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;
49 ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
53 /* slave device handling ****************************************************/
54 static int dsa_slave_init(struct net_device *dev)
56 struct dsa_slave_priv *p = netdev_priv(dev);
58 dev->iflink = p->parent->dst->master_netdev->ifindex;
63 static int dsa_slave_open(struct net_device *dev)
65 struct dsa_slave_priv *p = netdev_priv(dev);
66 struct net_device *master = p->parent->dst->master_netdev;
67 struct dsa_switch *ds = p->parent;
70 if (!(master->flags & IFF_UP))
73 if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
74 err = dev_uc_add(master, dev->dev_addr);
79 if (dev->flags & IFF_ALLMULTI) {
80 err = dev_set_allmulti(master, 1);
84 if (dev->flags & IFF_PROMISC) {
85 err = dev_set_promiscuity(master, 1);
90 if (ds->drv->port_enable) {
91 err = ds->drv->port_enable(ds, p->port, p->phy);
102 if (dev->flags & IFF_PROMISC)
103 dev_set_promiscuity(master, 0);
105 if (dev->flags & IFF_ALLMULTI)
106 dev_set_allmulti(master, -1);
108 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
109 dev_uc_del(master, dev->dev_addr);
114 static int dsa_slave_close(struct net_device *dev)
116 struct dsa_slave_priv *p = netdev_priv(dev);
117 struct net_device *master = p->parent->dst->master_netdev;
118 struct dsa_switch *ds = p->parent;
123 dev_mc_unsync(master, dev);
124 dev_uc_unsync(master, dev);
125 if (dev->flags & IFF_ALLMULTI)
126 dev_set_allmulti(master, -1);
127 if (dev->flags & IFF_PROMISC)
128 dev_set_promiscuity(master, -1);
130 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
131 dev_uc_del(master, dev->dev_addr);
133 if (ds->drv->port_disable)
134 ds->drv->port_disable(ds, p->port, p->phy);
139 static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
141 struct dsa_slave_priv *p = netdev_priv(dev);
142 struct net_device *master = p->parent->dst->master_netdev;
144 if (change & IFF_ALLMULTI)
145 dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
146 if (change & IFF_PROMISC)
147 dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
150 static void dsa_slave_set_rx_mode(struct net_device *dev)
152 struct dsa_slave_priv *p = netdev_priv(dev);
153 struct net_device *master = p->parent->dst->master_netdev;
155 dev_mc_sync(master, dev);
156 dev_uc_sync(master, dev);
159 static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
161 struct dsa_slave_priv *p = netdev_priv(dev);
162 struct net_device *master = p->parent->dst->master_netdev;
163 struct sockaddr *addr = a;
166 if (!is_valid_ether_addr(addr->sa_data))
167 return -EADDRNOTAVAIL;
169 if (!(dev->flags & IFF_UP))
172 if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
173 err = dev_uc_add(master, addr->sa_data);
178 if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
179 dev_uc_del(master, dev->dev_addr);
182 ether_addr_copy(dev->dev_addr, addr->sa_data);
187 static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
189 struct dsa_slave_priv *p = netdev_priv(dev);
192 return phy_mii_ioctl(p->phy, ifr, cmd);
197 static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
199 struct dsa_slave_priv *p = netdev_priv(dev);
201 return p->xmit(skb, dev);
204 static netdev_tx_t dsa_slave_notag_xmit(struct sk_buff *skb,
205 struct net_device *dev)
207 struct dsa_slave_priv *p = netdev_priv(dev);
