1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * phylink models the MAC to optional PHY connection, supporting
4 * technologies such as SFP cages where the PHY is hot-pluggable.
5 *
6 * Copyright (C) 2015 Russell King
7 */
8 #include <linux/acpi.h>
9 #include <linux/ethtool.h>
10 #include <linux/export.h>
11 #include <linux/gpio/consumer.h>
12 #include <linux/netdevice.h>
13 #include <linux/of.h>
14 #include <linux/of_mdio.h>
15 #include <linux/phy.h>
16 #include <linux/phy_fixed.h>
17 #include <linux/phylink.h>
18 #include <linux/rtnetlink.h>
19 #include <linux/spinlock.h>
20 #include <linux/timer.h>
21 #include <linux/workqueue.h>
22
23 #include "sfp.h"
24 #include "swphy.h"
25
26 #define SUPPORTED_INTERFACES \
27 (SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE | \
28 SUPPORTED_BNC | SUPPORTED_AUI | SUPPORTED_Backplane)
29 #define ADVERTISED_INTERFACES \
30 (ADVERTISED_TP | ADVERTISED_MII | ADVERTISED_FIBRE | \
31 ADVERTISED_BNC | ADVERTISED_AUI | ADVERTISED_Backplane)
32
33 enum {
34 PHYLINK_DISABLE_STOPPED,
35 PHYLINK_DISABLE_LINK,
36 PHYLINK_DISABLE_MAC_WOL,
37 };
38
39 /**
40 * struct phylink - internal data type for phylink
41 */
42 struct phylink {
43 /* private: */
44 struct net_device *netdev;
45 const struct phylink_mac_ops *mac_ops;
46 const struct phylink_pcs_ops *pcs_ops;
47 struct phylink_config *config;
48 struct phylink_pcs *pcs;
49 struct device *dev;
50 unsigned int old_link_state:1;
51
52 unsigned long phylink_disable_state; /* bitmask of disables */
53 struct phy_device *phydev;
54 phy_interface_t link_interface; /* PHY_INTERFACE_xxx */
55 u8 cfg_link_an_mode; /* MLO_AN_xxx */
56 u8 cur_link_an_mode;
57 u8 link_port; /* The current non-phy ethtool port */
58 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
59
60 /* The link configuration settings */
61 struct phylink_link_state link_config;
62
63 /* The current settings */
64 phy_interface_t cur_interface;
65
66 struct gpio_desc *link_gpio;
67 unsigned int link_irq;
68 struct timer_list link_poll;
69 void (*get_fixed_state)(struct net_device *dev,
70 struct phylink_link_state *s);
71
72 struct mutex state_mutex;
73 struct phylink_link_state phy_state;
74 struct work_struct resolve;
75
76 bool mac_link_dropped;
77 bool using_mac_select_pcs;
78
79 struct sfp_bus *sfp_bus;
80 bool sfp_may_have_phy;
81 __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support);
82 u8 sfp_port;
83 };
84
85 #define phylink_printk(level, pl, fmt, ...) \
86 do { \
87 if ((pl)->config->type == PHYLINK_NETDEV) \
88 netdev_printk(level, (pl)->netdev, fmt, ##__VA_ARGS__); \
89 else if ((pl)->config->type == PHYLINK_DEV) \
90 dev_printk(level, (pl)->dev, fmt, ##__VA_ARGS__); \
91 } while (0)
92
93 #define phylink_err(pl, fmt, ...) \
94 phylink_printk(KERN_ERR, pl, fmt, ##__VA_ARGS__)
95 #define phylink_warn(pl, fmt, ...) \
96 phylink_printk(KERN_WARNING, pl, fmt, ##__VA_ARGS__)
97 #define phylink_info(pl, fmt, ...) \
98 phylink_printk(KERN_INFO, pl, fmt, ##__VA_ARGS__)
99 #if defined(CONFIG_DYNAMIC_DEBUG)
100 #define phylink_dbg(pl, fmt, ...) \
101 do { \
102 if ((pl)->config->type == PHYLINK_NETDEV) \
103 netdev_dbg((pl)->netdev, fmt, ##__VA_ARGS__); \
104 else if ((pl)->config->type == PHYLINK_DEV) \
105 dev_dbg((pl)->dev, fmt, ##__VA_ARGS__); \
106 } while (0)
107 #elif defined(DEBUG)
108 #define phylink_dbg(pl, fmt, ...) \
109 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__)
110 #else
111 #define phylink_dbg(pl, fmt, ...) \
112 ({ \
113 if (0) \
114 phylink_printk(KERN_DEBUG, pl, fmt, ##__VA_ARGS__); \
115 })
116 #endif
117
118 /**
119 * phylink_set_port_modes() - set the port type modes in the ethtool mask
120 * @mask: ethtool link mode mask
121 *
122 * Sets all the port type modes in the ethtool mask. MAC drivers should
123 * use this in their 'validate' callback.
124 */
phylink_set_port_modes(unsigned long * mask)125 void phylink_set_port_modes(unsigned long *mask)
126 {
127 phylink_set(mask, TP);
128 phylink_set(mask, AUI);
129 phylink_set(mask, MII);
130 phylink_set(mask, FIBRE);
131 phylink_set(mask, BNC);
132 phylink_set(mask, Backplane);
133 }
134 EXPORT_SYMBOL_GPL(phylink_set_port_modes);
135
phylink_is_empty_linkmode(const unsigned long * linkmode)136 static int phylink_is_empty_linkmode(const unsigned long *linkmode)
137 {
138 __ETHTOOL_DECLARE_LINK_MODE_MASK(tmp) = { 0, };
139
140 phylink_set_port_modes(tmp);
141 phylink_set(tmp, Autoneg);
142 phylink_set(tmp, Pause);
143 phylink_set(tmp, Asym_Pause);
144
145 return linkmode_subset(linkmode, tmp);
146 }
147
phylink_an_mode_str(unsigned int mode)148 static const char *phylink_an_mode_str(unsigned int mode)
149 {
150 static const char *modestr[] = {
151 [MLO_AN_PHY] = "phy",
152 [MLO_AN_FIXED] = "fixed",
153 [MLO_AN_INBAND] = "inband",
154 };
155
156 return mode < ARRAY_SIZE(modestr) ? modestr[mode] : "unknown";
157 }
158
phylink_caps_to_linkmodes(unsigned long * linkmodes,unsigned long caps)159 static void phylink_caps_to_linkmodes(unsigned long *linkmodes,
160 unsigned long caps)
161 {
162 if (caps & MAC_SYM_PAUSE)
163 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT, linkmodes);
164
165 if (caps & MAC_ASYM_PAUSE)
166 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, linkmodes);
167
168 if (caps & MAC_10HD)
169 __set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, linkmodes);
170
171 if (caps & MAC_10FD) {
172 __set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, linkmodes);
173 __set_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT, linkmodes);
174 }
175
176 if (caps & MAC_100HD) {
177 __set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, linkmodes);
178 __set_bit(ETHTOOL_LINK_MODE_100baseFX_Half_BIT, linkmodes);
179 }
180
181 if (caps & MAC_100FD) {
182 __set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, linkmodes);
183 __set_bit(ETHTOOL_LINK_MODE_100baseT1_Full_BIT, linkmodes);
184 __set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT, linkmodes);
185 }
186
187 if (caps & MAC_1000HD)
188 __set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, linkmodes);
189
190 if (caps & MAC_1000FD) {
191 __set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, linkmodes);
192 __set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, linkmodes);
193 __set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, linkmodes);
194 __set_bit(ETHTOOL_LINK_MODE_1000baseT1_Full_BIT, linkmodes);
195 }
196
197 if (caps & MAC_2500FD) {
198 __set_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, linkmodes);
199 __set_bit(ETHTOOL_LINK_MODE_2500baseX_Full_BIT, linkmodes);
200 }
201
202 if (caps & MAC_5000FD)
203 __set_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT, linkmodes);
204
205 if (caps & MAC_10000FD) {
206 __set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, linkmodes);
207 __set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, linkmodes);
208 __set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, linkmodes);
209 __set_bit(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT, linkmodes);
210 __set_bit(ETHTOOL_LINK_MODE_10000baseCR_Full_BIT, linkmodes);
211 __set_bit(ETHTOOL_LINK_MODE_10000baseSR_Full_BIT, linkmodes);
212 __set_bit(ETHTOOL_LINK_MODE_10000baseLR_Full_BIT, linkmodes);
213 __set_bit(ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT, linkmodes);
214 __set_bit(ETHTOOL_LINK_MODE_10000baseER_Full_BIT, linkmodes);
215 }
216
217 if (caps & MAC_25000FD) {
218 __set_bit(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT, linkmodes);
219 __set_bit(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT, linkmodes);
220 __set_bit(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT, linkmodes);
221 }
222
223 if (caps & MAC_40000FD) {
224 __set_bit(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT, linkmodes);
225 __set_bit(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT, linkmodes);
226 __set_bit(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT, linkmodes);
227 __set_bit(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT, linkmodes);
228 }
229
230 if (caps & MAC_50000FD) {
231 __set_bit(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT, linkmodes);
232 __set_bit(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT, linkmodes);
233 __set_bit(ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT, linkmodes);
234 __set_bit(ETHTOOL_LINK_MODE_50000baseKR_Full_BIT, linkmodes);
235 __set_bit(ETHTOOL_LINK_MODE_50000baseSR_Full_BIT, linkmodes);
236 __set_bit(ETHTOOL_LINK_MODE_50000baseCR_Full_BIT, linkmodes);
237 __set_bit(ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT,
238 linkmodes);
239 __set_bit(ETHTOOL_LINK_MODE_50000baseDR_Full_BIT, linkmodes);
240 }
241
242 if (caps & MAC_56000FD) {
243 __set_bit(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT, linkmodes);
244 __set_bit(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT, linkmodes);
245 __set_bit(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT, linkmodes);
246 __set_bit(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT, linkmodes);
247 }
248
249 if (caps & MAC_100000FD) {
250 __set_bit(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT, linkmodes);
251 __set_bit(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT, linkmodes);
252 __set_bit(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT, linkmodes);
253 __set_bit(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT,
254 linkmodes);
255 __set_bit(ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT, linkmodes);
256 __set_bit(ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT, linkmodes);
257 __set_bit(ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT, linkmodes);
258 __set_bit(ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT,
259 linkmodes);
260 __set_bit(ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT, linkmodes);
261 __set_bit(ETHTOOL_LINK_MODE_100000baseKR_Full_BIT, linkmodes);
262 __set_bit(ETHTOOL_LINK_MODE_100000baseSR_Full_BIT, linkmodes);
263 __set_bit(ETHTOOL_LINK_MODE_100000baseLR_ER_FR_Full_BIT,
264 linkmodes);
265 __set_bit(ETHTOOL_LINK_MODE_100000baseCR_Full_BIT, linkmodes);
266 __set_bit(ETHTOOL_LINK_MODE_100000baseDR_Full_BIT, linkmodes);
267 }
268
269 if (caps & MAC_200000FD) {
270 __set_bit(ETHTOOL_LINK_MODE_200000baseKR4_Full_BIT, linkmodes);
271 __set_bit(ETHTOOL_LINK_MODE_200000baseSR4_Full_BIT, linkmodes);
272 __set_bit(ETHTOOL_LINK_MODE_200000baseLR4_ER4_FR4_Full_BIT,
273 linkmodes);
274 __set_bit(ETHTOOL_LINK_MODE_200000baseDR4_Full_BIT, linkmodes);
275 __set_bit(ETHTOOL_LINK_MODE_200000baseCR4_Full_BIT, linkmodes);
276 __set_bit(ETHTOOL_LINK_MODE_200000baseKR2_Full_BIT, linkmodes);
277 __set_bit(ETHTOOL_LINK_MODE_200000baseSR2_Full_BIT, linkmodes);
278 __set_bit(ETHTOOL_LINK_MODE_200000baseLR2_ER2_FR2_Full_BIT,
279 linkmodes);
280 __set_bit(ETHTOOL_LINK_MODE_200000baseDR2_Full_BIT, linkmodes);
281 __set_bit(ETHTOOL_LINK_MODE_200000baseCR2_Full_BIT, linkmodes);
282 }
283
284 if (caps & MAC_400000FD) {
285 __set_bit(ETHTOOL_LINK_MODE_400000baseKR8_Full_BIT, linkmodes);
286 __set_bit(ETHTOOL_LINK_MODE_400000baseSR8_Full_BIT, linkmodes);
287 __set_bit(ETHTOOL_LINK_MODE_400000baseLR8_ER8_FR8_Full_BIT,
288 linkmodes);
289 __set_bit(ETHTOOL_LINK_MODE_400000baseDR8_Full_BIT, linkmodes);
290 __set_bit(ETHTOOL_LINK_MODE_400000baseCR8_Full_BIT, linkmodes);
291 __set_bit(ETHTOOL_LINK_MODE_400000baseKR4_Full_BIT, linkmodes);
292 __set_bit(ETHTOOL_LINK_MODE_400000baseSR4_Full_BIT, linkmodes);
293 __set_bit(ETHTOOL_LINK_MODE_400000baseLR4_ER4_FR4_Full_BIT,
294 linkmodes);
295 __set_bit(ETHTOOL_LINK_MODE_400000baseDR4_Full_BIT, linkmodes);
296 __set_bit(ETHTOOL_LINK_MODE_400000baseCR4_Full_BIT, linkmodes);
297 }
298 }
299
300 /**
301 * phylink_get_linkmodes() - get acceptable link modes
302 * @linkmodes: ethtool linkmode mask (must be already initialised)
303 * @interface: phy interface mode defined by &typedef phy_interface_t
304 * @mac_capabilities: bitmask of MAC capabilities
305 *
306 * Set all possible pause, speed and duplex linkmodes in @linkmodes that
307 * are supported by the @interface mode and @mac_capabilities. @linkmodes
308 * must have been initialised previously.
