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 45 enum dsa_tag_protocol { 46 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, 47 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, 48 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, 49 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, 50 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, 51 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE, 52 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE, 53 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, 54 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, 55 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, 56 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, 57 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, 58 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, 59 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE, 60 }; 61 62 struct packet_type; 63 struct dsa_switch; 64 65 struct dsa_device_ops { 66 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev); 67 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 68 struct packet_type *pt); 69 int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto, 70 int *offset); 71 /* Used to determine which traffic should match the DSA filter in 72 * eth_type_trans, and which, if any, should bypass it and be processed 73 * as regular on the master net device. 74 */ 75 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 76 unsigned int overhead; 77 const char *name; 78 enum dsa_tag_protocol proto; 79 }; 80 81 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-" 82 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \ 83 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE)) 84 85 struct dsa_skb_cb { 86 struct sk_buff *clone; 87 bool deferred_xmit; 88 }; 89 90 struct __dsa_skb_cb { 91 struct dsa_skb_cb cb; 92 u8 priv[48 - sizeof(struct dsa_skb_cb)]; 93 }; 94 95 #define __DSA_SKB_CB(skb) ((struct __dsa_skb_cb *)((skb)->cb)) 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 unsigned long *bitmap; 277 unsigned long _bitmap; 278 279 /* Dynamically allocated ports, keep last */ 280 size_t num_ports; 281 struct dsa_port ports[]; 282 }; 283 284 static inline const struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 285 { 286 return &ds->ports[p]; 287 } 288 289 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 290 { 291 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 292 } 293 294 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 295 { 296 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 297 } 298 299 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 300 { 301 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 302 } 303 304 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 305 { 306 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 307 } 308 309 static inline u32 dsa_user_ports(struct dsa_switch *ds) 310 { 311 u32 mask = 0; 312 int p; 313 314 for (p = 0; p < ds->num_ports; p++) 315 if (dsa_is_user_port(ds, p)) 316 mask |= BIT(p); 317 318 return mask; 319 } 320 321 /* Return the local port used to reach an arbitrary switch port */ 322 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 323 int port) 324 { 325 if (device == ds->index) 326 return port; 327 else 328 return ds->rtable[device]; 329 } 330 331 /* Return the local port used to reach the dedicated CPU port */ 332 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 333 { 334 const struct dsa_port *dp = dsa_to_port(ds, port); 335 const struct dsa_port *cpu_dp = dp->cpu_dp; 336 337 if (!cpu_dp) 338 return port; 339 340 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 341 } 342 343 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 344 { 345 const struct dsa_switch *ds = dp->ds; 346 347 if (ds->vlan_filtering_is_global) 348 return ds->vlan_filtering; 349 else 350 return dp->vlan_filtering; 351 } 352 353 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 354 bool is_static, void *data); 355 struct dsa_switch_ops { 356 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 357 int port); 358 359 int (*setup)(struct dsa_switch *ds); 360 void (*teardown)(struct dsa_switch *ds); 361 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 362 363 /* 364 * Access to the switch's PHY registers. 365 */ 366 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 367 int (*phy_write)(struct dsa_switch *ds, int port, 368 int regnum, u16 val); 369 370 /* 371 * Link state adjustment (called from libphy) 372 */ 373 void (*adjust_link)(struct dsa_switch *ds, int port, 374 struct phy_device *phydev); 375 void (*fixed_link_update)(struct dsa_switch *ds, int port, 376 struct fixed_phy_status *st); 377 378 /* 379 * PHYLINK integration 380 */ 381 void (*phylink_validate)(struct dsa_switch *ds, int port, 382 unsigned long *supported, 383 struct phylink_link_state *state); 384 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 385 struct phylink_link_state *state); 386 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 387 unsigned int mode, 388 const struct phylink_link_state *state); 389 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 390 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 391 unsigned int mode, 392 phy_interface_t interface); 393 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 394 unsigned int mode, 395 phy_interface_t interface, 396 struct phy_device *phydev); 397 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 398 struct phylink_link_state *state); 399 /* 400 * ethtool hardware statistics. 