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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * phylink models the MAC to optional PHY connection, supporting
4 * technologies such as SFP cages where the PHY is hot-pluggable.
5 *
6 * Copyright (C) 2015 Russell King
7 */
8#include <linux/acpi.h>
9#include <linux/ethtool.h>
10#include <linux/export.h>
11#include <linux/gpio/consumer.h>
12#include <linux/netdevice.h>
13#include <linux/of.h>
14#include <linux/of_mdio.h>
15#include <linux/phy.h>
16#include <linux/phy_fixed.h>
17#include <linux/phylink.h>
18#include <linux/rtnetlink.h>
19#include <linux/spinlock.h>
20#include <linux/timer.h>
21#include <linux/workqueue.h>
22
23#include "sfp.h"
24#include "swphy.h"
25
26#define SUPPORTED_INTERFACES \
27 (SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \
28 SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane)
29#define ADVERTISED_INTERFACES \
30 (ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \
31 ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane)
32
33enum {
34 PHYLINK_DISABLE_STOPPED,
35 PHYLINK_DISABLE_LINK,
36 PHYLINK_DISABLE_MAC_WOL,
37};
38
39/**
40 * struct phylink - internal data type for phylink
41 */
42struct phylink {
43 /* private: */
44 struct net_device *netdev;
45 const struct phylink_mac_ops *mac_ops;
46 const struct phylink_pcs_ops *pcs_ops;
47 struct phylink_config *config;
48 struct phylink_pcs *pcs;
49 struct device *dev;
50 unsigned int old_link_state:1;
51
52 unsigned long phylink_disable_state; /* bitmask of disables */
53 struct phy_device *phydev;
54 phy_interface_t link_interface; /* PHY_INTERFACE_xxx */
55 u8 cfg_link_an_mode; /* MLO_AN_xxx */
56 u8 cur_link_an_mode;
57 u8 link_port; /* The current non-phy ethtool port */
58 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
59
60 /* The link configuration settings */
61 struct phylink_link_state link_config;
62
63 /* The current settings */
64 phy_interface_t cur_interface;
65
66 struct gpio_desc *link_gpio;
67 unsigned int link_irq;
68 struct timer_list link_poll;
69 void (*get_fixed_state)(struct net_device *dev,
70 struct phylink_link_state *s);
71
72 struct mutex state_mutex;
73 struct phylink_link_state phy_state;
74 struct work_struct resolve;
75
76 bool mac_link_dropped;
77
78 struct sfp_bus *sfp_bus;
79 bool sfp_may_have_phy;
80 __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support);
81 u8 sfp_port;
82};
83
84#define phylink_printk(level, pl, fmt, ...) \
85 do { \
86 if ((pl)->config->type == PHYLINK_NETDEV) \
87 netdev_printk(level, (pl)->netdev, fmt, ##__VA_ARGS__); \
88 else if ((pl)->config->type == PHYLINK_DEV) \
89 dev_printk(level, (pl)->dev, fmt, ##__VA_ARGS__); \
90 } while (0)
91
92#define phylink_err(pl, fmt, ...) \
93 phylink_printk(KERN_ERR, pl, fmt, ##__VA_ARGS__)
94#define phylink_warn(pl, fmt, ...) \
95 phylink_printk(KERN_WARNING, pl, fmt, ##__VA_ARGS__)
96#define phylink_info(pl, fmt, ...) \
97 phylink_printk(KERN_INFO, pl, fmt, ##__VA_ARGS__)
98#if defined(CONFIG_DYNAMIC_DEBUG)
99#define phylink_dbg(pl, fmt, ...) \
100do { \
101 if ((pl)->config->type == PHYLINK_NETDEV) \
102 netdev_dbg((pl)->netdev, fmt, ##__VA_ARGS__); \
103 else if ((pl)->config->type == PHYLINK_DEV) \
104 dev_dbg((pl)->dev, fmt, ##__VA_ARGS__); \
105} while (0)
106#elif defined(DEBUG)
107#define phylink_dbg(pl, fmt, ...) \
108 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__)
109#else
110#define phylink_dbg(pl, fmt, ...) \
111({ \
112 if (0) \
113 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__); \
114})
115#endif
116
117/**
118 * phylink_set_port_modes() - set the port type modes in the ethtool mask
119 * @mask: ethtool link mode mask
120 *
121 * Sets all the port type modes in the ethtool mask. MAC drivers should
122 * use this in their 'validate' callback.
123 */
124void phylink_set_port_modes(unsigned long *mask)
125{
126 phylink_set(mask, TP);
127 phylink_set(mask, AUI);
128 phylink_set(mask, MII);
129 phylink_set(mask, FIBRE);
130 phylink_set(mask, BNC);
131 phylink_set(mask, Backplane);
132}
133EXPORT_SYMBOL_GPL(phylink_set_port_modes);
134
135static int phylink_is_empty_linkmode(const unsigned long *linkmode)
136{
137 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, };
138
139 phylink_set_port_modes(tmp);
140 phylink_set(tmp, Autoneg);
141 phylink_set(tmp, Pause);
142 phylink_set(tmp, Asym_Pause);
143
144 return linkmode_subset(linkmode, tmp);
145}
146
147static const char *phylink_an_mode_str(unsigned int mode)
148{
149 static const char *modestr[] = {
150 [MLO_AN_PHY] = "phy",
151 [MLO_AN_FIXED] = "fixed",
152 [MLO_AN_INBAND] = "inband",
153 };
154
155 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown";
156}
157
158static int phylink_validate(struct phylink *pl, unsigned long *supported,
159 struct phylink_link_state *state)
160{
161 pl->mac_ops->validate(pl->config, supported, state);
162
163 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0;
164}
165
166static int phylink_parse_fixedlink(struct phylink *pl,
167 struct fwnode_handle *fwnode)
168{
169 struct fwnode_handle *fixed_node;
170 const struct phy_setting *s;
171 struct gpio_desc *desc;
172 u32 speed;
173 int ret;
174
175 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link");
176 if (fixed_node) {
177 ret = fwnode_property_read_u32(fixed_node, "speed", &speed);
178
179 pl->link_config.speed = speed;
180 pl->link_config.duplex = DUPLEX_HALF;
181
182 if (fwnode_property_read_bool(fixed_node, "full-duplex"))
183 pl->link_config.duplex = DUPLEX_FULL;
184
185 /* We treat the "pause" and "asym-pause" terminology as
186 * defining the link partner's ability.
187 */
188 if (fwnode_property_read_bool(fixed_node, "pause"))
189 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
190 pl->link_config.lp_advertising);
191 if (fwnode_property_read_bool(fixed_node, "asym-pause"))
192 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
193 pl->link_config.lp_advertising);
194
195 if (ret == 0) {
196 desc = fwnode_gpiod_get_index(fixed_node, "link", 0,
197 GPIOD_IN, "?");
198
199 if (!IS_ERR(desc))
200 pl->link_gpio = desc;
201 else if (desc == ERR_PTR(-EPROBE_DEFER))
202 ret = -EPROBE_DEFER;
203 }
204 fwnode_handle_put(fixed_node);
205
206 if (ret)
207 return ret;
208 } else {
209 u32 prop[5];
210
211 ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
212 NULL, 0);
213 if (ret != ARRAY_SIZE(prop)) {
214 phylink_err(pl, "broken fixed-link?\n");
215 return -EINVAL;
216 }
217
218 ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
219 prop, ARRAY_SIZE(prop));
220 if (!ret) {
221 pl->link_config.duplex = prop[1] ?
222 DUPLEX_FULL : DUPLEX_HALF;
223 pl->link_config.speed = prop[2];
224 if (prop[3])
225 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
226 pl->link_config.lp_advertising);
227 if (prop[4])
228 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
229 pl->link_config.lp_advertising);
230 }
231 }
232
233 if (pl->link_config.speed > SPEED_1000 &&
234 pl->link_config.duplex != DUPLEX_FULL)
235 phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n",
236 pl->link_config.speed);
237
238 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
239 linkmode_copy(pl->link_config.advertising, pl->supported);
240 phylink_validate(pl, pl->supported, &pl->link_config);
241
242 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex,
243 pl->supported, true);
244 linkmode_zero(pl->supported);
245 phylink_set(pl->supported, MII);
246 phylink_set(pl->supported, Pause);
247 phylink_set(pl->supported, Asym_Pause);
248 phylink_set(pl->supported, Autoneg);
249 if (s) {
250 __set_bit(s->bit, pl->supported);
251 __set_bit(s->bit, pl->link_config.lp_advertising);
252 } else {
253 phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n",
254 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half",
255 pl->link_config.speed);
256 }
257
258 linkmode_and(pl->link_config.advertising, pl->link_config.advertising,
259 pl->supported);
260
261 pl->link_config.link = 1;
262 pl->link_config.an_complete = 1;
263
264 return 0;
265}
266
267static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode)
268{
269 struct fwnode_handle *dn;
270 const char *managed;
271
272 dn = fwnode_get_named_child_node(fwnode, "fixed-link");
273 if (dn || fwnode_property_present(fwnode, "fixed-link"))
274 pl->cfg_link_an_mode = MLO_AN_FIXED;
275 fwnode_handle_put(dn);
276
277 if ((fwnode_property_read_string(fwnode, "managed", &managed) == 0 &&
278 strcmp(managed, "in-band-status") == 0) ||
279 pl->config->ovr_an_inband) {
280 if (pl->cfg_link_an_mode == MLO_AN_FIXED) {
281 phylink_err(pl,
282 "can't use both fixed-link and in-band-status\n");
283 return -EINVAL;
284 }
285
286 linkmode_zero(pl->supported);
287 phylink_set(pl->supported, MII);
288 phylink_set(pl->supported, Autoneg);
289 phylink_set(pl->supported, Asym_Pause);
290 phylink_set(pl->supported, Pause);
291 pl->link_config.an_enabled = true;
292 pl->cfg_link_an_mode = MLO_AN_INBAND;
293
294 switch (pl->link_config.interface) {
295 case PHY_INTERFACE_MODE_SGMII:
296 case PHY_INTERFACE_MODE_QSGMII:
297 phylink_set(pl->supported, 10baseT_Half);
298 phylink_set(pl->supported, 10baseT_Full);
299 phylink_set(pl->supported, 100baseT_Half);
300 phylink_set(pl->supported, 100baseT_Full);
301 phylink_set(pl->supported, 1000baseT_Half);
302 phylink_set(pl->supported, 1000baseT_Full);
303 break;
304
305 case PHY_INTERFACE_MODE_1000BASEX:
306 phylink_set(pl->supported, 1000baseX_Full);
307 break;
308
309 case PHY_INTERFACE_MODE_2500BASEX:
310 phylink_set(pl->supported, 2500baseX_Full);
311 break;
312
313 case PHY_INTERFACE_MODE_5GBASER:
314 phylink_set(pl->supported, 5000baseT_Full);
315 break;
316
317 case PHY_INTERFACE_MODE_25GBASER:
318 phylink_set(pl->supported, 25000baseCR_Full);
319 phylink_set(pl->supported, 25000baseKR_Full);
320 phylink_set(pl->supported, 25000baseSR_Full);
321 fallthrough;
322 case PHY_INTERFACE_MODE_USXGMII:
323 case PHY_INTERFACE_MODE_10GKR:
324 case PHY_INTERFACE_MODE_10GBASER:
325 phylink_set(pl->supported, 10baseT_Half);
326 phylink_set(pl->supported, 10baseT_Full);
327 phylink_set(pl->supported, 100baseT_Half);
328 phylink_set(pl->supported, 100baseT_Full);
329 phylink_set(pl->supported, 1000baseT_Half);
330 phylink_set(pl->supported, 1000baseT_Full);
331 phylink_set(pl->supported, 1000baseX_Full);
332 phylink_set(pl->supported, 1000baseKX_Full);
333 phylink_set(pl->supported, 2500baseT_Full);
334 phylink_set(pl->supported, 2500baseX_Full);
335 phylink_set(pl->supported, 5000baseT_Full);
336 phylink_set(pl->supported, 10000baseT_Full);
337 phylink_set(pl->supported, 10000baseKR_Full);
338 phylink_set(pl->supported, 10000baseKX4_Full);
339 phylink_set(pl->supported, 10000baseCR_Full);
340 phylink_set(pl->supported, 10000baseSR_Full);
