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
47 #define DSA_TAG_PROTO_RTL4_A_VALUE 17
49 enum dsa_tag_protocol {
50 DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE,
51 DSA_TAG_PROTO_BRCM = DSA_TAG_PROTO_BRCM_VALUE,
52 DSA_TAG_PROTO_BRCM_PREPEND = DSA_TAG_PROTO_BRCM_PREPEND_VALUE,
53 DSA_TAG_PROTO_DSA = DSA_TAG_PROTO_DSA_VALUE,
54 DSA_TAG_PROTO_EDSA = DSA_TAG_PROTO_EDSA_VALUE,
55 DSA_TAG_PROTO_GSWIP = DSA_TAG_PROTO_GSWIP_VALUE,
56 DSA_TAG_PROTO_KSZ9477 = DSA_TAG_PROTO_KSZ9477_VALUE,
57 DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE,
58 DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE,
59 DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE,
60 DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE,
61 DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE,
62 DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE,
63 DSA_TAG_PROTO_SJA1105 = DSA_TAG_PROTO_SJA1105_VALUE,
64 DSA_TAG_PROTO_KSZ8795 = DSA_TAG_PROTO_KSZ8795_VALUE,
65 DSA_TAG_PROTO_OCELOT = DSA_TAG_PROTO_OCELOT_VALUE,
66 DSA_TAG_PROTO_AR9331 = DSA_TAG_PROTO_AR9331_VALUE,
67 DSA_TAG_PROTO_RTL4_A = DSA_TAG_PROTO_RTL4_A_VALUE,
73 struct dsa_device_ops {
74 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
75 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
76 struct packet_type *pt);
77 void (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
79 /* Used to determine which traffic should match the DSA filter in
80 * eth_type_trans, and which, if any, should bypass it and be processed
81 * as regular on the master net device.
83 bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
84 unsigned int overhead;
86 enum dsa_tag_protocol proto;
87 /* Some tagging protocols either mangle or shift the destination MAC
88 * address, in which case the DSA master would drop packets on ingress
89 * if what it understands out of the destination MAC address is not in
92 bool promisc_on_master;
96 /* This structure defines the control interfaces that are overlayed by the
97 * DSA layer on top of the DSA CPU/management net_device instance. This is
98 * used by the core net_device layer while calling various net_device_ops
101 struct dsa_netdevice_ops {
102 int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr,
106 #define DSA_TAG_DRIVER_ALIAS "dsa_tag-"
107 #define MODULE_ALIAS_DSA_TAG_DRIVER(__proto) \
108 MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE))
111 struct sk_buff *clone;
114 struct __dsa_skb_cb {
115 struct dsa_skb_cb cb;
116 u8 priv[48 - sizeof(struct dsa_skb_cb)];
119 #define DSA_SKB_CB(skb) ((struct dsa_skb_cb *)((skb)->cb))
121 #define DSA_SKB_CB_PRIV(skb) \
122 ((void *)(skb)->cb + offsetof(struct __dsa_skb_cb, priv))
124 struct dsa_switch_tree {
125 struct list_head list;
127 /* Notifier chain for switch-wide events */
128 struct raw_notifier_head nh;
130 /* Tree identifier */
133 /* Number of switches attached to this tree */
134 struct kref refcount;
136 /* Has this tree been applied to the hardware? */
140 * Configuration data for the platform device that owns
141 * this dsa switch tree instance.
143 struct dsa_platform_data *pd;
145 /* List of switch ports */
146 struct list_head ports;
148 /* List of DSA links composing the routing table */
149 struct list_head rtable;
152 /* TC matchall action types */
153 enum dsa_port_mall_action_type {
154 DSA_PORT_MALL_MIRROR,
155 DSA_PORT_MALL_POLICER,
158 /* TC mirroring entry */
159 struct dsa_mall_mirror_tc_entry {
164 /* TC port policer entry */
165 struct dsa_mall_policer_tc_entry {
167 u64 rate_bytes_per_sec;
170 /* TC matchall entry */
171 struct dsa_mall_tc_entry {
172 struct list_head list;
173 unsigned long cookie;
174 enum dsa_port_mall_action_type type;
176 struct dsa_mall_mirror_tc_entry mirror;
177 struct dsa_mall_policer_tc_entry policer;
183 /* A CPU port is physically connected to a master device.
