2 * phylink models the MAC to optional PHY connection, supporting
3 * technologies such as SFP cages where the PHY is hot-pluggable.
5 * Copyright (C) 2015 Russell King
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 #include <linux/ethtool.h>
12 #include <linux/export.h>
13 #include <linux/gpio/consumer.h>
14 #include <linux/netdevice.h>
16 #include <linux/of_mdio.h>
17 #include <linux/phy.h>
18 #include <linux/phy_fixed.h>
19 #include <linux/phylink.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/spinlock.h>
22 #include <linux/timer.h>
23 #include <linux/workqueue.h>
28 #define SUPPORTED_INTERFACES \
29 (SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \
30 SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane)
31 #define ADVERTISED_INTERFACES \
32 (ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \
33 ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane)
36 PHYLINK_DISABLE_STOPPED,
41 * struct phylink - internal data type for phylink
45 struct net_device *netdev;
46 const struct phylink_mac_ops *ops;
48 unsigned long phylink_disable_state; /* bitmask of disables */
49 struct phy_device *phydev;
50 phy_interface_t link_interface; /* PHY_INTERFACE_xxx */
51 u8 link_an_mode; /* MLO_AN_xxx */
52 u8 link_port; /* The current non-phy ethtool port */
53 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
55 /* The link configuration settings */
56 struct phylink_link_state link_config;
57 struct gpio_desc *link_gpio;
58 struct timer_list link_poll;
59 void (*get_fixed_state)(struct net_device *dev,
60 struct phylink_link_state *s);
62 struct mutex state_mutex;
63 struct phylink_link_state phy_state;
64 struct work_struct resolve;
66 bool mac_link_dropped;
68 struct sfp_bus *sfp_bus;
72 * phylink_set_port_modes() - set the port type modes in the ethtool mask
73 * @mask: ethtool link mode mask
75 * Sets all the port type modes in the ethtool mask. MAC drivers should
76 * use this in their 'validate' callback.
78 void phylink_set_port_modes(unsigned long *mask)
80 phylink_set(mask, TP);
81 phylink_set(mask, AUI);
82 phylink_set(mask, MII);
83 phylink_set(mask, FIBRE);
84 phylink_set(mask, BNC);
85 phylink_set(mask, Backplane);
87 EXPORT_SYMBOL_GPL(phylink_set_port_modes);
89 static int phylink_is_empty_linkmode(const unsigned long *linkmode)
91 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, };
93 phylink_set_port_modes(tmp);
94 phylink_set(tmp, Autoneg);
95 phylink_set(tmp, Pause);
96 phylink_set(tmp, Asym_Pause);
98 bitmap_andnot(tmp, linkmode, tmp, __ETHTOOL_LINK_MODE_MASK_NBITS);
100 return linkmode_empty(tmp);
103 static const char *phylink_an_mode_str(unsigned int mode)
105 static const char *modestr[] = {
106 [MLO_AN_PHY] = "phy",
107 [MLO_AN_FIXED] = "fixed",
108 [MLO_AN_INBAND] = "inband",
111 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown";
114 static int phylink_validate(struct phylink *pl, unsigned long *supported,
115 struct phylink_link_state *state)
117 pl->ops->validate(pl->netdev, supported, state);
119 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0;
122 static int phylink_parse_fixedlink(struct phylink *pl,
123 struct fwnode_handle *fwnode)
125 struct fwnode_handle *fixed_node;
126 const struct phy_setting *s;
127 struct gpio_desc *desc;
131 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link");
133 ret = fwnode_property_read_u32(fixed_node, "speed", &speed);
135 pl->link_config.speed = speed;
136 pl->link_config.duplex = DUPLEX_HALF;
138 if (fwnode_property_read_bool(fixed_node, "full-duplex"))
139 pl->link_config.duplex = DUPLEX_FULL;
141 /* We treat the "pause" and "asym-pause" terminology as
142 * defining the link partner's ability. */
143 if (fwnode_property_read_bool(fixed_node, "pause"))
144 pl->link_config.pause |= MLO_PAUSE_SYM;
145 if (fwnode_property_read_bool(fixed_node, "asym-pause"))
146 pl->link_config.pause |= MLO_PAUSE_ASYM;
149 desc = fwnode_get_named_gpiod(fixed_node, "link-gpios",
153 pl->link_gpio = desc;
154 else if (desc == ERR_PTR(-EPROBE_DEFER))
157 fwnode_handle_put(fixed_node);
164 ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
166 if (ret != ARRAY_SIZE(prop)) {
167 netdev_err(pl->netdev, "broken fixed-link?\n");
171 ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
172 prop, ARRAY_SIZE(prop));
174 pl->link_config.duplex = prop[1] ?
