dsa_priv.h revision e84665c9cb4db963393fafad6fefe5efdd7e4a09 
1/*
2 * net/dsa/dsa_priv.h - Hardware switch handling
3 * Copyright (c) 2008-2009 Marvell Semiconductor
4 *
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.
9 */
10
11#ifndef __DSA_PRIV_H
12#define __DSA_PRIV_H
13
14#include <linux/list.h>
15#include <linux/phy.h>
16#include <linux/timer.h>
17#include <linux/workqueue.h>
18#include <net/dsa.h>
19
20struct dsa_switch {
21	/*
22	 * Parent switch tree, and switch index.
23	 */
24	struct dsa_switch_tree	*dst;
25	int			index;
26
27	/*
28	 * Configuration data for this switch.
29	 */
30	struct dsa_chip_data	*pd;
31
32	/*
33	 * The used switch driver.
34	 */
35	struct dsa_switch_driver	*drv;
36
37	/*
38	 * Reference to mii bus to use.
39	 */
40	struct mii_bus		*master_mii_bus;
41
42	/*
43	 * Slave mii_bus and devices for the individual ports.
44	 */
45	u32			dsa_port_mask;
46	u32			phys_port_mask;
47	struct mii_bus		*slave_mii_bus;
48	struct net_device	*ports[DSA_MAX_PORTS];
49};
50
51struct dsa_switch_tree {
52	/*
53	 * Configuration data for the platform device that owns
54	 * this dsa switch tree instance.
55	 */
56	struct dsa_platform_data	*pd;
57
58	/*
59	 * Reference to network device to use, and which tagging
60	 * protocol to use.
61	 */
62	struct net_device	*master_netdev;
63	__be16			tag_protocol;
64
65	/*
66	 * The switch and port to which the CPU is attached.
67	 */
68	s8			cpu_switch;
69	s8			cpu_port;
70
71	/*
72	 * Link state polling.
73	 */
74	int			link_poll_needed;
75	struct work_struct	link_poll_work;
76	struct timer_list	link_poll_timer;
77
78	/*
79	 * Data for the individual switch chips.
80	 */
81	struct dsa_switch	*ds[DSA_MAX_SWITCHES];
82};
83
84static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
85{
86	return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port);
87}
88
89static inline u8 dsa_upstream_port(struct dsa_switch *ds)
90{
91	struct dsa_switch_tree *dst = ds->dst;
92
93	/*
94	 * If this is the root switch (i.e. the switch that connects
95	 * to the CPU), return the cpu port number on this switch.
96	 * Else return the (DSA) port number that connects to the
97	 * switch that is one hop closer to the cpu.
98	 */
99	if (dst->cpu_switch == ds->index)
100		return dst->cpu_port;
101	else
102		return ds->pd->rtable[dst->cpu_switch];
103}
104
105struct dsa_slave_priv {
106	/*
107	 * The linux network interface corresponding to this
108	 * switch port.
109	 */
110	struct net_device	*dev;
111
112	/*
113	 * Which switch this port is a part of, and the port index
114	 * for this port.
115	 */
116	struct dsa_switch	*parent;
117	u8			port;
118
119	/*
120	 * The phylib phy_device pointer for the PHY connected
121	 * to this port.
122	 */
123	struct phy_device	*phy;
124};
125
126struct dsa_switch_driver {
127	struct list_head	list;
128
129	__be16			tag_protocol;
130	int			priv_size;
131
132	/*
133	 * Probing and setup.
134	 */
135	char	*(*probe)(struct mii_bus *bus, int sw_addr);
136	int	(*setup)(struct dsa_switch *ds);
137	int	(*set_addr)(struct dsa_switch *ds, u8 *addr);
138
139	/*
140	 * Access to the switch's PHY registers.
141	 */
142	int	(*phy_read)(struct dsa_switch *ds, int port, int regnum);
143	int	(*phy_write)(struct dsa_switch *ds, int port,
144			     int regnum, u16 val);
145
146	/*
147	 * Link state polling and IRQ handling.
148	 */
149	void	(*poll_link)(struct dsa_switch *ds);
150
151	/*
152	 * ethtool hardware statistics.
153	 */
154	void	(*get_strings)(struct dsa_switch *ds, int port, uint8_t *data);
155	void	(*get_ethtool_stats)(struct dsa_switch *ds,
156				     int port, uint64_t *data);
157	int	(*get_sset_count)(struct dsa_switch *ds);
158};
159
160/* dsa.c */
161extern char dsa_driver_version[];
162void register_switch_driver(struct dsa_switch_driver *type);
163void unregister_switch_driver(struct dsa_switch_driver *type);
164
165/* slave.c */
166void dsa_slave_mii_bus_init(struct dsa_switch *ds);
167struct net_device *dsa_slave_create(struct dsa_switch *ds,
168				    struct device *parent,
169				    int port, char *name);
170
171/* tag_dsa.c */
172int dsa_xmit(struct sk_buff *skb, struct net_device *dev);
173
174/* tag_edsa.c */
175int edsa_xmit(struct sk_buff *skb, struct net_device *dev);
176
177/* tag_trailer.c */
178int trailer_xmit(struct sk_buff *skb, struct net_device *dev);
179
180
181#endif
182