2 * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
3 * Copyright (c) 2008-2009 Marvell Semiconductor
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.
11 #ifndef __LINUX_NET_DSA_H
12 #define __LINUX_NET_DSA_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>
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>
30 struct fixed_phy_status;
31 struct phylink_link_state;
33 enum dsa_tag_protocol {
34 DSA_TAG_PROTO_NONE = 0,
36 DSA_TAG_PROTO_BRCM_PREPEND,
40 DSA_TAG_PROTO_KSZ9477,
41 DSA_TAG_PROTO_KSZ9893,
42 DSA_TAG_PROTO_LAN9303,
45 DSA_TAG_PROTO_TRAILER,
46 DSA_TAG_LAST, /* MUST BE LAST */
52 struct dsa_device_ops {
53 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
54 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
55 struct packet_type *pt);
56 int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
58 unsigned int overhead;
61 struct dsa_switch_tree {
62 struct list_head list;
64 /* Notifier chain for switch-wide events */
65 struct raw_notifier_head nh;
70 /* Number of switches attached to this tree */
73 /* Has this tree been applied to the hardware? */
77 * Configuration data for the platform device that owns
78 * this dsa switch tree instance.
80 struct dsa_platform_data *pd;
83 * The switch port to which the CPU is attached.
85 struct dsa_port *cpu_dp;
88 * Data for the individual switch chips.
90 struct dsa_switch *ds[DSA_MAX_SWITCHES];
93 /* TC matchall action types, only mirroring for now */
94 enum dsa_port_mall_action_type {
98 /* TC mirroring entry */
99 struct dsa_mall_mirror_tc_entry {
104 /* TC matchall entry */
105 struct dsa_mall_tc_entry {
106 struct list_head list;
107 unsigned long cookie;
108 enum dsa_port_mall_action_type type;
110 struct dsa_mall_mirror_tc_entry mirror;
116 /* A CPU port is physically connected to a master device.
117 * A user port exposed to userspace has a slave device.
120 struct net_device *master;
121 struct net_device *slave;
124 /* CPU port tagging operations used by master or slave devices */
125 const struct dsa_device_ops *tag_ops;
127 /* Copies for faster access in master receive hot path */
128 struct dsa_switch_tree *dst;
129 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
130 struct packet_type *pt);
133 DSA_PORT_TYPE_UNUSED = 0,
139 struct dsa_switch *ds;
142 const struct dsa_port *cpu_dp;
144 struct device_node *dn;
145 unsigned int ageing_time;
147 struct net_device *bridge_dev;
148 struct devlink_port devlink_port;
151 * Original copy of the master netdev ethtool_ops
153 const struct ethtool_ops *orig_ethtool_ops;
156 * Original copy of the master netdev net_device_ops
158 const struct net_device_ops *orig_ndo_ops;
165 * Parent switch tree, and switch index.
167 struct dsa_switch_tree *dst;
170 /* Listener for switch fabric events */
171 struct notifier_block nb;
174 * Give the switch driver somewhere to hang its private data
180 * Configuration data for this switch.
182 struct dsa_chip_data *cd;
185 * The switch operations.
187 const struct dsa_switch_ops *ops;
190 * An array of which element [a] indicates which port on this
191 * switch should be used to send packets to that are destined
192 * for switch a. Can be NULL if there is only one switch chip.
194 s8 rtable[DSA_MAX_SWITCHES];
197 * Slave mii_bus and devices for the individual ports.
200 struct mii_bus *slave_mii_bus;
202 /* Ageing Time limits in msecs */
203 unsigned int ageing_time_min;
204 unsigned int ageing_time_max;
206 /* devlink used to represent this switch device */
207 struct devlink *devlink;
209 /* Number of switch port queues */
210 unsigned int num_tx_queues;
212 unsigned long *bitmap;
213 unsigned long _bitmap;
215 /* Dynamically allocated ports, keep last */
217 struct dsa_port ports[];
220 static inline const struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
222 return &ds->ports[p];
225 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
227 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;
230 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
232 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;
235 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
237 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;
240 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
242 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;
245 static inline u32 dsa_user_ports(struct dsa_switch *ds)
250 for (p = 0; p < ds->num_ports; p++)
251 if (dsa_is_user_port(ds, p))
257 /* Return the local port used to reach an arbitrary switch port */
258 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device,
261 if (device == ds->index)
264 return ds->rtable[device];
267 /* Return the local port used to reach the dedicated CPU port */
268 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port)
270 const struct dsa_port *dp = dsa_to_port(ds, port);
271 const struct dsa_port *cpu_dp = dp->cpu_dp;
276 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index);
279 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
280 bool is_static, void *data);
281 struct dsa_switch_ops {
282 #if IS_ENABLED(CONFIG_NET_DSA_LEGACY)
286 const char *(*probe)(struct device *dsa_dev,
287 struct device *host_dev, int sw_addr,
291 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
294 int (*setup)(struct dsa_switch *ds);
295 u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
298 * Access to the switch's PHY registers.
