1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
4 * Copyright (c) 2008-2009 Marvell Semiconductor
7 #ifndef __LINUX_NET_DSA_H
8 #define __LINUX_NET_DSA_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>
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>
27 struct fixed_phy_status;
28 struct phylink_link_state;
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 #define DSA_TAG_PROTO_OCELOT_VALUE 15
46 #define DSA_TAG_PROTO_AR9331_VALUE 16
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 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE,
64 DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE,
65 DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_VALUE,
71 struct dsa_device_ops {
72 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
73 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
74 struct packet_type *pt);
75 int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
77 /* Used to determine which traffic should match the DSA filter in
78 * eth_type_trans, and which, if any, should bypass it and be processed
79 * as regular on the master net device.
81 bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
82 unsigned int overhead;
84 enum dsa_tag_protocol proto;
87 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-"
88 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \
89 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE))
92 struct sk_buff *clone;
97 u8 priv[48 - sizeof(struct dsa_skb_cb)];
100 #define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb))
102 #define DSA_SKB_CB_PRIV(skb) \
103 ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv))
105 struct dsa_switch_tree {
106 struct list_head list;
108 /* Notifier chain for switch-wide events */
109 struct raw_notifier_head nh;
111 /* Tree identifier */
114 /* Number of switches attached to this tree */
115 struct kref refcount;
117 /* Has this tree been applied to the hardware? */
121 * Configuration data for the platform device that owns
122 * this dsa switch tree instance.
124 struct dsa_platform_data *pd;
126 /* List of switch ports */
127 struct list_head ports;
129 /* List of DSA links composing the routing table */
130 struct list_head rtable;
133 /* TC matchall action types */
134 enum dsa_port_mall_action_type {
135 DSA_PORT_MALL_MIRROR,
136 DSA_PORT_MALL_POLICER,
139 /* TC mirroring entry */
140 struct dsa_mall_mirror_tc_entry {
145 /* TC port policer entry */
146 struct dsa_mall_policer_tc_entry {
148 u64 rate_bytes_per_sec;
151 /* TC matchall entry */
152 struct dsa_mall_tc_entry {
153 struct list_head list;
154 unsigned long cookie;
155 enum dsa_port_mall_action_type type;
157 struct dsa_mall_mirror_tc_entry mirror;
158 struct dsa_mall_policer_tc_entry policer;
164 /* A CPU port is physically connected to a master device.
165 * A user port exposed to userspace has a slave device.
168 struct net_device *master;
169 struct net_device *slave;
172 /* CPU port tagging operations used by master or slave devices */
173 const struct dsa_device_ops *tag_ops;
175 /* Copies for faster access in master receive hot path */
176 struct dsa_switch_tree *dst;
177 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
178 struct packet_type *pt);
179 bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
182 DSA_PORT_TYPE_UNUSED = 0,
188 struct dsa_switch *ds;
191 struct dsa_port *cpu_dp;
193 struct device_node *dn;
194 unsigned int ageing_time;
197 struct net_device *bridge_dev;
198 struct devlink_port devlink_port;
200 struct phylink_config pl_config;
202 struct list_head list;
205 * Give the switch driver somewhere to hang its per-port private data
206 * structures (accessible from the tagger).
211 * Original copy of the master netdev ethtool_ops
213 const struct ethtool_ops *orig_ethtool_ops;
216 * Original copy of the master netdev net_device_ops
218 const struct net_device_ops *orig_ndo_ops;
223 /* TODO: ideally DSA ports would have a single dp->link_dp member,
224 * and no dst->rtable nor this struct dsa_link would be needed,
225 * but this would require some more complex tree walking,
226 * so keep it stupid at the moment and list them all.
230 struct dsa_port *link_dp;
231 struct list_head list;
240 * Parent switch tree, and switch index.
242 struct dsa_switch_tree *dst;
245 /* Listener for switch fabric events */
246 struct notifier_block nb;
249 * Give the switch driver somewhere to hang its private data
255 * Configuration data for this switch.
257 struct dsa_chip_data *cd;
260 * The switch operations.
262 const struct dsa_switch_ops *ops;
265 * Slave mii_bus and devices for the individual ports.
268 struct mii_bus *slave_mii_bus;
270 /* Ageing Time limits in msecs */
271 unsigned int ageing_time_min;
272 unsigned int ageing_time_max;
274 /* devlink used to represent this switch device */
275 struct devlink *devlink;
277 /* Number of switch port queues */
278 unsigned int num_tx_queues;
280 /* Disallow bridge core from requesting different VLAN awareness
281 * settings on ports if not hardware-supported
283 bool vlan_filtering_is_global;
285 /* In case vlan_filtering_is_global is set, the VLAN awareness state
286 * should be retrieved from here and not from the per-port settings.
