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dm writecache: add cond_resched to loop in persistent_memory_claim()
[linux/fpc-iii.git] / drivers / net / phy / phylink.c
blobac38bead1cd252868387dd73d813a72fe6e74af5
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/ethtool.h>
9 #include <linux/export.h>
10 #include <linux/gpio/consumer.h>
11 #include <linux/netdevice.h>
12 #include <linux/of.h>
13 #include <linux/of_mdio.h>
14 #include <linux/phy.h>
15 #include <linux/phy_fixed.h>
16 #include <linux/phylink.h>
17 #include <linux/rtnetlink.h>
18 #include <linux/spinlock.h>
19 #include <linux/timer.h>
20 #include <linux/workqueue.h>
21
22 #include "sfp.h"
23 #include "swphy.h"
24
25 #define SUPPORTED_INTERFACES \
26 (SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \
27 SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane)
28 #define ADVERTISED_INTERFACES \
29 (ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \
30 ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane)
31
32 enum {
33 PHYLINK_DISABLE_STOPPED,
34 PHYLINK_DISABLE_LINK,
35 };
36
37 /**
38 * struct phylink - internal data type for phylink
39 */
40 struct phylink {
41 /* private: */
42 struct net_device *netdev;
43 const struct phylink_mac_ops *mac_ops;
44 const struct phylink_pcs_ops *pcs_ops;
45 struct phylink_config *config;
46 struct device *dev;
47 unsigned int old_link_state:1;
48
49 unsigned long phylink_disable_state; /* bitmask of disables */
50 struct phy_device *phydev;
51 phy_interface_t link_interface; /* PHY_INTERFACE_xxx */
52 u8 cfg_link_an_mode; /* MLO_AN_xxx */
53 u8 cur_link_an_mode;
54 u8 link_port; /* The current non-phy ethtool port */
55 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
56
57 /* The link configuration settings */
58 struct phylink_link_state link_config;
59
60 /* The current settings */
61 phy_interface_t cur_interface;
62
63 struct gpio_desc *link_gpio;
64 unsigned int link_irq;
65 struct timer_list link_poll;
66 void (*get_fixed_state)(struct net_device *dev,
67 struct phylink_link_state *s);
68
69 struct mutex state_mutex;
70 struct phylink_link_state phy_state;
71 struct work_struct resolve;
72
73 bool mac_link_dropped;
74
75 struct sfp_bus *sfp_bus;
76 bool sfp_may_have_phy;
77 __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support);
78 u8 sfp_port;
79 };
80
81 #define phylink_printk(level, pl, fmt, ...) \
82 do { \
83 if ((pl)->config->type == PHYLINK_NETDEV) \
84 netdev_printk(level, (pl)->netdev, fmt, ##__VA_ARGS__); \
85 else if ((pl)->config->type == PHYLINK_DEV) \
86 dev_printk(level, (pl)->dev, fmt, ##__VA_ARGS__); \
87 } while (0)
88
89 #define phylink_err(pl, fmt, ...) \
90 phylink_printk(KERN_ERR, pl, fmt, ##__VA_ARGS__)
91 #define phylink_warn(pl, fmt, ...) \
92 phylink_printk(KERN_WARNING, pl, fmt, ##__VA_ARGS__)
93 #define phylink_info(pl, fmt, ...) \
94 phylink_printk(KERN_INFO, pl, fmt, ##__VA_ARGS__)
95 #if defined(CONFIG_DYNAMIC_DEBUG)
96 #define phylink_dbg(pl, fmt, ...) \
97 do { \
98 if ((pl)->config->type == PHYLINK_NETDEV) \
99 netdev_dbg((pl)->netdev, fmt, ##__VA_ARGS__); \
100 else if ((pl)->config->type == PHYLINK_DEV) \
101 dev_dbg((pl)->dev, fmt, ##__VA_ARGS__); \
102 } while (0)
103 #elif defined(DEBUG)
104 #define phylink_dbg(pl, fmt, ...) \
105 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__)
106 #else
107 #define phylink_dbg(pl, fmt, ...) \
108 ({ \
109 if (0) \
110 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__); \
111 })
112 #endif
113
114 /**
115 * phylink_set_port_modes() - set the port type modes in the ethtool mask
116 * @mask: ethtool link mode mask
117 *
118 * Sets all the port type modes in the ethtool mask. MAC drivers should
119 * use this in their 'validate' callback.
120 */
121 void phylink_set_port_modes(unsigned long *mask)
122 {
123 phylink_set(mask, TP);
124 phylink_set(mask, AUI);
125 phylink_set(mask, MII);
126 phylink_set(mask, FIBRE);
127 phylink_set(mask, BNC);
128 phylink_set(mask, Backplane);
129 }
130 EXPORT_SYMBOL_GPL(phylink_set_port_modes);
131
132 static int phylink_is_empty_linkmode(const unsigned long *linkmode)
133 {
134 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, };
135
136 phylink_set_port_modes(tmp);
137 phylink_set(tmp, Autoneg);
138 phylink_set(tmp, Pause);
139 phylink_set(tmp, Asym_Pause);
140
141 return linkmode_subset(linkmode, tmp);
142 }
143
144 static const char *phylink_an_mode_str(unsigned int mode)
145 {
146 static const char *modestr[] = {
147 [MLO_AN_PHY] = "phy",
148 [MLO_AN_FIXED] = "fixed",
149 [MLO_AN_INBAND] = "inband",
150 };
151
152 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown";
153 }
154
155 static int phylink_validate(struct phylink *pl, unsigned long *supported,
156 struct phylink_link_state *state)
157 {
158 pl->mac_ops->validate(pl->config, supported, state);
159
160 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0;
161 }
162
163 static int phylink_parse_fixedlink(struct phylink *pl,
164 struct fwnode_handle *fwnode)
165 {
166 struct fwnode_handle *fixed_node;
167 const struct phy_setting *s;
168 struct gpio_desc *desc;
169 u32 speed;
170 int ret;
171
172 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link");
173 if (fixed_node) {
174 ret = fwnode_property_read_u32(fixed_node, "speed", &speed);
175
176 pl->link_config.speed = speed;
177 pl->link_config.duplex = DUPLEX_HALF;
178
179 if (fwnode_property_read_bool(fixed_node, "full-duplex"))
180 pl->link_config.duplex = DUPLEX_FULL;
181
182 /* We treat the "pause" and "asym-pause" terminology as
183 * defining the link partner's ability. */
184 if (fwnode_property_read_bool(fixed_node, "pause"))
185 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
186 pl->link_config.lp_advertising);
187 if (fwnode_property_read_bool(fixed_node, "asym-pause"))
188 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
189 pl->link_config.lp_advertising);
190
191 if (ret == 0) {
192 desc = fwnode_gpiod_get_index(fixed_node, "link", 0,
193 GPIOD_IN, "?");
194
195 if (!IS_ERR(desc))
196 pl->link_gpio = desc;
197 else if (desc == ERR_PTR(-EPROBE_DEFER))
198 ret = -EPROBE_DEFER;
199 }
200 fwnode_handle_put(fixed_node);
201
202 if (ret)
203 return ret;
204 } else {
205 u32 prop[5];
206
207 ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
208 NULL, 0);
209 if (ret != ARRAY_SIZE(prop)) {
210 phylink_err(pl, "broken fixed-link?\n");
211 return -EINVAL;
212 }
213
214 ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
215 prop, ARRAY_SIZE(prop));
216 if (!ret) {
217 pl->link_config.duplex = prop[1] ?
