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_get_regs_len(struct net_device *dev)
254 struct dsa_slave_priv *p = netdev_priv(dev);
255 struct dsa_switch *ds = p->parent;
257 if (ds->drv->get_regs_len)
258 return ds->drv->get_regs_len(ds, p->port);
264 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
266 struct dsa_slave_priv *p = netdev_priv(dev);
267 struct dsa_switch *ds = p->parent;
269 if (ds->drv->get_regs)
270 ds->drv->get_regs(ds, p->port, regs, _p);
273 static int dsa_slave_nway_reset(struct net_device *dev)
275 struct dsa_slave_priv *p = netdev_priv(dev);
278 return genphy_restart_aneg(p->phy);
283 static u32 dsa_slave_get_link(struct net_device *dev)
285 struct dsa_slave_priv *p = netdev_priv(dev);
287 if (p->phy != NULL) {
288 genphy_update_link(p->phy);
295 static int dsa_slave_get_eeprom_len(struct net_device *dev)
297 struct dsa_slave_priv *p = netdev_priv(dev);
298 struct dsa_switch *ds = p->parent;
300 if (ds->pd->eeprom_len)
301 return ds->pd->eeprom_len;
303 if (ds->drv->get_eeprom_len)
304 return ds->drv->get_eeprom_len(ds);
309 static int dsa_slave_get_eeprom(struct net_device *dev,
310 struct ethtool_eeprom *eeprom, u8 *data)
312 struct dsa_slave_priv *p = netdev_priv(dev);
313 struct dsa_switch *ds = p->parent;
315 if (ds->drv->get_eeprom)
316 return ds->drv->get_eeprom(ds, eeprom, data);
321 static int dsa_slave_set_eeprom(struct net_device *dev,
322 struct ethtool_eeprom *eeprom, u8 *data)
324 struct dsa_slave_priv *p = netdev_priv(dev);
325 struct dsa_switch *ds = p->parent;
327 if (ds->drv->set_eeprom)
328 return ds->drv->set_eeprom(ds, eeprom, data);
333 static void dsa_slave_get_strings(struct net_device *dev,
334 uint32_t stringset, uint8_t *data)
336 struct dsa_slave_priv *p = netdev_priv(dev);
337 struct dsa_switch *ds = p->parent;
339 if (stringset == ETH_SS_STATS) {
340 int len = ETH_GSTRING_LEN;
342 strncpy(data, "tx_packets", len);
343 strncpy(data + len, "tx_bytes", len);
344 strncpy(data + 2 * len, "rx_packets", len);
345 strncpy(data + 3 * len, "rx_bytes", len);
346 if (ds->drv->get_strings != NULL)
347 ds->drv->get_strings(ds, p->port, data + 4 * len);
351 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
352 struct ethtool_stats *stats,
355 struct dsa_slave_priv *p = netdev_priv(dev);
356 struct dsa_switch *ds = p->parent;
358 data[0] = p->dev->stats.tx_packets;
359 data[1] = p->dev->stats.tx_bytes;
360 data[2] = p->dev->stats.rx_packets;
361 data[3] = p->dev->stats.rx_bytes;
362 if (ds->drv->get_ethtool_stats != NULL)
363 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
366 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
368 struct dsa_slave_priv *p = netdev_priv(dev);
369 struct dsa_switch *ds = p->parent;
371 if (sset == ETH_SS_STATS) {
375 if (ds->drv->get_sset_count != NULL)
376 count += ds->drv->get_sset_count(ds);
384 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
386 struct dsa_slave_priv *p = netdev_priv(dev);
387 struct dsa_switch *ds = p->parent;
389 if (ds->drv->get_wol)
390 ds->drv->get_wol(ds, p->port, w);
393 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
395 struct dsa_slave_priv *p = netdev_priv(dev);
396 struct dsa_switch *ds = p->parent;
397 int ret = -EOPNOTSUPP;
399 if (ds->drv->set_wol)
400 ret = ds->drv->set_wol(ds, p->port, w);
405 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
407 struct dsa_slave_priv *p = netdev_priv(dev);
408 struct dsa_switch *ds = p->parent;
411 if (!ds->drv->set_eee)
414 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
419 ret = phy_ethtool_set_eee(p->phy, e);
424 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
426 struct dsa_slave_priv *p = netdev_priv(dev);
427 struct dsa_switch *ds = p->parent;
430 if (!ds->drv->get_eee)
433 ret = ds->drv->get_eee(ds, p->port, e);
438 ret = phy_ethtool_get_eee(p->phy, e);
443 static const struct ethtool_ops dsa_slave_ethtool_ops = {
444 .get_settings = dsa_slave_get_settings,
445 .set_settings = dsa_slave_set_settings,
446 .get_drvinfo = dsa_slave_get_drvinfo,
447 .get_regs_len = dsa_slave_get_regs_len,
448 .get_regs = dsa_slave_get_regs,
449 .nway_reset = dsa_slave_nway_reset,
450 .get_link = dsa_slave_get_link,
451 .get_eeprom_len = dsa_slave_get_eeprom_len,
452 .get_eeprom = dsa_slave_get_eeprom,
453 .set_eeprom = dsa_slave_set_eeprom,
454 .get_strings = dsa_slave_get_strings,
455 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
456 .get_sset_count = dsa_slave_get_sset_count,
457 .set_wol = dsa_slave_set_wol,
458 .get_wol = dsa_slave_get_wol,
459 .set_eee = dsa_slave_set_eee,
460 .get_eee = dsa_slave_get_eee,
