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1/*
2 * phylink models the MAC to optional PHY connection, supporting
3 * technologies such as SFP cages where the PHY is hot-pluggable.
4 *
5 * Copyright (C) 2015 Russell King
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11#include <linux/ethtool.h>
12#include <linux/export.h>
13#include <linux/gpio/consumer.h>
14#include <linux/netdevice.h>
15#include <linux/of.h>
16#include <linux/of_mdio.h>
17#include <linux/phy.h>
18#include <linux/phy_fixed.h>
19#include <linux/phylink.h>
20#include <linux/rtnetlink.h>
21#include <linux/spinlock.h>
22#include <linux/workqueue.h>
23
24#include "sfp.h"
25#include "swphy.h"
26
27#define SUPPORTED_INTERFACES \
28 (SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \
29 SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane)
30#define ADVERTISED_INTERFACES \
31 (ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \
32 ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane)
33
34enum {
35 PHYLINK_DISABLE_STOPPED,
36 PHYLINK_DISABLE_LINK,
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 *ops;
46
47 unsigned long phylink_disable_state; /* bitmask of disables */
48 struct phy_device *phydev;
49 phy_interface_t link_interface; /* PHY_INTERFACE_xxx */
50 u8 link_an_mode; /* MLO_AN_xxx */
51 u8 link_port; /* The current non-phy ethtool port */
52 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
53
54 /* The link configuration settings */
55 struct phylink_link_state link_config;
56 struct gpio_desc *link_gpio;
57 void (*get_fixed_state)(struct net_device *dev,
58 struct phylink_link_state *s);
59
60 struct mutex state_mutex;
61 struct phylink_link_state phy_state;
62 struct work_struct resolve;
63
64 bool mac_link_dropped;
65
66 struct sfp_bus *sfp_bus;
67};
68
69static inline void linkmode_zero(unsigned long *dst)
70{
71 bitmap_zero(dst, __ETHTOOL_LINK_MODE_MASK_NBITS);
72}
73
74static inline void linkmode_copy(unsigned long *dst, const unsigned long *src)
75{
76 bitmap_copy(dst, src, __ETHTOOL_LINK_MODE_MASK_NBITS);
77}
78
79static inline void linkmode_and(unsigned long *dst, const unsigned long *a,
80 const unsigned long *b)
81{
82 bitmap_and(dst, a, b, __ETHTOOL_LINK_MODE_MASK_NBITS);
83}
84
85static inline void linkmode_or(unsigned long *dst, const unsigned long *a,
86 const unsigned long *b)
87{
88 bitmap_or(dst, a, b, __ETHTOOL_LINK_MODE_MASK_NBITS);
89}
90
91static inline bool linkmode_empty(const unsigned long *src)
92{
93 return bitmap_empty(src, __ETHTOOL_LINK_MODE_MASK_NBITS);
94}
95
96/**
97 * phylink_set_port_modes() - set the port type modes in the ethtool mask
98 * @mask: ethtool link mode mask
99 *
100 * Sets all the port type modes in the ethtool mask. MAC drivers should
101 * use this in their 'validate' callback.
102 */
103void phylink_set_port_modes(unsigned long *mask)
104{
105 phylink_set(mask, TP);
106 phylink_set(mask, AUI);
107 phylink_set(mask, MII);
108 phylink_set(mask, FIBRE);
109 phylink_set(mask, BNC);
110 phylink_set(mask, Backplane);
111}
112EXPORT_SYMBOL_GPL(phylink_set_port_modes);
113
114static int phylink_is_empty_linkmode(const unsigned long *linkmode)
115{
116 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, };
117
118 phylink_set_port_modes(tmp);
119 phylink_set(tmp, Autoneg);
120 phylink_set(tmp, Pause);
121 phylink_set(tmp, Asym_Pause);
122
123 bitmap_andnot(tmp, linkmode, tmp, __ETHTOOL_LINK_MODE_MASK_NBITS);
124
125 return linkmode_empty(tmp);
126}
127
128static const char *phylink_an_mode_str(unsigned int mode)
129{
130 static const char *modestr[] = {
131 [MLO_AN_PHY] = "phy",
132 [MLO_AN_FIXED] = "fixed",
133 [MLO_AN_INBAND] = "inband",
134 };
135
136 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown";
137}
138
139static int phylink_validate(struct phylink *pl, unsigned long *supported,
140 struct phylink_link_state *state)
141{
142 pl->ops->validate(pl->netdev, supported, state);
143
144 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0;
145}
146
147static int phylink_parse_fixedlink(struct phylink *pl,
148 struct fwnode_handle *fwnode)
149{
150 struct fwnode_handle *fixed_node;
151 const struct phy_setting *s;
152 struct gpio_desc *desc;
153 u32 speed;
154 int ret;
155
156 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link");
157 if (fixed_node) {
158 ret = fwnode_property_read_u32(fixed_node, "speed", &speed);
159
160 pl->link_config.speed = speed;
161 pl->link_config.duplex = DUPLEX_HALF;
162
163 if (fwnode_property_read_bool(fixed_node, "full-duplex"))
164 pl->link_config.duplex = DUPLEX_FULL;
165
166 /* We treat the "pause" and "asym-pause" terminology as
167 * defining the link partner's ability. */
168 if (fwnode_property_read_bool(fixed_node, "pause"))
169 pl->link_config.pause |= MLO_PAUSE_SYM;
170 if (fwnode_property_read_bool(fixed_node, "asym-pause"))
171 pl->link_config.pause |= MLO_PAUSE_ASYM;
172
173 if (ret == 0) {
174 desc = fwnode_get_named_gpiod(fixed_node, "link-gpios",
175 0, GPIOD_IN, "?");
176
177 if (!IS_ERR(desc))
178 pl->link_gpio = desc;
179 else if (desc == ERR_PTR(-EPROBE_DEFER))
180 ret = -EPROBE_DEFER;
181 }
182 fwnode_handle_put(fixed_node);
183
184 if (ret)
185 return ret;
186 } else {
187 u32 prop[5];
188
189 ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
190 NULL, 0);
191 if (ret != ARRAY_SIZE(prop)) {
192 netdev_err(pl->netdev, "broken fixed-link?\n");
193 return -EINVAL;
194 }
195
196 ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
197 prop, ARRAY_SIZE(prop));
198 if (!ret) {
199 pl->link_config.duplex = prop[1] ?
