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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> |
ec9436ba | 19 | #include <linux/phy.h> |
ce31b31c | 20 | #include <linux/phy_fixed.h> |
cf50dcc2 | 21 | |
ac7a04c3 FF |
22 | enum dsa_tag_protocol { |
23 | DSA_TAG_PROTO_NONE = 0, | |
24 | DSA_TAG_PROTO_DSA, | |
25 | DSA_TAG_PROTO_TRAILER, | |
26 | DSA_TAG_PROTO_EDSA, | |
27 | DSA_TAG_PROTO_BRCM, | |
28 | }; | |
5037d532 | 29 | |
e84665c9 LB |
30 | #define DSA_MAX_SWITCHES 4 |
31 | #define DSA_MAX_PORTS 12 | |
32 | ||
33 | struct dsa_chip_data { | |
34 | /* | |
35 | * How to access the switch configuration registers. | |
36 | */ | |
b4d2394d | 37 | struct device *host_dev; |
e84665c9 LB |
38 | int sw_addr; |
39 | ||
fa981d9a FF |
40 | /* Device tree node pointer for this specific switch chip |
41 | * used during switch setup in case additional properties | |
42 | * and resources needs to be used | |
43 | */ | |
44 | struct device_node *of_node; | |
45 | ||
e84665c9 LB |
46 | /* |
47 | * The names of the switch's ports. Use "cpu" to | |
48 | * designate the switch port that the cpu is connected to, | |
49 | * "dsa" to indicate that this port is a DSA link to | |
50 | * another switch, NULL to indicate the port is unused, | |
51 | * or any other string to indicate this is a physical port. | |
52 | */ | |
53 | char *port_names[DSA_MAX_PORTS]; | |
bd47497a | 54 | struct device_node *port_dn[DSA_MAX_PORTS]; |
e84665c9 LB |
55 | |
56 | /* | |
57 | * An array (with nr_chips elements) of which element [a] | |
58 | * indicates which port on this switch should be used to | |
59 | * send packets to that are destined for switch a. Can be | |
60 | * NULL if there is only one switch chip. | |
61 | */ | |
62 | s8 *rtable; | |
63 | }; | |
91da11f8 LB |
64 | |
65 | struct dsa_platform_data { | |
66 | /* | |
67 | * Reference to a Linux network interface that connects | |
e84665c9 | 68 | * to the root switch chip of the tree. |
91da11f8 LB |
69 | */ |
70 | struct device *netdev; | |
71 | ||
72 | /* | |
e84665c9 LB |
73 | * Info structs describing each of the switch chips |
74 | * connected via this network interface. | |
91da11f8 | 75 | */ |
e84665c9 LB |
76 | int nr_chips; |
77 | struct dsa_chip_data *chip; | |
91da11f8 LB |
78 | }; |
79 | ||
5075314e | 80 | struct packet_type; |
3e8a72d1 | 81 | |
cf50dcc2 BH |
82 | struct dsa_switch_tree { |
83 | /* | |
84 | * Configuration data for the platform device that owns | |
85 | * this dsa switch tree instance. | |
86 | */ | |
87 | struct dsa_platform_data *pd; | |
88 | ||
89 | /* | |
90 | * Reference to network device to use, and which tagging | |
91 | * protocol to use. | |
92 | */ | |
93 | struct net_device *master_netdev; | |
5075314e AD |
94 | int (*rcv)(struct sk_buff *skb, |
95 | struct net_device *dev, | |
96 | struct packet_type *pt, | |
97 | struct net_device *orig_dev); | |
ac7a04c3 | 98 | enum dsa_tag_protocol tag_protocol; |
cf50dcc2 BH |
99 | |
100 | /* | |
101 | * The switch and port to which the CPU is attached. | |
102 | */ | |
103 | s8 cpu_switch; | |
104 | s8 cpu_port; | |
105 | ||
106 | /* | |
107 | * Link state polling. | |
108 | */ | |
109 | int link_poll_needed; | |
110 | struct work_struct link_poll_work; | |
111 | struct timer_list link_poll_timer; | |
112 | ||
113 | /* | |
114 | * Data for the individual switch chips. | |
115 | */ | |
116 | struct dsa_switch *ds[DSA_MAX_SWITCHES]; | |
117 | }; | |
118 | ||
c8f0b869 BH |
119 | struct dsa_switch { |
120 | /* | |
121 | * Parent switch tree, and switch index. | |
122 | */ | |
123 | struct dsa_switch_tree *dst; | |
