1 // SPDX-License-Identifier: GPL-2.0
3 * phylink models the MAC to optional PHY connection, supporting
4 * technologies such as SFP cages where the PHY is hot-pluggable.
6 * Copyright (C) 2015 Russell King
8 #include <linux/ethtool.h>
9 #include <linux/export.h>
10 #include <linux/gpio/consumer.h>
11 #include <linux/netdevice.h>
13 #include <linux/of_mdio.h>
14 #include <linux/phy.h>
15 #include <linux/phy_fixed.h>
16 #include <linux/phylink.h>
17 #include <linux/rtnetlink.h>
18 #include <linux/spinlock.h>
19 #include <linux/timer.h>
20 #include <linux/workqueue.h>
25 #define SUPPORTED_INTERFACES \
26 (SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \
27 SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane)
28 #define ADVERTISED_INTERFACES \
29 (ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \
30 ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane)
33 PHYLINK_DISABLE_STOPPED,
38 * struct phylink - internal data type for phylink
42 struct net_device *netdev;
43 const struct phylink_mac_ops *mac_ops;
44 const struct phylink_pcs_ops *pcs_ops;
45 struct phylink_config *config;
46 struct phylink_pcs *pcs;
48 unsigned int old_link_state:1;
50 unsigned long phylink_disable_state; /* bitmask of disables */
51 struct phy_device *phydev;
52 phy_interface_t link_interface; /* PHY_INTERFACE_xxx */
53 u8 cfg_link_an_mode; /* MLO_AN_xxx */
55 u8 link_port; /* The current non-phy ethtool port */
56 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
58 /* The link configuration settings */
59 struct phylink_link_state link_config;
61 /* The current settings */
62 phy_interface_t cur_interface;
64 struct gpio_desc *link_gpio;
65 unsigned int link_irq;
66 struct timer_list link_poll;
67 void (*get_fixed_state)(struct net_device *dev,
68 struct phylink_link_state *s);
70 struct mutex state_mutex;
71 struct phylink_link_state phy_state;
72 struct work_struct resolve;
74 bool mac_link_dropped;
76 struct sfp_bus *sfp_bus;
77 bool sfp_may_have_phy;
78 __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support);
82 #define phylink_printk(level, pl, fmt, ...) \
84 if ((pl)->config->type == PHYLINK_NETDEV) \
85 netdev_printk(level, (pl)->netdev, fmt, ##__VA_ARGS__); \
86 else if ((pl)->config->type == PHYLINK_DEV) \
87 dev_printk(level, (pl)->dev, fmt, ##__VA_ARGS__); \
90 #define phylink_err(pl, fmt, ...) \
91 phylink_printk(KERN_ERR, pl, fmt, ##__VA_ARGS__)
92 #define phylink_warn(pl, fmt, ...) \
93 phylink_printk(KERN_WARNING, pl, fmt, ##__VA_ARGS__)
94 #define phylink_info(pl, fmt, ...) \
95 phylink_printk(KERN_INFO, pl, fmt, ##__VA_ARGS__)
96 #if defined(CONFIG_DYNAMIC_DEBUG)
97 #define phylink_dbg(pl, fmt, ...) \
99 if ((pl)->config->type == PHYLINK_NETDEV) \
100 netdev_dbg((pl)->netdev, fmt, ##__VA_ARGS__); \
101 else if ((pl)->config->type == PHYLINK_DEV) \
102 dev_dbg((pl)->dev, fmt, ##__VA_ARGS__); \
105 #define phylink_dbg(pl, fmt, ...) \
106 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__)
108 #define phylink_dbg(pl, fmt, ...) \
111 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__); \
116 * phylink_set_port_modes() - set the port type modes in the ethtool mask
117 * @mask: ethtool link mode mask
119 * Sets all the port type modes in the ethtool mask. MAC drivers should
120 * use this in their 'validate' callback.
122 void phylink_set_port_modes(unsigned long *mask)
124 phylink_set(mask, TP);
125 phylink_set(mask, AUI);
126 phylink_set(mask, MII);
127 phylink_set(mask, FIBRE);
128 phylink_set(mask, BNC);
129 phylink_set(mask, Backplane);
131 EXPORT_SYMBOL_GPL(phylink_set_port_modes);
133 static int phylink_is_empty_linkmode(const unsigned long *linkmode)
135 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, };
137 phylink_set_port_modes(tmp);
138 phylink_set(tmp, Autoneg);
139 phylink_set(tmp, Pause);
140 phylink_set(tmp, Asym_Pause);
142 return linkmode_subset(linkmode, tmp);
145 static const char *phylink_an_mode_str(unsigned int mode)
147 static const char *modestr[] = {
148 [MLO_AN_PHY] = "phy",
149 [MLO_AN_FIXED] = "fixed",
150 [MLO_AN_INBAND] = "inband",
153 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown";
156 static int phylink_validate(struct phylink *pl, unsigned long *supported,
157 struct phylink_link_state *state)
159 pl->mac_ops->validate(pl->config, supported, state);
161 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0;
164 static int phylink_parse_fixedlink(struct phylink *pl,
165 struct fwnode_handle *fwnode)
167 struct fwnode_handle *fixed_node;
168 const struct phy_setting *s;
169 struct gpio_desc *desc;
173 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link");
175 ret = fwnode_property_read_u32(fixed_node, "speed", &speed);
177 pl->link_config.speed = speed;
178 pl->link_config.duplex = DUPLEX_HALF;
180 if (fwnode_property_read_bool(fixed_node, "full-duplex"))
181 pl->link_config.duplex = DUPLEX_FULL;
183 /* We treat the "pause" and "asym-pause" terminology as
184 * defining the link partner's ability. */
185 if (fwnode_property_read_bool(fixed_node, "pause"))
186 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
187 pl->link_config.lp_advertising);
188 if (fwnode_property_read_bool(fixed_node, "asym-pause"))
189 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
190 pl->link_config.lp_advertising);
193 desc = fwnode_gpiod_get_index(fixed_node, "link", 0,
197 pl->link_gpio = desc;
198 else if (desc == ERR_PTR(-EPROBE_DEFER))
201 fwnode_handle_put(fixed_node);
208 ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
210 if (ret != ARRAY_SIZE(prop)) {
211 phylink_err(pl, "broken fixed-link?\n");
215 ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
216 prop, ARRAY_SIZE(prop));
218 pl->link_config.duplex = prop[1] ?
219 DUPLEX_FULL : DUPLEX_HALF;
220 pl->link_config.speed = prop[2];
222 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
223 pl->link_config.lp_advertising);
225 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
226 pl->link_config.lp_advertising);
230 if (pl->link_config.speed > SPEED_1000 &&
231 pl->link_config.duplex != DUPLEX_FULL)
232 phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n",
233 pl->link_config.speed);
235 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
236 linkmode_copy(pl->link_config.advertising, pl->supported);
237 phylink_validate(pl, pl->supported, &pl->link_config);
239 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex,
240 pl->supported, true);
241 linkmode_zero(pl->supported);
242 phylink_set(pl->supported, MII);
243 phylink_set(pl->supported, Pause);
244 phylink_set(pl->supported, Asym_Pause);
245 phylink_set(pl->supported, Autoneg);
247 __set_bit(s->bit, pl->supported);
248 __set_bit(s->bit, pl->link_config.lp_advertising);
250 phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n",
251 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half",
252 pl->link_config.speed);
255 linkmode_and(pl->link_config.advertising, pl->link_config.advertising,
258 pl->link_config.link = 1;
259 pl->link_config.an_complete = 1;
264 static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode)
266 struct fwnode_handle *dn;
269 dn = fwnode_get_named_child_node(fwnode, "fixed-link");
270 if (dn || fwnode_property_present(fwnode, "fixed-link"))
271 pl->cfg_link_an_mode = MLO_AN_FIXED;
272 fwnode_handle_put(dn);
274 if (fwnode_property_read_string(fwnode, "managed", &managed) == 0 &&
275 strcmp(managed, "in-band-status") == 0) {
276 if (pl->cfg_link_an_mode == MLO_AN_FIXED) {
278 "can't use both fixed-link and in-band-status\n");
282 linkmode_zero(pl->supported);