175 DUPLEX_FULL : DUPLEX_HALF;
176 pl->link_config.speed = prop[2];
178 pl->link_config.pause |= MLO_PAUSE_SYM;
180 pl->link_config.pause |= MLO_PAUSE_ASYM;
184 if (pl->link_config.speed > SPEED_1000 &&
185 pl->link_config.duplex != DUPLEX_FULL)
186 netdev_warn(pl->netdev, "fixed link specifies half duplex for %dMbps link?\n",
187 pl->link_config.speed);
189 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
190 linkmode_copy(pl->link_config.advertising, pl->supported);
191 phylink_validate(pl, pl->supported, &pl->link_config);
193 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex,
194 pl->supported, true);
195 linkmode_zero(pl->supported);
196 phylink_set(pl->supported, MII);
198 __set_bit(s->bit, pl->supported);
200 netdev_warn(pl->netdev, "fixed link %s duplex %dMbps not recognised\n",
201 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half",
202 pl->link_config.speed);
205 linkmode_and(pl->link_config.advertising, pl->link_config.advertising,
208 pl->link_config.link = 1;
209 pl->link_config.an_complete = 1;
214 static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode)
216 struct fwnode_handle *dn;
219 dn = fwnode_get_named_child_node(fwnode, "fixed-link");
220 if (dn || fwnode_property_present(fwnode, "fixed-link"))
221 pl->link_an_mode = MLO_AN_FIXED;
222 fwnode_handle_put(dn);
224 if (fwnode_property_read_string(fwnode, "managed", &managed) == 0 &&
225 strcmp(managed, "in-band-status") == 0) {
226 if (pl->link_an_mode == MLO_AN_FIXED) {
227 netdev_err(pl->netdev,
228 "can't use both fixed-link and in-band-status\n");
232 linkmode_zero(pl->supported);
233 phylink_set(pl->supported, MII);
234 phylink_set(pl->supported, Autoneg);
235 phylink_set(pl->supported, Asym_Pause);
236 phylink_set(pl->supported, Pause);
237 pl->link_config.an_enabled = true;
238 pl->link_an_mode = MLO_AN_INBAND;
240 switch (pl->link_config.interface) {
241 case PHY_INTERFACE_MODE_SGMII:
242 phylink_set(pl->supported, 10baseT_Half);
243 phylink_set(pl->supported, 10baseT_Full);
244 phylink_set(pl->supported, 100baseT_Half);
245 phylink_set(pl->supported, 100baseT_Full);
246 phylink_set(pl->supported, 1000baseT_Half);
247 phylink_set(pl->supported, 1000baseT_Full);
250 case PHY_INTERFACE_MODE_1000BASEX:
251 phylink_set(pl->supported, 1000baseX_Full);
254 case PHY_INTERFACE_MODE_2500BASEX:
255 phylink_set(pl->supported, 2500baseX_Full);
258 case PHY_INTERFACE_MODE_10GKR:
259 phylink_set(pl->supported, 10baseT_Half);
260 phylink_set(pl->supported, 10baseT_Full);
261 phylink_set(pl->supported, 100baseT_Half);
262 phylink_set(pl->supported, 100baseT_Full);
263 phylink_set(pl->supported, 1000baseT_Half);
264 phylink_set(pl->supported, 1000baseT_Full);
265 phylink_set(pl->supported, 1000baseX_Full);
266 phylink_set(pl->supported, 10000baseKR_Full);
267 phylink_set(pl->supported, 10000baseCR_Full);
268 phylink_set(pl->supported, 10000baseSR_Full);
269 phylink_set(pl->supported, 10000baseLR_Full);
270 phylink_set(pl->supported, 10000baseLRM_Full);
271 phylink_set(pl->supported, 10000baseER_Full);
275 netdev_err(pl->netdev,
276 "incorrect link mode %s for in-band status\n",
277 phy_modes(pl->link_config.interface));
281 linkmode_copy(pl->link_config.advertising, pl->supported);
283 if (phylink_validate(pl, pl->supported, &pl->link_config)) {
284 netdev_err(pl->netdev,
285 "failed to validate link configuration for in-band status\n");
293 static void phylink_mac_config(struct phylink *pl,
294 const struct phylink_link_state *state)
296 netdev_dbg(pl->netdev,
297 "%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n",
298 __func__, phylink_an_mode_str(pl->link_an_mode),
299 phy_modes(state->interface),
300 phy_speed_to_str(state->speed),
301 phy_duplex_to_str(state->duplex),
302 __ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising,
303 state->pause, state->link, state->an_enabled);
305 pl->ops->mac_config(pl->netdev, pl->link_an_mode, state);
308 static void phylink_mac_an_restart(struct phylink *pl)
310 if (pl->link_config.an_enabled &&
311 phy_interface_mode_is_8023z(pl->link_config.interface))
312 pl->ops->mac_an_restart(pl->netdev);
315 static int phylink_get_mac_state(struct phylink *pl, struct phylink_link_state *state)
317 struct net_device *ndev = pl->netdev;
319 linkmode_copy(state->advertising, pl->link_config.advertising);
320 linkmode_zero(state->lp_advertising);
321 state->interface = pl->link_config.interface;
322 state->an_enabled = pl->link_config.an_enabled;
325 return pl->ops->mac_link_state(ndev, state);
328 /* The fixed state is... fixed except for the link state,
329 * which may be determined by a GPIO or a callback.
331 static void phylink_get_fixed_state(struct phylink *pl, struct phylink_link_state *state)
333 *state = pl->link_config;
334 if (pl->get_fixed_state)
335 pl->get_fixed_state(pl->netdev, state);
336 else if (pl->link_gpio)
337 state->link = !!gpiod_get_value_cansleep(pl->link_gpio);
340 /* Flow control is resolved according to our and the link partners
341 * advertisements using the following drawn from the 802.3 specs:
342 * Local device Link partner
343 * Pause AsymDir Pause AsymDir Result
348 static void phylink_resolve_flow(struct phylink *pl,
349 struct phylink_link_state *state)
353 if (pl->link_config.pause & MLO_PAUSE_AN) {
356 if (phylink_test(pl->link_config.advertising, Pause))
357 pause |= MLO_PAUSE_SYM;
358 if (phylink_test(pl->link_config.advertising, Asym_Pause))
359 pause |= MLO_PAUSE_ASYM;
361 pause &= state->pause;
363 if (pause & MLO_PAUSE_SYM)
364 new_pause = MLO_PAUSE_TX | MLO_PAUSE_RX;
365 else if (pause & MLO_PAUSE_ASYM)
366 new_pause = state->pause & MLO_PAUSE_SYM ?