290 /* MAC PCS does not provide link state change interrupt, and requires
291 * polling. Flag passed on to PHYLINK.
295 /* For switches that only have the MRU configurable. To ensure the
296 * configured MTU is not exceeded, normalization of MRU on all bridged
297 * interfaces is needed.
299 bool mtu_enforcement_ingress;
304 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
306 struct dsa_switch_tree *dst = ds->dst;
309 list_for_each_entry(dp, &dst->ports, list)
310 if (dp->ds == ds && dp->index == p)
316 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
318 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;
321 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
323 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;
326 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
328 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;
331 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
333 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;
336 static inline u32 dsa_user_ports(struct dsa_switch *ds)
341 for (p = 0; p < ds->num_ports; p++)
342 if (dsa_is_user_port(ds, p))
348 /* Return the local port used to reach an arbitrary switch device */
349 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device)
351 struct dsa_switch_tree *dst = ds->dst;
354 list_for_each_entry(dl, &dst->rtable, list)
355 if (dl->dp->ds == ds && dl->link_dp->ds->index == device)
356 return dl->dp->index;
358 return ds->num_ports;
361 /* Return the local port used to reach an arbitrary switch port */
362 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device,
365 if (device == ds->index)
368 return dsa_routing_port(ds, device);
371 /* Return the local port used to reach the dedicated CPU port */
372 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port)
374 const struct dsa_port *dp = dsa_to_port(ds, port);
375 const struct dsa_port *cpu_dp = dp->cpu_dp;
380 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index);
383 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp)
385 const struct dsa_switch *ds = dp->ds;
387 if (ds->vlan_filtering_is_global)
388 return ds->vlan_filtering;
390 return dp->vlan_filtering;
393 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
394 bool is_static, void *data);
395 struct dsa_switch_ops {
396 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
398 enum dsa_tag_protocol mprot);
400 int (*setup)(struct dsa_switch *ds);
401 void (*teardown)(struct dsa_switch *ds);
402 u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
405 * Access to the switch's PHY registers.
407 int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
408 int (*phy_write)(struct dsa_switch *ds, int port,
409 int regnum, u16 val);
412 * Link state adjustment (called from libphy)
414 void (*adjust_link)(struct dsa_switch *ds, int port,
415 struct phy_device *phydev);
416 void (*fixed_link_update)(struct dsa_switch *ds, int port,
417 struct fixed_phy_status *st);
420 * PHYLINK integration
422 void (*phylink_validate)(struct dsa_switch *ds, int port,
423 unsigned long *supported,
424 struct phylink_link_state *state);
425 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port,
426 struct phylink_link_state *state);
427 void (*phylink_mac_config)(struct dsa_switch *ds, int port,
429 const struct phylink_link_state *state);
430 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port);
431 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port,
433 phy_interface_t interface);
434 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port,
436 phy_interface_t interface,
437 struct phy_device *phydev,
438 int speed, int duplex,
439 bool tx_pause, bool rx_pause);
440 void (*phylink_fixed_state)(struct dsa_switch *ds, int port,
441 struct phylink_link_state *state);
443 * ethtool hardware statistics.
445 void (*get_strings)(struct dsa_switch *ds, int port,
446 u32 stringset, uint8_t *data);
447 void (*get_ethtool_stats)(struct dsa_switch *ds,
448 int port, uint64_t *data);
449 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset);
450 void (*get_ethtool_phy_stats)(struct dsa_switch *ds,
451 int port, uint64_t *data);
454 * ethtool Wake-on-LAN
456 void (*get_wol)(struct dsa_switch *ds, int port,
457 struct ethtool_wolinfo *w);
458 int (*set_wol)(struct dsa_switch *ds, int port,
459 struct ethtool_wolinfo *w);
462 * ethtool timestamp info
464 int (*get_ts_info)(struct dsa_switch *ds, int port,
465 struct ethtool_ts_info *ts);
