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Merge branch 'sirf/dt' into next/dt
[linux-2.6.git] / net / dsa / slave.c
blob29d684ebca6a83d3c29482f82c68d002b80baf79
1 /*
2 * net/dsa/slave.c - Slave device handling
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 #include <linux/list.h>
12 #include <linux/netdevice.h>
13 #include <linux/etherdevice.h>
14 #include <linux/phy.h>
15 #include "dsa_priv.h"
16
17 /* slave mii_bus handling ***************************************************/
18 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
19 {
20 struct dsa_switch *ds = bus->priv;
21
22 if (ds->phys_port_mask & (1 << addr))
23 return ds->drv->phy_read(ds, addr, reg);
24
25 return 0xffff;
26 }
27
28 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
29 {
30 struct dsa_switch *ds = bus->priv;
31
32 if (ds->phys_port_mask & (1 << addr))
33 return ds->drv->phy_write(ds, addr, reg, val);
34
35 return 0;
36 }
37
38 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
39 {
40 ds->slave_mii_bus->priv = (void *)ds;
41 ds->slave_mii_bus->name = "dsa slave smi";
42 ds->slave_mii_bus->read = dsa_slave_phy_read;
43 ds->slave_mii_bus->write = dsa_slave_phy_write;
44 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
45 ds->index, ds->pd->sw_addr);
46 ds->slave_mii_bus->parent = &ds->master_mii_bus->dev;
47 }
48
49
50 /* slave device handling ****************************************************/
51 static int dsa_slave_init(struct net_device *dev)
52 {
53 struct dsa_slave_priv *p = netdev_priv(dev);
54
55 dev->iflink = p->parent->dst->master_netdev->ifindex;
56
57 return 0;
58 }
59
60 static int dsa_slave_open(struct net_device *dev)
61 {
62 struct dsa_slave_priv *p = netdev_priv(dev);
63 struct net_device *master = p->parent->dst->master_netdev;
64 int err;
65
66 if (!(master->flags & IFF_UP))
67 return -ENETDOWN;
68
69 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
70 err = dev_uc_add(master, dev->dev_addr);
71 if (err < 0)
72 goto out;
73 }
74
75 if (dev->flags & IFF_ALLMULTI) {
76 err = dev_set_allmulti(master, 1);
77 if (err < 0)
78 goto del_unicast;
79 }
80 if (dev->flags & IFF_PROMISC) {
81 err = dev_set_promiscuity(master, 1);
82 if (err < 0)
83 goto clear_allmulti;
84 }
85
86 return 0;
87
88 clear_allmulti:
89 if (dev->flags & IFF_ALLMULTI)
90 dev_set_allmulti(master, -1);
91 del_unicast:
92 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
93 dev_uc_del(master, dev->dev_addr);
94 out:
95 return err;
96 }
97
98 static int dsa_slave_close(struct net_device *dev)
99 {
100 struct dsa_slave_priv *p = netdev_priv(dev);
101 struct net_device *master = p->parent->dst->master_netdev;
102
103 dev_mc_unsync(master, dev);
104 dev_uc_unsync(master, dev);
105 if (dev->flags & IFF_ALLMULTI)
106 dev_set_allmulti(master, -1);
107 if (dev->flags & IFF_PROMISC)
108 dev_set_promiscuity(master, -1);
109
110 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
111 dev_uc_del(master, dev->dev_addr);
112
113 return 0;
114 }
115
116 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
117 {
118 struct dsa_slave_priv *p = netdev_priv(dev);
119 struct net_device *master = p->parent->dst->master_netdev;
120
121 if (change & IFF_ALLMULTI)
122 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
123 if (change & IFF_PROMISC)
124 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
125 }
126
127 static void dsa_slave_set_rx_mode(struct net_device *dev)
128 {
129 struct dsa_slave_priv *p = netdev_priv(dev);
130 struct net_device *master = p->parent->dst->master_netdev;
131
132 dev_mc_sync(master, dev);
133 dev_uc_sync(master, dev);
134 }
135
136 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
137 {
138 struct dsa_slave_priv *p = netdev_priv(dev);