184 * A user port exposed to userspace has a slave device.
187 struct net_device *master;
188 struct net_device *slave;
191 /* CPU port tagging operations used by master or slave devices */
192 const struct dsa_device_ops *tag_ops;
194 /* Copies for faster access in master receive hot path */
195 struct dsa_switch_tree *dst;
196 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
197 struct packet_type *pt);
198 bool (*filter)(const struct sk_buff *skb, struct net_device *dev);
201 DSA_PORT_TYPE_UNUSED = 0,
207 struct dsa_switch *ds;
210 struct dsa_port *cpu_dp;
212 struct device_node *dn;
213 unsigned int ageing_time;
216 struct net_device *bridge_dev;
217 struct devlink_port devlink_port;
218 bool devlink_port_setup;
220 struct phylink_config pl_config;
222 struct list_head list;
225 * Give the switch driver somewhere to hang its per-port private data
226 * structures (accessible from the tagger).
231 * Original copy of the master netdev ethtool_ops
233 const struct ethtool_ops *orig_ethtool_ops;
236 * Original copy of the master netdev net_device_ops
238 const struct dsa_netdevice_ops *netdev_ops;
243 /* TODO: ideally DSA ports would have a single dp->link_dp member,
244 * and no dst->rtable nor this struct dsa_link would be needed,
245 * but this would require some more complex tree walking,
246 * so keep it stupid at the moment and list them all.
250 struct dsa_port *link_dp;
251 struct list_head list;
260 * Parent switch tree, and switch index.
262 struct dsa_switch_tree *dst;
265 /* Listener for switch fabric events */
266 struct notifier_block nb;
269 * Give the switch driver somewhere to hang its private data
275 * Configuration data for this switch.
277 struct dsa_chip_data *cd;
280 * The switch operations.
282 const struct dsa_switch_ops *ops;
285 * Slave mii_bus and devices for the individual ports.
288 struct mii_bus *slave_mii_bus;
290 /* Ageing Time limits in msecs */
291 unsigned int ageing_time_min;
292 unsigned int ageing_time_max;
294 /* devlink used to represent this switch device */
295 struct devlink *devlink;
297 /* Number of switch port queues */
298 unsigned int num_tx_queues;
300 /* Disallow bridge core from requesting different VLAN awareness
301 * settings on ports if not hardware-supported
303 bool vlan_filtering_is_global;
305 /* Pass .port_vlan_add and .port_vlan_del to drivers even for bridges
306 * that have vlan_filtering=0. All drivers should ideally set this (and
307 * then the option would get removed), but it is unknown whether this
308 * would break things or not.
310 bool configure_vlan_while_not_filtering;
312 /* If the switch driver always programs the CPU port as egress tagged
313 * despite the VLAN configuration indicating otherwise, then setting
314 * @untag_bridge_pvid will force the DSA receive path to pop the bridge's
315 * default_pvid VLAN tagged frames to offer a consistent behavior
316 * between a vlan_filtering=0 and vlan_filtering=1 bridge device.
318 bool untag_bridge_pvid;
320 /* In case vlan_filtering_is_global is set, the VLAN awareness state
321 * should be retrieved from here and not from the per-port settings.
325 /* MAC PCS does not provide link state change interrupt, and requires
326 * polling. Flag passed on to PHYLINK.
330 /* For switches that only have the MRU configurable. To ensure the
331 * configured MTU is not exceeded, normalization of MRU on all bridged
332 * interfaces is needed.
