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 <net/devlink.h>
26 struct fixed_phy_status;
28 enum dsa_tag_protocol {
29 DSA_TAG_PROTO_NONE = 0,
31 DSA_TAG_PROTO_TRAILER,
35 DSA_TAG_LAST, /* MUST BE LAST */
38 #define DSA_MAX_SWITCHES 4
39 #define DSA_MAX_PORTS 12
41 #define DSA_RTABLE_NONE -1
43 struct dsa_chip_data {
45 * How to access the switch configuration registers.
47 struct device *host_dev;
51 * Reference to network devices
53 struct device *netdev[DSA_MAX_PORTS];
55 /* set to size of eeprom if supported by the switch */
58 /* Device tree node pointer for this specific switch chip
59 * used during switch setup in case additional properties
60 * and resources needs to be used
62 struct device_node *of_node;
65 * The names of the switch's ports. Use "cpu" to
66 * designate the switch port that the cpu is connected to,
67 * "dsa" to indicate that this port is a DSA link to
68 * another switch, NULL to indicate the port is unused,
69 * or any other string to indicate this is a physical port.
71 char *port_names[DSA_MAX_PORTS];
72 struct device_node *port_dn[DSA_MAX_PORTS];
75 * An array of which element [a] indicates which port on this
76 * switch should be used to send packets to that are destined
77 * for switch a. Can be NULL if there is only one switch chip.
79 s8 rtable[DSA_MAX_SWITCHES];
82 struct dsa_platform_data {
84 * Reference to a Linux network interface that connects
85 * to the root switch chip of the tree.
87 struct device *netdev;
88 struct net_device *of_netdev;
91 * Info structs describing each of the switch chips
92 * connected via this network interface.
95 struct dsa_chip_data *chip;
100 struct dsa_switch_tree {
101 struct list_head list;
103 /* Notifier chain for switch-wide events */
104 struct raw_notifier_head nh;
106 /* Tree identifier */
109 /* Number of switches attached to this tree */
110 struct kref refcount;
112 /* Has this tree been applied to the hardware? */
116 * Configuration data for the platform device that owns
117 * this dsa switch tree instance.
119 struct dsa_platform_data *pd;
122 * Reference to network device to use, and which tagging
125 struct net_device *master_netdev;
126 int (*rcv)(struct sk_buff *skb,
127 struct net_device *dev,
128 struct packet_type *pt,
129 struct net_device *orig_dev);
132 * Original copy of the master netdev ethtool_ops
134 struct ethtool_ops master_ethtool_ops;
135 const struct ethtool_ops *master_orig_ethtool_ops;
138 * The switch and port to which the CPU is attached.
140 struct dsa_switch *cpu_switch;
144 * Data for the individual switch chips.
146 struct dsa_switch *ds[DSA_MAX_SWITCHES];
149 * Tagging protocol operations for adding and removing an
152 const struct dsa_device_ops *tag_ops;
155 /* TC matchall action types, only mirroring for now */
156 enum dsa_port_mall_action_type {
157 DSA_PORT_MALL_MIRROR,
160 /* TC mirroring entry */
161 struct dsa_mall_mirror_tc_entry {
166 /* TC matchall entry */
167 struct dsa_mall_tc_entry {
168 struct list_head list;
169 unsigned long cookie;
170 enum dsa_port_mall_action_type type;
172 struct dsa_mall_mirror_tc_entry mirror;
178 struct dsa_switch *ds;
181 struct net_device *netdev;
182 struct device_node *dn;
183 unsigned int ageing_time;
185 struct net_device *bridge_dev;
186 struct devlink_port devlink_port;
193 * Parent switch tree, and switch index.
195 struct dsa_switch_tree *dst;
198 /* Listener for switch fabric events */
199 struct notifier_block nb;
202 * Give the switch driver somewhere to hang its private data
208 * Configuration data for this switch.
210 struct dsa_chip_data *cd;
213 * The switch operations.
215 const struct dsa_switch_ops *ops;
218 * An array of which element [a] indicates which port on this
219 * switch should be used to send packets to that are destined
220 * for switch a. Can be NULL if there is only one switch chip.
222 s8 rtable[DSA_MAX_SWITCHES];
225 * The lower device this switch uses to talk to the host
227 struct net_device *master_netdev;
230 * Slave mii_bus and devices for the individual ports.