139 struct net_device *master = p->parent->dst->master_netdev;
140 struct sockaddr *addr = a;
141 int err;
142
143 if (!is_valid_ether_addr(addr->sa_data))
144 return -EADDRNOTAVAIL;
145
146 if (!(dev->flags & IFF_UP))
147 goto out;
148
149 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
150 err = dev_uc_add(master, addr->sa_data);
151 if (err < 0)
152 return err;
153 }
154
155 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
156 dev_uc_del(master, dev->dev_addr);
157
158 out:
159 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
160
161 return 0;
162 }
163
164 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
165 {
166 struct dsa_slave_priv *p = netdev_priv(dev);
167
168 if (p->phy != NULL)
169 return phy_mii_ioctl(p->phy, ifr, cmd);
170
171 return -EOPNOTSUPP;
172 }
173
174
175 /* ethtool operations *******************************************************/
176 static int
177 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
178 {
179 struct dsa_slave_priv *p = netdev_priv(dev);
180 int err;
181
182 err = -EOPNOTSUPP;
183 if (p->phy != NULL) {
184 err = phy_read_status(p->phy);
185 if (err == 0)
186 err = phy_ethtool_gset(p->phy, cmd);
187 }
188
189 return err;
190 }
191
192 static int
193 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
194 {
195 struct dsa_slave_priv *p = netdev_priv(dev);
196
197 if (p->phy != NULL)
198 return phy_ethtool_sset(p->phy, cmd);
199
200 return -EOPNOTSUPP;
201 }
202
203 static void dsa_slave_get_drvinfo(struct net_device *dev,
204 struct ethtool_drvinfo *drvinfo)
205 {
206 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
207 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
208 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
209 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
210 }
211
212 static int dsa_slave_nway_reset(struct net_device *dev)
213 {
214 struct dsa_slave_priv *p = netdev_priv(dev);
215
216 if (p->phy != NULL)
217 return genphy_restart_aneg(p->phy);
218
219 return -EOPNOTSUPP;
220 }
221
222 static u32 dsa_slave_get_link(struct net_device *dev)
223 {
224 struct dsa_slave_priv *p = netdev_priv(dev);
225
226 if (p->phy != NULL) {
227 genphy_update_link(p->phy);
228 return p->phy->link;
229 }
230
231 return -EOPNOTSUPP;
232 }
233
234 static void dsa_slave_get_strings(struct net_device *dev,
235 uint32_t stringset, uint8_t *data)
236 {
237 struct dsa_slave_priv *p = netdev_priv(dev);
238 struct dsa_switch *ds = p->parent;
239
240 if (stringset == ETH_SS_STATS) {
241 int len = ETH_GSTRING_LEN;
242
243 strncpy(data, "tx_packets", len);
244 strncpy(data + len, "tx_bytes", len);
245 strncpy(data + 2 * len, "rx_packets", len);
246 strncpy(data + 3 * len, "rx_bytes", len);
247 if (ds->drv->get_strings != NULL)
248 ds->drv->get_strings(ds, p->port, data + 4 * len);
249 }
250 }
251
252 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
253 struct ethtool_stats *stats,
254 uint64_t *data)
255 {
256 struct dsa_slave_priv *p = netdev_priv(dev);
257 struct dsa_switch *ds = p->parent;
258
259 data[0] = p->dev->stats.tx_packets;
260 data[1] = p->dev->stats.tx_bytes;
261 data[2] = p->dev->stats.rx_packets;
262 data[3] = p->dev->stats.rx_bytes;
263 if (ds->drv->get_ethtool_stats != NULL)
264 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
265 }
266
267 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
268 {
269 struct dsa_slave_priv *p = netdev_priv(dev);
270 struct dsa_switch *ds = p->parent;
271
272 if (sset == ETH_SS_STATS) {
273 int count;
274
275 count = 4;
276 if (ds->drv->get_sset_count != NULL)
277 count += ds->drv->get_sset_count(ds);
278
279 return count;
280 }
281
282 return -EOPNOTSUPP;
283 }
284
285 static const struct ethtool_ops dsa_slave_ethtool_ops = {