283 phylink_set(pl->supported, MII);
284 phylink_set(pl->supported, Autoneg);
285 phylink_set(pl->supported, Asym_Pause);
286 phylink_set(pl->supported, Pause);
287 pl->link_config.an_enabled = true;
288 pl->cfg_link_an_mode = MLO_AN_INBAND;
290 switch (pl->link_config.interface) {
291 case PHY_INTERFACE_MODE_SGMII:
292 case PHY_INTERFACE_MODE_QSGMII:
293 phylink_set(pl->supported, 10baseT_Half);
294 phylink_set(pl->supported, 10baseT_Full);
295 phylink_set(pl->supported, 100baseT_Half);
296 phylink_set(pl->supported, 100baseT_Full);
297 phylink_set(pl->supported, 1000baseT_Half);
298 phylink_set(pl->supported, 1000baseT_Full);
301 case PHY_INTERFACE_MODE_1000BASEX:
302 phylink_set(pl->supported, 1000baseX_Full);
305 case PHY_INTERFACE_MODE_2500BASEX:
306 phylink_set(pl->supported, 2500baseX_Full);
309 case PHY_INTERFACE_MODE_USXGMII:
310 case PHY_INTERFACE_MODE_10GKR:
311 case PHY_INTERFACE_MODE_10GBASER:
312 phylink_set(pl->supported, 10baseT_Half);
313 phylink_set(pl->supported, 10baseT_Full);
314 phylink_set(pl->supported, 100baseT_Half);
315 phylink_set(pl->supported, 100baseT_Full);
316 phylink_set(pl->supported, 1000baseT_Half);
317 phylink_set(pl->supported, 1000baseT_Full);
318 phylink_set(pl->supported, 1000baseX_Full);
319 phylink_set(pl->supported, 1000baseKX_Full);
320 phylink_set(pl->supported, 2500baseT_Full);
321 phylink_set(pl->supported, 2500baseX_Full);
322 phylink_set(pl->supported, 5000baseT_Full);
323 phylink_set(pl->supported, 10000baseT_Full);
324 phylink_set(pl->supported, 10000baseKR_Full);
325 phylink_set(pl->supported, 10000baseKX4_Full);
326 phylink_set(pl->supported, 10000baseCR_Full);
327 phylink_set(pl->supported, 10000baseSR_Full);
328 phylink_set(pl->supported, 10000baseLR_Full);
329 phylink_set(pl->supported, 10000baseLRM_Full);
330 phylink_set(pl->supported, 10000baseER_Full);
333 case PHY_INTERFACE_MODE_XLGMII:
334 phylink_set(pl->supported, 25000baseCR_Full);
335 phylink_set(pl->supported, 25000baseKR_Full);
336 phylink_set(pl->supported, 25000baseSR_Full);
337 phylink_set(pl->supported, 40000baseKR4_Full);
338 phylink_set(pl->supported, 40000baseCR4_Full);
339 phylink_set(pl->supported, 40000baseSR4_Full);
340 phylink_set(pl->supported, 40000baseLR4_Full);
341 phylink_set(pl->supported, 50000baseCR2_Full);
342 phylink_set(pl->supported, 50000baseKR2_Full);
343 phylink_set(pl->supported, 50000baseSR2_Full);
344 phylink_set(pl->supported, 50000baseKR_Full);
345 phylink_set(pl->supported, 50000baseSR_Full);
346 phylink_set(pl->supported, 50000baseCR_Full);
347 phylink_set(pl->supported, 50000baseLR_ER_FR_Full);
348 phylink_set(pl->supported, 50000baseDR_Full);
349 phylink_set(pl->supported, 100000baseKR4_Full);
350 phylink_set(pl->supported, 100000baseSR4_Full);
351 phylink_set(pl->supported, 100000baseCR4_Full);
352 phylink_set(pl->supported, 100000baseLR4_ER4_Full);
353 phylink_set(pl->supported, 100000baseKR2_Full);
354 phylink_set(pl->supported, 100000baseSR2_Full);
355 phylink_set(pl->supported, 100000baseCR2_Full);
356 phylink_set(pl->supported, 100000baseLR2_ER2_FR2_Full);
357 phylink_set(pl->supported, 100000baseDR2_Full);
362 "incorrect link mode %s for in-band status\n",
363 phy_modes(pl->link_config.interface));
367 linkmode_copy(pl->link_config.advertising, pl->supported);
369 if (phylink_validate(pl, pl->supported, &pl->link_config)) {
371 "failed to validate link configuration for in-band status\n");
375 /* Check if MAC/PCS also supports Autoneg. */
376 pl->link_config.an_enabled = phylink_test(pl->supported, Autoneg);
382 static void phylink_apply_manual_flow(struct phylink *pl,
383 struct phylink_link_state *state)
385 /* If autoneg is disabled, pause AN is also disabled */
386 if (!state->an_enabled)
387 state->pause &= ~MLO_PAUSE_AN;
389 /* Manual configuration of pause modes */
390 if (!(pl->link_config.pause & MLO_PAUSE_AN))
391 state->pause = pl->link_config.pause;
394 static void phylink_resolve_flow(struct phylink_link_state *state)
396 bool tx_pause, rx_pause;
398 state->pause = MLO_PAUSE_NONE;
399 if (state->duplex == DUPLEX_FULL) {
400 linkmode_resolve_pause(state->advertising,
401 state->lp_advertising,
402 &tx_pause, &rx_pause);
404 state->pause |= MLO_PAUSE_TX;
406 state->pause |= MLO_PAUSE_RX;
410 static void phylink_mac_config(struct phylink *pl,
411 const struct phylink_link_state *state)
414 "%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n",
415 __func__, phylink_an_mode_str(pl->cur_link_an_mode),
416 phy_modes(state->interface),
417 phy_speed_to_str(state->speed),
418 phy_duplex_to_str(state->duplex),
419 __ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising,
420 state->pause, state->link, state->an_enabled);
422 pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, state);
425 static void phylink_mac_pcs_an_restart(struct phylink *pl)
427 if (pl->link_config.an_enabled &&
428 phy_interface_mode_is_8023z(pl->link_config.interface) &&
429 phylink_autoneg_inband(pl->cur_link_an_mode)) {
431 pl->pcs_ops->pcs_an_restart(pl->pcs);
433 pl->mac_ops->mac_an_restart(pl->config);
437 static void phylink_major_config(struct phylink *pl, bool restart,
438 const struct phylink_link_state *state)
442 phylink_dbg(pl, "major config %s\n", phy_modes(state->interface));
444 if (pl->mac_ops->mac_prepare) {
445 err = pl->mac_ops->mac_prepare(pl->config, pl->cur_link_an_mode,
448 phylink_err(pl, "mac_prepare failed: %pe\n",
454 phylink_mac_config(pl, state);
457 err = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode,
460 !!(pl->link_config.pause &
463 phylink_err(pl, "pcs_config failed: %pe\n",
469 phylink_mac_pcs_an_restart(pl);
471 if (pl->mac_ops->mac_finish) {
472 err = pl->mac_ops->mac_finish(pl->config, pl->cur_link_an_mode,
475 phylink_err(pl, "mac_finish failed: %pe\n",
481 * Reconfigure for a change of inband advertisement.
482 * If we have a separate PCS, we only need to call its pcs_config() method,
483 * and then restart AN if it indicates something changed. Otherwise, we do
484 * the full MAC reconfiguration.
486 static int phylink_change_inband_advert(struct phylink *pl)
490 if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state))
495 phylink_mac_config(pl, &pl->link_config);
496 phylink_mac_pcs_an_restart(pl);
500 phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__,
501 phylink_an_mode_str(pl->cur_link_an_mode),
502 phy_modes(pl->link_config.interface),
503 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising,
504 pl->link_config.pause);
506 /* Modern PCS-based method; update the advert at the PCS, and
507 * restart negotiation if the pcs_config() helper indicates that
508 * the programmed advertisement has changed.
510 ret = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode,
511 pl->link_config.interface,
512 pl->link_config.advertising,
513 !!(pl->link_config.pause & MLO_PAUSE_AN));
518 phylink_mac_pcs_an_restart(pl);
523 static void phylink_mac_pcs_get_state(struct phylink *pl,
524 struct phylink_link_state *state)
526 linkmode_copy(state->advertising, pl->link_config.advertising);
527 linkmode_zero(state->lp_advertising);
528 state->interface = pl->link_config.interface;
529 state->an_enabled = pl->link_config.an_enabled;
530 state->speed = SPEED_UNKNOWN;
531 state->duplex = DUPLEX_UNKNOWN;
532 state->pause = MLO_PAUSE_NONE;
533 state->an_complete = 0;
537 pl->pcs_ops->pcs_get_state(pl->pcs, state);
538 else if (pl->mac_ops->mac_pcs_get_state)
539 pl->mac_ops->mac_pcs_get_state(pl->config, state);
544 /* The fixed state is... fixed except for the link state,
545 * which may be determined by a GPIO or a callback.