309 */
phylink_get_linkmodes(unsigned long * linkmodes,phy_interface_t interface,unsigned long mac_capabilities)310 void phylink_get_linkmodes(unsigned long *linkmodes, phy_interface_t interface,
311 unsigned long mac_capabilities)
312 {
313 unsigned long caps = MAC_SYM_PAUSE | MAC_ASYM_PAUSE;
314
315 switch (interface) {
316 case PHY_INTERFACE_MODE_USXGMII:
317 caps |= MAC_10000FD | MAC_5000FD | MAC_2500FD;
318 fallthrough;
319
320 case PHY_INTERFACE_MODE_RGMII_TXID:
321 case PHY_INTERFACE_MODE_RGMII_RXID:
322 case PHY_INTERFACE_MODE_RGMII_ID:
323 case PHY_INTERFACE_MODE_RGMII:
324 case PHY_INTERFACE_MODE_QSGMII:
325 case PHY_INTERFACE_MODE_SGMII:
326 case PHY_INTERFACE_MODE_GMII:
327 caps |= MAC_1000HD | MAC_1000FD;
328 fallthrough;
329
330 case PHY_INTERFACE_MODE_REVRMII:
331 case PHY_INTERFACE_MODE_RMII:
332 case PHY_INTERFACE_MODE_SMII:
333 case PHY_INTERFACE_MODE_REVMII:
334 case PHY_INTERFACE_MODE_MII:
335 caps |= MAC_10HD | MAC_10FD;
336 fallthrough;
337
338 case PHY_INTERFACE_MODE_100BASEX:
339 caps |= MAC_100HD | MAC_100FD;
340 break;
341
342 case PHY_INTERFACE_MODE_TBI:
343 case PHY_INTERFACE_MODE_MOCA:
344 case PHY_INTERFACE_MODE_RTBI:
345 case PHY_INTERFACE_MODE_1000BASEX:
346 caps |= MAC_1000HD;
347 fallthrough;
348 case PHY_INTERFACE_MODE_TRGMII:
349 caps |= MAC_1000FD;
350 break;
351
352 case PHY_INTERFACE_MODE_2500BASEX:
353 caps |= MAC_2500FD;
354 break;
355
356 case PHY_INTERFACE_MODE_5GBASER:
357 caps |= MAC_5000FD;
358 break;
359
360 case PHY_INTERFACE_MODE_XGMII:
361 case PHY_INTERFACE_MODE_RXAUI:
362 case PHY_INTERFACE_MODE_XAUI:
363 case PHY_INTERFACE_MODE_10GBASER:
364 case PHY_INTERFACE_MODE_10GKR:
365 caps |= MAC_10000FD;
366 break;
367
368 case PHY_INTERFACE_MODE_25GBASER:
369 caps |= MAC_25000FD;
370 break;
371
372 case PHY_INTERFACE_MODE_XLGMII:
373 caps |= MAC_40000FD;
374 break;
375
376 case PHY_INTERFACE_MODE_INTERNAL:
377 caps |= ~0;
378 break;
379
380 case PHY_INTERFACE_MODE_NA:
381 case PHY_INTERFACE_MODE_MAX:
382 break;
383 }
384
385 phylink_caps_to_linkmodes(linkmodes, caps & mac_capabilities);
386 }
387 EXPORT_SYMBOL_GPL(phylink_get_linkmodes);
388
389 /**
390 * phylink_generic_validate() - generic validate() callback implementation
391 * @config: a pointer to a &struct phylink_config.
392 * @supported: ethtool bitmask for supported link modes.
393 * @state: a pointer to a &struct phylink_link_state.
394 *
395 * Generic implementation of the validate() callback that MAC drivers can
396 * use when they pass the range of supported interfaces and MAC capabilities.
397 * This makes use of phylink_get_linkmodes().
398 */
phylink_generic_validate(struct phylink_config * config,unsigned long * supported,struct phylink_link_state * state)399 void phylink_generic_validate(struct phylink_config *config,
400 unsigned long *supported,
401 struct phylink_link_state *state)
402 {
403 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
404
405 phylink_set_port_modes(mask);
406 phylink_set(mask, Autoneg);
407 phylink_get_linkmodes(mask, state->interface, config->mac_capabilities);
408
409 linkmode_and(supported, supported, mask);
410 linkmode_and(state->advertising, state->advertising, mask);
411 }
412 EXPORT_SYMBOL_GPL(phylink_generic_validate);
413
phylink_validate_mac_and_pcs(struct phylink * pl,unsigned long * supported,struct phylink_link_state * state)414 static int phylink_validate_mac_and_pcs(struct phylink *pl,
415 unsigned long *supported,
416 struct phylink_link_state *state)
417 {
418 struct phylink_pcs *pcs;
419 int ret;
420
421 /* Get the PCS for this interface mode */
422 if (pl->using_mac_select_pcs) {
423 pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface);
424 if (IS_ERR(pcs))
425 return PTR_ERR(pcs);
426 } else {
427 pcs = pl->pcs;
428 }
429
430 if (pcs) {
431 /* The PCS, if present, must be setup before phylink_create()
432 * has been called. If the ops is not initialised, print an
433 * error and backtrace rather than oopsing the kernel.
434 */
435 if (!pcs->ops) {
436 phylink_err(pl, "interface %s: uninitialised PCS\n",
437 phy_modes(state->interface));
438 dump_stack();
439 return -EINVAL;
440 }
441
442 /* Validate the link parameters with the PCS */
443 if (pcs->ops->pcs_validate) {
444 ret = pcs->ops->pcs_validate(pcs, supported, state);
445 if (ret < 0 || phylink_is_empty_linkmode(supported))
446 return -EINVAL;
447
448 /* Ensure the advertising mask is a subset of the
449 * supported mask.
450 */
451 linkmode_and(state->advertising, state->advertising,
452 supported);
453 }
454 }
455
456 /* Then validate the link parameters with the MAC */
457 pl->mac_ops->validate(pl->config, supported, state);
458
459 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0;
460 }
461
phylink_validate_any(struct phylink * pl,unsigned long * supported,struct phylink_link_state * state)462 static int phylink_validate_any(struct phylink *pl, unsigned long *supported,
463 struct phylink_link_state *state)
464 {
465 __ETHTOOL_DECLARE_LINK_MODE_MASK(all_adv) = { 0, };
466 __ETHTOOL_DECLARE_LINK_MODE_MASK(all_s) = { 0, };
467 __ETHTOOL_DECLARE_LINK_MODE_MASK(s);
468 struct phylink_link_state t;
469 int intf;
470
471 for (intf = 0; intf < PHY_INTERFACE_MODE_MAX; intf++) {
472 if (test_bit(intf, pl->config->supported_interfaces)) {
473 linkmode_copy(s, supported);
474
475 t = *state;
476 t.interface = intf;
477 if (!phylink_validate_mac_and_pcs(pl, s, &t)) {
478 linkmode_or(all_s, all_s, s);
479 linkmode_or(all_adv, all_adv, t.advertising);
480 }
481 }
482 }
483
484 linkmode_copy(supported, all_s);
485 linkmode_copy(state->advertising, all_adv);
486
487 return phylink_is_empty_linkmode(supported) ? -EINVAL : 0;
488 }
489
phylink_validate(struct phylink * pl,unsigned long * supported,struct phylink_link_state * state)490 static int phylink_validate(struct phylink *pl, unsigned long *supported,
491 struct phylink_link_state *state)
492 {
493 if (!phy_interface_empty(pl->config->supported_interfaces)) {
494 if (state->interface == PHY_INTERFACE_MODE_NA)
495 return phylink_validate_any(pl, supported, state);
496
497 if (!test_bit(state->interface,
498 pl->config->supported_interfaces))
499 return -EINVAL;
500 }
501
502 return phylink_validate_mac_and_pcs(pl, supported, state);
503 }
504
phylink_parse_fixedlink(struct phylink * pl,struct fwnode_handle * fwnode)505 static int phylink_parse_fixedlink(struct phylink *pl,
506 struct fwnode_handle *fwnode)
507 {
508 struct fwnode_handle *fixed_node;
509 const struct phy_setting *s;
510 struct gpio_desc *desc;
511 u32 speed;
512 int ret;
513
514 fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link");
515 if (fixed_node) {
516 ret = fwnode_property_read_u32(fixed_node, "speed", &speed);
517
518 pl->link_config.speed = speed;
519 pl->link_config.duplex = DUPLEX_HALF;
520
521 if (fwnode_property_read_bool(fixed_node, "full-duplex"))
522 pl->link_config.duplex = DUPLEX_FULL;
523
524 /* We treat the "pause" and "asym-pause" terminology as
525 * defining the link partner's ability.
526 */
527 if (fwnode_property_read_bool(fixed_node, "pause"))
528 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
529 pl->link_config.lp_advertising);
530 if (fwnode_property_read_bool(fixed_node, "asym-pause"))
531 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
532 pl->link_config.lp_advertising);
533
534 if (ret == 0) {
535 desc = fwnode_gpiod_get_index(fixed_node, "link", 0,
536 GPIOD_IN, "?");
537
538 if (!IS_ERR(desc))
539 pl->link_gpio = desc;
540 else if (desc == ERR_PTR(-EPROBE_DEFER))
541 ret = -EPROBE_DEFER;
542 }
543 fwnode_handle_put(fixed_node);
544
545 if (ret)
546 return ret;
547 } else {
548 u32 prop[5];
549
550 ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
551 NULL, 0);
552 if (ret != ARRAY_SIZE(prop)) {
553 phylink_err(pl, "broken fixed-link?\n");
554 return -EINVAL;
555 }
556
557 ret = fwnode_property_read_u32_array(fwnode, "fixed-link",
558 prop, ARRAY_SIZE(prop));
559 if (!ret) {
560 pl->link_config.duplex = prop[1] ?
561 DUPLEX_FULL : DUPLEX_HALF;
562 pl->link_config.speed = prop[2];
563 if (prop[3])
564 __set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
565 pl->link_config.lp_advertising);
566 if (prop[4])
567 __set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
568 pl->link_config.lp_advertising);
569 }
570 }
571
572 if (pl->link_config.speed > SPEED_1000 &&
573 pl->link_config.duplex != DUPLEX_FULL)
574 phylink_warn(pl, "fixed link specifies half duplex for %dMbps link?\n",
575 pl->link_config.speed);
576
577 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
578 linkmode_copy(pl->link_config.advertising, pl->supported);
579 phylink_validate(pl, pl->supported, &pl->link_config);
580
581 s = phy_lookup_setting(pl->link_config.speed, pl->link_config.duplex,
582 pl->supported, true);
583 linkmode_zero(pl->supported);
584 phylink_set(pl->supported, MII);
585 phylink_set(pl->supported, Pause);
586 phylink_set(pl->supported, Asym_Pause);
587 phylink_set(pl->supported, Autoneg);
588 if (s) {
589 __set_bit(s->bit, pl->supported);
590 __set_bit(s->bit, pl->link_config.lp_advertising);
591 } else {
592 phylink_warn(pl, "fixed link %s duplex %dMbps not recognised\n",
593 pl->link_config.duplex == DUPLEX_FULL ? "full" : "half",
594 pl->link_config.speed);
595 }
596
597 linkmode_and(pl->link_config.advertising, pl->link_config.advertising,
598 pl->supported);
599
600 pl->link_config.link = 1;
601 pl->link_config.an_complete = 1;
602
603 return 0;
604 }
605
phylink_parse_mode(struct phylink * pl,struct fwnode_handle * fwnode)606 static int phylink_parse_mode(struct phylink *pl, struct fwnode_handle *fwnode)
607 {
608 struct fwnode_handle *dn;
609 const char *managed;
610
611 dn = fwnode_get_named_child_node(fwnode, "fixed-link");
612 if (dn || fwnode_property_present(fwnode, "fixed-link"))
613 pl->cfg_link_an_mode = MLO_AN_FIXED;
614 fwnode_handle_put(dn);
615
616 if ((fwnode_property_read_string(fwnode, "managed", &managed) == 0 &&
617 strcmp(managed, "in-band-status") == 0) ||
618 pl->config->ovr_an_inband) {
619 if (pl->cfg_link_an_mode == MLO_AN_FIXED) {
620 phylink_err(pl,
621 "can't use both fixed-link and in-band-status\n");
622 return -EINVAL;
623 }
624
625 linkmode_zero(pl->supported);
626 phylink_set(pl->supported, MII);
627 phylink_set(pl->supported, Autoneg);
628 phylink_set(pl->supported, Asym_Pause);
629 phylink_set(pl->supported, Pause);
630 pl->link_config.an_enabled = true;
631 pl->cfg_link_an_mode = MLO_AN_INBAND;
632
633 switch (pl->link_config.interface) {
634 case PHY_INTERFACE_MODE_SGMII:
635 case PHY_INTERFACE_MODE_QSGMII:
636 phylink_set(pl->supported, 10baseT_Half);
637 phylink_set(pl->supported, 10baseT_Full);
638 phylink_set(pl->supported, 100baseT_Half);
639 phylink_set(pl->supported, 100baseT_Full);
640 phylink_set(pl->supported, 1000baseT_Half);
641 phylink_set(pl->supported, 1000baseT_Full);
642 break;
643
644 case PHY_INTERFACE_MODE_1000BASEX:
645 phylink_set(pl->supported, 1000baseX_Full);
646 break;
647
648 case PHY_INTERFACE_MODE_2500BASEX:
649 phylink_set(pl->supported, 2500baseX_Full);
650 break;
651
652 case PHY_INTERFACE_MODE_5GBASER:
653 phylink_set(pl->supported, 5000baseT_Full);
654 break;
655
656 case PHY_INTERFACE_MODE_25GBASER:
657 phylink_set(pl->supported, 25000baseCR_Full);
658 phylink_set(pl->supported, 25000baseKR_Full);
659 phylink_set(pl->supported, 25000baseSR_Full);
660 fallthrough;
661 case PHY_INTERFACE_MODE_USXGMII:
662 case PHY_INTERFACE_MODE_10GKR:
663 case PHY_INTERFACE_MODE_10GBASER:
664 phylink_set(pl->supported, 10baseT_Half);
665 phylink_set(pl->supported, 10baseT_Full);
666 phylink_set(pl->supported, 100baseT_Half);
667 phylink_set(pl->supported, 100baseT_Full);
668 phylink_set(pl->supported, 1000baseT_Half);
669 phylink_set(pl->supported, 1000baseT_Full);
670 phylink_set(pl->supported, 1000baseX_Full);
671 phylink_set(pl->supported, 1000baseKX_Full);
672 phylink_set(pl->supported, 2500baseT_Full);
673 phylink_set(pl->supported, 2500baseX_Full);
674 phylink_set(pl->supported, 5000baseT_Full);
675 phylink_set(pl->supported, 10000baseT_Full);
676 phylink_set(pl->supported, 10000baseKR_Full);
677 phylink_set(pl->supported, 10000baseKX4_Full);
678 phylink_set(pl->supported, 10000baseCR_Full);
679 phylink_set(pl->supported, 10000baseSR_Full);
680 phylink_set(pl->supported, 10000baseLR_Full);
