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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> |
cc30c163 | 19 | #include <linux/of_gpio.h> |
ec9436ba | 20 | #include <linux/phy.h> |
ce31b31c | 21 | #include <linux/phy_fixed.h> |
a2820543 | 22 | #include <linux/ethtool.h> |
cf50dcc2 | 23 | |
ac7a04c3 FF |
24 | enum dsa_tag_protocol { |
25 | DSA_TAG_PROTO_NONE = 0, | |
26 | DSA_TAG_PROTO_DSA, | |
27 | DSA_TAG_PROTO_TRAILER, | |
28 | DSA_TAG_PROTO_EDSA, | |
29 | DSA_TAG_PROTO_BRCM, | |
30 | }; | |
5037d532 | 31 | |
e84665c9 LB |
32 | #define DSA_MAX_SWITCHES 4 |
33 | #define DSA_MAX_PORTS 12 | |
34 | ||
35 | struct dsa_chip_data { | |
36 | /* | |
37 | * How to access the switch configuration registers. | |
38 | */ | |
b4d2394d | 39 | struct device *host_dev; |
e84665c9 LB |
40 | int sw_addr; |
41 | ||
6793abb4 GR |
42 | /* set to size of eeprom if supported by the switch */ |
43 | int eeprom_len; | |
44 | ||
fa981d9a FF |
45 | /* Device tree node pointer for this specific switch chip |
46 | * used during switch setup in case additional properties | |
47 | * and resources needs to be used | |
48 | */ | |
49 | struct device_node *of_node; | |
50 | ||
e84665c9 LB |
51 | /* |
52 | * The names of the switch's ports. Use "cpu" to | |
53 | * designate the switch port that the cpu is connected to, | |
54 | * "dsa" to indicate that this port is a DSA link to | |
55 | * another switch, NULL to indicate the port is unused, | |
56 | * or any other string to indicate this is a physical port. | |
57 | */ | |
58 | char *port_names[DSA_MAX_PORTS]; | |
bd47497a | 59 | struct device_node *port_dn[DSA_MAX_PORTS]; |
e84665c9 LB |
60 | |
61 | /* | |
62 | * An array (with nr_chips elements) of which element [a] | |
63 | * indicates which port on this switch should be used to | |
64 | * send packets to that are destined for switch a. Can be | |
65 | * NULL if there is only one switch chip. | |
66 | */ | |
67 | s8 *rtable; | |
cc30c163 AL |
68 | |
69 | /* | |
70 | * A switch may have a GPIO line tied to its reset pin. Parse | |
71 | * this from the device tree, and use it before performing | |
72 | * switch soft reset. | |
73 | */ | |
74 | struct gpio_desc *reset; | |
e84665c9 | 75 | }; |
91da11f8 LB |
76 | |
77 | struct dsa_platform_data { | |
78 | /* | |
79 | * Reference to a Linux network interface that connects | |
e84665c9 | 80 | * to the root switch chip of the tree. |
91da11f8 LB |
81 | */ |
82 | struct device *netdev; | |
769a0202 | 83 | struct net_device *of_netdev; |
91da11f8 LB |
84 | |
85 | /* | |
e84665c9 LB |
86 | * Info structs describing each of the switch chips |
87 | * connected via this network interface. | |
91da11f8 | 88 | */ |
e84665c9 LB |
89 | int nr_chips; |
90 | struct dsa_chip_data *chip; | |
91da11f8 LB |
91 | }; |
92 | ||
5075314e | 93 | struct packet_type; |
3e8a72d1 | 94 | |
cf50dcc2 BH |
95 | struct dsa_switch_tree { |
96 | /* | |
97 | * Configuration data for the platform device that owns | |
98 | * this dsa switch tree instance. | |
99 | */ | |
100 | struct dsa_platform_data *pd; | |
101 | ||
102 | /* | |
103 | * Reference to network device to use, and which tagging | |