234 u32 enabled_port_mask;
236 struct mii_bus *slave_mii_bus;
238 /* Ageing Time limits in msecs */
239 unsigned int ageing_time_min;
240 unsigned int ageing_time_max;
242 /* devlink used to represent this switch device */
243 struct devlink *devlink;
245 /* Dynamically allocated ports, keep last */
247 struct dsa_port ports[];
250 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
252 return !!(ds == ds->dst->cpu_switch && p == ds->dst->cpu_port);
255 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
257 return !!((ds->dsa_port_mask) & (1 << p));
260 static inline bool dsa_is_normal_port(struct dsa_switch *ds, int p)
262 return !dsa_is_cpu_port(ds, p) && !dsa_is_dsa_port(ds, p);
265 static inline bool dsa_is_port_initialized(struct dsa_switch *ds, int p)
267 return ds->enabled_port_mask & (1 << p) && ds->ports[p].netdev;
270 static inline u8 dsa_upstream_port(struct dsa_switch *ds)
272 struct dsa_switch_tree *dst = ds->dst;
275 * If this is the root switch (i.e. the switch that connects
276 * to the CPU), return the cpu port number on this switch.
277 * Else return the (DSA) port number that connects to the
278 * switch that is one hop closer to the cpu.
280 if (dst->cpu_switch == ds)
281 return dst->cpu_port;
283 return ds->rtable[dst->cpu_switch->index];
286 struct switchdev_trans;
287 struct switchdev_obj;
288 struct switchdev_obj_port_fdb;
289 struct switchdev_obj_port_mdb;
290 struct switchdev_obj_port_vlan;
292 #define DSA_NOTIFIER_BRIDGE_JOIN 1
293 #define DSA_NOTIFIER_BRIDGE_LEAVE 2
295 /* DSA_NOTIFIER_BRIDGE_* */
296 struct dsa_notifier_bridge_info {
297 struct net_device *br;
302 struct dsa_switch_ops {
306 const char *(*probe)(struct device *dsa_dev,
307 struct device *host_dev, int sw_addr,
310 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds);
312 int (*setup)(struct dsa_switch *ds);
313 int (*set_addr)(struct dsa_switch *ds, u8 *addr);
314 u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
317 * Access to the switch's PHY registers.
319 int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
320 int (*phy_write)(struct dsa_switch *ds, int port,
321 int regnum, u16 val);
324 * Link state adjustment (called from libphy)
326 void (*adjust_link)(struct dsa_switch *ds, int port,
327 struct phy_device *phydev);
328 void (*fixed_link_update)(struct dsa_switch *ds, int port,
329 struct fixed_phy_status *st);
332 * ethtool hardware statistics.
334 void (*get_strings)(struct dsa_switch *ds, int port, uint8_t *data);
335 void (*get_ethtool_stats)(struct dsa_switch *ds,
336 int port, uint64_t *data);
337 int (*get_sset_count)(struct dsa_switch *ds);
340 * ethtool Wake-on-LAN
342 void (*get_wol)(struct dsa_switch *ds, int port,
343 struct ethtool_wolinfo *w);
344 int (*set_wol)(struct dsa_switch *ds, int port,
345 struct ethtool_wolinfo *w);
350 int (*suspend)(struct dsa_switch *ds);
351 int (*resume)(struct dsa_switch *ds);
354 * Port enable/disable
356 int (*port_enable)(struct dsa_switch *ds, int port,
357 struct phy_device *phy);
358 void (*port_disable)(struct dsa_switch *ds, int port,
359 struct phy_device *phy);
364 int (*set_eee)(struct dsa_switch *ds, int port,
365 struct phy_device *phydev,
366 struct ethtool_eee *e);
367 int (*get_eee)(struct dsa_switch *ds, int port,
368 struct ethtool_eee *e);
371 int (*get_eeprom_len)(struct dsa_switch *ds);
372 int (*get_eeprom)(struct dsa_switch *ds,
373 struct ethtool_eeprom *eeprom, u8 *data);
374 int (*set_eeprom)(struct dsa_switch *ds,
375 struct ethtool_eeprom *eeprom, u8 *data);
380 int (*get_regs_len)(struct dsa_switch *ds, int port);
381 void (*get_regs)(struct dsa_switch *ds, int port,
382 struct ethtool_regs *regs, void *p);
387 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