334 bool mtu_enforcement_ingress;
339 static inline struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
341 struct dsa_switch_tree *dst = ds->dst;
344 list_for_each_entry(dp, &dst->ports, list)
345 if (dp->ds == ds && dp->index == p)
351 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
353 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;
356 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
358 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;
361 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
363 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;
366 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
368 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;
371 static inline u32 dsa_user_ports(struct dsa_switch *ds)
376 for (p = 0; p < ds->num_ports; p++)
377 if (dsa_is_user_port(ds, p))
383 /* Return the local port used to reach an arbitrary switch device */
384 static inline unsigned int dsa_routing_port(struct dsa_switch *ds, int device)
386 struct dsa_switch_tree *dst = ds->dst;
389 list_for_each_entry(dl, &dst->rtable, list)
390 if (dl->dp->ds == ds && dl->link_dp->ds->index == device)
391 return dl->dp->index;
393 return ds->num_ports;
396 /* Return the local port used to reach an arbitrary switch port */
397 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device,
400 if (device == ds->index)
403 return dsa_routing_port(ds, device);
406 /* Return the local port used to reach the dedicated CPU port */
407 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port)
409 const struct dsa_port *dp = dsa_to_port(ds, port);
410 const struct dsa_port *cpu_dp = dp->cpu_dp;
415 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index);
418 static inline bool dsa_port_is_vlan_filtering(const struct dsa_port *dp)
420 const struct dsa_switch *ds = dp->ds;
422 if (ds->vlan_filtering_is_global)
423 return ds->vlan_filtering;
425 return dp->vlan_filtering;
428 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
429 bool is_static, void *data);
430 struct dsa_switch_ops {
431 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
433 enum dsa_tag_protocol mprot);
435 int (*setup)(struct dsa_switch *ds);
436 void (*teardown)(struct dsa_switch *ds);
437 u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
440 * Access to the switch's PHY registers.
442 int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
443 int (*phy_write)(struct dsa_switch *ds, int port,
444 int regnum, u16 val);
447 * Link state adjustment (called from libphy)
449 void (*adjust_link)(struct dsa_switch *ds, int port,
450 struct phy_device *phydev);
451 void (*fixed_link_update)(struct dsa_switch *ds, int port,
452 struct fixed_phy_status *st);
455 * PHYLINK integration
457 void (*phylink_validate)(struct dsa_switch *ds, int port,
458 unsigned long *supported,
459 struct phylink_link_state *state);
460 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port,
461 struct phylink_link_state *state);
462 void (*phylink_mac_config)(struct dsa_switch *ds, int port,
464 const struct phylink_link_state *state);
465 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port);
466 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port,
468 phy_interface_t interface);
469 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port,
471 phy_interface_t interface,
472 struct phy_device *phydev,
473 int speed, int duplex,
474 bool tx_pause, bool rx_pause);
475 void (*phylink_fixed_state)(struct dsa_switch *ds, int port,
476 struct phylink_link_state *state);
478 * ethtool hardware statistics.
480 void (*get_strings)(struct dsa_switch *ds, int port,
481 u32 stringset, uint8_t *data);
482 void (*get_ethtool_stats)(struct dsa_switch *ds,
483 int port, uint64_t *data);
484 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset);
485 void (*get_ethtool_phy_stats)(struct dsa_switch *ds,
486 int port, uint64_t *data);
489 * ethtool Wake-on-LAN
491 void (*get_wol)(struct dsa_switch *ds, int port,
492 struct ethtool_wolinfo *w);
493 int (*set_wol)(struct dsa_switch *ds, int port,
494 struct ethtool_wolinfo *w);
497 * ethtool timestamp info
499 int (*get_ts_info)(struct dsa_switch *ds, int port,
500 struct ethtool_ts_info *ts);
505 int (*suspend)(struct dsa_switch *ds);
506 int (*resume)(struct dsa_switch *ds);
509 * Port enable/disable
511 int (*port_enable)(struct dsa_switch *ds, int port,
