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 <net/devlink.h> 26 #include <net/switchdev.h> 27 28 struct tc_action; 29 struct phy_device; 30 struct fixed_phy_status; 31 struct phylink_link_state; 32 33 #define DSA_TAG_PROTO_NONE_VALUE 0 34 #define DSA_TAG_PROTO_BRCM_VALUE 1 35 #define DSA_TAG_PROTO_BRCM_PREPEND_VALUE 2 36 #define DSA_TAG_PROTO_DSA_VALUE 3 37 #define DSA_TAG_PROTO_EDSA_VALUE 4 38 #define DSA_TAG_PROTO_GSWIP_VALUE 5 39 #define DSA_TAG_PROTO_KSZ9477_VALUE 6 40 #define DSA_TAG_PROTO_KSZ9893_VALUE 7 41 #define DSA_TAG_PROTO_LAN9303_VALUE 8 42 #define DSA_TAG_PROTO_MTK_VALUE 9 43 #define DSA_TAG_PROTO_QCA_VALUE 10 44 #define DSA_TAG_PROTO_TRAILER_VALUE 11 45 #define DSA_TAG_PROTO_8021Q_VALUE 12 46 #define DSA_TAG_PROTO_SJA1105_VALUE 13 47 48 enum dsa_tag_protocol { 49 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, 50 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE, 51 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE, 52 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE, 53 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE, 54 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE, 55 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE, 56 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, 57 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, 58 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, 59 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, 60 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, 61 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, 62 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE, 63 }; 64 65 struct packet_type; 66 struct dsa_switch; 67 68 struct dsa_device_ops { 69 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev); 70 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 71 struct packet_type *pt); 72 int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto, 73 int *offset); 74 /* Used to determine which traffic should match the DSA filter in 75 * eth_type_trans, and which, if any, should bypass it and be processed 76 * as regular on the master net device. 77 */ 78 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 79 unsigned int overhead; 80 const char *name; 81 enum dsa_tag_protocol proto; 82 }; 83 84 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-" 85 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \ 86 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE)) 87 88 struct dsa_skb_cb { 89 struct sk_buff *clone; 90 bool deferred_xmit; 91 }; 92 93 struct __dsa_skb_cb { 94 struct dsa_skb_cb cb; 95 u8 priv[48 - sizeof(struct dsa_skb_cb)]; 96 }; 97 98 #define __DSA_SKB_CB(skb) ((struct __dsa_skb_cb *)((skb)->cb)) 99 100 #define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb)) 101 102 #define DSA_SKB_CB_COPY(nskb, skb) \ 103 { *__DSA_SKB_CB(nskb) = *__DSA_SKB_CB(skb); } 104 105 #define DSA_SKB_CB_ZERO(skb) \ 106 { *__DSA_SKB_CB(skb) = (struct __dsa_skb_cb) {0}; } 107 108 #define DSA_SKB_CB_PRIV(skb) \ 109 ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv)) 110 111 #define DSA_SKB_CB_CLONE(_clone, _skb) \ 112 { \ 113 struct sk_buff *clone = _clone; \ 114 struct sk_buff *skb = _skb; \ 115 \ 116 DSA_SKB_CB_COPY(clone, skb); \ 117 DSA_SKB_CB(skb)->clone = clone; \ 118 } 119 120 struct dsa_switch_tree { 121 struct list_head list; 122 123 /* Notifier chain for switch-wide events */ 124 struct raw_notifier_head nh; 125 126 /* Tree identifier */ 127 unsigned int index; 128 129 /* Number of switches attached to this tree */ 130 struct kref refcount; 131 132 /* Has this tree been applied to the hardware? */ 133 bool setup; 134 135 /* 136 * Configuration data for the platform device that owns 137 * this dsa switch tree instance. 138 */ 139 struct dsa_platform_data *pd; 140 141 /* 142 * The switch port to which the CPU is attached. 143 */ 144 struct dsa_port *cpu_dp; 145 146 /* 147 * Data for the individual switch chips. 