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 /* Device tree node pointer for this specific switch chip
42 * used during switch setup in case additional properties
43 * and resources needs to be used
45 struct device_node *of_node;
48 * The names of the switch's ports. Use "cpu" to
49 * designate the switch port that the cpu is connected to,
50 * "dsa" to indicate that this port is a DSA link to
51 * another switch, NULL to indicate the port is unused,
52 * or any other string to indicate this is a physical port.
54 char *port_names[DSA_MAX_PORTS];
55 struct device_node *port_dn[DSA_MAX_PORTS];
58 * An array (with nr_chips elements) of which element [a]
59 * indicates which port on this switch should be used to
60 * send packets to that are destined for switch a. Can be
61 * NULL if there is only one switch chip.
66 struct dsa_platform_data {
68 * Reference to a Linux network interface that connects
69 * to the root switch chip of the tree.
71 struct device *netdev;
74 * Info structs describing each of the switch chips
75 * connected via this network interface.
78 struct dsa_chip_data *chip;
83 struct dsa_switch_tree {
85 * Configuration data for the platform device that owns
86 * this dsa switch tree instance.
88 struct dsa_platform_data *pd;
91 * Reference to network device to use, and which tagging
94 struct net_device *master_netdev;
95 int (*rcv)(struct sk_buff *skb,
96 struct net_device *dev,
97 struct packet_type *pt,
98 struct net_device *orig_dev);
99 enum dsa_tag_protocol tag_protocol;
102 * The switch and port to which the CPU is attached.
108 * Link state polling.
110 int link_poll_needed;
111 struct work_struct link_poll_work;
112 struct timer_list link_poll_timer;
115 * Data for the individual switch chips.
117 struct dsa_switch *ds[DSA_MAX_SWITCHES];
122 * Parent switch tree, and switch index.
124 struct dsa_switch_tree *dst;
128 * Configuration data for this switch.
130 struct dsa_chip_data *pd;
133 * The used switch driver.
135 struct dsa_switch_driver *drv;
138 * Reference to host device to use.
140 struct device *master_dev;
143 * Slave mii_bus and devices for the individual ports.
148 struct mii_bus *slave_mii_bus;
149 struct net_device *ports[DSA_MAX_PORTS];
152 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
154 return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port);
157 static inline u8 dsa_upstream_port(struct dsa_switch *ds)
159 struct dsa_switch_tree *dst = ds->dst;
162 * If this is the root switch (i.e. the switch that connects
163 * to the CPU), return the cpu port number on this switch.
164 * Else return the (DSA) port number that connects to the
165 * switch that is one hop closer to the cpu.
167 if (dst->cpu_switch == ds->index)
168 return dst->cpu_port;
170 return ds->pd->rtable[dst->cpu_switch];
173 struct dsa_switch_driver {
174 struct list_head list;
176 enum dsa_tag_protocol tag_protocol;
182 char *(*probe)(struct device *host_dev, int sw_addr);
183 int (*setup)(struct dsa_switch *ds);
184 int (*set_addr)(struct dsa_switch *ds, u8 *addr);
185 u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
188 * Access to the switch's PHY registers.
190 int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
191 int (*phy_write)(struct dsa_switch *ds, int port,
192 int regnum, u16 val);
195 * Link state polling and IRQ handling.
197 void (*poll_link)(struct dsa_switch *ds);
200 * Link state adjustment (called from libphy)
202 void (*adjust_link)(struct dsa_switch *ds, int port,
203 struct phy_device *phydev);
204 void (*fixed_link_update)(struct dsa_switch *ds, int port,
205 struct fixed_phy_status *st);
208 * ethtool hardware statistics.
210 void (*get_strings)(struct dsa_switch *ds, int port, uint8_t *data);
211 void (*get_ethtool_stats)(struct dsa_switch *ds,
212 int port, uint64_t *data);
213 int (*get_sset_count)(struct dsa_switch *ds);
216 * ethtool Wake-on-LAN
218 void (*get_wol)(struct dsa_switch *ds, int port,
219 struct ethtool_wolinfo *w);
220 int (*set_wol)(struct dsa_switch *ds, int port,
221 struct ethtool_wolinfo *w);
226 int (*suspend)(struct dsa_switch *ds);
227 int (*resume)(struct dsa_switch *ds);
230 * Port enable/disable
232 int (*port_enable)(struct dsa_switch *ds, int port,
233 struct phy_device *phy);
234 void (*port_disable)(struct dsa_switch *ds, int port,
235 struct phy_device *phy);
240 int (*set_eee)(struct dsa_switch *ds, int port,
241 struct phy_device *phydev,
242 struct ethtool_eee *e);
243 int (*get_eee)(struct dsa_switch *ds, int port,
244 struct ethtool_eee *e);
247 void register_switch_driver(struct dsa_switch_driver *type);
248 void unregister_switch_driver(struct dsa_switch_driver *type);
249 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev);
251 static inline void *ds_to_priv(struct dsa_switch *ds)
253 return (void *)(ds + 1);
256 static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst)
258 return dst->rcv != NULL;