218 DUPLEX_FULL : DUPLEX_HALF;
219 pl->link_config.speed = prop[2];
220 if (prop[3])
221 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
222 pl->link_config.lp_advertising);
223 if (prop[4])
224 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
225 pl->link_config.lp_advertising);
226 }
227 }
228
229 if (pl->link_config.speed > SPEED_1000 &&
230 pl->link_config.duplex != DUPLEX_FULL)
231 phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n",
232 pl->link_config.speed);
233
234 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
235 linkmode_copy(pl->link_config.advertising, pl->supported);
236 phylink_validate(pl, pl->supported, &pl->link_config);
237
238 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex,
239 pl->supported, true);
240 linkmode_zero(pl->supported);
241 phylink_set(pl->supported, MII);
242 phylink_set(pl->supported, Pause);
243 phylink_set(pl->supported, Asym_Pause);
244 if (s) {
245 __set_bit(s->bit, pl->supported);
246 } else {
247 phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n",
248 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half",
249 pl->link_config.speed);
250 }
251
252 linkmode_and(pl->link_config.advertising, pl->link_config.advertising,
253 pl->supported);
254
255 pl->link_config.link = 1;
256 pl->link_config.an_complete = 1;
257
258 return 0;
259 }
260
261 static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode)
262 {
263 struct fwnode_handle *dn;
264 const char *managed;
265
266 dn = fwnode_get_named_child_node(fwnode, "fixed-link");
267 if (dn || fwnode_property_present(fwnode, "fixed-link"))
268 pl->cfg_link_an_mode = MLO_AN_FIXED;
269 fwnode_handle_put(dn);
270
271 if (fwnode_property_read_string(fwnode, "managed", &managed) == 0 &&
272 strcmp(managed, "in-band-status") == 0) {
273 if (pl->cfg_link_an_mode == MLO_AN_FIXED) {
274 phylink_err(pl,
275 "can't use both fixed-link and in-band-status\n");
276 return -EINVAL;
277 }
278
279 linkmode_zero(pl->supported);
280 phylink_set(pl->supported, MII);
281 phylink_set(pl->supported, Autoneg);
282 phylink_set(pl->supported, Asym_Pause);
283 phylink_set(pl->supported, Pause);
284 pl->link_config.an_enabled = true;
285 pl->cfg_link_an_mode = MLO_AN_INBAND;
286
287 switch (pl->link_config.interface) {
288 case PHY_INTERFACE_MODE_SGMII:
289 case PHY_INTERFACE_MODE_QSGMII:
290 phylink_set(pl->supported, 10baseT_Half);
291 phylink_set(pl->supported, 10baseT_Full);
292 phylink_set(pl->supported, 100baseT_Half);
293 phylink_set(pl->supported, 100baseT_Full);
294 phylink_set(pl->supported, 1000baseT_Half);
295 phylink_set(pl->supported, 1000baseT_Full);
296 break;
297
298 case PHY_INTERFACE_MODE_1000BASEX:
299 phylink_set(pl->supported, 1000baseX_Full);
300 break;
301
302 case PHY_INTERFACE_MODE_2500BASEX:
303 phylink_set(pl->supported, 2500baseX_Full);
304 break;
305
306 case PHY_INTERFACE_MODE_USXGMII:
307 case PHY_INTERFACE_MODE_10GKR:
308 case PHY_INTERFACE_MODE_10GBASER:
309 phylink_set(pl->supported, 10baseT_Half);
310 phylink_set(pl->supported, 10baseT_Full);
311 phylink_set(pl->supported, 100baseT_Half);
312 phylink_set(pl->supported, 100baseT_Full);
313 phylink_set(pl->supported, 1000baseT_Half);
314 phylink_set(pl->supported, 1000baseT_Full);
315 phylink_set(pl->supported, 1000baseX_Full);
316 phylink_set(pl->supported, 1000baseKX_Full);
317 phylink_set(pl->supported, 2500baseT_Full);
318 phylink_set(pl->supported, 2500baseX_Full);
319 phylink_set(pl->supported, 5000baseT_Full);
320 phylink_set(pl->supported, 10000baseT_Full);
321 phylink_set(pl->supported, 10000baseKR_Full);
322 phylink_set(pl->supported, 10000baseKX4_Full);
323 phylink_set(pl->supported, 10000baseCR_Full);
324 phylink_set(pl->supported, 10000baseSR_Full);
325 phylink_set(pl->supported, 10000baseLR_Full);
326 phylink_set(pl->supported, 10000baseLRM_Full);
327 phylink_set(pl->supported, 10000baseER_Full);
328 break;
329
330 case PHY_INTERFACE_MODE_XLGMII:
331 phylink_set(pl->supported, 25000baseCR_Full);
332 phylink_set(pl->supported, 25000baseKR_Full);
333 phylink_set(pl->supported, 25000baseSR_Full);
334 phylink_set(pl->supported, 40000baseKR4_Full);
335 phylink_set(pl->supported, 40000baseCR4_Full);
336 phylink_set(pl->supported, 40000baseSR4_Full);
337 phylink_set(pl->supported, 40000baseLR4_Full);
338 phylink_set(pl->supported, 50000baseCR2_Full);
339 phylink_set(pl->supported, 50000baseKR2_Full);
340 phylink_set(pl->supported, 50000baseSR2_Full);
341 phylink_set(pl->supported, 50000baseKR_Full);
342 phylink_set(pl->supported, 50000baseSR_Full);
343 phylink_set(pl->supported, 50000baseCR_Full);
344 phylink_set(pl->supported, 50000baseLR_ER_FR_Full);
345 phylink_set(pl->supported, 50000baseDR_Full);
346 phylink_set(pl->supported, 100000baseKR4_Full);
347 phylink_set(pl->supported, 100000baseSR4_Full);
348 phylink_set(pl->supported, 100000baseCR4_Full);
349 phylink_set(pl->supported, 100000baseLR4_ER4_Full);
350 phylink_set(pl->supported, 100000baseKR2_Full);
351 phylink_set(pl->supported, 100000baseSR2_Full);
352 phylink_set(pl->supported, 100000baseCR2_Full);
353 phylink_set(pl->supported, 100000baseLR2_ER2_FR2_Full);
354 phylink_set(pl->supported, 100000baseDR2_Full);
355 break;
356
357 default:
358 phylink_err(pl,
359 "incorrect link mode %s for in-band status\n",
360 phy_modes(pl->link_config.interface));
361 return -EINVAL;
362 }
363
364 linkmode_copy(pl->link_config.advertising, pl->supported);
365
366 if (phylink_validate(pl, pl->supported, &pl->link_config)) {
367 phylink_err(pl,
368 "failed to validate link configuration for in-band status\n");
369 return -EINVAL;
370 }
371
372 /* Check if MAC/PCS also supports Autoneg. */
373 pl->link_config.an_enabled = phylink_test(pl->supported, Autoneg);
374 }
375
376 return 0;
377 }
378
379 static void phylink_apply_manual_flow(struct phylink *pl,
380 struct phylink_link_state *state)
381 {
382 /* If autoneg is disabled, pause AN is also disabled */
383 if (!state->an_enabled)
384 state->pause &= ~MLO_PAUSE_AN;
385
386 /* Manual configuration of pause modes */
387 if (!(pl->link_config.pause & MLO_PAUSE_AN))
388 state->pause = pl->link_config.pause;
389 }
390
391 static void phylink_resolve_flow(struct phylink_link_state *state)
392 {
393 bool tx_pause, rx_pause;
394
395 state->pause = MLO_PAUSE_NONE;
396 if (state->duplex == DUPLEX_FULL) {
397 linkmode_resolve_pause(state->advertising,
398 state->lp_advertising,
399 &tx_pause, &rx_pause);
400 if (tx_pause)
401 state->pause |= MLO_PAUSE_TX;
402 if (rx_pause)
403 state->pause |= MLO_PAUSE_RX;
404 }
405 }
406
407 static void phylink_mac_config(struct phylink *pl,
408 const struct phylink_link_state *state)
409 {
410 phylink_dbg(pl,
411 "%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n",
412 __func__, phylink_an_mode_str(pl->cur_link_an_mode),
413 phy_modes(state->interface),
414 phy_speed_to_str(state->speed),
415 phy_duplex_to_str(state->duplex),
416 __ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising,
417 state->pause, state->link, state->an_enabled);
418
419 pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, state);
420 }
421
422 static void phylink_mac_config_up(struct phylink *pl,
423 const struct phylink_link_state *state)
424 {
425 if (state->link)
426 phylink_mac_config(pl, state);
427 }
428
429 static void phylink_mac_pcs_an_restart(struct phylink *pl)
430 {
431 if (pl->link_config.an_enabled &&
432 phy_interface_mode_is_8023z(pl->link_config.interface)) {
433 if (pl->pcs_ops)
434 pl->pcs_ops->pcs_an_restart(pl->config);
435 else
436 pl->mac_ops->mac_an_restart(pl->config);
437 }
438 }
439
440 static void phylink_pcs_config(struct phylink *pl, bool force_restart,
441 const struct phylink_link_state *state)
442 {
443 bool restart = force_restart;
444
445 if (pl->pcs_ops && pl->pcs_ops->pcs_config(pl->config,
446 pl->cur_link_an_mode,
447 state->interface,
448 state->advertising))
449 restart = true;
450
451 phylink_mac_config(pl, state);
452
453 if (restart)
454 phylink_mac_pcs_an_restart(pl);
455 }
456
457 static void phylink_mac_pcs_get_state(struct phylink *pl,
458 struct phylink_link_state *state)
459 {
460 linkmode_copy(state->advertising, pl->link_config.advertising);
461 linkmode_zero(state->lp_advertising);
462 state->interface = pl->link_config.interface;
463 state->an_enabled = pl->link_config.an_enabled;
464 state->speed = SPEED_UNKNOWN;
465 state->duplex = DUPLEX_UNKNOWN;
466 state->pause = MLO_PAUSE_NONE;
467 state->an_complete = 0;
468 state->link = 1;
469
470 if (pl->pcs_ops)
471 pl->pcs_ops->pcs_get_state(pl->config, state);
472 else
473 pl->mac_ops->mac_pcs_get_state(pl->config, state);
474 }
475
476 /* The fixed state is... fixed except for the link state,
477 * which may be determined by a GPIO or a callback.