148 */ 149 struct dsa_switch *ds[DSA_MAX_SWITCHES]; 150 }; 151 152 /* TC matchall action types, only mirroring for now */ 153 enum dsa_port_mall_action_type { 154 DSA_PORT_MALL_MIRROR, 155 }; 156 157 /* TC mirroring entry */ 158 struct dsa_mall_mirror_tc_entry { 159 u8 to_local_port; 160 bool ingress; 161 }; 162 163 /* TC matchall entry */ 164 struct dsa_mall_tc_entry { 165 struct list_head list; 166 unsigned long cookie; 167 enum dsa_port_mall_action_type type; 168 union { 169 struct dsa_mall_mirror_tc_entry mirror; 170 }; 171 }; 172 173 174 struct dsa_port { 175 /* A CPU port is physically connected to a master device. 176 * A user port exposed to userspace has a slave device. 177 */ 178 union { 179 struct net_device *master; 180 struct net_device *slave; 181 }; 182 183 /* CPU port tagging operations used by master or slave devices */ 184 const struct dsa_device_ops *tag_ops; 185 186 /* Copies for faster access in master receive hot path */ 187 struct dsa_switch_tree *dst; 188 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev, 189 struct packet_type *pt); 190 bool (*filter)(const struct sk_buff *skb, struct net_device *dev); 191 192 enum { 193 DSA_PORT_TYPE_UNUSED = 0, 194 DSA_PORT_TYPE_CPU, 195 DSA_PORT_TYPE_DSA, 196 DSA_PORT_TYPE_USER, 197 } type; 198 199 struct dsa_switch *ds; 200 unsigned int index; 201 const char *name; 202 const struct dsa_port *cpu_dp; 203 const char *mac; 204 struct device_node *dn; 205 unsigned int ageing_time; 206 bool vlan_filtering; 207 u8 stp_state; 208 struct net_device *bridge_dev; 209 struct devlink_port devlink_port; 210 struct phylink *pl; 211 212 struct work_struct xmit_work; 213 struct sk_buff_head xmit_queue; 214 215 /* 216 * Give the switch driver somewhere to hang its per-port private data 217 * structures (accessible from the tagger). 218 */ 219 void *priv; 220 221 /* 222 * Original copy of the master netdev ethtool_ops 223 */ 224 const struct ethtool_ops *orig_ethtool_ops; 225 226 /* 227 * Original copy of the master netdev net_device_ops 228 */ 229 const struct net_device_ops *orig_ndo_ops; 230 }; 231 232 struct dsa_switch { 233 struct device *dev; 234 235 /* 236 * Parent switch tree, and switch index. 237 */ 238 struct dsa_switch_tree *dst; 239 unsigned int index; 240 241 /* Listener for switch fabric events */ 242 struct notifier_block nb; 243 244 /* 245 * Give the switch driver somewhere to hang its private data 246 * structure. 247 */ 248 void *priv; 249 250 /* 251 * Configuration data for this switch. 252 */ 253 struct dsa_chip_data *cd; 254 255 /* 256 * The switch operations. 257 */ 258 const struct dsa_switch_ops *ops; 259 260 /* 261 * An array of which element [a] indicates which port on this 262 * switch should be used to send packets to that are destined 263 * for switch a. Can be NULL if there is only one switch chip. 264 */ 265 s8 rtable[DSA_MAX_SWITCHES]; 266 267 /* 268 * Slave mii_bus and devices for the individual ports. 269 */ 270 u32 phys_mii_mask; 271 struct mii_bus *slave_mii_bus; 272 273 /* Ageing Time limits in msecs */ 274 unsigned int ageing_time_min; 275 unsigned int ageing_time_max; 276 277 /* devlink used to represent this switch device */ 278 struct devlink *devlink; 279 280 /* Number of switch port queues */ 281 unsigned int num_tx_queues; 282 283 /* Disallow bridge core from requesting different VLAN awareness 284 * settings on ports if not hardware-supported 285 */ 286 bool vlan_filtering_is_global; 287 288 /* In case vlan_filtering_is_global is set, the VLAN awareness state 289 * should be retrieved from here and not from the per-port settings. 290 */ 291 bool vlan_filtering; 292 293 unsigned long *bitmap; 294 unsigned long _bitmap; 295 296 /* Dynamically allocated ports, keep last */ 297 size_t num_ports; 298 struct dsa_port ports[]; 299 }; 300 301 static inline const struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p) 302 { 303 return &ds->ports[p]; 304 } 305 306 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p) 307 { 308 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED; 309 } 310 311 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) 312 { 313 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU; 314 } 315 316 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) 317 { 318 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA; 319 } 320 321 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p) 322 { 