512 struct phy_device *phy);
513 void (*port_disable)(struct dsa_switch *ds, int port);
516 * Port's MAC EEE settings
518 int (*set_mac_eee)(struct dsa_switch *ds, int port,
519 struct ethtool_eee *e);
520 int (*get_mac_eee)(struct dsa_switch *ds, int port,
521 struct ethtool_eee *e);
524 int (*get_eeprom_len)(struct dsa_switch *ds);
525 int (*get_eeprom)(struct dsa_switch *ds,
526 struct ethtool_eeprom *eeprom, u8 *data);
527 int (*set_eeprom)(struct dsa_switch *ds,
528 struct ethtool_eeprom *eeprom, u8 *data);
533 int (*get_regs_len)(struct dsa_switch *ds, int port);
534 void (*get_regs)(struct dsa_switch *ds, int port,
535 struct ethtool_regs *regs, void *p);
540 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
541 int (*port_bridge_join)(struct dsa_switch *ds, int port,
542 struct net_device *bridge);
543 void (*port_bridge_leave)(struct dsa_switch *ds, int port,
544 struct net_device *bridge);
545 void (*port_stp_state_set)(struct dsa_switch *ds, int port,
547 void (*port_fast_age)(struct dsa_switch *ds, int port);
548 int (*port_egress_floods)(struct dsa_switch *ds, int port,
549 bool unicast, bool multicast);
554 int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
555 bool vlan_filtering);
556 int (*port_vlan_prepare)(struct dsa_switch *ds, int port,
557 const struct switchdev_obj_port_vlan *vlan);
558 void (*port_vlan_add)(struct dsa_switch *ds, int port,
559 const struct switchdev_obj_port_vlan *vlan);
560 int (*port_vlan_del)(struct dsa_switch *ds, int port,
561 const struct switchdev_obj_port_vlan *vlan);
563 * Forwarding database
565 int (*port_fdb_add)(struct dsa_switch *ds, int port,
566 const unsigned char *addr, u16 vid);
567 int (*port_fdb_del)(struct dsa_switch *ds, int port,
568 const unsigned char *addr, u16 vid);
569 int (*port_fdb_dump)(struct dsa_switch *ds, int port,
570 dsa_fdb_dump_cb_t *cb, void *data);
575 int (*port_mdb_prepare)(struct dsa_switch *ds, int port,
576 const struct switchdev_obj_port_mdb *mdb);
577 void (*port_mdb_add)(struct dsa_switch *ds, int port,
578 const struct switchdev_obj_port_mdb *mdb);
579 int (*port_mdb_del)(struct dsa_switch *ds, int port,
580 const struct switchdev_obj_port_mdb *mdb);
584 int (*get_rxnfc)(struct dsa_switch *ds, int port,
585 struct ethtool_rxnfc *nfc, u32 *rule_locs);
586 int (*set_rxnfc)(struct dsa_switch *ds, int port,
587 struct ethtool_rxnfc *nfc);
592 int (*cls_flower_add)(struct dsa_switch *ds, int port,
593 struct flow_cls_offload *cls, bool ingress);
594 int (*cls_flower_del)(struct dsa_switch *ds, int port,
595 struct flow_cls_offload *cls, bool ingress);
596 int (*cls_flower_stats)(struct dsa_switch *ds, int port,
597 struct flow_cls_offload *cls, bool ingress);
598 int (*port_mirror_add)(struct dsa_switch *ds, int port,
599 struct dsa_mall_mirror_tc_entry *mirror,
601 void (*port_mirror_del)(struct dsa_switch *ds, int port,
602 struct dsa_mall_mirror_tc_entry *mirror);
603 int (*port_policer_add)(struct dsa_switch *ds, int port,
604 struct dsa_mall_policer_tc_entry *policer);
605 void (*port_policer_del)(struct dsa_switch *ds, int port);
606 int (*port_setup_tc)(struct dsa_switch *ds, int port,
607 enum tc_setup_type type, void *type_data);
610 * Cross-chip operations
612 int (*crosschip_bridge_join)(struct dsa_switch *ds, int tree_index,
613 int sw_index, int port,
614 struct net_device *br);
615 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int tree_index,
616 int sw_index, int port,
617 struct net_device *br);
622 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port,
624 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port,
626 bool (*port_txtstamp)(struct dsa_switch *ds, int port,
627 struct sk_buff *clone, unsigned int type);
628 bool (*port_rxtstamp)(struct dsa_switch *ds, int port,
629 struct sk_buff *skb, unsigned int type);
631 /* Devlink parameters, etc */
632 int (*devlink_param_get)(struct dsa_switch *ds, u32 id,
633 struct devlink_param_gset_ctx *ctx);
634 int (*devlink_param_set)(struct dsa_switch *ds, u32 id,
635 struct devlink_param_gset_ctx *ctx);
636 int (*devlink_info_get)(struct dsa_switch *ds,
637 struct devlink_info_req *req,
638 struct netlink_ext_ack *extack);
641 * MTU change functionality. Switches can also adjust their MRU through
642 * this method. By MTU, one understands the SDU (L2 payload) length.