200 DUPLEX_FULL : DUPLEX_HALF;
201 pl->link_config.speed = prop[2];
202 if (prop[3])
203 pl->link_config.pause |= MLO_PAUSE_SYM;
204 if (prop[4])
205 pl->link_config.pause |= MLO_PAUSE_ASYM;
206 }
207 }
208
209 if (pl->link_config.speed > SPEED_1000 &&
210 pl->link_config.duplex != DUPLEX_FULL)
211 netdev_warn(pl->netdev, "fixed link specifies half duplex for %dMbps link?\n",
212 pl->link_config.speed);
213
214 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
215 linkmode_copy(pl->link_config.advertising, pl->supported);
216 phylink_validate(pl, pl->supported, &pl->link_config);
217
218 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex,
219 pl->supported,
220 __ETHTOOL_LINK_MODE_MASK_NBITS, true);
221 linkmode_zero(pl->supported);
222 phylink_set(pl->supported, MII);
223 if (s) {
224 __set_bit(s->bit, pl->supported);
225 } else {
226 netdev_warn(pl->netdev, "fixed link %s duplex %dMbps not recognised\n",
227 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half",
228 pl->link_config.speed);
229 }
230
231 linkmode_and(pl->link_config.advertising, pl->link_config.advertising,
232 pl->supported);
233
234 pl->link_config.link = 1;
235 pl->link_config.an_complete = 1;
236
237 return 0;
238}
239
240static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode)
241{
242 struct fwnode_handle *dn;
243 const char *managed;
244
245 dn = fwnode_get_named_child_node(fwnode, "fixed-link");
246 if (dn || fwnode_property_present(fwnode, "fixed-link"))
247 pl->link_an_mode = MLO_AN_FIXED;
248 fwnode_handle_put(dn);
249
250 if (fwnode_property_read_string(fwnode, "managed", &managed) == 0 &&
251 strcmp(managed, "in-band-status") == 0) {
252 if (pl->link_an_mode == MLO_AN_FIXED) {
253 netdev_err(pl->netdev,
254 "can't use both fixed-link and in-band-status\n");
255 return -EINVAL;
256 }
257
258 linkmode_zero(pl->supported);
259 phylink_set(pl->supported, MII);
260 phylink_set(pl->supported, Autoneg);
261 phylink_set(pl->supported, Asym_Pause);
262 phylink_set(pl->supported, Pause);
263 pl->link_config.an_enabled = true;
264 pl->link_an_mode = MLO_AN_INBAND;
265
266 switch (pl->link_config.interface) {
267 case PHY_INTERFACE_MODE_SGMII:
268 phylink_set(pl->supported, 10baseT_Half);
269 phylink_set(pl->supported, 10baseT_Full);
270 phylink_set(pl->supported, 100baseT_Half);
271 phylink_set(pl->supported, 100baseT_Full);
272 phylink_set(pl->supported, 1000baseT_Half);
273 phylink_set(pl->supported, 1000baseT_Full);
274 break;
275
276 case PHY_INTERFACE_MODE_1000BASEX:
277 phylink_set(pl->supported, 1000baseX_Full);
278 break;
279
280 case PHY_INTERFACE_MODE_2500BASEX:
281 phylink_set(pl->supported, 2500baseX_Full);
282 break;
283
284 case PHY_INTERFACE_MODE_10GKR:
285 phylink_set(pl->supported, 10baseT_Half);
286 phylink_set(pl->supported, 10baseT_Full);
287 phylink_set(pl->supported, 100baseT_Half);
288 phylink_set(pl->supported, 100baseT_Full);
289 phylink_set(pl->supported, 1000baseT_Half);
290 phylink_set(pl->supported, 1000baseT_Full);
291 phylink_set(pl->supported, 1000baseX_Full);
292 phylink_set(pl->supported, 10000baseKR_Full);
293 phylink_set(pl->supported, 10000baseCR_Full);
294 phylink_set(pl->supported, 10000baseSR_Full);
295 phylink_set(pl->supported, 10000baseLR_Full);
296 phylink_set(pl->supported, 10000baseLRM_Full);
297 phylink_set(pl->supported, 10000baseER_Full);
298 break;
299
300 default:
301 netdev_err(pl->netdev,
302 "incorrect link mode %s for in-band status\n",
303 phy_modes(pl->link_config.interface));
304 return -EINVAL;
305 }
306
307 linkmode_copy(pl->link_config.advertising, pl->supported);
308
309 if (phylink_validate(pl, pl->supported, &pl->link_config)) {
310 netdev_err(pl->netdev,
311 "failed to validate link configuration for in-band status\n");
312 return -EINVAL;
313 }
314 }
315
316 return 0;
317}
318
319static void phylink_mac_config(struct phylink *pl,
320 const struct phylink_link_state *state)
321{
322 netdev_dbg(pl->netdev,
323 "%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n",
324 __func__, phylink_an_mode_str(pl->link_an_mode),
325 phy_modes(state->interface),
326 phy_speed_to_str(state->speed),
327 phy_duplex_to_str(state->duplex),
328 __ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising,
329 state->pause, state->link, state->an_enabled);
330
331 pl->ops->mac_config(pl->netdev, pl->link_an_mode, state);
332}
333
334static void phylink_mac_an_restart(struct phylink *pl)
335{
336 if (pl->link_config.an_enabled &&
337 phy_interface_mode_is_8023z(pl->link_config.interface))
338 pl->ops->mac_an_restart(pl->netdev);
339}
340
341static int phylink_get_mac_state(struct phylink *pl, struct phylink_link_state *state)
342{
343 struct net_device *ndev = pl->netdev;
344
345 linkmode_copy(state->advertising, pl->link_config.advertising);
346 linkmode_zero(state->lp_advertising);
347 state->interface = pl->link_config.interface;
348 state->an_enabled = pl->link_config.an_enabled;
349 state->link = 1;
350
351 return pl->ops->mac_link_state(ndev, state);
352}
353
354/* The fixed state is... fixed except for the link state,
355 * which may be determined by a GPIO or a callback.
356 */
357static void phylink_get_fixed_state(struct phylink *pl, struct phylink_link_state *state)
358{
359 *state = pl->link_config;
360 if (pl->get_fixed_state)
361 pl->get_fixed_state(pl->netdev, state);
362 else if (pl->link_gpio)
363 state->link = !!gpiod_get_value(pl->link_gpio);
364}
365
366/* Flow control is resolved according to our and the link partners
367 * advertisements using the following drawn from the 802.3 specs:
368 * Local device Link partner
369 * Pause AsymDir Pause AsymDir Result
370 * 1 X 1 X TX+RX
371 * 0 1 1 1 RX
372 * 1 1 0 1 TX
373 */
374static void phylink_resolve_flow(struct phylink *pl,
375 struct phylink_link_state *state)
376{
377 int new_pause = 0;
378
379 if (pl->link_config.pause & MLO_PAUSE_AN) {
380 int pause = 0;
381
382 if (phylink_test(pl->link_config.advertising, Pause))
383 pause |= MLO_PAUSE_SYM;
384 if (phylink_test(pl->link_config.advertising, Asym_Pause))
385 pause |= MLO_PAUSE_ASYM;
386
387 pause &= state->pause;
388
389 if (pause & MLO_PAUSE_SYM)
390 new_pause = MLO_PAUSE_TX | MLO_PAUSE_RX;
391 else if (pause & MLO_PAUSE_ASYM)
392 new_pause = state->pause & MLO_PAUSE_SYM ?