323 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER; 324 } 325 326 static inline u32 dsa_user_ports(struct dsa_switch *ds) 327 { 328 u32 mask = 0; 329 int p; 330 331 for (p = 0; p < ds->num_ports; p++) 332 if (dsa_is_user_port(ds, p)) 333 mask |= BIT(p); 334 335 return mask; 336 } 337 338 /* Return the local port used to reach an arbitrary switch port */ 339 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device, 340 int port) 341 { 342 if (device == ds->index) 343 return port; 344 else 345 return ds->rtable[device]; 346 } 347 348 /* Return the local port used to reach the dedicated CPU port */ 349 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port) 350 { 351 const struct dsa_port *dp = dsa_to_port(ds, port); 352 const struct dsa_port *cpu_dp = dp->cpu_dp; 353 354 if (!cpu_dp) 355 return port; 356 357 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index); 358 } 359 360 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp) 361 { 362 const struct dsa_switch *ds = dp->ds; 363 364 if (ds->vlan_filtering_is_global) 365 return ds->vlan_filtering; 366 else 367 return dp->vlan_filtering; 368 } 369 370 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid, 371 bool is_static, void *data); 372 struct dsa_switch_ops { 373 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds, 374 int port); 375 376 int (*setup)(struct dsa_switch *ds); 377 u32 (*get_phy_flags)(struct dsa_switch *ds, int port); 378 379 /* 380 * Access to the switch's PHY registers. 381 */ 382 int (*phy_read)(struct dsa_switch *ds, int port, int regnum); 383 int (*phy_write)(struct dsa_switch *ds, int port, 384 int regnum, u16 val); 385 386 /* 387 * Link state adjustment (called from libphy) 388 */ 389 void (*adjust_link)(struct dsa_switch *ds, int port, 390 struct phy_device *phydev); 391 void (*fixed_link_update)(struct dsa_switch *ds, int port, 392 struct fixed_phy_status *st); 393 394 /* 395 * PHYLINK integration 396 */ 397 void (*phylink_validate)(struct dsa_switch *ds, int port, 398 unsigned long *supported, 399 struct phylink_link_state *state); 400 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port, 401 struct phylink_link_state *state); 402 void (*phylink_mac_config)(struct dsa_switch *ds, int port, 403 unsigned int mode, 404 const struct phylink_link_state *state); 405 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port); 406 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port, 407 unsigned int mode, 408 phy_interface_t interface); 409 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port, 410 unsigned int mode, 411 phy_interface_t interface, 412 struct phy_device *phydev); 413 void (*phylink_fixed_state)(struct dsa_switch *ds, int port, 414 struct phylink_link_state *state); 415 /* 416 * ethtool hardware statistics. 417 */ 418 void (*get_strings)(struct dsa_switch *ds, int port, 419 u32 stringset, uint8_t *data); 420 void (*get_ethtool_stats)(struct dsa_switch *ds, 421 int port, uint64_t *data); 422 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset); 423 void (*get_ethtool_phy_stats)(struct dsa_switch *ds, 424 int port, uint64_t *data); 425 426 /* 427 * ethtool Wake-on-LAN 428 */ 429 void (*get_wol)(struct dsa_switch *ds, int port, 430 struct ethtool_wolinfo *w); 431 int (*set_wol)(struct dsa_switch *ds, int port, 432 struct ethtool_wolinfo *w); 433 434 /* 435 * ethtool timestamp info 436 */ 437 int (*get_ts_info)(struct dsa_switch *ds, int port, 438 struct ethtool_ts_info *ts); 439 440 /* 441 * Suspend and resume 442 */ 443 int (*suspend)(struct dsa_switch *ds); 444 int (*resume)(struct dsa_switch *ds); 445 446 /* 447 * Port enable/disable 448 */ 449 int (*port_enable)(struct dsa_switch *ds, int port, 450 struct phy_device *phy); 451 void (*port_disable)(struct dsa_switch *ds, int port); 452 453 /* 454 * Port's MAC EEE settings 455 */ 456 int (*set_mac_eee)(struct dsa_switch *ds, int port, 457 struct ethtool_eee *e); 458 int (*get_mac_eee)(struct dsa_switch *ds, int port, 459 struct ethtool_eee *e); 460 461 /* EEPROM access */ 462 int (*get_eeprom_len)(struct dsa_switch *ds); 463 int (*get_eeprom)(struct dsa_switch *ds, 464 struct ethtool_eeprom *eeprom, u8 *data); 465 int (*set_eeprom)(struct dsa_switch *ds, 466 struct ethtool_eeprom *eeprom, u8 *data); 467 468 /* 469 * Register access. 