401 */ 402 void (*get_strings)(struct dsa_switch *ds, int port, 403 u32 stringset, uint8_t *data); 404 void (*get_ethtool_stats)(struct dsa_switch *ds, 405 int port, uint64_t *data); 406 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 407 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 408 int port, uint64_t *data); 409 410 /* 411 * ethtool Wake-on-LAN 412 */ 413 void (*get_wol)(struct dsa_switch *ds, int port, 414 struct ethtool_wolinfo *w); 415 int (*set_wol)(struct dsa_switch *ds, int port, 416 struct ethtool_wolinfo *w); 417 418 /* 419 * ethtool timestamp info 420 */ 421 int (*get_ts_info)(struct dsa_switch *ds, int port, 422 struct ethtool_ts_info *ts); 423 424 /* 425 * Suspend and resume 426 */ 427 int (*suspend)(struct dsa_switch *ds); 428 int (*resume)(struct dsa_switch *ds); 429 430 /* 431 * Port enable/disable 432 */ 433 int (*port_enable)(struct dsa_switch *ds, int port, 434 struct phy_device *phy); 435 void (*port_disable)(struct dsa_switch *ds, int port); 436 437 /* 438 * Port's MAC EEE settings 439 */ 440 int (*set_mac_eee)(struct dsa_switch *ds, int port, 441 struct ethtool_eee *e); 442 int (*get_mac_eee)(struct dsa_switch *ds, int port, 443 struct ethtool_eee *e); 444 445 /* EEPROM access */ 446 int (*get_eeprom_len)(struct dsa_switch *ds); 447 int (*get_eeprom)(struct dsa_switch *ds, 448 struct ethtool_eeprom *eeprom, u8 *data); 449 int (*set_eeprom)(struct dsa_switch *ds, 450 struct ethtool_eeprom *eeprom, u8 *data); 451 452 /* 453 * Register access. 454 */ 455 int (*get_regs_len)(struct dsa_switch *ds, int port); 456 void (*get_regs)(struct dsa_switch *ds, int port, 457 struct ethtool_regs *regs, void *p); 458 459 /* 460 * Bridge integration 461 */ 462 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 463 int (*port_bridge_join)(struct dsa_switch *ds, int port, 464 struct net_device *bridge); 465 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 466 struct net_device *bridge); 467 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 468 u8 state); 469 void (*port_fast_age)(struct dsa_switch *ds, int port); 470 int (*port_egress_floods)(struct dsa_switch *ds, int port, 471 bool unicast, bool multicast); 472 473 /* 474 * VLAN support 475 */ 476 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 477 bool vlan_filtering); 478 int (*port_vlan_prepare)(struct dsa_switch *ds, int port, 479 const struct switchdev_obj_port_vlan *vlan); 480 void (*port_vlan_add)(struct dsa_switch *ds, int port, 481 const struct switchdev_obj_port_vlan *vlan); 482 int (*port_vlan_del)(struct dsa_switch *ds, int port, 483 const struct switchdev_obj_port_vlan *vlan); 484 /* 485 * Forwarding database 486 */ 487 int (*port_fdb_add)(struct dsa_switch *ds, int port, 488 const unsigned char *addr, u16 vid); 489 int (*port_fdb_del)(struct dsa_switch *ds, int port, 490 const unsigned char *addr, u16 vid); 491 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 492 dsa_fdb_dump_cb_t *cb, void *data); 493 494 /* 495 * Multicast database 496 */ 497 int (*port_mdb_prepare)(struct dsa_switch *ds, int port, 498 const struct switchdev_obj_port_mdb *mdb); 499 void (*port_mdb_add)(struct dsa_switch *ds, int port, 500 const struct switchdev_obj_port_mdb *mdb); 501 int (*port_mdb_del)(struct dsa_switch *ds, int port, 502 const struct switchdev_obj_port_mdb *mdb); 503 /* 504 * RXNFC 505 */ 506 int (*get_rxnfc)(struct dsa_switch *ds, int port, 507 struct ethtool_rxnfc *nfc, u32 *rule_locs); 508 int (*set_rxnfc)(struct dsa_switch *ds, int port, 509 struct ethtool_rxnfc *nfc); 510 511 /* 512 * TC integration 513 */ 514 int (*port_mirror_add)(struct dsa_switch *ds, int port, 515 struct dsa_mall_mirror_tc_entry *mirror, 516 bool ingress); 517 void (*port_mirror_del)(struct dsa_switch *ds, int port, 518 struct dsa_mall_mirror_tc_entry *mirror); 519 520 /* 521 * Cross-chip operations 522 */ 523 int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index, 524 int port, struct net_device *br); 525 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index, 526 int port, struct net_device *br); 527 528 /* 529 * PTP functionality 530 */ 531 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 532 struct ifreq *ifr); 533 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 534 struct ifreq *ifr); 535 bool (*port_txtstamp)(struct dsa_switch *ds, int port, 536 struct sk_buff *clone, unsigned int type); 537 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 538 struct sk_buff *skb, unsigned int type); 539 540 /* 541 * Deferred frame Tx 542 */ 543 netdev_tx_t (*port_deferred_xmit)(struct