393 MLO_PAUSE_RX : MLO_PAUSE_TX;
394 } else {
395 new_pause = pl->link_config.pause & MLO_PAUSE_TXRX_MASK;
396 }
397
398 state->pause &= ~MLO_PAUSE_TXRX_MASK;
399 state->pause |= new_pause;
400}
401
402static const char *phylink_pause_to_str(int pause)
403{
404 switch (pause & MLO_PAUSE_TXRX_MASK) {
405 case MLO_PAUSE_TX | MLO_PAUSE_RX:
406 return "rx/tx";
407 case MLO_PAUSE_TX:
408 return "tx";
409 case MLO_PAUSE_RX:
410 return "rx";
411 default:
412 return "off";
413 }
414}
415
416static void phylink_resolve(struct work_struct *w)
417{
418 struct phylink *pl = container_of(w, struct phylink, resolve);
419 struct phylink_link_state link_state;
420 struct net_device *ndev = pl->netdev;
421
422 mutex_lock(&pl->state_mutex);
423 if (pl->phylink_disable_state) {
424 pl->mac_link_dropped = false;
425 link_state.link = false;
426 } else if (pl->mac_link_dropped) {
427 link_state.link = false;
428 } else {
429 switch (pl->link_an_mode) {
430 case MLO_AN_PHY:
431 link_state = pl->phy_state;
432 phylink_resolve_flow(pl, &link_state);
433 phylink_mac_config(pl, &link_state);
434 break;
435
436 case MLO_AN_FIXED:
437 phylink_get_fixed_state(pl, &link_state);
438 phylink_mac_config(pl, &link_state);
439 break;
440
441 case MLO_AN_INBAND:
442 phylink_get_mac_state(pl, &link_state);
443 if (pl->phydev) {
444 bool changed = false;
445
446 link_state.link = link_state.link &&
447 pl->phy_state.link;
448
449 if (pl->phy_state.interface !=
450 link_state.interface) {
451 link_state.interface = pl->phy_state.interface;
452 changed = true;
453 }
454
455 /* Propagate the flow control from the PHY
456 * to the MAC. Also propagate the interface
457 * if changed.
458 */
459 if (pl->phy_state.link || changed) {
460 link_state.pause |= pl->phy_state.pause;
461 phylink_resolve_flow(pl, &link_state);
462
463 phylink_mac_config(pl, &link_state);
464 }
465 }
466 break;
467 }
468 }
469
470 if (link_state.link != netif_carrier_ok(ndev)) {
471 if (!link_state.link) {
472 netif_carrier_off(ndev);
473 pl->ops->mac_link_down(ndev, pl->link_an_mode,
474 pl->phy_state.interface);
475 netdev_info(ndev, "Link is Down\n");
476 } else {
477 pl->ops->mac_link_up(ndev, pl->link_an_mode,
478 pl->phy_state.interface,
479 pl->phydev);
480
481 netif_carrier_on(ndev);
482
483 netdev_info(ndev,
484 "Link is Up - %s/%s - flow control %s\n",
485 phy_speed_to_str(link_state.speed),
486 phy_duplex_to_str(link_state.duplex),
487 phylink_pause_to_str(link_state.pause));
488 }
489 }
490 if (!link_state.link && pl->mac_link_dropped) {
491 pl->mac_link_dropped = false;
492 queue_work(system_power_efficient_wq, &pl->resolve);
493 }
494 mutex_unlock(&pl->state_mutex);
495}
496
497static void phylink_run_resolve(struct phylink *pl)
498{
499 if (!pl->phylink_disable_state)
500 queue_work(system_power_efficient_wq, &pl->resolve);
501}
502
503static const struct sfp_upstream_ops sfp_phylink_ops;
504
505static int phylink_register_sfp(struct phylink *pl,
506 struct fwnode_handle *fwnode)
507{
508 struct fwnode_reference_args ref;
509 int ret;
510
511 if (!fwnode)
512 return 0;
513
514 ret = fwnode_property_get_reference_args(fwnode, "sfp", NULL,
515 0, 0, &ref);
516 if (ret < 0) {
517 if (ret == -ENOENT)
518 return 0;
519
520 netdev_err(pl->netdev, "unable to parse \"sfp\" node: %d\n",
521 ret);
522 return ret;
523 }
524
525 pl->sfp_bus = sfp_register_upstream(ref.fwnode, pl->netdev, pl,
526 &sfp_phylink_ops);
527 if (!pl->sfp_bus)
528 return -ENOMEM;
529
530 return 0;
531}
532
533/**
534 * phylink_create() - create a phylink instance
535 * @ndev: a pointer to the &struct net_device
536 * @fwnode: a pointer to a &struct fwnode_handle describing the network
537 * interface
538 * @iface: the desired link mode defined by &typedef phy_interface_t
539 * @ops: a pointer to a &struct phylink_mac_ops for the MAC.
540 *
541 * Create a new phylink instance, and parse the link parameters found in @np.
542 * This will parse in-band modes, fixed-link or SFP configuration.
543 *
544 * Returns a pointer to a &struct phylink, or an error-pointer value. Users
545 * must use IS_ERR() to check for errors from this function.
546 */
547struct phylink *phylink_create(struct net_device *ndev,
548 struct fwnode_handle *fwnode,
549 phy_interface_t iface,
550 const struct phylink_mac_ops *ops)
551{
552 struct phylink *pl;
553 int ret;
554
555 pl = kzalloc(sizeof(*pl), GFP_KERNEL);
556 if (!pl)
557 return ERR_PTR(-ENOMEM);
558
559 mutex_init(&pl->state_mutex);
560 INIT_WORK(&pl->resolve, phylink_resolve);
561 pl->netdev = ndev;
562 pl->phy_state.interface = iface;
563 pl->link_interface = iface;
564 if (iface == PHY_INTERFACE_MODE_MOCA)
565 pl->link_port = PORT_BNC;
566 else
567 pl->link_port = PORT_MII;
568 pl->link_config.interface = iface;
569 pl->link_config.pause = MLO_PAUSE_AN;
570 pl->link_config.speed = SPEED_UNKNOWN;
571 pl->link_config.duplex = DUPLEX_UNKNOWN;
572 pl->link_config.an_enabled = true;
573 pl->ops = ops;
574 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
575
576 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
577 linkmode_copy(pl->link_config.advertising, pl->supported);
578 phylink_validate(pl, pl->supported, &pl->link_config);
579
580 ret = phylink_parse_mode(pl, fwnode);
581 if (ret < 0) {
582 kfree(pl);
583 return ERR_PTR(ret);
584 }
585
586 if (pl->link_an_mode == MLO_AN_FIXED) {
587 ret = phylink_parse_fixedlink(pl, fwnode);
588 if (ret < 0) {
589 kfree(pl);
590 return ERR_PTR(ret);
591 }
592 }
593
594 ret = phylink_register_sfp(pl, fwnode);
595 if (ret < 0) {
596 kfree(pl);
597 return ERR_PTR(ret);
598 }
599
600 return pl;
601}
602EXPORT_SYMBOL_GPL(phylink_create);
603
604/**
605 * phylink_destroy() - cleanup and destroy the phylink instance
606 * @pl: a pointer to a &struct phylink returned from phylink_create()
607 *
608 * Destroy a phylink instance. Any PHY that has been attached must have been
609 * cleaned up via phylink_disconnect_phy() prior to calling this function.