547 static void phylink_get_fixed_state(struct phylink *pl,
548 struct phylink_link_state *state)
550 *state = pl->link_config;
551 if (pl->config->get_fixed_state)
552 pl->config->get_fixed_state(pl->config, state);
553 else if (pl->link_gpio)
554 state->link = !!gpiod_get_value_cansleep(pl->link_gpio);
556 phylink_resolve_flow(state);
559 static void phylink_mac_initial_config(struct phylink *pl, bool force_restart)
561 struct phylink_link_state link_state;
563 switch (pl->cur_link_an_mode) {
565 link_state = pl->phy_state;
569 phylink_get_fixed_state(pl, &link_state);
573 link_state = pl->link_config;
574 if (link_state.interface == PHY_INTERFACE_MODE_SGMII)
575 link_state.pause = MLO_PAUSE_NONE;
578 default: /* can't happen */
582 link_state.link = false;
584 phylink_apply_manual_flow(pl, &link_state);
585 phylink_major_config(pl, force_restart, &link_state);
588 static const char *phylink_pause_to_str(int pause)
590 switch (pause & MLO_PAUSE_TXRX_MASK) {
591 case MLO_PAUSE_TX | MLO_PAUSE_RX:
602 static void phylink_link_up(struct phylink *pl,
603 struct phylink_link_state link_state)
605 struct net_device *ndev = pl->netdev;
607 pl->cur_interface = link_state.interface;
609 if (pl->pcs_ops && pl->pcs_ops->pcs_link_up)
610 pl->pcs_ops->pcs_link_up(pl->pcs, pl->cur_link_an_mode,
612 link_state.speed, link_state.duplex);
614 pl->mac_ops->mac_link_up(pl->config, pl->phydev,
615 pl->cur_link_an_mode, pl->cur_interface,
616 link_state.speed, link_state.duplex,
617 !!(link_state.pause & MLO_PAUSE_TX),
618 !!(link_state.pause & MLO_PAUSE_RX));
621 netif_carrier_on(ndev);
624 "Link is Up - %s/%s - flow control %s\n",
625 phy_speed_to_str(link_state.speed),
626 phy_duplex_to_str(link_state.duplex),
627 phylink_pause_to_str(link_state.pause));
630 static void phylink_link_down(struct phylink *pl)
632 struct net_device *ndev = pl->netdev;
635 netif_carrier_off(ndev);
636 pl->mac_ops->mac_link_down(pl->config, pl->cur_link_an_mode,
638 phylink_info(pl, "Link is Down\n");
641 static void phylink_resolve(struct work_struct *w)
643 struct phylink *pl = container_of(w, struct phylink, resolve);
644 struct phylink_link_state link_state;
645 struct net_device *ndev = pl->netdev;
646 bool mac_config = false;
647 bool retrigger = false;
650 mutex_lock(&pl->state_mutex);
652 cur_link_state = netif_carrier_ok(ndev);
654 cur_link_state = pl->old_link_state;
656 if (pl->phylink_disable_state) {
657 pl->mac_link_dropped = false;
658 link_state.link = false;
659 } else if (pl->mac_link_dropped) {
660 link_state.link = false;
663 switch (pl->cur_link_an_mode) {
665 link_state = pl->phy_state;
666 phylink_apply_manual_flow(pl, &link_state);
667 mac_config = link_state.link;
671 phylink_get_fixed_state(pl, &link_state);
672 mac_config = link_state.link;
676 phylink_mac_pcs_get_state(pl, &link_state);
678 /* The PCS may have a latching link-fail indicator.
679 * If the link was up, bring the link down and
680 * re-trigger the resolve. Otherwise, re-read the
681 * PCS state to get the current status of the link.
683 if (!link_state.link) {
687 phylink_mac_pcs_get_state(pl,
691 /* If we have a phy, the "up" state is the union of
692 * both the PHY and the MAC */
694 link_state.link &= pl->phy_state.link;
696 /* Only update if the PHY link is up */
697 if (pl->phydev && pl->phy_state.link) {
698 /* If the interface has changed, force a
699 * link down event if the link isn't already
700 * down, and re-resolve.
702 if (link_state.interface !=
703 pl->phy_state.interface) {
705 link_state.link = false;
707 link_state.interface = pl->phy_state.interface;
709 /* If we have a PHY, we need to update with
710 * the PHY flow control bits. */
711 link_state.pause = pl->phy_state.pause;
714 phylink_apply_manual_flow(pl, &link_state);
720 if (link_state.interface != pl->link_config.interface) {
721 /* The interface has changed, force the link down and
724 if (cur_link_state) {
725 phylink_link_down(pl);
726 cur_link_state = false;
728 phylink_major_config(pl, false, &link_state);
729 pl->link_config.interface = link_state.interface;
730 } else if (!pl->pcs_ops) {
731 /* The interface remains unchanged, only the speed,
732 * duplex or pause settings have changed. Call the
733 * old mac_config() method to configure the MAC/PCS
734 * only if we do not have a PCS installed (an
737 phylink_mac_config(pl, &link_state);
741 if (link_state.link != cur_link_state) {
742 pl->old_link_state = link_state.link;
743 if (!link_state.link)
744 phylink_link_down(pl);
746 phylink_link_up(pl, link_state);
748 if (!link_state.link && retrigger) {
749 pl->mac_link_dropped = false;
750 queue_work(system_power_efficient_wq, &pl->resolve);
752 mutex_unlock(&pl->state_mutex);
755 static void phylink_run_resolve(struct phylink *pl)
757 if (!pl->phylink_disable_state)
758 queue_work(system_power_efficient_wq, &pl->resolve);
761 static void phylink_run_resolve_and_disable(struct phylink *pl, int bit)
763 unsigned long state = pl->phylink_disable_state;
765 set_bit(bit, &pl->phylink_disable_state);
767 queue_work(system_power_efficient_wq, &pl->resolve);
768 flush_work(&pl->resolve);
772 static void phylink_fixed_poll(struct timer_list *t)
774 struct phylink *pl = container_of(t, struct phylink, link_poll);
776 mod_timer(t, jiffies + HZ);
778 phylink_run_resolve(pl);
781 static const struct sfp_upstream_ops sfp_phylink_ops;
783 static int phylink_register_sfp(struct phylink *pl,
784 struct fwnode_handle *fwnode)
792 bus = sfp_bus_find_fwnode(fwnode);
795 phylink_err(pl, "unable to attach SFP bus: %d\n", ret);
801 ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops);
808 * phylink_create() - create a phylink instance
809 * @config: a pointer to the target &struct phylink_config
810 * @fwnode: a pointer to a &struct fwnode_handle describing the network
812 * @iface: the desired link mode defined by &typedef phy_interface_t
813 * @mac_ops: a pointer to a &struct phylink_mac_ops for the MAC.
815 * Create a new phylink instance, and parse the link parameters found in @np.
816 * This will parse in-band modes, fixed-link or SFP configuration.
818 * Note: the rtnl lock must not be held when calling this function.
820 * Returns a pointer to a &struct phylink, or an error-pointer value. Users
821 * must use IS_ERR() to check for errors from this function.
823 struct phylink *phylink_create(struct phylink_config *config,
824 struct fwnode_handle *fwnode,
825 phy_interface_t iface,
826 const struct phylink_mac_ops *mac_ops)
831 pl = kzalloc(sizeof(*pl), GFP_KERNEL);
833 return ERR_PTR(-ENOMEM);
835 mutex_init(&pl->state_mutex);
836 INIT_WORK(&pl->resolve, phylink_resolve);
839 if (config->type == PHYLINK_NETDEV) {
840 pl->netdev = to_net_dev(config->dev);
841 } else if (config->type == PHYLINK_DEV) {
842 pl->dev = config->dev;
845 return ERR_PTR(-EINVAL);
848 pl->phy_state.interface = iface;
849 pl->link_interface = iface;
850 if (iface == PHY_INTERFACE_MODE_MOCA)
851 pl->link_port = PORT_BNC;
853 pl->link_port = PORT_MII;
854 pl->link_config.interface = iface;
855 pl->link_config.pause = MLO_PAUSE_AN;
856 pl->link_config.speed = SPEED_UNKNOWN;
857 pl->link_config.duplex = DUPLEX_UNKNOWN;
858 pl->link_config.an_enabled = true;
859 pl->mac_ops = mac_ops;
860 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
861 timer_setup(&pl->link_poll, phylink_fixed_poll, 0);
863 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
864 linkmode_copy(pl->link_config.advertising, pl->supported);
865 phylink_validate(pl, pl->supported, &pl->link_config);
867 ret = phylink_parse_mode(pl, fwnode);
873 if (pl->cfg_link_an_mode == MLO_AN_FIXED) {
874 ret = phylink_parse_fixedlink(pl, fwnode);
881 pl->cur_link_an_mode = pl->cfg_link_an_mode;
883 ret = phylink_register_sfp(pl, fwnode);
891 EXPORT_SYMBOL_GPL(phylink_create);
894 * phylink_set_pcs() - set the current PCS for phylink to use
895 * @pl: a pointer to a &struct phylink returned from phylink_create()
896 * @pcs: a pointer to the &struct phylink_pcs
898 * Bind the MAC PCS to phylink. This may be called after phylink_create(),
899 * in mac_prepare() or mac_config() methods if it is desired to dynamically
902 * Please note that there are behavioural changes with the mac_config()
903 * callback if a PCS is present (denoting a newer setup) so removing a PCS
904 * is not supported, and if a PCS is going to be used, it must be registered
905 * by calling phylink_set_pcs() at the latest in the first mac_config() call.
907 void phylink_set_pcs(struct phylink *pl, struct phylink_pcs *pcs)
910 pl->pcs_ops = pcs->ops;
912 EXPORT_SYMBOL_GPL(phylink_set_pcs);
915 * phylink_destroy() - cleanup and destroy the phylink instance
916 * @pl: a pointer to a &struct phylink returned from phylink_create()
918 * Destroy a phylink instance. Any PHY that has been attached must have been
919 * cleaned up via phylink_disconnect_phy() prior to calling this function.
921 * Note: the rtnl lock must not be held when calling this function.