478 */
479 static void phylink_get_fixed_state(struct phylink *pl,
480 struct phylink_link_state *state)
481 {
482 *state = pl->link_config;
483 if (pl->get_fixed_state)
484 pl->get_fixed_state(pl->netdev, state);
485 else if (pl->link_gpio)
486 state->link = !!gpiod_get_value_cansleep(pl->link_gpio);
487
488 phylink_resolve_flow(state);
489 }
490
491 static void phylink_mac_initial_config(struct phylink *pl, bool force_restart)
492 {
493 struct phylink_link_state link_state;
494
495 switch (pl->cur_link_an_mode) {
496 case MLO_AN_PHY:
497 link_state = pl->phy_state;
498 break;
499
500 case MLO_AN_FIXED:
501 phylink_get_fixed_state(pl, &link_state);
502 break;
503
504 case MLO_AN_INBAND:
505 link_state = pl->link_config;
506 if (link_state.interface == PHY_INTERFACE_MODE_SGMII)
507 link_state.pause = MLO_PAUSE_NONE;
508 break;
509
510 default: /* can't happen */
511 return;
512 }
513
514 link_state.link = false;
515
516 phylink_apply_manual_flow(pl, &link_state);
517 phylink_pcs_config(pl, force_restart, &link_state);
518 }
519
520 static const char *phylink_pause_to_str(int pause)
521 {
522 switch (pause & MLO_PAUSE_TXRX_MASK) {
523 case MLO_PAUSE_TX | MLO_PAUSE_RX:
524 return "rx/tx";
525 case MLO_PAUSE_TX:
526 return "tx";
527 case MLO_PAUSE_RX:
528 return "rx";
529 default:
530 return "off";
531 }
532 }
533
534 static void phylink_link_up(struct phylink *pl,
535 struct phylink_link_state link_state)
536 {
537 struct net_device *ndev = pl->netdev;
538
539 pl->cur_interface = link_state.interface;
540
541 if (pl->pcs_ops && pl->pcs_ops->pcs_link_up)
542 pl->pcs_ops->pcs_link_up(pl->config, pl->cur_link_an_mode,
543 pl->cur_interface,
544 link_state.speed, link_state.duplex);
545
546 pl->mac_ops->mac_link_up(pl->config, pl->phydev,
547 pl->cur_link_an_mode, pl->cur_interface,
548 link_state.speed, link_state.duplex,
549 !!(link_state.pause & MLO_PAUSE_TX),
550 !!(link_state.pause & MLO_PAUSE_RX));
551
552 if (ndev)
553 netif_carrier_on(ndev);
554
555 phylink_info(pl,
556 "Link is Up - %s/%s - flow control %s\n",
557 phy_speed_to_str(link_state.speed),
558 phy_duplex_to_str(link_state.duplex),
559 phylink_pause_to_str(link_state.pause));
560 }
561
562 static void phylink_link_down(struct phylink *pl)
563 {
564 struct net_device *ndev = pl->netdev;
565
566 if (ndev)
567 netif_carrier_off(ndev);
568 pl->mac_ops->mac_link_down(pl->config, pl->cur_link_an_mode,
569 pl->cur_interface);
570 phylink_info(pl, "Link is Down\n");
571 }
572
573 static void phylink_resolve(struct work_struct *w)
574 {
575 struct phylink *pl = container_of(w, struct phylink, resolve);
576 struct phylink_link_state link_state;
577 struct net_device *ndev = pl->netdev;
578 int link_changed;
579
580 mutex_lock(&pl->state_mutex);
581 if (pl->phylink_disable_state) {
582 pl->mac_link_dropped = false;
583 link_state.link = false;
584 } else if (pl->mac_link_dropped) {
585 link_state.link = false;
586 } else {
587 switch (pl->cur_link_an_mode) {
588 case MLO_AN_PHY:
589 link_state = pl->phy_state;
590 phylink_apply_manual_flow(pl, &link_state);
591 phylink_mac_config_up(pl, &link_state);
592 break;
593
594 case MLO_AN_FIXED:
595 phylink_get_fixed_state(pl, &link_state);
596 phylink_mac_config_up(pl, &link_state);
597 break;
598
599 case MLO_AN_INBAND:
600 phylink_mac_pcs_get_state(pl, &link_state);
601
602 /* If we have a phy, the "up" state is the union of
603 * both the PHY and the MAC */
604 if (pl->phydev)
605 link_state.link &= pl->phy_state.link;
606
607 /* Only update if the PHY link is up */
608 if (pl->phydev && pl->phy_state.link) {
609 link_state.interface = pl->phy_state.interface;
610
611 /* If we have a PHY, we need to update with
612 * the PHY flow control bits. */
613 link_state.pause = pl->phy_state.pause;
614 phylink_apply_manual_flow(pl, &link_state);
615 phylink_mac_config(pl, &link_state);
616 } else {
617 phylink_apply_manual_flow(pl, &link_state);
618 }
619 break;
620 }
621 }
622
623 if (pl->netdev)
624 link_changed = (link_state.link != netif_carrier_ok(ndev));
625 else
626 link_changed = (link_state.link != pl->old_link_state);
627
628 if (link_changed) {
629 pl->old_link_state = link_state.link;
630 if (!link_state.link)
631 phylink_link_down(pl);
632 else
633 phylink_link_up(pl, link_state);
634 }
635 if (!link_state.link && pl->mac_link_dropped) {
636 pl->mac_link_dropped = false;
637 queue_work(system_power_efficient_wq, &pl->resolve);
638 }
639 mutex_unlock(&pl->state_mutex);
640 }
641
642 static void phylink_run_resolve(struct phylink *pl)
643 {
644 if (!pl->phylink_disable_state)
645 queue_work(system_power_efficient_wq, &pl->resolve);
646 }
647
648 static void phylink_run_resolve_and_disable(struct phylink *pl, int bit)
649 {
650 unsigned long state = pl->phylink_disable_state;
651
652 set_bit(bit, &pl->phylink_disable_state);
653 if (state == 0) {
654 queue_work(system_power_efficient_wq, &pl->resolve);
655 flush_work(&pl->resolve);
656 }
657 }
658
659 static void phylink_fixed_poll(struct timer_list *t)
660 {
661 struct phylink *pl = container_of(t, struct phylink, link_poll);
662
663 mod_timer(t, jiffies + HZ);
664
665 phylink_run_resolve(pl);
666 }
667
668 static const struct sfp_upstream_ops sfp_phylink_ops;
669
670 static int phylink_register_sfp(struct phylink *pl,
671 struct fwnode_handle *fwnode)
672 {
673 struct sfp_bus *bus;
674 int ret;
675
676 if (!fwnode)
677 return 0;
678
679 bus = sfp_bus_find_fwnode(fwnode);
680 if (IS_ERR(bus)) {
681 ret = PTR_ERR(bus);
682 phylink_err(pl, "unable to attach SFP bus: %d\n", ret);
683 return ret;
684 }
685
686 pl->sfp_bus = bus;
687
688 ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops);
689 sfp_bus_put(bus);
690
691 return ret;
692 }
693
694 /**
695 * phylink_create() - create a phylink instance
696 * @config: a pointer to the target &struct phylink_config
697 * @fwnode: a pointer to a &struct fwnode_handle describing the network
698 * interface
699 * @iface: the desired link mode defined by &typedef phy_interface_t
700 * @mac_ops: a pointer to a &struct phylink_mac_ops for the MAC.
701 *
702 * Create a new phylink instance, and parse the link parameters found in @np.
703 * This will parse in-band modes, fixed-link or SFP configuration.
704 *
705 * Note: the rtnl lock must not be held when calling this function.
706 *
707 * Returns a pointer to a &struct phylink, or an error-pointer value. Users
708 * must use IS_ERR() to check for errors from this function.
709 */
710 struct phylink *phylink_create(struct phylink_config *config,
711 struct fwnode_handle *fwnode,
712 phy_interface_t iface,
713 const struct phylink_mac_ops *mac_ops)
714 {
715 struct phylink *pl;
716 int ret;
717
718 pl = kzalloc(sizeof(*pl), GFP_KERNEL);
719 if (!pl)
720 return ERR_PTR(-ENOMEM);
721
722 mutex_init(&pl->state_mutex);
723 INIT_WORK(&pl->resolve, phylink_resolve);
724
725 pl->config = config;
726 if (config->type == PHYLINK_NETDEV) {
727 pl->netdev = to_net_dev(config->dev);
728 } else if (config->type == PHYLINK_DEV) {
729 pl->dev = config->dev;
730 } else {
731 kfree(pl);
732 return ERR_PTR(-EINVAL);
733 }
734
735 pl->phy_state.interface = iface;
736 pl->link_interface = iface;
737 if (iface == PHY_INTERFACE_MODE_MOCA)
738 pl->link_port = PORT_BNC;
739 else
740 pl->link_port = PORT_MII;
741 pl->link_config.interface = iface;
742 pl->link_config.pause = MLO_PAUSE_AN;
743 pl->link_config.speed = SPEED_UNKNOWN;
744 pl->link_config.duplex = DUPLEX_UNKNOWN;
745 pl->link_config.an_enabled = true;
746 pl->mac_ops = mac_ops;
747 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
748 timer_setup(&pl->link_poll, phylink_fixed_poll, 0);
749
750 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
751 linkmode_copy(pl->link_config.advertising, pl->supported);
752 phylink_validate(pl, pl->supported, &pl->link_config);
753
754 ret = phylink_parse_mode(pl, fwnode);
755 if (ret < 0) {
756 kfree(pl);
757 return ERR_PTR(ret);
758 }
759
760 if (pl->cfg_link_an_mode == MLO_AN_FIXED) {
761 ret = phylink_parse_fixedlink(pl, fwnode);
762 if (ret < 0) {
763 kfree(pl);
764 return ERR_PTR(ret);
765 }
766 }
767
768 pl->cur_link_an_mode = pl->cfg_link_an_mode;
769
770 ret = phylink_register_sfp(pl, fwnode);
771 if (ret < 0) {
772 kfree(pl);
773 return ERR_PTR(ret);
774 }
775
776 return pl;
777 }
778 EXPORT_SYMBOL_GPL(phylink_create);
779
780 void phylink_add_pcs(struct phylink *pl, const struct phylink_pcs_ops *ops)
781 {
782 pl->pcs_ops = ops;
783 }
784 EXPORT_SYMBOL_GPL(phylink_add_pcs);
785
786 /**
787 * phylink_destroy() - cleanup and destroy the phylink instance
788 * @pl: a pointer to a &struct phylink returned from phylink_create()
789 *
790 * Destroy a phylink instance. Any PHY that has been attached must have been
791 * cleaned up via phylink_disconnect_phy() prior to calling this function.
792 *
793 * Note: the rtnl lock must not be held when calling this function.
794 */
795 void phylink_destroy(struct phylink *pl)
796 {
797 sfp_bus_del_upstream(pl->sfp_bus);
798 if (pl->link_gpio)
799 gpiod_put(pl->link_gpio);
800
801 cancel_work_sync(&pl->resolve);
802 kfree(pl);
803 }
804 EXPORT_SYMBOL_GPL(phylink_destroy);
805
806 static void phylink_phy_change(struct phy_device *phydev, bool up,
807 bool do_carrier)
808 {
809 struct phylink *pl = phydev->phylink;
810 bool tx_pause, rx_pause;
811
812 phy_get_pause(phydev, &tx_pause, &rx_pause);
813
814 mutex_lock(&pl->state_mutex);
815 pl->phy_state.speed = phydev->speed;
816 pl->phy_state.duplex = phydev->duplex;
817 pl->phy_state.pause = MLO_PAUSE_NONE;
818 if (tx_pause)
819 pl->phy_state.pause |= MLO_PAUSE_TX;
820 if (rx_pause)
821 pl->phy_state.pause |= MLO_PAUSE_RX;
822 pl->phy_state.interface = phydev->interface;
823 pl->phy_state.link = up;
824 mutex_unlock(&pl->state_mutex);
825
826 phylink_run_resolve(pl);
827
828 phylink_dbg(pl, "phy link %s %s/%s/%s\n", up ? "up" : "down",
829 phy_modes(phydev->interface),
830 phy_speed_to_str(phydev->speed),
831 phy_duplex_to_str(phydev->duplex));
832 }
833
834 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy,
835 phy_interface_t interface)
836 {
837 struct phylink_link_state config;
838 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
839 char *irq_str;
840 int ret;
841
842 /*
843 * This is the new way of dealing with flow control for PHYs,
844 * as described by Timur Tabi in commit 529ed1275263 ("net: phy:
845 * phy drivers should not set SUPPORTED_[Asym_]Pause") except
846 * using our validate call to the MAC, we rely upon the MAC
847 * clearing the bits from both supported and advertising fields.
848 */
849 phy_support_asym_pause(phy);
850
851 memset(&config, 0, sizeof(config));
852 linkmode_copy(supported, phy->supported);
853 linkmode_copy(config.advertising, phy->advertising);
854
855 /* Clause 45 PHYs switch their Serdes lane between several different
856 * modes, normally 10GBASE-R, SGMII. Some use 2500BASE-X for 2.5G
857 * speeds. We really need to know which interface modes the PHY and
858 * MAC supports to properly work out which linkmodes can be supported.
