2 * net/dsa/slave.c - Slave device handling
3 * Copyright (c) 2008-2009 Marvell Semiconductor
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.
11 #include <linux/list.h>
12 #include <linux/etherdevice.h>
13 #include <linux/phy.h>
14 #include <linux/of_net.h>
15 #include <linux/of_mdio.h>
18 /* slave mii_bus handling ***************************************************/
19 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
21 struct dsa_switch *ds = bus->priv;
23 if (ds->phys_mii_mask & (1 << addr))
24 return ds->drv->phy_read(ds, addr, reg);
29 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
31 struct dsa_switch *ds = bus->priv;
33 if (ds->phys_mii_mask & (1 << addr))
34 return ds->drv->phy_write(ds, addr, reg, val);
39 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
41 ds->slave_mii_bus->priv = (void *)ds;
42 ds->slave_mii_bus->name = "dsa slave smi";
43 ds->slave_mii_bus->read = dsa_slave_phy_read;
44 ds->slave_mii_bus->write = dsa_slave_phy_write;
45 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
46 ds->index, ds->pd->sw_addr);
47 ds->slave_mii_bus->parent = ds->master_dev;
51 /* slave device handling ****************************************************/
52 static int dsa_slave_init(struct net_device *dev)
54 struct dsa_slave_priv *p = netdev_priv(dev);
56 dev->iflink = p->parent->dst->master_netdev->ifindex;
61 static int dsa_slave_open(struct net_device *dev)
63 struct dsa_slave_priv *p = netdev_priv(dev);
64 struct net_device *master = p->parent->dst->master_netdev;
65 struct dsa_switch *ds = p->parent;
68 if (!(master->flags & IFF_UP))
71 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
72 err = dev_uc_add(master, dev->dev_addr);
77 if (dev->flags & IFF_ALLMULTI) {
78 err = dev_set_allmulti(master, 1);
82 if (dev->flags & IFF_PROMISC) {
83 err = dev_set_promiscuity(master, 1);
88 if (ds->drv->port_enable) {
89 err = ds->drv->port_enable(ds, p->port, p->phy);
100 if (dev->flags & IFF_PROMISC)
101 dev_set_promiscuity(master, 0);
103 if (dev->flags & IFF_ALLMULTI)
104 dev_set_allmulti(master, -1);
106 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
107 dev_uc_del(master, dev->dev_addr);
112 static int dsa_slave_close(struct net_device *dev)
114 struct dsa_slave_priv *p = netdev_priv(dev);
115 struct net_device *master = p->parent->dst->master_netdev;
116 struct dsa_switch *ds = p->parent;
121 dev_mc_unsync(master, dev);
122 dev_uc_unsync(master, dev);
123 if (dev->flags & IFF_ALLMULTI)
124 dev_set_allmulti(master, -1);
125 if (dev->flags & IFF_PROMISC)
126 dev_set_promiscuity(master, -1);
128 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
129 dev_uc_del(master, dev->dev_addr);
131 if (ds->drv->port_disable)
132 ds->drv->port_disable(ds, p->port, p->phy);
137 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
139 struct dsa_slave_priv *p = netdev_priv(dev);
140 struct net_device *master = p->parent->dst->master_netdev;
142 if (change & IFF_ALLMULTI)
143 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
144 if (change & IFF_PROMISC)
145 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
148 static void dsa_slave_set_rx_mode(struct net_device *dev)
150 struct dsa_slave_priv *p = netdev_priv(dev);
151 struct net_device *master = p->parent->dst->master_netdev;
153 dev_mc_sync(master, dev);
154 dev_uc_sync(master, dev);
157 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
159 struct dsa_slave_priv *p = netdev_priv(dev);
160 struct net_device *master = p->parent->dst->master_netdev;
161 struct sockaddr *addr = a;
164 if (!is_valid_ether_addr(addr->sa_data))
165 return -EADDRNOTAVAIL;
167 if (!(dev->flags & IFF_UP))
170 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
171 err = dev_uc_add(master, addr->sa_data);
176 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
177 dev_uc_del(master, dev->dev_addr);
180 ether_addr_copy(dev->dev_addr, addr->sa_data);
185 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
187 struct dsa_slave_priv *p = netdev_priv(dev);
190 return phy_mii_ioctl(p->phy, ifr, cmd);
195 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
197 struct dsa_slave_priv *p = netdev_priv(dev);
199 return p->xmit(skb, dev);
202 static netdev_tx_t dsa_slave_notag_xmit(struct sk_buff *skb,