923 void phylink_destroy(struct phylink *pl)
925 sfp_bus_del_upstream(pl->sfp_bus);
927 gpiod_put(pl->link_gpio);
929 cancel_work_sync(&pl->resolve);
932 EXPORT_SYMBOL_GPL(phylink_destroy);
934 static void phylink_phy_change(struct phy_device *phydev, bool up)
936 struct phylink *pl = phydev->phylink;
937 bool tx_pause, rx_pause;
939 phy_get_pause(phydev, &tx_pause, &rx_pause);
941 mutex_lock(&pl->state_mutex);
942 pl->phy_state.speed = phydev->speed;
943 pl->phy_state.duplex = phydev->duplex;
944 pl->phy_state.pause = MLO_PAUSE_NONE;
946 pl->phy_state.pause |= MLO_PAUSE_TX;
948 pl->phy_state.pause |= MLO_PAUSE_RX;
949 pl->phy_state.interface = phydev->interface;
950 pl->phy_state.link = up;
951 mutex_unlock(&pl->state_mutex);
953 phylink_run_resolve(pl);
955 phylink_dbg(pl, "phy link %s %s/%s/%s\n", up ? "up" : "down",
956 phy_modes(phydev->interface),
957 phy_speed_to_str(phydev->speed),
958 phy_duplex_to_str(phydev->duplex));
961 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy,
962 phy_interface_t interface)
964 struct phylink_link_state config;
965 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
970 * This is the new way of dealing with flow control for PHYs,
971 * as described by Timur Tabi in commit 529ed1275263 ("net: phy:
972 * phy drivers should not set SUPPORTED_[Asym_]Pause") except
973 * using our validate call to the MAC, we rely upon the MAC
974 * clearing the bits from both supported and advertising fields.
976 phy_support_asym_pause(phy);
978 memset(&config, 0, sizeof(config));
979 linkmode_copy(supported, phy->supported);
980 linkmode_copy(config.advertising, phy->advertising);
982 /* Clause 45 PHYs switch their Serdes lane between several different
983 * modes, normally 10GBASE-R, SGMII. Some use 2500BASE-X for 2.5G
984 * speeds. We really need to know which interface modes the PHY and
985 * MAC supports to properly work out which linkmodes can be supported.
988 interface != PHY_INTERFACE_MODE_RXAUI &&
989 interface != PHY_INTERFACE_MODE_XAUI &&
990 interface != PHY_INTERFACE_MODE_USXGMII)
991 config.interface = PHY_INTERFACE_MODE_NA;
993 config.interface = interface;
995 ret = phylink_validate(pl, supported, &config);
997 phylink_warn(pl, "validation of %s with support %*pb and advertisement %*pb failed: %d\n",
998 phy_modes(config.interface),
999 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->supported,
1000 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising,
1006 phy->phy_link_change = phylink_phy_change;
1008 irq_str = phy_attached_info_irq(phy);
1010 "PHY [%s] driver [%s] (irq=%s)\n",
1011 dev_name(&phy->mdio.dev), phy->drv->name, irq_str);
1014 mutex_lock(&phy->lock);
1015 mutex_lock(&pl->state_mutex);
1017 pl->phy_state.interface = interface;
1018 pl->phy_state.pause = MLO_PAUSE_NONE;
1019 pl->phy_state.speed = SPEED_UNKNOWN;
1020 pl->phy_state.duplex = DUPLEX_UNKNOWN;
1021 linkmode_copy(pl->supported, supported);
1022 linkmode_copy(pl->link_config.advertising, config.advertising);
1024 /* Restrict the phy advertisement according to the MAC support. */
1025 linkmode_copy(phy->advertising, config.advertising);
1026 mutex_unlock(&pl->state_mutex);
1027 mutex_unlock(&phy->lock);
1030 "phy: setting supported %*pb advertising %*pb\n",
1031 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported,
1032 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising);
1034 if (phy_interrupt_is_valid(phy))
1035 phy_request_interrupt(phy);
1040 static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy,
1041 phy_interface_t interface)
1043 if (WARN_ON(pl->cfg_link_an_mode == MLO_AN_FIXED ||
1044 (pl->cfg_link_an_mode == MLO_AN_INBAND &&
1045 phy_interface_mode_is_8023z(interface))))
1051 return phy_attach_direct(pl->netdev, phy, 0, interface);
1055 * phylink_connect_phy() - connect a PHY to the phylink instance
1056 * @pl: a pointer to a &struct phylink returned from phylink_create()
1057 * @phy: a pointer to a &struct phy_device.
1059 * Connect @phy to the phylink instance specified by @pl by calling
1060 * phy_attach_direct(). Configure the @phy according to the MAC driver's
1061 * capabilities, start the PHYLIB state machine and enable any interrupts
1062 * that the PHY supports.
1064 * This updates the phylink's ethtool supported and advertising link mode
1067 * Returns 0 on success or a negative errno.
1069 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy)
1073 /* Use PHY device/driver interface */
1074 if (pl->link_interface == PHY_INTERFACE_MODE_NA) {
1075 pl->link_interface = phy->interface;
1076 pl->link_config.interface = pl->link_interface;
1079 ret = phylink_attach_phy(pl, phy, pl->link_interface);
1083 ret = phylink_bringup_phy(pl, phy, pl->link_config.interface);
1089 EXPORT_SYMBOL_GPL(phylink_connect_phy);
1092 * phylink_of_phy_connect() - connect the PHY specified in the DT mode.
1093 * @pl: a pointer to a &struct phylink returned from phylink_create()
1094 * @dn: a pointer to a &struct device_node.
1095 * @flags: PHY-specific flags to communicate to the PHY device driver
1097 * Connect the phy specified in the device node @dn to the phylink instance
1098 * specified by @pl. Actions specified in phylink_connect_phy() will be
1101 * Returns 0 on success or a negative errno.
1103 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn,
1106 struct device_node *phy_node;
1107 struct phy_device *phy_dev;
1110 /* Fixed links and 802.3z are handled without needing a PHY */
1111 if (pl->cfg_link_an_mode == MLO_AN_FIXED ||
1112 (pl->cfg_link_an_mode == MLO_AN_INBAND &&
1113 phy_interface_mode_is_8023z(pl->link_interface)))
1116 phy_node = of_parse_phandle(dn, "phy-handle", 0);
1118 phy_node = of_parse_phandle(dn, "phy", 0);
1120 phy_node = of_parse_phandle(dn, "phy-device", 0);
1123 if (pl->cfg_link_an_mode == MLO_AN_PHY)
1128 phy_dev = of_phy_find_device(phy_node);
1129 /* We're done with the phy_node handle */
1130 of_node_put(phy_node);
1134 ret = phy_attach_direct(pl->netdev, phy_dev, flags,
1135 pl->link_interface);
1139 ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface);
1141 phy_detach(phy_dev);
1145 EXPORT_SYMBOL_GPL(phylink_of_phy_connect);
1148 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink
1150 * @pl: a pointer to a &struct phylink returned from phylink_create()
1152 * Disconnect any current PHY from the phylink instance described by @pl.
1154 void phylink_disconnect_phy(struct phylink *pl)
1156 struct phy_device *phy;
1162 mutex_lock(&phy->lock);
1163 mutex_lock(&pl->state_mutex);
1165 mutex_unlock(&pl->state_mutex);
1166 mutex_unlock(&phy->lock);
1167 flush_work(&pl->resolve);
1169 phy_disconnect(phy);
1172 EXPORT_SYMBOL_GPL(phylink_disconnect_phy);
1175 * phylink_mac_change() - notify phylink of a change in MAC state
1176 * @pl: a pointer to a &struct phylink returned from phylink_create()
1177 * @up: indicates whether the link is currently up.
1179 * The MAC driver should call this driver when the state of its link
1180 * changes (eg, link failure, new negotiation results, etc.)
1182 void phylink_mac_change(struct phylink *pl, bool up)
1185 pl->mac_link_dropped = true;
1186 phylink_run_resolve(pl);
1187 phylink_dbg(pl, "mac link %s\n", up ? "up" : "down");
1189 EXPORT_SYMBOL_GPL(phylink_mac_change);
1191 static irqreturn_t phylink_link_handler(int irq, void *data)
1193 struct phylink *pl = data;
1195 phylink_run_resolve(pl);
1201 * phylink_start() - start a phylink instance
1202 * @pl: a pointer to a &struct phylink returned from phylink_create()
1204 * Start the phylink instance specified by @pl, configuring the MAC for the
1205 * desired link mode(s) and negotiation style. This should be called from the
1206 * network device driver's &struct net_device_ops ndo_open() method.
1208 void phylink_start(struct phylink *pl)
1214 phylink_info(pl, "configuring for %s/%s link mode\n",
1215 phylink_an_mode_str(pl->cur_link_an_mode),
1216 phy_modes(pl->link_config.interface));
1218 /* Always set the carrier off */
1220 netif_carrier_off(pl->netdev);
1222 /* Apply the link configuration to the MAC when starting. This allows
1223 * a fixed-link to start with the correct parameters, and also
1224 * ensures that we set the appropriate advertisement for Serdes links.