681 phylink_set(pl->supported, 10000baseLRM_Full);
682 phylink_set(pl->supported, 10000baseER_Full);
683 break;
684
685 case PHY_INTERFACE_MODE_XLGMII:
686 phylink_set(pl->supported, 25000baseCR_Full);
687 phylink_set(pl->supported, 25000baseKR_Full);
688 phylink_set(pl->supported, 25000baseSR_Full);
689 phylink_set(pl->supported, 40000baseKR4_Full);
690 phylink_set(pl->supported, 40000baseCR4_Full);
691 phylink_set(pl->supported, 40000baseSR4_Full);
692 phylink_set(pl->supported, 40000baseLR4_Full);
693 phylink_set(pl->supported, 50000baseCR2_Full);
694 phylink_set(pl->supported, 50000baseKR2_Full);
695 phylink_set(pl->supported, 50000baseSR2_Full);
696 phylink_set(pl->supported, 50000baseKR_Full);
697 phylink_set(pl->supported, 50000baseSR_Full);
698 phylink_set(pl->supported, 50000baseCR_Full);
699 phylink_set(pl->supported, 50000baseLR_ER_FR_Full);
700 phylink_set(pl->supported, 50000baseDR_Full);
701 phylink_set(pl->supported, 100000baseKR4_Full);
702 phylink_set(pl->supported, 100000baseSR4_Full);
703 phylink_set(pl->supported, 100000baseCR4_Full);
704 phylink_set(pl->supported, 100000baseLR4_ER4_Full);
705 phylink_set(pl->supported, 100000baseKR2_Full);
706 phylink_set(pl->supported, 100000baseSR2_Full);
707 phylink_set(pl->supported, 100000baseCR2_Full);
708 phylink_set(pl->supported, 100000baseLR2_ER2_FR2_Full);
709 phylink_set(pl->supported, 100000baseDR2_Full);
710 break;
711
712 default:
713 phylink_err(pl,
714 "incorrect link mode %s for in-band status\n",
715 phy_modes(pl->link_config.interface));
716 return -EINVAL;
717 }
718
719 linkmode_copy(pl->link_config.advertising, pl->supported);
720
721 if (phylink_validate(pl, pl->supported, &pl->link_config)) {
722 phylink_err(pl,
723 "failed to validate link configuration for in-band status\n");
724 return -EINVAL;
725 }
726
727 /* Check if MAC/PCS also supports Autoneg. */
728 pl->link_config.an_enabled = phylink_test(pl->supported, Autoneg);
729 }
730
731 return 0;
732 }
733
phylink_apply_manual_flow(struct phylink * pl,struct phylink_link_state * state)734 static void phylink_apply_manual_flow(struct phylink *pl,
735 struct phylink_link_state *state)
736 {
737 /* If autoneg is disabled, pause AN is also disabled */
738 if (!state->an_enabled)
739 state->pause &= ~MLO_PAUSE_AN;
740
741 /* Manual configuration of pause modes */
742 if (!(pl->link_config.pause & MLO_PAUSE_AN))
743 state->pause = pl->link_config.pause;
744 }
745
phylink_resolve_flow(struct phylink_link_state * state)746 static void phylink_resolve_flow(struct phylink_link_state *state)
747 {
748 bool tx_pause, rx_pause;
749
750 state->pause = MLO_PAUSE_NONE;
751 if (state->duplex == DUPLEX_FULL) {
752 linkmode_resolve_pause(state->advertising,
753 state->lp_advertising,
754 &tx_pause, &rx_pause);
755 if (tx_pause)
756 state->pause |= MLO_PAUSE_TX;
757 if (rx_pause)
758 state->pause |= MLO_PAUSE_RX;
759 }
760 }
761
phylink_mac_config(struct phylink * pl,const struct phylink_link_state * state)762 static void phylink_mac_config(struct phylink *pl,
763 const struct phylink_link_state *state)
764 {
765 phylink_dbg(pl,
766 "%s: mode=%s/%s/%s/%s adv=%*pb pause=%02x link=%u an=%u\n",
767 __func__, phylink_an_mode_str(pl->cur_link_an_mode),
768 phy_modes(state->interface),
769 phy_speed_to_str(state->speed),
770 phy_duplex_to_str(state->duplex),
771 __ETHTOOL_LINK_MODE_MASK_NBITS, state->advertising,
772 state->pause, state->link, state->an_enabled);
773
774 pl->mac_ops->mac_config(pl->config, pl->cur_link_an_mode, state);
775 }
776
phylink_mac_pcs_an_restart(struct phylink * pl)777 static void phylink_mac_pcs_an_restart(struct phylink *pl)
778 {
779 if (pl->link_config.an_enabled &&
780 phy_interface_mode_is_8023z(pl->link_config.interface) &&
781 phylink_autoneg_inband(pl->cur_link_an_mode)) {
782 if (pl->pcs_ops)
783 pl->pcs_ops->pcs_an_restart(pl->pcs);
784 else if (pl->config->legacy_pre_march2020)
785 pl->mac_ops->mac_an_restart(pl->config);
786 }
787 }
788
phylink_major_config(struct phylink * pl,bool restart,const struct phylink_link_state * state)789 static void phylink_major_config(struct phylink *pl, bool restart,
790 const struct phylink_link_state *state)
791 {
792 struct phylink_pcs *pcs = NULL;
793 int err;
794
795 phylink_dbg(pl, "major config %s\n", phy_modes(state->interface));
796
797 if (pl->using_mac_select_pcs) {
798 pcs = pl->mac_ops->mac_select_pcs(pl->config, state->interface);
799 if (IS_ERR(pcs)) {
800 phylink_err(pl,
801 "mac_select_pcs unexpectedly failed: %pe\n",
802 pcs);
803 return;
804 }
805 }
806
807 if (pl->mac_ops->mac_prepare) {
808 err = pl->mac_ops->mac_prepare(pl->config, pl->cur_link_an_mode,
809 state->interface);
810 if (err < 0) {
811 phylink_err(pl, "mac_prepare failed: %pe\n",
812 ERR_PTR(err));
813 return;
814 }
815 }
816
817 /* If we have a new PCS, switch to the new PCS after preparing the MAC
818 * for the change.
819 */
820 if (pcs) {
821 pl->pcs = pcs;
822 pl->pcs_ops = pcs->ops;
823
824 if (!pl->phylink_disable_state &&
825 pl->cfg_link_an_mode == MLO_AN_INBAND) {
826 if (pcs->poll)
827 mod_timer(&pl->link_poll, jiffies + HZ);
828 else
829 del_timer(&pl->link_poll);
830 }
831 }
832
833 phylink_mac_config(pl, state);
834
835 if (pl->pcs_ops) {
836 err = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode,
837 state->interface,
838 state->advertising,
839 !!(pl->link_config.pause &
840 MLO_PAUSE_AN));
841 if (err < 0)
842 phylink_err(pl, "pcs_config failed: %pe\n",
843 ERR_PTR(err));
844 if (err > 0)
845 restart = true;
846 }
847 if (restart)
848 phylink_mac_pcs_an_restart(pl);
849
850 if (pl->mac_ops->mac_finish) {
851 err = pl->mac_ops->mac_finish(pl->config, pl->cur_link_an_mode,
852 state->interface);
853 if (err < 0)
854 phylink_err(pl, "mac_finish failed: %pe\n",
855 ERR_PTR(err));
856 }
857 }
858
859 /*
860 * Reconfigure for a change of inband advertisement.
861 * If we have a separate PCS, we only need to call its pcs_config() method,
862 * and then restart AN if it indicates something changed. Otherwise, we do
863 * the full MAC reconfiguration.
864 */
phylink_change_inband_advert(struct phylink * pl)865 static int phylink_change_inband_advert(struct phylink *pl)
866 {
867 int ret;
868
869 if (test_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state))
870 return 0;
871
872 if (!pl->pcs_ops && pl->config->legacy_pre_march2020) {
873 /* Legacy method */
874 phylink_mac_config(pl, &pl->link_config);
875 phylink_mac_pcs_an_restart(pl);
876 return 0;
877 }
878
879 phylink_dbg(pl, "%s: mode=%s/%s adv=%*pb pause=%02x\n", __func__,
880 phylink_an_mode_str(pl->cur_link_an_mode),
881 phy_modes(pl->link_config.interface),
882 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->link_config.advertising,
883 pl->link_config.pause);
884
885 /* Modern PCS-based method; update the advert at the PCS, and
886 * restart negotiation if the pcs_config() helper indicates that
887 * the programmed advertisement has changed.
888 */
889 ret = pl->pcs_ops->pcs_config(pl->pcs, pl->cur_link_an_mode,
890 pl->link_config.interface,
891 pl->link_config.advertising,
892 !!(pl->link_config.pause & MLO_PAUSE_AN));
893 if (ret < 0)
894 return ret;
895
896 if (ret > 0)
897 phylink_mac_pcs_an_restart(pl);
898
899 return 0;
900 }
901
phylink_mac_pcs_get_state(struct phylink * pl,struct phylink_link_state * state)902 static void phylink_mac_pcs_get_state(struct phylink *pl,
903 struct phylink_link_state *state)
904 {
905 linkmode_copy(state->advertising, pl->link_config.advertising);
906 linkmode_zero(state->lp_advertising);
907 state->interface = pl->link_config.interface;
908 state->an_enabled = pl->link_config.an_enabled;
909 if (state->an_enabled) {
910 state->speed = SPEED_UNKNOWN;
911 state->duplex = DUPLEX_UNKNOWN;
912 state->pause = MLO_PAUSE_NONE;
913 } else {
914 state->speed = pl->link_config.speed;
915 state->duplex = pl->link_config.duplex;
916 state->pause = pl->link_config.pause;
917 }
918 state->an_complete = 0;
919 state->link = 1;
920
921 if (pl->pcs_ops)
922 pl->pcs_ops->pcs_get_state(pl->pcs, state);
923 else if (pl->mac_ops->mac_pcs_get_state &&
924 pl->config->legacy_pre_march2020)
925 pl->mac_ops->mac_pcs_get_state(pl->config, state);
926 else
927 state->link = 0;
928 }
929
930 /* The fixed state is... fixed except for the link state,
931 * which may be determined by a GPIO or a callback.
932 */
phylink_get_fixed_state(struct phylink * pl,struct phylink_link_state * state)933 static void phylink_get_fixed_state(struct phylink *pl,
934 struct phylink_link_state *state)
935 {
936 *state = pl->link_config;
937 if (pl->config->get_fixed_state)
938 pl->config->get_fixed_state(pl->config, state);
939 else if (pl->link_gpio)
940 state->link = !!gpiod_get_value_cansleep(pl->link_gpio);
941
942 phylink_resolve_flow(state);
943 }
944
phylink_mac_initial_config(struct phylink * pl,bool force_restart)945 static void phylink_mac_initial_config(struct phylink *pl, bool force_restart)
946 {
947 struct phylink_link_state link_state;
948
949 switch (pl->cur_link_an_mode) {
950 case MLO_AN_PHY:
951 link_state = pl->phy_state;
952 break;
953
954 case MLO_AN_FIXED:
955 phylink_get_fixed_state(pl, &link_state);
956 break;
957
958 case MLO_AN_INBAND:
959 link_state = pl->link_config;
960 if (link_state.interface == PHY_INTERFACE_MODE_SGMII)
961 link_state.pause = MLO_PAUSE_NONE;
962 break;
963
964 default: /* can't happen */
965 return;
966 }
967
968 link_state.link = false;
969
970 phylink_apply_manual_flow(pl, &link_state);
971 phylink_major_config(pl, force_restart, &link_state);
972 }
973
phylink_pause_to_str(int pause)974 static const char *phylink_pause_to_str(int pause)
975 {
976 switch (pause & MLO_PAUSE_TXRX_MASK) {
977 case MLO_PAUSE_TX | MLO_PAUSE_RX:
978 return "rx/tx";
979 case MLO_PAUSE_TX:
980 return "tx";
981 case MLO_PAUSE_RX:
982 return "rx";
983 default:
984 return "off";
985 }
986 }
987
phylink_link_up(struct phylink * pl,struct phylink_link_state link_state)988 static void phylink_link_up(struct phylink *pl,
989 struct phylink_link_state link_state)
990 {
991 struct net_device *ndev = pl->netdev;
992
993 pl->cur_interface = link_state.interface;
994
995 if (pl->pcs_ops && pl->pcs_ops->pcs_link_up)
996 pl->pcs_ops->pcs_link_up(pl->pcs, pl->cur_link_an_mode,
997 pl->cur_interface,
998 link_state.speed, link_state.duplex);
999
1000 pl->mac_ops->mac_link_up(pl->config, pl->phydev,
1001 pl->cur_link_an_mode, pl->cur_interface,
1002 link_state.speed, link_state.duplex,
1003 !!(link_state.pause & MLO_PAUSE_TX),
1004 !!(link_state.pause & MLO_PAUSE_RX));
1005
1006 if (ndev)
1007 netif_carrier_on(ndev);
1008
1009 phylink_info(pl,
1010 "Link is Up - %s/%s - flow control %s\n",
1011 phy_speed_to_str(link_state.speed),
1012 phy_duplex_to_str(link_state.duplex),
1013 phylink_pause_to_str(link_state.pause));
1014 }
1015
phylink_link_down(struct phylink * pl)1016 static void phylink_link_down(struct phylink *pl)
1017 {
1018 struct net_device *ndev = pl->netdev;
1019
1020 if (ndev)
1021 netif_carrier_off(ndev);
1022 pl->mac_ops->mac_link_down(pl->config, pl->cur_link_an_mode,
1023 pl->cur_interface);
1024 phylink_info(pl, "Link is Down\n");
1025 }
1026
phylink_resolve(struct work_struct * w)1027 static void phylink_resolve(struct work_struct *w)
1028 {
1029 struct phylink *pl = container_of(w, struct phylink, resolve);
1030 struct phylink_link_state link_state;
1031 struct net_device *ndev = pl->netdev;
1032 bool mac_config = false;
1033 bool retrigger = false;
1034 bool cur_link_state;
1035
1036 mutex_lock(&pl->state_mutex);
1037 if (pl->netdev)
1038 cur_link_state = netif_carrier_ok(ndev);
1039 else
1040 cur_link_state = pl->old_link_state;
1041
1042 if (pl->phylink_disable_state) {
1043 pl->mac_link_dropped = false;
1044 link_state.link = false;
1045 } else if (pl->mac_link_dropped) {
1046 link_state.link = false;
1047 retrigger = true;
1048 } else {
1049 switch (pl->cur_link_an_mode) {
1050 case MLO_AN_PHY:
1051 link_state = pl->phy_state;
1052 phylink_apply_manual_flow(pl, &link_state);
1053 mac_config = link_state.link;
1054 break;
1055
1056 case MLO_AN_FIXED:
1057 phylink_get_fixed_state(pl, &link_state);
1058 mac_config = link_state.link;
1059 break;
1060
1061 case MLO_AN_INBAND:
1062 phylink_mac_pcs_get_state(pl, &link_state);
1063
1064 /* The PCS may have a latching link-fail indicator.
