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_LAN9303,
44 DSA_TAG_PROTO_TRAILER,
45 DSA_TAG_LAST, /* MUST BE LAST */
51 struct dsa_device_ops {
52 struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
53 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
54 struct packet_type *pt);
55 int (*flow_dissect)(const struct sk_buff *skb, __be16 *proto,
57 unsigned int overhead;
60 struct dsa_switch_tree {
61 struct list_head list;
63 /* Notifier chain for switch-wide events */
64 struct raw_notifier_head nh;
69 /* Number of switches attached to this tree */
72 /* Has this tree been applied to the hardware? */
76 * Configuration data for the platform device that owns
77 * this dsa switch tree instance.
79 struct dsa_platform_data *pd;
82 * The switch port to which the CPU is attached.
84 struct dsa_port *cpu_dp;
87 * Data for the individual switch chips.
89 struct dsa_switch *ds[DSA_MAX_SWITCHES];
92 /* TC matchall action types, only mirroring for now */
93 enum dsa_port_mall_action_type {
97 /* TC mirroring entry */
98 struct dsa_mall_mirror_tc_entry {
103 /* TC matchall entry */
104 struct dsa_mall_tc_entry {
105 struct list_head list;
106 unsigned long cookie;
107 enum dsa_port_mall_action_type type;
109 struct dsa_mall_mirror_tc_entry mirror;
115 /* A CPU port is physically connected to a master device.
116 * A user port exposed to userspace has a slave device.
119 struct net_device *master;
120 struct net_device *slave;
123 /* CPU port tagging operations used by master or slave devices */
124 const struct dsa_device_ops *tag_ops;
126 /* Copies for faster access in master receive hot path */
127 struct dsa_switch_tree *dst;
128 struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
129 struct packet_type *pt);
132 DSA_PORT_TYPE_UNUSED = 0,
138 struct dsa_switch *ds;
141 const struct dsa_port *cpu_dp;
142 struct device_node *dn;
143 unsigned int ageing_time;
145 struct net_device *bridge_dev;
146 struct devlink_port devlink_port;
149 * Original copy of the master netdev ethtool_ops
151 const struct ethtool_ops *orig_ethtool_ops;
154 * Original copy of the master netdev net_device_ops
156 const struct net_device_ops *orig_ndo_ops;
163 * Parent switch tree, and switch index.
165 struct dsa_switch_tree *dst;
168 /* Listener for switch fabric events */
169 struct notifier_block nb;
172 * Give the switch driver somewhere to hang its private data
178 * Configuration data for this switch.
180 struct dsa_chip_data *cd;
183 * The switch operations.
185 const struct dsa_switch_ops *ops;
188 * An array of which element [a] indicates which port on this
189 * switch should be used to send packets to that are destined
190 * for switch a. Can be NULL if there is only one switch chip.
192 s8 rtable[DSA_MAX_SWITCHES];
195 * Slave mii_bus and devices for the individual ports.
198 struct mii_bus *slave_mii_bus;
200 /* Ageing Time limits in msecs */
201 unsigned int ageing_time_min;
202 unsigned int ageing_time_max;
204 /* devlink used to represent this switch device */
205 struct devlink *devlink;
207 /* Number of switch port queues */
208 unsigned int num_tx_queues;
210 unsigned long *bitmap;
211 unsigned long _bitmap;
213 /* Dynamically allocated ports, keep last */
215 struct dsa_port ports[];
218 static inline const struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
220 return &ds->ports[p];
223 static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
225 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;
228 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
230 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;
233 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
235 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;
238 static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
240 return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;
243 static inline u32 dsa_user_ports(struct dsa_switch *ds)
248 for (p = 0; p < ds->num_ports; p++)
249 if (dsa_is_user_port(ds, p))
255 /* Return the local port used to reach an arbitrary switch port */
256 static inline unsigned int dsa_towards_port(struct dsa_switch *ds, int device,
259 if (device == ds->index)
262 return ds->rtable[device];
265 /* Return the local port used to reach the dedicated CPU port */
266 static inline unsigned int dsa_upstream_port(struct dsa_switch *ds, int port)
268 const struct dsa_port *dp = dsa_to_port(ds, port);
269 const struct dsa_port *cpu_dp = dp->cpu_dp;
274 return dsa_towards_port(ds, cpu_dp->ds->index, cpu_dp->index);
277 typedef int dsa_fdb_dump_cb_t(const unsigned char *addr, u16 vid,
278 bool is_static, void *data);
279 struct dsa_switch_ops {
280 #if IS_ENABLED(CONFIG_NET_DSA_LEGACY)
284 const char *(*probe)(struct device *dsa_dev,
285 struct device *host_dev, int sw_addr,
289 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds,
292 int (*setup)(struct dsa_switch *ds);
293 u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
296 * Access to the switch's PHY registers.