643 * If the switch needs to account for the DSA tag on the CPU port, this
644 * method needs to do so privately.
646 int (*port_change_mtu)(struct dsa_switch *ds, int port,
648 int (*port_max_mtu)(struct dsa_switch *ds, int port);
651 #define DSA_DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes) \
652 DEVLINK_PARAM_DRIVER(_id, _name, _type, _cmodes, \
653 dsa_devlink_param_get, dsa_devlink_param_set, NULL)
655 int dsa_devlink_param_get(struct devlink *dl, u32 id,
656 struct devlink_param_gset_ctx *ctx);
657 int dsa_devlink_param_set(struct devlink *dl, u32 id,
658 struct devlink_param_gset_ctx *ctx);
659 int dsa_devlink_params_register(struct dsa_switch *ds,
660 const struct devlink_param *params,
661 size_t params_count);
662 void dsa_devlink_params_unregister(struct dsa_switch *ds,
663 const struct devlink_param *params,
664 size_t params_count);
665 int dsa_devlink_resource_register(struct dsa_switch *ds,
666 const char *resource_name,
669 u64 parent_resource_id,
670 const struct devlink_resource_size_params *size_params);
672 void dsa_devlink_resources_unregister(struct dsa_switch *ds);
674 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds,
676 devlink_resource_occ_get_t *occ_get,
678 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds,
680 struct devlink_region *
681 dsa_devlink_region_create(struct dsa_switch *ds,
682 const struct devlink_region_ops *ops,
683 u32 region_max_snapshots, u64 region_size);
684 void dsa_devlink_region_destroy(struct devlink_region *region);
686 struct dsa_port *dsa_port_from_netdev(struct net_device *netdev);
688 struct dsa_devlink_priv {
689 struct dsa_switch *ds;
692 static inline struct dsa_switch *dsa_devlink_to_ds(struct devlink *dl)
694 struct dsa_devlink_priv *dl_priv = devlink_priv(dl);
699 struct dsa_switch_driver {
700 struct list_head list;
701 const struct dsa_switch_ops *ops;
704 struct net_device *dsa_dev_to_net_device(struct device *dev);
706 /* Keep inline for faster access in hot path */
707 static inline bool netdev_uses_dsa(const struct net_device *dev)
709 #if IS_ENABLED(CONFIG_NET_DSA)
710 return dev->dsa_ptr && dev->dsa_ptr->rcv;
715 static inline bool dsa_can_decode(const struct sk_buff *skb,
716 struct net_device *dev)
718 #if IS_ENABLED(CONFIG_NET_DSA)
719 return !dev->dsa_ptr->filter || dev->dsa_ptr->filter(skb, dev);
724 /* All DSA tags that push the EtherType to the right (basically all except tail
725 * tags, which don't break dissection) can be treated the same from the
726 * perspective of the flow dissector.
729 * - offset: the (B - A) difference between:
730 * A. the position of the real EtherType and
731 * B. the current skb->data (aka ETH_HLEN bytes into the frame, aka 2 bytes
732 * after the normal EtherType was supposed to be)
733 * The offset in bytes is exactly equal to the tagger overhead (and half of
734 * that, in __be16 shorts).
736 * - proto: the value of the real EtherType.