124 | int index; | |
125 | ||
126 | /* | |
127 | * Configuration data for this switch. | |
128 | */ | |
129 | struct dsa_chip_data *pd; | |
130 | ||
131 | /* | |
132 | * The used switch driver. | |
133 | */ | |
134 | struct dsa_switch_driver *drv; | |
135 | ||
136 | /* | |
b4d2394d | 137 | * Reference to host device to use. |
c8f0b869 | 138 | */ |
b4d2394d | 139 | struct device *master_dev; |
c8f0b869 BH |
140 | |
141 | /* | |
142 | * Slave mii_bus and devices for the individual ports. | |
143 | */ | |
144 | u32 dsa_port_mask; | |
145 | u32 phys_port_mask; | |
0d8bcdd3 | 146 | u32 phys_mii_mask; |
c8f0b869 BH |
147 | struct mii_bus *slave_mii_bus; |
148 | struct net_device *ports[DSA_MAX_PORTS]; | |
149 | }; | |
150 | ||
151 | static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) | |
152 | { | |
153 | return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port); | |
154 | } | |
155 | ||
156 | static inline u8 dsa_upstream_port(struct dsa_switch *ds) | |
157 | { | |
158 | struct dsa_switch_tree *dst = ds->dst; | |
159 | ||
160 | /* | |
161 | * If this is the root switch (i.e. the switch that connects | |
162 | * to the CPU), return the cpu port number on this switch. | |
163 | * Else return the (DSA) port number that connects to the | |
164 | * switch that is one hop closer to the cpu. | |
165 | */ | |
166 | if (dst->cpu_switch == ds->index) | |
167 | return dst->cpu_port; | |
168 | else | |
169 | return ds->pd->rtable[dst->cpu_switch]; | |
170 | } | |
171 | ||
172 | struct dsa_switch_driver { | |
173 | struct list_head list; | |
174 | ||
ac7a04c3 | 175 | enum dsa_tag_protocol tag_protocol; |
c8f0b869 BH |
176 | int priv_size; |
177 | ||
178 | /* | |
179 | * Probing and setup. | |
180 | */ | |
b4d2394d | 181 | char *(*probe)(struct device *host_dev, int sw_addr); |
c8f0b869 BH |
182 | int (*setup)(struct dsa_switch *ds); |
183 | int (*set_addr)(struct dsa_switch *ds, u8 *addr); | |
184 | ||
185 | /* | |
186 | * Access to the switch's PHY registers. | |
187 | */ | |
188 | int (*phy_read)(struct dsa_switch *ds, int port, int regnum); | |
189 | int (*phy_write)(struct dsa_switch *ds, int port, | |
190 | int regnum, u16 val); | |
191 | ||
192 | /* | |
193 | * Link state polling and IRQ handling. | |
194 | */ | |
195 | void (*poll_link)(struct dsa_switch *ds); | |
196 | ||
ec9436ba FF |
197 | /* |
198 | * Link state adjustment (called from libphy) | |
199 | */ | |
200 | void (*adjust_link)(struct dsa_switch *ds, int port, | |
201 | struct phy_device *phydev); | |
ce31b31c FF |
202 | void (*fixed_link_update)(struct dsa_switch *ds, int port, |
203 | struct fixed_phy_status *st); | |
ec9436ba | 204 | |
c8f0b869 BH |
205 | /* |
206 | * ethtool hardware statistics. | |
207 | */ | |
208 | void (*get_strings)(struct dsa_switch *ds, int port, uint8_t *data); | |
209 | void (*get_ethtool_stats)(struct dsa_switch *ds, | |
210 | int port, uint64_t *data); | |
211 | int (*get_sset_count)(struct dsa_switch *ds); | |
212 | }; | |
213 | ||
214 | void register_switch_driver(struct dsa_switch_driver *type); | |
215 | void unregister_switch_driver(struct dsa_switch_driver *type); | |
b4d2394d | 216 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev); |
c8f0b869 | 217 | |
7fa857ed FF |
218 | static inline void *ds_to_priv(struct dsa_switch *ds) |
219 | { | |
220 | return (void *)(ds + 1); | |
221 | } | |
222 | ||
5aed85ce FF |
223 | static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst) |
224 | { | |
5075314e | 225 | return dst->rcv != NULL; |
5aed85ce | 226 | } |
91da11f8 | 227 | #endif |