470 int (*suspend)(struct dsa_switch *ds);
471 int (*resume)(struct dsa_switch *ds);
474 * Port enable/disable
476 int (*port_enable)(struct dsa_switch *ds, int port,
477 struct phy_device *phy);
478 void (*port_disable)(struct dsa_switch *ds, int port);
481 * Port's MAC EEE settings
483 int (*set_mac_eee)(struct dsa_switch *ds, int port,
484 struct ethtool_eee *e);
485 int (*get_mac_eee)(struct dsa_switch *ds, int port,
486 struct ethtool_eee *e);
489 int (*get_eeprom_len)(struct dsa_switch *ds);
490 int (*get_eeprom)(struct dsa_switch *ds,
491 struct ethtool_eeprom *eeprom, u8 *data);
492 int (*set_eeprom)(struct dsa_switch *ds,
493 struct ethtool_eeprom *eeprom, u8 *data);
498 int (*get_regs_len)(struct dsa_switch *ds, int port);
499 void (*get_regs)(struct dsa_switch *ds, int port,
500 struct ethtool_regs *regs, void *p);
505 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
506 int (*port_bridge_join)(struct dsa_switch *ds, int port,
507 struct net_device *bridge);
508 void (*port_bridge_leave)(struct dsa_switch *ds, int port,
509 struct net_device *bridge);
510 void (*port_stp_state_set)(struct dsa_switch *ds, int port,
512 void (*port_fast_age)(struct dsa_switch *ds, int port);
513 int (*port_egress_floods)(struct dsa_switch *ds, int port,
514 bool unicast, bool multicast);
519 int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
520 bool vlan_filtering);
521 int (*port_vlan_prepare)(struct dsa_switch *ds, int port,
522 const struct switchdev_obj_port_vlan *vlan);
523 void (*port_vlan_add)(struct dsa_switch *ds, int port,
524 const struct switchdev_obj_port_vlan *vlan);
525 int (*port_vlan_del)(struct dsa_switch *ds, int port,
526 const struct switchdev_obj_port_vlan *vlan);
528 * Forwarding database
530 int (*port_fdb_add)(struct dsa_switch *ds, int port,
531 const unsigned char *addr, u16 vid);
532 int (*port_fdb_del)(struct dsa_switch *ds, int port,
533 const unsigned char *addr, u16 vid);
534 int (*port_fdb_dump)(struct dsa_switch *ds, int port,
535 dsa_fdb_dump_cb_t *cb, void *data);
540 int (*port_mdb_prepare)(struct dsa_switch *ds, int port,
541 const struct switchdev_obj_port_mdb *mdb);
542 void (*port_mdb_add)(struct dsa_switch *ds, int port,
543 const struct switchdev_obj_port_mdb *mdb);
544 int (*port_mdb_del)(struct dsa_switch *ds, int port,
545 const struct switchdev_obj_port_mdb *mdb);
549 int (*get_rxnfc)(struct dsa_switch *ds, int port,
550 struct ethtool_rxnfc *nfc, u32 *rule_locs);
551 int (*set_rxnfc)(struct dsa_switch *ds, int port,
552 struct ethtool_rxnfc *nfc);
557 int (*cls_flower_add)(struct dsa_switch *ds, int port,
558 struct flow_cls_offload *cls, bool ingress);
559 int (*cls_flower_del)(struct dsa_switch *ds, int port,
560 struct flow_cls_offload *cls, bool ingress);
561 int (*cls_flower_stats)(struct dsa_switch *ds, int port,
562 struct flow_cls_offload *cls, bool ingress);
563 int (*port_mirror_add)(struct dsa_switch *ds, int port,
564 struct dsa_mall_mirror_tc_entry *mirror,
566 void (*port_mirror_del)(struct dsa_switch *ds, int port,
567 struct dsa_mall_mirror_tc_entry *mirror);
568 int (*port_policer_add)(struct dsa_switch *ds, int port,
569 struct dsa_mall_policer_tc_entry *policer);
570 void (*port_policer_del)(struct dsa_switch *ds, int port);
571 int (*port_setup_tc)(struct dsa_switch *ds, int port,
572 enum tc_setup_type type, void *type_data);
575 * Cross-chip operations
577 int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index,
578 int port, struct net_device *br);
579 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index,
580 int port, struct net_device *br);
585 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port,
587 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port,
589 bool (*port_txtstamp)(struct dsa_switch *ds, int port,
590 struct sk_buff *clone, unsigned int type);
591 bool (*port_rxtstamp)(struct dsa_switch *ds, int port,
592 struct sk_buff *skb, unsigned int type);
594 /* Devlink parameters */
595 int (*devlink_param_get)(struct dsa_switch *ds, u32 id,
596 struct devlink_param_gset_ctx *ctx);
597 int (*devlink_param_set)(struct dsa_switch *ds, u32 id,
598 struct devlink_param_gset_ctx *ctx);
601 * MTU change functionality. Switches can also adjust their MRU through
602 * this method. By MTU, one understands the SDU (L2 payload) length.
603 * If the switch needs to account for the DSA tag on the CPU port, this
604 * method needs to to do so privately.