470 */ 471 int (*get_regs_len)(struct dsa_switch *ds, int port); 472 void (*get_regs)(struct dsa_switch *ds, int port, 473 struct ethtool_regs *regs, void *p); 474 475 /* 476 * Bridge integration 477 */ 478 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs); 479 int (*port_bridge_join)(struct dsa_switch *ds, int port, 480 struct net_device *bridge); 481 void (*port_bridge_leave)(struct dsa_switch *ds, int port, 482 struct net_device *bridge); 483 void (*port_stp_state_set)(struct dsa_switch *ds, int port, 484 u8 state); 485 void (*port_fast_age)(struct dsa_switch *ds, int port); 486 int (*port_egress_floods)(struct dsa_switch *ds, int port, 487 bool unicast, bool multicast); 488 489 /* 490 * VLAN support 491 */ 492 int (*port_vlan_filtering)(struct dsa_switch *ds, int port, 493 bool vlan_filtering); 494 int (*port_vlan_prepare)(struct dsa_switch *ds, int port, 495 const struct switchdev_obj_port_vlan *vlan); 496 void (*port_vlan_add)(struct dsa_switch *ds, int port, 497 const struct switchdev_obj_port_vlan *vlan); 498 int (*port_vlan_del)(struct dsa_switch *ds, int port, 499 const struct switchdev_obj_port_vlan *vlan); 500 /* 501 * Forwarding database 502 */ 503 int (*port_fdb_add)(struct dsa_switch *ds, int port, 504 const unsigned char *addr, u16 vid); 505 int (*port_fdb_del)(struct dsa_switch *ds, int port, 506 const unsigned char *addr, u16 vid); 507 int (*port_fdb_dump)(struct dsa_switch *ds, int port, 508 dsa_fdb_dump_cb_t *cb, void *data); 509 510 /* 511 * Multicast database 512 */ 513 int (*port_mdb_prepare)(struct dsa_switch *ds, int port, 514 const struct switchdev_obj_port_mdb *mdb); 515 void (*port_mdb_add)(struct dsa_switch *ds, int port, 516 const struct switchdev_obj_port_mdb *mdb); 517 int (*port_mdb_del)(struct dsa_switch *ds, int port, 518 const struct switchdev_obj_port_mdb *mdb); 519 /* 520 * RXNFC 521 */ 522 int (*get_rxnfc)(struct dsa_switch *ds, int port, 523 struct ethtool_rxnfc *nfc, u32 *rule_locs); 524 int (*set_rxnfc)(struct dsa_switch *ds, int port, 525 struct ethtool_rxnfc *nfc); 526 527 /* 528 * TC integration 529 */ 530 int (*port_mirror_add)(struct dsa_switch *ds, int port, 531 struct dsa_mall_mirror_tc_entry *mirror, 532 bool ingress); 533 void (*port_mirror_del)(struct dsa_switch *ds, int port, 534 struct dsa_mall_mirror_tc_entry *mirror); 535 536 /* 537 * Cross-chip operations 538 */ 539 int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index, 540 int port, struct net_device *br); 541 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index, 542 int port, struct net_device *br); 543 544 /* 545 * PTP functionality 546 */ 547 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port, 548 struct ifreq *ifr); 549 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port, 550 struct ifreq *ifr); 551 bool (*port_txtstamp)(struct dsa_switch *ds, int port, 552 struct sk_buff *clone, unsigned int type); 553 bool (*port_rxtstamp)(struct dsa_switch *ds, int port, 554 struct sk_buff *skb, unsigned int type); 555 556 /* 557 * Deferred frame Tx 558 */ 559 netdev_tx_t (*port_deferred_xmit)(struct dsa_switch *ds, int port, 560 struct sk_buff *skb); 561 }; 562 563 struct dsa_switch_driver { 564 struct list_head list; 565 const struct dsa_switch_ops *ops; 566 }; 567 568 struct net_device *dsa_dev_to_net_device(struct device *dev); 569 570 /* Keep inline for faster access in hot path */ 571 static inline bool netdev_uses_dsa(struct net_device *dev) 572 { 573 #if IS_ENABLED(CONFIG_NET_DSA) 574 return dev->dsa_ptr && dev->dsa_ptr->rcv; 575 #endif 576 return false; 577 } 578 579 static inline bool dsa_can_decode(const struct sk_buff *skb, 580 struct net_device *dev) 581 { 582 #if IS_ENABLED(CONFIG_NET_DSA) 583 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev); 584 #endif 585 return false; 586 } 587 588 struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n); 589 void dsa_unregister_switch(struct dsa_switch *ds); 590 int dsa_register_switch(struct dsa_switch *ds); 591 #ifdef CONFIG_PM_SLEEP 592 int dsa_switch_suspend(struct