367 MLO_PAUSE_RX : MLO_PAUSE_TX;
369 new_pause = pl->link_config.pause & MLO_PAUSE_TXRX_MASK;
372 state->pause &= ~MLO_PAUSE_TXRX_MASK;
373 state->pause |= new_pause;
376 static const char *phylink_pause_to_str(int pause)
378 switch (pause & MLO_PAUSE_TXRX_MASK) {
379 case MLO_PAUSE_TX | MLO_PAUSE_RX:
390 static void phylink_resolve(struct work_struct *w)
392 struct phylink *pl = container_of(w, struct phylink, resolve);
393 struct phylink_link_state link_state;
394 struct net_device *ndev = pl->netdev;
396 mutex_lock(&pl->state_mutex);
397 if (pl->phylink_disable_state) {
398 pl->mac_link_dropped = false;
399 link_state.link = false;
400 } else if (pl->mac_link_dropped) {
401 link_state.link = false;
403 switch (pl->link_an_mode) {
405 link_state = pl->phy_state;
406 phylink_resolve_flow(pl, &link_state);
407 phylink_mac_config(pl, &link_state);
411 phylink_get_fixed_state(pl, &link_state);
412 phylink_mac_config(pl, &link_state);
416 phylink_get_mac_state(pl, &link_state);
418 bool changed = false;
420 link_state.link = link_state.link &&
423 if (pl->phy_state.interface !=
424 link_state.interface) {
425 link_state.interface = pl->phy_state.interface;
429 /* Propagate the flow control from the PHY
430 * to the MAC. Also propagate the interface
433 if (pl->phy_state.link || changed) {
434 link_state.pause |= pl->phy_state.pause;
435 phylink_resolve_flow(pl, &link_state);
437 phylink_mac_config(pl, &link_state);
444 if (link_state.link != netif_carrier_ok(ndev)) {
445 if (!link_state.link) {
446 netif_carrier_off(ndev);
447 pl->ops->mac_link_down(ndev, pl->link_an_mode,
448 pl->phy_state.interface);
449 netdev_info(ndev, "Link is Down\n");
451 pl->ops->mac_link_up(ndev, pl->link_an_mode,
452 pl->phy_state.interface,
455 netif_carrier_on(ndev);
458 "Link is Up - %s/%s - flow control %s\n",
459 phy_speed_to_str(link_state.speed),
460 phy_duplex_to_str(link_state.duplex),
461 phylink_pause_to_str(link_state.pause));
464 if (!link_state.link && pl->mac_link_dropped) {
465 pl->mac_link_dropped = false;
466 queue_work(system_power_efficient_wq, &pl->resolve);
468 mutex_unlock(&pl->state_mutex);
471 static void phylink_run_resolve(struct phylink *pl)
473 if (!pl->phylink_disable_state)
474 queue_work(system_power_efficient_wq, &pl->resolve);
477 static void phylink_fixed_poll(struct timer_list *t)
479 struct phylink *pl = container_of(t, struct phylink, link_poll);
481 mod_timer(t, jiffies + HZ);
483 phylink_run_resolve(pl);
486 static const struct sfp_upstream_ops sfp_phylink_ops;
488 static int phylink_register_sfp(struct phylink *pl,
489 struct fwnode_handle *fwnode)
491 struct fwnode_reference_args ref;
497 ret = fwnode_property_get_reference_args(fwnode, "sfp", NULL,
503 netdev_err(pl->netdev, "unable to parse \"sfp\" node: %d\n",
508 pl->sfp_bus = sfp_register_upstream(ref.fwnode, pl->netdev, pl,
517 * phylink_create() - create a phylink instance
518 * @ndev: a pointer to the &struct net_device
519 * @fwnode: a pointer to a &struct fwnode_handle describing the network
521 * @iface: the desired link mode defined by &typedef phy_interface_t
522 * @ops: a pointer to a &struct phylink_mac_ops for the MAC.
524 * Create a new phylink instance, and parse the link parameters found in @np.
525 * This will parse in-band modes, fixed-link or SFP configuration.
527 * Returns a pointer to a &struct phylink, or an error-pointer value. Users
528 * must use IS_ERR() to check for errors from this function.
530 struct phylink *phylink_create(struct net_device *ndev,
531 struct fwnode_handle *fwnode,
532 phy_interface_t iface,
533 const struct phylink_mac_ops *ops)
538 pl = kzalloc(sizeof(*pl), GFP_KERNEL);
540 return ERR_PTR(-ENOMEM);
542 mutex_init(&pl->state_mutex);
543 INIT_WORK(&pl->resolve, phylink_resolve);
545 pl->phy_state.interface = iface;
546 pl->link_interface = iface;
547 if (iface == PHY_INTERFACE_MODE_MOCA)
548 pl->link_port = PORT_BNC;
550 pl->link_port = PORT_MII;
551 pl->link_config.interface = iface;
552 pl->link_config.pause = MLO_PAUSE_AN;
553 pl->link_config.speed = SPEED_UNKNOWN;
554 pl->link_config.duplex = DUPLEX_UNKNOWN;
555 pl->link_config.an_enabled = true;
557 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
558 timer_setup(&pl->link_poll, phylink_fixed_poll, 0);
560 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
561 linkmode_copy(pl->link_config.advertising, pl->supported);
562 phylink_validate(pl, pl->supported, &pl->link_config);
564 ret = phylink_parse_mode(pl, fwnode);
570 if (pl->link_an_mode == MLO_AN_FIXED) {
571 ret = phylink_parse_fixedlink(pl, fwnode);
578 ret = phylink_register_sfp(pl, fwnode);
586 EXPORT_SYMBOL_GPL(phylink_create);
589 * phylink_destroy() - cleanup and destroy the phylink instance
590 * @pl: a pointer to a &struct phylink returned from phylink_create()
592 * Destroy a phylink instance. Any PHY that has been attached must have been
593 * cleaned up via phylink_disconnect_phy() prior to calling this function.
