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91da11f8 LB |
1 | /* |
2 | * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips | |
e84665c9 | 3 | * Copyright (c) 2008-2009 Marvell Semiconductor |
91da11f8 LB |
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 __LINUX_NET_DSA_H | |
12 | #define __LINUX_NET_DSA_H | |
13 | ||
ea1f51be | 14 | #include <linux/if_ether.h> |
c8f0b869 | 15 | #include <linux/list.h> |
cf50dcc2 BH |
16 | #include <linux/timer.h> |
17 | #include <linux/workqueue.h> | |
fa981d9a | 18 | #include <linux/of.h> |
cf50dcc2 | 19 | |
e84665c9 LB |
20 | #define DSA_MAX_SWITCHES 4 |
21 | #define DSA_MAX_PORTS 12 | |
22 | ||
23 | struct dsa_chip_data { | |
24 | /* | |
25 | * How to access the switch configuration registers. | |
26 | */ | |
27 | struct device *mii_bus; | |
28 | int sw_addr; | |
29 | ||
fa981d9a FF |
30 | /* Device tree node pointer for this specific switch chip |
31 | * used during switch setup in case additional properties | |
32 | * and resources needs to be used | |
33 | */ | |
34 | struct device_node *of_node; | |
35 | ||
e84665c9 LB |
36 | /* |
37 | * The names of the switch's ports. Use "cpu" to | |
38 | * designate the switch port that the cpu is connected to, | |
39 | * "dsa" to indicate that this port is a DSA link to | |
40 | * another switch, NULL to indicate the port is unused, | |
41 | * or any other string to indicate this is a physical port. | |
42 | */ | |
43 | char *port_names[DSA_MAX_PORTS]; | |
bd47497a | 44 | struct device_node *port_dn[DSA_MAX_PORTS]; |
e84665c9 LB |
45 | |
46 | /* | |
47 | * An array (with nr_chips elements) of which element [a] | |
48 | * indicates which port on this switch should be used to | |
49 | * send packets to that are destined for switch a. Can be | |
50 | * NULL if there is only one switch chip. | |
51 | */ | |
52 | s8 *rtable; | |
53 | }; | |
91da11f8 LB |
54 | |
55 | struct dsa_platform_data { | |
56 | /* | |
57 | * Reference to a Linux network interface that connects | |
e84665c9 | 58 | * to the root switch chip of the tree. |
91da11f8 LB |
59 | */ |
60 | struct device *netdev; | |
61 | ||
62 | /* | |
e84665c9 LB |
63 | * Info structs describing each of the switch chips |
64 | * connected via this network interface. | |
91da11f8 | 65 | */ |
e84665c9 LB |
66 | int nr_chips; |
67 | struct dsa_chip_data *chip; | |
91da11f8 LB |
68 | }; |
69 | ||
3e8a72d1 FF |
70 | struct dsa_device_ops; |
71 | ||
cf50dcc2 BH |
72 | struct dsa_switch_tree { |
73 | /* | |
74 | * Configuration data for the platform device that owns | |
75 | * this dsa switch tree instance. | |
76 | */ | |
77 | struct dsa_platform_data *pd; | |
78 | ||
79 | /* | |
80 | * Reference to network device to use, and which tagging | |
81 | * protocol to use. | |
82 | */ | |
83 | struct net_device *master_netdev; | |
3e8a72d1 | 84 | const struct dsa_device_ops *ops; |
cf50dcc2 BH |
85 | __be16 tag_protocol; |
86 | ||
87 | /* | |
88 | * The switch and port to which the CPU is attached. | |
89 | */ | |
90 | s8 cpu_switch; | |
91 | s8 cpu_port; | |
92 | ||
93 | /* | |
94 | * Link state polling. | |
95 | */ | |
96 | int link_poll_needed; | |
97 | struct work_struct link_poll_work; | |
98 | struct timer_list link_poll_timer; | |
99 | ||
100 | /* | |
101 | * Data for the individual switch chips. | |