610 */
611void phylink_destroy(struct phylink *pl)
612{
613 if (pl->sfp_bus)
614 sfp_unregister_upstream(pl->sfp_bus);
615
616 cancel_work_sync(&pl->resolve);
617 kfree(pl);
618}
619EXPORT_SYMBOL_GPL(phylink_destroy);
620
621static void phylink_phy_change(struct phy_device *phydev, bool up,
622 bool do_carrier)
623{
624 struct phylink *pl = phydev->phylink;
625
626 mutex_lock(&pl->state_mutex);
627 pl->phy_state.speed = phydev->speed;
628 pl->phy_state.duplex = phydev->duplex;
629 pl->phy_state.pause = MLO_PAUSE_NONE;
630 if (phydev->pause)
631 pl->phy_state.pause |= MLO_PAUSE_SYM;
632 if (phydev->asym_pause)
633 pl->phy_state.pause |= MLO_PAUSE_ASYM;
634 pl->phy_state.interface = phydev->interface;
635 pl->phy_state.link = up;
636 mutex_unlock(&pl->state_mutex);
637
638 phylink_run_resolve(pl);
639
640 netdev_dbg(pl->netdev, "phy link %s %s/%s/%s\n", up ? "up" : "down",
641 phy_modes(phydev->interface),
642 phy_speed_to_str(phydev->speed),
643 phy_duplex_to_str(phydev->duplex));
644}
645
646static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy)
647{
648 struct phylink_link_state config;
649 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
650 u32 advertising;
651 int ret;
652
653 memset(&config, 0, sizeof(config));
654 ethtool_convert_legacy_u32_to_link_mode(supported, phy->supported);
655 ethtool_convert_legacy_u32_to_link_mode(config.advertising,
656 phy->advertising);
657 config.interface = pl->link_config.interface;
658
659 /*
660 * This is the new way of dealing with flow control for PHYs,
661 * as described by Timur Tabi in commit 529ed1275263 ("net: phy:
662 * phy drivers should not set SUPPORTED_[Asym_]Pause") except
663 * using our validate call to the MAC, we rely upon the MAC
664 * clearing the bits from both supported and advertising fields.
665 */
666 if (phylink_test(supported, Pause))
667 phylink_set(config.advertising, Pause);
668 if (phylink_test(supported, Asym_Pause))
669 phylink_set(config.advertising, Asym_Pause);
670
671 ret = phylink_validate(pl, supported, &config);
672 if (ret)
673 return ret;
674
675 phy->phylink = pl;
676 phy->phy_link_change = phylink_phy_change;
677
678 netdev_info(pl->netdev,
679 "PHY [%s] driver [%s]\n", dev_name(&phy->mdio.dev),
680 phy->drv->name);
681
682 mutex_lock(&phy->lock);
683 mutex_lock(&pl->state_mutex);
684 pl->phydev = phy;
685 linkmode_copy(pl->supported, supported);
686 linkmode_copy(pl->link_config.advertising, config.advertising);
687
688 /* Restrict the phy advertisement according to the MAC support. */
689 ethtool_convert_link_mode_to_legacy_u32(&advertising, config.advertising);
690 phy->advertising = advertising;
691 mutex_unlock(&pl->state_mutex);
692 mutex_unlock(&phy->lock);
693
694 netdev_dbg(pl->netdev,
695 "phy: setting supported %*pb advertising 0x%08x\n",
696 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported,
697 phy->advertising);
698
699 phy_start_machine(phy);
700 if (phy->irq > 0)
701 phy_start_interrupts(phy);
702
703 return 0;
704}
705
706/**
707 * phylink_connect_phy() - connect a PHY to the phylink instance
708 * @pl: a pointer to a &struct phylink returned from phylink_create()
709 * @phy: a pointer to a &struct phy_device.
710 *
711 * Connect @phy to the phylink instance specified by @pl by calling
712 * phy_attach_direct(). Configure the @phy according to the MAC driver's
713 * capabilities, start the PHYLIB state machine and enable any interrupts
714 * that the PHY supports.
715 *
716 * This updates the phylink's ethtool supported and advertising link mode
717 * masks.
718 *
719 * Returns 0 on success or a negative errno.
720 */
721int phylink_connect_phy(struct phylink *pl, struct phy_device *phy)
722{
723 int ret;
724
725 if (WARN_ON(pl->link_an_mode == MLO_AN_FIXED ||
726 (pl->link_an_mode == MLO_AN_INBAND &&
727 phy_interface_mode_is_8023z(pl->link_interface))))
728 return -EINVAL;
729
730 if (pl->phydev)
731 return -EBUSY;
732
733 /* Use PHY device/driver interface */
734 if (pl->link_interface == PHY_INTERFACE_MODE_NA) {
735 pl->link_interface = phy->interface;
736 pl->link_config.interface = pl->link_interface;
737 }
738
739 ret = phy_attach_direct(pl->netdev, phy, 0, pl->link_interface);
740 if (ret)
741 return ret;
742
743 ret = phylink_bringup_phy(pl, phy);
744 if (ret)
745 phy_detach(phy);
746
747 return ret;
748}
749EXPORT_SYMBOL_GPL(phylink_connect_phy);
750
751/**
752 * phylink_of_phy_connect() - connect the PHY specified in the DT mode.
753 * @pl: a pointer to a &struct phylink returned from phylink_create()
754 * @dn: a pointer to a &struct device_node.
755 * @flags: PHY-specific flags to communicate to the PHY device driver
756 *
757 * Connect the phy specified in the device node @dn to the phylink instance
758 * specified by @pl. Actions specified in phylink_connect_phy() will be
759 * performed.
760 *
761 * Returns 0 on success or a negative errno.
762 */
763int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn,
764 u32 flags)
765{
766 struct device_node *phy_node;
767 struct phy_device *phy_dev;
768 int ret;
769
770 /* Fixed links and 802.3z are handled without needing a PHY */
771 if (pl->link_an_mode == MLO_AN_FIXED ||
772 (pl->link_an_mode == MLO_AN_INBAND &&
773 phy_interface_mode_is_8023z(pl->link_interface)))
774 return 0;
775
776 phy_node = of_parse_phandle(dn, "phy-handle", 0);
777 if (!phy_node)
778 phy_node = of_parse_phandle(dn, "phy", 0);
779 if (!phy_node)
780 phy_node = of_parse_phandle(dn, "phy-device", 0);
781
782 if (!phy_node) {
783 if (pl->link_an_mode == MLO_AN_PHY)
784 return -ENODEV;
785 return 0;
786 }
787
788 phy_dev = of_phy_attach(pl->netdev, phy_node, flags,
789 pl->link_interface);
790 /* We're done with the phy_node handle */
791 of_node_put(phy_node);
792
793 if (!phy_dev)
794 return -ENODEV;
795
796 ret = phylink_bringup_phy(pl, phy_dev);
797 if (ret)
798 phy_detach(phy_dev);
799
800 return ret;
801}
802EXPORT_SYMBOL_GPL(phylink_of_phy_connect);
803
804/**
805 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink
806 * instance.
807 * @pl: a pointer to a &struct phylink returned from phylink_create()
808 *
809 * Disconnect any current PHY from the phylink instance described by @pl.
810 */
811void phylink_disconnect_phy(struct phylink *pl)
812{
813 struct phy_device *phy;
814
815 ASSERT_RTNL();
816
817 phy = pl->phydev;
818 if (phy) {
819 mutex_lock(&phy->lock);
820 mutex_lock(&pl->state_mutex);
821 pl->phydev = NULL;
822 mutex_unlock(&pl->state_mutex);
823 mutex_unlock(&phy->lock);
824 flush_work(&pl->resolve);
825
826 phy_disconnect(phy);
827 }
828}
829EXPORT_SYMBOL_GPL(phylink_disconnect_phy);
830
831/**
832 * phylink_fixed_state_cb() - allow setting a fixed link callback
833 * @pl: a pointer to a &struct phylink returned from phylink_create()
834 * @cb: callback to execute to determine the fixed link state.
