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
);
280 void register_switch_driver(struct dsa_switch_driver
*type
);
281 void unregister_switch_driver(struct dsa_switch_driver
*type
);
282 struct mii_bus
*dsa_host_dev_to_mii_bus(struct device
*dev
);
284 static inline void *ds_to_priv(struct dsa_switch
*ds
)
286 return (void *)(ds
+ 1);
289 static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree
*dst
)
291 return dst
->rcv
!= NULL
;