341 phylink_set(pl->supported, 10000baseLR_Full);
342 phylink_set(pl->supported, 10000baseLRM_Full);
343 phylink_set(pl->supported, 10000baseER_Full);
344 break;
345
346 case PHY_INTERFACE_MODE_XLGMII:
347 phylink_set(pl->supported, 25000baseCR_Full);
348 phylink_set(pl->supported, 25000baseKR_Full);
349 phylink_set(pl->supported, 25000baseSR_Full);
350 phylink_set(pl->supported, 40000baseKR4_Full);
351 phylink_set(pl->supported, 40000baseCR4_Full);
352 phylink_set(pl->supported, 40000baseSR4_Full);
353 phylink_set(pl->supported, 40000baseLR4_Full);
354 phylink_set(pl->supported, 50000baseCR2_Full);
355 phylink_set(pl->supported, 50000baseKR2_Full);
356 phylink_set(pl->supported, 50000baseSR2_Full);
357 phylink_set(pl->supported, 50000baseKR_Full);
358 phylink_set(pl->supported, 50000baseSR_Full);
359 phylink_set(pl->supported, 50000baseCR_Full);
360 phylink_set(pl->supported, 50000baseLR_ER_FR_Full);
361 phylink_set(pl->supported, 50000baseDR_Full);
362 phylink_set(pl->supported, 100000baseKR4_Full);
363 phylink_set(pl->supported, 100000baseSR4_Full);
364 phylink_set(pl->supported, 100000baseCR4_Full);
365 phylink_set(pl->supported, 100000baseLR4_ER4_Full);
366 phylink_set(pl->supported, 100000baseKR2_Full);
367 phylink_set(pl->supported, 100000baseSR2_Full);
368 phylink_set(pl->supported, 100000baseCR2_Full);
369 phylink_set(pl->supported, 100000baseLR2_ER2_FR2_Full);
370 phylink_set(pl->supported, 100000baseDR2_Full);
371 break;
372
373 default:
374 phylink_err(pl,
375 "incorrect link mode %s for in-band status\n",
376 phy_modes(pl->link_config.interface));
377 return -EINVAL;
378 }
379
380 linkmode_copy(pl->link_config.advertising, pl->supported);
381
382 if (phylink_validate(pl, pl->supported, &pl->link_config)) {
383 phylink_err(pl,
384 "failed to validate link configuration for in-band status\n");
385 return -EINVAL;
386 }
387
388 /* Check if MAC/PCS also supports Autoneg. */
389 pl->link_config.an_enabled = phylink_test(pl->supported, Autoneg);
390 }
391
392 return 0;
393}
394
395static void phylink_apply_manual_flow(struct phylink *pl,
396 struct phylink_link_state *state)
397{
398 /* If autoneg is disabled, pause AN is also disabled */
399 if (!state->an_enabled)
400 state->pause &= ~MLO_PAUSE_AN;
401
402 /* Manual configuration of pause modes */
403 if (!(pl->link_config.pause & MLO_PAUSE_AN))
404 state->pause = pl->link_config.pause;
405}
406
407static void phylink_resolve_flow(struct phylink_link_state *state)
408{
409 bool tx_pause, rx_pause;
410
411 state->pause = MLO_PAUSE_NONE;
412 if (state->duplex == DUPLEX_FULL) {
413 linkmode_resolve_pause(state->advertising,
414 state->lp_advertising,
415 &tx_pause, &rx_pause);
416 if (tx_pause)
417 state->pause |= MLO_PAUSE_TX;
418 if (rx_pause)
419 state->pause |= MLO_PAUSE_RX;
420 }
421}
422
423static void phylink_mac_config(struct phylink *pl,
424 const struct phylink_link_state *state)
425{
426 phylink_dbg(pl,
427 "%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n",
428 __func__, phylink_an_mode_str(pl->cur_link_an_mode),
429 phy_modes(state->interface),
430 phy_speed_to_str(state->speed),
431 phy_duplex_to_str(state->duplex),
432 __ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising,
433 state->pause, state->link, state->an_enabled);
434
435 pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, state);
436}
437
438static void phylink_mac_pcs_an_restart(struct phylink *pl)
439{
440 if (pl->link_config.an_enabled &&
441 phy_interface_mode_is_8023z(pl->link_config.interface) &&
442 phylink_autoneg_inband(pl->cur_link_an_mode)) {
443 if (pl->pcs_ops)
444 pl->pcs_ops->pcs_an_restart(pl->pcs);
445 else
446 pl->mac_ops->mac_an_restart(pl->config);
447 }
448}
449
450static void phylink_major_config(struct phylink *pl, bool restart,
451 const struct phylink_link_state *state)
452{
453 int err;
454
455 phylink_dbg(pl, "major config %s\n", phy_modes(state->interface));
456
457 if (pl->mac_ops->mac_prepare) {
458 err = pl->mac_ops->mac_prepare(pl->config, pl->cur_link_an_mode,
459 state->interface);
460 if (err < 0) {
461 phylink_err(pl, "mac_prepare failed: %pe\n",
462 ERR_PTR(err));
463 return;
464 }
465 }
466
467 phylink_mac_config(pl, state);
468
469 if (pl->pcs_ops) {
470 err = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode,
471 state->interface,
472 state->advertising,
473 !!(pl->link_config.pause &
474 MLO_PAUSE_AN));
475 if (err < 0)
476 phylink_err(pl, "pcs_config failed: %pe\n",
477 ERR_PTR(err));
478 if (err > 0)
479 restart = true;
480 }
481 if (restart)
482 phylink_mac_pcs_an_restart(pl);
483
484 if (pl->mac_ops->mac_finish) {
485 err = pl->mac_ops->mac_finish(pl->config, pl->cur_link_an_mode,
486 state->interface);
487 if (err < 0)
488 phylink_err(pl, "mac_finish failed: %pe\n",
489 ERR_PTR(err));
490 }
491}
492
493/*
494 * Reconfigure for a change of inband advertisement.
495 * If we have a separate PCS, we only need to call its pcs_config() method,
496 * and then restart AN if it indicates something changed. Otherwise, we do
497 * the full MAC reconfiguration.
498 */
499static int phylink_change_inband_advert(struct phylink *pl)
500{
501 int ret;
502
503 if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state))
504 return 0;
505
506 if (!pl->pcs_ops) {
507 /* Legacy method */
508 phylink_mac_config(pl, &pl->link_config);
509 phylink_mac_pcs_an_restart(pl);
510 return 0;
511 }
512
513 phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__,
514 phylink_an_mode_str(pl->cur_link_an_mode),
515 phy_modes(pl->link_config.interface),
516 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising,
517 pl->link_config.pause);
518
519 /* Modern PCS-based method; update the advert at the PCS, and
520 * restart negotiation if the pcs_config() helper indicates that
521 * the programmed advertisement has changed.
522 */
523 ret = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode,
524 pl->link_config.interface,
525 pl->link_config.advertising,
526 !!(pl->link_config.pause & MLO_PAUSE_AN));
527 if (ret < 0)
528 return ret;
529
530 if (ret > 0)
531 phylink_mac_pcs_an_restart(pl);
532
533 return 0;
534}
535
536static void phylink_mac_pcs_get_state(struct phylink *pl,
537 struct phylink_link_state *state)
538{
539 linkmode_copy(state->advertising, pl->link_config.advertising);
540 linkmode_zero(state->lp_advertising);
541 state->interface = pl->link_config.interface;
542 state->an_enabled = pl->link_config.an_enabled;
543 state->speed = SPEED_UNKNOWN;
544 state->duplex = DUPLEX_UNKNOWN;
545 state->pause = MLO_PAUSE_NONE;
546 state->an_complete = 0;
547 state->link = 1;
548
549 if (pl->pcs_ops)
550 pl->pcs_ops->pcs_get_state(pl->pcs, state);
551 else if (pl->mac_ops->mac_pcs_get_state)
552 pl->mac_ops->mac_pcs_get_state(pl->config, state);
553 else
554 state->link = 0;
555}
556
557/* The fixed state is... fixed except for the link state,
558 * which may be determined by a GPIO or a callback.
559 */
560static void phylink_get_fixed_state(struct phylink *pl,
561 struct phylink_link_state *state)
562{
563 *state = pl->link_config;
564 if (pl->config->get_fixed_state)
565 pl->config->get_fixed_state(pl->config, state);
566 else if (pl->link_gpio)
567 state->link = !!gpiod_get_value_cansleep(pl->link_gpio);
568
569 phylink_resolve_flow(state);
570}
571
572static void phylink_mac_initial_config(struct phylink *pl, bool force_restart)
573{
574 struct phylink_link_state link_state;
575
576 switch (pl->cur_link_an_mode) {
577 case MLO_AN_PHY:
578 link_state = pl->phy_state;
579 break;
580
581 case MLO_AN_FIXED:
582 phylink_get_fixed_state(pl, &link_state);
583 break;
584
585 case MLO_AN_INBAND:
586 link_state = pl->link_config;
587 if (link_state.interface == PHY_INTERFACE_MODE_SGMII)
588 link_state.pause = MLO_PAUSE_NONE;
589 break;
590
591 default: /* can't happen */
592 return;
593 }
594
595 link_state.link = false;
596
597 phylink_apply_manual_flow(pl, &link_state);
598 phylink_major_config(pl, force_restart, &link_state);
599}
600
601static const char *phylink_pause_to_str(int pause)
602{
603 switch (pause & MLO_PAUSE_TXRX_MASK) {
604 case MLO_PAUSE_TX | MLO_PAUSE_RX:
605 return "rx/tx";
606 case MLO_PAUSE_TX:
607 return "tx";
608 case MLO_PAUSE_RX:
609 return "rx";
610 default:
611 return "off";
612 }
613}
614
615static void phylink_link_up(struct phylink *pl,
616 struct phylink_link_state link_state)
617{
618 struct net_device *ndev = pl->netdev;
619
620 pl->cur_interface = link_state.interface;
621
622 if (pl->pcs_ops && pl->pcs_ops->pcs_link_up)
623 pl->pcs_ops->pcs_link_up(pl->pcs, pl->cur_link_an_mode,
624 pl->cur_interface,
625 link_state.speed, link_state.duplex);
626
627 pl->mac_ops->mac_link_up(pl->config, pl->phydev,
628 pl->cur_link_an_mode, pl->cur_interface,
629 link_state.speed, link_state.duplex,
630 !!(link_state.pause & MLO_PAUSE_TX),
631 !!(link_state.pause & MLO_PAUSE_RX));
632
633 if (ndev)
634 netif_carrier_on(ndev);
635
636 phylink_info(pl,
637 "Link is Up - %s/%s - flow control %s\n",
638 phy_speed_to_str(link_state.speed),
639 phy_duplex_to_str(link_state.duplex),
640 phylink_pause_to_str(link_state.pause));
641}
642
643static void phylink_link_down(struct phylink *pl)
644{
645 struct net_device *ndev = pl->netdev;
646
647 if (ndev)
648 netif_carrier_off(ndev);
649 pl->mac_ops->mac_link_down(pl->config, pl->cur_link_an_mode,
650 pl->cur_interface);
651 phylink_info(pl, "Link is Down\n");
652}
653
654static void phylink_resolve(struct work_struct *w)
655{
656 struct phylink *pl = container_of(w, struct phylink, resolve);
657 struct phylink_link_state link_state;
658 struct net_device *ndev = pl->netdev;
659 bool mac_config = false;
660 bool cur_link_state;
661
662 mutex_lock(&pl->state_mutex);
663 if (pl->netdev)
664 cur_link_state = netif_carrier_ok(ndev);
665 else
666 cur_link_state = pl->old_link_state;
667
668 if (pl->phylink_disable_state) {
669 pl->mac_link_dropped = false;
670 link_state.link = false;
671 } else if (pl->mac_link_dropped) {
672 link_state.link = false;
673 } else {
674 switch (pl->cur_link_an_mode) {
675 case MLO_AN_PHY:
676 link_state = pl->phy_state;
677 phylink_apply_manual_flow(pl, &link_state);
678 mac_config = link_state.link;
679 break;
680
681 case MLO_AN_FIXED:
682 phylink_get_fixed_state(pl, &link_state);
683 mac_config = link_state.link;
684 break;
685
686 case MLO_AN_INBAND:
687 phylink_mac_pcs_get_state(pl, &link_state);
688
689 /* If we have a phy, the "up" state is the union of
690 * both the PHY and the MAC
691 */
692 if (pl->phydev)
693 link_state.link &= pl->phy_state.link;
694
695 /* Only update if the PHY link is up */
696 if (pl->phydev && pl->phy_state.link) {
697 link_state.interface = pl->phy_state.interface;
698
699 /* If we have a PHY, we need to update with
700 * the PHY flow control bits.