835 *
836 * The MAC driver should call this driver when the state of its link
837 * can be determined through e.g: an out of band MMIO register.
838 */
839int phylink_fixed_state_cb(struct phylink *pl,
840 void (*cb)(struct net_device *dev,
841 struct phylink_link_state *state))
842{
843 /* It does not make sense to let the link be overriden unless we use
844 * MLO_AN_FIXED
845 */
846 if (pl->link_an_mode != MLO_AN_FIXED)
847 return -EINVAL;
848
849 mutex_lock(&pl->state_mutex);
850 pl->get_fixed_state = cb;
851 mutex_unlock(&pl->state_mutex);
852
853 return 0;
854}
855EXPORT_SYMBOL_GPL(phylink_fixed_state_cb);
856
857/**
858 * phylink_mac_change() - notify phylink of a change in MAC state
859 * @pl: a pointer to a &struct phylink returned from phylink_create()
860 * @up: indicates whether the link is currently up.
861 *
862 * The MAC driver should call this driver when the state of its link
863 * changes (eg, link failure, new negotiation results, etc.)
864 */
865void phylink_mac_change(struct phylink *pl, bool up)
866{
867 if (!up)
868 pl->mac_link_dropped = true;
869 phylink_run_resolve(pl);
870 netdev_dbg(pl->netdev, "mac link %s\n", up ? "up" : "down");
871}
872EXPORT_SYMBOL_GPL(phylink_mac_change);
873
874/**
875 * phylink_start() - start a phylink instance
876 * @pl: a pointer to a &struct phylink returned from phylink_create()
877 *
878 * Start the phylink instance specified by @pl, configuring the MAC for the
879 * desired link mode(s) and negotiation style. This should be called from the
880 * network device driver's &struct net_device_ops ndo_open() method.
881 */
882void phylink_start(struct phylink *pl)
883{
884 ASSERT_RTNL();
885
886 netdev_info(pl->netdev, "configuring for %s/%s link mode\n",
887 phylink_an_mode_str(pl->link_an_mode),
888 phy_modes(pl->link_config.interface));
889
890 /* Apply the link configuration to the MAC when starting. This allows
891 * a fixed-link to start with the correct parameters, and also
892 * ensures that we set the appropriate advertisement for Serdes links.
893 */
894 phylink_resolve_flow(pl, &pl->link_config);
895 phylink_mac_config(pl, &pl->link_config);
896
897 /* Restart autonegotiation if using 802.3z to ensure that the link
898 * parameters are properly negotiated. This is necessary for DSA
899 * switches using 802.3z negotiation to ensure they see our modes.
900 */
901 phylink_mac_an_restart(pl);
902
903 clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
904 phylink_run_resolve(pl);
905
906 if (pl->sfp_bus)
907 sfp_upstream_start(pl->sfp_bus);
908 if (pl->phydev)
909 phy_start(pl->phydev);
910}
911EXPORT_SYMBOL_GPL(phylink_start);
912
913/**
914 * phylink_stop() - stop a phylink instance
915 * @pl: a pointer to a &struct phylink returned from phylink_create()
916 *
917 * Stop the phylink instance specified by @pl. This should be called from the
918 * network device driver's &struct net_device_ops ndo_stop() method. The
919 * network device's carrier state should not be changed prior to calling this
920 * function.
921 */
922void phylink_stop(struct phylink *pl)
923{
924 ASSERT_RTNL();
925
926 if (pl->phydev)
927 phy_stop(pl->phydev);
928 if (pl->sfp_bus)
929 sfp_upstream_stop(pl->sfp_bus);
930
931 set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
932 queue_work(system_power_efficient_wq, &pl->resolve);
933 flush_work(&pl->resolve);
934}
935EXPORT_SYMBOL_GPL(phylink_stop);
936
937/**
938 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY
939 * @pl: a pointer to a &struct phylink returned from phylink_create()
940 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters
941 *
942 * Read the wake on lan parameters from the PHY attached to the phylink
943 * instance specified by @pl. If no PHY is currently attached, report no
944 * support for wake on lan.
945 */
946void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
947{
948 ASSERT_RTNL();
949
950 wol->supported = 0;
951 wol->wolopts = 0;
952
953 if (pl->phydev)
954 phy_ethtool_get_wol(pl->phydev, wol);
955}
956EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol);
957
958/**
959 * phylink_ethtool_set_wol() - set wake on lan parameters
960 * @pl: a pointer to a &struct phylink returned from phylink_create()
961 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters
962 *
963 * Set the wake on lan parameters for the PHY attached to the phylink
964 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP
965 * error.
966 *
967 * Returns zero on success or negative errno code.
968 */
969int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
970{
971 int ret = -EOPNOTSUPP;
972
973 ASSERT_RTNL();
974
975 if (pl->phydev)
976 ret = phy_ethtool_set_wol(pl->phydev, wol);
977
978 return ret;
979}
980EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol);
981
982static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b)
983{
984 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask);
985
986 linkmode_zero(mask);
987 phylink_set_port_modes(mask);
988
989 linkmode_and(dst, dst, mask);
990 linkmode_or(dst, dst, b);
991}
992
993static void phylink_get_ksettings(const struct phylink_link_state *state,
994 struct ethtool_link_ksettings *kset)
995{
996 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising);
997 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising);
998 kset->base.speed = state->speed;
999 kset->base.duplex = state->duplex;
1000 kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE :
1001 AUTONEG_DISABLE;
1002}
1003
1004/**
1005 * phylink_ethtool_ksettings_get() - get the current link settings
1006 * @pl: a pointer to a &struct phylink returned from phylink_create()
1007 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings
1008 *
1009 * Read the current link settings for the phylink instance specified by @pl.
1010 * This will be the link settings read from the MAC, PHY or fixed link
1011 * settings depending on the current negotiation mode.
1012 */
1013int phylink_ethtool_ksettings_get(struct phylink *pl,
1014 struct ethtool_link_ksettings *kset)
1015{
1016 struct phylink_link_state link_state;
1017
1018 ASSERT_RTNL();
1019
1020 if (pl->phydev) {
1021 phy_ethtool_ksettings_get(pl->phydev, kset);
1022 } else {
1023 kset->base.port = pl->link_port;
1024 }
1025
1026 linkmode_copy(kset->link_modes.supported, pl->supported);
1027
1028 switch (pl->link_an_mode) {
1029 case MLO_AN_FIXED:
1030 /* We are using fixed settings. Report these as the
1031 * current link settings - and note that these also
1032 * represent the supported speeds/duplex/pause modes.
1033 */
1034 phylink_get_fixed_state(pl, &link_state);
1035 phylink_get_ksettings(&link_state, kset);
1036 break;
1037
1038 case MLO_AN_INBAND:
1039 /* If there is a phy attached, then use the reported
1040 * settings from the phy with no modification.