298 int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
299 int (*phy_write)(struct dsa_switch *ds, int port,
300 int regnum, u16 val);
303 * Link state adjustment (called from libphy)
305 void (*adjust_link)(struct dsa_switch *ds, int port,
306 struct phy_device *phydev);
307 void (*fixed_link_update)(struct dsa_switch *ds, int port,
308 struct fixed_phy_status *st);
311 * PHYLINK integration
313 void (*phylink_validate)(struct dsa_switch *ds, int port,
314 unsigned long *supported,
315 struct phylink_link_state *state);
316 int (*phylink_mac_link_state)(struct dsa_switch *ds, int port,
317 struct phylink_link_state *state);
318 void (*phylink_mac_config)(struct dsa_switch *ds, int port,
320 const struct phylink_link_state *state);
321 void (*phylink_mac_an_restart)(struct dsa_switch *ds, int port);
322 void (*phylink_mac_link_down)(struct dsa_switch *ds, int port,
324 phy_interface_t interface);
325 void (*phylink_mac_link_up)(struct dsa_switch *ds, int port,
327 phy_interface_t interface,
328 struct phy_device *phydev);
329 void (*phylink_fixed_state)(struct dsa_switch *ds, int port,
330 struct phylink_link_state *state);
332 * ethtool hardware statistics.
334 void (*get_strings)(struct dsa_switch *ds, int port,
335 u32 stringset, uint8_t *data);
336 void (*get_ethtool_stats)(struct dsa_switch *ds,
337 int port, uint64_t *data);
338 int (*get_sset_count)(struct dsa_switch *ds, int port, int sset);
339 void (*get_ethtool_phy_stats)(struct dsa_switch *ds,
340 int port, uint64_t *data);
343 * ethtool Wake-on-LAN
345 void (*get_wol)(struct dsa_switch *ds, int port,
346 struct ethtool_wolinfo *w);
347 int (*set_wol)(struct dsa_switch *ds, int port,
348 struct ethtool_wolinfo *w);
351 * ethtool timestamp info
353 int (*get_ts_info)(struct dsa_switch *ds, int port,
354 struct ethtool_ts_info *ts);
359 int (*suspend)(struct dsa_switch *ds);
360 int (*resume)(struct dsa_switch *ds);
363 * Port enable/disable
365 int (*port_enable)(struct dsa_switch *ds, int port,
366 struct phy_device *phy);
367 void (*port_disable)(struct dsa_switch *ds, int port);
370 * Port's MAC EEE settings
372 int (*set_mac_eee)(struct dsa_switch *ds, int port,
373 struct ethtool_eee *e);
374 int (*get_mac_eee)(struct dsa_switch *ds, int port,
375 struct ethtool_eee *e);
378 int (*get_eeprom_len)(struct dsa_switch *ds);
379 int (*get_eeprom)(struct dsa_switch *ds,
380 struct ethtool_eeprom *eeprom, u8 *data);
381 int (*set_eeprom)(struct dsa_switch *ds,
382 struct ethtool_eeprom *eeprom, u8 *data);
387 int (*get_regs_len)(struct dsa_switch *ds, int port);
388 void (*get_regs)(struct dsa_switch *ds, int port,
389 struct ethtool_regs *regs, void *p);
394 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
395 int (*port_bridge_join)(struct dsa_switch *ds, int port,
396 struct net_device *bridge);
397 void (*port_bridge_leave)(struct dsa_switch *ds, int port,
398 struct net_device *bridge);
399 void (*port_stp_state_set)(struct dsa_switch *ds, int port,
401 void (*port_fast_age)(struct dsa_switch *ds, int port);
402 int (*port_egress_floods)(struct dsa_switch *ds, int port,
403 bool unicast, bool multicast);
408 int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
409 bool vlan_filtering);
410 int (*port_vlan_prepare)(struct dsa_switch *ds, int port,
411 const struct switchdev_obj_port_vlan *vlan);
412 void (*port_vlan_add)(struct dsa_switch *ds, int port,
413 const struct switchdev_obj_port_vlan *vlan);
414 int (*port_vlan_del)(struct dsa_switch *ds, int port,
415 const struct switchdev_obj_port_vlan *vlan);
417 * Forwarding database
419 int (*port_fdb_add)(struct dsa_switch *ds, int port,
420 const unsigned char *addr, u16 vid);
421 int (*port_fdb_del)(struct dsa_switch *ds, int port,
422 const unsigned char *addr, u16 vid);
423 int (*port_fdb_dump)(struct dsa_switch *ds, int port,
424 dsa_fdb_dump_cb_t *cb, void *data);
429 int (*port_mdb_prepare)(struct dsa_switch *ds, int port,