209 skb->dev = p->parent->dst->master_netdev;
216 /* ethtool operations *******************************************************/
218 dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
220 struct dsa_slave_priv *p = netdev_priv(dev);
224 if (p->phy != NULL) {
225 err = phy_read_status(p->phy);
227 err = phy_ethtool_gset(p->phy, cmd);
234 dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
236 struct dsa_slave_priv *p = netdev_priv(dev);
239 return phy_ethtool_sset(p->phy, cmd);
244 static void dsa_slave_get_drvinfo(struct net_device *dev,
245 struct ethtool_drvinfo *drvinfo)
247 strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
248 strlcpy(drvinfo->version, dsa_driver_version, sizeof(drvinfo->version));
249 strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
250 strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
253 static int dsa_slave_get_regs_len(struct net_device *dev)
255 struct dsa_slave_priv *p = netdev_priv(dev);
256 struct dsa_switch *ds = p->parent;
258 if (ds->drv->get_regs_len)
259 return ds->drv->get_regs_len(ds, p->port);
265 dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
267 struct dsa_slave_priv *p = netdev_priv(dev);
268 struct dsa_switch *ds = p->parent;
270 if (ds->drv->get_regs)
271 ds->drv->get_regs(ds, p->port, regs, _p);
274 static int dsa_slave_nway_reset(struct net_device *dev)
276 struct dsa_slave_priv *p = netdev_priv(dev);
279 return genphy_restart_aneg(p->phy);
284 static u32 dsa_slave_get_link(struct net_device *dev)
286 struct dsa_slave_priv *p = netdev_priv(dev);
288 if (p->phy != NULL) {
289 genphy_update_link(p->phy);
296 static int dsa_slave_get_eeprom_len(struct net_device *dev)
298 struct dsa_slave_priv *p = netdev_priv(dev);
299 struct dsa_switch *ds = p->parent;
301 if (ds->pd->eeprom_len)
302 return ds->pd->eeprom_len;
304 if (ds->drv->get_eeprom_len)
305 return ds->drv->get_eeprom_len(ds);
310 static int dsa_slave_get_eeprom(struct net_device *dev,
311 struct ethtool_eeprom *eeprom, u8 *data)
313 struct dsa_slave_priv *p = netdev_priv(dev);
314 struct dsa_switch *ds = p->parent;
316 if (ds->drv->get_eeprom)
317 return ds->drv->get_eeprom(ds, eeprom, data);
322 static int dsa_slave_set_eeprom(struct net_device *dev,
323 struct ethtool_eeprom *eeprom, u8 *data)
325 struct dsa_slave_priv *p = netdev_priv(dev);
326 struct dsa_switch *ds = p->parent;
328 if (ds->drv->set_eeprom)
329 return ds->drv->set_eeprom(ds, eeprom, data);
334 static void dsa_slave_get_strings(struct net_device *dev,
335 uint32_t stringset, uint8_t *data)
337 struct dsa_slave_priv *p = netdev_priv(dev);
338 struct dsa_switch *ds = p->parent;
340 if (stringset == ETH_SS_STATS) {
341 int len = ETH_GSTRING_LEN;
343 strncpy(data, "tx_packets", len);
344 strncpy(data + len, "tx_bytes", len);
345 strncpy(data + 2 * len, "rx_packets", len);
346 strncpy(data + 3 * len, "rx_bytes", len);
347 if (ds->drv->get_strings != NULL)
348 ds->drv->get_strings(ds, p->port, data + 4 * len);
352 static void dsa_slave_get_ethtool_stats(struct net_device *dev,
353 struct ethtool_stats *stats,
356 struct dsa_slave_priv *p = netdev_priv(dev);
357 struct dsa_switch *ds = p->parent;
359 data[0] = p->dev->stats.tx_packets;
360 data[1] = p->dev->stats.tx_bytes;
361 data[2] = p->dev->stats.rx_packets;
362 data[3] = p->dev->stats.rx_bytes;
363 if (ds->drv->get_ethtool_stats != NULL)
