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
;