595 void phylink_destroy(struct phylink *pl)
598 sfp_unregister_upstream(pl->sfp_bus);
599 if (!IS_ERR_OR_NULL(pl->link_gpio))
600 gpiod_put(pl->link_gpio);
602 cancel_work_sync(&pl->resolve);
605 EXPORT_SYMBOL_GPL(phylink_destroy);
607 static void phylink_phy_change(struct phy_device *phydev, bool up,
610 struct phylink *pl = phydev->phylink;
612 mutex_lock(&pl->state_mutex);
613 pl->phy_state.speed = phydev->speed;
614 pl->phy_state.duplex = phydev->duplex;
615 pl->phy_state.pause = MLO_PAUSE_NONE;
617 pl->phy_state.pause |= MLO_PAUSE_SYM;
618 if (phydev->asym_pause)
619 pl->phy_state.pause |= MLO_PAUSE_ASYM;
620 pl->phy_state.interface = phydev->interface;
621 pl->phy_state.link = up;
622 mutex_unlock(&pl->state_mutex);
624 phylink_run_resolve(pl);
626 netdev_dbg(pl->netdev, "phy link %s %s/%s/%s\n", up ? "up" : "down",
627 phy_modes(phydev->interface),
628 phy_speed_to_str(phydev->speed),
629 phy_duplex_to_str(phydev->duplex));
632 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy)
634 struct phylink_link_state config;
635 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
638 memset(&config, 0, sizeof(config));
639 linkmode_copy(supported, phy->supported);
640 linkmode_copy(config.advertising, phy->advertising);
641 config.interface = pl->link_config.interface;
644 * This is the new way of dealing with flow control for PHYs,
645 * as described by Timur Tabi in commit 529ed1275263 ("net: phy:
646 * phy drivers should not set SUPPORTED_[Asym_]Pause") except
647 * using our validate call to the MAC, we rely upon the MAC
648 * clearing the bits from both supported and advertising fields.
650 if (phylink_test(supported, Pause))
651 phylink_set(config.advertising, Pause);
652 if (phylink_test(supported, Asym_Pause))
653 phylink_set(config.advertising, Asym_Pause);
655 ret = phylink_validate(pl, supported, &config);
660 phy->phy_link_change = phylink_phy_change;
662 netdev_info(pl->netdev,
663 "PHY [%s] driver [%s]\n", dev_name(&phy->mdio.dev),
666 mutex_lock(&phy->lock);
667 mutex_lock(&pl->state_mutex);
669 linkmode_copy(pl->supported, supported);
670 linkmode_copy(pl->link_config.advertising, config.advertising);
672 /* Restrict the phy advertisement according to the MAC support. */
673 linkmode_copy(phy->advertising, config.advertising);
674 mutex_unlock(&pl->state_mutex);
675 mutex_unlock(&phy->lock);
677 netdev_dbg(pl->netdev,
678 "phy: setting supported %*pb advertising %*pb\n",
679 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported,
680 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising);
682 phy_start_machine(phy);
684 phy_start_interrupts(phy);
689 static int __phylink_connect_phy(struct phylink *pl, struct phy_device *phy,
690 phy_interface_t interface)
694 if (WARN_ON(pl->link_an_mode == MLO_AN_FIXED ||
695 (pl->link_an_mode == MLO_AN_INBAND &&
696 phy_interface_mode_is_8023z(interface))))
702 ret = phy_attach_direct(pl->netdev, phy, 0, interface);
706 ret = phylink_bringup_phy(pl, phy);
714 * phylink_connect_phy() - connect a PHY to the phylink instance
715 * @pl: a pointer to a &struct phylink returned from phylink_create()
716 * @phy: a pointer to a &struct phy_device.
718 * Connect @phy to the phylink instance specified by @pl by calling
719 * phy_attach_direct(). Configure the @phy according to the MAC driver's
720 * capabilities, start the PHYLIB state machine and enable any interrupts
721 * that the PHY supports.
723 * This updates the phylink's ethtool supported and advertising link mode
726 * Returns 0 on success or a negative errno.
728 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy)
730 /* Use PHY device/driver interface */
731 if (pl->link_interface == PHY_INTERFACE_MODE_NA) {
732 pl->link_interface = phy->interface;
733 pl->link_config.interface = pl->link_interface;
736 return __phylink_connect_phy(pl, phy, pl->link_interface);
738 EXPORT_SYMBOL_GPL(phylink_connect_phy);
741 * phylink_of_phy_connect() - connect the PHY specified in the DT mode.
742 * @pl: a pointer to a &struct phylink returned from phylink_create()
743 * @dn: a pointer to a &struct device_node.
744 * @flags: PHY-specific flags to communicate to the PHY device driver
746 * Connect the phy specified in the device node @dn to the phylink instance
747 * specified by @pl. Actions specified in phylink_connect_phy() will be
750 * Returns 0 on success or a negative errno.
752 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn,
755 struct device_node *phy_node;
756 struct phy_device *phy_dev;
759 /* Fixed links and 802.3z are handled without needing a PHY */
760 if (pl->link_an_mode == MLO_AN_FIXED ||
761 (pl->link_an_mode == MLO_AN_INBAND &&
762 phy_interface_mode_is_8023z(pl->link_interface)))
765 phy_node = of_parse_phandle(dn, "phy-handle", 0);
767 phy_node = of_parse_phandle(dn, "phy", 0);
769 phy_node = of_parse_phandle(dn, "phy-device", 0);
772 if (pl->link_an_mode == MLO_AN_PHY)
777 phy_dev = of_phy_attach(pl->netdev, phy_node, flags,
779 /* We're done with the phy_node handle */
780 of_node_put(phy_node);
785 ret = phylink_bringup_phy(pl, phy_dev);
791 EXPORT_SYMBOL_GPL(phylink_of_phy_connect);
794 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink
796 * @pl: a pointer to a &struct phylink returned from phylink_create()
798 * Disconnect any current PHY from the phylink instance described by @pl.