1226 * Restart autonegotiation if using 802.3z to ensure that the link
1227 * parameters are properly negotiated. This is necessary for DSA
1228 * switches using 802.3z negotiation to ensure they see our modes.
1230 phylink_mac_initial_config(pl, true);
1232 clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
1233 phylink_run_resolve(pl);
1235 if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) {
1236 int irq = gpiod_to_irq(pl->link_gpio);
1239 if (!request_irq(irq, phylink_link_handler,
1240 IRQF_TRIGGER_RISING |
1241 IRQF_TRIGGER_FALLING,
1251 switch (pl->cfg_link_an_mode) {
1253 poll |= pl->config->poll_fixed_state;
1256 poll |= pl->config->pcs_poll;
1258 poll |= pl->pcs->poll;
1262 mod_timer(&pl->link_poll, jiffies + HZ);
1264 phy_start(pl->phydev);
1266 sfp_upstream_start(pl->sfp_bus);
1268 EXPORT_SYMBOL_GPL(phylink_start);
1271 * phylink_stop() - stop a phylink instance
1272 * @pl: a pointer to a &struct phylink returned from phylink_create()
1274 * Stop the phylink instance specified by @pl. This should be called from the
1275 * network device driver's &struct net_device_ops ndo_stop() method. The
1276 * network device's carrier state should not be changed prior to calling this
1279 void phylink_stop(struct phylink *pl)
1284 sfp_upstream_stop(pl->sfp_bus);
1286 phy_stop(pl->phydev);
1287 del_timer_sync(&pl->link_poll);
1289 free_irq(pl->link_irq, pl);
1293 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED);
1295 EXPORT_SYMBOL_GPL(phylink_stop);
1298 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY
1299 * @pl: a pointer to a &struct phylink returned from phylink_create()
1300 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters
1302 * Read the wake on lan parameters from the PHY attached to the phylink
1303 * instance specified by @pl. If no PHY is currently attached, report no
1304 * support for wake on lan.
1306 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
1314 phy_ethtool_get_wol(pl->phydev, wol);
1316 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol);
1319 * phylink_ethtool_set_wol() - set wake on lan parameters
1320 * @pl: a pointer to a &struct phylink returned from phylink_create()
1321 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters
1323 * Set the wake on lan parameters for the PHY attached to the phylink
1324 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP
1327 * Returns zero on success or negative errno code.
1329 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
1331 int ret = -EOPNOTSUPP;
1336 ret = phy_ethtool_set_wol(pl->phydev, wol);
1340 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol);
1342 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b)
1344 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask);
1346 linkmode_zero(mask);
1347 phylink_set_port_modes(mask);
1349 linkmode_and(dst, dst, mask);
1350 linkmode_or(dst, dst, b);
1353 static void phylink_get_ksettings(const struct phylink_link_state *state,
1354 struct ethtool_link_ksettings *kset)
1356 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising);
1357 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising);
1358 kset->base.speed = state->speed;
1359 kset->base.duplex = state->duplex;
1360 kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE :
1365 * phylink_ethtool_ksettings_get() - get the current link settings
1366 * @pl: a pointer to a &struct phylink returned from phylink_create()
1367 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings
1369 * Read the current link settings for the phylink instance specified by @pl.
1370 * This will be the link settings read from the MAC, PHY or fixed link
1371 * settings depending on the current negotiation mode.
1373 int phylink_ethtool_ksettings_get(struct phylink *pl,
1374 struct ethtool_link_ksettings *kset)
1376 struct phylink_link_state link_state;
1381 phy_ethtool_ksettings_get(pl->phydev, kset);
1383 kset->base.port = pl->link_port;
1386 linkmode_copy(kset->link_modes.supported, pl->supported);
1388 switch (pl->cur_link_an_mode) {
1390 /* We are using fixed settings. Report these as the
1391 * current link settings - and note that these also
1392 * represent the supported speeds/duplex/pause modes.
1394 phylink_get_fixed_state(pl, &link_state);
1395 phylink_get_ksettings(&link_state, kset);
1399 /* If there is a phy attached, then use the reported
1400 * settings from the phy with no modification.
1405 phylink_mac_pcs_get_state(pl, &link_state);
1407 /* The MAC is reporting the link results from its own PCS
1408 * layer via in-band status. Report these as the current
1411 phylink_get_ksettings(&link_state, kset);
1417 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get);
1420 * phylink_ethtool_ksettings_set() - set the link settings
1421 * @pl: a pointer to a &struct phylink returned from phylink_create()
1422 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes
1424 int phylink_ethtool_ksettings_set(struct phylink *pl,
1425 const struct ethtool_link_ksettings *kset)
1427 __ETHTOOL_DECLARE_LINK_MODE_MASK(support);
1428 struct phylink_link_state config;
1429 const struct phy_setting *s;
1434 /* We can rely on phylib for this update; we also do not need
1435 * to update the pl->link_config settings:
1436 * - the configuration returned via ksettings_get() will come
1437 * from phylib whenever a PHY is present.
1438 * - link_config.interface will be updated by the PHY calling
1439 * back via phylink_phy_change() and a subsequent resolve.
1440 * - initial link configuration for PHY mode comes from the
1441 * last phy state updated via phylink_phy_change().
1442 * - other configuration changes (e.g. pause modes) are
1443 * performed directly via phylib.
1444 * - if in in-band mode with a PHY, the link configuration
1445 * is passed on the link from the PHY, and all of
1446 * link_config.{speed,duplex,an_enabled,pause} are not used.
1447 * - the only possible use would be link_config.advertising
1448 * pause modes when in 1000base-X mode with a PHY, but in
1449 * the presence of a PHY, this should not be changed as that
1450 * should be determined from the media side advertisement.
1452 return phy_ethtool_ksettings_set(pl->phydev, kset);
1455 linkmode_copy(support, pl->supported);
1456 config = pl->link_config;
1457 config.an_enabled = kset->base.autoneg == AUTONEG_ENABLE;
1459 /* Mask out unsupported advertisements, and force the autoneg bit */
1460 linkmode_and(config.advertising, kset->link_modes.advertising,
1462 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising,
1465 /* FIXME: should we reject autoneg if phy/mac does not support it? */
1466 switch (kset->base.autoneg) {
1467 case AUTONEG_DISABLE:
1468 /* Autonegotiation disabled, select a suitable speed and
1471 s = phy_lookup_setting(kset->base.speed, kset->base.duplex,
1476 /* If we have a fixed link, refuse to change link parameters.
1477 * If the link parameters match, accept them but do nothing.
1479 if (pl->cur_link_an_mode == MLO_AN_FIXED) {
1480 if (s->speed != pl->link_config.speed ||
1481 s->duplex != pl->link_config.duplex)
1486 config.speed = s->speed;
1487 config.duplex = s->duplex;
1490 case AUTONEG_ENABLE:
1491 /* If we have a fixed link, allow autonegotiation (since that
1492 * is our default case) but do not allow the advertisement to
1493 * be changed. If the advertisement matches, simply return.
1495 if (pl->cur_link_an_mode == MLO_AN_FIXED) {
1496 if (!linkmode_equal(config.advertising,
1497 pl->link_config.advertising))
1502 config.speed = SPEED_UNKNOWN;
1503 config.duplex = DUPLEX_UNKNOWN;
1510 /* We have ruled out the case with a PHY attached, and the
1511 * fixed-link cases. All that is left are in-band links.
1513 if (phylink_validate(pl, support, &config))
1516 /* If autonegotiation is enabled, we must have an advertisement */
1517 if (config.an_enabled && phylink_is_empty_linkmode(config.advertising))
1520 /* If this link is with an SFP, ensure that changes to advertised modes
1521 * also cause the associated interface to be selected such that the
1522 * link can be configured correctly.
1524 if (pl->sfp_port && pl->sfp_bus) {
1525 config.interface = sfp_select_interface(pl->sfp_bus,
1526 config.advertising);
1527 if (config.interface == PHY_INTERFACE_MODE_NA) {
1529 "selection of interface failed, advertisement %*pb\n",
1530 __ETHTOOL_LINK_MODE_MASK_NBITS,
1531 config.advertising);
1535 /* Revalidate with the selected interface */
1536 linkmode_copy(support, pl->supported);
1537 if (phylink_validate(pl, support, &config)) {
1538 phylink_err(pl, "validation of %s/%s with support %*pb failed\n",
1539 phylink_an_mode_str(pl->cur_link_an_mode),
1540 phy_modes(config.interface),
1541 __ETHTOOL_LINK_MODE_MASK_NBITS, support);
1546 mutex_lock(&pl->state_mutex);
1547 pl->link_config.speed = config.speed;
1548 pl->link_config.duplex = config.duplex;
1549 pl->link_config.an_enabled = config.an_enabled;
1551 if (pl->link_config.interface != config.interface) {
1552 /* The interface changed, e.g. 1000base-X <-> 2500base-X */
1553 /* We need to force the link down, then change the interface */
1554 if (pl->old_link_state) {
1555 phylink_link_down(pl);
1556 pl->old_link_state = false;
1558 if (!test_bit(PHYLINK_DISABLE_STOPPED,
1559 &pl->phylink_disable_state))
1560 phylink_major_config(pl, false, &config);
1561 pl->link_config.interface = config.interface;
1562 linkmode_copy(pl->link_config.advertising, config.advertising);
1563 } else if (!linkmode_equal(pl->link_config.advertising,
1564 config.advertising)) {
1565 linkmode_copy(pl->link_config.advertising, config.advertising);
1566 phylink_change_inband_advert(pl);
1568 mutex_unlock(&pl->state_mutex);
1572 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set);
1575 * phylink_ethtool_nway_reset() - restart negotiation
1576 * @pl: a pointer to a &struct phylink returned from phylink_create()
1578 * Restart negotiation for the phylink instance specified by @pl. This will
1579 * cause any attached phy to restart negotiation with the link partner, and
1580 * if the MAC is in a BaseX mode, the MAC will also be requested to restart
1583 * Returns zero on success, or negative error code.