300 int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
301 int (*phy_write)(struct dsa_switch *ds, int port,
302 int regnum, u16 val);
305 * Link state adjustment (called from libphy)
307 void (*adjust_link)(struct dsa_switch *ds, int port,
308 struct phy_device *phydev);
309 void (*fixed_link_update)(struct dsa_switch *ds, int port,
310 struct fixed_phy_status *st);
313 * PHYLINK integration
315 void (*phylink_validate)(struct dsa_switch *ds, int port,
316 unsigned long *supported,
317 struct phylink_link_state *state);
318 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port,
319 struct phylink_link_state *state);
320 void (*phylink_mac_config)(struct dsa_switch *ds, int port,
322 const struct phylink_link_state *state);
323 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port);
324 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port,
326 phy_interface_t interface);
327 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port,
329 phy_interface_t interface,
330 struct phy_device *phydev);
331 void (*phylink_fixed_state)(struct dsa_switch *ds, int port,
332 struct phylink_link_state *state);
334 * ethtool hardware statistics.
336 void (*get_strings)(struct dsa_switch *ds, int port,
337 u32 stringset, uint8_t *data);
338 void (*get_ethtool_stats)(struct dsa_switch *ds,
339 int port, uint64_t *data);
340 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset);
341 void (*get_ethtool_phy_stats)(struct dsa_switch *ds,
342 int port, uint64_t *data);
345 * ethtool Wake-on-LAN
347 void (*get_wol)(struct dsa_switch *ds, int port,
348 struct ethtool_wolinfo *w);
349 int (*set_wol)(struct dsa_switch *ds, int port,
350 struct ethtool_wolinfo *w);
353 * ethtool timestamp info
355 int (*get_ts_info)(struct dsa_switch *ds, int port,
356 struct ethtool_ts_info *ts);
361 int (*suspend)(struct dsa_switch *ds);
362 int (*resume)(struct dsa_switch *ds);
365 * Port enable/disable
367 int (*port_enable)(struct dsa_switch *ds, int port,
368 struct phy_device *phy);
369 void (*port_disable)(struct dsa_switch *ds, int port);
372 * Port's MAC EEE settings
374 int (*set_mac_eee)(struct dsa_switch *ds, int port,
375 struct ethtool_eee *e);
376 int (*get_mac_eee)(struct dsa_switch *ds, int port,
377 struct ethtool_eee *e);
380 int (*get_eeprom_len)(struct dsa_switch *ds);
381 int (*get_eeprom)(struct dsa_switch *ds,
382 struct ethtool_eeprom *eeprom, u8 *data);
383 int (*set_eeprom)(struct dsa_switch *ds,
384 struct ethtool_eeprom *eeprom, u8 *data);
389 int (*get_regs_len)(struct dsa_switch *ds, int port);
390 void (*get_regs)(struct dsa_switch *ds, int port,
391 struct ethtool_regs *regs, void *p);
396 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
397 int (*port_bridge_join)(struct dsa_switch *ds, int port,
398 struct net_device *bridge);
399 void (*port_bridge_leave)(struct dsa_switch *ds, int port,
400 struct net_device *bridge);
401 void (*port_stp_state_set)(struct dsa_switch *ds, int port,
403 void (*port_fast_age)(struct dsa_switch *ds, int port);
404 int (*port_egress_floods)(struct dsa_switch *ds, int port,
405 bool unicast, bool multicast);
410 int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
411 bool vlan_filtering);
412 int (*port_vlan_prepare)(struct dsa_switch *ds, int port,
413 const struct switchdev_obj_port_vlan *vlan);
414 void (*port_vlan_add)(struct dsa_switch *ds, int port,
415 const struct switchdev_obj_port_vlan *vlan);
416 int (*port_vlan_del)(struct dsa_switch *ds, int port,
417 const struct switchdev_obj_port_vlan *vlan);
419 * Forwarding database
421 int (*port_fdb_add)(struct dsa_switch *ds, int port,
422 const unsigned char *addr, u16 vid);
423 int (*port_fdb_del)(struct dsa_switch *ds, int port,
424 const unsigned char *addr, u16 vid);
425 int (*port_fdb_dump)(struct dsa_switch *ds, int port,
426 dsa_fdb_dump_cb_t *cb, void *data);
431 int (*port_mdb_prepare)(struct dsa_switch *ds, int port,
432 const struct switchdev_obj_port_mdb *mdb);