1065 * If the link was up, bring the link down and
1066 * re-trigger the resolve. Otherwise, re-read the
1067 * PCS state to get the current status of the link.
1068 */
1069 if (!link_state.link) {
1070 if (cur_link_state)
1071 retrigger = true;
1072 else
1073 phylink_mac_pcs_get_state(pl,
1074 &link_state);
1075 }
1076
1077 /* If we have a phy, the "up" state is the union of
1078 * both the PHY and the MAC
1079 */
1080 if (pl->phydev)
1081 link_state.link &= pl->phy_state.link;
1082
1083 /* Only update if the PHY link is up */
1084 if (pl->phydev && pl->phy_state.link) {
1085 /* If the interface has changed, force a
1086 * link down event if the link isn't already
1087 * down, and re-resolve.
1088 */
1089 if (link_state.interface !=
1090 pl->phy_state.interface) {
1091 retrigger = true;
1092 link_state.link = false;
1093 }
1094 link_state.interface = pl->phy_state.interface;
1095
1096 /* If we have a PHY, we need to update with
1097 * the PHY flow control bits.
1098 */
1099 link_state.pause = pl->phy_state.pause;
1100 mac_config = true;
1101 }
1102 phylink_apply_manual_flow(pl, &link_state);
1103 break;
1104 }
1105 }
1106
1107 if (mac_config) {
1108 if (link_state.interface != pl->link_config.interface) {
1109 /* The interface has changed, force the link down and
1110 * then reconfigure.
1111 */
1112 if (cur_link_state) {
1113 phylink_link_down(pl);
1114 cur_link_state = false;
1115 }
1116 phylink_major_config(pl, false, &link_state);
1117 pl->link_config.interface = link_state.interface;
1118 } else if (!pl->pcs_ops && pl->config->legacy_pre_march2020) {
1119 /* The interface remains unchanged, only the speed,
1120 * duplex or pause settings have changed. Call the
1121 * old mac_config() method to configure the MAC/PCS
1122 * only if we do not have a legacy MAC driver.
1123 */
1124 phylink_mac_config(pl, &link_state);
1125 }
1126 }
1127
1128 if (link_state.link != cur_link_state) {
1129 pl->old_link_state = link_state.link;
1130 if (!link_state.link)
1131 phylink_link_down(pl);
1132 else
1133 phylink_link_up(pl, link_state);
1134 }
1135 if (!link_state.link && retrigger) {
1136 pl->mac_link_dropped = false;
1137 queue_work(system_power_efficient_wq, &pl->resolve);
1138 }
1139 mutex_unlock(&pl->state_mutex);
1140 }
1141
phylink_run_resolve(struct phylink * pl)1142 static void phylink_run_resolve(struct phylink *pl)
1143 {
1144 if (!pl->phylink_disable_state)
1145 queue_work(system_power_efficient_wq, &pl->resolve);
1146 }
1147
phylink_run_resolve_and_disable(struct phylink * pl,int bit)1148 static void phylink_run_resolve_and_disable(struct phylink *pl, int bit)
1149 {
1150 unsigned long state = pl->phylink_disable_state;
1151
1152 set_bit(bit, &pl->phylink_disable_state);
1153 if (state == 0) {
1154 queue_work(system_power_efficient_wq, &pl->resolve);
1155 flush_work(&pl->resolve);
1156 }
1157 }
1158
phylink_enable_and_run_resolve(struct phylink * pl,int bit)1159 static void phylink_enable_and_run_resolve(struct phylink *pl, int bit)
1160 {
1161 clear_bit(bit, &pl->phylink_disable_state);
1162 phylink_run_resolve(pl);
1163 }
1164
phylink_fixed_poll(struct timer_list * t)1165 static void phylink_fixed_poll(struct timer_list *t)
1166 {
1167 struct phylink *pl = container_of(t, struct phylink, link_poll);
1168
1169 mod_timer(t, jiffies + HZ);
1170
1171 phylink_run_resolve(pl);
1172 }
1173
1174 static const struct sfp_upstream_ops sfp_phylink_ops;
1175
phylink_register_sfp(struct phylink * pl,struct fwnode_handle * fwnode)1176 static int phylink_register_sfp(struct phylink *pl,
1177 struct fwnode_handle *fwnode)
1178 {
1179 struct sfp_bus *bus;
1180 int ret;
1181
1182 if (!fwnode)
1183 return 0;
1184
1185 bus = sfp_bus_find_fwnode(fwnode);
1186 if (IS_ERR(bus)) {
1187 phylink_err(pl, "unable to attach SFP bus: %pe\n", bus);
1188 return PTR_ERR(bus);
1189 }
1190
1191 pl->sfp_bus = bus;
1192
1193 ret = sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops);
1194 sfp_bus_put(bus);
1195
1196 return ret;
1197 }
1198
1199 /**
1200 * phylink_create() - create a phylink instance
1201 * @config: a pointer to the target &struct phylink_config
1202 * @fwnode: a pointer to a &struct fwnode_handle describing the network
1203 * interface
1204 * @iface: the desired link mode defined by &typedef phy_interface_t
1205 * @mac_ops: a pointer to a &struct phylink_mac_ops for the MAC.
1206 *
1207 * Create a new phylink instance, and parse the link parameters found in @np.
1208 * This will parse in-band modes, fixed-link or SFP configuration.
1209 *
1210 * Note: the rtnl lock must not be held when calling this function.
1211 *
1212 * Returns a pointer to a &struct phylink, or an error-pointer value. Users
1213 * must use IS_ERR() to check for errors from this function.
1214 */
phylink_create(struct phylink_config * config,struct fwnode_handle * fwnode,phy_interface_t iface,const struct phylink_mac_ops * mac_ops)1215 struct phylink *phylink_create(struct phylink_config *config,
1216 struct fwnode_handle *fwnode,
1217 phy_interface_t iface,
1218 const struct phylink_mac_ops *mac_ops)
1219 {
1220 bool using_mac_select_pcs = false;
1221 struct phylink *pl;
1222 int ret;
1223
1224 if (mac_ops->mac_select_pcs &&
1225 mac_ops->mac_select_pcs(config, PHY_INTERFACE_MODE_NA) !=
1226 ERR_PTR(-EOPNOTSUPP))
1227 using_mac_select_pcs = true;
1228
1229 /* Validate the supplied configuration */
1230 if (using_mac_select_pcs &&
1231 phy_interface_empty(config->supported_interfaces)) {
1232 dev_err(config->dev,
1233 "phylink: error: empty supported_interfaces but mac_select_pcs() method present\n");
1234 return ERR_PTR(-EINVAL);
1235 }
1236
1237 pl = kzalloc(sizeof(*pl), GFP_KERNEL);
1238 if (!pl)
1239 return ERR_PTR(-ENOMEM);
1240
1241 mutex_init(&pl->state_mutex);
1242 INIT_WORK(&pl->resolve, phylink_resolve);
1243
1244 pl->config = config;
1245 if (config->type == PHYLINK_NETDEV) {
1246 pl->netdev = to_net_dev(config->dev);
1247 } else if (config->type == PHYLINK_DEV) {
1248 pl->dev = config->dev;
1249 } else {
1250 kfree(pl);
1251 return ERR_PTR(-EINVAL);
1252 }
1253
1254 pl->using_mac_select_pcs = using_mac_select_pcs;
1255 pl->phy_state.interface = iface;
1256 pl->link_interface = iface;
1257 if (iface == PHY_INTERFACE_MODE_MOCA)
1258 pl->link_port = PORT_BNC;
1259 else
1260 pl->link_port = PORT_MII;
1261 pl->link_config.interface = iface;
1262 pl->link_config.pause = MLO_PAUSE_AN;
1263 pl->link_config.speed = SPEED_UNKNOWN;
1264 pl->link_config.duplex = DUPLEX_UNKNOWN;
1265 pl->link_config.an_enabled = true;
1266 pl->mac_ops = mac_ops;
1267 __set_bit(PHYLINK_DISABLE_STOPPED, &pl->phylink_disable_state);
1268 timer_setup(&pl->link_poll, phylink_fixed_poll, 0);
1269
1270 bitmap_fill(pl->supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
1271 linkmode_copy(pl->link_config.advertising, pl->supported);
1272 phylink_validate(pl, pl->supported, &pl->link_config);
1273
1274 ret = phylink_parse_mode(pl, fwnode);
1275 if (ret < 0) {
1276 kfree(pl);
1277 return ERR_PTR(ret);
1278 }
1279
1280 if (pl->cfg_link_an_mode == MLO_AN_FIXED) {
1281 ret = phylink_parse_fixedlink(pl, fwnode);
1282 if (ret < 0) {
1283 kfree(pl);
1284 return ERR_PTR(ret);
1285 }
1286 }
1287
1288 pl->cur_link_an_mode = pl->cfg_link_an_mode;
1289
1290 ret = phylink_register_sfp(pl, fwnode);
1291 if (ret < 0) {
1292 kfree(pl);
1293 return ERR_PTR(ret);
1294 }
1295
1296 return pl;
1297 }
1298 EXPORT_SYMBOL_GPL(phylink_create);
1299
1300 /**
1301 * phylink_destroy() - cleanup and destroy the phylink instance
1302 * @pl: a pointer to a &struct phylink returned from phylink_create()
1303 *
1304 * Destroy a phylink instance. Any PHY that has been attached must have been
1305 * cleaned up via phylink_disconnect_phy() prior to calling this function.
1306 *
1307 * Note: the rtnl lock must not be held when calling this function.
1308 */
phylink_destroy(struct phylink * pl)1309 void phylink_destroy(struct phylink *pl)
1310 {
1311 sfp_bus_del_upstream(pl->sfp_bus);
1312 if (pl->link_gpio)
1313 gpiod_put(pl->link_gpio);
1314
1315 cancel_work_sync(&pl->resolve);
1316 kfree(pl);
1317 }
1318 EXPORT_SYMBOL_GPL(phylink_destroy);
1319
phylink_phy_change(struct phy_device * phydev,bool up)1320 static void phylink_phy_change(struct phy_device *phydev, bool up)
1321 {
1322 struct phylink *pl = phydev->phylink;
1323 bool tx_pause, rx_pause;
1324
1325 phy_get_pause(phydev, &tx_pause, &rx_pause);
1326
1327 mutex_lock(&pl->state_mutex);
1328 pl->phy_state.speed = phydev->speed;
1329 pl->phy_state.duplex = phydev->duplex;
1330 pl->phy_state.pause = MLO_PAUSE_NONE;
1331 if (tx_pause)
1332 pl->phy_state.pause |= MLO_PAUSE_TX;
1333 if (rx_pause)
1334 pl->phy_state.pause |= MLO_PAUSE_RX;
1335 pl->phy_state.interface = phydev->interface;
1336 pl->phy_state.link = up;
1337 mutex_unlock(&pl->state_mutex);
1338
1339 phylink_run_resolve(pl);
1340
1341 phylink_dbg(pl, "phy link %s %s/%s/%s/%s\n", up ? "up" : "down",
1342 phy_modes(phydev->interface),
1343 phy_speed_to_str(phydev->speed),
1344 phy_duplex_to_str(phydev->duplex),
1345 phylink_pause_to_str(pl->phy_state.pause));
1346 }
1347
phylink_bringup_phy(struct phylink * pl,struct phy_device * phy,phy_interface_t interface)1348 static int phylink_bringup_phy(struct phylink *pl, struct phy_device *phy,
1349 phy_interface_t interface)
1350 {
1351 struct phylink_link_state config;
1352 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
1353 char *irq_str;
1354 int ret;
1355
1356 /*
1357 * This is the new way of dealing with flow control for PHYs,
1358 * as described by Timur Tabi in commit 529ed1275263 ("net: phy:
1359 * phy drivers should not set SUPPORTED_[Asym_]Pause") except
1360 * using our validate call to the MAC, we rely upon the MAC
1361 * clearing the bits from both supported and advertising fields.
1362 */
1363 phy_support_asym_pause(phy);
1364
1365 memset(&config, 0, sizeof(config));
1366 linkmode_copy(supported, phy->supported);
1367 linkmode_copy(config.advertising, phy->advertising);
1368
1369 /* Clause 45 PHYs switch their Serdes lane between several different
1370 * modes, normally 10GBASE-R, SGMII. Some use 2500BASE-X for 2.5G
1371 * speeds. We really need to know which interface modes the PHY and
1372 * MAC supports to properly work out which linkmodes can be supported.
