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91da11f8 LB |
1 | /* |
2 | * net/dsa/slave.c - Slave device handling | |
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 | #include <linux/list.h> | |
12 | #include <linux/netdevice.h> | |
df02c6ff | 13 | #include <linux/etherdevice.h> |
91da11f8 | 14 | #include <linux/phy.h> |
0d8bcdd3 FF |
15 | #include <linux/of_net.h> |
16 | #include <linux/of_mdio.h> | |
91da11f8 LB |
17 | #include "dsa_priv.h" |
18 | ||
19 | /* slave mii_bus handling ***************************************************/ | |
20 | static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg) | |
21 | { | |
22 | struct dsa_switch *ds = bus->priv; | |
23 | ||
0d8bcdd3 | 24 | if (ds->phys_mii_mask & (1 << addr)) |
91da11f8 LB |
25 | return ds->drv->phy_read(ds, addr, reg); |
26 | ||
27 | return 0xffff; | |
28 | } | |
29 | ||
30 | static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val) | |
31 | { | |
32 | struct dsa_switch *ds = bus->priv; | |
33 | ||
0d8bcdd3 | 34 | if (ds->phys_mii_mask & (1 << addr)) |
91da11f8 LB |
35 | return ds->drv->phy_write(ds, addr, reg, val); |
36 | ||
37 | return 0; | |
38 | } | |
39 | ||
40 | void dsa_slave_mii_bus_init(struct dsa_switch *ds) | |
41 | { | |
42 | ds->slave_mii_bus->priv = (void *)ds; | |
43 | ds->slave_mii_bus->name = "dsa slave smi"; | |
44 | ds->slave_mii_bus->read = dsa_slave_phy_read; | |
45 | ds->slave_mii_bus->write = dsa_slave_phy_write; | |
f490be04 FF |
46 | snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x", |
47 | ds->index, ds->pd->sw_addr); | |
e84665c9 | 48 | ds->slave_mii_bus->parent = &ds->master_mii_bus->dev; |
91da11f8 LB |
49 | } |
50 | ||
51 | ||
52 | /* slave device handling ****************************************************/ | |
c0840801 LB |
53 | static int dsa_slave_init(struct net_device *dev) |
54 | { | |
55 | struct dsa_slave_priv *p = netdev_priv(dev); | |
c0840801 | 56 | |
e84665c9 | 57 | dev->iflink = p->parent->dst->master_netdev->ifindex; |
c0840801 LB |
58 | |
59 | return 0; | |
60 | } | |
61 | ||
91da11f8 LB |
62 | static int dsa_slave_open(struct net_device *dev) |
63 | { | |
df02c6ff | 64 | struct dsa_slave_priv *p = netdev_priv(dev); |
e84665c9 | 65 | struct net_device *master = p->parent->dst->master_netdev; |
df02c6ff LB |
66 | int err; |
67 | ||
68 | if (!(master->flags & IFF_UP)) | |
69 | return -ENETDOWN; | |
70 | ||
8feedbb4 | 71 | if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) { |
a748ee24 | 72 | err = dev_uc_add(master, dev->dev_addr); |
df02c6ff LB |
73 | if (err < 0) |
74 | goto out; | |
75 | } | |
76 | ||
77 | if (dev->flags & IFF_ALLMULTI) { | |
78 | err = dev_set_allmulti(master, 1); | |
79 | if (err < 0) | |
80 | goto del_unicast; | |
81 | } | |
82 | if (dev->flags & IFF_PROMISC) { | |
83 | err = dev_set_promiscuity(master, 1); | |
84 | if (err < 0) | |
85 | goto clear_allmulti; | |
86 | } | |
87 | ||
91da11f8 | 88 | return 0; |
df02c6ff LB |
89 | |
90 | clear_allmulti: | |
91 | if (dev->flags & IFF_ALLMULTI) | |
92 | dev_set_allmulti(master, -1); | |
93 | del_unicast: | |
8feedbb4 | 94 | if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) |
a748ee24 | 95 | dev_uc_del(master, dev->dev_addr); |
df02c6ff LB |
96 | out: |
97 | return err; | |
91da11f8 LB |
98 | } |
99 | ||
100 | static int dsa_slave_close(struct net_device *dev) | |
101 | { | |