859 */
860 if (phy->is_c45 &&
861 interface != PHY_INTERFACE_MODE_RXAUI &&
862 interface != PHY_INTERFACE_MODE_XAUI &&
863 interface != PHY_INTERFACE_MODE_USXGMII)
864 config.interface = PHY_INTERFACE_MODE_NA;
865 else
866 config.interface = interface;
867
868 ret = phylink_validate(pl, supported, &config);
869 if (ret) {
870 phylink_warn(pl, "validation of %s with support %*pb and advertisement %*pb failed: %d\n",
871 phy_modes(config.interface),
872 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->supported,
873 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising,
874 ret);
875 return ret;
876 }
877
878 phy->phylink = pl;
879 phy->phy_link_change = phylink_phy_change;
880
881 irq_str = phy_attached_info_irq(phy);
882 phylink_info(pl,
883 "PHY [%s] driver [%s] (irq=%s)\n",
884 dev_name(&phy->mdio.dev), phy->drv->name, irq_str);
885 kfree(irq_str);
886
887 mutex_lock(&phy->lock);
888 mutex_lock(&pl->state_mutex);
889 pl->phydev = phy;
890 pl->phy_state.interface = interface;
891 pl->phy_state.pause = MLO_PAUSE_NONE;
892 pl->phy_state.speed = SPEED_UNKNOWN;
893 pl->phy_state.duplex = DUPLEX_UNKNOWN;
894 linkmode_copy(pl->supported, supported);
895 linkmode_copy(pl->link_config.advertising, config.advertising);
896
897 /* Restrict the phy advertisement according to the MAC support. */
898 linkmode_copy(phy->advertising, config.advertising);
899 mutex_unlock(&pl->state_mutex);
900 mutex_unlock(&phy->lock);
901
902 phylink_dbg(pl,
903 "phy: setting supported %*pb advertising %*pb\n",
904 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported,
905 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising);
906
907 if (phy_interrupt_is_valid(phy))
908 phy_request_interrupt(phy);
909
910 return 0;
911 }
912
913 static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy,
914 phy_interface_t interface)
915 {
916 if (WARN_ON(pl->cfg_link_an_mode == MLO_AN_FIXED ||
917 (pl->cfg_link_an_mode == MLO_AN_INBAND &&
918 phy_interface_mode_is_8023z(interface))))
919 return -EINVAL;
920
921 if (pl->phydev)
922 return -EBUSY;
923
924 return phy_attach_direct(pl->netdev, phy, 0, interface);
925 }
926
927 /**
928 * phylink_connect_phy() - connect a PHY to the phylink instance
929 * @pl: a pointer to a &struct phylink returned from phylink_create()
930 * @phy: a pointer to a &struct phy_device.
931 *
932 * Connect @phy to the phylink instance specified by @pl by calling
933 * phy_attach_direct(). Configure the @phy according to the MAC driver's
934 * capabilities, start the PHYLIB state machine and enable any interrupts
935 * that the PHY supports.
936 *
937 * This updates the phylink's ethtool supported and advertising link mode
938 * masks.
939 *
940 * Returns 0 on success or a negative errno.
941 */
942 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy)
943 {
944 int ret;
945
946 /* Use PHY device/driver interface */
947 if (pl->link_interface == PHY_INTERFACE_MODE_NA) {
948 pl->link_interface = phy->interface;
949 pl->link_config.interface = pl->link_interface;
950 }
951
952 ret = phylink_attach_phy(pl, phy, pl->link_interface);
953 if (ret < 0)
954 return ret;
955
956 ret = phylink_bringup_phy(pl, phy, pl->link_config.interface);
957 if (ret)
958 phy_detach(phy);
959
960 return ret;
961 }
962 EXPORT_SYMBOL_GPL(phylink_connect_phy);
963
964 /**
965 * phylink_of_phy_connect() - connect the PHY specified in the DT mode.
966 * @pl: a pointer to a &struct phylink returned from phylink_create()
967 * @dn: a pointer to a &struct device_node.
968 * @flags: PHY-specific flags to communicate to the PHY device driver
969 *
970 * Connect the phy specified in the device node @dn to the phylink instance
971 * specified by @pl. Actions specified in phylink_connect_phy() will be
972 * performed.
973 *
974 * Returns 0 on success or a negative errno.
975 */
976 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn,
977 u32 flags)
978 {
979 struct device_node *phy_node;
980 struct phy_device *phy_dev;
981 int ret;
982
983 /* Fixed links and 802.3z are handled without needing a PHY */
984 if (pl->cfg_link_an_mode == MLO_AN_FIXED ||
985 (pl->cfg_link_an_mode == MLO_AN_INBAND &&
986 phy_interface_mode_is_8023z(pl->link_interface)))
987 return 0;
988
989 phy_node = of_parse_phandle(dn, "phy-handle", 0);
990 if (!phy_node)
991 phy_node = of_parse_phandle(dn, "phy", 0);
992 if (!phy_node)
993 phy_node = of_parse_phandle(dn, "phy-device", 0);
994
995 if (!phy_node) {
996 if (pl->cfg_link_an_mode == MLO_AN_PHY)
997 return -ENODEV;
998 return 0;
999 }
1000
1001 phy_dev = of_phy_find_device(phy_node);
1002 /* We're done with the phy_node handle */
1003 of_node_put(phy_node);
1004 if (!phy_dev)
1005 return -ENODEV;
1006
1007 ret = phy_attach_direct(pl->netdev, phy_dev, flags,
1008 pl->link_interface);
1009 if (ret)
1010 return ret;
1011
1012 ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface);
1013 if (ret)
1014 phy_detach(phy_dev);
1015
1016 return ret;
1017 }
1018 EXPORT_SYMBOL_GPL(phylink_of_phy_connect);
1019
1020 /**
1021 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink
1022 * instance.
1023 * @pl: a pointer to a &struct phylink returned from phylink_create()
1024 *
1025 * Disconnect any current PHY from the phylink instance described by @pl.
1026 */
1027 void phylink_disconnect_phy(struct phylink *pl)
1028 {
1029 struct phy_device *phy;
1030
1031 ASSERT_RTNL();
1032
1033 phy = pl->phydev;
1034 if (phy) {
1035 mutex_lock(&phy->lock);
1036 mutex_lock(&pl->state_mutex);
1037 pl->phydev = NULL;
1038 mutex_unlock(&pl->state_mutex);
1039 mutex_unlock(&phy->lock);
1040 flush_work(&pl->resolve);
1041
1042 phy_disconnect(phy);
1043 }
1044 }
1045 EXPORT_SYMBOL_GPL(phylink_disconnect_phy);
1046
1047 /**
1048 * phylink_fixed_state_cb() - allow setting a fixed link callback
1049 * @pl: a pointer to a &struct phylink returned from phylink_create()
1050 * @cb: callback to execute to determine the fixed link state.
1051 *
1052 * The MAC driver should call this driver when the state of its link
1053 * can be determined through e.g: an out of band MMIO register.
1054 */
1055 int phylink_fixed_state_cb(struct phylink *pl,
1056 void (*cb)(struct net_device *dev,
1057 struct phylink_link_state *state))
1058 {
1059 /* It does not make sense to let the link be overriden unless we use
1060 * MLO_AN_FIXED
1061 */
1062 if (pl->cfg_link_an_mode != MLO_AN_FIXED)
1063 return -EINVAL;
1064
1065 mutex_lock(&pl->state_mutex);
1066 pl->get_fixed_state = cb;
1067 mutex_unlock(&pl->state_mutex);
1068
1069 return 0;
1070 }
1071 EXPORT_SYMBOL_GPL(phylink_fixed_state_cb);
1072
1073 /**
1074 * phylink_mac_change() - notify phylink of a change in MAC state
1075 * @pl: a pointer to a &struct phylink returned from phylink_create()
1076 * @up: indicates whether the link is currently up.
1077 *
1078 * The MAC driver should call this driver when the state of its link
1079 * changes (eg, link failure, new negotiation results, etc.)
1080 */
1081 void phylink_mac_change(struct phylink *pl, bool up)
1082 {
1083 if (!up)
1084 pl->mac_link_dropped = true;
1085 phylink_run_resolve(pl);
1086 phylink_dbg(pl, "mac link %s\n", up ? "up" : "down");
1087 }
1088 EXPORT_SYMBOL_GPL(phylink_mac_change);
1089
1090 static irqreturn_t phylink_link_handler(int irq, void *data)
1091 {
1092 struct phylink *pl = data;
1093
1094 phylink_run_resolve(pl);
1095
1096 return IRQ_HANDLED;
1097 }
1098
1099 /**
1100 * phylink_start() - start a phylink instance
1101 * @pl: a pointer to a &struct phylink returned from phylink_create()
1102 *
1103 * Start the phylink instance specified by @pl, configuring the MAC for the
1104 * desired link mode(s) and negotiation style. This should be called from the
1105 * network device driver's &struct net_device_ops ndo_open() method.
1106 */
1107 void phylink_start(struct phylink *pl)
1108 {
1109 ASSERT_RTNL();
1110
1111 phylink_info(pl, "configuring for %s/%s link mode\n",
1112 phylink_an_mode_str(pl->cur_link_an_mode),
1113 phy_modes(pl->link_config.interface));
1114
1115 /* Always set the carrier off */
1116 if (pl->netdev)
1117 netif_carrier_off(pl->netdev);
1118
1119 /* Apply the link configuration to the MAC when starting. This allows
1120 * a fixed-link to start with the correct parameters, and also
1121 * ensures that we set the appropriate advertisement for Serdes links.
1122 *
1123 * Restart autonegotiation if using 802.3z to ensure that the link
1124 * parameters are properly negotiated. This is necessary for DSA
1125 * switches using 802.3z negotiation to ensure they see our modes.
1126 */
1127 phylink_mac_initial_config(pl, true);
1128
1129 clear_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
1130 phylink_run_resolve(pl);
1131
1132 if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) {
1133 int irq = gpiod_to_irq(pl->link_gpio);
1134
1135 if (irq > 0) {
1136 if (!request_irq(irq, phylink_link_handler,
1137 IRQF_TRIGGER_RISING |
1138 IRQF_TRIGGER_FALLING,
1139 "netdev link", pl))
1140 pl->link_irq = irq;
1141 else
1142 irq = 0;
1143 }
1144 if (irq <= 0)
1145 mod_timer(&pl->link_poll, jiffies + HZ);
1146 }
1147 if ((pl->cfg_link_an_mode == MLO_AN_FIXED && pl->get_fixed_state) ||
1148 pl->config->pcs_poll)
1149 mod_timer(&pl->link_poll, jiffies + HZ);
1150 if (pl->phydev)
1151 phy_start(pl->phydev);
1152 if (pl->sfp_bus)
1153 sfp_upstream_start(pl->sfp_bus);
1154 }
1155 EXPORT_SYMBOL_GPL(phylink_start);
1156
1157 /**
1158 * phylink_stop() - stop a phylink instance
1159 * @pl: a pointer to a &struct phylink returned from phylink_create()
1160 *
1161 * Stop the phylink instance specified by @pl. This should be called from the
1162 * network device driver's &struct net_device_ops ndo_stop() method. The
1163 * network device's carrier state should not be changed prior to calling this
1164 * function.