701 */
702 link_state.pause = pl->phy_state.pause;
703 mac_config = true;
704 }
705 phylink_apply_manual_flow(pl, &link_state);
706 break;
707 }
708 }
709
710 if (mac_config) {
711 if (link_state.interface != pl->link_config.interface) {
712 /* The interface has changed, force the link down and
713 * then reconfigure.
714 */
715 if (cur_link_state) {
716 phylink_link_down(pl);
717 cur_link_state = false;
718 }
719 phylink_major_config(pl, false, &link_state);
720 pl->link_config.interface = link_state.interface;
721 } else if (!pl->pcs_ops) {
722 /* The interface remains unchanged, only the speed,
723 * duplex or pause settings have changed. Call the
724 * old mac_config() method to configure the MAC/PCS
725 * only if we do not have a PCS installed (an
726 * unconverted user.)
727 */
728 phylink_mac_config(pl, &link_state);
729 }
730 }
731
732 if (link_state.link != cur_link_state) {
733 pl->old_link_state = link_state.link;
734 if (!link_state.link)
735 phylink_link_down(pl);
736 else
737 phylink_link_up(pl, link_state);
738 }
739 if (!link_state.link && pl->mac_link_dropped) {
740 pl->mac_link_dropped = false;
741 queue_work(system_power_efficient_wq, &pl->resolve);
742 }
743 mutex_unlock(&pl->state_mutex);
744}
745
746static void phylink_run_resolve(struct phylink *pl)
747{
748 if (!pl->phylink_disable_state)
749 queue_work(system_power_efficient_wq, &pl->resolve);
750}
751
752static void phylink_run_resolve_and_disable(struct phylink *pl, int bit)
753{
754 unsigned long state = pl->phylink_disable_state;
755
756 set_bit(bit, &pl->phylink_disable_state);
757 if (state == 0) {
758 queue_work(system_power_efficient_wq, &pl->resolve);
759 flush_work(&pl->resolve);
760 }
761}
762
763static void phylink_fixed_poll(struct timer_list *t)
764{
765 struct phylink *pl = container_of(t, struct phylink, link_poll);
766
767 mod_timer(t, jiffies + HZ);
768
769 phylink_run_resolve(pl);
770}
771
772static const struct sfp_upstream_ops sfp_phylink_ops;
773
774static int phylink_register_sfp(struct phylink *pl,
775 struct fwnode_handle *fwnode)
776{
777 struct sfp_bus *bus;
778 int ret;
779
780 if (!fwnode)
781 return 0;
782
783 bus = sfp_bus_find_fwnode(fwnode);
784 if (IS_ERR(bus)) {
785 ret = PTR_ERR(bus);
786 phylink_err(pl, "unable to attach SFP bus: %d\n", ret);
787 return ret;
788 }
789
790 pl->sfp_bus = bus;
791
792 ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops);
793 sfp_bus_put(bus);
794
795 return ret;
796}
797
798/**
799 * phylink_create() - create a phylink instance
800 * @config: a pointer to the target &struct phylink_config
801 * @fwnode: a pointer to a &struct fwnode_handle describing the network
802 * interface
803 * @iface: the desired link mode defined by &typedef phy_interface_t
804 * @mac_ops: a pointer to a &struct phylink_mac_ops for the MAC.
805 *
806 * Create a new phylink instance, and parse the link parameters found in @np.
807 * This will parse in-band modes, fixed-link or SFP configuration.
808 *
809 * Note: the rtnl lock must not be held when calling this function.
810 *
811 * Returns a pointer to a &struct phylink, or an error-pointer value. Users
812 * must use IS_ERR() to check for errors from this function.
813 */
814struct phylink *phylink_create(struct phylink_config *config,
815 struct fwnode_handle *fwnode,
816 phy_interface_t iface,
817 const struct phylink_mac_ops *mac_ops)
818{
819 struct phylink *pl;
820 int ret;
821
822 pl = kzalloc(sizeof(*pl), GFP_KERNEL);
823 if (!pl)
824 return ERR_PTR(-ENOMEM);
825
826 mutex_init(&pl->state_mutex);
827 INIT_WORK(&pl->resolve, phylink_resolve);
828
829 pl->config = config;
830 if (config->type == PHYLINK_NETDEV) {
831 pl->netdev = to_net_dev(config->dev);
832 } else if (config->type == PHYLINK_DEV) {
833 pl->dev = config->dev;
834 } else {
835 kfree(pl);
836 return ERR_PTR(-EINVAL);
837 }
838
839 pl->phy_state.interface = iface;
840 pl->link_interface = iface;
841 if (iface == PHY_INTERFACE_MODE_MOCA)
842 pl->link_port = PORT_BNC;
843 else
844 pl->link_port = PORT_MII;
845 pl->link_config.interface = iface;
846 pl->link_config.pause = MLO_PAUSE_AN;
847 pl->link_config.speed = SPEED_UNKNOWN;
848 pl->link_config.duplex = DUPLEX_UNKNOWN;
849 pl->link_config.an_enabled = true;
850 pl->mac_ops = mac_ops;
851 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
852 timer_setup(&pl->link_poll, phylink_fixed_poll, 0);
853
854 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
855 linkmode_copy(pl->link_config.advertising, pl->supported);
856 phylink_validate(pl, pl->supported, &pl->link_config);
857
858 ret = phylink_parse_mode(pl, fwnode);
859 if (ret < 0) {
860 kfree(pl);
861 return ERR_PTR(ret);
862 }
863
864 if (pl->cfg_link_an_mode == MLO_AN_FIXED) {
865 ret = phylink_parse_fixedlink(pl, fwnode);
866 if (ret < 0) {
867 kfree(pl);
868 return ERR_PTR(ret);
869 }
870 }
871
872 pl->cur_link_an_mode = pl->cfg_link_an_mode;
873
874 ret = phylink_register_sfp(pl, fwnode);
875 if (ret < 0) {
876 kfree(pl);
877 return ERR_PTR(ret);
878 }
879
880 return pl;
881}
882EXPORT_SYMBOL_GPL(phylink_create);
883
884/**
885 * phylink_set_pcs() - set the current PCS for phylink to use
886 * @pl: a pointer to a &struct phylink returned from phylink_create()
887 * @pcs: a pointer to the &struct phylink_pcs
888 *
889 * Bind the MAC PCS to phylink. This may be called after phylink_create(),
890 * in mac_prepare() or mac_config() methods if it is desired to dynamically
891 * change the PCS.
892 *
893 * Please note that there are behavioural changes with the mac_config()
894 * callback if a PCS is present (denoting a newer setup) so removing a PCS
895 * is not supported, and if a PCS is going to be used, it must be registered
896 * by calling phylink_set_pcs() at the latest in the first mac_config() call.
897 */
898void phylink_set_pcs(struct phylink *pl, struct phylink_pcs *pcs)
899{
900 pl->pcs = pcs;
901 pl->pcs_ops = pcs->ops;
902}
903EXPORT_SYMBOL_GPL(phylink_set_pcs);
904
905/**
906 * phylink_destroy() - cleanup and destroy the phylink instance
907 * @pl: a pointer to a &struct phylink returned from phylink_create()
908 *
909 * Destroy a phylink instance. Any PHY that has been attached must have been
910 * cleaned up via phylink_disconnect_phy() prior to calling this function.
911 *
912 * Note: the rtnl lock must not be held when calling this function.
913 */
914void phylink_destroy(struct phylink *pl)
915{
916 sfp_bus_del_upstream(pl->sfp_bus);
917 if (pl->link_gpio)
918 gpiod_put(pl->link_gpio);
919
920 cancel_work_sync(&pl->resolve);
921 kfree(pl);
922}
923EXPORT_SYMBOL_GPL(phylink_destroy);
924
925static void phylink_phy_change(struct phy_device *phydev, bool up)
926{
927 struct phylink *pl = phydev->phylink;
928 bool tx_pause, rx_pause;
929
930 phy_get_pause(phydev, &tx_pause, &rx_pause);
931
932 mutex_lock(&pl->state_mutex);
933 pl->phy_state.speed = phydev->speed;
934 pl->phy_state.duplex = phydev->duplex;
935 pl->phy_state.pause = MLO_PAUSE_NONE;
936 if (tx_pause)
937 pl->phy_state.pause |= MLO_PAUSE_TX;
938 if (rx_pause)
939 pl->phy_state.pause |= MLO_PAUSE_RX;
940 pl->phy_state.interface = phydev->interface;
941 pl->phy_state.link = up;
942 mutex_unlock(&pl->state_mutex);
943
944 phylink_run_resolve(pl);
945
946 phylink_dbg(pl, "phy link %s %s/%s/%s\n", up ? "up" : "down",
947 phy_modes(phydev->interface),
948 phy_speed_to_str(phydev->speed),
949 phy_duplex_to_str(phydev->duplex));
950}
951
952static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy,
953 phy_interface_t interface)
954{
955 struct phylink_link_state config;
956 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
957 char *irq_str;
958 int ret;
959
960 /*
961 * This is the new way of dealing with flow control for PHYs,
962 * as described by Timur Tabi in commit 529ed1275263 ("net: phy:
963 * phy drivers should not set SUPPORTED_[Asym_]Pause") except
964 * using our validate call to the MAC, we rely upon the MAC
965 * clearing the bits from both supported and advertising fields.
966 */
967 phy_support_asym_pause(phy);
968
969 memset(&config, 0, sizeof(config));
970 linkmode_copy(supported, phy->supported);
971 linkmode_copy(config.advertising, phy->advertising);
972
973 /* Clause 45 PHYs switch their Serdes lane between several different
974 * modes, normally 10GBASE-R, SGMII. Some use 2500BASE-X for 2.5G
975 * speeds. We really need to know which interface modes the PHY and
976 * MAC supports to properly work out which linkmodes can be supported.