df02c6ff | 102 | struct dsa_slave_priv *p = netdev_priv(dev); |
e84665c9 | 103 | struct net_device *master = p->parent->dst->master_netdev; |
df02c6ff LB |
104 | |
105 | dev_mc_unsync(master, dev); | |
a748ee24 | 106 | dev_uc_unsync(master, dev); |
df02c6ff LB |
107 | if (dev->flags & IFF_ALLMULTI) |
108 | dev_set_allmulti(master, -1); | |
109 | if (dev->flags & IFF_PROMISC) | |
110 | dev_set_promiscuity(master, -1); | |
111 | ||
8feedbb4 | 112 | if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) |
a748ee24 | 113 | dev_uc_del(master, dev->dev_addr); |
df02c6ff | 114 | |
91da11f8 LB |
115 | return 0; |
116 | } | |
117 | ||
118 | static void dsa_slave_change_rx_flags(struct net_device *dev, int change) | |
119 | { | |
120 | struct dsa_slave_priv *p = netdev_priv(dev); | |
e84665c9 | 121 | struct net_device *master = p->parent->dst->master_netdev; |
91da11f8 LB |
122 | |
123 | if (change & IFF_ALLMULTI) | |
124 | dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
125 | if (change & IFF_PROMISC) | |
126 | dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1); | |
127 | } | |
128 | ||
129 | static void dsa_slave_set_rx_mode(struct net_device *dev) | |
130 | { | |
131 | struct dsa_slave_priv *p = netdev_priv(dev); | |
e84665c9 | 132 | struct net_device *master = p->parent->dst->master_netdev; |
91da11f8 LB |
133 | |
134 | dev_mc_sync(master, dev); | |
a748ee24 | 135 | dev_uc_sync(master, dev); |
91da11f8 LB |
136 | } |
137 | ||
df02c6ff | 138 | static int dsa_slave_set_mac_address(struct net_device *dev, void *a) |
91da11f8 | 139 | { |
df02c6ff | 140 | struct dsa_slave_priv *p = netdev_priv(dev); |
e84665c9 | 141 | struct net_device *master = p->parent->dst->master_netdev; |
df02c6ff LB |
142 | struct sockaddr *addr = a; |
143 | int err; | |
144 | ||
145 | if (!is_valid_ether_addr(addr->sa_data)) | |
146 | return -EADDRNOTAVAIL; | |
147 | ||
148 | if (!(dev->flags & IFF_UP)) | |
149 | goto out; | |
150 | ||
8feedbb4 | 151 | if (!ether_addr_equal(addr->sa_data, master->dev_addr)) { |
a748ee24 | 152 | err = dev_uc_add(master, addr->sa_data); |
df02c6ff LB |
153 | if (err < 0) |
154 | return err; | |
155 | } | |
156 | ||
8feedbb4 | 157 | if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) |
a748ee24 | 158 | dev_uc_del(master, dev->dev_addr); |
df02c6ff LB |
159 | |
160 | out: | |
d08f161a | 161 | ether_addr_copy(dev->dev_addr, addr->sa_data); |
91da11f8 LB |
162 | |
163 | return 0; | |
164 | } | |
165 | ||
166 | static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
167 | { | |
168 | struct dsa_slave_priv *p = netdev_priv(dev); | |
91da11f8 LB |
169 | |
170 | if (p->phy != NULL) | |
28b04113 | 171 | return phy_mii_ioctl(p->phy, ifr, cmd); |
91da11f8 LB |
172 | |
173 | return -EOPNOTSUPP; | |
174 | } | |
175 | ||
3e8a72d1 FF |
176 | static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev) |
177 | { | |
178 | struct dsa_slave_priv *p = netdev_priv(dev); | |
179 | struct dsa_switch_tree *dst = p->parent->dst; | |
180 | ||
181 | return dst->ops->xmit(skb, dev); | |
182 | } | |
183 | ||
5aed85ce FF |
184 | static netdev_tx_t dsa_slave_notag_xmit(struct sk_buff *skb, |
185 | struct net_device *dev) | |
186 | { | |
187 | struct dsa_slave_priv *p = netdev_priv(dev); | |
188 | ||
189 | skb->dev = p->parent->dst->master_netdev; | |
190 | dev_queue_xmit(skb); | |
191 | ||