1585 int phylink_ethtool_nway_reset(struct phylink *pl)
1592 ret = phy_restart_aneg(pl->phydev);
1593 phylink_mac_pcs_an_restart(pl);
1597 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset);
1600 * phylink_ethtool_get_pauseparam() - get the current pause parameters
1601 * @pl: a pointer to a &struct phylink returned from phylink_create()
1602 * @pause: a pointer to a &struct ethtool_pauseparam
1604 void phylink_ethtool_get_pauseparam(struct phylink *pl,
1605 struct ethtool_pauseparam *pause)
1609 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN);
1610 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX);
1611 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX);
1613 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam);
1616 * phylink_ethtool_set_pauseparam() - set the current pause parameters
1617 * @pl: a pointer to a &struct phylink returned from phylink_create()
1618 * @pause: a pointer to a &struct ethtool_pauseparam
1620 int phylink_ethtool_set_pauseparam(struct phylink *pl,
1621 struct ethtool_pauseparam *pause)
1623 struct phylink_link_state *config = &pl->link_config;
1624 bool manual_changed;
1629 if (pl->cur_link_an_mode == MLO_AN_FIXED)
1632 if (!phylink_test(pl->supported, Pause) &&
1633 !phylink_test(pl->supported, Asym_Pause))
1636 if (!phylink_test(pl->supported, Asym_Pause) &&
1637 pause->rx_pause != pause->tx_pause)
1642 pause_state |= MLO_PAUSE_AN;
1643 if (pause->rx_pause)
1644 pause_state |= MLO_PAUSE_RX;
1645 if (pause->tx_pause)
1646 pause_state |= MLO_PAUSE_TX;
1648 mutex_lock(&pl->state_mutex);
1650 * See the comments for linkmode_set_pause(), wrt the deficiencies
1651 * with the current implementation. A solution to this issue would
1653 * ethtool Local device
1654 * rx tx Pause AsymDir
1659 * and then use the ethtool rx/tx enablement status to mask the
1660 * rx/tx pause resolution.
1662 linkmode_set_pause(config->advertising, pause->tx_pause,
1665 manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN ||
1666 (!(pause_state & MLO_PAUSE_AN) &&
1667 (config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK);
1669 config->pause = pause_state;
1671 /* Update our in-band advertisement, triggering a renegotiation if
1672 * the advertisement changed.
1675 phylink_change_inband_advert(pl);
1677 mutex_unlock(&pl->state_mutex);
1679 /* If we have a PHY, a change of the pause frame advertisement will
1680 * cause phylib to renegotiate (if AN is enabled) which will in turn
1681 * call our phylink_phy_change() and trigger a resolve. Note that
1682 * we can't hold our state mutex while calling phy_set_asym_pause().
1685 phy_set_asym_pause(pl->phydev, pause->rx_pause,
1688 /* If the manual pause settings changed, make sure we trigger a
1689 * resolve to update their state; we can not guarantee that the
1692 if (manual_changed) {
1693 pl->mac_link_dropped = true;
1694 phylink_run_resolve(pl);
1699 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam);
1702 * phylink_ethtool_get_eee_err() - read the energy efficient ethernet error
1704 * @pl: a pointer to a &struct phylink returned from phylink_create().
1706 * Read the Energy Efficient Ethernet error counter from the PHY associated
1707 * with the phylink instance specified by @pl.
1709 * Returns positive error counter value, or negative error code.
1711 int phylink_get_eee_err(struct phylink *pl)
1718 ret = phy_get_eee_err(pl->phydev);
1722 EXPORT_SYMBOL_GPL(phylink_get_eee_err);
1725 * phylink_init_eee() - init and check the EEE features
1726 * @pl: a pointer to a &struct phylink returned from phylink_create()
1727 * @clk_stop_enable: allow PHY to stop receive clock
1729 * Must be called either with RTNL held or within mac_link_up()
1731 int phylink_init_eee(struct phylink *pl, bool clk_stop_enable)
1733 int ret = -EOPNOTSUPP;
1736 ret = phy_init_eee(pl->phydev, clk_stop_enable);
1740 EXPORT_SYMBOL_GPL(phylink_init_eee);
1743 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters
1744 * @pl: a pointer to a &struct phylink returned from phylink_create()
1745 * @eee: a pointer to a &struct ethtool_eee for the read parameters
1747 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee)
1749 int ret = -EOPNOTSUPP;
1754 ret = phy_ethtool_get_eee(pl->phydev, eee);
1758 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee);
1761 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters
1762 * @pl: a pointer to a &struct phylink returned from phylink_create()
1763 * @eee: a pointer to a &struct ethtool_eee for the desired parameters
1765 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee)
1767 int ret = -EOPNOTSUPP;
1772 ret = phy_ethtool_set_eee(pl->phydev, eee);
1776 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee);
1778 /* This emulates MII registers for a fixed-mode phy operating as per the
1779 * passed in state. "aneg" defines if we report negotiation is possible.
1781 * FIXME: should deal with negotiation state too.
1783 static int phylink_mii_emul_read(unsigned int reg,
1784 struct phylink_link_state *state)
1786 struct fixed_phy_status fs;
1787 unsigned long *lpa = state->lp_advertising;
1790 fs.link = state->link;
1791 fs.speed = state->speed;
1792 fs.duplex = state->duplex;
1793 fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa);
1794 fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa);
1796 val = swphy_read_reg(reg, &fs);
1797 if (reg == MII_BMSR) {
1798 if (!state->an_complete)
1799 val &= ~BMSR_ANEGCOMPLETE;
1804 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id,
1807 struct phy_device *phydev = pl->phydev;
1810 if (mdio_phy_id_is_c45(phy_id)) {
1811 prtad = mdio_phy_id_prtad(phy_id);
1812 devad = mdio_phy_id_devad(phy_id);
1813 devad = mdiobus_c45_addr(devad, reg);
1814 } else if (phydev->is_c45) {
1820 devad = __ffs(phydev->c45_ids.mmds_present);
1824 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN))
1826 devad = MDIO_MMD_AN;
1827 if (reg == MII_ADVERTISE)
1828 reg = MDIO_AN_ADVERTISE;
1836 devad = mdiobus_c45_addr(devad, reg);
1841 return mdiobus_read(pl->phydev->mdio.bus, prtad, devad);
1844 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id,
1845 unsigned int reg, unsigned int val)
1847 struct phy_device *phydev = pl->phydev;
1850 if (mdio_phy_id_is_c45(phy_id)) {
1851 prtad = mdio_phy_id_prtad(phy_id);
1852 devad = mdio_phy_id_devad(phy_id);
1853 devad = mdiobus_c45_addr(devad, reg);
1854 } else if (phydev->is_c45) {
1860 devad = __ffs(phydev->c45_ids.mmds_present);
1864 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN))
1866 devad = MDIO_MMD_AN;
1867 if (reg == MII_ADVERTISE)
1868 reg = MDIO_AN_ADVERTISE;
1876 devad = mdiobus_c45_addr(devad, reg);
1882 return mdiobus_write(phydev->mdio.bus, prtad, devad, val);
1885 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id,
1888 struct phylink_link_state state;
1891 switch (pl->cur_link_an_mode) {
1894 phylink_get_fixed_state(pl, &state);
1895 val = phylink_mii_emul_read(reg, &state);
1904 phylink_mac_pcs_get_state(pl, &state);
1905 val = phylink_mii_emul_read(reg, &state);
1910 return val & 0xffff;
1913 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id,
1914 unsigned int reg, unsigned int val)
1916 switch (pl->cur_link_an_mode) {
1931 * phylink_mii_ioctl() - generic mii ioctl interface
1932 * @pl: a pointer to a &struct phylink returned from phylink_create()
1933 * @ifr: a pointer to a &struct ifreq for socket ioctls
1934 * @cmd: ioctl cmd to execute
1936 * Perform the specified MII ioctl on the PHY attached to the phylink instance
1937 * specified by @pl. If no PHY is attached, emulate the presence of the PHY.
1939 * Returns: zero on success or negative error code.
1942 * read register from the current PHY.
1944 * read register from the specified PHY.
1946 * set a register on the specified PHY.