977 */
978 if (phy->is_c45 &&
979 interface != PHY_INTERFACE_MODE_RXAUI &&
980 interface != PHY_INTERFACE_MODE_XAUI &&
981 interface != PHY_INTERFACE_MODE_USXGMII)
982 config.interface = PHY_INTERFACE_MODE_NA;
983 else
984 config.interface = interface;
985
986 ret = phylink_validate(pl, supported, &config);
987 if (ret) {
988 phylink_warn(pl, "validation of %s with support %*pb and advertisement %*pb failed: %d\n",
989 phy_modes(config.interface),
990 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->supported,
991 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising,
992 ret);
993 return ret;
994 }
995
996 phy->phylink = pl;
997 phy->phy_link_change = phylink_phy_change;
998
999 irq_str = phy_attached_info_irq(phy);
1000 phylink_info(pl,
1001 "PHY [%s] driver [%s] (irq=%s)\n",
1002 dev_name(&phy->mdio.dev), phy->drv->name, irq_str);
1003 kfree(irq_str);
1004
1005 mutex_lock(&phy->lock);
1006 mutex_lock(&pl->state_mutex);
1007 pl->phydev = phy;
1008 pl->phy_state.interface = interface;
1009 pl->phy_state.pause = MLO_PAUSE_NONE;
1010 pl->phy_state.speed = SPEED_UNKNOWN;
1011 pl->phy_state.duplex = DUPLEX_UNKNOWN;
1012 linkmode_copy(pl->supported, supported);
1013 linkmode_copy(pl->link_config.advertising, config.advertising);
1014
1015 /* Restrict the phy advertisement according to the MAC support. */
1016 linkmode_copy(phy->advertising, config.advertising);
1017 mutex_unlock(&pl->state_mutex);
1018 mutex_unlock(&phy->lock);
1019
1020 phylink_dbg(pl,
1021 "phy: setting supported %*pb advertising %*pb\n",
1022 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported,
1023 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising);
1024
1025 if (phy_interrupt_is_valid(phy))
1026 phy_request_interrupt(phy);
1027
1028 return 0;
1029}
1030
1031static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy,
1032 phy_interface_t interface)
1033{
1034 if (WARN_ON(pl->cfg_link_an_mode == MLO_AN_FIXED ||
1035 (pl->cfg_link_an_mode == MLO_AN_INBAND &&
1036 phy_interface_mode_is_8023z(interface))))
1037 return -EINVAL;
1038
1039 if (pl->phydev)
1040 return -EBUSY;
1041
1042 return phy_attach_direct(pl->netdev, phy, 0, interface);
1043}
1044
1045/**
1046 * phylink_connect_phy() - connect a PHY to the phylink instance
1047 * @pl: a pointer to a &struct phylink returned from phylink_create()
1048 * @phy: a pointer to a &struct phy_device.
1049 *
1050 * Connect @phy to the phylink instance specified by @pl by calling
1051 * phy_attach_direct(). Configure the @phy according to the MAC driver's
1052 * capabilities, start the PHYLIB state machine and enable any interrupts
1053 * that the PHY supports.
1054 *
1055 * This updates the phylink's ethtool supported and advertising link mode
1056 * masks.
1057 *
1058 * Returns 0 on success or a negative errno.
1059 */
1060int phylink_connect_phy(struct phylink *pl, struct phy_device *phy)
1061{
1062 int ret;
1063
1064 /* Use PHY device/driver interface */
1065 if (pl->link_interface == PHY_INTERFACE_MODE_NA) {
1066 pl->link_interface = phy->interface;
1067 pl->link_config.interface = pl->link_interface;
1068 }
1069
1070 ret = phylink_attach_phy(pl, phy, pl->link_interface);
1071 if (ret < 0)
1072 return ret;
1073
1074 ret = phylink_bringup_phy(pl, phy, pl->link_config.interface);
1075 if (ret)
1076 phy_detach(phy);
1077
1078 return ret;
1079}
1080EXPORT_SYMBOL_GPL(phylink_connect_phy);
1081
1082/**
1083 * phylink_of_phy_connect() - connect the PHY specified in the DT mode.
1084 * @pl: a pointer to a &struct phylink returned from phylink_create()
1085 * @dn: a pointer to a &struct device_node.
1086 * @flags: PHY-specific flags to communicate to the PHY device driver
1087 *
1088 * Connect the phy specified in the device node @dn to the phylink instance
1089 * specified by @pl. Actions specified in phylink_connect_phy() will be
1090 * performed.
1091 *
1092 * Returns 0 on success or a negative errno.
1093 */
1094int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn,
1095 u32 flags)
1096{
1097 return phylink_fwnode_phy_connect(pl, of_fwnode_handle(dn), flags);
1098}
1099EXPORT_SYMBOL_GPL(phylink_of_phy_connect);
1100
1101/**
1102 * phylink_fwnode_phy_connect() - connect the PHY specified in the fwnode.
1103 * @pl: a pointer to a &struct phylink returned from phylink_create()
1104 * @fwnode: a pointer to a &struct fwnode_handle.
1105 * @flags: PHY-specific flags to communicate to the PHY device driver
1106 *
1107 * Connect the phy specified @fwnode to the phylink instance specified
1108 * by @pl.
1109 *
1110 * Returns 0 on success or a negative errno.
1111 */
1112int phylink_fwnode_phy_connect(struct phylink *pl,
1113 struct fwnode_handle *fwnode,
1114 u32 flags)
1115{
1116 struct fwnode_handle *phy_fwnode;
1117 struct phy_device *phy_dev;
1118 int ret;
1119
1120 /* Fixed links and 802.3z are handled without needing a PHY */
1121 if (pl->cfg_link_an_mode == MLO_AN_FIXED ||
1122 (pl->cfg_link_an_mode == MLO_AN_INBAND &&
1123 phy_interface_mode_is_8023z(pl->link_interface)))
1124 return 0;
1125
1126 phy_fwnode = fwnode_get_phy_node(fwnode);
1127 if (IS_ERR(phy_fwnode)) {
1128 if (pl->cfg_link_an_mode == MLO_AN_PHY)
1129 return -ENODEV;
1130 return 0;
1131 }
1132
1133 phy_dev = fwnode_phy_find_device(phy_fwnode);
1134 /* We're done with the phy_node handle */
1135 fwnode_handle_put(phy_fwnode);
1136 if (!phy_dev)
1137 return -ENODEV;
1138
1139 ret = phy_attach_direct(pl->netdev, phy_dev, flags,
1140 pl->link_interface);
1141 if (ret) {
1142 phy_device_free(phy_dev);
1143 return ret;
1144 }
1145
1146 ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface);
1147 if (ret)
1148 phy_detach(phy_dev);
1149
1150 return ret;
1151}
1152EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect);
1153
1154/**
1155 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink
1156 * instance.
1157 * @pl: a pointer to a &struct phylink returned from phylink_create()
1158 *
1159 * Disconnect any current PHY from the phylink instance described by @pl.
1160 */
1161void phylink_disconnect_phy(struct phylink *pl)
1162{
1163 struct phy_device *phy;
1164
1165 ASSERT_RTNL();
1166
1167 phy = pl->phydev;
1168 if (phy) {
1169 mutex_lock(&phy->lock);
1170 mutex_lock(&pl->state_mutex);
1171 pl->phydev = NULL;
1172 mutex_unlock(&pl->state_mutex);
1173 mutex_unlock(&phy->lock);
1174 flush_work(&pl->resolve);
1175
1176 phy_disconnect(phy);
1177 }
1178}
1179EXPORT_SYMBOL_GPL(phylink_disconnect_phy);
1180
1181/**
1182 * phylink_mac_change() - notify phylink of a change in MAC state
1183 * @pl: a pointer to a &struct phylink returned from phylink_create()
1184 * @up: indicates whether the link is currently up.
1185 *
1186 * The MAC driver should call this driver when the state of its link
1187 * changes (eg, link failure, new negotiation results, etc.)
1188 */
1189void phylink_mac_change(struct phylink *pl, bool up)
1190{
1191 if (!up)
1192 pl->mac_link_dropped = true;
1193 phylink_run_resolve(pl);
1194 phylink_dbg(pl, "mac link %s\n", up ? "up" : "down");
1195}
1196EXPORT_SYMBOL_GPL(phylink_mac_change);
1197
1198static irqreturn_t phylink_link_handler(int irq, void *data)
1199{
1200 struct phylink *pl = data;
1201
1202 phylink_run_resolve(pl);
1203
1204 return IRQ_HANDLED;
1205}
1206
1207/**
1208 * phylink_start() - start a phylink instance
1209 * @pl: a pointer to a &struct phylink returned from phylink_create()
1210 *
1211 * Start the phylink instance specified by @pl, configuring the MAC for the
1212 * desired link mode(s) and negotiation style. This should be called from the
1213 * network device driver's &struct net_device_ops ndo_open() method.
1214 */
1215void phylink_start(struct phylink *pl)
1216{
1217 bool poll = false;
1218
1219 ASSERT_RTNL();
1220
1221 phylink_info(pl, "configuring for %s/%s link mode\n",
1222 phylink_an_mode_str(pl->cur_link_an_mode),
1223 phy_modes(pl->link_config.interface));
1224
1225 /* Always set the carrier off */
1226 if (pl->netdev)
1227 netif_carrier_off(pl->netdev);
1228
1229 /* Apply the link configuration to the MAC when starting. This allows
1230 * a fixed-link to start with the correct parameters, and also
1231 * ensures that we set the appropriate advertisement for Serdes links.
1232 *
1233 * Restart autonegotiation if using 802.3z to ensure that the link
1234 * parameters are properly negotiated. This is necessary for DSA
1235 * switches using 802.3z negotiation to ensure they see our modes.
1236 */
1237 phylink_mac_initial_config(pl, true);
1238
1239 clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
1240 phylink_run_resolve(pl);
1241
1242 if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) {
1243 int irq = gpiod_to_irq(pl->link_gpio);
1244
1245 if (irq > 0) {
1246 if (!request_irq(irq, phylink_link_handler,
1247 IRQF_TRIGGER_RISING |
1248 IRQF_TRIGGER_FALLING,
1249 "netdev link", pl))
1250 pl->link_irq = irq;
1251 else
1252 irq = 0;
1253 }
1254 if (irq <= 0)
1255 poll = true;
1256 }
1257
1258 switch (pl->cfg_link_an_mode) {
1259 case MLO_AN_FIXED:
1260 poll |= pl->config->poll_fixed_state;
1261 break;
1262 case MLO_AN_INBAND:
1263 poll |= pl->config->pcs_poll;
1264 if (pl->pcs)
1265 poll |= pl->pcs->poll;
1266 break;
1267 }
1268 if (poll)
1269 mod_timer(&pl->link_poll, jiffies + HZ);
1270 if (pl->phydev)
1271 phy_start(pl->phydev);
1272 if (pl->sfp_bus)
1273 sfp_upstream_start(pl->sfp_bus);
1274}
1275EXPORT_SYMBOL_GPL(phylink_start);
1276
1277/**
1278 * phylink_stop() - stop a phylink instance
1279 * @pl: a pointer to a &struct phylink returned from phylink_create()
1280 *
1281 * Stop the phylink instance specified by @pl. This should be called from the
1282 * network device driver's &struct net_device_ops ndo_stop() method. The
1283 * network device's carrier state should not be changed prior to calling this
1284 * function.
1285 *
1286 * This will synchronously bring down the link if the link is not already
1287 * down (in other words, it will trigger a mac_link_down() method call.)
1288 */
1289void phylink_stop(struct phylink *pl)
1290{
1291 ASSERT_RTNL();
1292
1293 if (pl->sfp_bus)
1294 sfp_upstream_stop(pl->sfp_bus);
1295 if (pl->phydev)
1296 phy_stop(pl->phydev);
1297 del_timer_sync(&pl->link_poll);
1298 if (pl->link_irq) {
1299 free_irq(pl->link_irq, pl);
1300 pl->link_irq = 0;
1301 }
1302
1303 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED);
1304}
1305EXPORT_SYMBOL_GPL(phylink_stop);
1306
1307/**
1308 * phylink_suspend() - handle a network device suspend event
1309 * @pl: a pointer to a &struct phylink returned from phylink_create()
1310 * @mac_wol: true if the MAC needs to receive packets for Wake-on-Lan
1311 *
1312 * Handle a network device suspend event. There are several cases:
1313 * - If Wake-on-Lan is not active, we can bring down the link between
1314 * the MAC and PHY by calling phylink_stop().
1315 * - If Wake-on-Lan is active, and being handled only by the PHY, we
1316 * can also bring down the link between the MAC and PHY.
1317 * - If Wake-on-Lan is active, but being handled by the MAC, the MAC
1318 * still needs to receive packets, so we can not bring the link down.
1319 */
1320void phylink_suspend(struct phylink *pl, bool mac_wol)
1321{
1322 ASSERT_RTNL();
1323
1324 if (mac_wol && (!pl->netdev || pl->netdev->wol_enabled)) {
1325 /* Wake-on-Lan enabled, MAC handling */
1326 mutex_lock(&pl->state_mutex);
1327
1328 /* Stop the resolver bringing the link up */
1329 __set_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state);
1330
1331 /* Disable the carrier, to prevent transmit timeouts,
1332 * but one would hope all packets have been sent. This
1333 * also means phylink_resolve() will do nothing.