606 int (*port_change_mtu)(struct dsa_switch *ds, int port,
608 int (*port_max_mtu)(struct dsa_switch *ds, int port);
611 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \
612 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \
613 dsa_devlink_param_get, dsa_devlink_param_set, NULL)
615 int dsa_devlink_param_get(struct devlink *dl, u32 id,
616 struct devlink_param_gset_ctx *ctx);
617 int dsa_devlink_param_set(struct devlink *dl, u32 id,
618 struct devlink_param_gset_ctx *ctx);
619 int dsa_devlink_params_register(struct dsa_switch *ds,
620 const struct devlink_param *params,
621 size_t params_count);
622 void dsa_devlink_params_unregister(struct dsa_switch *ds,
623 const struct devlink_param *params,
624 size_t params_count);
625 int dsa_devlink_resource_register(struct dsa_switch *ds,
626 const char *resource_name,
629 u64 parent_resource_id,
630 const struct devlink_resource_size_params *size_params);
632 void dsa_devlink_resources_unregister(struct dsa_switch *ds);
634 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds,
636 devlink_resource_occ_get_t *occ_get,
638 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds,
641 struct dsa_devlink_priv {
642 struct dsa_switch *ds;
645 struct dsa_switch_driver {
646 struct list_head list;
647 const struct dsa_switch_ops *ops;
650 struct net_device *dsa_dev_to_net_device(struct device *dev);
652 /* Keep inline for faster access in hot path */
653 static inline bool netdev_uses_dsa(struct net_device *dev)
655 #if IS_ENABLED(CONFIG_NET_DSA)
656 return dev->dsa_ptr && dev->dsa_ptr->rcv;
661 static inline bool dsa_can_decode(const struct sk_buff *skb,
662 struct net_device *dev)
664 #if IS_ENABLED(CONFIG_NET_DSA)
665 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev);
670 void dsa_unregister_switch(struct dsa_switch *ds);
671 int dsa_register_switch(struct dsa_switch *ds);
672 #ifdef CONFIG_PM_SLEEP
673 int dsa_switch_suspend(struct dsa_switch *ds);
674 int dsa_switch_resume(struct dsa_switch *ds);
676 static inline int dsa_switch_suspend(struct dsa_switch *ds)
680 static inline int dsa_switch_resume(struct dsa_switch *ds)
684 #endif /* CONFIG_PM_SLEEP */
686 enum dsa_notifier_type {
691 struct dsa_notifier_info {
692 struct net_device *dev;
695 struct dsa_notifier_register_info {
696 struct dsa_notifier_info info; /* must be first */
697 struct net_device *master;
698 unsigned int port_number;
699 unsigned int switch_number;
702 static inline struct net_device *
703 dsa_notifier_info_to_dev(const struct dsa_notifier_info *info)
708 #if IS_ENABLED(CONFIG_NET_DSA)
709 int register_dsa_notifier(struct notifier_block *nb);
710 int unregister_dsa_notifier(struct notifier_block *nb);
711 int call_dsa_notifiers(unsigned long val, struct net_device *dev,
712 struct dsa_notifier_info *info);
714 static inline int register_dsa_notifier(struct notifier_block *nb)
719 static inline int unregister_dsa_notifier(struct notifier_block *nb)
724 static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev,
725 struct dsa_notifier_info *info)
731 /* Broadcom tag specific helpers to insert and extract queue/port number */
732 #define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q)
733 #define BRCM_TAG_GET_PORT(v) ((v) >> 8)
734 #define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff)
737 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev);
738 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data);
739 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data);
740 int dsa_port_get_phy_sset_count(struct dsa_port *dp);
741 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up);
743 struct dsa_tag_driver {
744 const struct dsa_device_ops *ops;
745 struct list_head list;
746 struct module *owner;
749 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[],
751 struct module *owner);
752 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[],
755 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \
756 static int __init dsa_tag_driver_module_init(void) \
758 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \
762 module_init(dsa_tag_driver_module_init); \
764 static void __exit dsa_tag_driver_module_exit(void) \
766 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \
768 module_exit(dsa_tag_driver_module_exit)
771 * module_dsa_tag_drivers() - Helper macro for registering DSA tag
773 * @__ops_array: Array of tag driver strucutres
775 * Helper macro for DSA tag drivers which do not do anything special
776 * in module init/exit. Each module may only use this macro once, and
777 * calling it replaces module_init() and module_exit().
779 #define module_dsa_tag_drivers(__ops_array) \
780 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array))
782 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops
784 /* Create a static structure we can build a linked list of dsa_tag
787 #define DSA_TAG_DRIVER(__ops) \
788 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \
793 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag
795 * @__ops: Single tag driver structures
797 * Helper macro for DSA tag drivers which do not do anything special
798 * in module init/exit. Each module may only use this macro once, and
799 * calling it replaces module_init() and module_exit().
801 #define module_dsa_tag_driver(__ops) \
802 DSA_TAG_DRIVER(__ops); \
804 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \
805 &DSA_TAG_DRIVER_NAME(__ops) \
807 module_dsa_tag_drivers(dsa_tag_driver_array)