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/phy_fixed.h>
15 #include <linux/of_net.h>
16 #include <linux/of_mdio.h>
19 /* slave mii_bus handling ***************************************************/
20 static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
22 struct dsa_switch *ds = bus->priv;
24 if (ds->phys_mii_mask & (1 << addr))
25 return ds->drv->phy_read(ds, addr, reg);
30 static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
32 struct dsa_switch *ds = bus->priv;
34 if (ds->phys_mii_mask & (1 << addr))
35 return ds->drv->phy_write(ds, addr, reg, val);
40 void dsa_slave_mii_bus_init(struct dsa_switch *ds)
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;
46 snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d:%.2x",
47 ds->index, ds->pd->sw_addr);
48 ds->slave_mii_bus->parent = ds->master_dev;
52 /* slave device handling ****************************************************/
53 static int dsa_slave_init(struct net_device *dev)
55 struct dsa_slave_priv *p = netdev_priv(dev);
57 dev->iflink = p->parent->dst->master_netdev->ifindex;
62 static int dsa_slave_open(struct net_device *dev)
64 struct dsa_slave_priv *p = netdev_priv(dev);
65 struct net_device *master = p->parent->dst->master_netdev;
66 struct dsa_switch *ds = p->parent;
69 if (!(master->flags & IFF_UP))
72 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
73 err = dev_uc_add(master, dev->dev_addr);
78 if (dev->flags & IFF_ALLMULTI) {
79 err = dev_set_allmulti(master, 1);
83 if (dev->flags & IFF_PROMISC) {
84 err = dev_set_promiscuity(master, 1);
89 if (ds->drv->port_enable) {
90 err = ds->drv->port_enable(ds, p->port, p->phy);
101 if (dev->flags & IFF_PROMISC)
102 dev_set_promiscuity(master, 0);
104 if (dev->flags & IFF_ALLMULTI)
105 dev_set_allmulti(master, -1);
107 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
108 dev_uc_del(master, dev->dev_addr);
113 static int dsa_slave_close(struct net_device *dev)
115 struct dsa_slave_priv *p = netdev_priv(dev);
116 struct net_device *master = p->parent->dst->master_netdev;
117 struct dsa_switch *ds = p->parent;
122 dev_mc_unsync(master, dev);
123 dev_uc_unsync(master, dev);
124 if (dev->flags & IFF_ALLMULTI)
125 dev_set_allmulti(master, -1);
126 if (dev->flags & IFF_PROMISC)
127 dev_set_promiscuity(master, -1);
129 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
130 dev_uc_del(master, dev->dev_addr);
132 if (ds->drv->port_disable)
133 ds->drv->port_disable(ds, p->port, p->phy);
138 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
140 struct dsa_slave_priv *p = netdev_priv(dev);
141 struct net_device *master = p->parent->dst->master_netdev;
143 if (change & IFF_ALLMULTI)
144 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
145 if (change & IFF_PROMISC)
146 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
149 static void dsa_slave_set_rx_mode(struct net_device *dev)
151 struct dsa_slave_priv *p = netdev_priv(dev);
152 struct net_device *master = p->parent->dst->master_netdev;
154 dev_mc_sync(master, dev);
155 dev_uc_sync(master, dev);
158 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
160 struct dsa_slave_priv *p = netdev_priv(dev);
161 struct net_device *master = p->parent->dst->master_netdev;
162 struct sockaddr *addr = a;
165 if (!is_valid_ether_addr(addr->sa_data))
166 return -EADDRNOTAVAIL;
168 if (!(dev->flags & IFF_UP))
171 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
172 err = dev_uc_add(master, addr->sa_data);
177 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
178 dev_uc_del(master, dev->dev_addr);
181 ether_addr_copy(dev->dev_addr, addr->sa_data);
186 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
188 struct dsa_slave_priv *p = netdev_priv(dev);
191 return phy_mii_ioctl(p->phy, ifr, cmd);
196 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
198 struct dsa_slave_priv *p = netdev_priv(dev);
200 return p->xmit(skb, dev);
203 static netdev_tx_t dsa_slave_notag_xmit(struct sk_buff *skb,
204 struct net_device *dev)
206 struct dsa_slave_priv *p = netdev_priv(dev);
208 skb->dev = p->parent->dst->master_netdev;
215 /* ethtool operations *******************************************************/