286 .get_settings = dsa_slave_get_settings,
287 .set_settings = dsa_slave_set_settings,
288 .get_drvinfo = dsa_slave_get_drvinfo,
289 .nway_reset = dsa_slave_nway_reset,
290 .get_link = dsa_slave_get_link,
291 .get_strings = dsa_slave_get_strings,
292 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
293 .get_sset_count = dsa_slave_get_sset_count,
294 };
295
296 #ifdef CONFIG_NET_DSA_TAG_DSA
297 static const struct net_device_ops dsa_netdev_ops = {
298 .ndo_init = dsa_slave_init,
299 .ndo_open = dsa_slave_open,
300 .ndo_stop = dsa_slave_close,
301 .ndo_start_xmit = dsa_xmit,
302 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
303 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
304 .ndo_set_mac_address = dsa_slave_set_mac_address,
305 .ndo_do_ioctl = dsa_slave_ioctl,
306 };
307 #endif
308 #ifdef CONFIG_NET_DSA_TAG_EDSA
309 static const struct net_device_ops edsa_netdev_ops = {
310 .ndo_init = dsa_slave_init,
311 .ndo_open = dsa_slave_open,
312 .ndo_stop = dsa_slave_close,
313 .ndo_start_xmit = edsa_xmit,
314 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
315 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
316 .ndo_set_mac_address = dsa_slave_set_mac_address,
317 .ndo_do_ioctl = dsa_slave_ioctl,
318 };
319 #endif
320 #ifdef CONFIG_NET_DSA_TAG_TRAILER
321 static const struct net_device_ops trailer_netdev_ops = {
322 .ndo_init = dsa_slave_init,
323 .ndo_open = dsa_slave_open,
324 .ndo_stop = dsa_slave_close,
325 .ndo_start_xmit = trailer_xmit,
326 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
327 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
328 .ndo_set_mac_address = dsa_slave_set_mac_address,
329 .ndo_do_ioctl = dsa_slave_ioctl,
330 };
331 #endif
332
333 /* slave device setup *******************************************************/
334 struct net_device *
335 dsa_slave_create(struct dsa_switch *ds, struct device *parent,
336 int port, char *name)
337 {
338 struct net_device *master = ds->dst->master_netdev;
339 struct net_device *slave_dev;
340 struct dsa_slave_priv *p;
341 int ret;
342
343 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv),
344 name, ether_setup);
345 if (slave_dev == NULL)
346 return slave_dev;
347
348 slave_dev->features = master->vlan_features;
349 SET_ETHTOOL_OPS(slave_dev, &dsa_slave_ethtool_ops);
350 eth_hw_addr_inherit(slave_dev, master);
351 slave_dev->tx_queue_len = 0;
352
353 switch (ds->dst->tag_protocol) {
354 #ifdef CONFIG_NET_DSA_TAG_DSA
355 case htons(ETH_P_DSA):
356 slave_dev->netdev_ops = &dsa_netdev_ops;
357 break;
358 #endif
359 #ifdef CONFIG_NET_DSA_TAG_EDSA
360 case htons(ETH_P_EDSA):
361 slave_dev->netdev_ops = &edsa_netdev_ops;
362 break;
363 #endif
364 #ifdef CONFIG_NET_DSA_TAG_TRAILER
365 case htons(ETH_P_TRAILER):
366 slave_dev->netdev_ops = &trailer_netdev_ops;
367 break;
368 #endif
369 default:
370 BUG();
371 }
372
373 SET_NETDEV_DEV(slave_dev, parent);
374 slave_dev->vlan_features = master->vlan_features;
375
376 p = netdev_priv(slave_dev);
377 p->dev = slave_dev;
378 p->parent = ds;
379 p->port = port;
380 p->phy = ds->slave_mii_bus->phy_map[port];
381
382 ret = register_netdev(slave_dev);
383 if (ret) {
384 printk(KERN_ERR "%s: error %d registering interface %s\n",
385 master->name, ret, slave_dev->name);
386 free_netdev(slave_dev);
387 return NULL;
388 }
389
390 netif_carrier_off(slave_dev);
391
392 if (p->phy != NULL) {
393 phy_attach(slave_dev, dev_name(&p->phy->dev),
394 PHY_INTERFACE_MODE_GMII);
395
396 p->phy->autoneg = AUTONEG_ENABLE;
397 p->phy->speed = 0;
398 p->phy->duplex = 0;
399 p->phy->advertising = p->phy->supported | ADVERTISED_Autoneg;
400 phy_start_aneg(p->phy);
401 }
402
403 return slave_dev;
404 }
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