203 struct net_device *dev)
205 struct dsa_slave_priv *p = netdev_priv(dev);
207 skb->dev = p->parent->dst->master_netdev;
214 /* ethtool operations *******************************************************/
216 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
218 struct dsa_slave_priv *p = netdev_priv(dev);
222 if (p->phy != NULL) {
223 err = phy_read_status(p->phy);
225 err = phy_ethtool_gset(p->phy, cmd);
232 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
234 struct dsa_slave_priv *p = netdev_priv(dev);
237 return phy_ethtool_sset(p->phy, cmd);
242 static void dsa_slave_get_drvinfo(struct net_device *dev,
243 struct ethtool_drvinfo *drvinfo)
245 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
246 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
247 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
248 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
251 static int dsa_slave_nway_reset(struct net_device *dev)
253 struct dsa_slave_priv *p = netdev_priv(dev);
256 return genphy_restart_aneg(p->phy);
261 static u32 dsa_slave_get_link(struct net_device *dev)
263 struct dsa_slave_priv *p = netdev_priv(dev);
265 if (p->phy != NULL) {
266 genphy_update_link(p->phy);
273 static void dsa_slave_get_strings(struct net_device *dev,
274 uint32_t stringset, uint8_t *data)
276 struct dsa_slave_priv *p = netdev_priv(dev);
277 struct dsa_switch *ds = p->parent;
279 if (stringset == ETH_SS_STATS) {
280 int len = ETH_GSTRING_LEN;
282 strncpy(data, "tx_packets", len);
283 strncpy(data + len, "tx_bytes", len);
284 strncpy(data + 2 * len, "rx_packets", len);
285 strncpy(data + 3 * len, "rx_bytes", len);
286 if (ds->drv->get_strings != NULL)
287 ds->drv->get_strings(ds, p->port, data + 4 * len);
291 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
292 struct ethtool_stats *stats,
295 struct dsa_slave_priv *p = netdev_priv(dev);
296 struct dsa_switch *ds = p->parent;
298 data[0] = p->dev->stats.tx_packets;
299 data[1] = p->dev->stats.tx_bytes;
300 data[2] = p->dev->stats.rx_packets;
301 data[3] = p->dev->stats.rx_bytes;
302 if (ds->drv->get_ethtool_stats != NULL)
303 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
306 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
308 struct dsa_slave_priv *p = netdev_priv(dev);
309 struct dsa_switch *ds = p->parent;
311 if (sset == ETH_SS_STATS) {
315 if (ds->drv->get_sset_count != NULL)
316 count += ds->drv->get_sset_count(ds);
324 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
326 struct dsa_slave_priv *p = netdev_priv(dev);
327 struct dsa_switch *ds = p->parent;
329 if (ds->drv->get_wol)
330 ds->drv->get_wol(ds, p->port, w);
333 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
335 struct dsa_slave_priv *p = netdev_priv(dev);
336 struct dsa_switch *ds = p->parent;
337 int ret = -EOPNOTSUPP;
339 if (ds->drv->set_wol)
340 ret = ds->drv->set_wol(ds, p->port, w);
345 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
347 struct dsa_slave_priv *p = netdev_priv(dev);
348 struct dsa_switch *ds = p->parent;
351 if (!ds->drv->set_eee)
354 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
359 ret = phy_ethtool_set_eee(p->phy, e);
364 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
366 struct dsa_slave_priv *p = netdev_priv(dev);
367 struct dsa_switch *ds = p->parent;
370 if (!ds->drv->get_eee)
373 ret = ds->drv->get_eee(ds, p->port, e);
378 ret = phy_ethtool_get_eee(p->phy, e);
383 static const struct ethtool_ops dsa_slave_ethtool_ops = {
384 .get_settings = dsa_slave_get_settings,
385 .set_settings = dsa_slave_set_settings,
386 .get_drvinfo = dsa_slave_get_drvinfo,
387 .nway_reset = dsa_slave_nway_reset,
388 .get_link = dsa_slave_get_link,
389 .get_strings = dsa_slave_get_strings,
390 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
391 .get_sset_count = dsa_slave_get_sset_count,
392 .set_wol = dsa_slave_set_wol,
393 .get_wol = dsa_slave_get_wol,
394 .set_eee = dsa_slave_set_eee,
395 .get_eee = dsa_slave_get_eee,
398 static const struct net_device_ops dsa_slave_netdev_ops = {
399 .ndo_init = dsa_slave_init,
400 .ndo_open = dsa_slave_open,
401 .ndo_stop = dsa_slave_close,
402 .ndo_start_xmit = dsa_slave_xmit,
403 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