800 void phylink_disconnect_phy(struct phylink *pl)
802 struct phy_device *phy;
808 mutex_lock(&phy->lock);
809 mutex_lock(&pl->state_mutex);
811 mutex_unlock(&pl->state_mutex);
812 mutex_unlock(&phy->lock);
813 flush_work(&pl->resolve);
818 EXPORT_SYMBOL_GPL(phylink_disconnect_phy);
821 * phylink_fixed_state_cb() - allow setting a fixed link callback
822 * @pl: a pointer to a &struct phylink returned from phylink_create()
823 * @cb: callback to execute to determine the fixed link state.
825 * The MAC driver should call this driver when the state of its link
826 * can be determined through e.g: an out of band MMIO register.
828 int phylink_fixed_state_cb(struct phylink *pl,
829 void (*cb)(struct net_device *dev,
830 struct phylink_link_state *state))
832 /* It does not make sense to let the link be overriden unless we use
835 if (pl->link_an_mode != MLO_AN_FIXED)
838 mutex_lock(&pl->state_mutex);
839 pl->get_fixed_state = cb;
840 mutex_unlock(&pl->state_mutex);
844 EXPORT_SYMBOL_GPL(phylink_fixed_state_cb);
847 * phylink_mac_change() - notify phylink of a change in MAC state
848 * @pl: a pointer to a &struct phylink returned from phylink_create()
849 * @up: indicates whether the link is currently up.
851 * The MAC driver should call this driver when the state of its link
852 * changes (eg, link failure, new negotiation results, etc.)
854 void phylink_mac_change(struct phylink *pl, bool up)
857 pl->mac_link_dropped = true;
858 phylink_run_resolve(pl);
859 netdev_dbg(pl->netdev, "mac link %s\n", up ? "up" : "down");
861 EXPORT_SYMBOL_GPL(phylink_mac_change);
864 * phylink_start() - start a phylink instance
865 * @pl: a pointer to a &struct phylink returned from phylink_create()
867 * Start the phylink instance specified by @pl, configuring the MAC for the
868 * desired link mode(s) and negotiation style. This should be called from the
869 * network device driver's &struct net_device_ops ndo_open() method.
871 void phylink_start(struct phylink *pl)
875 netdev_info(pl->netdev, "configuring for %s/%s link mode\n",
876 phylink_an_mode_str(pl->link_an_mode),
877 phy_modes(pl->link_config.interface));
879 /* Always set the carrier off */
880 netif_carrier_off(pl->netdev);
882 /* Apply the link configuration to the MAC when starting. This allows
883 * a fixed-link to start with the correct parameters, and also
884 * ensures that we set the appropriate advertisement for Serdes links.
886 phylink_resolve_flow(pl, &pl->link_config);
887 phylink_mac_config(pl, &pl->link_config);
889 /* Restart autonegotiation if using 802.3z to ensure that the link
890 * parameters are properly negotiated. This is necessary for DSA
891 * switches using 802.3z negotiation to ensure they see our modes.
893 phylink_mac_an_restart(pl);
895 clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
896 phylink_run_resolve(pl);
898 if (pl->link_an_mode == MLO_AN_FIXED && !IS_ERR(pl->link_gpio))
899 mod_timer(&pl->link_poll, jiffies + HZ);
901 sfp_upstream_start(pl->sfp_bus);
903 phy_start(pl->phydev);
905 EXPORT_SYMBOL_GPL(phylink_start);
908 * phylink_stop() - stop a phylink instance
909 * @pl: a pointer to a &struct phylink returned from phylink_create()
911 * Stop the phylink instance specified by @pl. This should be called from the
912 * network device driver's &struct net_device_ops ndo_stop() method. The
913 * network device's carrier state should not be changed prior to calling this
916 void phylink_stop(struct phylink *pl)
921 phy_stop(pl->phydev);
923 sfp_upstream_stop(pl->sfp_bus);
924 if (pl->link_an_mode == MLO_AN_FIXED && !IS_ERR(pl->link_gpio))
925 del_timer_sync(&pl->link_poll);
927 set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
928 queue_work(system_power_efficient_wq, &pl->resolve);
929 flush_work(&pl->resolve);
931 EXPORT_SYMBOL_GPL(phylink_stop);
934 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY
935 * @pl: a pointer to a &struct phylink returned from phylink_create()
936 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters
938 * Read the wake on lan parameters from the PHY attached to the phylink
939 * instance specified by @pl. If no PHY is currently attached, report no
940 * support for wake on lan.
942 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
950 phy_ethtool_get_wol(pl->phydev, wol);
952 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol);
955 * phylink_ethtool_set_wol() - set wake on lan parameters
956 * @pl: a pointer to a &struct phylink returned from phylink_create()
957 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters
959 * Set the wake on lan parameters for the PHY attached to the phylink
960 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP
963 * Returns zero on success or negative errno code.
965 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
967 int ret = -EOPNOTSUPP;
972 ret = phy_ethtool_set_wol(pl->phydev, wol);
976 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol);
978 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b)
980 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask);
983 phylink_set_port_modes(mask);
985 linkmode_and(dst, dst, mask);
986 linkmode_or(dst, dst, b);
989 static void phylink_get_ksettings(const struct phylink_link_state *state,
990 struct ethtool_link_ksettings *kset)
992 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising);
993 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising);
994 kset->base.speed = state->speed;
995 kset->base.duplex = state->duplex;
996 kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE :
1001 * phylink_ethtool_ksettings_get() - get the current link settings
1002 * @pl: a pointer to a &struct phylink returned from phylink_create()
1003 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings
1005 * Read the current link settings for the phylink instance specified by @pl.