1334 */
1335 netif_carrier_off(pl->netdev);
1336
1337 /* We do not call mac_link_down() here as we want the
1338 * link to remain up to receive the WoL packets.
1339 */
1340 mutex_unlock(&pl->state_mutex);
1341 } else {
1342 phylink_stop(pl);
1343 }
1344}
1345EXPORT_SYMBOL_GPL(phylink_suspend);
1346
1347/**
1348 * phylink_resume() - handle a network device resume event
1349 * @pl: a pointer to a &struct phylink returned from phylink_create()
1350 *
1351 * Undo the effects of phylink_suspend(), returning the link to an
1352 * operational state.
1353 */
1354void phylink_resume(struct phylink *pl)
1355{
1356 ASSERT_RTNL();
1357
1358 if (test_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state)) {
1359 /* Wake-on-Lan enabled, MAC handling */
1360
1361 /* Call mac_link_down() so we keep the overall state balanced.
1362 * Do this under the state_mutex lock for consistency. This
1363 * will cause a "Link Down" message to be printed during
1364 * resume, which is harmless - the true link state will be
1365 * printed when we run a resolve.
1366 */
1367 mutex_lock(&pl->state_mutex);
1368 phylink_link_down(pl);
1369 mutex_unlock(&pl->state_mutex);
1370
1371 /* Re-apply the link parameters so that all the settings get
1372 * restored to the MAC.
1373 */
1374 phylink_mac_initial_config(pl, true);
1375
1376 /* Re-enable and re-resolve the link parameters */
1377 clear_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state);
1378 phylink_run_resolve(pl);
1379 } else {
1380 phylink_start(pl);
1381 }
1382}
1383EXPORT_SYMBOL_GPL(phylink_resume);
1384
1385/**
1386 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY
1387 * @pl: a pointer to a &struct phylink returned from phylink_create()
1388 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters
1389 *
1390 * Read the wake on lan parameters from the PHY attached to the phylink
1391 * instance specified by @pl. If no PHY is currently attached, report no
1392 * support for wake on lan.
1393 */
1394void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
1395{
1396 ASSERT_RTNL();
1397
1398 wol->supported = 0;
1399 wol->wolopts = 0;
1400
1401 if (pl->phydev)
1402 phy_ethtool_get_wol(pl->phydev, wol);
1403}
1404EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol);
1405
1406/**
1407 * phylink_ethtool_set_wol() - set wake on lan parameters
1408 * @pl: a pointer to a &struct phylink returned from phylink_create()
1409 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters
1410 *
1411 * Set the wake on lan parameters for the PHY attached to the phylink
1412 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP
1413 * error.
1414 *
1415 * Returns zero on success or negative errno code.
1416 */
1417int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
1418{
1419 int ret = -EOPNOTSUPP;
1420
1421 ASSERT_RTNL();
1422
1423 if (pl->phydev)
1424 ret = phy_ethtool_set_wol(pl->phydev, wol);
1425
1426 return ret;
1427}
1428EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol);
1429
1430static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b)
1431{
1432 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask);
1433
1434 linkmode_zero(mask);
1435 phylink_set_port_modes(mask);
1436
1437 linkmode_and(dst, dst, mask);
1438 linkmode_or(dst, dst, b);
1439}
1440
1441static void phylink_get_ksettings(const struct phylink_link_state *state,
1442 struct ethtool_link_ksettings *kset)
1443{
1444 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising);
1445 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising);
1446 kset->base.speed = state->speed;
1447 kset->base.duplex = state->duplex;
1448 kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE :
1449 AUTONEG_DISABLE;
1450}
1451
1452/**
1453 * phylink_ethtool_ksettings_get() - get the current link settings
1454 * @pl: a pointer to a &struct phylink returned from phylink_create()
1455 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings
1456 *
1457 * Read the current link settings for the phylink instance specified by @pl.
1458 * This will be the link settings read from the MAC, PHY or fixed link
1459 * settings depending on the current negotiation mode.
1460 */
1461int phylink_ethtool_ksettings_get(struct phylink *pl,
1462 struct ethtool_link_ksettings *kset)
1463{
1464 struct phylink_link_state link_state;
1465
1466 ASSERT_RTNL();
1467
1468 if (pl->phydev)
1469 phy_ethtool_ksettings_get(pl->phydev, kset);
1470 else
1471 kset->base.port = pl->link_port;
1472
1473 linkmode_copy(kset->link_modes.supported, pl->supported);
1474
1475 switch (pl->cur_link_an_mode) {
1476 case MLO_AN_FIXED:
1477 /* We are using fixed settings. Report these as the
1478 * current link settings - and note that these also
1479 * represent the supported speeds/duplex/pause modes.
1480 */
1481 phylink_get_fixed_state(pl, &link_state);
1482 phylink_get_ksettings(&link_state, kset);
1483 break;
1484
1485 case MLO_AN_INBAND:
1486 /* If there is a phy attached, then use the reported
1487 * settings from the phy with no modification.
1488 */
1489 if (pl->phydev)
1490 break;
1491
1492 phylink_mac_pcs_get_state(pl, &link_state);
1493
1494 /* The MAC is reporting the link results from its own PCS
1495 * layer via in-band status. Report these as the current
1496 * link settings.
1497 */
1498 phylink_get_ksettings(&link_state, kset);
1499 break;
1500 }
1501
1502 return 0;
1503}
1504EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get);
1505
1506/**
1507 * phylink_ethtool_ksettings_set() - set the link settings
1508 * @pl: a pointer to a &struct phylink returned from phylink_create()
1509 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes
1510 */
1511int phylink_ethtool_ksettings_set(struct phylink *pl,
1512 const struct ethtool_link_ksettings *kset)
1513{
1514 __ETHTOOL_DECLARE_LINK_MODE_MASK(support);
1515 struct phylink_link_state config;
1516 const struct phy_setting *s;
1517
1518 ASSERT_RTNL();
1519
1520 if (pl->phydev) {
1521 /* We can rely on phylib for this update; we also do not need
1522 * to update the pl->link_config settings:
1523 * - the configuration returned via ksettings_get() will come
1524 * from phylib whenever a PHY is present.
1525 * - link_config.interface will be updated by the PHY calling
1526 * back via phylink_phy_change() and a subsequent resolve.
1527 * - initial link configuration for PHY mode comes from the
1528 * last phy state updated via phylink_phy_change().
1529 * - other configuration changes (e.g. pause modes) are
1530 * performed directly via phylib.
1531 * - if in in-band mode with a PHY, the link configuration
1532 * is passed on the link from the PHY, and all of
1533 * link_config.{speed,duplex,an_enabled,pause} are not used.
1534 * - the only possible use would be link_config.advertising
1535 * pause modes when in 1000base-X mode with a PHY, but in
1536 * the presence of a PHY, this should not be changed as that
1537 * should be determined from the media side advertisement.
1538 */
1539 return phy_ethtool_ksettings_set(pl->phydev, kset);
1540 }
1541
1542 linkmode_copy(support, pl->supported);
1543 config = pl->link_config;
1544 config.an_enabled = kset->base.autoneg == AUTONEG_ENABLE;
1545
1546 /* Mask out unsupported advertisements, and force the autoneg bit */
1547 linkmode_and(config.advertising, kset->link_modes.advertising,
1548 support);
1549 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising,
1550 config.an_enabled);
1551
1552 /* FIXME: should we reject autoneg if phy/mac does not support it? */
1553 switch (kset->base.autoneg) {
1554 case AUTONEG_DISABLE:
1555 /* Autonegotiation disabled, select a suitable speed and
1556 * duplex.
1557 */
1558 s = phy_lookup_setting(kset->base.speed, kset->base.duplex,
1559 support, false);
1560 if (!s)
1561 return -EINVAL;
1562
1563 /* If we have a fixed link, refuse to change link parameters.
1564 * If the link parameters match, accept them but do nothing.
1565 */
1566 if (pl->cur_link_an_mode == MLO_AN_FIXED) {
1567 if (s->speed != pl->link_config.speed ||
1568 s->duplex != pl->link_config.duplex)
1569 return -EINVAL;
1570 return 0;
1571 }
1572
1573 config.speed = s->speed;
1574 config.duplex = s->duplex;
1575 break;
1576
1577 case AUTONEG_ENABLE:
1578 /* If we have a fixed link, allow autonegotiation (since that
1579 * is our default case) but do not allow the advertisement to
1580 * be changed. If the advertisement matches, simply return.
1581 */
1582 if (pl->cur_link_an_mode == MLO_AN_FIXED) {
1583 if (!linkmode_equal(config.advertising,
1584 pl->link_config.advertising))
1585 return -EINVAL;
1586 return 0;
1587 }
1588
1589 config.speed = SPEED_UNKNOWN;
1590 config.duplex = DUPLEX_UNKNOWN;
1591 break;
1592
1593 default:
1594 return -EINVAL;
1595 }
1596
1597 /* We have ruled out the case with a PHY attached, and the
1598 * fixed-link cases. All that is left are in-band links.
1599 */
1600 if (phylink_validate(pl, support, &config))
1601 return -EINVAL;
1602
1603 /* If autonegotiation is enabled, we must have an advertisement */
1604 if (config.an_enabled && phylink_is_empty_linkmode(config.advertising))
1605 return -EINVAL;
1606
1607 /* If this link is with an SFP, ensure that changes to advertised modes
1608 * also cause the associated interface to be selected such that the
1609 * link can be configured correctly.
1610 */
1611 if (pl->sfp_port && pl->sfp_bus) {
1612 config.interface = sfp_select_interface(pl->sfp_bus,
1613 config.advertising);
1614 if (config.interface == PHY_INTERFACE_MODE_NA) {
1615 phylink_err(pl,
1616 "selection of interface failed, advertisement %*pb\n",
1617 __ETHTOOL_LINK_MODE_MASK_NBITS,
1618 config.advertising);
1619 return -EINVAL;
1620 }
1621
1622 /* Revalidate with the selected interface */
1623 linkmode_copy(support, pl->supported);
1624 if (phylink_validate(pl, support, &config)) {
1625 phylink_err(pl, "validation of %s/%s with support %*pb failed\n",
1626 phylink_an_mode_str(pl->cur_link_an_mode),
1627 phy_modes(config.interface),
1628 __ETHTOOL_LINK_MODE_MASK_NBITS, support);
1629 return -EINVAL;
1630 }
1631 }
1632
1633 mutex_lock(&pl->state_mutex);
1634 pl->link_config.speed = config.speed;
1635 pl->link_config.duplex = config.duplex;
1636 pl->link_config.an_enabled = config.an_enabled;
1637
1638 if (pl->link_config.interface != config.interface) {
1639 /* The interface changed, e.g. 1000base-X <-> 2500base-X */
1640 /* We need to force the link down, then change the interface */
1641 if (pl->old_link_state) {
1642 phylink_link_down(pl);
1643 pl->old_link_state = false;
1644 }
1645 if (!test_bit(PHYLINK_DISABLE_STOPPED,
1646 &pl->phylink_disable_state))
1647 phylink_major_config(pl, false, &config);
1648 pl->link_config.interface = config.interface;
1649 linkmode_copy(pl->link_config.advertising, config.advertising);
1650 } else if (!linkmode_equal(pl->link_config.advertising,
1651 config.advertising)) {
1652 linkmode_copy(pl->link_config.advertising, config.advertising);
1653 phylink_change_inband_advert(pl);
1654 }
1655 mutex_unlock(&pl->state_mutex);
1656
1657 return 0;
1658}
1659EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set);
1660
1661/**
1662 * phylink_ethtool_nway_reset() - restart negotiation
1663 * @pl: a pointer to a &struct phylink returned from phylink_create()
1664 *
1665 * Restart negotiation for the phylink instance specified by @pl. This will
1666 * cause any attached phy to restart negotiation with the link partner, and
1667 * if the MAC is in a BaseX mode, the MAC will also be requested to restart
1668 * negotiation.
