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/of_gpio.h>
20 #include <linux/phy.h>
21 #include <linux/phy_fixed.h>
22 #include <linux/ethtool.h>
24 enum dsa_tag_protocol {
25 DSA_TAG_PROTO_NONE = 0,
27 DSA_TAG_PROTO_TRAILER,
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 (with nr_chips elements) of which element [a]
63 * indicates which port on this switch should be used to
64 * send packets to that are destined for switch a. Can be
65 * NULL if there is only one switch chip.
70 * A switch may have a GPIO line tied to its reset pin. Parse
71 * this from the device tree, and use it before performing
74 struct gpio_desc *reset;
77 struct dsa_platform_data {
79 * Reference to a Linux network interface that connects
80 * to the root switch chip of the tree.
82 struct device *netdev;
83 struct net_device *of_netdev;
86 * Info structs describing each of the switch chips
87 * connected via this network interface.
90 struct dsa_chip_data *chip;
95 struct dsa_switch_tree {
97 * Configuration data for the platform device that owns
98 * this dsa switch tree instance.
100 struct dsa_platform_data *pd;
103 * Reference to network device to use, and which tagging
106 struct net_device *master_netdev;
107 int (*rcv)(struct sk_buff *skb,
108 struct net_device *dev,
109 struct packet_type *pt,
110 struct net_device *orig_dev);
111 enum dsa_tag_protocol tag_protocol;
114 * The switch and port to which the CPU is attached.
120 * Link state polling.
122 int link_poll_needed;
123 struct work_struct link_poll_work;
124 struct timer_list link_poll_timer;
127 * Data for the individual switch chips.
129 struct dsa_switch *ds[DSA_MAX_SWITCHES];
134 * Parent switch tree, and switch index.
136 struct dsa_switch_tree *dst;
140 * Tagging protocol understood by this switch
142 enum dsa_tag_protocol tag_protocol;
145 * Configuration data for this switch.
147 struct dsa_chip_data *pd;
150 * The used switch driver.
152 struct dsa_switch_driver *drv;
155 * Reference to host device to use.
157 struct device *master_dev;
159 #ifdef CONFIG_NET_DSA_HWMON
161 * Hardware monitoring information
163 char hwmon_name[IFNAMSIZ + 8];
164 struct device *hwmon_dev;
168 * Slave mii_bus and devices for the individual ports.
173 struct mii_bus *slave_mii_bus;
174 struct net_device *ports[DSA_MAX_PORTS];
177 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
179 return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port);
182 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
184 return !!((ds->dsa_port_mask) & (1 << p));
187 static inline bool dsa_is_port_initialized(struct dsa_switch *ds, int p)
189 return ds->phys_port_mask & (1 << p) && ds->ports[p];
192 static inline u8 dsa_upstream_port(struct dsa_switch *ds)
194 struct dsa_switch_tree *dst = ds->dst;
197 * If this is the root switch (i.e. the switch that connects
198 * to the CPU), return the cpu port number on this switch.
199 * Else return the (DSA) port number that connects to the
200 * switch that is one hop closer to the cpu.
202 if (dst->cpu_switch == ds->index)
203 return dst->cpu_port;
205 return ds->pd->rtable[dst->cpu_switch];
208 struct switchdev_trans;
209 struct switchdev_obj;
210 struct switchdev_obj_port_fdb;
211 struct switchdev_obj_port_vlan;
213 struct dsa_switch_driver {
214 struct list_head list;
216 enum dsa_tag_protocol tag_protocol;
222 char *(*probe)(struct device *host_dev, int sw_addr);
223 int (*setup)(struct dsa_switch *ds);
224 int (*set_addr)(struct dsa_switch *ds, u8 *addr);
225 u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
228 * Access to the switch's PHY registers.
230 int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
231 int (*phy_write)(struct dsa_switch *ds, int port,
232 int regnum, u16 val);
235 * Link state polling and IRQ handling.
237 void (*poll_link)(struct dsa_switch *ds);
240 * Link state adjustment (called from libphy)
242 void (*adjust_link)(struct dsa_switch *ds, int port,
243 struct phy_device *phydev);
244 void (*fixed_link_update)(struct dsa_switch *ds, int port,
245 struct fixed_phy_status *st);
248 * ethtool hardware statistics.