1006 * This will be the link settings read from the MAC, PHY or fixed link
1007 * settings depending on the current negotiation mode.
1009 int phylink_ethtool_ksettings_get(struct phylink *pl,
1010 struct ethtool_link_ksettings *kset)
1012 struct phylink_link_state link_state;
1017 phy_ethtool_ksettings_get(pl->phydev, kset);
1019 kset->base.port = pl->link_port;
1022 linkmode_copy(kset->link_modes.supported, pl->supported);
1024 switch (pl->link_an_mode) {
1026 /* We are using fixed settings. Report these as the
1027 * current link settings - and note that these also
1028 * represent the supported speeds/duplex/pause modes.
1030 phylink_get_fixed_state(pl, &link_state);
1031 phylink_get_ksettings(&link_state, kset);
1035 /* If there is a phy attached, then use the reported
1036 * settings from the phy with no modification.
1041 phylink_get_mac_state(pl, &link_state);
1043 /* The MAC is reporting the link results from its own PCS
1044 * layer via in-band status. Report these as the current
1047 phylink_get_ksettings(&link_state, kset);
1053 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get);
1056 * phylink_ethtool_ksettings_set() - set the link settings
1057 * @pl: a pointer to a &struct phylink returned from phylink_create()
1058 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes
1060 int phylink_ethtool_ksettings_set(struct phylink *pl,
1061 const struct ethtool_link_ksettings *kset)
1063 struct ethtool_link_ksettings our_kset;
1064 struct phylink_link_state config;
1069 if (kset->base.autoneg != AUTONEG_DISABLE &&
1070 kset->base.autoneg != AUTONEG_ENABLE)
1073 config = pl->link_config;
1075 /* Mask out unsupported advertisements */
1076 linkmode_and(config.advertising, kset->link_modes.advertising,
1079 /* FIXME: should we reject autoneg if phy/mac does not support it? */
1080 if (kset->base.autoneg == AUTONEG_DISABLE) {
1081 const struct phy_setting *s;
1083 /* Autonegotiation disabled, select a suitable speed and
1086 s = phy_lookup_setting(kset->base.speed, kset->base.duplex,
1087 pl->supported, false);
1091 /* If we have a fixed link (as specified by firmware), refuse
1092 * to change link parameters.
1094 if (pl->link_an_mode == MLO_AN_FIXED &&
1095 (s->speed != pl->link_config.speed ||
1096 s->duplex != pl->link_config.duplex))
1099 config.speed = s->speed;
1100 config.duplex = s->duplex;
1101 config.an_enabled = false;
1103 __clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising);
1105 /* If we have a fixed link, refuse to enable autonegotiation */
1106 if (pl->link_an_mode == MLO_AN_FIXED)
1109 config.speed = SPEED_UNKNOWN;
1110 config.duplex = DUPLEX_UNKNOWN;
1111 config.an_enabled = true;
1113 __set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising);
1116 if (phylink_validate(pl, pl->supported, &config))
1119 /* If autonegotiation is enabled, we must have an advertisement */
1120 if (config.an_enabled && phylink_is_empty_linkmode(config.advertising))
1124 linkmode_copy(our_kset.link_modes.advertising, config.advertising);
1125 our_kset.base.speed = config.speed;
1126 our_kset.base.duplex = config.duplex;
1128 /* If we have a PHY, configure the phy */
1130 ret = phy_ethtool_ksettings_set(pl->phydev, &our_kset);
1135 mutex_lock(&pl->state_mutex);
1136 /* Configure the MAC to match the new settings */
1137 linkmode_copy(pl->link_config.advertising, our_kset.link_modes.advertising);
1138 pl->link_config.interface = config.interface;
1139 pl->link_config.speed = our_kset.base.speed;
1140 pl->link_config.duplex = our_kset.base.duplex;
1141 pl->link_config.an_enabled = our_kset.base.autoneg != AUTONEG_DISABLE;
1143 if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) {
1144 phylink_mac_config(pl, &pl->link_config);
1145 phylink_mac_an_restart(pl);
1147 mutex_unlock(&pl->state_mutex);
1151 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set);
1154 * phylink_ethtool_nway_reset() - restart negotiation
1155 * @pl: a pointer to a &struct phylink returned from phylink_create()
1157 * Restart negotiation for the phylink instance specified by @pl. This will
1158 * cause any attached phy to restart negotiation with the link partner, and
1159 * if the MAC is in a BaseX mode, the MAC will also be requested to restart
1162 * Returns zero on success, or negative error code.
