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
14 #include <linux/if_ether.h>
15 #include <linux/list.h>
16 #include <linux/notifier.h>
17 #include <linux/timer.h>
18 #include <linux/workqueue.h>
20 #include <linux/phy.h>
21 #include <linux/phy_fixed.h>
22 #include <linux/ethtool.h>
26 enum dsa_tag_protocol {
27 DSA_TAG_PROTO_NONE = 0,
29 DSA_TAG_PROTO_TRAILER,
33 DSA_TAG_LAST, /* MUST BE LAST */
36 #define DSA_MAX_SWITCHES 4
37 #define DSA_MAX_PORTS 12
39 #define DSA_RTABLE_NONE -1
41 struct dsa_chip_data {
43 * How to access the switch configuration registers.
45 struct device *host_dev;
48 /* set to size of eeprom if supported by the switch */
51 /* Device tree node pointer for this specific switch chip
52 * used during switch setup in case additional properties
53 * and resources needs to be used
55 struct device_node *of_node;
58 * The names of the switch's ports. Use "cpu" to
59 * designate the switch port that the cpu is connected to,
60 * "dsa" to indicate that this port is a DSA link to
61 * another switch, NULL to indicate the port is unused,
62 * or any other string to indicate this is a physical port.
64 char *port_names[DSA_MAX_PORTS];
65 struct device_node *port_dn[DSA_MAX_PORTS];
68 * An array of which element [a] indicates which port on this
69 * switch should be used to send packets to that are destined
70 * for switch a. Can be NULL if there is only one switch chip.
72 s8 rtable[DSA_MAX_SWITCHES];
75 struct dsa_platform_data {
77 * Reference to a Linux network interface that connects
78 * to the root switch chip of the tree.
80 struct device *netdev;
81 struct net_device *of_netdev;
84 * Info structs describing each of the switch chips
85 * connected via this network interface.
88 struct dsa_chip_data *chip;
93 struct dsa_switch_tree {
94 struct list_head list;
96 /* Notifier chain for switch-wide events */
97 struct raw_notifier_head nh;
102 /* Number of switches attached to this tree */
103 struct kref refcount;
105 /* Has this tree been applied to the hardware? */
109 * Configuration data for the platform device that owns
110 * this dsa switch tree instance.
112 struct dsa_platform_data *pd;
115 * Reference to network device to use, and which tagging
118 struct net_device *master_netdev;
119 int (*rcv)(struct sk_buff *skb,
120 struct net_device *dev,
121 struct packet_type *pt,
122 struct net_device *orig_dev);
125 * Original copy of the master netdev ethtool_ops
127 struct ethtool_ops master_ethtool_ops;
128 const struct ethtool_ops *master_orig_ethtool_ops;
131 * The switch and port to which the CPU is attached.
133 struct dsa_switch *cpu_switch;
137 * Data for the individual switch chips.
139 struct dsa_switch *ds[DSA_MAX_SWITCHES];
142 * Tagging protocol operations for adding and removing an
145 const struct dsa_device_ops *tag_ops;
148 /* TC matchall action types, only mirroring for now */
149 enum dsa_port_mall_action_type {
150 DSA_PORT_MALL_MIRROR,
153 /* TC mirroring entry */
154 struct dsa_mall_mirror_tc_entry {
159 /* TC matchall entry */
160 struct dsa_mall_tc_entry {
161 struct list_head list;
162 unsigned long cookie;
163 enum dsa_port_mall_action_type type;
165 struct dsa_mall_mirror_tc_entry mirror;
171 struct dsa_switch *ds;
173 struct net_device *netdev;
174 struct device_node *dn;
175 unsigned int ageing_time;
177 struct net_device *bridge_dev;
184 * Parent switch tree, and switch index.
186 struct dsa_switch_tree *dst;
189 /* Listener for switch fabric events */
190 struct notifier_block nb;
193 * Give the switch driver somewhere to hang its private data
199 * Configuration data for this switch.
201 struct dsa_chip_data *cd;
204 * The switch operations.
