606 } 607 608 #if IS_ENABLED(CONFIG_NET_DSA) 609 int register_dsa_notifier(struct notifier_block *nb); 610 int unregister_dsa_notifier(struct notifier_block *nb); 611 int call_dsa_notifiers(unsigned long val, struct net_device *dev, 612 struct dsa_notifier_info *info); 613 #else 614 static inline int register_dsa_notifier(struct notifier_block *nb) 615 { 616 return 0; 617 } 618 619 static inline int unregister_dsa_notifier(struct notifier_block *nb) 620 { 621 return 0; 622 } 623 624 static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev, 625 struct dsa_notifier_info *info) 626 { 627 return NOTIFY_DONE; 628 } 629 #endif 630 631 /* Broadcom tag specific helpers to insert and extract queue/port number */ 632 #define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q) 633 #define BRCM_TAG_GET_PORT(v) ((v) >> 8) 634 #define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff) 635 636 637 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 638 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data); 639 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data); 640 int dsa_port_get_phy_sset_count(struct dsa_port *dp); 641 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 642 643 struct dsa_tag_driver { 644 const struct dsa_device_ops *ops; 645 struct list_head list; 646 struct module *owner; 647 }; 648 649 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 650 unsigned int count, 651 struct module *owner); 652 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 653 unsigned int count); 654 655 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 656 static int __init dsa_tag_driver_module_init(void) \ 657 { \ 658 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 659 THIS_MODULE); \ 660 return 0; \ 661 } \ 662 module_init(dsa_tag_driver_module_init); \ 663 \ 664 static void __exit dsa_tag_driver_module_exit(void) \ 665 { \ 666 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 667 } \ 668 module_exit(dsa_tag_driver_module_exit) 669 670 /** 671 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 672 * drivers 673 * @__ops_array: Array of tag driver strucutres 674 * 675 * Helper macro for DSA tag drivers which do not do anything special 676 * in module init/exit. Each module may only use this macro once, and 677 * calling it replaces module_init() and module_exit(). 678 */ 679 #define module_dsa_tag_drivers(__ops_array) \ 680 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 681 682 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 683 684 /* Create a static structure we can build a linked list of dsa_tag 685 * drivers 686 */ 687 #define DSA_TAG_DRIVER(__ops) \ 688 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 689 .ops = &__ops, \ 690 } 691 692 /** 693 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 694 * driver 695 * @__ops: Single tag driver structures 696 * 697 * Helper macro for DSA tag drivers which do not do anything special 698 * in module init/exit. Each module may only use this macro once, and 699 * calling it replaces module_init() and module_exit(). 700 */ 701 #define module_dsa_tag_driver(__ops) \ 702 DSA_TAG_DRIVER(__ops); \ 703 \ 704 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 705 &DSA_TAG_DRIVER_NAME(__ops) \ 706 }; \ 707 module_dsa_tag_drivers(dsa_tag_driver_array) 708 #endif 709 710