1373 */
1374 if (phy->is_c45 &&
1375 interface != PHY_INTERFACE_MODE_RXAUI &&
1376 interface != PHY_INTERFACE_MODE_XAUI &&
1377 interface != PHY_INTERFACE_MODE_USXGMII)
1378 config.interface = PHY_INTERFACE_MODE_NA;
1379 else
1380 config.interface = interface;
1381
1382 ret = phylink_validate(pl, supported, &config);
1383 if (ret) {
1384 phylink_warn(pl, "validation of %s with support %*pb and advertisement %*pb failed: %pe\n",
1385 phy_modes(config.interface),
1386 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->supported,
1387 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising,
1388 ERR_PTR(ret));
1389 return ret;
1390 }
1391
1392 phy->phylink = pl;
1393 phy->phy_link_change = phylink_phy_change;
1394
1395 irq_str = phy_attached_info_irq(phy);
1396 phylink_info(pl,
1397 "PHY [%s] driver [%s] (irq=%s)\n",
1398 dev_name(&phy->mdio.dev), phy->drv->name, irq_str);
1399 kfree(irq_str);
1400
1401 mutex_lock(&phy->lock);
1402 mutex_lock(&pl->state_mutex);
1403 pl->phydev = phy;
1404 pl->phy_state.interface = interface;
1405 pl->phy_state.pause = MLO_PAUSE_NONE;
1406 pl->phy_state.speed = SPEED_UNKNOWN;
1407 pl->phy_state.duplex = DUPLEX_UNKNOWN;
1408 linkmode_copy(pl->supported, supported);
1409 linkmode_copy(pl->link_config.advertising, config.advertising);
1410
1411 /* Restrict the phy advertisement according to the MAC support. */
1412 linkmode_copy(phy->advertising, config.advertising);
1413 mutex_unlock(&pl->state_mutex);
1414 mutex_unlock(&phy->lock);
1415
1416 phylink_dbg(pl,
1417 "phy: %s setting supported %*pb advertising %*pb\n",
1418 phy_modes(interface),
1419 __ETHTOOL_LINK_MODE_MASK_NBITS, pl->supported,
1420 __ETHTOOL_LINK_MODE_MASK_NBITS, phy->advertising);
1421
1422 if (phy_interrupt_is_valid(phy))
1423 phy_request_interrupt(phy);
1424
1425 return 0;
1426 }
1427
phylink_attach_phy(struct phylink * pl,struct phy_device * phy,phy_interface_t interface)1428 static int phylink_attach_phy(struct phylink *pl, struct phy_device *phy,
1429 phy_interface_t interface)
1430 {
1431 if (WARN_ON(pl->cfg_link_an_mode == MLO_AN_FIXED ||
1432 (pl->cfg_link_an_mode == MLO_AN_INBAND &&
1433 phy_interface_mode_is_8023z(interface))))
1434 return -EINVAL;
1435
1436 if (pl->phydev)
1437 return -EBUSY;
1438
1439 return phy_attach_direct(pl->netdev, phy, 0, interface);
1440 }
1441
1442 /**
1443 * phylink_connect_phy() - connect a PHY to the phylink instance
1444 * @pl: a pointer to a &struct phylink returned from phylink_create()
1445 * @phy: a pointer to a &struct phy_device.
1446 *
1447 * Connect @phy to the phylink instance specified by @pl by calling
1448 * phy_attach_direct(). Configure the @phy according to the MAC driver's
1449 * capabilities, start the PHYLIB state machine and enable any interrupts
1450 * that the PHY supports.
1451 *
1452 * This updates the phylink's ethtool supported and advertising link mode
1453 * masks.
1454 *
1455 * Returns 0 on success or a negative errno.
1456 */
phylink_connect_phy(struct phylink * pl,struct phy_device * phy)1457 int phylink_connect_phy(struct phylink *pl, struct phy_device *phy)
1458 {
1459 int ret;
1460
1461 /* Use PHY device/driver interface */
1462 if (pl->link_interface == PHY_INTERFACE_MODE_NA) {
1463 pl->link_interface = phy->interface;
1464 pl->link_config.interface = pl->link_interface;
1465 }
1466
1467 ret = phylink_attach_phy(pl, phy, pl->link_interface);
1468 if (ret < 0)
1469 return ret;
1470
1471 ret = phylink_bringup_phy(pl, phy, pl->link_config.interface);
1472 if (ret)
1473 phy_detach(phy);
1474
1475 return ret;
1476 }
1477 EXPORT_SYMBOL_GPL(phylink_connect_phy);
1478
1479 /**
1480 * phylink_of_phy_connect() - connect the PHY specified in the DT mode.
1481 * @pl: a pointer to a &struct phylink returned from phylink_create()
1482 * @dn: a pointer to a &struct device_node.
1483 * @flags: PHY-specific flags to communicate to the PHY device driver
1484 *
1485 * Connect the phy specified in the device node @dn to the phylink instance
1486 * specified by @pl. Actions specified in phylink_connect_phy() will be
1487 * performed.
1488 *
1489 * Returns 0 on success or a negative errno.
1490 */
phylink_of_phy_connect(struct phylink * pl,struct device_node * dn,u32 flags)1491 int phylink_of_phy_connect(struct phylink *pl, struct device_node *dn,
1492 u32 flags)
1493 {
1494 return phylink_fwnode_phy_connect(pl, of_fwnode_handle(dn), flags);
1495 }
1496 EXPORT_SYMBOL_GPL(phylink_of_phy_connect);
1497
1498 /**
1499 * phylink_fwnode_phy_connect() - connect the PHY specified in the fwnode.
1500 * @pl: a pointer to a &struct phylink returned from phylink_create()
1501 * @fwnode: a pointer to a &struct fwnode_handle.
1502 * @flags: PHY-specific flags to communicate to the PHY device driver
1503 *
1504 * Connect the phy specified @fwnode to the phylink instance specified
1505 * by @pl.
1506 *
1507 * Returns 0 on success or a negative errno.
1508 */
phylink_fwnode_phy_connect(struct phylink * pl,struct fwnode_handle * fwnode,u32 flags)1509 int phylink_fwnode_phy_connect(struct phylink *pl,
1510 struct fwnode_handle *fwnode,
1511 u32 flags)
1512 {
1513 struct fwnode_handle *phy_fwnode;
1514 struct phy_device *phy_dev;
1515 int ret;
1516
1517 /* Fixed links and 802.3z are handled without needing a PHY */
1518 if (pl->cfg_link_an_mode == MLO_AN_FIXED ||
1519 (pl->cfg_link_an_mode == MLO_AN_INBAND &&
1520 phy_interface_mode_is_8023z(pl->link_interface)))
1521 return 0;
1522
1523 phy_fwnode = fwnode_get_phy_node(fwnode);
1524 if (IS_ERR(phy_fwnode)) {
1525 if (pl->cfg_link_an_mode == MLO_AN_PHY)
1526 return -ENODEV;
1527 return 0;
1528 }
1529
1530 phy_dev = fwnode_phy_find_device(phy_fwnode);
1531 /* We're done with the phy_node handle */
1532 fwnode_handle_put(phy_fwnode);
1533 if (!phy_dev)
1534 return -ENODEV;
1535
1536 /* Use PHY device/driver interface */
1537 if (pl->link_interface == PHY_INTERFACE_MODE_NA) {
1538 pl->link_interface = phy_dev->interface;
1539 pl->link_config.interface = pl->link_interface;
1540 }
1541
1542 ret = phy_attach_direct(pl->netdev, phy_dev, flags,
1543 pl->link_interface);
1544 if (ret) {
1545 phy_device_free(phy_dev);
1546 return ret;
1547 }
1548
1549 ret = phylink_bringup_phy(pl, phy_dev, pl->link_config.interface);
1550 if (ret)
1551 phy_detach(phy_dev);
1552
1553 return ret;
1554 }
1555 EXPORT_SYMBOL_GPL(phylink_fwnode_phy_connect);
1556
1557 /**
1558 * phylink_disconnect_phy() - disconnect any PHY attached to the phylink
1559 * instance.
1560 * @pl: a pointer to a &struct phylink returned from phylink_create()
1561 *
1562 * Disconnect any current PHY from the phylink instance described by @pl.
1563 */
phylink_disconnect_phy(struct phylink * pl)1564 void phylink_disconnect_phy(struct phylink *pl)
1565 {
1566 struct phy_device *phy;
1567
1568 ASSERT_RTNL();
1569
1570 phy = pl->phydev;
1571 if (phy) {
1572 mutex_lock(&phy->lock);
1573 mutex_lock(&pl->state_mutex);
1574 pl->phydev = NULL;
1575 mutex_unlock(&pl->state_mutex);
1576 mutex_unlock(&phy->lock);
1577 flush_work(&pl->resolve);
1578
1579 phy_disconnect(phy);
1580 }
1581 }
1582 EXPORT_SYMBOL_GPL(phylink_disconnect_phy);
1583
1584 /**
1585 * phylink_mac_change() - notify phylink of a change in MAC state
1586 * @pl: a pointer to a &struct phylink returned from phylink_create()
1587 * @up: indicates whether the link is currently up.
1588 *
1589 * The MAC driver should call this driver when the state of its link
1590 * changes (eg, link failure, new negotiation results, etc.)
1591 */
phylink_mac_change(struct phylink * pl,bool up)1592 void phylink_mac_change(struct phylink *pl, bool up)
1593 {
1594 if (!up)
1595 pl->mac_link_dropped = true;
1596 phylink_run_resolve(pl);
1597 phylink_dbg(pl, "mac link %s\n", up ? "up" : "down");
1598 }
1599 EXPORT_SYMBOL_GPL(phylink_mac_change);
1600
phylink_link_handler(int irq,void * data)1601 static irqreturn_t phylink_link_handler(int irq, void *data)
1602 {
1603 struct phylink *pl = data;
1604
1605 phylink_run_resolve(pl);
1606
1607 return IRQ_HANDLED;
1608 }
1609
1610 /**
1611 * phylink_start() - start a phylink instance
1612 * @pl: a pointer to a &struct phylink returned from phylink_create()
1613 *
1614 * Start the phylink instance specified by @pl, configuring the MAC for the
1615 * desired link mode(s) and negotiation style. This should be called from the
1616 * network device driver's &struct net_device_ops ndo_open() method.
1617 */
phylink_start(struct phylink * pl)1618 void phylink_start(struct phylink *pl)
1619 {
1620 bool poll = false;
1621
1622 ASSERT_RTNL();
1623
1624 phylink_info(pl, "configuring for %s/%s link mode\n",
1625 phylink_an_mode_str(pl->cur_link_an_mode),
1626 phy_modes(pl->link_config.interface));
1627
1628 /* Always set the carrier off */
1629 if (pl->netdev)
1630 netif_carrier_off(pl->netdev);
1631
1632 /* Apply the link configuration to the MAC when starting. This allows
1633 * a fixed-link to start with the correct parameters, and also
1634 * ensures that we set the appropriate advertisement for Serdes links.
1635 *
1636 * Restart autonegotiation if using 802.3z to ensure that the link
1637 * parameters are properly negotiated. This is necessary for DSA
1638 * switches using 802.3z negotiation to ensure they see our modes.
1639 */
1640 phylink_mac_initial_config(pl, true);
1641
1642 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_STOPPED);
1643
1644 if (pl->cfg_link_an_mode == MLO_AN_FIXED && pl->link_gpio) {
1645 int irq = gpiod_to_irq(pl->link_gpio);
1646
1647 if (irq > 0) {
1648 if (!request_irq(irq, phylink_link_handler,
1649 IRQF_TRIGGER_RISING |
1650 IRQF_TRIGGER_FALLING,
1651 "netdev link", pl))
1652 pl->link_irq = irq;
1653 else
1654 irq = 0;
1655 }
1656 if (irq <= 0)
1657 poll = true;
1658 }
1659
1660 switch (pl->cfg_link_an_mode) {
1661 case MLO_AN_FIXED:
1662 poll |= pl->config->poll_fixed_state;
1663 break;
1664 case MLO_AN_INBAND:
1665 if (pl->pcs)
1666 poll |= pl->pcs->poll;
1667 break;
1668 }
1669 if (poll)
1670 mod_timer(&pl->link_poll, jiffies + HZ);
1671 if (pl->phydev)
1672 phy_start(pl->phydev);
1673 if (pl->sfp_bus)
1674 sfp_upstream_start(pl->sfp_bus);
1675 }
1676 EXPORT_SYMBOL_GPL(phylink_start);
1677
1678 /**
1679 * phylink_stop() - stop a phylink instance
1680 * @pl: a pointer to a &struct phylink returned from phylink_create()
1681 *
1682 * Stop the phylink instance specified by @pl. This should be called from the
1683 * network device driver's &struct net_device_ops ndo_stop() method. The
1684 * network device's carrier state should not be changed prior to calling this
1685 * function.
1686 *
1687 * This will synchronously bring down the link if the link is not already
1688 * down (in other words, it will trigger a mac_link_down() method call.)
1689 */
phylink_stop(struct phylink * pl)1690 void phylink_stop(struct phylink *pl)
1691 {
1692 ASSERT_RTNL();
1693
1694 if (pl->sfp_bus)
1695 sfp_upstream_stop(pl->sfp_bus);
1696 if (pl->phydev)
1697 phy_stop(pl->phydev);
1698 del_timer_sync(&pl->link_poll);
1699 if (pl->link_irq) {
1700 free_irq(pl->link_irq, pl);
1701 pl->link_irq = 0;
1702 }
1703
1704 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_STOPPED);
1705 }
1706 EXPORT_SYMBOL_GPL(phylink_stop);
1707
1708 /**
1709 * phylink_suspend() - handle a network device suspend event
1710 * @pl: a pointer to a &struct phylink returned from phylink_create()
1711 * @mac_wol: true if the MAC needs to receive packets for Wake-on-Lan
1712 *
1713 * Handle a network device suspend event. There are several cases:
1714 *
1715 * - If Wake-on-Lan is not active, we can bring down the link between
1716 * the MAC and PHY by calling phylink_stop().
1717 * - If Wake-on-Lan is active, and being handled only by the PHY, we
1718 * can also bring down the link between the MAC and PHY.
1719 * - If Wake-on-Lan is active, but being handled by the MAC, the MAC
1720 * still needs to receive packets, so we can not bring the link down.
1721 */
phylink_suspend(struct phylink * pl,bool mac_wol)1722 void phylink_suspend(struct phylink *pl, bool mac_wol)
1723 {
1724 ASSERT_RTNL();
1725
1726 if (mac_wol && (!pl->netdev || pl->netdev->wol_enabled)) {
1727 /* Wake-on-Lan enabled, MAC handling */
1728 mutex_lock(&pl->state_mutex);
1729
1730 /* Stop the resolver bringing the link up */
1731 __set_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state);
1732
1733 /* Disable the carrier, to prevent transmit timeouts,
1734 * but one would hope all packets have been sent. This
1735 * also means phylink_resolve() will do nothing.
1736 */
1737 if (pl->netdev)
1738 netif_carrier_off(pl->netdev);
1739 else
1740 pl->old_link_state = false;
1741
1742 /* We do not call mac_link_down() here as we want the
1743 * link to remain up to receive the WoL packets.
1744 */
1745 mutex_unlock(&pl->state_mutex);
1746 } else {
1747 phylink_stop(pl);
1748 }
1749 }
1750 EXPORT_SYMBOL_GPL(phylink_suspend);
1751
1752 /**
1753 * phylink_resume() - handle a network device resume event
1754 * @pl: a pointer to a &struct phylink returned from phylink_create()
1755 *
1756 * Undo the effects of phylink_suspend(), returning the link to an
1757 * operational state.