1669 *
1670 * Returns zero on success, or negative error code.
1671 */
1672int phylink_ethtool_nway_reset(struct phylink *pl)
1673{
1674 int ret = 0;
1675
1676 ASSERT_RTNL();
1677
1678 if (pl->phydev)
1679 ret = phy_restart_aneg(pl->phydev);
1680 phylink_mac_pcs_an_restart(pl);
1681
1682 return ret;
1683}
1684EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset);
1685
1686/**
1687 * phylink_ethtool_get_pauseparam() - get the current pause parameters
1688 * @pl: a pointer to a &struct phylink returned from phylink_create()
1689 * @pause: a pointer to a &struct ethtool_pauseparam
1690 */
1691void phylink_ethtool_get_pauseparam(struct phylink *pl,
1692 struct ethtool_pauseparam *pause)
1693{
1694 ASSERT_RTNL();
1695
1696 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN);
1697 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX);
1698 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX);
1699}
1700EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam);
1701
1702/**
1703 * phylink_ethtool_set_pauseparam() - set the current pause parameters
1704 * @pl: a pointer to a &struct phylink returned from phylink_create()
1705 * @pause: a pointer to a &struct ethtool_pauseparam
1706 */
1707int phylink_ethtool_set_pauseparam(struct phylink *pl,
1708 struct ethtool_pauseparam *pause)
1709{
1710 struct phylink_link_state *config = &pl->link_config;
1711 bool manual_changed;
1712 int pause_state;
1713
1714 ASSERT_RTNL();
1715
1716 if (pl->cur_link_an_mode == MLO_AN_FIXED)
1717 return -EOPNOTSUPP;
1718
1719 if (!phylink_test(pl->supported, Pause) &&
1720 !phylink_test(pl->supported, Asym_Pause))
1721 return -EOPNOTSUPP;
1722
1723 if (!phylink_test(pl->supported, Asym_Pause) &&
1724 !pause->autoneg && pause->rx_pause != pause->tx_pause)
1725 return -EINVAL;
1726
1727 pause_state = 0;
1728 if (pause->autoneg)
1729 pause_state |= MLO_PAUSE_AN;
1730 if (pause->rx_pause)
1731 pause_state |= MLO_PAUSE_RX;
1732 if (pause->tx_pause)
1733 pause_state |= MLO_PAUSE_TX;
1734
1735 mutex_lock(&pl->state_mutex);
1736 /*
1737 * See the comments for linkmode_set_pause(), wrt the deficiencies
1738 * with the current implementation. A solution to this issue would
1739 * be:
1740 * ethtool Local device
1741 * rx tx Pause AsymDir
1742 * 0 0 0 0
1743 * 1 0 1 1
1744 * 0 1 0 1
1745 * 1 1 1 1
1746 * and then use the ethtool rx/tx enablement status to mask the
1747 * rx/tx pause resolution.
1748 */
1749 linkmode_set_pause(config->advertising, pause->tx_pause,
1750 pause->rx_pause);
1751
1752 manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN ||
1753 (!(pause_state & MLO_PAUSE_AN) &&
1754 (config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK);
1755
1756 config->pause = pause_state;
1757
1758 /* Update our in-band advertisement, triggering a renegotiation if
1759 * the advertisement changed.
1760 */
1761 if (!pl->phydev)
1762 phylink_change_inband_advert(pl);
1763
1764 mutex_unlock(&pl->state_mutex);
1765
1766 /* If we have a PHY, a change of the pause frame advertisement will
1767 * cause phylib to renegotiate (if AN is enabled) which will in turn
1768 * call our phylink_phy_change() and trigger a resolve. Note that
1769 * we can't hold our state mutex while calling phy_set_asym_pause().
1770 */
1771 if (pl->phydev)
1772 phy_set_asym_pause(pl->phydev, pause->rx_pause,
1773 pause->tx_pause);
1774
1775 /* If the manual pause settings changed, make sure we trigger a
1776 * resolve to update their state; we can not guarantee that the
1777 * link will cycle.
1778 */
1779 if (manual_changed) {
1780 pl->mac_link_dropped = true;
1781 phylink_run_resolve(pl);
1782 }
1783
1784 return 0;
1785}
1786EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam);
1787
1788/**
1789 * phylink_get_eee_err() - read the energy efficient ethernet error
1790 * counter
1791 * @pl: a pointer to a &struct phylink returned from phylink_create().
1792 *
1793 * Read the Energy Efficient Ethernet error counter from the PHY associated
1794 * with the phylink instance specified by @pl.
1795 *
1796 * Returns positive error counter value, or negative error code.
1797 */
1798int phylink_get_eee_err(struct phylink *pl)
1799{
1800 int ret = 0;
1801
1802 ASSERT_RTNL();
1803
1804 if (pl->phydev)
1805 ret = phy_get_eee_err(pl->phydev);
1806
1807 return ret;
1808}
1809EXPORT_SYMBOL_GPL(phylink_get_eee_err);
1810
1811/**
1812 * phylink_init_eee() - init and check the EEE features
1813 * @pl: a pointer to a &struct phylink returned from phylink_create()
1814 * @clk_stop_enable: allow PHY to stop receive clock
1815 *
1816 * Must be called either with RTNL held or within mac_link_up()
1817 */
1818int phylink_init_eee(struct phylink *pl, bool clk_stop_enable)
1819{
1820 int ret = -EOPNOTSUPP;
1821
1822 if (pl->phydev)
1823 ret = phy_init_eee(pl->phydev, clk_stop_enable);
1824
1825 return ret;
1826}
1827EXPORT_SYMBOL_GPL(phylink_init_eee);
1828
1829/**
1830 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters
1831 * @pl: a pointer to a &struct phylink returned from phylink_create()
1832 * @eee: a pointer to a &struct ethtool_eee for the read parameters
1833 */
1834int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee)
1835{
1836 int ret = -EOPNOTSUPP;
1837
1838 ASSERT_RTNL();
1839
1840 if (pl->phydev)
1841 ret = phy_ethtool_get_eee(pl->phydev, eee);
1842
1843 return ret;
1844}
1845EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee);
1846
1847/**
1848 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters
1849 * @pl: a pointer to a &struct phylink returned from phylink_create()
1850 * @eee: a pointer to a &struct ethtool_eee for the desired parameters
1851 */
1852int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee)
1853{
1854 int ret = -EOPNOTSUPP;
1855
1856 ASSERT_RTNL();
1857
1858 if (pl->phydev)
1859 ret = phy_ethtool_set_eee(pl->phydev, eee);
1860
1861 return ret;
1862}
1863EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee);
1864
1865/* This emulates MII registers for a fixed-mode phy operating as per the
1866 * passed in state. "aneg" defines if we report negotiation is possible.
1867 *
1868 * FIXME: should deal with negotiation state too.
1869 */
1870static int phylink_mii_emul_read(unsigned int reg,
1871 struct phylink_link_state *state)
1872{
1873 struct fixed_phy_status fs;
1874 unsigned long *lpa = state->lp_advertising;
1875 int val;
1876
1877 fs.link = state->link;
1878 fs.speed = state->speed;
1879 fs.duplex = state->duplex;
1880 fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa);
1881 fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa);
1882
1883 val = swphy_read_reg(reg, &fs);
1884 if (reg == MII_BMSR) {
1885 if (!state->an_complete)
1886 val &= ~BMSR_ANEGCOMPLETE;
1887 }
1888 return val;
1889}
1890
1891static int phylink_phy_read(struct phylink *pl, unsigned int phy_id,
1892 unsigned int reg)
1893{
1894 struct phy_device *phydev = pl->phydev;
1895 int prtad, devad;
1896
1897 if (mdio_phy_id_is_c45(phy_id)) {
1898 prtad = mdio_phy_id_prtad(phy_id);
1899 devad = mdio_phy_id_devad(phy_id);
1900 devad = mdiobus_c45_addr(devad, reg);
1901 } else if (phydev->is_c45) {
1902 switch (reg) {
1903 case MII_BMCR:
1904 case MII_BMSR:
1905 case MII_PHYSID1:
1906 case MII_PHYSID2:
1907 devad = __ffs(phydev->c45_ids.mmds_present);
1908 break;
1909 case MII_ADVERTISE:
1910 case MII_LPA:
1911 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN))
1912 return -EINVAL;
1913 devad = MDIO_MMD_AN;
1914 if (reg == MII_ADVERTISE)
1915 reg = MDIO_AN_ADVERTISE;
1916 else
1917 reg = MDIO_AN_LPA;
1918 break;
1919 default:
1920 return -EINVAL;
1921 }
1922 prtad = phy_id;
1923 devad = mdiobus_c45_addr(devad, reg);
1924 } else {
1925 prtad = phy_id;
1926 devad = reg;
1927 }
1928 return mdiobus_read(pl->phydev->mdio.bus, prtad, devad);
1929}
1930
1931static int phylink_phy_write(struct phylink *pl, unsigned int phy_id,
1932 unsigned int reg, unsigned int val)
1933{
1934 struct phy_device *phydev = pl->phydev;
1935 int prtad, devad;
1936
1937 if (mdio_phy_id_is_c45(phy_id)) {
1938 prtad = mdio_phy_id_prtad(phy_id);
1939 devad = mdio_phy_id_devad(phy_id);
1940 devad = mdiobus_c45_addr(devad, reg);
1941 } else if (phydev->is_c45) {
1942 switch (reg) {
1943 case MII_BMCR:
1944 case MII_BMSR:
1945 case MII_PHYSID1:
1946 case MII_PHYSID2:
1947 devad = __ffs(phydev->c45_ids.mmds_present);
1948 break;
1949 case MII_ADVERTISE:
1950 case MII_LPA:
1951 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN))
1952 return -EINVAL;
1953 devad = MDIO_MMD_AN;
1954 if (reg == MII_ADVERTISE)
1955 reg = MDIO_AN_ADVERTISE;
1956 else
1957 reg = MDIO_AN_LPA;
1958 break;
1959 default:
1960 return -EINVAL;
1961 }
1962 prtad = phy_id;
1963 devad = mdiobus_c45_addr(devad, reg);
1964 } else {
1965 prtad = phy_id;
1966 devad = reg;
1967 }
1968
1969 return mdiobus_write(phydev->mdio.bus, prtad, devad, val);
1970}
1971
1972static int phylink_mii_read(struct phylink *pl, unsigned int phy_id,
1973 unsigned int reg)
1974{
1975 struct phylink_link_state state;
1976 int val = 0xffff;
1977
1978 switch (pl->cur_link_an_mode) {
1979 case MLO_AN_FIXED:
1980 if (phy_id == 0) {
1981 phylink_get_fixed_state(pl, &state);
1982 val = phylink_mii_emul_read(reg, &state);
1983 }
1984 break;
1985
1986 case MLO_AN_PHY:
1987 return -EOPNOTSUPP;
1988
1989 case MLO_AN_INBAND:
1990 if (phy_id == 0) {
1991 phylink_mac_pcs_get_state(pl, &state);
1992 val = phylink_mii_emul_read(reg, &state);
1993 }
1994 break;
1995 }
1996
1997 return val & 0xffff;
1998}
1999
2000static int phylink_mii_write(struct phylink *pl, unsigned int phy_id,
2001 unsigned int reg, unsigned int val)
2002{
2003 switch (pl->cur_link_an_mode) {
2004 case MLO_AN_FIXED:
2005 break;
2006
2007 case MLO_AN_PHY:
2008 return -EOPNOTSUPP;
2009
2010 case MLO_AN_INBAND:
2011 break;
2012 }
2013
2014 return 0;
2015}
2016
2017/**
2018 * phylink_mii_ioctl() - generic mii ioctl interface
2019 * @pl: a pointer to a &struct phylink returned from phylink_create()
2020 * @ifr: a pointer to a &struct ifreq for socket ioctls
2021 * @cmd: ioctl cmd to execute
2022 *
2023 * Perform the specified MII ioctl on the PHY attached to the phylink instance
2024 * specified by @pl. If no PHY is attached, emulate the presence of the PHY.