1165 */
1166 void phylink_stop(struct phylink *pl)
1167 {
1168 ASSERT_RTNL();
1169
1170 if (pl->sfp_bus)
1171 sfp_upstream_stop(pl->sfp_bus);
1172 if (pl->phydev)
1173 phy_stop(pl->phydev);
1174 del_timer_sync(&pl->link_poll);
1175 if (pl->link_irq) {
1176 free_irq(pl->link_irq, pl);
1177 pl->link_irq = 0;
1178 }
1179
1180 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED);
1181 }
1182 EXPORT_SYMBOL_GPL(phylink_stop);
1183
1184 /**
1185 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY
1186 * @pl: a pointer to a &struct phylink returned from phylink_create()
1187 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters
1188 *
1189 * Read the wake on lan parameters from the PHY attached to the phylink
1190 * instance specified by @pl. If no PHY is currently attached, report no
1191 * support for wake on lan.
1192 */
1193 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
1194 {
1195 ASSERT_RTNL();
1196
1197 wol->supported = 0;
1198 wol->wolopts = 0;
1199
1200 if (pl->phydev)
1201 phy_ethtool_get_wol(pl->phydev, wol);
1202 }
1203 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol);
1204
1205 /**
1206 * phylink_ethtool_set_wol() - set wake on lan parameters
1207 * @pl: a pointer to a &struct phylink returned from phylink_create()
1208 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters
1209 *
1210 * Set the wake on lan parameters for the PHY attached to the phylink
1211 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP
1212 * error.
1213 *
1214 * Returns zero on success or negative errno code.
1215 */
1216 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
1217 {
1218 int ret = -EOPNOTSUPP;
1219
1220 ASSERT_RTNL();
1221
1222 if (pl->phydev)
1223 ret = phy_ethtool_set_wol(pl->phydev, wol);
1224
1225 return ret;
1226 }
1227 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol);
1228
1229 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b)
1230 {
1231 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask);
1232
1233 linkmode_zero(mask);
1234 phylink_set_port_modes(mask);
1235
1236 linkmode_and(dst, dst, mask);
1237 linkmode_or(dst, dst, b);
1238 }
1239
1240 static void phylink_get_ksettings(const struct phylink_link_state *state,
1241 struct ethtool_link_ksettings *kset)
1242 {
1243 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising);
1244 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising);
1245 kset->base.speed = state->speed;
1246 kset->base.duplex = state->duplex;
1247 kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE :
1248 AUTONEG_DISABLE;
1249 }
1250
1251 /**
1252 * phylink_ethtool_ksettings_get() - get the current link settings
1253 * @pl: a pointer to a &struct phylink returned from phylink_create()
1254 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings
1255 *
1256 * Read the current link settings for the phylink instance specified by @pl.
1257 * This will be the link settings read from the MAC, PHY or fixed link
1258 * settings depending on the current negotiation mode.
1259 */
1260 int phylink_ethtool_ksettings_get(struct phylink *pl,
1261 struct ethtool_link_ksettings *kset)
1262 {
1263 struct phylink_link_state link_state;
1264
1265 ASSERT_RTNL();
1266
1267 if (pl->phydev) {
1268 phy_ethtool_ksettings_get(pl->phydev, kset);
1269 } else {
1270 kset->base.port = pl->link_port;
1271 }
1272
1273 linkmode_copy(kset->link_modes.supported, pl->supported);
1274
1275 switch (pl->cur_link_an_mode) {
1276 case MLO_AN_FIXED:
1277 /* We are using fixed settings. Report these as the
1278 * current link settings - and note that these also
1279 * represent the supported speeds/duplex/pause modes.
1280 */
1281 phylink_get_fixed_state(pl, &link_state);
1282 phylink_get_ksettings(&link_state, kset);
1283 break;
1284
1285 case MLO_AN_INBAND:
1286 /* If there is a phy attached, then use the reported
1287 * settings from the phy with no modification.
1288 */
1289 if (pl->phydev)
1290 break;
1291
1292 phylink_mac_pcs_get_state(pl, &link_state);
1293
1294 /* The MAC is reporting the link results from its own PCS
1295 * layer via in-band status. Report these as the current
1296 * link settings.
1297 */
1298 phylink_get_ksettings(&link_state, kset);
1299 break;
1300 }
1301
1302 return 0;
1303 }
1304 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get);
1305
1306 /**
1307 * phylink_ethtool_ksettings_set() - set the link settings
1308 * @pl: a pointer to a &struct phylink returned from phylink_create()
1309 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes
1310 */
1311 int phylink_ethtool_ksettings_set(struct phylink *pl,
1312 const struct ethtool_link_ksettings *kset)
1313 {
1314 __ETHTOOL_DECLARE_LINK_MODE_MASK(support);
1315 struct ethtool_link_ksettings our_kset;
1316 struct phylink_link_state config;
1317 int ret;
1318
1319 ASSERT_RTNL();
1320
1321 if (kset->base.autoneg != AUTONEG_DISABLE &&
1322 kset->base.autoneg != AUTONEG_ENABLE)
1323 return -EINVAL;
1324
1325 linkmode_copy(support, pl->supported);
1326 config = pl->link_config;
1327
1328 /* Mask out unsupported advertisements */
1329 linkmode_and(config.advertising, kset->link_modes.advertising,
1330 support);
1331
1332 /* FIXME: should we reject autoneg if phy/mac does not support it? */
1333 if (kset->base.autoneg == AUTONEG_DISABLE) {
1334 const struct phy_setting *s;
1335
1336 /* Autonegotiation disabled, select a suitable speed and
1337 * duplex.
1338 */
1339 s = phy_lookup_setting(kset->base.speed, kset->base.duplex,
1340 support, false);
1341 if (!s)
1342 return -EINVAL;
1343
1344 /* If we have a fixed link (as specified by firmware), refuse
1345 * to change link parameters.
1346 */
1347 if (pl->cur_link_an_mode == MLO_AN_FIXED &&
1348 (s->speed != pl->link_config.speed ||
1349 s->duplex != pl->link_config.duplex))
1350 return -EINVAL;
1351
1352 config.speed = s->speed;
1353 config.duplex = s->duplex;
1354 config.an_enabled = false;
1355
1356 __clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising);
1357 } else {
1358 /* If we have a fixed link, refuse to enable autonegotiation */
1359 if (pl->cur_link_an_mode == MLO_AN_FIXED)
1360 return -EINVAL;
1361
1362 config.speed = SPEED_UNKNOWN;
1363 config.duplex = DUPLEX_UNKNOWN;
1364 config.an_enabled = true;
1365
1366 __set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising);
1367 }
1368
1369 if (pl->phydev) {
1370 /* If we have a PHY, we process the kset change via phylib.
1371 * phylib will call our link state function if the PHY
1372 * parameters have changed, which will trigger a resolve
1373 * and update the MAC configuration.
1374 */
1375 our_kset = *kset;
1376 linkmode_copy(our_kset.link_modes.advertising,
1377 config.advertising);
1378 our_kset.base.speed = config.speed;
1379 our_kset.base.duplex = config.duplex;
1380
1381 ret = phy_ethtool_ksettings_set(pl->phydev, &our_kset);
1382 if (ret)
1383 return ret;
1384
1385 mutex_lock(&pl->state_mutex);
1386 /* Save the new configuration */
1387 linkmode_copy(pl->link_config.advertising,
1388 our_kset.link_modes.advertising);
1389 pl->link_config.interface = config.interface;
1390 pl->link_config.speed = our_kset.base.speed;
1391 pl->link_config.duplex = our_kset.base.duplex;
1392 pl->link_config.an_enabled = our_kset.base.autoneg !=
1393 AUTONEG_DISABLE;
1394 mutex_unlock(&pl->state_mutex);
1395 } else {
1396 /* For a fixed link, this isn't able to change any parameters,
1397 * which just leaves inband mode.
1398 */
1399 if (phylink_validate(pl, support, &config))
1400 return -EINVAL;
1401
1402 /* If autonegotiation is enabled, we must have an advertisement */
1403 if (config.an_enabled &&
1404 phylink_is_empty_linkmode(config.advertising))
1405 return -EINVAL;
1406
1407 mutex_lock(&pl->state_mutex);
1408 linkmode_copy(pl->link_config.advertising, config.advertising);
1409 pl->link_config.interface = config.interface;
1410 pl->link_config.speed = config.speed;
1411 pl->link_config.duplex = config.duplex;
1412 pl->link_config.an_enabled = kset->base.autoneg !=
1413 AUTONEG_DISABLE;
1414
1415 if (pl->cur_link_an_mode == MLO_AN_INBAND &&
1416 !test_bit(PHYLINK_DISABLE_STOPPED,
1417 &pl->phylink_disable_state)) {
1418 /* If in 802.3z mode, this updates the advertisement.
1419 *
1420 * If we are in SGMII mode without a PHY, there is no
1421 * advertisement; the only thing we have is the pause
1422 * modes which can only come from a PHY.
1423 */
1424 phylink_pcs_config(pl, true, &pl->link_config);
1425 }
1426 mutex_unlock(&pl->state_mutex);
1427 }
1428
1429 return 0;
1430 }
1431 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set);
1432
1433 /**
1434 * phylink_ethtool_nway_reset() - restart negotiation
1435 * @pl: a pointer to a &struct phylink returned from phylink_create()
1436 *
1437 * Restart negotiation for the phylink instance specified by @pl. This will
1438 * cause any attached phy to restart negotiation with the link partner, and
1439 * if the MAC is in a BaseX mode, the MAC will also be requested to restart
1440 * negotiation.
1441 *
1442 * Returns zero on success, or negative error code.
