Merge branch 'ipv6-gre-offloads'
[deliverable/linux.git] / include / net / dsa.h
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1/*
2 * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
e84665c9 3 * Copyright (c) 2008-2009 Marvell Semiconductor
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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>
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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
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24enum 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
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32#define DSA_MAX_SWITCHES 4
33#define DSA_MAX_PORTS 12
34
35struct dsa_chip_data {
36 /*
37 * How to access the switch configuration registers.
38 */
b4d2394d 39 struct device *host_dev;
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40 int sw_addr;
41
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42 /* set to size of eeprom if supported by the switch */
43 int eeprom_len;
44
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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
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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];
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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;
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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};
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76
77struct dsa_platform_data {
78 /*
79 * Reference to a Linux network interface that connects
e84665c9 80 * to the root switch chip of the tree.
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81 */
82 struct device *netdev;
769a0202 83 struct net_device *of_netdev;
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84
85 /*
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86 * Info structs describing each of the switch chips
87 * connected via this network interface.
91da11f8 88 */
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89 int nr_chips;
90 struct dsa_chip_data *chip;
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91};
92
5075314e 93struct packet_type;
3e8a72d1 94
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95struct 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;
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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;
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112
113 /*
114 * The switch and port to which the CPU is attached.
115 */
116 s8 cpu_switch;
117 s8 cpu_port;
118
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119 /*
120 * Data for the individual switch chips.
121 */
122 struct dsa_switch *ds[DSA_MAX_SWITCHES];
123};
124
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125struct dsa_switch {
126 /*
127 * Parent switch tree, and switch index.
128 */
129 struct dsa_switch_tree *dst;
130 int index;
131
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132 /*
133 * Give the switch driver somewhere to hang its private data
134 * structure.
135 */
136 void *priv;
137
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138 /*
139 * Tagging protocol understood by this switch
140 */
141 enum dsa_tag_protocol tag_protocol;
142
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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
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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
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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;
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172 struct mii_bus *slave_mii_bus;
173 struct net_device *ports[DSA_MAX_PORTS];
174};
175
176static 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
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181static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
182{
183 return !!((ds->dsa_port_mask) & (1 << p));
184}
185
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186static 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];
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189}
190
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191static 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 207struct switchdev_trans;
ea70ba98 208struct switchdev_obj;
146a3206 209struct switchdev_obj_port_fdb;
76e398a6 210struct switchdev_obj_port_vlan;
146a3206 211
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212struct dsa_switch_driver {
213 struct list_head list;
214
ac7a04c3 215 enum dsa_tag_protocol tag_protocol;
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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);
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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);
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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
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233 /*
234 * Link state adjustment (called from libphy)
235 */
236 void (*adjust_link)(struct dsa_switch *ds, int port,
237 struct phy_device *phydev);
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238 void (*fixed_link_update)(struct dsa_switch *ds, int port,
239 struct fixed_phy_status *st);
ec9436ba 240
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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
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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
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257 /*
258 * Suspend and resume
259 */
260 int (*suspend)(struct dsa_switch *ds);
261 int (*resume)(struct dsa_switch *ds);
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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);
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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);
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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
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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);
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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);
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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);
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308 void (*port_stp_state_set)(struct dsa_switch *ds, int port,
309 u8 state);
2a778e1b 310
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311 /*
312 * VLAN support
313 */
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314 int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
315 bool vlan_filtering);
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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,
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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);
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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
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328 /*
329 * Forwarding database
330 */
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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,
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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);
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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));
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342};
343
344void register_switch_driver(struct dsa_switch_driver *type);
345void unregister_switch_driver(struct dsa_switch_driver *type);
b4d2394d 346struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev);
c8f0b869 347
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348static inline void *ds_to_priv(struct dsa_switch *ds)
349{
7543a6d5 350 return ds->priv;
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351}
352
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353static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst)
354{
5075314e 355 return dst->rcv != NULL;
5aed85ce 356}
91da11f8 357#endif
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