1758 */
phylink_resume(struct phylink * pl)1759 void phylink_resume(struct phylink *pl)
1760 {
1761 ASSERT_RTNL();
1762
1763 if (test_bit(PHYLINK_DISABLE_MAC_WOL, &pl->phylink_disable_state)) {
1764 /* Wake-on-Lan enabled, MAC handling */
1765
1766 /* Call mac_link_down() so we keep the overall state balanced.
1767 * Do this under the state_mutex lock for consistency. This
1768 * will cause a "Link Down" message to be printed during
1769 * resume, which is harmless - the true link state will be
1770 * printed when we run a resolve.
1771 */
1772 mutex_lock(&pl->state_mutex);
1773 phylink_link_down(pl);
1774 mutex_unlock(&pl->state_mutex);
1775
1776 /* Re-apply the link parameters so that all the settings get
1777 * restored to the MAC.
1778 */
1779 phylink_mac_initial_config(pl, true);
1780
1781 /* Re-enable and re-resolve the link parameters */
1782 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_MAC_WOL);
1783 } else {
1784 phylink_start(pl);
1785 }
1786 }
1787 EXPORT_SYMBOL_GPL(phylink_resume);
1788
1789 /**
1790 * phylink_ethtool_get_wol() - get the wake on lan parameters for the PHY
1791 * @pl: a pointer to a &struct phylink returned from phylink_create()
1792 * @wol: a pointer to &struct ethtool_wolinfo to hold the read parameters
1793 *
1794 * Read the wake on lan parameters from the PHY attached to the phylink
1795 * instance specified by @pl. If no PHY is currently attached, report no
1796 * support for wake on lan.
1797 */
phylink_ethtool_get_wol(struct phylink * pl,struct ethtool_wolinfo * wol)1798 void phylink_ethtool_get_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
1799 {
1800 ASSERT_RTNL();
1801
1802 wol->supported = 0;
1803 wol->wolopts = 0;
1804
1805 if (pl->phydev)
1806 phy_ethtool_get_wol(pl->phydev, wol);
1807 }
1808 EXPORT_SYMBOL_GPL(phylink_ethtool_get_wol);
1809
1810 /**
1811 * phylink_ethtool_set_wol() - set wake on lan parameters
1812 * @pl: a pointer to a &struct phylink returned from phylink_create()
1813 * @wol: a pointer to &struct ethtool_wolinfo for the desired parameters
1814 *
1815 * Set the wake on lan parameters for the PHY attached to the phylink
1816 * instance specified by @pl. If no PHY is attached, returns %EOPNOTSUPP
1817 * error.
1818 *
1819 * Returns zero on success or negative errno code.
1820 */
phylink_ethtool_set_wol(struct phylink * pl,struct ethtool_wolinfo * wol)1821 int phylink_ethtool_set_wol(struct phylink *pl, struct ethtool_wolinfo *wol)
1822 {
1823 int ret = -EOPNOTSUPP;
1824
1825 ASSERT_RTNL();
1826
1827 if (pl->phydev)
1828 ret = phy_ethtool_set_wol(pl->phydev, wol);
1829
1830 return ret;
1831 }
1832 EXPORT_SYMBOL_GPL(phylink_ethtool_set_wol);
1833
phylink_merge_link_mode(unsigned long * dst,const unsigned long * b)1834 static void phylink_merge_link_mode(unsigned long *dst, const unsigned long *b)
1835 {
1836 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask);
1837
1838 linkmode_zero(mask);
1839 phylink_set_port_modes(mask);
1840
1841 linkmode_and(dst, dst, mask);
1842 linkmode_or(dst, dst, b);
1843 }
1844
phylink_get_ksettings(const struct phylink_link_state * state,struct ethtool_link_ksettings * kset)1845 static void phylink_get_ksettings(const struct phylink_link_state *state,
1846 struct ethtool_link_ksettings *kset)
1847 {
1848 phylink_merge_link_mode(kset->link_modes.advertising, state->advertising);
1849 linkmode_copy(kset->link_modes.lp_advertising, state->lp_advertising);
1850 kset->base.speed = state->speed;
1851 kset->base.duplex = state->duplex;
1852 kset->base.autoneg = state->an_enabled ? AUTONEG_ENABLE :
1853 AUTONEG_DISABLE;
1854 }
1855
1856 /**
1857 * phylink_ethtool_ksettings_get() - get the current link settings
1858 * @pl: a pointer to a &struct phylink returned from phylink_create()
1859 * @kset: a pointer to a &struct ethtool_link_ksettings to hold link settings
1860 *
1861 * Read the current link settings for the phylink instance specified by @pl.
1862 * This will be the link settings read from the MAC, PHY or fixed link
1863 * settings depending on the current negotiation mode.
1864 */
phylink_ethtool_ksettings_get(struct phylink * pl,struct ethtool_link_ksettings * kset)1865 int phylink_ethtool_ksettings_get(struct phylink *pl,
1866 struct ethtool_link_ksettings *kset)
1867 {
1868 struct phylink_link_state link_state;
1869
1870 ASSERT_RTNL();
1871
1872 if (pl->phydev)
1873 phy_ethtool_ksettings_get(pl->phydev, kset);
1874 else
1875 kset->base.port = pl->link_port;
1876
1877 linkmode_copy(kset->link_modes.supported, pl->supported);
1878
1879 switch (pl->cur_link_an_mode) {
1880 case MLO_AN_FIXED:
1881 /* We are using fixed settings. Report these as the
1882 * current link settings - and note that these also
1883 * represent the supported speeds/duplex/pause modes.
1884 */
1885 phylink_get_fixed_state(pl, &link_state);
1886 phylink_get_ksettings(&link_state, kset);
1887 break;
1888
1889 case MLO_AN_INBAND:
1890 /* If there is a phy attached, then use the reported
1891 * settings from the phy with no modification.
1892 */
1893 if (pl->phydev)
1894 break;
1895
1896 phylink_mac_pcs_get_state(pl, &link_state);
1897
1898 /* The MAC is reporting the link results from its own PCS
1899 * layer via in-band status. Report these as the current
1900 * link settings.
1901 */
1902 phylink_get_ksettings(&link_state, kset);
1903 break;
1904 }
1905
1906 return 0;
1907 }
1908 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_get);
1909
1910 /**
1911 * phylink_ethtool_ksettings_set() - set the link settings
1912 * @pl: a pointer to a &struct phylink returned from phylink_create()
1913 * @kset: a pointer to a &struct ethtool_link_ksettings for the desired modes
1914 */
phylink_ethtool_ksettings_set(struct phylink * pl,const struct ethtool_link_ksettings * kset)1915 int phylink_ethtool_ksettings_set(struct phylink *pl,
1916 const struct ethtool_link_ksettings *kset)
1917 {
1918 __ETHTOOL_DECLARE_LINK_MODE_MASK(support);
1919 struct phylink_link_state config;
1920 const struct phy_setting *s;
1921
1922 ASSERT_RTNL();
1923
1924 if (pl->phydev) {
1925 /* We can rely on phylib for this update; we also do not need
1926 * to update the pl->link_config settings:
1927 * - the configuration returned via ksettings_get() will come
1928 * from phylib whenever a PHY is present.
1929 * - link_config.interface will be updated by the PHY calling
1930 * back via phylink_phy_change() and a subsequent resolve.
1931 * - initial link configuration for PHY mode comes from the
1932 * last phy state updated via phylink_phy_change().
1933 * - other configuration changes (e.g. pause modes) are
1934 * performed directly via phylib.
1935 * - if in in-band mode with a PHY, the link configuration
1936 * is passed on the link from the PHY, and all of
1937 * link_config.{speed,duplex,an_enabled,pause} are not used.
1938 * - the only possible use would be link_config.advertising
1939 * pause modes when in 1000base-X mode with a PHY, but in
1940 * the presence of a PHY, this should not be changed as that
1941 * should be determined from the media side advertisement.
1942 */
1943 return phy_ethtool_ksettings_set(pl->phydev, kset);
1944 }
1945
1946 config = pl->link_config;
1947
1948 /* Mask out unsupported advertisements */
1949 linkmode_and(config.advertising, kset->link_modes.advertising,
1950 pl->supported);
1951
1952 /* FIXME: should we reject autoneg if phy/mac does not support it? */
1953 switch (kset->base.autoneg) {
1954 case AUTONEG_DISABLE:
1955 /* Autonegotiation disabled, select a suitable speed and
1956 * duplex.
1957 */
1958 s = phy_lookup_setting(kset->base.speed, kset->base.duplex,
1959 pl->supported, false);
1960 if (!s)
1961 return -EINVAL;
1962
1963 /* If we have a fixed link, refuse to change link parameters.
1964 * If the link parameters match, accept them but do nothing.
1965 */
1966 if (pl->cur_link_an_mode == MLO_AN_FIXED) {
1967 if (s->speed != pl->link_config.speed ||
1968 s->duplex != pl->link_config.duplex)
1969 return -EINVAL;
1970 return 0;
1971 }
1972
1973 config.speed = s->speed;
1974 config.duplex = s->duplex;
1975 break;
1976
1977 case AUTONEG_ENABLE:
1978 /* If we have a fixed link, allow autonegotiation (since that
1979 * is our default case) but do not allow the advertisement to
1980 * be changed. If the advertisement matches, simply return.
1981 */
1982 if (pl->cur_link_an_mode == MLO_AN_FIXED) {
1983 if (!linkmode_equal(config.advertising,
1984 pl->link_config.advertising))
1985 return -EINVAL;
1986 return 0;
1987 }
1988
1989 config.speed = SPEED_UNKNOWN;
1990 config.duplex = DUPLEX_UNKNOWN;
1991 break;
1992
1993 default:
1994 return -EINVAL;
1995 }
1996
1997 /* We have ruled out the case with a PHY attached, and the
1998 * fixed-link cases. All that is left are in-band links.
1999 */
2000 config.an_enabled = kset->base.autoneg == AUTONEG_ENABLE;
2001 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, config.advertising,
2002 config.an_enabled);
2003
2004 /* If this link is with an SFP, ensure that changes to advertised modes
2005 * also cause the associated interface to be selected such that the
2006 * link can be configured correctly.
2007 */
2008 if (pl->sfp_bus) {
2009 config.interface = sfp_select_interface(pl->sfp_bus,
2010 config.advertising);
2011 if (config.interface == PHY_INTERFACE_MODE_NA) {
2012 phylink_err(pl,
2013 "selection of interface failed, advertisement %*pb\n",
2014 __ETHTOOL_LINK_MODE_MASK_NBITS,
2015 config.advertising);
2016 return -EINVAL;
2017 }
2018
2019 /* Revalidate with the selected interface */
2020 linkmode_copy(support, pl->supported);
2021 if (phylink_validate(pl, support, &config)) {
2022 phylink_err(pl, "validation of %s/%s with support %*pb failed\n",
2023 phylink_an_mode_str(pl->cur_link_an_mode),
2024 phy_modes(config.interface),
2025 __ETHTOOL_LINK_MODE_MASK_NBITS, support);
2026 return -EINVAL;
2027 }
2028 } else {
2029 /* Validate without changing the current supported mask. */
2030 linkmode_copy(support, pl->supported);
2031 if (phylink_validate(pl, support, &config))
2032 return -EINVAL;
2033 }
2034
2035 /* If autonegotiation is enabled, we must have an advertisement */
2036 if (config.an_enabled && phylink_is_empty_linkmode(config.advertising))
2037 return -EINVAL;
2038
2039 mutex_lock(&pl->state_mutex);
2040 pl->link_config.speed = config.speed;
2041 pl->link_config.duplex = config.duplex;
2042 pl->link_config.an_enabled = config.an_enabled;
2043
2044 if (pl->link_config.interface != config.interface) {
2045 /* The interface changed, e.g. 1000base-X <-> 2500base-X */
2046 /* We need to force the link down, then change the interface */
2047 if (pl->old_link_state) {
2048 phylink_link_down(pl);
2049 pl->old_link_state = false;
2050 }
2051 if (!test_bit(PHYLINK_DISABLE_STOPPED,
2052 &pl->phylink_disable_state))
2053 phylink_major_config(pl, false, &config);
2054 pl->link_config.interface = config.interface;
2055 linkmode_copy(pl->link_config.advertising, config.advertising);
2056 } else if (!linkmode_equal(pl->link_config.advertising,
2057 config.advertising)) {
2058 linkmode_copy(pl->link_config.advertising, config.advertising);
2059 phylink_change_inband_advert(pl);
2060 }
2061 mutex_unlock(&pl->state_mutex);
2062
2063 return 0;
2064 }
2065 EXPORT_SYMBOL_GPL(phylink_ethtool_ksettings_set);
2066
2067 /**
2068 * phylink_ethtool_nway_reset() - restart negotiation
2069 * @pl: a pointer to a &struct phylink returned from phylink_create()
2070 *
2071 * Restart negotiation for the phylink instance specified by @pl. This will
2072 * cause any attached phy to restart negotiation with the link partner, and
2073 * if the MAC is in a BaseX mode, the MAC will also be requested to restart
2074 * negotiation.
2075 *
2076 * Returns zero on success, or negative error code.