1948 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd)
1950 struct mii_ioctl_data *mii = if_mii(ifr);
1956 /* PHYs only exist for MLO_AN_PHY and SGMII */
1959 mii->phy_id = pl->phydev->mdio.addr;
1963 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num);
1971 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num,
1976 ret = phy_mii_ioctl(pl->phydev, ifr, cmd);
1986 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num);
1994 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num,
2006 EXPORT_SYMBOL_GPL(phylink_mii_ioctl);
2009 * phylink_speed_down() - set the non-SFP PHY to lowest speed supported by both
2011 * @pl: a pointer to a &struct phylink returned from phylink_create()
2012 * @sync: perform action synchronously
2014 * If we have a PHY that is not part of a SFP module, then set the speed
2015 * as described in the phy_speed_down() function. Please see this function
2016 * for a description of the @sync parameter.
2018 * Returns zero if there is no PHY, otherwise as per phy_speed_down().
2020 int phylink_speed_down(struct phylink *pl, bool sync)
2026 if (!pl->sfp_bus && pl->phydev)
2027 ret = phy_speed_down(pl->phydev, sync);
2031 EXPORT_SYMBOL_GPL(phylink_speed_down);
2034 * phylink_speed_up() - restore the advertised speeds prior to the call to
2035 * phylink_speed_down()
2036 * @pl: a pointer to a &struct phylink returned from phylink_create()
2038 * If we have a PHY that is not part of a SFP module, then restore the
2039 * PHY speeds as per phy_speed_up().
2041 * Returns zero if there is no PHY, otherwise as per phy_speed_up().
2043 int phylink_speed_up(struct phylink *pl)
2049 if (!pl->sfp_bus && pl->phydev)
2050 ret = phy_speed_up(pl->phydev);
2054 EXPORT_SYMBOL_GPL(phylink_speed_up);
2056 static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus)
2058 struct phylink *pl = upstream;
2060 pl->netdev->sfp_bus = bus;
2063 static void phylink_sfp_detach(void *upstream, struct sfp_bus *bus)
2065 struct phylink *pl = upstream;
2067 pl->netdev->sfp_bus = NULL;
2070 static int phylink_sfp_config(struct phylink *pl, u8 mode,
2071 const unsigned long *supported,
2072 const unsigned long *advertising)
2074 __ETHTOOL_DECLARE_LINK_MODE_MASK(support1);
2075 __ETHTOOL_DECLARE_LINK_MODE_MASK(support);
2076 struct phylink_link_state config;
2077 phy_interface_t iface;
2081 linkmode_copy(support, supported);
2083 memset(&config, 0, sizeof(config));
2084 linkmode_copy(config.advertising, advertising);
2085 config.interface = PHY_INTERFACE_MODE_NA;
2086 config.speed = SPEED_UNKNOWN;
2087 config.duplex = DUPLEX_UNKNOWN;
2088 config.pause = MLO_PAUSE_AN;
2089 config.an_enabled = pl->link_config.an_enabled;
2091 /* Ignore errors if we're expecting a PHY to attach later */
2092 ret = phylink_validate(pl, support, &config);
2094 phylink_err(pl, "validation with support %*pb failed: %d\n",
2095 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
2099 iface = sfp_select_interface(pl->sfp_bus, config.advertising);
2100 if (iface == PHY_INTERFACE_MODE_NA) {
2102 "selection of interface failed, advertisement %*pb\n",
2103 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising);
2107 config.interface = iface;
2108 linkmode_copy(support1, support);
2109 ret = phylink_validate(pl, support1, &config);
2111 phylink_err(pl, "validation of %s/%s with support %*pb failed: %d\n",
2112 phylink_an_mode_str(mode),
2113 phy_modes(config.interface),
2114 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
2118 phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n",
2119 phylink_an_mode_str(mode), phy_modes(config.interface),
2120 __ETHTOOL_LINK_MODE_MASK_NBITS, support);
2122 if (phy_interface_mode_is_8023z(iface) && pl->phydev)
2125 changed = !linkmode_equal(pl->supported, support) ||
2126 !linkmode_equal(pl->link_config.advertising,
2127 config.advertising);
2129 linkmode_copy(pl->supported, support);
2130 linkmode_copy(pl->link_config.advertising, config.advertising);
2133 if (pl->cur_link_an_mode != mode ||
2134 pl->link_config.interface != config.interface) {
2135 pl->link_config.interface = config.interface;
2136 pl->cur_link_an_mode = mode;
2140 phylink_info(pl, "switched to %s/%s link mode\n",
2141 phylink_an_mode_str(mode),
2142 phy_modes(config.interface));
2145 pl->link_port = pl->sfp_port;
2147 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED,
2148 &pl->phylink_disable_state))
2149 phylink_mac_initial_config(pl, false);
2154 static int phylink_sfp_module_insert(void *upstream,
2155 const struct sfp_eeprom_id *id)
2157 struct phylink *pl = upstream;
2158 unsigned long *support = pl->sfp_support;
2162 linkmode_zero(support);
2163 sfp_parse_support(pl->sfp_bus, id, support);
2164 pl->sfp_port = sfp_parse_port(pl->sfp_bus, id, support);
2166 /* If this module may have a PHY connecting later, defer until later */
2167 pl->sfp_may_have_phy = sfp_may_have_phy(pl->sfp_bus, id);
2168 if (pl->sfp_may_have_phy)
2171 return phylink_sfp_config(pl, MLO_AN_INBAND, support, support);
2174 static int phylink_sfp_module_start(void *upstream)
2176 struct phylink *pl = upstream;
2178 /* If this SFP module has a PHY, start the PHY now. */
2180 phy_start(pl->phydev);
2184 /* If the module may have a PHY but we didn't detect one we
2185 * need to configure the MAC here.
2187 if (!pl->sfp_may_have_phy)
2190 return phylink_sfp_config(pl, MLO_AN_INBAND,
2191 pl->sfp_support, pl->sfp_support);
2194 static void phylink_sfp_module_stop(void *upstream)
2196 struct phylink *pl = upstream;
2198 /* If this SFP module has a PHY, stop it. */
2200 phy_stop(pl->phydev);
2203 static void phylink_sfp_link_down(void *upstream)
2205 struct phylink *pl = upstream;
2209 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK);
2212 static void phylink_sfp_link_up(void *upstream)
2214 struct phylink *pl = upstream;
2218 clear_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state);
2219 phylink_run_resolve(pl);
2222 /* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII
2223 * or 802.3z control word, so inband will not work.
2225 static bool phylink_phy_no_inband(struct phy_device *phy)
2227 return phy->is_c45 &&
2228 (phy->c45_ids.device_ids[1] & 0xfffffff0) == 0xae025150;
2231 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy)
2233 struct phylink *pl = upstream;
2234 phy_interface_t interface;
2239 * This is the new way of dealing with flow control for PHYs,
2240 * as described by Timur Tabi in commit 529ed1275263 ("net: phy:
2241 * phy drivers should not set SUPPORTED_[Asym_]Pause") except
2242 * using our validate call to the MAC, we rely upon the MAC
2243 * clearing the bits from both supported and advertising fields.
2245 phy_support_asym_pause(phy);
2247 if (phylink_phy_no_inband(phy))
2250 mode = MLO_AN_INBAND;
2252 /* Do the initial configuration */
2253 ret = phylink_sfp_config(pl, mode, phy->supported, phy->advertising);
2257 interface = pl->link_config.interface;
2258 ret = phylink_attach_phy(pl, phy, interface);
2262 ret = phylink_bringup_phy(pl, phy, interface);
2269 static void phylink_sfp_disconnect_phy(void *upstream)
2271 phylink_disconnect_phy(upstream);
2274 static const struct sfp_upstream_ops sfp_phylink_ops = {
2275 .attach = phylink_sfp_attach,
2276 .detach = phylink_sfp_detach,
2277 .module_insert = phylink_sfp_module_insert,
2278 .module_start = phylink_sfp_module_start,
2279 .module_stop = phylink_sfp_module_stop,
2280 .link_up = phylink_sfp_link_up,
2281 .link_down = phylink_sfp_link_down,
2282 .connect_phy = phylink_sfp_connect_phy,
2283 .disconnect_phy = phylink_sfp_disconnect_phy,
2286 /* Helpers for MAC drivers */
2289 * phylink_helper_basex_speed() - 1000BaseX/2500BaseX helper
2290 * @state: a pointer to a &struct phylink_link_state
2292 * Inspect the interface mode, advertising mask or forced speed and
2293 * decide whether to run at 2.5Gbit or 1Gbit appropriately, switching
2294 * the interface mode to suit. @state->interface is appropriately
2295 * updated, and the advertising mask has the "other" baseX_Full flag
2298 void phylink_helper_basex_speed(struct phylink_link_state *state)
2300 if (phy_interface_mode_is_8023z(state->interface)) {
2301 bool want_2500 = state->an_enabled ?