1041 */
1042 if (pl->phydev)
1043 break;
1044
1045 phylink_get_mac_state(pl, &link_state);
1046
1047 /* The MAC is reporting the link results from its own PCS
1048 * layer via in-band status. Report these as the current
1049 * link settings.
1050 */
1051 phylink_get_ksettings(&link_state, kset);
1052 break;
1053 }
1054
1055 return 0;
1056}
1057EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get);
1058
1059/**
1060 * phylink_ethtool_ksettings_set() - set the link settings
1061 * @pl: a pointer to a &struct phylink returned from phylink_create()
1062 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes
1063 */
1064int phylink_ethtool_ksettings_set(struct phylink *pl,
1065 const struct ethtool_link_ksettings *kset)
1066{
1067 struct ethtool_link_ksettings our_kset;
1068 struct phylink_link_state config;
1069 int ret;
1070
1071 ASSERT_RTNL();
1072
1073 if (kset->base.autoneg != AUTONEG_DISABLE &&
1074 kset->base.autoneg != AUTONEG_ENABLE)
1075 return -EINVAL;
1076
1077 config = pl->link_config;
1078
1079 /* Mask out unsupported advertisements */
1080 linkmode_and(config.advertising, kset->link_modes.advertising,
1081 pl->supported);
1082
1083 /* FIXME: should we reject autoneg if phy/mac does not support it? */
1084 if (kset->base.autoneg == AUTONEG_DISABLE) {
1085 const struct phy_setting *s;
1086
1087 /* Autonegotiation disabled, select a suitable speed and
1088 * duplex.
1089 */
1090 s = phy_lookup_setting(kset->base.speed, kset->base.duplex,
1091 pl->supported,
1092 __ETHTOOL_LINK_MODE_MASK_NBITS, false);
1093 if (!s)
1094 return -EINVAL;
1095
1096 /* If we have a fixed link (as specified by firmware), refuse
1097 * to change link parameters.
1098 */
1099 if (pl->link_an_mode == MLO_AN_FIXED &&
1100 (s->speed != pl->link_config.speed ||
1101 s->duplex != pl->link_config.duplex))
1102 return -EINVAL;
1103
1104 config.speed = s->speed;
1105 config.duplex = s->duplex;
1106 config.an_enabled = false;
1107
1108 __clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising);
1109 } else {
1110 /* If we have a fixed link, refuse to enable autonegotiation */
1111 if (pl->link_an_mode == MLO_AN_FIXED)
1112 return -EINVAL;
1113
1114 config.speed = SPEED_UNKNOWN;
1115 config.duplex = DUPLEX_UNKNOWN;
1116 config.an_enabled = true;
1117
1118 __set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising);
1119 }
1120
1121 if (phylink_validate(pl, pl->supported, &config))
1122 return -EINVAL;
1123
1124 /* If autonegotiation is enabled, we must have an advertisement */
1125 if (config.an_enabled && phylink_is_empty_linkmode(config.advertising))
1126 return -EINVAL;
1127
1128 our_kset = *kset;
1129 linkmode_copy(our_kset.link_modes.advertising, config.advertising);
1130 our_kset.base.speed = config.speed;
1131 our_kset.base.duplex = config.duplex;
1132
1133 /* If we have a PHY, configure the phy */
1134 if (pl->phydev) {
1135 ret = phy_ethtool_ksettings_set(pl->phydev, &our_kset);
1136 if (ret)
1137 return ret;
1138 }
1139
1140 mutex_lock(&pl->state_mutex);
1141 /* Configure the MAC to match the new settings */
1142 linkmode_copy(pl->link_config.advertising, our_kset.link_modes.advertising);
1143 pl->link_config.interface = config.interface;
1144 pl->link_config.speed = our_kset.base.speed;
1145 pl->link_config.duplex = our_kset.base.duplex;
1146 pl->link_config.an_enabled = our_kset.base.autoneg != AUTONEG_DISABLE;
1147
1148 if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) {
1149 phylink_mac_config(pl, &pl->link_config);
1150 phylink_mac_an_restart(pl);
1151 }
1152 mutex_unlock(&pl->state_mutex);
1153
1154 return 0;
1155}
1156EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set);
1157
1158/**
1159 * phylink_ethtool_nway_reset() - restart negotiation
1160 * @pl: a pointer to a &struct phylink returned from phylink_create()
1161 *
1162 * Restart negotiation for the phylink instance specified by @pl. This will
1163 * cause any attached phy to restart negotiation with the link partner, and
1164 * if the MAC is in a BaseX mode, the MAC will also be requested to restart
1165 * negotiation.
1166 *
1167 * Returns zero on success, or negative error code.
1168 */
1169int phylink_ethtool_nway_reset(struct phylink *pl)
1170{
1171 int ret = 0;
1172
1173 ASSERT_RTNL();
1174
1175 if (pl->phydev)
1176 ret = phy_restart_aneg(pl->phydev);
1177 phylink_mac_an_restart(pl);
1178
1179 return ret;
1180}
1181EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset);
1182
1183/**
1184 * phylink_ethtool_get_pauseparam() - get the current pause parameters
1185 * @pl: a pointer to a &struct phylink returned from phylink_create()
1186 * @pause: a pointer to a &struct ethtool_pauseparam
1187 */
1188void phylink_ethtool_get_pauseparam(struct phylink *pl,
1189 struct ethtool_pauseparam *pause)
1190{
1191 ASSERT_RTNL();
1192
1193 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN);
1194 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX);
1195 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX);
1196}
1197EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam);
1198
1199/**
1200 * phylink_ethtool_set_pauseparam() - set the current pause parameters
1201 * @pl: a pointer to a &struct phylink returned from phylink_create()
1202 * @pause: a pointer to a &struct ethtool_pauseparam
1203 */
1204int phylink_ethtool_set_pauseparam(struct phylink *pl,
1205 struct ethtool_pauseparam *pause)
1206{
1207 struct phylink_link_state *config = &pl->link_config;
1208
1209 ASSERT_RTNL();
1210
1211 if (!phylink_test(pl->supported, Pause) &&
1212 !phylink_test(pl->supported, Asym_Pause))
1213 return -EOPNOTSUPP;
1214
1215 if (!phylink_test(pl->supported, Asym_Pause) &&
1216 !pause->autoneg && pause->rx_pause != pause->tx_pause)
1217 return -EINVAL;
1218
1219 config->pause &= ~(MLO_PAUSE_AN | MLO_PAUSE_TXRX_MASK);
1220
1221 if (pause->autoneg)
1222 config->pause |= MLO_PAUSE_AN;
1223 if (pause->rx_pause)
1224 config->pause |= MLO_PAUSE_RX;
1225 if (pause->tx_pause)
1226 config->pause |= MLO_PAUSE_TX;
1227
1228 if (!test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state)) {
1229 switch (pl->link_an_mode) {
1230 case MLO_AN_PHY:
1231 /* Silently mark the carrier down, and then trigger a resolve */
1232 netif_carrier_off(pl->netdev);
1233 phylink_run_resolve(pl);
1234 break;
1235
1236 case MLO_AN_FIXED:
1237 /* Should we allow fixed links to change against the config? */
1238 phylink_resolve_flow(pl, config);
1239 phylink_mac_config(pl, config);
1240 break;
1241
1242 case MLO_AN_INBAND:
1243 phylink_mac_config(pl, config);
1244 phylink_mac_an_restart(pl);
1245 break;
1246 }
1247 }
1248
1249 return 0;
1250}
1251EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam);
1252
1253/**
1254 * phylink_ethtool_get_eee_err() - read the energy efficient ethernet error
1255 * counter
1256 * @pl: a pointer to a &struct phylink returned from phylink_create().