1443 */
1444 int phylink_ethtool_nway_reset(struct phylink *pl)
1445 {
1446 int ret = 0;
1447
1448 ASSERT_RTNL();
1449
1450 if (pl->phydev)
1451 ret = phy_restart_aneg(pl->phydev);
1452 phylink_mac_pcs_an_restart(pl);
1453
1454 return ret;
1455 }
1456 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset);
1457
1458 /**
1459 * phylink_ethtool_get_pauseparam() - get the current pause parameters
1460 * @pl: a pointer to a &struct phylink returned from phylink_create()
1461 * @pause: a pointer to a &struct ethtool_pauseparam
1462 */
1463 void phylink_ethtool_get_pauseparam(struct phylink *pl,
1464 struct ethtool_pauseparam *pause)
1465 {
1466 ASSERT_RTNL();
1467
1468 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN);
1469 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX);
1470 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX);
1471 }
1472 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam);
1473
1474 /**
1475 * phylink_ethtool_set_pauseparam() - set the current pause parameters
1476 * @pl: a pointer to a &struct phylink returned from phylink_create()
1477 * @pause: a pointer to a &struct ethtool_pauseparam
1478 */
1479 int phylink_ethtool_set_pauseparam(struct phylink *pl,
1480 struct ethtool_pauseparam *pause)
1481 {
1482 struct phylink_link_state *config = &pl->link_config;
1483 bool manual_changed;
1484 int pause_state;
1485
1486 ASSERT_RTNL();
1487
1488 if (pl->cur_link_an_mode == MLO_AN_FIXED)
1489 return -EOPNOTSUPP;
1490
1491 if (!phylink_test(pl->supported, Pause) &&
1492 !phylink_test(pl->supported, Asym_Pause))
1493 return -EOPNOTSUPP;
1494
1495 if (!phylink_test(pl->supported, Asym_Pause) &&
1496 !pause->autoneg && pause->rx_pause != pause->tx_pause)
1497 return -EINVAL;
1498
1499 pause_state = 0;
1500 if (pause->autoneg)
1501 pause_state |= MLO_PAUSE_AN;
1502 if (pause->rx_pause)
1503 pause_state |= MLO_PAUSE_RX;
1504 if (pause->tx_pause)
1505 pause_state |= MLO_PAUSE_TX;
1506
1507 mutex_lock(&pl->state_mutex);
1508 /*
1509 * See the comments for linkmode_set_pause(), wrt the deficiencies
1510 * with the current implementation. A solution to this issue would
1511 * be:
1512 * ethtool Local device
1513 * rx tx Pause AsymDir
1514 * 0 0 0 0
1515 * 1 0 1 1
1516 * 0 1 0 1
1517 * 1 1 1 1
1518 * and then use the ethtool rx/tx enablement status to mask the
1519 * rx/tx pause resolution.
1520 */
1521 linkmode_set_pause(config->advertising, pause->tx_pause,
1522 pause->rx_pause);
1523
1524 manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN ||
1525 (!(pause_state & MLO_PAUSE_AN) &&
1526 (config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK);
1527
1528 config->pause = pause_state;
1529
1530 if (!pl->phydev && !test_bit(PHYLINK_DISABLE_STOPPED,
1531 &pl->phylink_disable_state))
1532 phylink_pcs_config(pl, true, &pl->link_config);
1533
1534 mutex_unlock(&pl->state_mutex);
1535
1536 /* If we have a PHY, a change of the pause frame advertisement will
1537 * cause phylib to renegotiate (if AN is enabled) which will in turn
1538 * call our phylink_phy_change() and trigger a resolve. Note that
1539 * we can't hold our state mutex while calling phy_set_asym_pause().
1540 */
1541 if (pl->phydev)
1542 phy_set_asym_pause(pl->phydev, pause->rx_pause,
1543 pause->tx_pause);
1544
1545 /* If the manual pause settings changed, make sure we trigger a
1546 * resolve to update their state; we can not guarantee that the
1547 * link will cycle.
1548 */
1549 if (manual_changed) {
1550 pl->mac_link_dropped = true;
1551 phylink_run_resolve(pl);
1552 }
1553
1554 return 0;
1555 }
1556 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam);
1557
1558 /**
1559 * phylink_ethtool_get_eee_err() - read the energy efficient ethernet error
1560 * counter
1561 * @pl: a pointer to a &struct phylink returned from phylink_create().
1562 *
1563 * Read the Energy Efficient Ethernet error counter from the PHY associated
1564 * with the phylink instance specified by @pl.
1565 *
1566 * Returns positive error counter value, or negative error code.
1567 */
1568 int phylink_get_eee_err(struct phylink *pl)
1569 {
1570 int ret = 0;
1571
1572 ASSERT_RTNL();
1573
1574 if (pl->phydev)
1575 ret = phy_get_eee_err(pl->phydev);
1576
1577 return ret;
1578 }
1579 EXPORT_SYMBOL_GPL(phylink_get_eee_err);
1580
1581 /**
1582 * phylink_init_eee() - init and check the EEE features
1583 * @pl: a pointer to a &struct phylink returned from phylink_create()
1584 * @clk_stop_enable: allow PHY to stop receive clock
1585 *
1586 * Must be called either with RTNL held or within mac_link_up()
1587 */
1588 int phylink_init_eee(struct phylink *pl, bool clk_stop_enable)
1589 {
1590 int ret = -EOPNOTSUPP;
1591
1592 if (pl->phydev)
1593 ret = phy_init_eee(pl->phydev, clk_stop_enable);
1594
1595 return ret;
1596 }
1597 EXPORT_SYMBOL_GPL(phylink_init_eee);
1598
1599 /**
1600 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters
1601 * @pl: a pointer to a &struct phylink returned from phylink_create()
1602 * @eee: a pointer to a &struct ethtool_eee for the read parameters
1603 */
1604 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee)
1605 {
1606 int ret = -EOPNOTSUPP;
1607
1608 ASSERT_RTNL();
1609
1610 if (pl->phydev)
1611 ret = phy_ethtool_get_eee(pl->phydev, eee);
1612
1613 return ret;
1614 }
1615 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee);
1616
1617 /**
1618 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters
1619 * @pl: a pointer to a &struct phylink returned from phylink_create()
1620 * @eee: a pointer to a &struct ethtool_eee for the desired parameters
1621 */
1622 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee)
1623 {
1624 int ret = -EOPNOTSUPP;
1625
1626 ASSERT_RTNL();
1627
1628 if (pl->phydev)
1629 ret = phy_ethtool_set_eee(pl->phydev, eee);
1630
1631 return ret;
1632 }
1633 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee);
1634
1635 /* This emulates MII registers for a fixed-mode phy operating as per the
1636 * passed in state. "aneg" defines if we report negotiation is possible.
1637 *
1638 * FIXME: should deal with negotiation state too.
1639 */
1640 static int phylink_mii_emul_read(unsigned int reg,
1641 struct phylink_link_state *state)
1642 {
1643 struct fixed_phy_status fs;
1644 unsigned long *lpa = state->lp_advertising;
1645 int val;
1646
1647 fs.link = state->link;
1648 fs.speed = state->speed;
1649 fs.duplex = state->duplex;
1650 fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa);
1651 fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa);
1652
1653 val = swphy_read_reg(reg, &fs);
1654 if (reg == MII_BMSR) {
1655 if (!state->an_complete)
1656 val &= ~BMSR_ANEGCOMPLETE;
1657 }
1658 return val;
1659 }
1660
1661 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id,
1662 unsigned int reg)
1663 {
1664 struct phy_device *phydev = pl->phydev;
1665 int prtad, devad;
1666
1667 if (mdio_phy_id_is_c45(phy_id)) {
1668 prtad = mdio_phy_id_prtad(phy_id);
1669 devad = mdio_phy_id_devad(phy_id);
1670 devad = MII_ADDR_C45 | devad << 16 | reg;
1671 } else if (phydev->is_c45) {
1672 switch (reg) {
1673 case MII_BMCR:
1674 case MII_BMSR:
1675 case MII_PHYSID1:
1676 case MII_PHYSID2:
1677 devad = __ffs(phydev->c45_ids.devices_in_package);
1678 break;
1679 case MII_ADVERTISE:
1680 case MII_LPA:
1681 if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN))
1682 return -EINVAL;
1683 devad = MDIO_MMD_AN;
1684 if (reg == MII_ADVERTISE)
1685 reg = MDIO_AN_ADVERTISE;
1686 else
1687 reg = MDIO_AN_LPA;
1688 break;
1689 default:
1690 return -EINVAL;
1691 }
1692 prtad = phy_id;
1693 devad = MII_ADDR_C45 | devad << 16 | reg;
1694 } else {
1695 prtad = phy_id;
1696 devad = reg;
1697 }
1698 return mdiobus_read(pl->phydev->mdio.bus, prtad, devad);
1699 }
1700
1701 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id,
1702 unsigned int reg, unsigned int val)
1703 {
1704 struct phy_device *phydev = pl->phydev;
1705 int prtad, devad;
1706
1707 if (mdio_phy_id_is_c45(phy_id)) {
1708 prtad = mdio_phy_id_prtad(phy_id);
1709 devad = mdio_phy_id_devad(phy_id);
1710 devad = MII_ADDR_C45 | devad << 16 | reg;
1711 } else if (phydev->is_c45) {
1712 switch (reg) {
1713 case MII_BMCR:
1714 case MII_BMSR:
1715 case MII_PHYSID1:
1716 case MII_PHYSID2:
1717 devad = __ffs(phydev->c45_ids.devices_in_package);
1718 break;
1719 case MII_ADVERTISE:
1720 case MII_LPA:
1721 if (!(phydev->c45_ids.devices_in_package & MDIO_DEVS_AN))
1722 return -EINVAL;
1723 devad = MDIO_MMD_AN;
1724 if (reg == MII_ADVERTISE)
1725 reg = MDIO_AN_ADVERTISE;
1726 else
1727 reg = MDIO_AN_LPA;
1728 break;
1729 default:
1730 return -EINVAL;
1731 }
1732 prtad = phy_id;
1733 devad = MII_ADDR_C45 | devad << 16 | reg;
1734 } else {
1735 prtad = phy_id;
1736 devad = reg;
1737 }
1738
1739 return mdiobus_write(phydev->mdio.bus, prtad, devad, val);
1740 }
1741
1742 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id,
1743 unsigned int reg)
1744 {
1745 struct phylink_link_state state;
1746 int val = 0xffff;
1747
1748 switch (pl->cur_link_an_mode) {
1749 case MLO_AN_FIXED:
1750 if (phy_id == 0) {
1751 phylink_get_fixed_state(pl, &state);
1752 val = phylink_mii_emul_read(reg, &state);
1753 }
1754 break;
1755
1756 case MLO_AN_PHY:
1757 return -EOPNOTSUPP;
1758
1759 case MLO_AN_INBAND:
1760 if (phy_id == 0) {
1761 phylink_mac_pcs_get_state(pl, &state);
1762 val = phylink_mii_emul_read(reg, &state);
1763 }
1764 break;
1765 }
1766
1767 return val & 0xffff;
1768 }
1769
1770 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id,
1771 unsigned int reg, unsigned int val)
1772 {
1773 switch (pl->cur_link_an_mode) {
1774 case MLO_AN_FIXED:
1775 break;
1776
1777 case MLO_AN_PHY:
1778 return -EOPNOTSUPP;
1779
1780 case MLO_AN_INBAND:
1781 break;
1782 }
1783
1784 return 0;
1785 }
1786
1787 /**
1788 * phylink_mii_ioctl() - generic mii ioctl interface
1789 * @pl: a pointer to a &struct phylink returned from phylink_create()
1790 * @ifr: a pointer to a &struct ifreq for socket ioctls
1791 * @cmd: ioctl cmd to execute
1792 *
1793 * Perform the specified MII ioctl on the PHY attached to the phylink instance
1794 * specified by @pl. If no PHY is attached, emulate the presence of the PHY.