430 const struct switchdev_obj_port_mdb *mdb);
431 void (*port_mdb_add)(struct dsa_switch *ds, int port,
432 const struct switchdev_obj_port_mdb *mdb);
433 int (*port_mdb_del)(struct dsa_switch *ds, int port,
434 const struct switchdev_obj_port_mdb *mdb);
438 int (*get_rxnfc)(struct dsa_switch *ds, int port,
439 struct ethtool_rxnfc *nfc, u32 *rule_locs);
440 int (*set_rxnfc)(struct dsa_switch *ds, int port,
441 struct ethtool_rxnfc *nfc);
446 int (*port_mirror_add)(struct dsa_switch *ds, int port,
447 struct dsa_mall_mirror_tc_entry *mirror,
449 void (*port_mirror_del)(struct dsa_switch *ds, int port,
450 struct dsa_mall_mirror_tc_entry *mirror);
453 * Cross-chip operations
455 int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index,
456 int port, struct net_device *br);
457 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index,
458 int port, struct net_device *br);
463 int (*port_hwtstamp_get)(struct dsa_switch *ds, int port,
465 int (*port_hwtstamp_set)(struct dsa_switch *ds, int port,
467 bool (*port_txtstamp)(struct dsa_switch *ds, int port,
468 struct sk_buff *clone, unsigned int type);
469 bool (*port_rxtstamp)(struct dsa_switch *ds, int port,
470 struct sk_buff *skb, unsigned int type);
473 struct dsa_switch_driver {
474 struct list_head list;
475 const struct dsa_switch_ops *ops;
478 #if IS_ENABLED(CONFIG_NET_DSA_LEGACY)
479 /* Legacy driver registration */
480 void register_switch_driver(struct dsa_switch_driver *type);
481 void unregister_switch_driver(struct dsa_switch_driver *type);
482 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev);
485 static inline void register_switch_driver(struct dsa_switch_driver *type) { }
486 static inline void unregister_switch_driver(struct dsa_switch_driver *type) { }
487 static inline struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev)
492 struct net_device *dsa_dev_to_net_device(struct device *dev);
494 /* Keep inline for faster access in hot path */
495 static inline bool netdev_uses_dsa(struct net_device *dev)
497 #if IS_ENABLED(CONFIG_NET_DSA)
498 return dev->dsa_ptr && dev->dsa_ptr->rcv;
503 struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n);
504 void dsa_unregister_switch(struct dsa_switch *ds);
505 int dsa_register_switch(struct dsa_switch *ds);
506 #ifdef CONFIG_PM_SLEEP
507 int dsa_switch_suspend(struct dsa_switch *ds);
508 int dsa_switch_resume(struct dsa_switch *ds);
510 static inline int dsa_switch_suspend(struct dsa_switch *ds)
514 static inline int dsa_switch_resume(struct dsa_switch *ds)
518 #endif /* CONFIG_PM_SLEEP */
520 enum dsa_notifier_type {
525 struct dsa_notifier_info {
526 struct net_device *dev;
529 struct dsa_notifier_register_info {
530 struct dsa_notifier_info info; /* must be first */
531 struct net_device *master;
532 unsigned int port_number;
533 unsigned int switch_number;
536 static inline struct net_device *
537 dsa_notifier_info_to_dev(const struct dsa_notifier_info *info)
542 #if IS_ENABLED(CONFIG_NET_DSA)
543 int register_dsa_notifier(struct notifier_block *nb);
544 int unregister_dsa_notifier(struct notifier_block *nb);
545 int call_dsa_notifiers(unsigned long val, struct net_device *dev,
546 struct dsa_notifier_info *info);
548 static inline int register_dsa_notifier(struct notifier_block *nb)
553 static inline int unregister_dsa_notifier(struct notifier_block *nb)
558 static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev,
559 struct dsa_notifier_info *info)
565 /* Broadcom tag specific helpers to insert and extract queue/port number */
566 #define BRCM_TAG_SET_PORT_QUEUE(p, q) ((p) << 8 | q)
567 #define BRCM_TAG_GET_PORT(v) ((v) >> 8)
568 #define BRCM_TAG_GET_QUEUE(v) ((v) & 0xff)
571 int dsa_port_get_phy_strings(struct dsa_port *dp, uint8_t *data);
572 int dsa_port_get_ethtool_phy_stats(struct dsa_port *dp, uint64_t *data);
573 int dsa_port_get_phy_sset_count(struct dsa_port *dp);
574 void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up);