2077 */
phylink_ethtool_nway_reset(struct phylink * pl)2078 int phylink_ethtool_nway_reset(struct phylink *pl)
2079 {
2080 int ret = 0;
2081
2082 ASSERT_RTNL();
2083
2084 if (pl->phydev)
2085 ret = phy_restart_aneg(pl->phydev);
2086 phylink_mac_pcs_an_restart(pl);
2087
2088 return ret;
2089 }
2090 EXPORT_SYMBOL_GPL(phylink_ethtool_nway_reset);
2091
2092 /**
2093 * phylink_ethtool_get_pauseparam() - get the current pause parameters
2094 * @pl: a pointer to a &struct phylink returned from phylink_create()
2095 * @pause: a pointer to a &struct ethtool_pauseparam
2096 */
phylink_ethtool_get_pauseparam(struct phylink * pl,struct ethtool_pauseparam * pause)2097 void phylink_ethtool_get_pauseparam(struct phylink *pl,
2098 struct ethtool_pauseparam *pause)
2099 {
2100 ASSERT_RTNL();
2101
2102 pause->autoneg = !!(pl->link_config.pause & MLO_PAUSE_AN);
2103 pause->rx_pause = !!(pl->link_config.pause & MLO_PAUSE_RX);
2104 pause->tx_pause = !!(pl->link_config.pause & MLO_PAUSE_TX);
2105 }
2106 EXPORT_SYMBOL_GPL(phylink_ethtool_get_pauseparam);
2107
2108 /**
2109 * phylink_ethtool_set_pauseparam() - set the current pause parameters
2110 * @pl: a pointer to a &struct phylink returned from phylink_create()
2111 * @pause: a pointer to a &struct ethtool_pauseparam
2112 */
phylink_ethtool_set_pauseparam(struct phylink * pl,struct ethtool_pauseparam * pause)2113 int phylink_ethtool_set_pauseparam(struct phylink *pl,
2114 struct ethtool_pauseparam *pause)
2115 {
2116 struct phylink_link_state *config = &pl->link_config;
2117 bool manual_changed;
2118 int pause_state;
2119
2120 ASSERT_RTNL();
2121
2122 if (pl->cur_link_an_mode == MLO_AN_FIXED)
2123 return -EOPNOTSUPP;
2124
2125 if (!phylink_test(pl->supported, Pause) &&
2126 !phylink_test(pl->supported, Asym_Pause))
2127 return -EOPNOTSUPP;
2128
2129 if (!phylink_test(pl->supported, Asym_Pause) &&
2130 pause->rx_pause != pause->tx_pause)
2131 return -EINVAL;
2132
2133 pause_state = 0;
2134 if (pause->autoneg)
2135 pause_state |= MLO_PAUSE_AN;
2136 if (pause->rx_pause)
2137 pause_state |= MLO_PAUSE_RX;
2138 if (pause->tx_pause)
2139 pause_state |= MLO_PAUSE_TX;
2140
2141 mutex_lock(&pl->state_mutex);
2142 /*
2143 * See the comments for linkmode_set_pause(), wrt the deficiencies
2144 * with the current implementation. A solution to this issue would
2145 * be:
2146 * ethtool Local device
2147 * rx tx Pause AsymDir
2148 * 0 0 0 0
2149 * 1 0 1 1
2150 * 0 1 0 1
2151 * 1 1 1 1
2152 * and then use the ethtool rx/tx enablement status to mask the
2153 * rx/tx pause resolution.
2154 */
2155 linkmode_set_pause(config->advertising, pause->tx_pause,
2156 pause->rx_pause);
2157
2158 manual_changed = (config->pause ^ pause_state) & MLO_PAUSE_AN ||
2159 (!(pause_state & MLO_PAUSE_AN) &&
2160 (config->pause ^ pause_state) & MLO_PAUSE_TXRX_MASK);
2161
2162 config->pause = pause_state;
2163
2164 /* Update our in-band advertisement, triggering a renegotiation if
2165 * the advertisement changed.
2166 */
2167 if (!pl->phydev)
2168 phylink_change_inband_advert(pl);
2169
2170 mutex_unlock(&pl->state_mutex);
2171
2172 /* If we have a PHY, a change of the pause frame advertisement will
2173 * cause phylib to renegotiate (if AN is enabled) which will in turn
2174 * call our phylink_phy_change() and trigger a resolve. Note that
2175 * we can't hold our state mutex while calling phy_set_asym_pause().
2176 */
2177 if (pl->phydev)
2178 phy_set_asym_pause(pl->phydev, pause->rx_pause,
2179 pause->tx_pause);
2180
2181 /* If the manual pause settings changed, make sure we trigger a
2182 * resolve to update their state; we can not guarantee that the
2183 * link will cycle.
2184 */
2185 if (manual_changed) {
2186 pl->mac_link_dropped = true;
2187 phylink_run_resolve(pl);
2188 }
2189
2190 return 0;
2191 }
2192 EXPORT_SYMBOL_GPL(phylink_ethtool_set_pauseparam);
2193
2194 /**
2195 * phylink_get_eee_err() - read the energy efficient ethernet error
2196 * counter
2197 * @pl: a pointer to a &struct phylink returned from phylink_create().
2198 *
2199 * Read the Energy Efficient Ethernet error counter from the PHY associated
2200 * with the phylink instance specified by @pl.
2201 *
2202 * Returns positive error counter value, or negative error code.
2203 */
phylink_get_eee_err(struct phylink * pl)2204 int phylink_get_eee_err(struct phylink *pl)
2205 {
2206 int ret = 0;
2207
2208 ASSERT_RTNL();
2209
2210 if (pl->phydev)
2211 ret = phy_get_eee_err(pl->phydev);
2212
2213 return ret;
2214 }
2215 EXPORT_SYMBOL_GPL(phylink_get_eee_err);
2216
2217 /**
2218 * phylink_init_eee() - init and check the EEE features
2219 * @pl: a pointer to a &struct phylink returned from phylink_create()
2220 * @clk_stop_enable: allow PHY to stop receive clock
2221 *
2222 * Must be called either with RTNL held or within mac_link_up()
2223 */
phylink_init_eee(struct phylink * pl,bool clk_stop_enable)2224 int phylink_init_eee(struct phylink *pl, bool clk_stop_enable)
2225 {
2226 int ret = -EOPNOTSUPP;
2227
2228 if (pl->phydev)
2229 ret = phy_init_eee(pl->phydev, clk_stop_enable);
2230
2231 return ret;
2232 }
2233 EXPORT_SYMBOL_GPL(phylink_init_eee);
2234
2235 /**
2236 * phylink_ethtool_get_eee() - read the energy efficient ethernet parameters
2237 * @pl: a pointer to a &struct phylink returned from phylink_create()
2238 * @eee: a pointer to a &struct ethtool_eee for the read parameters
2239 */
phylink_ethtool_get_eee(struct phylink * pl,struct ethtool_eee * eee)2240 int phylink_ethtool_get_eee(struct phylink *pl, struct ethtool_eee *eee)
2241 {
2242 int ret = -EOPNOTSUPP;
2243
2244 ASSERT_RTNL();
2245
2246 if (pl->phydev)
2247 ret = phy_ethtool_get_eee(pl->phydev, eee);
2248
2249 return ret;
2250 }
2251 EXPORT_SYMBOL_GPL(phylink_ethtool_get_eee);
2252
2253 /**
2254 * phylink_ethtool_set_eee() - set the energy efficient ethernet parameters
2255 * @pl: a pointer to a &struct phylink returned from phylink_create()
2256 * @eee: a pointer to a &struct ethtool_eee for the desired parameters
2257 */
phylink_ethtool_set_eee(struct phylink * pl,struct ethtool_eee * eee)2258 int phylink_ethtool_set_eee(struct phylink *pl, struct ethtool_eee *eee)
2259 {
2260 int ret = -EOPNOTSUPP;
2261
2262 ASSERT_RTNL();
2263
2264 if (pl->phydev)
2265 ret = phy_ethtool_set_eee(pl->phydev, eee);
2266
2267 return ret;
2268 }
2269 EXPORT_SYMBOL_GPL(phylink_ethtool_set_eee);
2270
2271 /* This emulates MII registers for a fixed-mode phy operating as per the
2272 * passed in state. "aneg" defines if we report negotiation is possible.
2273 *
2274 * FIXME: should deal with negotiation state too.
2275 */
phylink_mii_emul_read(unsigned int reg,struct phylink_link_state * state)2276 static int phylink_mii_emul_read(unsigned int reg,
2277 struct phylink_link_state *state)
2278 {
2279 struct fixed_phy_status fs;
2280 unsigned long *lpa = state->lp_advertising;
2281 int val;
2282
2283 fs.link = state->link;
2284 fs.speed = state->speed;
2285 fs.duplex = state->duplex;
2286 fs.pause = test_bit(ETHTOOL_LINK_MODE_Pause_BIT, lpa);
2287 fs.asym_pause = test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, lpa);
2288
2289 val = swphy_read_reg(reg, &fs);
2290 if (reg == MII_BMSR) {
2291 if (!state->an_complete)
2292 val &= ~BMSR_ANEGCOMPLETE;
2293 }
2294 return val;
2295 }
2296
phylink_phy_read(struct phylink * pl,unsigned int phy_id,unsigned int reg)2297 static int phylink_phy_read(struct phylink *pl, unsigned int phy_id,
2298 unsigned int reg)
2299 {
2300 struct phy_device *phydev = pl->phydev;
2301 int prtad, devad;
2302
2303 if (mdio_phy_id_is_c45(phy_id)) {
2304 prtad = mdio_phy_id_prtad(phy_id);
2305 devad = mdio_phy_id_devad(phy_id);
2306 return mdiobus_c45_read(pl->phydev->mdio.bus, prtad, devad,
2307 reg);
2308 }
2309
2310 if (phydev->is_c45) {
2311 switch (reg) {
2312 case MII_BMCR:
2313 case MII_BMSR:
2314 case MII_PHYSID1:
2315 case MII_PHYSID2:
2316 devad = __ffs(phydev->c45_ids.mmds_present);
2317 break;
2318 case MII_ADVERTISE:
2319 case MII_LPA:
2320 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN))
2321 return -EINVAL;
2322 devad = MDIO_MMD_AN;
2323 if (reg == MII_ADVERTISE)
2324 reg = MDIO_AN_ADVERTISE;
2325 else
2326 reg = MDIO_AN_LPA;
2327 break;
2328 default:
2329 return -EINVAL;
2330 }
2331 prtad = phy_id;
2332 return mdiobus_c45_read(pl->phydev->mdio.bus, prtad, devad,
2333 reg);
2334 }
2335
2336 return mdiobus_read(pl->phydev->mdio.bus, phy_id, reg);
2337 }
2338
phylink_phy_write(struct phylink * pl,unsigned int phy_id,unsigned int reg,unsigned int val)2339 static int phylink_phy_write(struct phylink *pl, unsigned int phy_id,
2340 unsigned int reg, unsigned int val)
2341 {
2342 struct phy_device *phydev = pl->phydev;
2343 int prtad, devad;
2344
2345 if (mdio_phy_id_is_c45(phy_id)) {
2346 prtad = mdio_phy_id_prtad(phy_id);
2347 devad = mdio_phy_id_devad(phy_id);
2348 return mdiobus_c45_write(pl->phydev->mdio.bus, prtad, devad,
2349 reg, val);
2350 }
2351
2352 if (phydev->is_c45) {
2353 switch (reg) {
2354 case MII_BMCR:
2355 case MII_BMSR:
2356 case MII_PHYSID1:
2357 case MII_PHYSID2:
2358 devad = __ffs(phydev->c45_ids.mmds_present);
2359 break;
2360 case MII_ADVERTISE:
2361 case MII_LPA:
2362 if (!(phydev->c45_ids.mmds_present & MDIO_DEVS_AN))
2363 return -EINVAL;
2364 devad = MDIO_MMD_AN;
2365 if (reg == MII_ADVERTISE)
2366 reg = MDIO_AN_ADVERTISE;
2367 else
2368 reg = MDIO_AN_LPA;
2369 break;
2370 default:
2371 return -EINVAL;
2372 }
2373 return mdiobus_c45_write(pl->phydev->mdio.bus, phy_id, devad,
2374 reg, val);
2375 }
2376
2377 return mdiobus_write(phydev->mdio.bus, phy_id, reg, val);
2378 }
2379
phylink_mii_read(struct phylink * pl,unsigned int phy_id,unsigned int reg)2380 static int phylink_mii_read(struct phylink *pl, unsigned int phy_id,
2381 unsigned int reg)
2382 {
2383 struct phylink_link_state state;
2384 int val = 0xffff;
2385
2386 switch (pl->cur_link_an_mode) {
2387 case MLO_AN_FIXED:
2388 if (phy_id == 0) {
2389 phylink_get_fixed_state(pl, &state);
2390 val = phylink_mii_emul_read(reg, &state);
2391 }
2392 break;
2393
2394 case MLO_AN_PHY:
2395 return -EOPNOTSUPP;
2396
2397 case MLO_AN_INBAND:
2398 if (phy_id == 0) {
2399 phylink_mac_pcs_get_state(pl, &state);
2400 val = phylink_mii_emul_read(reg, &state);
2401 }
2402 break;
2403 }
2404
2405 return val & 0xffff;
2406 }
2407
phylink_mii_write(struct phylink * pl,unsigned int phy_id,unsigned int reg,unsigned int val)2408 static int phylink_mii_write(struct phylink *pl, unsigned int phy_id,
2409 unsigned int reg, unsigned int val)
2410 {
2411 switch (pl->cur_link_an_mode) {
2412 case MLO_AN_FIXED:
2413 break;
2414
2415 case MLO_AN_PHY:
2416 return -EOPNOTSUPP;
2417
2418 case MLO_AN_INBAND:
2419 break;
2420 }
2421
2422 return 0;
2423 }
2424
2425 /**
2426 * phylink_mii_ioctl() - generic mii ioctl interface
2427 * @pl: a pointer to a &struct phylink returned from phylink_create()
2428 * @ifr: a pointer to a &struct ifreq for socket ioctls
2429 * @cmd: ioctl cmd to execute
2430 *
2431 * Perform the specified MII ioctl on the PHY attached to the phylink instance
2432 * specified by @pl. If no PHY is attached, emulate the presence of the PHY.
2433 *
2434 * Returns: zero on success or negative error code.
2435 *
2436 * %SIOCGMIIPHY:
2437 * read register from the current PHY.
2438 * %SIOCGMIIREG:
2439 * read register from the specified PHY.
2440 * %SIOCSMIIREG:
2441 * set a register on the specified PHY.
2442 */
phylink_mii_ioctl(struct phylink * pl,struct ifreq * ifr,int cmd)2443 int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd)
2444 {
2445 struct mii_ioctl_data *mii = if_mii(ifr);
2446 int ret;
2447
2448 ASSERT_RTNL();
2449
2450 if (pl->phydev) {
2451 /* PHYs only exist for MLO_AN_PHY and SGMII */
2452 switch (cmd) {
2453 case SIOCGMIIPHY:
2454 mii->phy_id = pl->phydev->mdio.addr;
2455 fallthrough;
2456
2457 case SIOCGMIIREG:
2458 ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num);
2459 if (ret >= 0) {
2460 mii->val_out = ret;
2461 ret = 0;
2462 }
2463 break;
2464
2465 case SIOCSMIIREG:
2466 ret = phylink_phy_write(pl, mii->phy_id, mii->reg_num,
2467 mii->val_in);
2468 break;
2469
2470 default:
2471 ret = phy_mii_ioctl(pl->phydev, ifr, cmd);
2472 break;
2473 }
2474 } else {
2475 switch (cmd) {
2476 case SIOCGMIIPHY:
2477 mii->phy_id = 0;
2478 fallthrough;
2479
2480 case SIOCGMIIREG:
2481 ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num);
2482 if (ret >= 0) {
2483 mii->val_out = ret;
2484 ret = 0;
2485 }
2486 break;
2487
2488 case SIOCSMIIREG:
2489 ret = phylink_mii_write(pl, mii->phy_id, mii->reg_num,
2490 mii->val_in);
2491 break;
2492
2493 default:
2494 ret = -EOPNOTSUPP;
2495 break;
2496 }
2497 }
2498
2499 return ret;
2500 }
2501 EXPORT_SYMBOL_GPL(phylink_mii_ioctl);
2502
2503 /**
2504 * phylink_speed_down() - set the non-SFP PHY to lowest speed supported by both
2505 * link partners
2506 * @pl: a pointer to a &struct phylink returned from phylink_create()
2507 * @sync: perform action synchronously
2508 *
2509 * If we have a PHY that is not part of a SFP module, then set the speed
2510 * as described in the phy_speed_down() function. Please see this function
2511 * for a description of the @sync parameter.