1795 *
1796 * Returns: zero on success or negative error code.
1797 *
1798 * %SIOCGMIIPHY:
1799 * read register from the current PHY.
1800 * %SIOCGMIIREG:
1801 * read register from the specified PHY.
1802 * %SIOCSMIIREG:
1803 * set a register on the specified PHY.
1804 */
1805 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd)
1806 {
1807 struct mii_ioctl_data *mii = if_mii(ifr);
1808 int ret;
1809
1810 ASSERT_RTNL();
1811
1812 if (pl->phydev) {
1813 /* PHYs only exist for MLO_AN_PHY and SGMII */
1814 switch (cmd) {
1815 case SIOCGMIIPHY:
1816 mii->phy_id = pl->phydev->mdio.addr;
1817 /* fall through */
1818
1819 case SIOCGMIIREG:
1820 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num);
1821 if (ret >= 0) {
1822 mii->val_out = ret;
1823 ret = 0;
1824 }
1825 break;
1826
1827 case SIOCSMIIREG:
1828 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num,
1829 mii->val_in);
1830 break;
1831
1832 default:
1833 ret = phy_mii_ioctl(pl->phydev, ifr, cmd);
1834 break;
1835 }
1836 } else {
1837 switch (cmd) {
1838 case SIOCGMIIPHY:
1839 mii->phy_id = 0;
1840 /* fall through */
1841
1842 case SIOCGMIIREG:
1843 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num);
1844 if (ret >= 0) {
1845 mii->val_out = ret;
1846 ret = 0;
1847 }
1848 break;
1849
1850 case SIOCSMIIREG:
1851 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num,
1852 mii->val_in);
1853 break;
1854
1855 default:
1856 ret = -EOPNOTSUPP;
1857 break;
1858 }
1859 }
1860
1861 return ret;
1862 }
1863 EXPORT_SYMBOL_GPL(phylink_mii_ioctl);
1864
1865 static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus)
1866 {
1867 struct phylink *pl = upstream;
1868
1869 pl->netdev->sfp_bus = bus;
1870 }
1871
1872 static void phylink_sfp_detach(void *upstream, struct sfp_bus *bus)
1873 {
1874 struct phylink *pl = upstream;
1875
1876 pl->netdev->sfp_bus = NULL;
1877 }
1878
1879 static int phylink_sfp_config(struct phylink *pl, u8 mode,
1880 const unsigned long *supported,
1881 const unsigned long *advertising)
1882 {
1883 __ETHTOOL_DECLARE_LINK_MODE_MASK(support1);
1884 __ETHTOOL_DECLARE_LINK_MODE_MASK(support);
1885 struct phylink_link_state config;
1886 phy_interface_t iface;
1887 bool changed;
1888 int ret;
1889
1890 linkmode_copy(support, supported);
1891
1892 memset(&config, 0, sizeof(config));
1893 linkmode_copy(config.advertising, advertising);
1894 config.interface = PHY_INTERFACE_MODE_NA;
1895 config.speed = SPEED_UNKNOWN;
1896 config.duplex = DUPLEX_UNKNOWN;
1897 config.pause = MLO_PAUSE_AN;
1898 config.an_enabled = pl->link_config.an_enabled;
1899
1900 /* Ignore errors if we're expecting a PHY to attach later */
1901 ret = phylink_validate(pl, support, &config);
1902 if (ret) {
1903 phylink_err(pl, "validation with support %*pb failed: %d\n",
1904 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
1905 return ret;
1906 }
1907
1908 iface = sfp_select_interface(pl->sfp_bus, config.advertising);
1909 if (iface == PHY_INTERFACE_MODE_NA) {
1910 phylink_err(pl,
1911 "selection of interface failed, advertisement %*pb\n",
1912 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising);
1913 return -EINVAL;
1914 }
1915
1916 config.interface = iface;
1917 linkmode_copy(support1, support);
1918 ret = phylink_validate(pl, support1, &config);
1919 if (ret) {
1920 phylink_err(pl, "validation of %s/%s with support %*pb failed: %d\n",
1921 phylink_an_mode_str(mode),
1922 phy_modes(config.interface),
1923 __ETHTOOL_LINK_MODE_MASK_NBITS, support, ret);
1924 return ret;
1925 }
1926
1927 phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n",
1928 phylink_an_mode_str(mode), phy_modes(config.interface),
1929 __ETHTOOL_LINK_MODE_MASK_NBITS, support);
1930
1931 if (phy_interface_mode_is_8023z(iface) && pl->phydev)
1932 return -EINVAL;
1933
1934 changed = !linkmode_equal(pl->supported, support);
1935 if (changed) {
1936 linkmode_copy(pl->supported, support);
1937 linkmode_copy(pl->link_config.advertising, config.advertising);
1938 }
1939
1940 if (pl->cur_link_an_mode != mode ||
1941 pl->link_config.interface != config.interface) {
1942 pl->link_config.interface = config.interface;
1943 pl->cur_link_an_mode = mode;
1944
1945 changed = true;
1946
1947 phylink_info(pl, "switched to %s/%s link mode\n",
1948 phylink_an_mode_str(mode),
1949 phy_modes(config.interface));
1950 }
1951
1952 pl->link_port = pl->sfp_port;
1953
1954 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED,
1955 &pl->phylink_disable_state))
1956 phylink_mac_initial_config(pl, false);
1957
1958 return ret;
1959 }
1960
1961 static int phylink_sfp_module_insert(void *upstream,
1962 const struct sfp_eeprom_id *id)
1963 {
1964 struct phylink *pl = upstream;
1965 unsigned long *support = pl->sfp_support;
1966
1967 ASSERT_RTNL();
1968
1969 linkmode_zero(support);
1970 sfp_parse_support(pl->sfp_bus, id, support);
1971 pl->sfp_port = sfp_parse_port(pl->sfp_bus, id, support);
1972
1973 /* If this module may have a PHY connecting later, defer until later */
1974 pl->sfp_may_have_phy = sfp_may_have_phy(pl->sfp_bus, id);
1975 if (pl->sfp_may_have_phy)
1976 return 0;
1977
1978 return phylink_sfp_config(pl, MLO_AN_INBAND, support, support);
1979 }
1980
1981 static int phylink_sfp_module_start(void *upstream)
1982 {
1983 struct phylink *pl = upstream;
1984
1985 /* If this SFP module has a PHY, start the PHY now. */
1986 if (pl->phydev) {
1987 phy_start(pl->phydev);
1988 return 0;
1989 }
1990
1991 /* If the module may have a PHY but we didn't detect one we
1992 * need to configure the MAC here.
1993 */
1994 if (!pl->sfp_may_have_phy)
1995 return 0;
1996
1997 return phylink_sfp_config(pl, MLO_AN_INBAND,
1998 pl->sfp_support, pl->sfp_support);
1999 }
2000
2001 static void phylink_sfp_module_stop(void *upstream)
2002 {
2003 struct phylink *pl = upstream;
2004
2005 /* If this SFP module has a PHY, stop it. */
2006 if (pl->phydev)
2007 phy_stop(pl->phydev);
2008 }
2009
2010 static void phylink_sfp_link_down(void *upstream)
2011 {
2012 struct phylink *pl = upstream;
2013
2014 ASSERT_RTNL();
2015
2016 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK);
2017 }
2018
2019 static void phylink_sfp_link_up(void *upstream)
2020 {
2021 struct phylink *pl = upstream;
2022
2023 ASSERT_RTNL();
2024
2025 clear_bit(PHYLINK_DISABLE_LINK, &pl->phylink_disable_state);
2026 phylink_run_resolve(pl);
2027 }
2028
2029 /* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII
2030 * or 802.3z control word, so inband will not work.
2031 */
2032 static bool phylink_phy_no_inband(struct phy_device *phy)
2033 {
2034 return phy->is_c45 &&
2035 (phy->c45_ids.device_ids[1] & 0xfffffff0) == 0xae025150;
2036 }
2037
2038 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy)
2039 {
2040 struct phylink *pl = upstream;
2041 phy_interface_t interface;
2042 u8 mode;
2043 int ret;
2044
2045 /*
2046 * This is the new way of dealing with flow control for PHYs,
2047 * as described by Timur Tabi in commit 529ed1275263 ("net: phy:
2048 * phy drivers should not set SUPPORTED_[Asym_]Pause") except
2049 * using our validate call to the MAC, we rely upon the MAC
2050 * clearing the bits from both supported and advertising fields.