206 const struct dsa_switch_ops *ops;
209 * An array of which element [a] indicates which port on this
210 * switch should be used to send packets to that are destined
211 * for switch a. Can be NULL if there is only one switch chip.
213 s8 rtable[DSA_MAX_SWITCHES];
216 * The lower device this switch uses to talk to the host
218 struct net_device *master_netdev;
221 * Slave mii_bus and devices for the individual ports.
225 u32 enabled_port_mask;
227 struct mii_bus *slave_mii_bus;
229 /* Dynamically allocated ports, keep last */
231 struct dsa_port ports[];
234 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
236 return !!(ds == ds->dst->cpu_switch && p == ds->dst->cpu_port);
239 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
241 return !!((ds->dsa_port_mask) & (1 << p));
244 static inline bool dsa_is_port_initialized(struct dsa_switch *ds, int p)
246 return ds->enabled_port_mask & (1 << p) && ds->ports[p].netdev;
249 static inline u8 dsa_upstream_port(struct dsa_switch *ds)
251 struct dsa_switch_tree *dst = ds->dst;
254 * If this is the root switch (i.e. the switch that connects
255 * to the CPU), return the cpu port number on this switch.
256 * Else return the (DSA) port number that connects to the
257 * switch that is one hop closer to the cpu.
259 if (dst->cpu_switch == ds)
260 return dst->cpu_port;
262 return ds->rtable[dst->cpu_switch->index];
265 struct switchdev_trans;
266 struct switchdev_obj;
267 struct switchdev_obj_port_fdb;
268 struct switchdev_obj_port_mdb;
269 struct switchdev_obj_port_vlan;
271 struct dsa_switch_ops {
275 const char *(*probe)(struct device *dsa_dev,
276 struct device *host_dev, int sw_addr,
279 enum dsa_tag_protocol (*get_tag_protocol)(struct dsa_switch *ds);
281 int (*setup)(struct dsa_switch *ds);
282 int (*set_addr)(struct dsa_switch *ds, u8 *addr);
283 u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
286 * Access to the switch's PHY registers.
288 int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
289 int (*phy_write)(struct dsa_switch *ds, int port,
290 int regnum, u16 val);
293 * Link state adjustment (called from libphy)
295 void (*adjust_link)(struct dsa_switch *ds, int port,
296 struct phy_device *phydev);
297 void (*fixed_link_update)(struct dsa_switch *ds, int port,
298 struct fixed_phy_status *st);
301 * ethtool hardware statistics.
303 void (*get_strings)(struct dsa_switch *ds, int port, uint8_t *data);
304 void (*get_ethtool_stats)(struct dsa_switch *ds,
305 int port, uint64_t *data);
306 int (*get_sset_count)(struct dsa_switch *ds);
309 * ethtool Wake-on-LAN
311 void (*get_wol)(struct dsa_switch *ds, int port,
312 struct ethtool_wolinfo *w);
313 int (*set_wol)(struct dsa_switch *ds, int port,
314 struct ethtool_wolinfo *w);
319 int (*suspend)(struct dsa_switch *ds);
320 int (*resume)(struct dsa_switch *ds);
323 * Port enable/disable
325 int (*port_enable)(struct dsa_switch *ds, int port,
326 struct phy_device *phy);
327 void (*port_disable)(struct dsa_switch *ds, int port,
328 struct phy_device *phy);
333 int (*set_eee)(struct dsa_switch *ds, int port,
334 struct phy_device *phydev,
335 struct ethtool_eee *e);
336 int (*get_eee)(struct dsa_switch *ds, int port,
337 struct ethtool_eee *e);
340 int (*get_eeprom_len)(struct dsa_switch *ds);
341 int (*get_eeprom)(struct dsa_switch *ds,
342 struct ethtool_eeprom *eeprom, u8 *data);
343 int (*set_eeprom)(struct dsa_switch *ds,
344 struct ethtool_eeprom *eeprom, u8 *data);
349 int (*get_regs_len)(struct dsa_switch *ds, int port);