388 int (*port_bridge_join)(struct dsa_switch *ds, int port,
389 struct net_device *bridge);
390 void (*port_bridge_leave)(struct dsa_switch *ds, int port,
391 struct net_device *bridge);
392 void (*port_stp_state_set)(struct dsa_switch *ds, int port,
394 void (*port_fast_age)(struct dsa_switch *ds, int port);
399 int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
400 bool vlan_filtering);
401 int (*port_vlan_prepare)(struct dsa_switch *ds, int port,
402 const struct switchdev_obj_port_vlan *vlan,
403 struct switchdev_trans *trans);
404 void (*port_vlan_add)(struct dsa_switch *ds, int port,
405 const struct switchdev_obj_port_vlan *vlan,
406 struct switchdev_trans *trans);
407 int (*port_vlan_del)(struct dsa_switch *ds, int port,
408 const struct switchdev_obj_port_vlan *vlan);
409 int (*port_vlan_dump)(struct dsa_switch *ds, int port,
410 struct switchdev_obj_port_vlan *vlan,
411 int (*cb)(struct switchdev_obj *obj));
414 * Forwarding database
416 int (*port_fdb_prepare)(struct dsa_switch *ds, int port,
417 const struct switchdev_obj_port_fdb *fdb,
418 struct switchdev_trans *trans);
419 void (*port_fdb_add)(struct dsa_switch *ds, int port,
420 const struct switchdev_obj_port_fdb *fdb,
421 struct switchdev_trans *trans);
422 int (*port_fdb_del)(struct dsa_switch *ds, int port,
423 const struct switchdev_obj_port_fdb *fdb);
424 int (*port_fdb_dump)(struct dsa_switch *ds, int port,
425 struct switchdev_obj_port_fdb *fdb,
426 int (*cb)(struct switchdev_obj *obj));
431 int (*port_mdb_prepare)(struct dsa_switch *ds, int port,
432 const struct switchdev_obj_port_mdb *mdb,
433 struct switchdev_trans *trans);
434 void (*port_mdb_add)(struct dsa_switch *ds, int port,
435 const struct switchdev_obj_port_mdb *mdb,
436 struct switchdev_trans *trans);
437 int (*port_mdb_del)(struct dsa_switch *ds, int port,
438 const struct switchdev_obj_port_mdb *mdb);
439 int (*port_mdb_dump)(struct dsa_switch *ds, int port,
440 struct switchdev_obj_port_mdb *mdb,
441 int (*cb)(struct switchdev_obj *obj));
446 int (*get_rxnfc)(struct dsa_switch *ds, int port,
447 struct ethtool_rxnfc *nfc, u32 *rule_locs);
448 int (*set_rxnfc)(struct dsa_switch *ds, int port,
449 struct ethtool_rxnfc *nfc);
454 int (*port_mirror_add)(struct dsa_switch *ds, int port,
455 struct dsa_mall_mirror_tc_entry *mirror,
457 void (*port_mirror_del)(struct dsa_switch *ds, int port,
458 struct dsa_mall_mirror_tc_entry *mirror);
461 * Cross-chip operations
463 int (*crosschip_bridge_join)(struct dsa_switch *ds, int sw_index,
464 int port, struct net_device *br);
465 void (*crosschip_bridge_leave)(struct dsa_switch *ds, int sw_index,
466 int port, struct net_device *br);
469 struct dsa_switch_driver {
470 struct list_head list;
471 const struct dsa_switch_ops *ops;
474 void register_switch_driver(struct dsa_switch_driver *type);
475 void unregister_switch_driver(struct dsa_switch_driver *type);
476 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev);
477 struct net_device *dsa_dev_to_net_device(struct device *dev);
479 static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst)
481 return dst->rcv != NULL;
484 static inline bool netdev_uses_dsa(struct net_device *dev)
486 #if IS_ENABLED(CONFIG_NET_DSA)
487 if (dev->dsa_ptr != NULL)
488 return dsa_uses_tagged_protocol(dev->dsa_ptr);
493 struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n);
494 void dsa_unregister_switch(struct dsa_switch *ds);
495 int dsa_register_switch(struct dsa_switch *ds, struct device *dev);
496 #ifdef CONFIG_PM_SLEEP
497 int dsa_switch_suspend(struct dsa_switch *ds);
498 int dsa_switch_resume(struct dsa_switch *ds);
500 static inline int dsa_switch_suspend(struct dsa_switch *ds)
504 static inline int dsa_switch_resume(struct dsa_switch *ds)
508 #endif /* CONFIG_PM_SLEEP */