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