2025 *
2026 * Returns: zero on success or negative error code.
2027 *
2028 * %SIOCGMIIPHY:
2029 * read register from the current PHY.
2030 * %SIOCGMIIREG:
2031 * read register from the specified PHY.
2032 * %SIOCSMIIREG:
2033 * set a register on the specified PHY.
2034 */
2035int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd)
2036{
2037 struct mii_ioctl_data *mii = if_mii(ifr);
2038 int ret;
2039
2040 ASSERT_RTNL();
2041
2042 if (pl->phydev) {
2043 /* PHYs only exist for MLO_AN_PHY and SGMII */
2044 switch (cmd) {
2045 case SIOCGMIIPHY:
2046 mii->phy_id = pl->phydev->mdio.addr;
2047 fallthrough;
2048
2049 case SIOCGMIIREG:
2050 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num);
2051 if (ret >= 0) {
2052 mii->val_out = ret;
2053 ret = 0;
2054 }
2055 break;
2056
2057 case SIOCSMIIREG:
2058 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num,
2059 mii->val_in);
2060 break;
2061
2062 default:
2063 ret = phy_mii_ioctl(pl->phydev, ifr, cmd);
2064 break;
2065 }
2066 } else {
2067 switch (cmd) {
2068 case SIOCGMIIPHY:
2069 mii->phy_id = 0;
2070 fallthrough;
2071
2072 case SIOCGMIIREG:
2073 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num);
2074 if (ret >= 0) {
2075 mii->val_out = ret;
2076 ret = 0;
2077 }
2078 break;
2079
2080 case SIOCSMIIREG:
2081 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num,
2082 mii->val_in);
2083 break;
2084
2085 default:
2086 ret = -EOPNOTSUPP;
2087 break;
2088 }
2089 }
2090
2091 return ret;
2092}
2093EXPORT_SYMBOL_GPL(phylink_mii_ioctl);
2094
2095/**
2096 * phylink_speed_down() - set the non-SFP PHY to lowest speed supported by both
2097 * link partners
2098 * @pl: a pointer to a &struct phylink returned from phylink_create()
2099 * @sync: perform action synchronously
2100 *
2101 * If we have a PHY that is not part of a SFP module, then set the speed
2102 * as described in the phy_speed_down() function. Please see this function
2103 * for a description of the @sync parameter.
2104 *
2105 * Returns zero if there is no PHY, otherwise as per phy_speed_down().
2106 */
2107int phylink_speed_down(struct phylink *pl, bool sync)
2108{
2109 int ret = 0;
2110
2111 ASSERT_RTNL();
2112
2113 if (!pl->sfp_bus && pl->phydev)
2114 ret = phy_speed_down(pl->phydev, sync);
2115
2116 return ret;
2117}
2118EXPORT_SYMBOL_GPL(phylink_speed_down);
2119
2120/**
2121 * phylink_speed_up() - restore the advertised speeds prior to the call to
2122 * phylink_speed_down()
2123 * @pl: a pointer to a &struct phylink returned from phylink_create()
2124 *
2125 * If we have a PHY that is not part of a SFP module, then restore the
2126 * PHY speeds as per phy_speed_up().
2127 *
2128 * Returns zero if there is no PHY, otherwise as per phy_speed_up().
2129 */
2130int phylink_speed_up(struct phylink *pl)
2131{
2132 int ret = 0;
2133
2134 ASSERT_RTNL();
2135
2136 if (!pl->sfp_bus && pl->phydev)
2137 ret = phy_speed_up(pl->phydev);
2138
2139 return ret;
2140}
2141EXPORT_SYMBOL_GPL(phylink_speed_up);
2142
2143static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus)
2144{
2145 struct phylink *pl = upstream;
2146
2147 pl->netdev->sfp_bus = bus;
2148}
2149
2150static void phylink_sfp_detach(void *upstream, struct sfp_bus *bus)
2151{
2152 struct phylink *pl = upstream;
2153
2154 pl->netdev->sfp_bus = NULL;
2155}
2156
2157static int phylink_sfp_config(struct phylink *pl, u8 mode,
2158 const unsigned long *supported,
2159 const unsigned long *advertising)
2160{
2161 __ETHTOOL_DECLARE_LINK_MODE_MASK(support1);
2162 __ETHTOOL_DECLARE_LINK_MODE_MASK(support);
2163 struct phylink_link_state config;
2164 phy_interface_t iface;
2165 bool changed;
2166 int ret;
2167
2168 linkmode_copy(support, supported);
2169
2170 memset(&config, 0, sizeof(config));
2171 linkmode_copy(config.advertising, advertising);
2172 config.interface = PHY_INTERFACE_MODE_NA;
2173 config.speed = SPEED_UNKNOWN;
2174 config.duplex = DUPLEX_UNKNOWN;
2175 config.pause = MLO_PAUSE_AN;
2176 config.an_enabled = pl->link_config.an_enabled;
2177
2178 /* Ignore errors if we're expecting a PHY to attach later */
2179 ret = phylink_validate(pl, support, &config);
2180 if (ret) {
2181 phylink_err(pl, "validation with support %*pb failed: %d\n",
2182 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
2183 return ret;
2184 }
2185
2186 iface = sfp_select_interface(pl->sfp_bus, config.advertising);
2187 if (iface == PHY_INTERFACE_MODE_NA) {
2188 phylink_err(pl,
2189 "selection of interface failed, advertisement %*pb\n",
2190 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising);
2191 return -EINVAL;
2192 }
2193
2194 config.interface = iface;
2195 linkmode_copy(support1, support);
2196 ret = phylink_validate(pl, support1, &config);
2197 if (ret) {
2198 phylink_err(pl, "validation of %s/%s with support %*pb failed: %d\n",
2199 phylink_an_mode_str(mode),
2200 phy_modes(config.interface),
2201 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
2202 return ret;
2203 }
2204
2205 phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n",
2206 phylink_an_mode_str(mode), phy_modes(config.interface),
2207 __ETHTOOL_LINK_MODE_MASK_NBITS, support);
2208
2209 if (phy_interface_mode_is_8023z(iface) && pl->phydev)
2210 return -EINVAL;
2211
2212 changed = !linkmode_equal(pl->supported, support) ||
2213 !linkmode_equal(pl->link_config.advertising,
2214 config.advertising);
2215 if (changed) {
2216 linkmode_copy(pl->supported, support);
2217 linkmode_copy(pl->link_config.advertising, config.advertising);
2218 }
2219
2220 if (pl->cur_link_an_mode != mode ||
2221 pl->link_config.interface != config.interface) {
2222 pl->link_config.interface = config.interface;
2223 pl->cur_link_an_mode = mode;
2224
2225 changed = true;
2226
2227 phylink_info(pl, "switched to %s/%s link mode\n",
2228 phylink_an_mode_str(mode),
2229 phy_modes(config.interface));
2230 }
2231
2232 pl->link_port = pl->sfp_port;
2233
2234 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED,
2235 &pl->phylink_disable_state))
2236 phylink_mac_initial_config(pl, false);
2237
2238 return ret;
2239}
2240
2241static int phylink_sfp_module_insert(void *upstream,
2242 const struct sfp_eeprom_id *id)
2243{
2244 struct phylink *pl = upstream;
2245 unsigned long *support = pl->sfp_support;
2246
2247 ASSERT_RTNL();
2248
2249 linkmode_zero(support);
2250 sfp_parse_support(pl->sfp_bus, id, support);
2251 pl->sfp_port = sfp_parse_port(pl->sfp_bus, id, support);
2252
2253 /* If this module may have a PHY connecting later, defer until later */
2254 pl->sfp_may_have_phy = sfp_may_have_phy(pl->sfp_bus, id);
2255 if (pl->sfp_may_have_phy)
2256 return 0;
2257
2258 return phylink_sfp_config(pl, MLO_AN_INBAND, support, support);
2259}
2260
2261static int phylink_sfp_module_start(void *upstream)
2262{
2263 struct phylink *pl = upstream;
2264
2265 /* If this SFP module has a PHY, start the PHY now. */
2266 if (pl->phydev) {
2267 phy_start(pl->phydev);
2268 return 0;
2269 }
2270
2271 /* If the module may have a PHY but we didn't detect one we
2272 * need to configure the MAC here.
2273 */
2274 if (!pl->sfp_may_have_phy)
2275 return 0;
2276
2277 return phylink_sfp_config(pl, MLO_AN_INBAND,
2278 pl->sfp_support, pl->sfp_support);
2279}
2280
2281static void phylink_sfp_module_stop(void *upstream)
2282{
2283 struct phylink *pl = upstream;
2284
2285 /* If this SFP module has a PHY, stop it. */
2286 if (pl->phydev)
2287 phy_stop(pl->phydev);
2288}
2289
2290static void phylink_sfp_link_down(void *upstream)
2291{
2292 struct phylink *pl = upstream;
2293
2294 ASSERT_RTNL();
2295
2296 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK);
2297}
2298
2299static void phylink_sfp_link_up(void *upstream)
2300{
2301 struct phylink *pl = upstream;
2302
2303 ASSERT_RTNL();
2304
2305 clear_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state);
2306 phylink_run_resolve(pl);
2307}
2308
2309/* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII
2310 * or 802.3z control word, so inband will not work.
2311 */
2312static bool phylink_phy_no_inband(struct phy_device *phy)
2313{
2314 return phy->is_c45 &&
2315 (phy->c45_ids.device_ids[1] & 0xfffffff0) == 0xae025150;
2316}
2317
2318static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy)
2319{
2320 struct phylink *pl = upstream;
2321 phy_interface_t interface;
2322 u8 mode;
2323 int ret;
2324
2325 /*
2326 * This is the new way of dealing with flow control for PHYs,
2327 * as described by Timur Tabi in commit 529ed1275263 ("net: phy:
2328 * phy drivers should not set SUPPORTED_[Asym_]Pause") except
2329 * using our validate call to the MAC, we rely upon the MAC
2330 * clearing the bits from both supported and advertising fields.
2331 */
2332 phy_support_asym_pause(phy);
2333
2334 if (phylink_phy_no_inband(phy))
2335 mode = MLO_AN_PHY;
2336 else
2337 mode = MLO_AN_INBAND;
2338
2339 /* Do the initial configuration */
2340 ret = phylink_sfp_config(pl, mode, phy->supported, phy->advertising);
2341 if (ret < 0)
2342 return ret;
2343
2344 interface = pl->link_config.interface;
2345 ret = phylink_attach_phy(pl, phy, interface);
2346 if (ret < 0)
2347 return ret;
2348
2349 ret = phylink_bringup_phy(pl, phy, interface);
2350 if (ret)
2351 phy_detach(phy);
2352
2353 return ret;
2354}
2355
2356static void phylink_sfp_disconnect_phy(void *upstream)
2357{
2358 phylink_disconnect_phy(upstream);
2359}
2360
2361static const struct sfp_upstream_ops sfp_phylink_ops = {
2362 .attach = phylink_sfp_attach,
2363 .detach = phylink_sfp_detach,
2364 .module_insert = phylink_sfp_module_insert,
2365 .module_start = phylink_sfp_module_start,
2366 .module_stop = phylink_sfp_module_stop,
2367 .link_up = phylink_sfp_link_up,
2368 .link_down = phylink_sfp_link_down,
2369 .connect_phy = phylink_sfp_connect_phy,
2370 .disconnect_phy = phylink_sfp_disconnect_phy,
2371};
2372
2373/* Helpers for MAC drivers */
2374
2375/**
2376 * phylink_helper_basex_speed() - 1000BaseX/2500BaseX helper
2377 * @state: a pointer to a &struct phylink_link_state
2378 *
2379 * Inspect the interface mode, advertising mask or forced speed and
2380 * decide whether to run at 2.5Gbit or 1Gbit appropriately, switching
2381 * the interface mode to suit. @state->interface is appropriately
2382 * updated, and the advertising mask has the "other" baseX_Full flag
2383 * cleared.