dsa_switch *ds); 593 int dsa_switch_resume(struct dsa_switch *ds); 594 #else 595 static inline int dsa_switch_suspend(struct dsa_switch *ds) 596 { 597 return 0; 598 } 599 static inline int dsa_switch_resume(struct dsa_switch *ds) 600 { 601 return 0; 602 } 603 #endif /* CONFIG_PM_SLEEP */ 604 605 enum dsa_notifier_type { 606 DSA_PORT_REGISTER, 607 DSA_PORT_UNREGISTER, 608 }; 609 610 struct dsa_notifier_info { 611 struct net_device *dev; 612 }; 613 614 struct dsa_notifier_register_info { 615 struct dsa_notifier_info info; /* must be first */ 616 struct net_device *master; 617 unsigned int port_number; 618 unsigned int switch_number; 619 }; 620 621 static inline struct net_device * 622 dsa_notifier_info_to_dev(const struct dsa_notifier_info *info) 623 { 624 return info->dev; 625 } 626 627 #if IS_ENABLED(CONFIG_NET_DSA) 628 int register_dsa_notifier(struct notifier_block *nb); 629 int unregister_dsa_notifier(struct notifier_block *nb); 630 int call_dsa_notifiers(unsigned long val, struct net_device *dev, 631 struct dsa_notifier_info *info); 632 #else 633 static inline int register_dsa_notifier(struct notifier_block *nb) 634 { 635 return 0; 636 } 637 638 static inline int unregister_dsa_notifier(struct notifier_block *nb) 639 { 640 return 0; 641 } 642 643 static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev, 644 struct dsa_notifier_info *info) 645 { 646 return NOTIFY_DONE; 647 } 648 #endif 649 650 /* Broadcom tag specific helpers to insert and extract queue/port number */ 651 #define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q) 652 #define BRCM_TAG_GET_PORT(v) ((v) >> 8) 653 #define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff) 654 655 656 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev); 657 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data); 658 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data); 659 int dsa_port_get_phy_sset_count(struct dsa_port *dp); 660 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up); 661 662 struct dsa_tag_driver { 663 const struct dsa_device_ops *ops; 664 struct list_head list; 665 struct module *owner; 666 }; 667 668 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[], 669 unsigned int count, 670 struct module *owner); 671 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[], 672 unsigned int count); 673 674 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \ 675 static int __init dsa_tag_driver_module_init(void) \ 676 { \ 677 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \ 678 THIS_MODULE); \ 679 return 0; \ 680 } \ 681 module_init(dsa_tag_driver_module_init); \ 682 \ 683 static void __exit dsa_tag_driver_module_exit(void) \ 684 { \ 685 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \ 686 } \ 687 module_exit(dsa_tag_driver_module_exit) 688 689 /** 690 * module_dsa_tag_drivers() - Helper macro for registering DSA tag 691 * drivers 692 * @__ops_array: Array of tag driver strucutres 693 * 694 * Helper macro for DSA tag drivers which do not do anything special 695 * in module init/exit. Each module may only use this macro once, and 696 * calling it replaces module_init() and module_exit(). 697 */ 698 #define module_dsa_tag_drivers(__ops_array) \ 699 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array)) 700 701 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops 702 703 /* Create a static structure we can build a linked list of dsa_tag 704 * drivers 705 */ 706 #define DSA_TAG_DRIVER(__ops) \ 707 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \ 708 .ops = &__ops, \ 709 } 710 711 /** 712 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag 713 * driver 714 * @__ops: Single tag driver structures 715 * 716 * Helper macro for DSA tag drivers which do not do anything special 717 * in module init/exit. Each module may only use this macro once, and 718 * calling it replaces module_init() and module_exit(). 719 */ 720 #define module_dsa_tag_driver(__ops) \ 721 DSA_TAG_DRIVER(__ops); \ 722 \ 723 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \ 724 &DSA_TAG_DRIVER_NAME(__ops) \ 725 }; \ 726 module_dsa_tag_drivers(dsa_tag_driver_array) 727 #endif 728 729