404 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
405 .ndo_set_mac_address = dsa_slave_set_mac_address,
406 .ndo_do_ioctl = dsa_slave_ioctl,
409 static void dsa_slave_adjust_link(struct net_device *dev)
411 struct dsa_slave_priv *p = netdev_priv(dev);
412 struct dsa_switch *ds = p->parent;
413 unsigned int status_changed = 0;
415 if (p->old_link != p->phy->link) {
417 p->old_link = p->phy->link;
420 if (p->old_duplex != p->phy->duplex) {
422 p->old_duplex = p->phy->duplex;
425 if (p->old_pause != p->phy->pause) {
427 p->old_pause = p->phy->pause;
430 if (ds->drv->adjust_link && status_changed)
431 ds->drv->adjust_link(ds, p->port, p->phy);
434 phy_print_status(p->phy);
437 static int dsa_slave_fixed_link_update(struct net_device *dev,
438 struct fixed_phy_status *status)
440 struct dsa_slave_priv *p = netdev_priv(dev);
441 struct dsa_switch *ds = p->parent;
443 if (ds->drv->fixed_link_update)
444 ds->drv->fixed_link_update(ds, p->port, status);
449 /* slave device setup *******************************************************/
450 static void dsa_slave_phy_setup(struct dsa_slave_priv *p,
451 struct net_device *slave_dev)
453 struct dsa_switch *ds = p->parent;
454 struct dsa_chip_data *cd = ds->pd;
455 struct device_node *phy_dn, *port_dn;
456 bool phy_is_fixed = false;
460 port_dn = cd->port_dn[p->port];
461 p->phy_interface = of_get_phy_mode(port_dn);
463 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
464 if (of_phy_is_fixed_link(port_dn)) {
465 /* In the case of a fixed PHY, the DT node associated
466 * to the fixed PHY is the Port DT node
468 ret = of_phy_register_fixed_link(port_dn);
470 pr_err("failed to register fixed PHY\n");
477 if (ds->drv->get_phy_flags)
478 phy_flags = ds->drv->get_phy_flags(ds, p->port);
481 p->phy = of_phy_connect(slave_dev, phy_dn,
482 dsa_slave_adjust_link, phy_flags,
485 if (p->phy && phy_is_fixed)
486 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
488 /* We could not connect to a designated PHY, so use the switch internal
492 p->phy = ds->slave_mii_bus->phy_map[p->port];
494 pr_info("attached PHY at address %d [%s]\n",
495 p->phy->addr, p->phy->drv->name);
498 int dsa_slave_suspend(struct net_device *slave_dev)
500 struct dsa_slave_priv *p = netdev_priv(slave_dev);
502 netif_device_detach(slave_dev);
515 int dsa_slave_resume(struct net_device *slave_dev)
517 struct dsa_slave_priv *p = netdev_priv(slave_dev);
519 netif_device_attach(slave_dev);
530 dsa_slave_create(struct dsa_switch *ds, struct device *parent,
531 int port, char *name)
533 struct net_device *master = ds->dst->master_netdev;
534 struct net_device *slave_dev;
535 struct dsa_slave_priv *p;
538 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
539 NET_NAME_UNKNOWN, ether_setup);
540 if (slave_dev == NULL)
543 slave_dev->features = master->vlan_features;
544 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
545 eth_hw_addr_inherit(slave_dev, master);
546 slave_dev->tx_queue_len = 0;
547 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
549 SET_NETDEV_DEV(slave_dev, parent);
550 slave_dev->dev.of_node = ds->pd->port_dn[port];
551 slave_dev->vlan_features = master->vlan_features;
553 p = netdev_priv(slave_dev);
558 switch (ds->dst->tag_protocol) {
559 #ifdef CONFIG_NET_DSA_TAG_DSA
560 case DSA_TAG_PROTO_DSA:
561 p->xmit = dsa_netdev_ops.xmit;
564 #ifdef CONFIG_NET_DSA_TAG_EDSA
565 case DSA_TAG_PROTO_EDSA:
566 p->xmit = edsa_netdev_ops.xmit;
569 #ifdef CONFIG_NET_DSA_TAG_TRAILER
570 case DSA_TAG_PROTO_TRAILER:
571 p->xmit = trailer_netdev_ops.xmit;
574 #ifdef CONFIG_NET_DSA_TAG_BRCM
575 case DSA_TAG_PROTO_BRCM:
576 p->xmit = brcm_netdev_ops.xmit;
580 p->xmit = dsa_slave_notag_xmit;
588 dsa_slave_phy_setup(p, slave_dev);
590 ret = register_netdev(slave_dev);
592 printk(KERN_ERR "%s: error %d registering interface %s\n",
593 master->name, ret, slave_dev->name);
594 free_netdev(slave_dev);
598 netif_carrier_off(slave_dev);
600 if (p->phy != NULL) {
601 if (ds->drv->get_phy_flags(ds, port))
602 p->phy->dev_flags |= ds->drv->get_phy_flags(ds, port);
604 phy_attach(slave_dev, dev_name(&p->phy->dev),
605 PHY_INTERFACE_MODE_GMII);
607 p->phy->autoneg = AUTONEG_ENABLE;
610 p->phy->advertising = p->phy->supported | ADVERTISED_Autoneg;