2051 */
2052 phy_support_asym_pause(phy);
2053
2054 if (phylink_phy_no_inband(phy))
2055 mode = MLO_AN_PHY;
2056 else
2057 mode = MLO_AN_INBAND;
2058
2059 /* Do the initial configuration */
2060 ret = phylink_sfp_config(pl, mode, phy->supported, phy->advertising);
2061 if (ret < 0)
2062 return ret;
2063
2064 interface = pl->link_config.interface;
2065 ret = phylink_attach_phy(pl, phy, interface);
2066 if (ret < 0)
2067 return ret;
2068
2069 ret = phylink_bringup_phy(pl, phy, interface);
2070 if (ret)
2071 phy_detach(phy);
2072
2073 return ret;
2074 }
2075
2076 static void phylink_sfp_disconnect_phy(void *upstream)
2077 {
2078 phylink_disconnect_phy(upstream);
2079 }
2080
2081 static const struct sfp_upstream_ops sfp_phylink_ops = {
2082 .attach = phylink_sfp_attach,
2083 .detach = phylink_sfp_detach,
2084 .module_insert = phylink_sfp_module_insert,
2085 .module_start = phylink_sfp_module_start,
2086 .module_stop = phylink_sfp_module_stop,
2087 .link_up = phylink_sfp_link_up,
2088 .link_down = phylink_sfp_link_down,
2089 .connect_phy = phylink_sfp_connect_phy,
2090 .disconnect_phy = phylink_sfp_disconnect_phy,
2091 };
2092
2093 /* Helpers for MAC drivers */
2094
2095 /**
2096 * phylink_helper_basex_speed() - 1000BaseX/2500BaseX helper
2097 * @state: a pointer to a &struct phylink_link_state
2098 *
2099 * Inspect the interface mode, advertising mask or forced speed and
2100 * decide whether to run at 2.5Gbit or 1Gbit appropriately, switching
2101 * the interface mode to suit. @state->interface is appropriately
2102 * updated, and the advertising mask has the "other" baseX_Full flag
2103 * cleared.
2104 */
2105 void phylink_helper_basex_speed(struct phylink_link_state *state)
2106 {
2107 if (phy_interface_mode_is_8023z(state->interface)) {
2108 bool want_2500 = state->an_enabled ?
2109 phylink_test(state->advertising, 2500baseX_Full) :
2110 state->speed == SPEED_2500;
2111
2112 if (want_2500) {
2113 phylink_clear(state->advertising, 1000baseX_Full);
2114 state->interface = PHY_INTERFACE_MODE_2500BASEX;
2115 } else {
2116 phylink_clear(state->advertising, 2500baseX_Full);
2117 state->interface = PHY_INTERFACE_MODE_1000BASEX;
2118 }
2119 }
2120 }
2121 EXPORT_SYMBOL_GPL(phylink_helper_basex_speed);
2122
2123 static void phylink_decode_c37_word(struct phylink_link_state *state,
2124 uint16_t config_reg, int speed)
2125 {
2126 bool tx_pause, rx_pause;
2127 int fd_bit;
2128
2129 if (speed == SPEED_2500)
2130 fd_bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT;
2131 else
2132 fd_bit = ETHTOOL_LINK_MODE_1000baseX_Full_BIT;
2133
2134 mii_lpa_mod_linkmode_x(state->lp_advertising, config_reg, fd_bit);
2135
2136 if (linkmode_test_bit(fd_bit, state->advertising) &&
2137 linkmode_test_bit(fd_bit, state->lp_advertising)) {
2138 state->speed = speed;
2139 state->duplex = DUPLEX_FULL;
2140 } else {
2141 /* negotiation failure */
2142 state->link = false;
2143 }
2144
2145 linkmode_resolve_pause(state->advertising, state->lp_advertising,
2146 &tx_pause, &rx_pause);
2147
2148 if (tx_pause)
2149 state->pause |= MLO_PAUSE_TX;
2150 if (rx_pause)
2151 state->pause |= MLO_PAUSE_RX;
2152 }
2153
2154 static void phylink_decode_sgmii_word(struct phylink_link_state *state,
2155 uint16_t config_reg)
2156 {
2157 if (!(config_reg & LPA_SGMII_LINK)) {
2158 state->link = false;
2159 return;
2160 }
2161
2162 switch (config_reg & LPA_SGMII_SPD_MASK) {
2163 case LPA_SGMII_10:
2164 state->speed = SPEED_10;
2165 break;
2166 case LPA_SGMII_100:
2167 state->speed = SPEED_100;
2168 break;
2169 case LPA_SGMII_1000:
2170 state->speed = SPEED_1000;
2171 break;
2172 default:
2173 state->link = false;
2174 return;
2175 }
2176 if (config_reg & LPA_SGMII_FULL_DUPLEX)
2177 state->duplex = DUPLEX_FULL;
2178 else
2179 state->duplex = DUPLEX_HALF;
2180 }
2181
2182 /**
2183 * phylink_mii_c22_pcs_get_state() - read the MAC PCS state
2184 * @pcs: a pointer to a &struct mdio_device.
2185 * @state: a pointer to a &struct phylink_link_state.
2186 *
2187 * Helper for MAC PCS supporting the 802.3 clause 22 register set for
2188 * clause 37 negotiation and/or SGMII control.
2189 *
2190 * Read the MAC PCS state from the MII device configured in @config and
2191 * parse the Clause 37 or Cisco SGMII link partner negotiation word into
2192 * the phylink @state structure. This is suitable to be directly plugged
2193 * into the mac_pcs_get_state() member of the struct phylink_mac_ops
2194 * structure.
2195 */
2196 void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs,
2197 struct phylink_link_state *state)
2198 {
2199 struct mii_bus *bus = pcs->bus;
2200 int addr = pcs->addr;
2201 int bmsr, lpa;
2202
2203 bmsr = mdiobus_read(bus, addr, MII_BMSR);
2204 lpa = mdiobus_read(bus, addr, MII_LPA);
2205 if (bmsr < 0 || lpa < 0) {
2206 state->link = false;
2207 return;
2208 }
2209
2210 state->link = !!(bmsr & BMSR_LSTATUS);
2211 state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE);
2212 if (!state->link)
2213 return;
2214
2215 switch (state->interface) {
2216 case PHY_INTERFACE_MODE_1000BASEX:
2217 phylink_decode_c37_word(state, lpa, SPEED_1000);
2218 break;
2219
2220 case PHY_INTERFACE_MODE_2500BASEX:
2221 phylink_decode_c37_word(state, lpa, SPEED_2500);
2222 break;
2223
2224 case PHY_INTERFACE_MODE_SGMII:
2225 phylink_decode_sgmii_word(state, lpa);
2226 break;
2227
2228 default:
2229 state->link = false;
2230 break;
2231 }
2232 }
2233 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state);
2234
2235 /**
2236 * phylink_mii_c22_pcs_set_advertisement() - configure the clause 37 PCS
2237 * advertisement
2238 * @pcs: a pointer to a &struct mdio_device.
2239 * @interface: the PHY interface mode being configured
2240 * @advertising: the ethtool advertisement mask
2241 *
2242 * Helper for MAC PCS supporting the 802.3 clause 22 register set for
2243 * clause 37 negotiation and/or SGMII control.
2244 *
2245 * Configure the clause 37 PCS advertisement as specified by @state. This
2246 * does not trigger a renegotiation; phylink will do that via the
2247 * mac_an_restart() method of the struct phylink_mac_ops structure.
2248 *
2249 * Returns negative error code on failure to configure the advertisement,
2250 * zero if no change has been made, or one if the advertisement has changed.
2251 */
2252 int phylink_mii_c22_pcs_set_advertisement(struct mdio_device *pcs,
2253 phy_interface_t interface,
2254 const unsigned long *advertising)
2255 {
2256 struct mii_bus *bus = pcs->bus;
2257 int addr = pcs->addr;
2258 int val, ret;
2259 u16 adv;
2260
2261 switch (interface) {
2262 case PHY_INTERFACE_MODE_1000BASEX:
2263 case PHY_INTERFACE_MODE_2500BASEX:
2264 adv = ADVERTISE_1000XFULL;
2265 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2266 advertising))
2267 adv |= ADVERTISE_1000XPAUSE;
2268 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2269 advertising))
2270 adv |= ADVERTISE_1000XPSE_ASYM;
2271
2272 val = mdiobus_read(bus, addr, MII_ADVERTISE);
2273 if (val < 0)
2274 return val;
2275
2276 if (val == adv)
2277 return 0;
2278
2279 ret = mdiobus_write(bus, addr, MII_ADVERTISE, adv);
2280 if (ret < 0)
2281 return ret;
2282
2283 return 1;
2284
2285 case PHY_INTERFACE_MODE_SGMII:
2286 val = mdiobus_read(bus, addr, MII_ADVERTISE);
2287 if (val < 0)
2288 return val;
2289
2290 if (val == 0x0001)
2291 return 0;
2292
2293 ret = mdiobus_write(bus, addr, MII_ADVERTISE, 0x0001);
2294 if (ret < 0)
2295 return ret;
2296
2297 return 1;
2298
2299 default:
2300 /* Nothing to do for other modes */
2301 return 0;
2302 }
2303 }
2304 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_set_advertisement);
2305
2306 /**
2307 * phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation
2308 * @pcs: a pointer to a &struct mdio_device.
2309 *
2310 * Helper for MAC PCS supporting the 802.3 clause 22 register set for
2311 * clause 37 negotiation.
2312 *
2313 * Restart the clause 37 negotiation with the link partner. This is
2314 * suitable to be directly plugged into the mac_pcs_get_state() member
2315 * of the struct phylink_mac_ops structure.
2316 */
2317 void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs)
2318 {
2319 struct mii_bus *bus = pcs->bus;
2320 int val, addr = pcs->addr;
2321
2322 val = mdiobus_read(bus, addr, MII_BMCR);
2323 if (val >= 0) {
2324 val |= BMCR_ANRESTART;
2325
2326 mdiobus_write(bus, addr, MII_BMCR, val);
2327 }
2328 }
2329 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart);
2330
2331 #define C45_ADDR(d,a) (MII_ADDR_C45 | (d) << 16 | (a))
2332 void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs,
2333 struct phylink_link_state *state)
2334 {
2335 struct mii_bus *bus = pcs->bus;
2336 int addr = pcs->addr;
2337 int stat;
2338
2339 stat = mdiobus_read(bus, addr, C45_ADDR(MDIO_MMD_PCS, MDIO_STAT1));
2340 if (stat < 0) {
2341 state->link = false;
2342 return;
2343 }
2344
2345 state->link = !!(stat & MDIO_STAT1_LSTATUS);
2346 if (!state->link)
2347 return;
2348
2349 switch (state->interface) {
2350 case PHY_INTERFACE_MODE_10GBASER:
2351 state->speed = SPEED_10000;
2352 state->duplex = DUPLEX_FULL;
2353 break;
2354
2355 default:
2356 break;
2357 }
2358 }
2359 EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state);
2360
2361 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support