364 ds->drv->get_ethtool_stats(ds, p->port, data + 4);
367 static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
369 struct dsa_slave_priv *p = netdev_priv(dev);
370 struct dsa_switch *ds = p->parent;
372 if (sset == ETH_SS_STATS) {
376 if (ds->drv->get_sset_count != NULL)
377 count += ds->drv->get_sset_count(ds);
385 static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
387 struct dsa_slave_priv *p = netdev_priv(dev);
388 struct dsa_switch *ds = p->parent;
390 if (ds->drv->get_wol)
391 ds->drv->get_wol(ds, p->port, w);
394 static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
396 struct dsa_slave_priv *p = netdev_priv(dev);
397 struct dsa_switch *ds = p->parent;
398 int ret = -EOPNOTSUPP;
400 if (ds->drv->set_wol)
401 ret = ds->drv->set_wol(ds, p->port, w);
406 static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
408 struct dsa_slave_priv *p = netdev_priv(dev);
409 struct dsa_switch *ds = p->parent;
412 if (!ds->drv->set_eee)
415 ret = ds->drv->set_eee(ds, p->port, p->phy, e);
420 ret = phy_ethtool_set_eee(p->phy, e);
425 static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
427 struct dsa_slave_priv *p = netdev_priv(dev);
428 struct dsa_switch *ds = p->parent;
431 if (!ds->drv->get_eee)
434 ret = ds->drv->get_eee(ds, p->port, e);
439 ret = phy_ethtool_get_eee(p->phy, e);
444 static const struct ethtool_ops dsa_slave_ethtool_ops = {
445 .get_settings = dsa_slave_get_settings,
446 .set_settings = dsa_slave_set_settings,
447 .get_drvinfo = dsa_slave_get_drvinfo,
448 .get_regs_len = dsa_slave_get_regs_len,
449 .get_regs = dsa_slave_get_regs,
450 .nway_reset = dsa_slave_nway_reset,
451 .get_link = dsa_slave_get_link,
452 .get_eeprom_len = dsa_slave_get_eeprom_len,
453 .get_eeprom = dsa_slave_get_eeprom,
454 .set_eeprom = dsa_slave_set_eeprom,
455 .get_strings = dsa_slave_get_strings,
456 .get_ethtool_stats = dsa_slave_get_ethtool_stats,
457 .get_sset_count = dsa_slave_get_sset_count,
458 .set_wol = dsa_slave_set_wol,
459 .get_wol = dsa_slave_get_wol,
460 .set_eee = dsa_slave_set_eee,
461 .get_eee = dsa_slave_get_eee,
464 static const struct net_device_ops dsa_slave_netdev_ops = {
465 .ndo_init = dsa_slave_init,
466 .ndo_open = dsa_slave_open,
467 .ndo_stop = dsa_slave_close,
468 .ndo_start_xmit = dsa_slave_xmit,
469 .ndo_change_rx_flags = dsa_slave_change_rx_flags,
470 .ndo_set_rx_mode = dsa_slave_set_rx_mode,
471 .ndo_set_mac_address = dsa_slave_set_mac_address,
472 .ndo_do_ioctl = dsa_slave_ioctl,
475 static void dsa_slave_adjust_link(struct net_device *dev)
477 struct dsa_slave_priv *p = netdev_priv(dev);
478 struct dsa_switch *ds = p->parent;
479 unsigned int status_changed = 0;
481 if (p->old_link != p->phy->link) {
483 p->old_link = p->phy->link;
486 if (p->old_duplex != p->phy->duplex) {
488 p->old_duplex = p->phy->duplex;
491 if (p->old_pause != p->phy->pause) {
493 p->old_pause = p->phy->pause;
496 if (ds->drv->adjust_link && status_changed)
497 ds->drv->adjust_link(ds, p->port, p->phy);
500 phy_print_status(p->phy);
503 static int dsa_slave_fixed_link_update(struct net_device *dev,
504 struct fixed_phy_status *status)
506 struct dsa_slave_priv *p = netdev_priv(dev);
507 struct dsa_switch *ds = p->parent;
509 if (ds->drv->fixed_link_update)
510 ds->drv->fixed_link_update(ds, p->port, status);
515 /* slave device setup *******************************************************/