1257 *
1258 * Read the Energy Efficient Ethernet error counter from the PHY associated
1259 * with the phylink instance specified by @pl.
1260 *
1261 * Returns positive error counter value, or negative error code.
1262 */
1263int phylink_get_eee_err(struct phylink *pl)
1264{
1265 int ret = 0;
1266
1267 ASSERT_RTNL();
1268
1269 if (pl->phydev)
1270 ret = phy_get_eee_err(pl->phydev);
1271
1272 return ret;
1273}
1274EXPORT_SYMBOL_GPL(phylink_get_eee_err);
1275
1276/**
1277 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters
1278 * @pl: a pointer to a &struct phylink returned from phylink_create()
1279 * @eee: a pointer to a &struct ethtool_eee for the read parameters
1280 */
1281int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee)
1282{
1283 int ret = -EOPNOTSUPP;
1284
1285 ASSERT_RTNL();
1286
1287 if (pl->phydev)
1288 ret = phy_ethtool_get_eee(pl->phydev, eee);
1289
1290 return ret;
1291}
1292EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee);
1293
1294/**
1295 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters
1296 * @pl: a pointer to a &struct phylink returned from phylink_create()
1297 * @eee: a pointer to a &struct ethtool_eee for the desired parameters
1298 */
1299int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee)
1300{
1301 int ret = -EOPNOTSUPP;
1302
1303 ASSERT_RTNL();
1304
1305 if (pl->phydev)
1306 ret = phy_ethtool_set_eee(pl->phydev, eee);
1307
1308 return ret;
1309}
1310EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee);
1311
1312/* This emulates MII registers for a fixed-mode phy operating as per the
1313 * passed in state. "aneg" defines if we report negotiation is possible.
1314 *
1315 * FIXME: should deal with negotiation state too.
1316 */
1317static int phylink_mii_emul_read(struct net_device *ndev, unsigned int reg,
1318 struct phylink_link_state *state, bool aneg)
1319{
1320 struct fixed_phy_status fs;
1321 int val;
1322
1323 fs.link = state->link;
1324 fs.speed = state->speed;
1325 fs.duplex = state->duplex;
1326 fs.pause = state->pause & MLO_PAUSE_SYM;
1327 fs.asym_pause = state->pause & MLO_PAUSE_ASYM;
1328
1329 val = swphy_read_reg(reg, &fs);
1330 if (reg == MII_BMSR) {
1331 if (!state->an_complete)
1332 val &= ~BMSR_ANEGCOMPLETE;
1333 if (!aneg)
1334 val &= ~BMSR_ANEGCAPABLE;
1335 }
1336 return val;
1337}
1338
1339static int phylink_phy_read(struct phylink *pl, unsigned int phy_id,
1340 unsigned int reg)
1341{
1342 struct phy_device *phydev = pl->phydev;
1343 int prtad, devad;
1344
1345 if (mdio_phy_id_is_c45(phy_id)) {
1346 prtad = mdio_phy_id_prtad(phy_id);
1347 devad = mdio_phy_id_devad(phy_id);
1348 devad = MII_ADDR_C45 | devad << 16 | reg;
1349 } else if (phydev->is_c45) {
1350 switch (reg) {
1351 case MII_BMCR:
1352 case MII_BMSR:
1353 case MII_PHYSID1:
1354 case MII_PHYSID2:
1355 devad = __ffs(phydev->c45_ids.devices_in_package);
1356 break;
1357 case MII_ADVERTISE:
1358 case MII_LPA:
1359 if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN))
1360 return -EINVAL;
1361 devad = MDIO_MMD_AN;
1362 if (reg == MII_ADVERTISE)
1363 reg = MDIO_AN_ADVERTISE;
1364 else
1365 reg = MDIO_AN_LPA;
1366 break;
1367 default:
1368 return -EINVAL;
1369 }
1370 prtad = phy_id;
1371 devad = MII_ADDR_C45 | devad << 16 | reg;
1372 } else {
1373 prtad = phy_id;
1374 devad = reg;
1375 }
1376 return mdiobus_read(pl->phydev->mdio.bus, prtad, devad);
1377}
1378
1379static int phylink_phy_write(struct phylink *pl, unsigned int phy_id,
1380 unsigned int reg, unsigned int val)
1381{
1382 struct phy_device *phydev = pl->phydev;
1383 int prtad, devad;
1384
1385 if (mdio_phy_id_is_c45(phy_id)) {
1386 prtad = mdio_phy_id_prtad(phy_id);
1387 devad = mdio_phy_id_devad(phy_id);
1388 devad = MII_ADDR_C45 | devad << 16 | reg;
1389 } else if (phydev->is_c45) {
1390 switch (reg) {
1391 case MII_BMCR:
1392 case MII_BMSR:
1393 case MII_PHYSID1:
1394 case MII_PHYSID2:
1395 devad = __ffs(phydev->c45_ids.devices_in_package);
1396 break;
1397 case MII_ADVERTISE:
1398 case MII_LPA:
1399 if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN))
1400 return -EINVAL;
1401 devad = MDIO_MMD_AN;
1402 if (reg == MII_ADVERTISE)
1403 reg = MDIO_AN_ADVERTISE;
1404 else
1405 reg = MDIO_AN_LPA;
1406 break;
1407 default:
1408 return -EINVAL;
1409 }
1410 prtad = phy_id;
1411 devad = MII_ADDR_C45 | devad << 16 | reg;
1412 } else {
1413 prtad = phy_id;
1414 devad = reg;
1415 }
1416
1417 return mdiobus_write(phydev->mdio.bus, prtad, devad, val);
1418}
1419
1420static int phylink_mii_read(struct phylink *pl, unsigned int phy_id,
1421 unsigned int reg)
1422{
1423 struct phylink_link_state state;
1424 int val = 0xffff;
1425
1426 switch (pl->link_an_mode) {
1427 case MLO_AN_FIXED:
1428 if (phy_id == 0) {
1429 phylink_get_fixed_state(pl, &state);
1430 val = phylink_mii_emul_read(pl->netdev, reg, &state,
1431 true);
1432 }
1433 break;
1434
1435 case MLO_AN_PHY:
1436 return -EOPNOTSUPP;
1437
1438 case MLO_AN_INBAND:
1439 if (phy_id == 0) {
1440 val = phylink_get_mac_state(pl, &state);
1441 if (val < 0)
1442 return val;
1443
1444 val = phylink_mii_emul_read(pl->netdev, reg, &state,
1445 true);
1446 }
1447 break;
1448 }
1449
1450 return val & 0xffff;
1451}
1452
1453static int phylink_mii_write(struct phylink *pl, unsigned int phy_id,
1454 unsigned int reg, unsigned int val)
1455{
1456 switch (pl->link_an_mode) {
1457 case MLO_AN_FIXED:
1458 break;
1459
1460 case MLO_AN_PHY:
1461 return -EOPNOTSUPP;
1462
1463 case MLO_AN_INBAND:
1464 break;
1465 }
1466
1467 return 0;
1468}
1469
1470/**
1471 * phylink_mii_ioctl() - generic mii ioctl interface
1472 * @pl: a pointer to a &struct phylink returned from phylink_create()
1473 * @ifr: a pointer to a &struct ifreq for socket ioctls
1474 * @cmd: ioctl cmd to execute
1475 *
1476 * Perform the specified MII ioctl on the PHY attached to the phylink instance
1477 * specified by @pl. If no PHY is attached, emulate the presence of the PHY.