1164 int phylink_ethtool_nway_reset(struct phylink *pl)
1171 ret = phy_restart_aneg(pl->phydev);
1172 phylink_mac_an_restart(pl);
1176 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset);
1179 * phylink_ethtool_get_pauseparam() - get the current pause parameters
1180 * @pl: a pointer to a &struct phylink returned from phylink_create()
1181 * @pause: a pointer to a &struct ethtool_pauseparam
1183 void phylink_ethtool_get_pauseparam(struct phylink *pl,
1184 struct ethtool_pauseparam *pause)
1188 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN);
1189 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX);
1190 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX);
1192 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam);
1195 * phylink_ethtool_set_pauseparam() - set the current pause parameters
1196 * @pl: a pointer to a &struct phylink returned from phylink_create()
1197 * @pause: a pointer to a &struct ethtool_pauseparam
1199 int phylink_ethtool_set_pauseparam(struct phylink *pl,
1200 struct ethtool_pauseparam *pause)
1202 struct phylink_link_state *config = &pl->link_config;
1206 if (!phylink_test(pl->supported, Pause) &&
1207 !phylink_test(pl->supported, Asym_Pause))
1210 if (!phylink_test(pl->supported, Asym_Pause) &&
1211 !pause->autoneg && pause->rx_pause != pause->tx_pause)
1214 config->pause &= ~(MLO_PAUSE_AN | MLO_PAUSE_TXRX_MASK);
1217 config->pause |= MLO_PAUSE_AN;
1218 if (pause->rx_pause)
1219 config->pause |= MLO_PAUSE_RX;
1220 if (pause->tx_pause)
1221 config->pause |= MLO_PAUSE_TX;
1223 if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) {
1224 switch (pl->link_an_mode) {
1226 /* Silently mark the carrier down, and then trigger a resolve */
1227 netif_carrier_off(pl->netdev);
1228 phylink_run_resolve(pl);
1232 /* Should we allow fixed links to change against the config? */
1233 phylink_resolve_flow(pl, config);
1234 phylink_mac_config(pl, config);
1238 phylink_mac_config(pl, config);
1239 phylink_mac_an_restart(pl);
1246 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam);
1249 * phylink_ethtool_get_eee_err() - read the energy efficient ethernet error
1251 * @pl: a pointer to a &struct phylink returned from phylink_create().
1253 * Read the Energy Efficient Ethernet error counter from the PHY associated
1254 * with the phylink instance specified by @pl.
1256 * Returns positive error counter value, or negative error code.
1258 int phylink_get_eee_err(struct phylink *pl)
1265 ret = phy_get_eee_err(pl->phydev);
1269 EXPORT_SYMBOL_GPL(phylink_get_eee_err);
1272 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters
1273 * @pl: a pointer to a &struct phylink returned from phylink_create()
1274 * @eee: a pointer to a &struct ethtool_eee for the read parameters
1276 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee)
1278 int ret = -EOPNOTSUPP;
1283 ret = phy_ethtool_get_eee(pl->phydev, eee);
1287 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee);
1290 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters
1291 * @pl: a pointer to a &struct phylink returned from phylink_create()
1292 * @eee: a pointer to a &struct ethtool_eee for the desired parameters
1294 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee)
1296 int ret = -EOPNOTSUPP;
1301 ret = phy_ethtool_set_eee(pl->phydev, eee);
1305 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee);
1307 /* This emulates MII registers for a fixed-mode phy operating as per the
1308 * passed in state. "aneg" defines if we report negotiation is possible.
1310 * FIXME: should deal with negotiation state too.
1312 static int phylink_mii_emul_read(struct net_device *ndev, unsigned int reg,
1313 struct phylink_link_state *state, bool aneg)
1315 struct fixed_phy_status fs;
1318 fs.link = state->link;
1319 fs.speed = state->speed;
1320 fs.duplex = state->duplex;
1321 fs.pause = state->pause & MLO_PAUSE_SYM;
1322 fs.asym_pause = state->pause & MLO_PAUSE_ASYM;
1324 val = swphy_read_reg(reg, &fs);
1325 if (reg == MII_BMSR) {
1326 if (!state->an_complete)
1327 val &= ~BMSR_ANEGCOMPLETE;
1329 val &= ~BMSR_ANEGCAPABLE;
1334 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id,
1337 struct phy_device *phydev = pl->phydev;
1340 if (mdio_phy_id_is_c45(phy_id)) {
1341 prtad = mdio_phy_id_prtad(phy_id);
1342 devad = mdio_phy_id_devad(phy_id);
1343 devad = MII_ADDR_C45 | devad << 16 | reg;
1344 } else if (phydev->is_c45) {
1350 devad = __ffs(phydev->c45_ids.devices_in_package);
1354 if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN))
1356 devad = MDIO_MMD_AN;
1357 if (reg == MII_ADVERTISE)
1358 reg = MDIO_AN_ADVERTISE;
1366 devad = MII_ADDR_C45 | devad << 16 | reg;
1371 return mdiobus_read(pl->phydev->mdio.bus, prtad, devad);
1374 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id,
1375 unsigned int reg, unsigned int val)
1377 struct phy_device *phydev = pl->phydev;
1380 if (mdio_phy_id_is_c45(phy_id)) {
1381 prtad = mdio_phy_id_prtad(phy_id);
1382 devad = mdio_phy_id_devad(phy_id);
1383 devad = MII_ADDR_C45 | devad << 16 | reg;
1384 } else if (phydev->is_c45) {
1390 devad = __ffs(phydev->c45_ids.devices_in_package);
1394 if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN))
1396 devad = MDIO_MMD_AN;
1397 if (reg == MII_ADVERTISE)
1398 reg = MDIO_AN_ADVERTISE;
1406 devad = MII_ADDR_C45 | devad << 16 | reg;
1412 return mdiobus_write(phydev->mdio.bus, prtad, devad, val);
1415 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id,
1418 struct phylink_link_state state;
1421 switch (pl->link_an_mode) {
1424 phylink_get_fixed_state(pl, &state);
1425 val = phylink_mii_emul_read(pl->netdev, reg, &state,
1435 val = phylink_get_mac_state(pl, &state);
1439 val = phylink_mii_emul_read(pl->netdev, reg, &state,
1445 return val & 0xffff;
1448 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id,
1449 unsigned int reg, unsigned int val)
1451 switch (pl->link_an_mode) {
1466 * phylink_mii_ioctl() - generic mii ioctl interface
1467 * @pl: a pointer to a &struct phylink returned from phylink_create()
1468 * @ifr: a pointer to a &struct ifreq for socket ioctls
1469 * @cmd: ioctl cmd to execute
1471 * Perform the specified MII ioctl on the PHY attached to the phylink instance
1472 * specified by @pl. If no PHY is attached, emulate the presence of the PHY.