dsa_switch *ds, int port, 544 struct sk_buff *skb); 545 }; 546 547 struct dsa_switch_driver { 548 struct list_head list; 549 const struct dsa_switch_ops *ops; 550 }; 551 552 struct net_device *dsa_dev_to_net_device(struct device *dev); 553 554 /* Keep inline for faster access in hot path */ 555 static inline bool netdev_uses_dsa(struct net_device *dev) 556 { 557 #if IS_ENABLED(CONFIG_NET_DSA) 558 return dev->dsa_ptr && dev->dsa_ptr->rcv; 559 #endif 560 return false; 561 } 562 563 static inline bool dsa_can_decode(const struct sk_buff *skb, 564 struct net_device *dev) 565 { 566 #if IS_ENABLED(CONFIG_NET_DSA) 567 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev); 568 #endif 569 return false; 570 } 571 572 struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n); 573 void dsa_unregister_switch(struct dsa_switch *ds); 574 int dsa_register_switch(struct dsa_switch *ds); 575 #ifdef CONFIG_PM_SLEEP 576 int dsa_switch_suspend(struct dsa_switch *ds); 577 int dsa_switch_resume(struct dsa_switch *ds); 578 #else 579 static inline int dsa_switch_suspend(struct dsa_switch *ds) 580 { 581 return 0; 582 } 583 static inline int dsa_switch_resume(struct dsa_switch *ds) 584 { 585 return 0; 586 } 587 #endif /* CONFIG_PM_SLEEP */ 588 589 enum dsa_notifier_type { 590 DSA_PORT_REGISTER, 591 DSA_PORT_UNREGISTER, 592 }; 593 594 struct dsa_notifier_info { 595 struct net_device *dev; 596 }; 597 598 struct dsa_notifier_register_info { 599 struct dsa_notifier_info info; /* must be first */ 600 struct net_device *master; 601 unsigned int port_number; 602 unsigned int switch_number; 603 }; 604 605 static inline struct net_device * 606 dsa_notifier_info_to_dev(const struct dsa_notifier_info *info) 607 { 608 return info->dev; 609 } 610 611 #if IS_ENABLED(CONFIG_NET_DSA) 612 int register_dsa_notifier(struct notifier_block *nb); 613 int unregister_dsa_notifier(struct notifier_block *nb); 614 int call_dsa_notifiers(unsigned long val, struct net_device *dev, 615 struct dsa_notifier_info *info); 616 #else 617 static inline int register_dsa_notifier(struct notifier_block *nb) 618 { 619 return 0; 620 } 621 622 static inline int unregister_dsa_notifier(struct notifier_block *nb) 623 { 624 return 0; 625 } 626 627 static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev, 628 struct dsa_notifier_info *info) 629 { 630 return NOTIFY_DONE; 631 } 632 #endif 633 634 /* Broadcom tag specific helpers to insert and extract queue/port number */ 635 #define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q) 636 #define BRCM_TAG_GET_PORT(v) ((v) >> 8) 637 #define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff) 638 639 640 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 641 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data); 642 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data); 643 int dsa_port_get_phy_sset_count(struct dsa_port *dp); 644 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 645 646 struct dsa_tag_driver { 647 const struct dsa_device_ops *ops; 648 struct list_head list; 649 struct module *owner; 650 }; 651 652 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 653 unsigned int count, 654 struct module *owner); 655 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 656 unsigned int count); 657 658 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 659 static int __init dsa_tag_driver_module_init(void) \ 660 { \ 661 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 662 THIS_MODULE); \ 663 return 0; \ 664 } \ 665 module_init(dsa_tag_driver_module_init); \ 666 \ 667 static void __exit dsa_tag_driver_module_exit(void) \ 668 { \ 669 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 670 } \ 671 module_exit(dsa_tag_driver_module_exit) 672 673 /** 674 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 675 * drivers 676 * @__ops_array: Array of tag driver strucutres 677 * 678 * Helper macro for DSA tag drivers which do not do anything special 679 * in module init/exit. Each module may only use this macro once, and 680 * calling it replaces module_init() and module_exit(). 681 */ 682 #define module_dsa_tag_drivers(__ops_array) \ 683 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 684 685 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 686 687 /* Create a static structure we can build a linked list of dsa_tag 688 * drivers 689 */ 690 #define DSA_TAG_DRIVER(__ops) \ 691 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 692 .ops = &__ops, \ 693 } 694 695 /** 696 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 697 * driver 698 * @__ops: Single tag driver structures 699 * 700 * Helper macro for DSA tag drivers which do not do anything special 701 * in module init/exit. Each module may only use this macro once, and 702 * calling it replaces module_init() and module_exit(). 703 */ 704 #define module_dsa_tag_driver(__ops) \ 705 DSA_TAG_DRIVER(__ops); \ 706 \ 707 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 708 &DSA_TAG_DRIVER_NAME(__ops) \ 709 }; \ 710 module_dsa_tag_drivers(dsa_tag_driver_array) 711 #endif 712 713