217 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
219 struct dsa_slave_priv *p = netdev_priv(dev);
223 if (p->phy != NULL) {
224 err = phy_read_status(p->phy);
226 err = phy_ethtool_gset(p->phy, cmd);
233 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
235 struct dsa_slave_priv *p = netdev_priv(dev);
238 return phy_ethtool_sset(p->phy, cmd);
243 static void dsa_slave_get_drvinfo(struct net_device *dev,
244 struct ethtool_drvinfo *drvinfo)
246 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
247 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
248 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
249 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
252 static int dsa_slave_nway_reset(struct net_device *dev)
254 struct dsa_slave_priv *p = netdev_priv(dev);
257 return genphy_restart_aneg(p->phy);
262 static u32 dsa_slave_get_link(struct net_device *dev)
264 struct dsa_slave_priv *p = netdev_priv(dev);
266 if (p->phy != NULL) {
267 genphy_update_link(p->phy);
274 static void dsa_slave_get_strings(struct net_device *dev,
275 uint32_t stringset, uint8_t *data)
277 struct dsa_slave_priv *p = netdev_priv(dev);
278 struct dsa_switch *ds = p->parent;
280 if (stringset == ETH_SS_STATS) {
281 int len = ETH_GSTRING_LEN;
283 strncpy(data, "tx_packets", len);
284 strncpy(data + len, "tx_bytes", len);
285 strncpy(data + 2 * len, "rx_packets", len);
286 strncpy(data + 3 * len, "rx_bytes", len);
287 if (ds->drv->get_strings != NULL)
288 ds->drv->get_strings(ds, p->port, data + 4 * len);
292 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
293 struct ethtool_stats *stats,
296 struct dsa_slave_priv *p = netdev_priv(dev);
297 struct dsa_switch *ds = p->parent;
299 data[0] = p->dev->stats.tx_packets;
300 data[1] = p->dev->stats.tx_bytes;
301 data[2] = p->dev->stats.rx_packets;
302 data[3] = p->dev->stats.rx_bytes;
303 if (ds->drv->get_ethtool_stats != NULL)
304 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
307 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
309 struct dsa_slave_priv *p = netdev_priv(dev);
310 struct dsa_switch *ds = p->parent;
312 if (sset == ETH_SS_STATS) {
316 if (ds->drv->get_sset_count != NULL)
317 count += ds->drv->get_sset_count(ds);
325 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
327 struct dsa_slave_priv *p = netdev_priv(dev);
328 struct dsa_switch *ds = p->parent;
330 if (ds->drv->get_wol)
331 ds->drv->get_wol(ds, p->port, w);
334 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
336 struct dsa_slave_priv *p = netdev_priv(dev);
337 struct dsa_switch *ds = p->parent;
338 int ret = -EOPNOTSUPP;
340 if (ds->drv->set_wol)
341 ret = ds->drv->set_wol(ds, p->port, w);
346 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
348 struct dsa_slave_priv *p = netdev_priv(dev);
349 struct dsa_switch *ds = p->parent;
352 if (!ds->drv->set_eee)
355 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
360 ret = phy_ethtool_set_eee(p->phy, e);
365 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
367 struct dsa_slave_priv *p = netdev_priv(dev);
368 struct dsa_switch *ds = p->parent;
371 if (!ds->drv->get_eee)
374 ret = ds->drv->get_eee(ds, p->port, e);
379 ret = phy_ethtool_get_eee(p->phy, e);
384 static const struct ethtool_ops dsa_slave_ethtool_ops = {
385 .get_settings = dsa_slave_get_settings,
386 .set_settings = dsa_slave_set_settings,
387 .get_drvinfo = dsa_slave_get_drvinfo,
388 .nway_reset = dsa_slave_nway_reset,
389 .get_link = dsa_slave_get_link,
390 .get_strings = dsa_slave_get_strings,
391 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
392 .get_sset_count = dsa_slave_get_sset_count,
393 .set_wol = dsa_slave_set_wol,
394 .get_wol = dsa_slave_get_wol,
395 .set_eee = dsa_slave_set_eee,
396 .get_eee = dsa_slave_get_eee,
399 static const struct net_device_ops dsa_slave_netdev_ops = {
400 .ndo_init = dsa_slave_init,
401 .ndo_open = dsa_slave_open,
402 .ndo_stop = dsa_slave_close,
403 .ndo_start_xmit = dsa_slave_xmit,
404 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
405 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