738 static inline void dsa_tag_generic_flow_dissect(const struct sk_buff *skb,
739 __be16 *proto, int *offset)
741 #if IS_ENABLED(CONFIG_NET_DSA)
742 const struct dsa_device_ops *ops = skb->dev->dsa_ptr->tag_ops;
743 int tag_len = ops->overhead;
746 *proto = ((__be16 *)skb->data)[(tag_len / 2) - 1];
750 #if IS_ENABLED(CONFIG_NET_DSA)
751 static inline int __dsa_netdevice_ops_check(struct net_device *dev)
753 int err = -EOPNOTSUPP;
758 if (!dev->dsa_ptr->netdev_ops)
764 static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr,
767 const struct dsa_netdevice_ops *ops;
770 err = __dsa_netdevice_ops_check(dev);
774 ops = dev->dsa_ptr->netdev_ops;
776 return ops->ndo_do_ioctl(dev, ifr, cmd);
779 static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr,
786 void dsa_unregister_switch(struct dsa_switch *ds);
787 int dsa_register_switch(struct dsa_switch *ds);
788 struct dsa_switch *dsa_switch_find(int tree_index, int sw_index);
789 #ifdef CONFIG_PM_SLEEP
790 int dsa_switch_suspend(struct dsa_switch *ds);
791 int dsa_switch_resume(struct dsa_switch *ds);
793 static inline int dsa_switch_suspend(struct dsa_switch *ds)
797 static inline int dsa_switch_resume(struct dsa_switch *ds)
801 #endif /* CONFIG_PM_SLEEP */
803 enum dsa_notifier_type {
808 struct dsa_notifier_info {
809 struct net_device *dev;
812 struct dsa_notifier_register_info {
813 struct dsa_notifier_info info; /* must be first */
814 struct net_device *master;
815 unsigned int port_number;
816 unsigned int switch_number;
819 static inline struct net_device *
820 dsa_notifier_info_to_dev(const struct dsa_notifier_info *info)
825 #if IS_ENABLED(CONFIG_NET_DSA)
826 int register_dsa_notifier(struct notifier_block *nb);
827 int unregister_dsa_notifier(struct notifier_block *nb);
828 int call_dsa_notifiers(unsigned long val, struct net_device *dev,
829 struct dsa_notifier_info *info);
831 static inline int register_dsa_notifier(struct notifier_block *nb)
836 static inline int unregister_dsa_notifier(struct notifier_block *nb)
841 static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev,
842 struct dsa_notifier_info *info)
848 /* Broadcom tag specific helpers to insert and extract queue/port number */
849 #define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q)
850 #define BRCM_TAG_GET_PORT(v) ((v) >> 8)
851 #define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff)
854 netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev);
855 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data);
856 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data);
857 int dsa_port_get_phy_sset_count(struct dsa_port *dp);
858 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up);
860 struct dsa_tag_driver {
861 const struct dsa_device_ops *ops;
862 struct list_head list;
863 struct module *owner;
866 void dsa_tag_drivers_register(struct dsa_tag_driver *dsa_tag_driver_array[],
868 struct module *owner);
869 void dsa_tag_drivers_unregister(struct dsa_tag_driver *dsa_tag_driver_array[],
872 #define dsa_tag_driver_module_drivers(__dsa_tag_drivers_array, __count) \
873 static int __init dsa_tag_driver_module_init(void) \
875 dsa_tag_drivers_register(__dsa_tag_drivers_array, __count, \
879 module_init(dsa_tag_driver_module_init); \
881 static void __exit dsa_tag_driver_module_exit(void) \
883 dsa_tag_drivers_unregister(__dsa_tag_drivers_array, __count); \
885 module_exit(dsa_tag_driver_module_exit)
888 * module_dsa_tag_drivers() - Helper macro for registering DSA tag
890 * @__ops_array: Array of tag driver strucutres
892 * Helper macro for DSA tag drivers which do not do anything special
893 * in module init/exit. Each module may only use this macro once, and
894 * calling it replaces module_init() and module_exit().
896 #define module_dsa_tag_drivers(__ops_array) \
897 dsa_tag_driver_module_drivers(__ops_array, ARRAY_SIZE(__ops_array))
899 #define DSA_TAG_DRIVER_NAME(__ops) dsa_tag_driver ## _ ## __ops
901 /* Create a static structure we can build a linked list of dsa_tag
904 #define DSA_TAG_DRIVER(__ops) \
905 static struct dsa_tag_driver DSA_TAG_DRIVER_NAME(__ops) = { \
910 * module_dsa_tag_driver() - Helper macro for registering a single DSA tag
912 * @__ops: Single tag driver structures
914 * Helper macro for DSA tag drivers which do not do anything special
915 * in module init/exit. Each module may only use this macro once, and
916 * calling it replaces module_init() and module_exit().
918 #define module_dsa_tag_driver(__ops) \
919 DSA_TAG_DRIVER(__ops); \
921 static struct dsa_tag_driver *dsa_tag_driver_array[] = { \
922 &DSA_TAG_DRIVER_NAME(__ops) \
924 module_dsa_tag_drivers(dsa_tag_driver_array)