2384 */
2385void phylink_helper_basex_speed(struct phylink_link_state *state)
2386{
2387 if (phy_interface_mode_is_8023z(state->interface)) {
2388 bool want_2500 = state->an_enabled ?
2389 phylink_test(state->advertising, 2500baseX_Full) :
2390 state->speed == SPEED_2500;
2391
2392 if (want_2500) {
2393 phylink_clear(state->advertising, 1000baseX_Full);
2394 state->interface = PHY_INTERFACE_MODE_2500BASEX;
2395 } else {
2396 phylink_clear(state->advertising, 2500baseX_Full);
2397 state->interface = PHY_INTERFACE_MODE_1000BASEX;
2398 }
2399 }
2400}
2401EXPORT_SYMBOL_GPL(phylink_helper_basex_speed);
2402
2403static void phylink_decode_c37_word(struct phylink_link_state *state,
2404 uint16_t config_reg, int speed)
2405{
2406 bool tx_pause, rx_pause;
2407 int fd_bit;
2408
2409 if (speed == SPEED_2500)
2410 fd_bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT;
2411 else
2412 fd_bit = ETHTOOL_LINK_MODE_1000baseX_Full_BIT;
2413
2414 mii_lpa_mod_linkmode_x(state->lp_advertising, config_reg, fd_bit);
2415
2416 if (linkmode_test_bit(fd_bit, state->advertising) &&
2417 linkmode_test_bit(fd_bit, state->lp_advertising)) {
2418 state->speed = speed;
2419 state->duplex = DUPLEX_FULL;
2420 } else {
2421 /* negotiation failure */
2422 state->link = false;
2423 }
2424
2425 linkmode_resolve_pause(state->advertising, state->lp_advertising,
2426 &tx_pause, &rx_pause);
2427
2428 if (tx_pause)
2429 state->pause |= MLO_PAUSE_TX;
2430 if (rx_pause)
2431 state->pause |= MLO_PAUSE_RX;
2432}
2433
2434static void phylink_decode_sgmii_word(struct phylink_link_state *state,
2435 uint16_t config_reg)
2436{
2437 if (!(config_reg & LPA_SGMII_LINK)) {
2438 state->link = false;
2439 return;
2440 }
2441
2442 switch (config_reg & LPA_SGMII_SPD_MASK) {
2443 case LPA_SGMII_10:
2444 state->speed = SPEED_10;
2445 break;
2446 case LPA_SGMII_100:
2447 state->speed = SPEED_100;
2448 break;
2449 case LPA_SGMII_1000:
2450 state->speed = SPEED_1000;
2451 break;
2452 default:
2453 state->link = false;
2454 return;
2455 }
2456 if (config_reg & LPA_SGMII_FULL_DUPLEX)
2457 state->duplex = DUPLEX_FULL;
2458 else
2459 state->duplex = DUPLEX_HALF;
2460}
2461
2462/**
2463 * phylink_decode_usxgmii_word() - decode the USXGMII word from a MAC PCS
2464 * @state: a pointer to a struct phylink_link_state.
2465 * @lpa: a 16 bit value which stores the USXGMII auto-negotiation word
2466 *
2467 * Helper for MAC PCS supporting the USXGMII protocol and the auto-negotiation
2468 * code word. Decode the USXGMII code word and populate the corresponding fields
2469 * (speed, duplex) into the phylink_link_state structure.
2470 */
2471void phylink_decode_usxgmii_word(struct phylink_link_state *state,
2472 uint16_t lpa)
2473{
2474 switch (lpa & MDIO_USXGMII_SPD_MASK) {
2475 case MDIO_USXGMII_10:
2476 state->speed = SPEED_10;
2477 break;
2478 case MDIO_USXGMII_100:
2479 state->speed = SPEED_100;
2480 break;
2481 case MDIO_USXGMII_1000:
2482 state->speed = SPEED_1000;
2483 break;
2484 case MDIO_USXGMII_2500:
2485 state->speed = SPEED_2500;
2486 break;
2487 case MDIO_USXGMII_5000:
2488 state->speed = SPEED_5000;
2489 break;
2490 case MDIO_USXGMII_10G:
2491 state->speed = SPEED_10000;
2492 break;
2493 default:
2494 state->link = false;
2495 return;
2496 }
2497
2498 if (lpa & MDIO_USXGMII_FULL_DUPLEX)
2499 state->duplex = DUPLEX_FULL;
2500 else
2501 state->duplex = DUPLEX_HALF;
2502}
2503EXPORT_SYMBOL_GPL(phylink_decode_usxgmii_word);
2504
2505/**
2506 * phylink_mii_c22_pcs_get_state() - read the MAC PCS state
2507 * @pcs: a pointer to a &struct mdio_device.
2508 * @state: a pointer to a &struct phylink_link_state.
2509 *
2510 * Helper for MAC PCS supporting the 802.3 clause 22 register set for
2511 * clause 37 negotiation and/or SGMII control.
2512 *
2513 * Read the MAC PCS state from the MII device configured in @config and
2514 * parse the Clause 37 or Cisco SGMII link partner negotiation word into
2515 * the phylink @state structure. This is suitable to be directly plugged
2516 * into the mac_pcs_get_state() member of the struct phylink_mac_ops
2517 * structure.
2518 */
2519void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs,
2520 struct phylink_link_state *state)
2521{
2522 struct mii_bus *bus = pcs->bus;
2523 int addr = pcs->addr;
2524 int bmsr, lpa;
2525
2526 bmsr = mdiobus_read(bus, addr, MII_BMSR);
2527 lpa = mdiobus_read(bus, addr, MII_LPA);
2528 if (bmsr < 0 || lpa < 0) {
2529 state->link = false;
2530 return;
2531 }
2532
2533 state->link = !!(bmsr & BMSR_LSTATUS);
2534 state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE);
2535 if (!state->link)
2536 return;
2537
2538 switch (state->interface) {
2539 case PHY_INTERFACE_MODE_1000BASEX:
2540 phylink_decode_c37_word(state, lpa, SPEED_1000);
2541 break;
2542
2543 case PHY_INTERFACE_MODE_2500BASEX:
2544 phylink_decode_c37_word(state, lpa, SPEED_2500);
2545 break;
2546
2547 case PHY_INTERFACE_MODE_SGMII:
2548 case PHY_INTERFACE_MODE_QSGMII:
2549 phylink_decode_sgmii_word(state, lpa);
2550 break;
2551
2552 default:
2553 state->link = false;
2554 break;
2555 }
2556}
2557EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state);
2558
2559/**
2560 * phylink_mii_c22_pcs_set_advertisement() - configure the clause 37 PCS
2561 * advertisement
2562 * @pcs: a pointer to a &struct mdio_device.
2563 * @interface: the PHY interface mode being configured
2564 * @advertising: the ethtool advertisement mask
2565 *
2566 * Helper for MAC PCS supporting the 802.3 clause 22 register set for
2567 * clause 37 negotiation and/or SGMII control.
2568 *
2569 * Configure the clause 37 PCS advertisement as specified by @state. This
2570 * does not trigger a renegotiation; phylink will do that via the
2571 * mac_an_restart() method of the struct phylink_mac_ops structure.
2572 *
2573 * Returns negative error code on failure to configure the advertisement,
2574 * zero if no change has been made, or one if the advertisement has changed.
2575 */
2576int phylink_mii_c22_pcs_set_advertisement(struct mdio_device *pcs,
2577 phy_interface_t interface,
2578 const unsigned long *advertising)
2579{
2580 struct mii_bus *bus = pcs->bus;
2581 int addr = pcs->addr;
2582 int val, ret;
2583 u16 adv;
2584
2585 switch (interface) {
2586 case PHY_INTERFACE_MODE_1000BASEX:
2587 case PHY_INTERFACE_MODE_2500BASEX:
2588 adv = ADVERTISE_1000XFULL;
2589 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2590 advertising))
2591 adv |= ADVERTISE_1000XPAUSE;
2592 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2593 advertising))
2594 adv |= ADVERTISE_1000XPSE_ASYM;
2595
2596 val = mdiobus_read(bus, addr, MII_ADVERTISE);
2597 if (val < 0)
2598 return val;
2599
2600 if (val == adv)
2601 return 0;
2602
2603 ret = mdiobus_write(bus, addr, MII_ADVERTISE, adv);
2604 if (ret < 0)
2605 return ret;
2606
2607 return 1;
2608
2609 case PHY_INTERFACE_MODE_SGMII:
2610 val = mdiobus_read(bus, addr, MII_ADVERTISE);
2611 if (val < 0)
2612 return val;
2613
2614 if (val == 0x0001)
2615 return 0;
2616
2617 ret = mdiobus_write(bus, addr, MII_ADVERTISE, 0x0001);
2618 if (ret < 0)
2619 return ret;
2620
2621 return 1;
2622
2623 default:
2624 /* Nothing to do for other modes */
2625 return 0;
2626 }
2627}
2628EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_set_advertisement);
2629
2630/**
2631 * phylink_mii_c22_pcs_config() - configure clause 22 PCS
2632 * @pcs: a pointer to a &struct mdio_device.
2633 * @mode: link autonegotiation mode
2634 * @interface: the PHY interface mode being configured
2635 * @advertising: the ethtool advertisement mask
2636 *
2637 * Configure a Clause 22 PCS PHY with the appropriate negotiation
2638 * parameters for the @mode, @interface and @advertising parameters.
2639 * Returns negative error number on failure, zero if the advertisement
2640 * has not changed, or positive if there is a change.
2641 */
2642int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode,
2643 phy_interface_t interface,
2644 const unsigned long *advertising)
2645{
2646 bool changed;
2647 u16 bmcr;
2648 int ret;
2649
2650 ret = phylink_mii_c22_pcs_set_advertisement(pcs, interface,
2651 advertising);
2652 if (ret < 0)
2653 return ret;
2654
2655 changed = ret > 0;
2656
2657 /* Ensure ISOLATE bit is disabled */
2658 bmcr = mode == MLO_AN_INBAND ? BMCR_ANENABLE : 0;
2659 ret = mdiobus_modify(pcs->bus, pcs->addr, MII_BMCR,
2660 BMCR_ANENABLE | BMCR_ISOLATE, bmcr);
2661 if (ret < 0)
2662 return ret;
2663
2664 return changed ? 1 : 0;
2665}
2666EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config);
2667
2668/**
2669 * phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation
2670 * @pcs: a pointer to a &struct mdio_device.
2671 *
2672 * Helper for MAC PCS supporting the 802.3 clause 22 register set for
2673 * clause 37 negotiation.
2674 *
2675 * Restart the clause 37 negotiation with the link partner. This is
2676 * suitable to be directly plugged into the mac_pcs_get_state() member
2677 * of the struct phylink_mac_ops structure.
2678 */
2679void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs)
2680{
2681 struct mii_bus *bus = pcs->bus;
2682 int val, addr = pcs->addr;
2683
2684 val = mdiobus_read(bus, addr, MII_BMCR);
2685 if (val >= 0) {
2686 val |= BMCR_ANRESTART;
2687
2688 mdiobus_write(bus, addr, MII_BMCR, val);
2689 }
2690}
2691EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart);
2692
2693void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs,
2694 struct phylink_link_state *state)
2695{
2696 struct mii_bus *bus = pcs->bus;
2697 int addr = pcs->addr;
2698 int stat;
2699
2700 stat = mdiobus_c45_read(bus, addr, MDIO_MMD_PCS, MDIO_STAT1);
2701 if (stat < 0) {
2702 state->link = false;
2703 return;
2704 }
2705
2706 state->link = !!(stat & MDIO_STAT1_LSTATUS);
2707 if (!state->link)
2708 return;
2709
2710 switch (state->interface) {
2711 case PHY_INTERFACE_MODE_10GBASER:
2712 state->speed = SPEED_10000;
2713 state->duplex = DUPLEX_FULL;
2714 break;
2715
2716 default:
2717 break;
2718 }
2719}
2720EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state);
2721
2722MODULE_LICENSE("GPL v2");