192 | return NETDEV_TX_OK; | |
193 | } | |
194 | ||
91da11f8 LB |
195 | |
196 | /* ethtool operations *******************************************************/ | |
197 | static int | |
198 | dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
199 | { | |
200 | struct dsa_slave_priv *p = netdev_priv(dev); | |
201 | int err; | |
202 | ||
203 | err = -EOPNOTSUPP; | |
204 | if (p->phy != NULL) { | |
205 | err = phy_read_status(p->phy); | |
206 | if (err == 0) | |
207 | err = phy_ethtool_gset(p->phy, cmd); | |
208 | } | |
209 | ||
210 | return err; | |
211 | } | |
212 | ||
213 | static int | |
214 | dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
215 | { | |
216 | struct dsa_slave_priv *p = netdev_priv(dev); | |
217 | ||
218 | if (p->phy != NULL) | |
219 | return phy_ethtool_sset(p->phy, cmd); | |
220 | ||
221 | return -EOPNOTSUPP; | |
222 | } | |
223 | ||
224 | static void dsa_slave_get_drvinfo(struct net_device *dev, | |
225 | struct ethtool_drvinfo *drvinfo) | |
226 | { | |
7826d43f JP |
227 | strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver)); |
228 | strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version)); | |
229 | strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version)); | |
230 | strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info)); | |
91da11f8 LB |
231 | } |
232 | ||
233 | static int dsa_slave_nway_reset(struct net_device *dev) | |
234 | { | |
235 | struct dsa_slave_priv *p = netdev_priv(dev); | |
236 | ||
237 | if (p->phy != NULL) | |
238 | return genphy_restart_aneg(p->phy); | |
239 | ||
240 | return -EOPNOTSUPP; | |
241 | } | |
242 | ||
243 | static u32 dsa_slave_get_link(struct net_device *dev) | |
244 | { | |
245 | struct dsa_slave_priv *p = netdev_priv(dev); | |
246 | ||
247 | if (p->phy != NULL) { | |
248 | genphy_update_link(p->phy); | |
249 | return p->phy->link; | |
250 | } | |
251 | ||
252 | return -EOPNOTSUPP; | |
253 | } | |
254 | ||
255 | static void dsa_slave_get_strings(struct net_device *dev, | |
256 | uint32_t stringset, uint8_t *data) | |
257 | { | |
258 | struct dsa_slave_priv *p = netdev_priv(dev); | |
259 | struct dsa_switch *ds = p->parent; | |
260 | ||
261 | if (stringset == ETH_SS_STATS) { | |
262 | int len = ETH_GSTRING_LEN; | |
263 | ||
264 | strncpy(data, "tx_packets", len); | |
265 | strncpy(data + len, "tx_bytes", len); | |
266 | strncpy(data + 2 * len, "rx_packets", len); | |
267 | strncpy(data + 3 * len, "rx_bytes", len); | |
268 | if (ds->drv->get_strings != NULL) | |
269 | ds->drv->get_strings(ds, p->port, data + 4 * len); | |
270 | } | |
271 | } | |
272 | ||
273 | static void dsa_slave_get_ethtool_stats(struct net_device *dev, | |
274 | struct ethtool_stats *stats, | |
275 | uint64_t *data) | |
276 | { | |
277 | struct dsa_slave_priv *p = netdev_priv(dev); | |
278 | struct dsa_switch *ds = p->parent; | |
279 | ||
280 | data[0] = p->dev->stats.tx_packets; | |
281 | data[1] = p->dev->stats.tx_bytes; | |
282 | data[2] = p->dev->stats.rx_packets; | |
283 | data[3] = p->dev->stats.rx_bytes; | |
284 | if (ds->drv->get_ethtool_stats != NULL) | |
285 | ds->drv->get_ethtool_stats(ds, p->port, data + 4); | |
286 | } | |
287 | ||
288 | static int dsa_slave_get_sset_count(struct net_device *dev, int sset) | |
289 | { | |
290 | struct dsa_slave_priv *p = netdev_priv(dev); | |
291 | struct dsa_switch *ds = p->parent; | |
292 | ||