1474 * Returns: zero on success or negative error code.
1477 * read register from the current PHY.
1479 * read register from the specified PHY.
1481 * set a register on the specified PHY.
1483 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd)
1485 struct mii_ioctl_data *mii = if_mii(ifr);
1491 /* PHYs only exist for MLO_AN_PHY and SGMII */
1494 mii->phy_id = pl->phydev->mdio.addr;
1498 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num);
1506 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num,
1511 ret = phy_mii_ioctl(pl->phydev, ifr, cmd);
1521 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num);
1529 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num,
1541 EXPORT_SYMBOL_GPL(phylink_mii_ioctl);
1543 static int phylink_sfp_module_insert(void *upstream,
1544 const struct sfp_eeprom_id *id)
1546 struct phylink *pl = upstream;
1547 __ETHTOOL_DECLARE_LINK_MODE_MASK(support) = { 0, };
1548 struct phylink_link_state config;
1549 phy_interface_t iface;
1556 sfp_parse_support(pl->sfp_bus, id, support);
1557 port = sfp_parse_port(pl->sfp_bus, id, support);
1559 memset(&config, 0, sizeof(config));
1560 linkmode_copy(config.advertising, support);
1561 config.interface = PHY_INTERFACE_MODE_NA;
1562 config.speed = SPEED_UNKNOWN;
1563 config.duplex = DUPLEX_UNKNOWN;
1564 config.pause = MLO_PAUSE_AN;
1565 config.an_enabled = pl->link_config.an_enabled;
1567 /* Ignore errors if we're expecting a PHY to attach later */
1568 ret = phylink_validate(pl, support, &config);
1570 netdev_err(pl->netdev, "validation with support %*pb failed: %d\n",
1571 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
1575 iface = sfp_select_interface(pl->sfp_bus, id, config.advertising);
1576 if (iface == PHY_INTERFACE_MODE_NA) {
1577 netdev_err(pl->netdev,
1578 "selection of interface failed, advertisement %*pb\n",
1579 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising);
1583 config.interface = iface;
1584 ret = phylink_validate(pl, support, &config);
1586 netdev_err(pl->netdev, "validation of %s/%s with support %*pb failed: %d\n",
1587 phylink_an_mode_str(MLO_AN_INBAND),
1588 phy_modes(config.interface),
1589 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
1593 netdev_dbg(pl->netdev, "requesting link mode %s/%s with support %*pb\n",
1594 phylink_an_mode_str(MLO_AN_INBAND),
1595 phy_modes(config.interface),
1596 __ETHTOOL_LINK_MODE_MASK_NBITS, support);
1598 if (phy_interface_mode_is_8023z(iface) && pl->phydev)
1601 changed = !bitmap_equal(pl->supported, support,
1602 __ETHTOOL_LINK_MODE_MASK_NBITS);
1604 linkmode_copy(pl->supported, support);
1605 linkmode_copy(pl->link_config.advertising, config.advertising);
1608 if (pl->link_an_mode != MLO_AN_INBAND ||
1609 pl->link_config.interface != config.interface) {
1610 pl->link_config.interface = config.interface;
1611 pl->link_an_mode = MLO_AN_INBAND;
1615 netdev_info(pl->netdev, "switched to %s/%s link mode\n",
1616 phylink_an_mode_str(MLO_AN_INBAND),
1617 phy_modes(config.interface));
1620 pl->link_port = port;
1622 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED,
1623 &pl->phylink_disable_state))
1624 phylink_mac_config(pl, &pl->link_config);
1629 static void phylink_sfp_link_down(void *upstream)
1631 struct phylink *pl = upstream;
1635 set_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state);
1636 queue_work(system_power_efficient_wq, &pl->resolve);
1637 flush_work(&pl->resolve);
1640 static void phylink_sfp_link_up(void *upstream)
1642 struct phylink *pl = upstream;
1646 clear_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state);
1647 phylink_run_resolve(pl);
1650 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy)
1652 struct phylink *pl = upstream;
1654 return __phylink_connect_phy(upstream, phy, pl->link_config.interface);
1657 static void phylink_sfp_disconnect_phy(void *upstream)
1659 phylink_disconnect_phy(upstream);
1662 static const struct sfp_upstream_ops sfp_phylink_ops = {
1663 .module_insert = phylink_sfp_module_insert,
1664 .link_up = phylink_sfp_link_up,
1665 .link_down = phylink_sfp_link_down,
1666 .connect_phy = phylink_sfp_connect_phy,
1667 .disconnect_phy = phylink_sfp_disconnect_phy,
1670 /* Helpers for MAC drivers */
1673 * phylink_helper_basex_speed() - 1000BaseX/2500BaseX helper
1674 * @state: a pointer to a &struct phylink_link_state
1676 * Inspect the interface mode, advertising mask or forced speed and
1677 * decide whether to run at 2.5Gbit or 1Gbit appropriately, switching
1678 * the interface mode to suit. @state->interface is appropriately
1679 * updated, and the advertising mask has the "other" baseX_Full flag
1682 void phylink_helper_basex_speed(struct phylink_link_state *state)
1684 if (phy_interface_mode_is_8023z(state->interface)) {
1685 bool want_2500 = state->an_enabled ?
1686 phylink_test(state->advertising, 2500baseX_Full) :
1687 state->speed == SPEED_2500;
1690 phylink_clear(state->advertising, 1000baseX_Full);
1691 state->interface = PHY_INTERFACE_MODE_2500BASEX;
1693 phylink_clear(state->advertising, 2500baseX_Full);
1694 state->interface = PHY_INTERFACE_MODE_1000BASEX;
1698 EXPORT_SYMBOL_GPL(phylink_helper_basex_speed);
1700 MODULE_LICENSE("GPL");