102 | */ | |
103 | struct dsa_switch *ds[DSA_MAX_SWITCHES]; | |
104 | }; | |
105 | ||
c8f0b869 BH |
106 | struct dsa_switch { |
107 | /* | |
108 | * Parent switch tree, and switch index. | |
109 | */ | |
110 | struct dsa_switch_tree *dst; | |
111 | int index; | |
112 | ||
113 | /* | |
114 | * Configuration data for this switch. | |
115 | */ | |
116 | struct dsa_chip_data *pd; | |
117 | ||
118 | /* | |
119 | * The used switch driver. | |
120 | */ | |
121 | struct dsa_switch_driver *drv; | |
122 | ||
123 | /* | |
124 | * Reference to mii bus to use. | |
125 | */ | |
126 | struct mii_bus *master_mii_bus; | |
127 | ||
128 | /* | |
129 | * Slave mii_bus and devices for the individual ports. | |
130 | */ | |
131 | u32 dsa_port_mask; | |
132 | u32 phys_port_mask; | |
0d8bcdd3 | 133 | u32 phys_mii_mask; |
c8f0b869 BH |
134 | struct mii_bus *slave_mii_bus; |
135 | struct net_device *ports[DSA_MAX_PORTS]; | |
136 | }; | |
137 | ||
138 | static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) | |
139 | { | |
140 | return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port); | |
141 | } | |
142 | ||
143 | static inline u8 dsa_upstream_port(struct dsa_switch *ds) | |
144 | { | |
145 | struct dsa_switch_tree *dst = ds->dst; | |
146 | ||
147 | /* | |
148 | * If this is the root switch (i.e. the switch that connects | |
149 | * to the CPU), return the cpu port number on this switch. | |
150 | * Else return the (DSA) port number that connects to the | |
151 | * switch that is one hop closer to the cpu. | |
152 | */ | |
153 | if (dst->cpu_switch == ds->index) | |
154 | return dst->cpu_port; | |
155 | else | |
156 | return ds->pd->rtable[dst->cpu_switch]; | |
157 | } | |
158 | ||
159 | struct dsa_switch_driver { | |
160 | struct list_head list; | |
161 | ||
162 | __be16 tag_protocol; | |
163 | int priv_size; | |
164 | ||
165 | /* | |
166 | * Probing and setup. | |
167 | */ | |
168 | char *(*probe)(struct mii_bus *bus, int sw_addr); | |
169 | int (*setup)(struct dsa_switch *ds); | |
170 | int (*set_addr)(struct dsa_switch *ds, u8 *addr); | |
171 | ||
172 | /* | |
173 | * Access to the switch's PHY registers. | |
174 | */ | |
175 | int (*phy_read)(struct dsa_switch *ds, int port, int regnum); | |
176 | int (*phy_write)(struct dsa_switch *ds, int port, | |
177 | int regnum, u16 val); | |
178 | ||
179 | /* | |
180 | * Link state polling and IRQ handling. | |
181 | */ | |
182 | void (*poll_link)(struct dsa_switch *ds); | |
183 | ||
184 | /* | |
185 | * ethtool hardware statistics. | |
186 | */ | |
187 | void (*get_strings)(struct dsa_switch *ds, int port, uint8_t *data); | |
188 | void (*get_ethtool_stats)(struct dsa_switch *ds, | |
189 | int port, uint64_t *data); | |
190 | int (*get_sset_count)(struct dsa_switch *ds); | |
191 | }; | |
192 | ||
193 | void register_switch_driver(struct dsa_switch_driver *type); | |
194 | void unregister_switch_driver(struct dsa_switch_driver *type); | |
195 | ||
7fa857ed FF |
196 | static inline void *ds_to_priv(struct dsa_switch *ds) |
197 | { | |
198 | return (void *)(ds + 1); | |
199 | } | |
200 | ||
5aed85ce FF |
201 | static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst) |
202 | { | |
203 | return dst->tag_protocol != 0; | |
204 | } | |
205 | ||
91da11f8 | 206 | #endif |