293 | if (sset == ETH_SS_STATS) { | |
294 | int count; | |
295 | ||
296 | count = 4; | |
297 | if (ds->drv->get_sset_count != NULL) | |
298 | count += ds->drv->get_sset_count(ds); | |
299 | ||
300 | return count; | |
301 | } | |
302 | ||
303 | return -EOPNOTSUPP; | |
304 | } | |
305 | ||
306 | static const struct ethtool_ops dsa_slave_ethtool_ops = { | |
307 | .get_settings = dsa_slave_get_settings, | |
308 | .set_settings = dsa_slave_set_settings, | |
309 | .get_drvinfo = dsa_slave_get_drvinfo, | |
310 | .nway_reset = dsa_slave_nway_reset, | |
311 | .get_link = dsa_slave_get_link, | |
91da11f8 LB |
312 | .get_strings = dsa_slave_get_strings, |
313 | .get_ethtool_stats = dsa_slave_get_ethtool_stats, | |
314 | .get_sset_count = dsa_slave_get_sset_count, | |
315 | }; | |
316 | ||
3e8a72d1 | 317 | static const struct net_device_ops dsa_slave_netdev_ops = { |
c0840801 | 318 | .ndo_init = dsa_slave_init, |
d442ad4a SH |
319 | .ndo_open = dsa_slave_open, |
320 | .ndo_stop = dsa_slave_close, | |
3e8a72d1 | 321 | .ndo_start_xmit = dsa_slave_xmit, |
d442ad4a SH |
322 | .ndo_change_rx_flags = dsa_slave_change_rx_flags, |
323 | .ndo_set_rx_mode = dsa_slave_set_rx_mode, | |
d442ad4a SH |
324 | .ndo_set_mac_address = dsa_slave_set_mac_address, |
325 | .ndo_do_ioctl = dsa_slave_ioctl, | |
326 | }; | |
91da11f8 | 327 | |
5aed85ce FF |
328 | static const struct dsa_device_ops notag_netdev_ops = { |
329 | .xmit = dsa_slave_notag_xmit, | |
330 | .rcv = NULL, | |
331 | }; | |
332 | ||
0d8bcdd3 FF |
333 | static void dsa_slave_adjust_link(struct net_device *dev) |
334 | { | |
335 | struct dsa_slave_priv *p = netdev_priv(dev); | |
ec9436ba | 336 | struct dsa_switch *ds = p->parent; |
0d8bcdd3 FF |
337 | unsigned int status_changed = 0; |
338 | ||
339 | if (p->old_link != p->phy->link) { | |
340 | status_changed = 1; | |
341 | p->old_link = p->phy->link; | |
342 | } | |
343 | ||
344 | if (p->old_duplex != p->phy->duplex) { | |
345 | status_changed = 1; | |
346 | p->old_duplex = p->phy->duplex; | |
347 | } | |
348 | ||
349 | if (p->old_pause != p->phy->pause) { | |
350 | status_changed = 1; | |
351 | p->old_pause = p->phy->pause; | |
352 | } | |
353 | ||
ec9436ba FF |
354 | if (ds->drv->adjust_link && status_changed) |
355 | ds->drv->adjust_link(ds, p->port, p->phy); | |
356 | ||
0d8bcdd3 FF |
357 | if (status_changed) |
358 | phy_print_status(p->phy); | |
359 | } | |
360 | ||
91da11f8 | 361 | /* slave device setup *******************************************************/ |
0d8bcdd3 FF |
362 | static void dsa_slave_phy_setup(struct dsa_slave_priv *p, |
363 | struct net_device *slave_dev) | |
364 | { | |
365 | struct dsa_switch *ds = p->parent; | |
366 | struct dsa_chip_data *cd = ds->pd; | |
367 | struct device_node *phy_dn, *port_dn; | |
368 | int ret; | |
369 | ||
370 | port_dn = cd->port_dn[p->port]; | |
371 | p->phy_interface = of_get_phy_mode(port_dn); | |
372 | ||
373 | phy_dn = of_parse_phandle(port_dn, "phy-handle", 0); | |
374 | if (of_phy_is_fixed_link(port_dn)) { | |
375 | /* In the case of a fixed PHY, the DT node associated | |
376 | * to the fixed PHY is the Port DT node | |
377 | */ | |
378 | ret = of_phy_register_fixed_link(port_dn); | |
379 | if (ret) { | |
380 | pr_err("failed to register fixed PHY\n"); | |
381 | return; | |
382 | } | |
383 | phy_dn = port_dn; | |
384 | } | |
385 | ||
