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/timer.h>
17 #include <linux/workqueue.h>
19 #include <linux/phy.h>
20 #include <linux/phy_fixed.h>
21 #include <linux/ethtool.h>
23 enum dsa_tag_protocol {
24 DSA_TAG_PROTO_NONE = 0,
26 DSA_TAG_PROTO_TRAILER,
29 DSA_TAG_LAST, /* MUST BE LAST */
32 #define DSA_MAX_SWITCHES 4
33 #define DSA_MAX_PORTS 12
35 struct dsa_chip_data {
37 * How to access the switch configuration registers.
39 struct device *host_dev;
42 /* set to size of eeprom if supported by the switch */
45 /* Device tree node pointer for this specific switch chip
46 * used during switch setup in case additional properties
47 * and resources needs to be used
49 struct device_node *of_node;
52 * The names of the switch's ports. Use "cpu" to
53 * designate the switch port that the cpu is connected to,
54 * "dsa" to indicate that this port is a DSA link to
55 * another switch, NULL to indicate the port is unused,
56 * or any other string to indicate this is a physical port.
58 char *port_names[DSA_MAX_PORTS];
59 struct device_node *port_dn[DSA_MAX_PORTS];
62 * An array of which element [a] indicates which port on this
63 * switch should be used to send packets to that are destined
64 * for switch a. Can be NULL if there is only one switch chip.
66 s8 rtable[DSA_MAX_SWITCHES];
69 struct dsa_platform_data {
71 * Reference to a Linux network interface that connects
72 * to the root switch chip of the tree.
74 struct device *netdev;
75 struct net_device *of_netdev;
78 * Info structs describing each of the switch chips
79 * connected via this network interface.
82 struct dsa_chip_data *chip;
87 struct dsa_switch_tree {
89 * Configuration data for the platform device that owns
90 * this dsa switch tree instance.
92 struct dsa_platform_data *pd;
95 * Reference to network device to use, and which tagging
98 struct net_device *master_netdev;
99 int (*rcv)(struct sk_buff *skb,
100 struct net_device *dev,
101 struct packet_type *pt,
102 struct net_device *orig_dev);
105 * Original copy of the master netdev ethtool_ops
107 struct ethtool_ops master_ethtool_ops;
110 * The switch and port to which the CPU is attached.
116 * Data for the individual switch chips.
118 struct dsa_switch *ds[DSA_MAX_SWITCHES];
121 * Tagging protocol operations for adding and removing an
124 const struct dsa_device_ops *tag_ops;
128 struct net_device *netdev;
129 struct device_node *dn;
136 * Parent switch tree, and switch index.
138 struct dsa_switch_tree *dst;
142 * Give the switch driver somewhere to hang its private data
148 * Configuration data for this switch.
150 struct dsa_chip_data *cd;
153 * The used switch driver.
155 struct dsa_switch_driver *drv;
158 * An array of which element [a] indicates which port on this
159 * switch should be used to send packets to that are destined
160 * for switch a. Can be NULL if there is only one switch chip.
162 s8 rtable[DSA_MAX_SWITCHES];
164 #ifdef CONFIG_NET_DSA_HWMON
166 * Hardware monitoring information
168 char hwmon_name[IFNAMSIZ + 8];
169 struct device *hwmon_dev;
173 * Slave mii_bus and devices for the individual ports.
176 u32 enabled_port_mask;
178 struct dsa_port ports[DSA_MAX_PORTS];
179 struct mii_bus *slave_mii_bus;
182 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
184 return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port);
187 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
189 return !!((ds->dsa_port_mask) & (1 << p));
192 static inline bool dsa_is_port_initialized(struct dsa_switch *ds, int p)
194 return ds->enabled_port_mask & (1 << p) && ds->ports[p].netdev;
197 static inline u8 dsa_upstream_port(struct dsa_switch *ds)
199 struct dsa_switch_tree *dst = ds->dst;
202 * If this is the root switch (i.e. the switch that connects
203 * to the CPU), return the cpu port number on this switch.
204 * Else return the (DSA) port number that connects to the
205 * switch that is one hop closer to the cpu.
207 if (dst->cpu_switch == ds->index)
208 return dst->cpu_port;
210 return ds->rtable[dst->cpu_switch];
213 struct switchdev_trans;
214 struct switchdev_obj;
215 struct switchdev_obj_port_fdb;
216 struct switchdev_obj_port_vlan;
218 struct dsa_switch_driver {
219 struct list_head list;
221 enum dsa_tag_protocol tag_protocol;
226 const char *(*probe)(struct device *dsa_dev,
227 struct device *host_dev, int sw_addr,
229 int (*setup)(struct dsa_switch *ds);
230 int (*set_addr)(struct dsa_switch *ds, u8 *addr);
231 u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
234 * Access to the switch's PHY registers.
