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,
31 #define DSA_MAX_SWITCHES 4
32 #define DSA_MAX_PORTS 12
34 struct dsa_chip_data {
36 * How to access the switch configuration registers.
38 struct device *host_dev;
41 /* set to size of eeprom if supported by the switch */
44 /* Device tree node pointer for this specific switch chip
45 * used during switch setup in case additional properties
46 * and resources needs to be used
48 struct device_node *of_node;
51 * The names of the switch's ports. Use "cpu" to
52 * designate the switch port that the cpu is connected to,
53 * "dsa" to indicate that this port is a DSA link to
54 * another switch, NULL to indicate the port is unused,
55 * or any other string to indicate this is a physical port.
57 char *port_names[DSA_MAX_PORTS];
58 struct device_node *port_dn[DSA_MAX_PORTS];
61 * An array (with nr_chips elements) of which element [a]
62 * indicates which port on this switch should be used to
63 * send packets to that are destined for switch a. Can be
64 * NULL if there is only one switch chip.
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;
77 * Info structs describing each of the switch chips
78 * connected via this network interface.
81 struct dsa_chip_data *chip;
86 struct dsa_switch_tree {
88 * Configuration data for the platform device that owns
89 * this dsa switch tree instance.
91 struct dsa_platform_data *pd;
94 * Reference to network device to use, and which tagging
97 struct net_device *master_netdev;
98 int (*rcv)(struct sk_buff *skb,
99 struct net_device *dev,
100 struct packet_type *pt,
101 struct net_device *orig_dev);
102 enum dsa_tag_protocol tag_protocol;
105 * The switch and port to which the CPU is attached.
111 * Link state polling.
113 int link_poll_needed;
114 struct work_struct link_poll_work;
115 struct timer_list link_poll_timer;
118 * Data for the individual switch chips.
120 struct dsa_switch *ds[DSA_MAX_SWITCHES];
125 * Parent switch tree, and switch index.
127 struct dsa_switch_tree *dst;
131 * Configuration data for this switch.
133 struct dsa_chip_data *pd;
136 * The used switch driver.
138 struct dsa_switch_driver *drv;
141 * Reference to host device to use.
143 struct device *master_dev;
145 #ifdef CONFIG_NET_DSA_HWMON
147 * Hardware monitoring information
149 char hwmon_name[IFNAMSIZ + 8];
150 struct device *hwmon_dev;
154 * Slave mii_bus and devices for the individual ports.
159 struct mii_bus *slave_mii_bus;
160 struct net_device *ports[DSA_MAX_PORTS];
163 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
165 return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port);
168 static inline u8 dsa_upstream_port(struct dsa_switch *ds)
170 struct dsa_switch_tree *dst = ds->dst;
173 * If this is the root switch (i.e. the switch that connects
174 * to the CPU), return the cpu port number on this switch.
175 * Else return the (DSA) port number that connects to the
176 * switch that is one hop closer to the cpu.
178 if (dst->cpu_switch == ds->index)
179 return dst->cpu_port;
181 return ds->pd->rtable[dst->cpu_switch];
184 struct dsa_switch_driver {
185 struct list_head list;
187 enum dsa_tag_protocol tag_protocol;
193 char *(*probe)(struct device *host_dev, int sw_addr);
194 int (*setup)(struct dsa_switch *ds);
195 int (*set_addr)(struct dsa_switch *ds, u8 *addr);
196 u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
199 * Access to the switch's PHY registers.
201 int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
202 int (*phy_write)(struct dsa_switch *ds, int port,
203 int regnum, u16 val);
206 * Link state polling and IRQ handling.
208 void (*poll_link)(struct dsa_switch *ds);
211 * Link state adjustment (called from libphy)
213 void (*adjust_link)(struct dsa_switch *ds, int port,
214 struct phy_device *phydev);
215 void (*fixed_link_update)(struct dsa_switch *ds, int port,
216 struct fixed_phy_status *st);
219 * ethtool hardware statistics.
221 void (*get_strings)(struct dsa_switch *ds, int port, uint8_t *data);
222 void (*get_ethtool_stats)(struct dsa_switch *ds,
223 int port, uint64_t *data);
224 int (*get_sset_count)(struct dsa_switch *ds);
227 * ethtool Wake-on-LAN
229 void (*get_wol)(struct dsa_switch *ds, int port,
230 struct ethtool_wolinfo *w);
231 int (*set_wol)(struct dsa_switch *ds, int port,
232 struct ethtool_wolinfo *w);
237 int (*suspend)(struct dsa_switch *ds);
238 int (*resume)(struct dsa_switch *ds);
241 * Port enable/disable
243 int (*port_enable)(struct dsa_switch *ds, int port,
244 struct phy_device *phy);
245 void (*port_disable)(struct dsa_switch *ds, int port,
246 struct phy_device *phy);
251 int (*set_eee)(struct dsa_switch *ds, int port,
252 struct phy_device *phydev,
253 struct ethtool_eee *e);
254 int (*get_eee)(struct dsa_switch *ds, int port,
255 struct ethtool_eee *e);
257 #ifdef CONFIG_NET_DSA_HWMON
258 /* Hardware monitoring */
259 int (*get_temp)(struct dsa_switch *ds, int *temp);
260 int (*get_temp_limit)(struct dsa_switch *ds, int *temp);
261 int (*set_temp_limit)(struct dsa_switch *ds, int temp);
262 int (*get_temp_alarm)(struct dsa_switch *ds, bool *alarm);
266 int (*get_eeprom_len)(struct dsa_switch *ds);
267 int (*get_eeprom)(struct dsa_switch *ds,
268 struct ethtool_eeprom *eeprom, u8 *data);
269 int (*set_eeprom)(struct dsa_switch *ds,
270 struct ethtool_eeprom *eeprom, u8 *data);
275 int (*get_regs_len)(struct dsa_switch *ds, int port);
276 void (*get_regs)(struct dsa_switch *ds, int port,
277 struct ethtool_regs *regs, void *p);
282 int (*port_join_bridge)(struct dsa_switch *ds, int port,
284 int (*port_leave_bridge)(struct dsa_switch *ds, int port,
286 int (*port_stp_update)(struct dsa_switch *ds, int port,
290 void register_switch_driver(struct dsa_switch_driver *type);
291 void unregister_switch_driver(struct dsa_switch_driver *type);
292 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev);
294 static inline void *ds_to_priv(struct dsa_switch *ds)
296 return (void *)(ds + 1);
299 static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst)
301 return dst->rcv != NULL;