516 static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
517 struct net_device *slave_dev)
519 struct dsa_switch *ds = p->parent;
520 struct dsa_chip_data *cd = ds->pd;
521 struct device_node *phy_dn, *port_dn;
522 bool phy_is_fixed = false;
526 port_dn = cd->port_dn[p->port];
527 p->phy_interface = of_get_phy_mode(port_dn);
529 phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
530 if (of_phy_is_fixed_link(port_dn)) {
531 /* In the case of a fixed PHY, the DT node associated
532 * to the fixed PHY is the Port DT node
534 ret = of_phy_register_fixed_link(port_dn);
536 netdev_err(slave_dev, "failed to register fixed PHY\n");
543 if (ds->drv->get_phy_flags)
544 phy_flags = ds->drv->get_phy_flags(ds, p->port);
547 p->phy = of_phy_connect(slave_dev, phy_dn,
548 dsa_slave_adjust_link, phy_flags,
551 if (p->phy && phy_is_fixed)
552 fixed_phy_set_link_update(p->phy, dsa_slave_fixed_link_update);
554 /* We could not connect to a designated PHY, so use the switch internal
558 p->phy = ds->slave_mii_bus->phy_map[p->port];
562 phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
565 netdev_info(slave_dev, "attached PHY at address %d [%s]\n",
566 p->phy->addr, p->phy->drv->name);
572 int dsa_slave_suspend(struct net_device *slave_dev)
574 struct dsa_slave_priv *p = netdev_priv(slave_dev);
576 netif_device_detach(slave_dev);
589 int dsa_slave_resume(struct net_device *slave_dev)
591 struct dsa_slave_priv *p = netdev_priv(slave_dev);
593 netif_device_attach(slave_dev);
604 dsa_slave_create(struct dsa_switch *ds, struct device *parent,
605 int port, char *name)
607 struct net_device *master = ds->dst->master_netdev;
608 struct net_device *slave_dev;
609 struct dsa_slave_priv *p;
612 slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv), name,
613 NET_NAME_UNKNOWN, ether_setup);
614 if (slave_dev == NULL)
617 slave_dev->features = master->vlan_features;
618 slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
619 eth_hw_addr_inherit(slave_dev, master);
620 slave_dev->tx_queue_len = 0;
621 slave_dev->netdev_ops = &dsa_slave_netdev_ops;
623 SET_NETDEV_DEV(slave_dev, parent);
624 slave_dev->dev.of_node = ds->pd->port_dn[port];
625 slave_dev->vlan_features = master->vlan_features;
627 p = netdev_priv(slave_dev);
632 switch (ds->dst->tag_protocol) {
633 #ifdef CONFIG_NET_DSA_TAG_DSA
634 case DSA_TAG_PROTO_DSA:
635 p->xmit = dsa_netdev_ops.xmit;
638 #ifdef CONFIG_NET_DSA_TAG_EDSA
639 case DSA_TAG_PROTO_EDSA:
640 p->xmit = edsa_netdev_ops.xmit;
643 #ifdef CONFIG_NET_DSA_TAG_TRAILER
644 case DSA_TAG_PROTO_TRAILER:
645 p->xmit = trailer_netdev_ops.xmit;
648 #ifdef CONFIG_NET_DSA_TAG_BRCM
649 case DSA_TAG_PROTO_BRCM:
650 p->xmit = brcm_netdev_ops.xmit;
654 p->xmit = dsa_slave_notag_xmit;
662 ret = dsa_slave_phy_setup(p, slave_dev);
664 free_netdev(slave_dev);
668 ret = register_netdev(slave_dev);
670 netdev_err(master, "error %d registering interface %s\n",
671 ret, slave_dev->name);
672 phy_disconnect(p->phy);
673 free_netdev(slave_dev);
677 netif_carrier_off(slave_dev);
679 if (p->phy != NULL) {
680 if (ds->drv->get_phy_flags)
681 p->phy->dev_flags |= ds->drv->get_phy_flags(ds, port);
683 phy_attach(slave_dev, dev_name(&p->phy->dev),
684 PHY_INTERFACE_MODE_GMII);
686 p->phy->autoneg = AUTONEG_ENABLE;
689 p->phy->advertising = p->phy->supported | ADVERTISED_Autoneg;