104 | * protocol to use. | |
105 | */ | |
106 | struct net_device *master_netdev; | |
5075314e AD |
107 | int (*rcv)(struct sk_buff *skb, |
108 | struct net_device *dev, | |
109 | struct packet_type *pt, | |
110 | struct net_device *orig_dev); | |
ac7a04c3 | 111 | enum dsa_tag_protocol tag_protocol; |
cf50dcc2 BH |
112 | |
113 | /* | |
114 | * The switch and port to which the CPU is attached. | |
115 | */ | |
116 | s8 cpu_switch; | |
117 | s8 cpu_port; | |
118 | ||
cf50dcc2 BH |
119 | /* |
120 | * Data for the individual switch chips. | |
121 | */ | |
122 | struct dsa_switch *ds[DSA_MAX_SWITCHES]; | |
123 | }; | |
124 | ||
c8f0b869 BH |
125 | struct dsa_switch { |
126 | /* | |
127 | * Parent switch tree, and switch index. | |
128 | */ | |
129 | struct dsa_switch_tree *dst; | |
130 | int index; | |
131 | ||
7543a6d5 AL |
132 | /* |
133 | * Give the switch driver somewhere to hang its private data | |
134 | * structure. | |
135 | */ | |
136 | void *priv; | |
137 | ||
59299031 FF |
138 | /* |
139 | * Tagging protocol understood by this switch | |
140 | */ | |
141 | enum dsa_tag_protocol tag_protocol; | |
142 | ||
c8f0b869 BH |
143 | /* |
144 | * Configuration data for this switch. | |
145 | */ | |
146 | struct dsa_chip_data *pd; | |
147 | ||
148 | /* | |
149 | * The used switch driver. | |
150 | */ | |
151 | struct dsa_switch_driver *drv; | |
152 | ||
153 | /* | |
b4d2394d | 154 | * Reference to host device to use. |
c8f0b869 | 155 | */ |
b4d2394d | 156 | struct device *master_dev; |
c8f0b869 | 157 | |
51579c3f GR |
158 | #ifdef CONFIG_NET_DSA_HWMON |
159 | /* | |
160 | * Hardware monitoring information | |
161 | */ | |
162 | char hwmon_name[IFNAMSIZ + 8]; | |
163 | struct device *hwmon_dev; | |
164 | #endif | |
165 | ||
c8f0b869 BH |
166 | /* |
167 | * Slave mii_bus and devices for the individual ports. | |
168 | */ | |
169 | u32 dsa_port_mask; | |
74c3e2a5 | 170 | u32 enabled_port_mask; |
0d8bcdd3 | 171 | u32 phys_mii_mask; |
c8f0b869 BH |
172 | struct mii_bus *slave_mii_bus; |
173 | struct net_device *ports[DSA_MAX_PORTS]; | |
174 | }; | |
175 | ||
176 | static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p) | |
177 | { | |
178 | return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port); | |
179 | } | |
180 | ||
60045cbf AL |
181 | static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p) |
182 | { | |
183 | return !!((ds->dsa_port_mask) & (1 << p)); | |
184 | } | |
185 | ||
d79d2107 GR |
186 | static inline bool dsa_is_port_initialized(struct dsa_switch *ds, int p) |
187 | { | |
74c3e2a5 | 188 | return ds->enabled_port_mask & (1 << p) && ds->ports[p]; |
d79d2107 GR |
189 | } |
190 | ||
c8f0b869 BH |
191 | static inline u8 dsa_upstream_port(struct dsa_switch *ds) |
192 | { | |
193 | struct dsa_switch_tree *dst = ds->dst; | |
194 | ||
195 | /* | |
196 | * If this is the root switch (i.e. the switch that connects | |
197 | * to the CPU), return the cpu port number on this switch. | |
198 | * Else return the (DSA) port number that connects to the | |
199 | * switch that is one hop closer to the cpu. | |
200 | */ | |
201 | if (dst->cpu_switch == ds->index) | |
202 | return dst->cpu_port; | |