1478 *
1479 * Returns: zero on success or negative error code.
1480 *
1481 * %SIOCGMIIPHY:
1482 * read register from the current PHY.
1483 * %SIOCGMIIREG:
1484 * read register from the specified PHY.
1485 * %SIOCSMIIREG:
1486 * set a register on the specified PHY.
1487 */
1488int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd)
1489{
1490 struct mii_ioctl_data *mii = if_mii(ifr);
1491 int ret;
1492
1493 ASSERT_RTNL();
1494
1495 if (pl->phydev) {
1496 /* PHYs only exist for MLO_AN_PHY and SGMII */
1497 switch (cmd) {
1498 case SIOCGMIIPHY:
1499 mii->phy_id = pl->phydev->mdio.addr;
1500 /* fall through */
1501
1502 case SIOCGMIIREG:
1503 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num);
1504 if (ret >= 0) {
1505 mii->val_out = ret;
1506 ret = 0;
1507 }
1508 break;
1509
1510 case SIOCSMIIREG:
1511 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num,
1512 mii->val_in);
1513 break;
1514
1515 default:
1516 ret = phy_mii_ioctl(pl->phydev, ifr, cmd);
1517 break;
1518 }
1519 } else {
1520 switch (cmd) {
1521 case SIOCGMIIPHY:
1522 mii->phy_id = 0;
1523 /* fall through */
1524
1525 case SIOCGMIIREG:
1526 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num);
1527 if (ret >= 0) {
1528 mii->val_out = ret;
1529 ret = 0;
1530 }
1531 break;
1532
1533 case SIOCSMIIREG:
1534 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num,
1535 mii->val_in);
1536 break;
1537
1538 default:
1539 ret = -EOPNOTSUPP;
1540 break;
1541 }
1542 }
1543
1544 return ret;
1545}
1546EXPORT_SYMBOL_GPL(phylink_mii_ioctl);
1547
1548static int phylink_sfp_module_insert(void *upstream,
1549 const struct sfp_eeprom_id *id)
1550{
1551 struct phylink *pl = upstream;
1552 __ETHTOOL_DECLARE_LINK_MODE_MASK(support) = { 0, };
1553 struct phylink_link_state config;
1554 phy_interface_t iface;
1555 int ret = 0;
1556 bool changed;
1557 u8 port;
1558
1559 ASSERT_RTNL();
1560
1561 sfp_parse_support(pl->sfp_bus, id, support);
1562 port = sfp_parse_port(pl->sfp_bus, id, support);
1563
1564 memset(&config, 0, sizeof(config));
1565 linkmode_copy(config.advertising, support);
1566 config.interface = PHY_INTERFACE_MODE_NA;
1567 config.speed = SPEED_UNKNOWN;
1568 config.duplex = DUPLEX_UNKNOWN;
1569 config.pause = MLO_PAUSE_AN;
1570 config.an_enabled = pl->link_config.an_enabled;
1571
1572 /* Ignore errors if we're expecting a PHY to attach later */
1573 ret = phylink_validate(pl, support, &config);
1574 if (ret) {
1575 netdev_err(pl->netdev, "validation with support %*pb failed: %d\n",
1576 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
1577 return ret;
1578 }
1579
1580 iface = sfp_select_interface(pl->sfp_bus, id, config.advertising);
1581 if (iface == PHY_INTERFACE_MODE_NA) {
1582 netdev_err(pl->netdev,
1583 "selection of interface failed, advertisement %*pb\n",
1584 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising);
1585 return -EINVAL;
1586 }
1587
1588 config.interface = iface;
1589 ret = phylink_validate(pl, support, &config);
1590 if (ret) {
1591 netdev_err(pl->netdev, "validation of %s/%s with support %*pb failed: %d\n",
1592 phylink_an_mode_str(MLO_AN_INBAND),
1593 phy_modes(config.interface),
1594 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
1595 return ret;
1596 }
1597
1598 netdev_dbg(pl->netdev, "requesting link mode %s/%s with support %*pb\n",
1599 phylink_an_mode_str(MLO_AN_INBAND),
1600 phy_modes(config.interface),
1601 __ETHTOOL_LINK_MODE_MASK_NBITS, support);
1602
1603 if (phy_interface_mode_is_8023z(iface) && pl->phydev)
1604 return -EINVAL;
1605
1606 changed = !bitmap_equal(pl->supported, support,
1607 __ETHTOOL_LINK_MODE_MASK_NBITS);
1608 if (changed) {
1609 linkmode_copy(pl->supported, support);
1610 linkmode_copy(pl->link_config.advertising, config.advertising);
1611 }
1612
1613 if (pl->link_an_mode != MLO_AN_INBAND ||
1614 pl->link_config.interface != config.interface) {
1615 pl->link_config.interface = config.interface;
1616 pl->link_an_mode = MLO_AN_INBAND;
1617
1618 changed = true;
1619
1620 netdev_info(pl->netdev, "switched to %s/%s link mode\n",
1621 phylink_an_mode_str(MLO_AN_INBAND),
1622 phy_modes(config.interface));
1623 }
1624
1625 pl->link_port = port;
1626
1627 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED,
1628 &pl->phylink_disable_state))
1629 phylink_mac_config(pl, &pl->link_config);
1630
1631 return ret;
1632}
1633
1634static void phylink_sfp_link_down(void *upstream)
1635{
1636 struct phylink *pl = upstream;
1637
1638 ASSERT_RTNL();
1639
1640 set_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state);
1641 queue_work(system_power_efficient_wq, &pl->resolve);
1642 flush_work(&pl->resolve);
1643}
1644
1645static void phylink_sfp_link_up(void *upstream)
1646{
1647 struct phylink *pl = upstream;
1648
1649 ASSERT_RTNL();
1650
1651 clear_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state);
1652 phylink_run_resolve(pl);
1653}
1654
1655static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy)
1656{
1657 return phylink_connect_phy(upstream, phy);
1658}
1659
1660static void phylink_sfp_disconnect_phy(void *upstream)
1661{
1662 phylink_disconnect_phy(upstream);
1663}
1664
1665static const struct sfp_upstream_ops sfp_phylink_ops = {
1666 .module_insert = phylink_sfp_module_insert,
1667 .link_up = phylink_sfp_link_up,
1668 .link_down = phylink_sfp_link_down,
1669 .connect_phy = phylink_sfp_connect_phy,
1670 .disconnect_phy = phylink_sfp_disconnect_phy,
1671};
1672
1673MODULE_LICENSE("GPL");