350 void (*get_regs)(struct dsa_switch *ds, int port,
351 struct ethtool_regs *regs, void *p);
356 int (*set_ageing_time)(struct dsa_switch *ds, unsigned int msecs);
357 int (*port_bridge_join)(struct dsa_switch *ds, int port,
358 struct net_device *bridge);
359 void (*port_bridge_leave)(struct dsa_switch *ds, int port,
360 struct net_device *bridge);
361 void (*port_stp_state_set)(struct dsa_switch *ds, int port,
363 void (*port_fast_age)(struct dsa_switch *ds, int port);
368 int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
369 bool vlan_filtering);
370 int (*port_vlan_prepare)(struct dsa_switch *ds, int port,
371 const struct switchdev_obj_port_vlan *vlan,
372 struct switchdev_trans *trans);
373 void (*port_vlan_add)(struct dsa_switch *ds, int port,
374 const struct switchdev_obj_port_vlan *vlan,
375 struct switchdev_trans *trans);
376 int (*port_vlan_del)(struct dsa_switch *ds, int port,
377 const struct switchdev_obj_port_vlan *vlan);
378 int (*port_vlan_dump)(struct dsa_switch *ds, int port,
379 struct switchdev_obj_port_vlan *vlan,
380 int (*cb)(struct switchdev_obj *obj));
383 * Forwarding database
385 int (*port_fdb_prepare)(struct dsa_switch *ds, int port,
386 const struct switchdev_obj_port_fdb *fdb,
387 struct switchdev_trans *trans);
388 void (*port_fdb_add)(struct dsa_switch *ds, int port,
389 const struct switchdev_obj_port_fdb *fdb,
390 struct switchdev_trans *trans);
391 int (*port_fdb_del)(struct dsa_switch *ds, int port,
392 const struct switchdev_obj_port_fdb *fdb);
393 int (*port_fdb_dump)(struct dsa_switch *ds, int port,
394 struct switchdev_obj_port_fdb *fdb,
395 int (*cb)(struct switchdev_obj *obj));
400 int (*port_mdb_prepare)(struct dsa_switch *ds, int port,
401 const struct switchdev_obj_port_mdb *mdb,
402 struct switchdev_trans *trans);
403 void (*port_mdb_add)(struct dsa_switch *ds, int port,
404 const struct switchdev_obj_port_mdb *mdb,
405 struct switchdev_trans *trans);
406 int (*port_mdb_del)(struct dsa_switch *ds, int port,
407 const struct switchdev_obj_port_mdb *mdb);
408 int (*port_mdb_dump)(struct dsa_switch *ds, int port,
409 struct switchdev_obj_port_mdb *mdb,
410 int (*cb)(struct switchdev_obj *obj));
415 int (*get_rxnfc)(struct dsa_switch *ds, int port,
416 struct ethtool_rxnfc *nfc, u32 *rule_locs);
417 int (*set_rxnfc)(struct dsa_switch *ds, int port,
418 struct ethtool_rxnfc *nfc);
423 int (*port_mirror_add)(struct dsa_switch *ds, int port,
424 struct dsa_mall_mirror_tc_entry *mirror,
426 void (*port_mirror_del)(struct dsa_switch *ds, int port,
427 struct dsa_mall_mirror_tc_entry *mirror);
430 struct dsa_switch_driver {
431 struct list_head list;
432 const struct dsa_switch_ops *ops;
435 void register_switch_driver(struct dsa_switch_driver *type);
436 void unregister_switch_driver(struct dsa_switch_driver *type);
437 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev);
439 static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst)
441 return dst->rcv != NULL;
444 struct dsa_switch *dsa_switch_alloc(struct device *dev, size_t n);
445 void dsa_unregister_switch(struct dsa_switch *ds);
446 int dsa_register_switch(struct dsa_switch *ds, struct device *dev);
447 #ifdef CONFIG_PM_SLEEP
448 int dsa_switch_suspend(struct dsa_switch *ds);
449 int dsa_switch_resume(struct dsa_switch *ds);
451 static inline int dsa_switch_suspend(struct dsa_switch *ds)
455 static inline int dsa_switch_resume(struct dsa_switch *ds)
459 #endif /* CONFIG_PM_SLEEP */