203 | else | |
204 | return ds->pd->rtable[dst->cpu_switch]; | |
205 | } | |
206 | ||
146a3206 | 207 | struct switchdev_trans; |
ea70ba98 | 208 | struct switchdev_obj; |
146a3206 | 209 | struct switchdev_obj_port_fdb; |
76e398a6 | 210 | struct switchdev_obj_port_vlan; |
146a3206 | 211 | |
c8f0b869 BH |
212 | struct dsa_switch_driver { |
213 | struct list_head list; | |
214 | ||
ac7a04c3 | 215 | enum dsa_tag_protocol tag_protocol; |
c8f0b869 BH |
216 | |
217 | /* | |
218 | * Probing and setup. | |
219 | */ | |
bbb8d793 | 220 | char *(*probe)(struct device *dsa_dev, struct device *host_dev, |
7543a6d5 | 221 | int sw_addr, void **priv); |
c8f0b869 BH |
222 | int (*setup)(struct dsa_switch *ds); |
223 | int (*set_addr)(struct dsa_switch *ds, u8 *addr); | |
6819563e | 224 | u32 (*get_phy_flags)(struct dsa_switch *ds, int port); |
c8f0b869 BH |
225 | |
226 | /* | |
227 | * Access to the switch's PHY registers. | |
228 | */ | |
229 | int (*phy_read)(struct dsa_switch *ds, int port, int regnum); | |
230 | int (*phy_write)(struct dsa_switch *ds, int port, | |
231 | int regnum, u16 val); | |
232 | ||
ec9436ba FF |
233 | /* |
234 | * Link state adjustment (called from libphy) | |
235 | */ | |
236 | void (*adjust_link)(struct dsa_switch *ds, int port, | |
237 | struct phy_device *phydev); | |
ce31b31c FF |
238 | void (*fixed_link_update)(struct dsa_switch *ds, int port, |
239 | struct fixed_phy_status *st); | |
ec9436ba | 240 | |
c8f0b869 BH |
241 | /* |
242 | * ethtool hardware statistics. | |
243 | */ | |
244 | void (*get_strings)(struct dsa_switch *ds, int port, uint8_t *data); | |
245 | void (*get_ethtool_stats)(struct dsa_switch *ds, | |
246 | int port, uint64_t *data); | |
247 | int (*get_sset_count)(struct dsa_switch *ds); | |
24462549 | 248 | |
19e57c4e FF |
249 | /* |
250 | * ethtool Wake-on-LAN | |
251 | */ | |
252 | void (*get_wol)(struct dsa_switch *ds, int port, | |
253 | struct ethtool_wolinfo *w); | |
254 | int (*set_wol)(struct dsa_switch *ds, int port, | |
255 | struct ethtool_wolinfo *w); | |
256 | ||
24462549 FF |
257 | /* |
258 | * Suspend and resume | |
259 | */ | |
260 | int (*suspend)(struct dsa_switch *ds); | |
261 | int (*resume)(struct dsa_switch *ds); | |
b2f2af21 FF |
262 | |
263 | /* | |
264 | * Port enable/disable | |
265 | */ | |
266 | int (*port_enable)(struct dsa_switch *ds, int port, | |
267 | struct phy_device *phy); | |
268 | void (*port_disable)(struct dsa_switch *ds, int port, | |
269 | struct phy_device *phy); | |
7905288f FF |
270 | |
271 | /* | |
272 | * EEE setttings | |
273 | */ | |
274 | int (*set_eee)(struct dsa_switch *ds, int port, | |
275 | struct phy_device *phydev, | |
276 | struct ethtool_eee *e); | |
277 | int (*get_eee)(struct dsa_switch *ds, int port, | |
278 | struct ethtool_eee *e); | |
51579c3f GR |
279 | |
280 | #ifdef CONFIG_NET_DSA_HWMON | |
281 | /* Hardware monitoring */ | |
282 | int (*get_temp)(struct dsa_switch *ds, int *temp); | |
283 | int (*get_temp_limit)(struct dsa_switch *ds, int *temp); | |
284 | int (*set_temp_limit)(struct dsa_switch *ds, int temp); | |
285 | int (*get_temp_alarm)(struct dsa_switch *ds, bool *alarm); | |
286 | #endif | |