433 void (*port_mdb_add)(struct dsa_switch *ds, int port,
434 const struct switchdev_obj_port_mdb *mdb);
435 int (*port_mdb_del)(struct dsa_switch *ds, int port,
436 const struct switchdev_obj_port_mdb *mdb);
440 int (*get_rxnfc)(struct dsa_switch *ds, int port,
441 struct ethtool_rxnfc *nfc, u32 *rule_locs);
442 int (*set_rxnfc)(struct dsa_switch *ds, int port,
443 struct ethtool_rxnfc *nfc);
448 int (*port_mirror_add)(struct dsa_switch *ds, int port,
449 struct dsa_mall_mirror_tc_entry *mirror,
451 void (*port_mirror_del)(struct dsa_switch *ds, int port,
452 struct dsa_mall_mirror_tc_entry *mirror);
455 * Cross-chip operations
457 int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index,
458 int port, struct net_device *br);
459 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index,
460 int port, struct net_device *br);
465 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port,
467 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port,
469 bool (*port_txtstamp)(struct dsa_switch *ds, int port,
470 struct sk_buff *clone, unsigned int type);
471 bool (*port_rxtstamp)(struct dsa_switch *ds, int port,
472 struct sk_buff *skb, unsigned int type);
475 struct dsa_switch_driver {
476 struct list_head list;
477 const struct dsa_switch_ops *ops;
480 #if IS_ENABLED(CONFIG_NET_DSA_LEGACY)
481 /* Legacy driver registration */
482 void register_switch_driver(struct dsa_switch_driver *type);
483 void unregister_switch_driver(struct dsa_switch_driver *type);
484 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev);
487 static inline void register_switch_driver(struct dsa_switch_driver *type) { }
488 static inline void unregister_switch_driver(struct dsa_switch_driver *type) { }
489 static inline struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev)
494 struct net_device *dsa_dev_to_net_device(struct device *dev);
496 /* Keep inline for faster access in hot path */
497 static inline bool netdev_uses_dsa(struct net_device *dev)
499 #if IS_ENABLED(CONFIG_NET_DSA)
500 return dev->dsa_ptr && dev->dsa_ptr->rcv;
505 struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n);
506 void dsa_unregister_switch(struct dsa_switch *ds);
507 int dsa_register_switch(struct dsa_switch *ds);
508 #ifdef CONFIG_PM_SLEEP
509 int dsa_switch_suspend(struct dsa_switch *ds);
510 int dsa_switch_resume(struct dsa_switch *ds);
512 static inline int dsa_switch_suspend(struct dsa_switch *ds)
516 static inline int dsa_switch_resume(struct dsa_switch *ds)
520 #endif /* CONFIG_PM_SLEEP */
522 enum dsa_notifier_type {
527 struct dsa_notifier_info {
528 struct net_device *dev;
531 struct dsa_notifier_register_info {
532 struct dsa_notifier_info info; /* must be first */
533 struct net_device *master;
534 unsigned int port_number;
535 unsigned int switch_number;
538 static inline struct net_device *
539 dsa_notifier_info_to_dev(const struct dsa_notifier_info *info)
544 #if IS_ENABLED(CONFIG_NET_DSA)
545 int register_dsa_notifier(struct notifier_block *nb);
546 int unregister_dsa_notifier(struct notifier_block *nb);
547 int call_dsa_notifiers(unsigned long val, struct net_device *dev,
548 struct dsa_notifier_info *info);
550 static inline int register_dsa_notifier(struct notifier_block *nb)
555 static inline int unregister_dsa_notifier(struct notifier_block *nb)
560 static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev,
561 struct dsa_notifier_info *info)
567 /* Broadcom tag specific helpers to insert and extract queue/port number */
568 #define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q)
569 #define BRCM_TAG_GET_PORT(v) ((v) >> 8)
570 #define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff)
573 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data);
574 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data);
575 int dsa_port_get_phy_sset_count(struct dsa_port *dp);
576 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up);