2302 phylink_test(state->advertising, 2500baseX_Full) :
2303 state->speed == SPEED_2500;
2306 phylink_clear(state->advertising, 1000baseX_Full);
2307 state->interface = PHY_INTERFACE_MODE_2500BASEX;
2309 phylink_clear(state->advertising, 2500baseX_Full);
2310 state->interface = PHY_INTERFACE_MODE_1000BASEX;
2314 EXPORT_SYMBOL_GPL(phylink_helper_basex_speed);
2316 static void phylink_decode_c37_word(struct phylink_link_state *state,
2317 uint16_t config_reg, int speed)
2319 bool tx_pause, rx_pause;
2322 if (speed == SPEED_2500)
2323 fd_bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT;
2325 fd_bit = ETHTOOL_LINK_MODE_1000baseX_Full_BIT;
2327 mii_lpa_mod_linkmode_x(state->lp_advertising, config_reg, fd_bit);
2329 if (linkmode_test_bit(fd_bit, state->advertising) &&
2330 linkmode_test_bit(fd_bit, state->lp_advertising)) {
2331 state->speed = speed;
2332 state->duplex = DUPLEX_FULL;
2334 /* negotiation failure */
2335 state->link = false;
2338 linkmode_resolve_pause(state->advertising, state->lp_advertising,
2339 &tx_pause, &rx_pause);
2342 state->pause |= MLO_PAUSE_TX;
2344 state->pause |= MLO_PAUSE_RX;
2347 static void phylink_decode_sgmii_word(struct phylink_link_state *state,
2348 uint16_t config_reg)
2350 if (!(config_reg & LPA_SGMII_LINK)) {
2351 state->link = false;
2355 switch (config_reg & LPA_SGMII_SPD_MASK) {
2357 state->speed = SPEED_10;
2360 state->speed = SPEED_100;
2362 case LPA_SGMII_1000:
2363 state->speed = SPEED_1000;
2366 state->link = false;
2369 if (config_reg & LPA_SGMII_FULL_DUPLEX)
2370 state->duplex = DUPLEX_FULL;
2372 state->duplex = DUPLEX_HALF;
2376 * phylink_decode_usxgmii_word() - decode the USXGMII word from a MAC PCS
2377 * @state: a pointer to a struct phylink_link_state.
2378 * @lpa: a 16 bit value which stores the USXGMII auto-negotiation word
2380 * Helper for MAC PCS supporting the USXGMII protocol and the auto-negotiation
2381 * code word. Decode the USXGMII code word and populate the corresponding fields
2382 * (speed, duplex) into the phylink_link_state structure.
2384 void phylink_decode_usxgmii_word(struct phylink_link_state *state,
2387 switch (lpa & MDIO_USXGMII_SPD_MASK) {
2388 case MDIO_USXGMII_10:
2389 state->speed = SPEED_10;
2391 case MDIO_USXGMII_100:
2392 state->speed = SPEED_100;
2394 case MDIO_USXGMII_1000:
2395 state->speed = SPEED_1000;
2397 case MDIO_USXGMII_2500:
2398 state->speed = SPEED_2500;
2400 case MDIO_USXGMII_5000:
2401 state->speed = SPEED_5000;
2403 case MDIO_USXGMII_10G:
2404 state->speed = SPEED_10000;
2407 state->link = false;
2411 if (lpa & MDIO_USXGMII_FULL_DUPLEX)
2412 state->duplex = DUPLEX_FULL;
2414 state->duplex = DUPLEX_HALF;
2416 EXPORT_SYMBOL_GPL(phylink_decode_usxgmii_word);
2419 * phylink_mii_c22_pcs_get_state() - read the MAC PCS state
2420 * @pcs: a pointer to a &struct mdio_device.
2421 * @state: a pointer to a &struct phylink_link_state.
2423 * Helper for MAC PCS supporting the 802.3 clause 22 register set for
2424 * clause 37 negotiation and/or SGMII control.
2426 * Read the MAC PCS state from the MII device configured in @config and
2427 * parse the Clause 37 or Cisco SGMII link partner negotiation word into
2428 * the phylink @state structure. This is suitable to be directly plugged
2429 * into the mac_pcs_get_state() member of the struct phylink_mac_ops
2432 void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs,
2433 struct phylink_link_state *state)
2435 struct mii_bus *bus = pcs->bus;
2436 int addr = pcs->addr;
2439 bmsr = mdiobus_read(bus, addr, MII_BMSR);
2440 lpa = mdiobus_read(bus, addr, MII_LPA);
2441 if (bmsr < 0 || lpa < 0) {
2442 state->link = false;
2446 state->link = !!(bmsr & BMSR_LSTATUS);
2447 state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE);
2451 switch (state->interface) {
2452 case PHY_INTERFACE_MODE_1000BASEX:
2453 phylink_decode_c37_word(state, lpa, SPEED_1000);
2456 case PHY_INTERFACE_MODE_2500BASEX:
2457 phylink_decode_c37_word(state, lpa, SPEED_2500);
2460 case PHY_INTERFACE_MODE_SGMII:
2461 case PHY_INTERFACE_MODE_QSGMII:
2462 phylink_decode_sgmii_word(state, lpa);
2466 state->link = false;
2470 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state);
2473 * phylink_mii_c22_pcs_set_advertisement() - configure the clause 37 PCS
2475 * @pcs: a pointer to a &struct mdio_device.
2476 * @interface: the PHY interface mode being configured
2477 * @advertising: the ethtool advertisement mask
2479 * Helper for MAC PCS supporting the 802.3 clause 22 register set for
2480 * clause 37 negotiation and/or SGMII control.
2482 * Configure the clause 37 PCS advertisement as specified by @state. This
2483 * does not trigger a renegotiation; phylink will do that via the
2484 * mac_an_restart() method of the struct phylink_mac_ops structure.
2486 * Returns negative error code on failure to configure the advertisement,
2487 * zero if no change has been made, or one if the advertisement has changed.
2489 int phylink_mii_c22_pcs_set_advertisement(struct mdio_device *pcs,
2490 phy_interface_t interface,
2491 const unsigned long *advertising)
2493 struct mii_bus *bus = pcs->bus;
2494 int addr = pcs->addr;
2498 switch (interface) {
2499 case PHY_INTERFACE_MODE_1000BASEX:
2500 case PHY_INTERFACE_MODE_2500BASEX:
2501 adv = ADVERTISE_1000XFULL;
2502 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2504 adv |= ADVERTISE_1000XPAUSE;
2505 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2507 adv |= ADVERTISE_1000XPSE_ASYM;
2509 val = mdiobus_read(bus, addr, MII_ADVERTISE);
2516 ret = mdiobus_write(bus, addr, MII_ADVERTISE, adv);
2522 case PHY_INTERFACE_MODE_SGMII:
2523 val = mdiobus_read(bus, addr, MII_ADVERTISE);
2530 ret = mdiobus_write(bus, addr, MII_ADVERTISE, 0x0001);
2537 /* Nothing to do for other modes */
2541 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_set_advertisement);
2544 * phylink_mii_c22_pcs_config() - configure clause 22 PCS
2545 * @pcs: a pointer to a &struct mdio_device.
2546 * @mode: link autonegotiation mode
2547 * @interface: the PHY interface mode being configured
2548 * @advertising: the ethtool advertisement mask
2550 * Configure a Clause 22 PCS PHY with the appropriate negotiation
2551 * parameters for the @mode, @interface and @advertising parameters.
2552 * Returns negative error number on failure, zero if the advertisement
2553 * has not changed, or positive if there is a change.
2555 int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode,
2556 phy_interface_t interface,
2557 const unsigned long *advertising)
2563 ret = phylink_mii_c22_pcs_set_advertisement(pcs, interface,
2570 bmcr = mode == MLO_AN_INBAND ? BMCR_ANENABLE : 0;
2571 ret = mdiobus_modify(pcs->bus, pcs->addr, MII_BMCR,
2572 BMCR_ANENABLE, bmcr);
2576 return changed ? 1 : 0;
2578 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config);
2581 * phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation
2582 * @pcs: a pointer to a &struct mdio_device.
2584 * Helper for MAC PCS supporting the 802.3 clause 22 register set for
2585 * clause 37 negotiation.
2587 * Restart the clause 37 negotiation with the link partner. This is
2588 * suitable to be directly plugged into the mac_pcs_get_state() member
2589 * of the struct phylink_mac_ops structure.
2591 void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs)
2593 struct mii_bus *bus = pcs->bus;
2594 int val, addr = pcs->addr;
2596 val = mdiobus_read(bus, addr, MII_BMCR);
2598 val |= BMCR_ANRESTART;
2600 mdiobus_write(bus, addr, MII_BMCR, val);
2603 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart);
2605 void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs,
2606 struct phylink_link_state *state)
2608 struct mii_bus *bus = pcs->bus;
2609 int addr = pcs->addr;
2612 stat = mdiobus_c45_read(bus, addr, MDIO_MMD_PCS, MDIO_STAT1);
2614 state->link = false;
2618 state->link = !!(stat & MDIO_STAT1_LSTATUS);
2622 switch (state->interface) {
2623 case PHY_INTERFACE_MODE_10GBASER:
2624 state->speed = SPEED_10000;
2625 state->duplex = DUPLEX_FULL;
2632 EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state);
2634 MODULE_LICENSE("GPL v2");