Loading...
1/*
2 * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
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 __LINUX_NET_DSA_H
12#define __LINUX_NET_DSA_H
13
14#define DSA_MAX_SWITCHES 4
15#define DSA_MAX_PORTS 12
16
17struct dsa_chip_data {
18 /*
19 * How to access the switch configuration registers.
20 */
21 struct device *mii_bus;
22 int sw_addr;
23
24 /*
25 * The names of the switch's ports. Use "cpu" to
26 * designate the switch port that the cpu is connected to,
27 * "dsa" to indicate that this port is a DSA link to
28 * another switch, NULL to indicate the port is unused,
29 * or any other string to indicate this is a physical port.
30 */
31 char *port_names[DSA_MAX_PORTS];
32
33 /*
34 * An array (with nr_chips elements) of which element [a]
35 * indicates which port on this switch should be used to
36 * send packets to that are destined for switch a. Can be
37 * NULL if there is only one switch chip.
38 */
39 s8 *rtable;
40};
41
42struct dsa_platform_data {
43 /*
44 * Reference to a Linux network interface that connects
45 * to the root switch chip of the tree.
46 */
47 struct device *netdev;
48
49 /*
50 * Info structs describing each of the switch chips
51 * connected via this network interface.
52 */
53 int nr_chips;
54 struct dsa_chip_data *chip;
55};
56
57extern bool dsa_uses_dsa_tags(void *dsa_ptr);
58extern bool dsa_uses_trailer_tags(void *dsa_ptr);
59
60
61#endif
1/*
2 * include/net/dsa.h - Driver for Distributed Switch Architecture switch chips
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 __LINUX_NET_DSA_H
12#define __LINUX_NET_DSA_H
13
14#include <linux/if_ether.h>
15#include <linux/list.h>
16#include <linux/timer.h>
17#include <linux/workqueue.h>
18#include <linux/of.h>
19#include <linux/of_gpio.h>
20#include <linux/phy.h>
21#include <linux/phy_fixed.h>
22#include <linux/ethtool.h>
23
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};
31
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 */
39 struct device *host_dev;
40 int sw_addr;
41
42 /* set to size of eeprom if supported by the switch */
43 int eeprom_len;
44
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
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];
59 struct device_node *port_dn[DSA_MAX_PORTS];
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;
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;
75};
76
77struct dsa_platform_data {
78 /*
79 * Reference to a Linux network interface that connects
80 * to the root switch chip of the tree.
81 */
82 struct device *netdev;
83 struct net_device *of_netdev;
84
85 /*
86 * Info structs describing each of the switch chips
87 * connected via this network interface.
88 */
89 int nr_chips;
90 struct dsa_chip_data *chip;
91};
92
93struct packet_type;
94
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;
107 int (*rcv)(struct sk_buff *skb,
108 struct net_device *dev,
109 struct packet_type *pt,
110 struct net_device *orig_dev);
111 enum dsa_tag_protocol tag_protocol;
112
113 /*
114 * The switch and port to which the CPU is attached.
115 */
116 s8 cpu_switch;
117 s8 cpu_port;
118
119 /*
120 * Data for the individual switch chips.
121 */
122 struct dsa_switch *ds[DSA_MAX_SWITCHES];
123};
124
125struct dsa_switch {
126 /*
127 * Parent switch tree, and switch index.
128 */
129 struct dsa_switch_tree *dst;
130 int index;
131
132 /*
133 * Tagging protocol understood by this switch
134 */
135 enum dsa_tag_protocol tag_protocol;
136
137 /*
138 * Configuration data for this switch.
139 */
140 struct dsa_chip_data *pd;
141
142 /*
143 * The used switch driver.
144 */
145 struct dsa_switch_driver *drv;
146
147 /*
148 * Reference to host device to use.
149 */
150 struct device *master_dev;
151
152#ifdef CONFIG_NET_DSA_HWMON
153 /*
154 * Hardware monitoring information
155 */
156 char hwmon_name[IFNAMSIZ + 8];
157 struct device *hwmon_dev;
158#endif
159
160 /*
161 * Slave mii_bus and devices for the individual ports.
162 */
163 u32 dsa_port_mask;
164 u32 phys_port_mask;
165 u32 phys_mii_mask;
166 struct mii_bus *slave_mii_bus;
167 struct net_device *ports[DSA_MAX_PORTS];
168};
169
170static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
171{
172 return !!(ds->index == ds->dst->cpu_switch && p == ds->dst->cpu_port);
173}
174
175static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
176{
177 return !!((ds->dsa_port_mask) & (1 << p));
178}
179
180static inline bool dsa_is_port_initialized(struct dsa_switch *ds, int p)
181{
182 return ds->phys_port_mask & (1 << p) && ds->ports[p];
183}
184
185static inline u8 dsa_upstream_port(struct dsa_switch *ds)
186{
187 struct dsa_switch_tree *dst = ds->dst;
188
189 /*
190 * If this is the root switch (i.e. the switch that connects
191 * to the CPU), return the cpu port number on this switch.
192 * Else return the (DSA) port number that connects to the
193 * switch that is one hop closer to the cpu.
194 */
195 if (dst->cpu_switch == ds->index)
196 return dst->cpu_port;
197 else
198 return ds->pd->rtable[dst->cpu_switch];
199}
200
201struct switchdev_trans;
202struct switchdev_obj;
203struct switchdev_obj_port_fdb;
204struct switchdev_obj_port_vlan;
205
206struct dsa_switch_driver {
207 struct list_head list;
208
209 enum dsa_tag_protocol tag_protocol;
210 int priv_size;
211
212 /*
213 * Probing and setup.