6793abb4 GR |
287 | |
288 | /* EEPROM access */ | |
289 | int (*get_eeprom_len)(struct dsa_switch *ds); | |
290 | int (*get_eeprom)(struct dsa_switch *ds, | |
291 | struct ethtool_eeprom *eeprom, u8 *data); | |
292 | int (*set_eeprom)(struct dsa_switch *ds, | |
293 | struct ethtool_eeprom *eeprom, u8 *data); | |
3d762a0f GR |
294 | |
295 | /* | |
296 | * Register access. | |
297 | */ | |
298 | int (*get_regs_len)(struct dsa_switch *ds, int port); | |
299 | void (*get_regs)(struct dsa_switch *ds, int port, | |
300 | struct ethtool_regs *regs, void *p); | |
b73adef6 FF |
301 | |
302 | /* | |
303 | * Bridge integration | |
304 | */ | |
71327a4e | 305 | int (*port_bridge_join)(struct dsa_switch *ds, int port, |
a6692754 | 306 | struct net_device *bridge); |
16bfa702 | 307 | void (*port_bridge_leave)(struct dsa_switch *ds, int port); |
43c44a9f VD |
308 | void (*port_stp_state_set)(struct dsa_switch *ds, int port, |
309 | u8 state); | |
2a778e1b | 310 | |
11149536 VD |
311 | /* |
312 | * VLAN support | |
313 | */ | |
fb2dabad VD |
314 | int (*port_vlan_filtering)(struct dsa_switch *ds, int port, |
315 | bool vlan_filtering); | |
76e398a6 VD |
316 | int (*port_vlan_prepare)(struct dsa_switch *ds, int port, |
317 | const struct switchdev_obj_port_vlan *vlan, | |
318 | struct switchdev_trans *trans); | |
4d5770b3 | 319 | void (*port_vlan_add)(struct dsa_switch *ds, int port, |
76e398a6 VD |
320 | const struct switchdev_obj_port_vlan *vlan, |
321 | struct switchdev_trans *trans); | |
322 | int (*port_vlan_del)(struct dsa_switch *ds, int port, | |
323 | const struct switchdev_obj_port_vlan *vlan); | |
65aebfc0 VD |
324 | int (*port_vlan_dump)(struct dsa_switch *ds, int port, |
325 | struct switchdev_obj_port_vlan *vlan, | |
326 | int (*cb)(struct switchdev_obj *obj)); | |
11149536 | 327 | |
2a778e1b VD |
328 | /* |
329 | * Forwarding database | |
330 | */ | |
146a3206 VD |
331 | int (*port_fdb_prepare)(struct dsa_switch *ds, int port, |
332 | const struct switchdev_obj_port_fdb *fdb, | |
333 | struct switchdev_trans *trans); | |
8497aa61 | 334 | void (*port_fdb_add)(struct dsa_switch *ds, int port, |
1f36faf2 VD |
335 | const struct switchdev_obj_port_fdb *fdb, |
336 | struct switchdev_trans *trans); | |
2a778e1b | 337 | int (*port_fdb_del)(struct dsa_switch *ds, int port, |
8057b3e7 | 338 | const struct switchdev_obj_port_fdb *fdb); |
ea70ba98 VD |
339 | int (*port_fdb_dump)(struct dsa_switch *ds, int port, |
340 | struct switchdev_obj_port_fdb *fdb, | |
341 | int (*cb)(struct switchdev_obj *obj)); | |
c8f0b869 BH |
342 | }; |
343 | ||
344 | void register_switch_driver(struct dsa_switch_driver *type); | |
345 | void unregister_switch_driver(struct dsa_switch_driver *type); | |
b4d2394d | 346 | struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev); |
c8f0b869 | 347 | |
7fa857ed FF |
348 | static inline void *ds_to_priv(struct dsa_switch *ds) |
349 | { | |
7543a6d5 | 350 | return ds->priv; |
7fa857ed FF |
351 | } |
352 | ||
5aed85ce FF |
353 | static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst) |
354 | { | |
5075314e | 355 | return dst->rcv != NULL; |
5aed85ce | 356 | } |
91da11f8 | 357 | #endif |