250 void (*get_strings)(struct dsa_switch *ds, int port, uint8_t *data);
251 void (*get_ethtool_stats)(struct dsa_switch *ds,
252 int port, uint64_t *data);
253 int (*get_sset_count)(struct dsa_switch *ds);
256 * ethtool Wake-on-LAN
258 void (*get_wol)(struct dsa_switch *ds, int port,
259 struct ethtool_wolinfo *w);
260 int (*set_wol)(struct dsa_switch *ds, int port,
261 struct ethtool_wolinfo *w);
266 int (*suspend)(struct dsa_switch *ds);
267 int (*resume)(struct dsa_switch *ds);
270 * Port enable/disable
272 int (*port_enable)(struct dsa_switch *ds, int port,
273 struct phy_device *phy);
274 void (*port_disable)(struct dsa_switch *ds, int port,
275 struct phy_device *phy);
280 int (*set_eee)(struct dsa_switch *ds, int port,
281 struct phy_device *phydev,
282 struct ethtool_eee *e);
283 int (*get_eee)(struct dsa_switch *ds, int port,
284 struct ethtool_eee *e);
286 #ifdef CONFIG_NET_DSA_HWMON
287 /* Hardware monitoring */
288 int (*get_temp)(struct dsa_switch *ds, int *temp);
289 int (*get_temp_limit)(struct dsa_switch *ds, int *temp);
290 int (*set_temp_limit)(struct dsa_switch *ds, int temp);
291 int (*get_temp_alarm)(struct dsa_switch *ds, bool *alarm);
295 int (*get_eeprom_len)(struct dsa_switch *ds);
296 int (*get_eeprom)(struct dsa_switch *ds,
297 struct ethtool_eeprom *eeprom, u8 *data);
298 int (*set_eeprom)(struct dsa_switch *ds,
299 struct ethtool_eeprom *eeprom, u8 *data);
304 int (*get_regs_len)(struct dsa_switch *ds, int port);
305 void (*get_regs)(struct dsa_switch *ds, int port,
306 struct ethtool_regs *regs, void *p);
311 int (*port_join_bridge)(struct dsa_switch *ds, int port,
313 int (*port_leave_bridge)(struct dsa_switch *ds, int port,
315 int (*port_stp_update)(struct dsa_switch *ds, int port,
321 int (*port_vlan_prepare)(struct dsa_switch *ds, int port,
322 const struct switchdev_obj_port_vlan *vlan,
323 struct switchdev_trans *trans);
324 int (*port_vlan_add)(struct dsa_switch *ds, int port,
325 const struct switchdev_obj_port_vlan *vlan,
326 struct switchdev_trans *trans);
327 int (*port_vlan_del)(struct dsa_switch *ds, int port,
328 const struct switchdev_obj_port_vlan *vlan);
329 int (*port_pvid_get)(struct dsa_switch *ds, int port, u16 *pvid);
330 int (*vlan_getnext)(struct dsa_switch *ds, u16 *vid,
331 unsigned long *ports, unsigned long *untagged);
334 * Forwarding database
336 int (*port_fdb_prepare)(struct dsa_switch *ds, int port,
337 const struct switchdev_obj_port_fdb *fdb,
338 struct switchdev_trans *trans);
339 int (*port_fdb_add)(struct dsa_switch *ds, int port,
340 const struct switchdev_obj_port_fdb *fdb,
341 struct switchdev_trans *trans);
342 int (*port_fdb_del)(struct dsa_switch *ds, int port,
343 const struct switchdev_obj_port_fdb *fdb);
344 int (*port_fdb_dump)(struct dsa_switch *ds, int port,
345 struct switchdev_obj_port_fdb *fdb,
346 int (*cb)(struct switchdev_obj *obj));
349 void register_switch_driver(struct dsa_switch_driver *type);
350 void unregister_switch_driver(struct dsa_switch_driver *type);
351 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev);
353 static inline void *ds_to_priv(struct dsa_switch *ds)
355 return (void *)(ds + 1);
358 static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst)
360 return dst->rcv != NULL;