214 */
215 char *(*probe)(struct device *host_dev, int sw_addr);
216 int (*setup)(struct dsa_switch *ds);
217 int (*set_addr)(struct dsa_switch *ds, u8 *addr);
218 u32 (*get_phy_flags)(struct dsa_switch *ds, int port);
219
220 /*
221 * Access to the switch's PHY registers.
222 */
223 int (*phy_read)(struct dsa_switch *ds, int port, int regnum);
224 int (*phy_write)(struct dsa_switch *ds, int port,
225 int regnum, u16 val);
226
227 /*
228 * Link state adjustment (called from libphy)
229 */
230 void (*adjust_link)(struct dsa_switch *ds, int port,
231 struct phy_device *phydev);
232 void (*fixed_link_update)(struct dsa_switch *ds, int port,
233 struct fixed_phy_status *st);
234
235 /*
236 * ethtool hardware statistics.
237 */
238 void (*get_strings)(struct dsa_switch *ds, int port, uint8_t *data);
239 void (*get_ethtool_stats)(struct dsa_switch *ds,
240 int port, uint64_t *data);
241 int (*get_sset_count)(struct dsa_switch *ds);
242
243 /*
244 * ethtool Wake-on-LAN
245 */
246 void (*get_wol)(struct dsa_switch *ds, int port,
247 struct ethtool_wolinfo *w);
248 int (*set_wol)(struct dsa_switch *ds, int port,
249 struct ethtool_wolinfo *w);
250
251 /*
252 * Suspend and resume
253 */
254 int (*suspend)(struct dsa_switch *ds);
255 int (*resume)(struct dsa_switch *ds);
256
257 /*
258 * Port enable/disable
259 */
260 int (*port_enable)(struct dsa_switch *ds, int port,
261 struct phy_device *phy);
262 void (*port_disable)(struct dsa_switch *ds, int port,
263 struct phy_device *phy);
264
265 /*
266 * EEE setttings
267 */
268 int (*set_eee)(struct dsa_switch *ds, int port,
269 struct phy_device *phydev,
270 struct ethtool_eee *e);
271 int (*get_eee)(struct dsa_switch *ds, int port,
272 struct ethtool_eee *e);
273
274#ifdef CONFIG_NET_DSA_HWMON
275 /* Hardware monitoring */
276 int (*get_temp)(struct dsa_switch *ds, int *temp);
277 int (*get_temp_limit)(struct dsa_switch *ds, int *temp);
278 int (*set_temp_limit)(struct dsa_switch *ds, int temp);
279 int (*get_temp_alarm)(struct dsa_switch *ds, bool *alarm);
280#endif
281
282 /* EEPROM access */
283 int (*get_eeprom_len)(struct dsa_switch *ds);
284 int (*get_eeprom)(struct dsa_switch *ds,
285 struct ethtool_eeprom *eeprom, u8 *data);
286 int (*set_eeprom)(struct dsa_switch *ds,
287 struct ethtool_eeprom *eeprom, u8 *data);
288
289 /*
290 * Register access.
291 */
292 int (*get_regs_len)(struct dsa_switch *ds, int port);
293 void (*get_regs)(struct dsa_switch *ds, int port,
294 struct ethtool_regs *regs, void *p);
295
296 /*
297 * Bridge integration
298 */
299 int (*port_bridge_join)(struct dsa_switch *ds, int port,
300 struct net_device *bridge);
301 void (*port_bridge_leave)(struct dsa_switch *ds, int port);
302 int (*port_stp_update)(struct dsa_switch *ds, int port,
303 u8 state);
304
305 /*
306 * VLAN support
307 */
308 int (*port_vlan_filtering)(struct dsa_switch *ds, int port,
309 bool vlan_filtering);
310 int (*port_vlan_prepare)(struct dsa_switch *ds, int port,
311 const struct switchdev_obj_port_vlan *vlan,
312 struct switchdev_trans *trans);
313 int (*port_vlan_add)(struct dsa_switch *ds, int port,
314 const struct switchdev_obj_port_vlan *vlan,
315 struct switchdev_trans *trans);
316 int (*port_vlan_del)(struct dsa_switch *ds, int port,
317 const struct switchdev_obj_port_vlan *vlan);
318 int (*port_vlan_dump)(struct dsa_switch *ds, int port,
319 struct switchdev_obj_port_vlan *vlan,
320 int (*cb)(struct switchdev_obj *obj));
321
322 /*
323 * Forwarding database
324 */
325 int (*port_fdb_prepare)(struct dsa_switch *ds, int port,
326 const struct switchdev_obj_port_fdb *fdb,
327 struct switchdev_trans *trans);
328 int (*port_fdb_add)(struct dsa_switch *ds, int port,
329 const struct switchdev_obj_port_fdb *fdb,
330 struct switchdev_trans *trans);
331 int (*port_fdb_del)(struct dsa_switch *ds, int port,
332 const struct switchdev_obj_port_fdb *fdb);
333 int (*port_fdb_dump)(struct dsa_switch *ds, int port,
334 struct switchdev_obj_port_fdb *fdb,
335 int (*cb)(struct switchdev_obj *obj));
336};
337
338void register_switch_driver(struct dsa_switch_driver *type);
339void unregister_switch_driver(struct dsa_switch_driver *type);
340struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev);
341
342static inline void *ds_to_priv(struct dsa_switch *ds)
343{
344 return (void *)(ds + 1);
345}
346
347static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst)
348{
349 return dst->rcv != NULL;
350}
351#endif