406 .ndo_set_mac_address = dsa_slave_set_mac_address,
407 .ndo_do_ioctl = dsa_slave_ioctl,
410 static void dsa_slave_adjust_link(struct net_device *dev)
412 struct dsa_slave_priv *p = netdev_priv(dev);
413 struct dsa_switch *ds = p->parent;
414 unsigned int status_changed = 0;
416 if (p->old_link != p->phy->link) {
418 p->old_link = p->phy->link;
421 if (p->old_duplex != p->phy->duplex) {
423 p->old_duplex = p->phy->duplex;
426 if (p->old_pause != p->phy->pause) {
428 p->old_pause = p->phy->pause;
431 if (ds->drv->adjust_link && status_changed)
432 ds->drv->adjust_link(ds, p->port, p->phy);
435 phy_print_status(p->phy);
438 static int dsa_slave_fixed_link_update(struct net_device *dev,
439 struct fixed_phy_status *status)
441 struct dsa_slave_priv *p = netdev_priv(dev);
442 struct dsa_switch *ds = p->parent;
444 if (ds->drv->fixed_link_update)
445 ds->drv->fixed_link_update(ds, p->port, status);
450 /* slave device setup *******************************************************/
451 static void dsa_slave_phy_setup(struct dsa_slave_priv *p,
452 struct net_device *slave_dev)
454 struct dsa_switch *ds = p->parent;
455 struct dsa_chip_data *cd = ds->pd;
456 struct device_node *phy_dn, *port_dn;
457 bool phy_is_fixed = false;
461 port_dn = cd->port_dn[p->port];
462 p->phy_interface = of_get_phy_mode(port_dn);
464 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
465 if (of_phy_is_fixed_link(port_dn)) {
466 /* In the case of a fixed PHY, the DT node associated
467 * to the fixed PHY is the Port DT node
469 ret = of_phy_register_fixed_link(port_dn);
471 pr_err("failed to register fixed PHY\n");
478 if (ds->drv->get_phy_flags)
479 phy_flags = ds->drv->get_phy_flags(ds, p->port);
482 p->phy = of_phy_connect(slave_dev, phy_dn,
483 dsa_slave_adjust_link, phy_flags,
486 if (p->phy && phy_is_fixed)
487 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
489 /* We could not connect to a designated PHY, so use the switch internal
493 p->phy = ds->slave_mii_bus->phy_map[p->port];
495 pr_info("attached PHY at address %d [%s]\n",
496 p->phy->addr, p->phy->drv->name);
499 int dsa_slave_suspend(struct net_device *slave_dev)
501 struct dsa_slave_priv *p = netdev_priv(slave_dev);
503 netif_device_detach(slave_dev);
516 int dsa_slave_resume(struct net_device *slave_dev)
518 struct dsa_slave_priv *p = netdev_priv(slave_dev);
520 netif_device_attach(slave_dev);
531 dsa_slave_create(struct dsa_switch *ds, struct device *parent,
532 int port, char *name)
534 struct net_device *master = ds->dst->master_netdev;
535 struct net_device *slave_dev;
536 struct dsa_slave_priv *p;
539 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
540 NET_NAME_UNKNOWN, ether_setup);
541 if (slave_dev == NULL)
544 slave_dev->features = master->vlan_features;
545 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
546 eth_hw_addr_inherit(slave_dev, master);
547 slave_dev->tx_queue_len = 0;
548 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
550 SET_NETDEV_DEV(slave_dev, parent);
551 slave_dev->dev.of_node = ds->pd->port_dn[port];
552 slave_dev->vlan_features = master->vlan_features;
554 p = netdev_priv(slave_dev);
559 switch (ds->dst->tag_protocol) {
560 #ifdef CONFIG_NET_DSA_TAG_DSA
561 case DSA_TAG_PROTO_DSA:
562 p->xmit = dsa_netdev_ops.xmit;
565 #ifdef CONFIG_NET_DSA_TAG_EDSA
566 case DSA_TAG_PROTO_EDSA:
567 p->xmit = edsa_netdev_ops.xmit;
570 #ifdef CONFIG_NET_DSA_TAG_TRAILER
571 case DSA_TAG_PROTO_TRAILER:
572 p->xmit = trailer_netdev_ops.xmit;
575 #ifdef CONFIG_NET_DSA_TAG_BRCM
576 case DSA_TAG_PROTO_BRCM:
577 p->xmit = brcm_netdev_ops.xmit;
581 p->xmit = dsa_slave_notag_xmit;
589 dsa_slave_phy_setup(p, slave_dev);
591 ret = register_netdev(slave_dev);
593 printk(KERN_ERR "%s: error %d registering interface %s\n",
594 master->name, ret, slave_dev->name);
595 free_netdev(slave_dev);
599 netif_carrier_off(slave_dev);
601 if (p->phy != NULL) {
602 if (ds->drv->get_phy_flags)
603 p->phy->dev_flags |= ds->drv->get_phy_flags(ds, port);
605 phy_attach(slave_dev, dev_name(&p->phy->dev),
606 PHY_INTERFACE_MODE_GMII);
608 p->phy->autoneg = AUTONEG_ENABLE;
611 p->phy->advertising = p->phy->supported | ADVERTISED_Autoneg;