463 static const struct net_device_ops dsa_slave_netdev_ops = {
464 .ndo_init = dsa_slave_init,
465 .ndo_open = dsa_slave_open,
466 .ndo_stop = dsa_slave_close,
467 .ndo_start_xmit = dsa_slave_xmit,
468 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
469 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
470 .ndo_set_mac_address = dsa_slave_set_mac_address,
471 .ndo_do_ioctl = dsa_slave_ioctl,
474 static void dsa_slave_adjust_link(struct net_device *dev)
476 struct dsa_slave_priv *p = netdev_priv(dev);
477 struct dsa_switch *ds = p->parent;
478 unsigned int status_changed = 0;
480 if (p->old_link != p->phy->link) {
482 p->old_link = p->phy->link;
485 if (p->old_duplex != p->phy->duplex) {
487 p->old_duplex = p->phy->duplex;
490 if (p->old_pause != p->phy->pause) {
492 p->old_pause = p->phy->pause;
495 if (ds->drv->adjust_link && status_changed)
496 ds->drv->adjust_link(ds, p->port, p->phy);
499 phy_print_status(p->phy);
502 static int dsa_slave_fixed_link_update(struct net_device *dev,
503 struct fixed_phy_status *status)
505 struct dsa_slave_priv *p = netdev_priv(dev);
506 struct dsa_switch *ds = p->parent;
508 if (ds->drv->fixed_link_update)
509 ds->drv->fixed_link_update(ds, p->port, status);
514 /* slave device setup *******************************************************/
515 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
516 struct net_device *slave_dev)
518 struct dsa_switch *ds = p->parent;
519 struct dsa_chip_data *cd = ds->pd;
520 struct device_node *phy_dn, *port_dn;
521 bool phy_is_fixed = false;
525 port_dn = cd->port_dn[p->port];
526 p->phy_interface = of_get_phy_mode(port_dn);
528 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
529 if (of_phy_is_fixed_link(port_dn)) {
530 /* In the case of a fixed PHY, the DT node associated
531 * to the fixed PHY is the Port DT node
533 ret = of_phy_register_fixed_link(port_dn);
535 netdev_err(slave_dev, "failed to register fixed PHY\n");
542 if (ds->drv->get_phy_flags)
543 phy_flags = ds->drv->get_phy_flags(ds, p->port);
546 p->phy = of_phy_connect(slave_dev, phy_dn,
547 dsa_slave_adjust_link, phy_flags,
550 if (p->phy && phy_is_fixed)
551 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
553 /* We could not connect to a designated PHY, so use the switch internal
557 p->phy = ds->slave_mii_bus->phy_map[p->port];
561 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
564 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
565 p->phy->addr, p->phy->drv->name);
571 int dsa_slave_suspend(struct net_device *slave_dev)
573 struct dsa_slave_priv *p = netdev_priv(slave_dev);
575 netif_device_detach(slave_dev);
588 int dsa_slave_resume(struct net_device *slave_dev)
590 struct dsa_slave_priv *p = netdev_priv(slave_dev);
592 netif_device_attach(slave_dev);
603 dsa_slave_create(struct dsa_switch *ds, struct device *parent,
604 int port, char *name)
606 struct net_device *master = ds->dst->master_netdev;
607 struct net_device *slave_dev;
608 struct dsa_slave_priv *p;
611 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
612 NET_NAME_UNKNOWN, ether_setup);
613 if (slave_dev == NULL)
616 slave_dev->features = master->vlan_features;
617 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
618 eth_hw_addr_inherit(slave_dev, master);
619 slave_dev->tx_queue_len = 0;
620 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
622 SET_NETDEV_DEV(slave_dev, parent);
623 slave_dev->dev.of_node = ds->pd->port_dn[port];
624 slave_dev->vlan_features = master->vlan_features;
626 p = netdev_priv(slave_dev);
631 switch (ds->dst->tag_protocol) {
632 #ifdef CONFIG_NET_DSA_TAG_DSA
633 case DSA_TAG_PROTO_DSA:
634 p->xmit = dsa_netdev_ops.xmit;
637 #ifdef CONFIG_NET_DSA_TAG_EDSA
638 case DSA_TAG_PROTO_EDSA:
639 p->xmit = edsa_netdev_ops.xmit;
642 #ifdef CONFIG_NET_DSA_TAG_TRAILER
643 case DSA_TAG_PROTO_TRAILER:
644 p->xmit = trailer_netdev_ops.xmit;
647 #ifdef CONFIG_NET_DSA_TAG_BRCM
648 case DSA_TAG_PROTO_BRCM:
649 p->xmit = brcm_netdev_ops.xmit;
653 p->xmit = dsa_slave_notag_xmit;
661 ret = dsa_slave_phy_setup(p, slave_dev);
663 free_netdev(slave_dev);
667 ret = register_netdev(slave_dev);
669 netdev_err(master, "error %d registering interface %s\n",
670 ret, slave_dev->name);
671 phy_disconnect(p->phy);
672 free_netdev(slave_dev);
676 netif_carrier_off(slave_dev);
678 if (p->phy != NULL) {
679 if (ds->drv->get_phy_flags)
680 p->phy->dev_flags |= ds->drv->get_phy_flags(ds, port);
682 phy_attach(slave_dev, dev_name(&p->phy->dev),
683 PHY_INTERFACE_MODE_GMII);
685 p->phy->autoneg = AUTONEG_ENABLE;
688 p->phy->advertising = p->phy->supported | ADVERTISED_Autoneg;