386 | if (phy_dn) | |
387 | p->phy = of_phy_connect(slave_dev, phy_dn, | |
388 | dsa_slave_adjust_link, 0, | |
389 | p->phy_interface); | |
390 | ||
391 | /* We could not connect to a designated PHY, so use the switch internal | |
392 | * MDIO bus instead | |
393 | */ | |
394 | if (!p->phy) | |
395 | p->phy = ds->slave_mii_bus->phy_map[p->port]; | |
396 | else | |
397 | pr_info("attached PHY at address %d [%s]\n", | |
398 | p->phy->addr, p->phy->drv->name); | |
399 | } | |
400 | ||
91da11f8 LB |
401 | struct net_device * |
402 | dsa_slave_create(struct dsa_switch *ds, struct device *parent, | |
403 | int port, char *name) | |
404 | { | |
e84665c9 | 405 | struct net_device *master = ds->dst->master_netdev; |
91da11f8 LB |
406 | struct net_device *slave_dev; |
407 | struct dsa_slave_priv *p; | |
408 | int ret; | |
409 | ||
c835a677 TG |
410 | slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name, |
411 | NET_NAME_UNKNOWN, ether_setup); | |
91da11f8 LB |
412 | if (slave_dev == NULL) |
413 | return slave_dev; | |
414 | ||
415 | slave_dev->features = master->vlan_features; | |
7ad24ea4 | 416 | slave_dev->ethtool_ops = &dsa_slave_ethtool_ops; |
2fcc8005 | 417 | eth_hw_addr_inherit(slave_dev, master); |
91da11f8 | 418 | slave_dev->tx_queue_len = 0; |
3e8a72d1 | 419 | slave_dev->netdev_ops = &dsa_slave_netdev_ops; |
d442ad4a | 420 | |
e84665c9 | 421 | switch (ds->dst->tag_protocol) { |
cf85d08f LB |
422 | #ifdef CONFIG_NET_DSA_TAG_DSA |
423 | case htons(ETH_P_DSA): | |
3e8a72d1 | 424 | ds->dst->ops = &dsa_netdev_ops; |
cf85d08f LB |
425 | break; |
426 | #endif | |
91da11f8 LB |
427 | #ifdef CONFIG_NET_DSA_TAG_EDSA |
428 | case htons(ETH_P_EDSA): | |
3e8a72d1 | 429 | ds->dst->ops = &edsa_netdev_ops; |
91da11f8 | 430 | break; |
396138f0 LB |
431 | #endif |
432 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
433 | case htons(ETH_P_TRAILER): | |
3e8a72d1 | 434 | ds->dst->ops = &trailer_netdev_ops; |
396138f0 | 435 | break; |
91da11f8 LB |
436 | #endif |
437 | default: | |
5aed85ce FF |
438 | ds->dst->ops = ¬ag_netdev_ops; |
439 | break; | |
91da11f8 | 440 | } |
d442ad4a | 441 | |
91da11f8 | 442 | SET_NETDEV_DEV(slave_dev, parent); |
bd47497a | 443 | slave_dev->dev.of_node = ds->pd->port_dn[port]; |
91da11f8 LB |
444 | slave_dev->vlan_features = master->vlan_features; |
445 | ||
446 | p = netdev_priv(slave_dev); | |
447 | p->dev = slave_dev; | |
448 | p->parent = ds; | |
449 | p->port = port; | |
0d8bcdd3 FF |
450 | |
451 | p->old_pause = -1; | |
452 | p->old_link = -1; | |
453 | p->old_duplex = -1; | |
454 | ||
455 | dsa_slave_phy_setup(p, slave_dev); | |
91da11f8 LB |
456 | |
457 | ret = register_netdev(slave_dev); | |
458 | if (ret) { | |
459 | printk(KERN_ERR "%s: error %d registering interface %s\n", | |
460 | master->name, ret, slave_dev->name); | |
461 | free_netdev(slave_dev); | |
462 | return NULL; | |
463 | } | |
464 | ||
465 | netif_carrier_off(slave_dev); | |
466 | ||
467 | if (p->phy != NULL) { | |
fb28ad35 | 468 | phy_attach(slave_dev, dev_name(&p->phy->dev), |
f9a8f83b | 469 | PHY_INTERFACE_MODE_GMII); |
91da11f8 LB |
470 | |
471 | p->phy->autoneg = AUTONEG_ENABLE; | |
472 | p->phy->speed = 0; | |
473 | p->phy->duplex = 0; | |
474 | p->phy->advertising = p->phy->supported | ADVERTISED_Autoneg; | |
475 | phy_start_aneg(p->phy); | |
476 | } | |
477 | ||
478 | return slave_dev; | |
479 | } |