236 int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
237 int (*phy_write)(struct dsa_switch *ds, int port,
238 int regnum, u16 val);
241 * Link state adjustment (called from libphy)
243 void (*adjust_link)(struct dsa_switch *ds, int port,
244 struct phy_device *phydev);
245 void (*fixed_link_update)(struct dsa_switch *ds, int port,
246 struct fixed_phy_status *st);
249 * ethtool hardware statistics.
251 void (*get_strings)(struct dsa_switch *ds, int port, uint8_t *data);
252 void (*get_ethtool_stats)(struct dsa_switch *ds,
253 int port, uint64_t *data);
254 int (*get_sset_count)(struct dsa_switch *ds);
257 * ethtool Wake-on-LAN
259 void (*get_wol)(struct dsa_switch *ds, int port,
260 struct ethtool_wolinfo *w);
261 int (*set_wol)(struct dsa_switch *ds, int port,
262 struct ethtool_wolinfo *w);
267 int (*suspend)(struct dsa_switch *ds);
268 int (*resume)(struct dsa_switch *ds);
271 * Port enable/disable
273 int (*port_enable)(struct dsa_switch *ds, int port,
274 struct phy_device *phy);
275 void (*port_disable)(struct dsa_switch *ds, int port,
276 struct phy_device *phy);
281 int (*set_eee)(struct dsa_switch *ds, int port,
282 struct phy_device *phydev,
283 struct ethtool_eee *e);
284 int (*get_eee)(struct dsa_switch *ds, int port,
285 struct ethtool_eee *e);
287 #ifdef CONFIG_NET_DSA_HWMON
288 /* Hardware monitoring */
289 int (*get_temp)(struct dsa_switch *ds, int *temp);
290 int (*get_temp_limit)(struct dsa_switch *ds, int *temp);
291 int (*set_temp_limit)(struct dsa_switch *ds, int temp);
292 int (*get_temp_alarm)(struct dsa_switch *ds, bool *alarm);
296 int (*get_eeprom_len)(struct dsa_switch *ds);
297 int (*get_eeprom)(struct dsa_switch *ds,
298 struct ethtool_eeprom *eeprom, u8 *data);
299 int (*set_eeprom)(struct dsa_switch *ds,
300 struct ethtool_eeprom *eeprom, u8 *data);
305 int (*get_regs_len)(struct dsa_switch *ds, int port);
306 void (*get_regs)(struct dsa_switch *ds, int port,
307 struct ethtool_regs *regs, void *p);
312 int (*port_bridge_join)(struct dsa_switch *ds, int port,
313 struct net_device *bridge);
314 void (*port_bridge_leave)(struct dsa_switch *ds, int port);
315 void (*port_stp_state_set)(struct dsa_switch *ds, int port,
321 int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
322 bool vlan_filtering);
323 int (*port_vlan_prepare)(struct dsa_switch *ds, int port,
324 const struct switchdev_obj_port_vlan *vlan,
325 struct switchdev_trans *trans);
326 void (*port_vlan_add)(struct dsa_switch *ds, int port,
327 const struct switchdev_obj_port_vlan *vlan,
328 struct switchdev_trans *trans);
329 int (*port_vlan_del)(struct dsa_switch *ds, int port,
330 const struct switchdev_obj_port_vlan *vlan);
331 int (*port_vlan_dump)(struct dsa_switch *ds, int port,
332 struct switchdev_obj_port_vlan *vlan,
333 int (*cb)(struct switchdev_obj *obj));
336 * Forwarding database
338 int (*port_fdb_prepare)(struct dsa_switch *ds, int port,
339 const struct switchdev_obj_port_fdb *fdb,
340 struct switchdev_trans *trans);
341 void (*port_fdb_add)(struct dsa_switch *ds, int port,
342 const struct switchdev_obj_port_fdb *fdb,
343 struct switchdev_trans *trans);
344 int (*port_fdb_del)(struct dsa_switch *ds, int port,
345 const struct switchdev_obj_port_fdb *fdb);
346 int (*port_fdb_dump)(struct dsa_switch *ds, int port,
347 struct switchdev_obj_port_fdb *fdb,
348 int (*cb)(struct switchdev_obj *obj));
351 void register_switch_driver(struct dsa_switch_driver *type);
352 void unregister_switch_driver(struct dsa_switch_driver *type);
353 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev);
355 static inline void *ds_to_priv(struct dsa_switch *ds)
360 static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst)
362 return dst->rcv != NULL;