2512 *
2513 * Returns zero if there is no PHY, otherwise as per phy_speed_down().
2514 */
phylink_speed_down(struct phylink * pl,bool sync)2515 int phylink_speed_down(struct phylink *pl, bool sync)
2516 {
2517 int ret = 0;
2518
2519 ASSERT_RTNL();
2520
2521 if (!pl->sfp_bus && pl->phydev)
2522 ret = phy_speed_down(pl->phydev, sync);
2523
2524 return ret;
2525 }
2526 EXPORT_SYMBOL_GPL(phylink_speed_down);
2527
2528 /**
2529 * phylink_speed_up() - restore the advertised speeds prior to the call to
2530 * phylink_speed_down()
2531 * @pl: a pointer to a &struct phylink returned from phylink_create()
2532 *
2533 * If we have a PHY that is not part of a SFP module, then restore the
2534 * PHY speeds as per phy_speed_up().
2535 *
2536 * Returns zero if there is no PHY, otherwise as per phy_speed_up().
2537 */
phylink_speed_up(struct phylink * pl)2538 int phylink_speed_up(struct phylink *pl)
2539 {
2540 int ret = 0;
2541
2542 ASSERT_RTNL();
2543
2544 if (!pl->sfp_bus && pl->phydev)
2545 ret = phy_speed_up(pl->phydev);
2546
2547 return ret;
2548 }
2549 EXPORT_SYMBOL_GPL(phylink_speed_up);
2550
phylink_sfp_attach(void * upstream,struct sfp_bus * bus)2551 static void phylink_sfp_attach(void *upstream, struct sfp_bus *bus)
2552 {
2553 struct phylink *pl = upstream;
2554
2555 pl->netdev->sfp_bus = bus;
2556 }
2557
phylink_sfp_detach(void * upstream,struct sfp_bus * bus)2558 static void phylink_sfp_detach(void *upstream, struct sfp_bus *bus)
2559 {
2560 struct phylink *pl = upstream;
2561
2562 pl->netdev->sfp_bus = NULL;
2563 }
2564
phylink_sfp_config(struct phylink * pl,u8 mode,const unsigned long * supported,const unsigned long * advertising)2565 static int phylink_sfp_config(struct phylink *pl, u8 mode,
2566 const unsigned long *supported,
2567 const unsigned long *advertising)
2568 {
2569 __ETHTOOL_DECLARE_LINK_MODE_MASK(support1);
2570 __ETHTOOL_DECLARE_LINK_MODE_MASK(support);
2571 struct phylink_link_state config;
2572 phy_interface_t iface;
2573 bool changed;
2574 int ret;
2575
2576 linkmode_copy(support, supported);
2577
2578 memset(&config, 0, sizeof(config));
2579 linkmode_copy(config.advertising, advertising);
2580 config.interface = PHY_INTERFACE_MODE_NA;
2581 config.speed = SPEED_UNKNOWN;
2582 config.duplex = DUPLEX_UNKNOWN;
2583 config.pause = MLO_PAUSE_AN;
2584 config.an_enabled = pl->link_config.an_enabled;
2585
2586 /* Ignore errors if we're expecting a PHY to attach later */
2587 ret = phylink_validate(pl, support, &config);
2588 if (ret) {
2589 phylink_err(pl, "validation with support %*pb failed: %pe\n",
2590 __ETHTOOL_LINK_MODE_MASK_NBITS, support,
2591 ERR_PTR(ret));
2592 return ret;
2593 }
2594
2595 iface = sfp_select_interface(pl->sfp_bus, config.advertising);
2596 if (iface == PHY_INTERFACE_MODE_NA) {
2597 phylink_err(pl,
2598 "selection of interface failed, advertisement %*pb\n",
2599 __ETHTOOL_LINK_MODE_MASK_NBITS, config.advertising);
2600 return -EINVAL;
2601 }
2602
2603 config.interface = iface;
2604 linkmode_copy(support1, support);
2605 ret = phylink_validate(pl, support1, &config);
2606 if (ret) {
2607 phylink_err(pl,
2608 "validation of %s/%s with support %*pb failed: %pe\n",
2609 phylink_an_mode_str(mode),
2610 phy_modes(config.interface),
2611 __ETHTOOL_LINK_MODE_MASK_NBITS, support,
2612 ERR_PTR(ret));
2613 return ret;
2614 }
2615
2616 phylink_dbg(pl, "requesting link mode %s/%s with support %*pb\n",
2617 phylink_an_mode_str(mode), phy_modes(config.interface),
2618 __ETHTOOL_LINK_MODE_MASK_NBITS, support);
2619
2620 if (phy_interface_mode_is_8023z(iface) && pl->phydev)
2621 return -EINVAL;
2622
2623 changed = !linkmode_equal(pl->supported, support) ||
2624 !linkmode_equal(pl->link_config.advertising,
2625 config.advertising);
2626 if (changed) {
2627 linkmode_copy(pl->supported, support);
2628 linkmode_copy(pl->link_config.advertising, config.advertising);
2629 }
2630
2631 if (pl->cur_link_an_mode != mode ||
2632 pl->link_config.interface != config.interface) {
2633 pl->link_config.interface = config.interface;
2634 pl->cur_link_an_mode = mode;
2635
2636 changed = true;
2637
2638 phylink_info(pl, "switched to %s/%s link mode\n",
2639 phylink_an_mode_str(mode),
2640 phy_modes(config.interface));
2641 }
2642
2643 pl->link_port = pl->sfp_port;
2644
2645 if (changed && !test_bit(PHYLINK_DISABLE_STOPPED,
2646 &pl->phylink_disable_state))
2647 phylink_mac_initial_config(pl, false);
2648
2649 return ret;
2650 }
2651
phylink_sfp_module_insert(void * upstream,const struct sfp_eeprom_id * id)2652 static int phylink_sfp_module_insert(void *upstream,
2653 const struct sfp_eeprom_id *id)
2654 {
2655 struct phylink *pl = upstream;
2656 unsigned long *support = pl->sfp_support;
2657
2658 ASSERT_RTNL();
2659
2660 linkmode_zero(support);
2661 sfp_parse_support(pl->sfp_bus, id, support);
2662 pl->sfp_port = sfp_parse_port(pl->sfp_bus, id, support);
2663
2664 /* If this module may have a PHY connecting later, defer until later */
2665 pl->sfp_may_have_phy = sfp_may_have_phy(pl->sfp_bus, id);
2666 if (pl->sfp_may_have_phy)
2667 return 0;
2668
2669 return phylink_sfp_config(pl, MLO_AN_INBAND, support, support);
2670 }
2671
phylink_sfp_module_start(void * upstream)2672 static int phylink_sfp_module_start(void *upstream)
2673 {
2674 struct phylink *pl = upstream;
2675
2676 /* If this SFP module has a PHY, start the PHY now. */
2677 if (pl->phydev) {
2678 phy_start(pl->phydev);
2679 return 0;
2680 }
2681
2682 /* If the module may have a PHY but we didn't detect one we
2683 * need to configure the MAC here.
2684 */
2685 if (!pl->sfp_may_have_phy)
2686 return 0;
2687
2688 return phylink_sfp_config(pl, MLO_AN_INBAND,
2689 pl->sfp_support, pl->sfp_support);
2690 }
2691
phylink_sfp_module_stop(void * upstream)2692 static void phylink_sfp_module_stop(void *upstream)
2693 {
2694 struct phylink *pl = upstream;
2695
2696 /* If this SFP module has a PHY, stop it. */
2697 if (pl->phydev)
2698 phy_stop(pl->phydev);
2699 }
2700
phylink_sfp_link_down(void * upstream)2701 static void phylink_sfp_link_down(void *upstream)
2702 {
2703 struct phylink *pl = upstream;
2704
2705 ASSERT_RTNL();
2706
2707 phylink_run_resolve_and_disable(pl, PHYLINK_DISABLE_LINK);
2708 }
2709
phylink_sfp_link_up(void * upstream)2710 static void phylink_sfp_link_up(void *upstream)
2711 {
2712 struct phylink *pl = upstream;
2713
2714 ASSERT_RTNL();
2715
2716 phylink_enable_and_run_resolve(pl, PHYLINK_DISABLE_LINK);
2717 }
2718
2719 /* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII
2720 * or 802.3z control word, so inband will not work.
2721 */
phylink_phy_no_inband(struct phy_device * phy)2722 static bool phylink_phy_no_inband(struct phy_device *phy)
2723 {
2724 return phy->is_c45 &&
2725 (phy->c45_ids.device_ids[1] & 0xfffffff0) == 0xae025150;
2726 }
2727
phylink_sfp_connect_phy(void * upstream,struct phy_device * phy)2728 static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy)
2729 {
2730 struct phylink *pl = upstream;
2731 phy_interface_t interface;
2732 u8 mode;
2733 int ret;
2734
2735 /*
2736 * This is the new way of dealing with flow control for PHYs,
2737 * as described by Timur Tabi in commit 529ed1275263 ("net: phy:
2738 * phy drivers should not set SUPPORTED_[Asym_]Pause") except
2739 * using our validate call to the MAC, we rely upon the MAC
2740 * clearing the bits from both supported and advertising fields.
2741 */
2742 phy_support_asym_pause(phy);
2743
2744 if (phylink_phy_no_inband(phy))
2745 mode = MLO_AN_PHY;
2746 else
2747 mode = MLO_AN_INBAND;
2748
2749 /* Do the initial configuration */
2750 ret = phylink_sfp_config(pl, mode, phy->supported, phy->advertising);
2751 if (ret < 0)
2752 return ret;
2753
2754 interface = pl->link_config.interface;
2755 ret = phylink_attach_phy(pl, phy, interface);
2756 if (ret < 0)
2757 return ret;
2758
2759 ret = phylink_bringup_phy(pl, phy, interface);
2760 if (ret)
2761 phy_detach(phy);
2762
2763 return ret;
2764 }
2765
phylink_sfp_disconnect_phy(void * upstream)2766 static void phylink_sfp_disconnect_phy(void *upstream)
2767 {
2768 phylink_disconnect_phy(upstream);
2769 }
2770
2771 static const struct sfp_upstream_ops sfp_phylink_ops = {
2772 .attach = phylink_sfp_attach,
2773 .detach = phylink_sfp_detach,
2774 .module_insert = phylink_sfp_module_insert,
2775 .module_start = phylink_sfp_module_start,
2776 .module_stop = phylink_sfp_module_stop,
2777 .link_up = phylink_sfp_link_up,
2778 .link_down = phylink_sfp_link_down,
2779 .connect_phy = phylink_sfp_connect_phy,
2780 .disconnect_phy = phylink_sfp_disconnect_phy,
2781 };
2782
2783 /* Helpers for MAC drivers */
2784
phylink_decode_c37_word(struct phylink_link_state * state,uint16_t config_reg,int speed)2785 static void phylink_decode_c37_word(struct phylink_link_state *state,
2786 uint16_t config_reg, int speed)
2787 {
2788 bool tx_pause, rx_pause;
2789 int fd_bit;
2790
2791 if (speed == SPEED_2500)
2792 fd_bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT;
2793 else
2794 fd_bit = ETHTOOL_LINK_MODE_1000baseX_Full_BIT;
2795
2796 mii_lpa_mod_linkmode_x(state->lp_advertising, config_reg, fd_bit);
2797
2798 if (linkmode_test_bit(fd_bit, state->advertising) &&
2799 linkmode_test_bit(fd_bit, state->lp_advertising)) {
2800 state->speed = speed;
2801 state->duplex = DUPLEX_FULL;
2802 } else {
2803 /* negotiation failure */
2804 state->link = false;
2805 }
2806
2807 linkmode_resolve_pause(state->advertising, state->lp_advertising,
2808 &tx_pause, &rx_pause);
2809
2810 if (tx_pause)
2811 state->pause |= MLO_PAUSE_TX;
2812 if (rx_pause)
2813 state->pause |= MLO_PAUSE_RX;
2814 }
2815
phylink_decode_sgmii_word(struct phylink_link_state * state,uint16_t config_reg)2816 static void phylink_decode_sgmii_word(struct phylink_link_state *state,
2817 uint16_t config_reg)
2818 {
2819 if (!(config_reg & LPA_SGMII_LINK)) {
2820 state->link = false;
2821 return;
2822 }
2823
2824 switch (config_reg & LPA_SGMII_SPD_MASK) {
2825 case LPA_SGMII_10:
2826 state->speed = SPEED_10;
2827 break;
2828 case LPA_SGMII_100:
2829 state->speed = SPEED_100;
2830 break;
2831 case LPA_SGMII_1000:
2832 state->speed = SPEED_1000;
2833 break;
2834 default:
2835 state->link = false;
2836 return;
2837 }
2838 if (config_reg & LPA_SGMII_FULL_DUPLEX)
2839 state->duplex = DUPLEX_FULL;
2840 else
2841 state->duplex = DUPLEX_HALF;
2842 }
2843
2844 /**
2845 * phylink_decode_usxgmii_word() - decode the USXGMII word from a MAC PCS
2846 * @state: a pointer to a struct phylink_link_state.
2847 * @lpa: a 16 bit value which stores the USXGMII auto-negotiation word
2848 *
2849 * Helper for MAC PCS supporting the USXGMII protocol and the auto-negotiation
2850 * code word. Decode the USXGMII code word and populate the corresponding fields
2851 * (speed, duplex) into the phylink_link_state structure.
2852 */
phylink_decode_usxgmii_word(struct phylink_link_state * state,uint16_t lpa)2853 void phylink_decode_usxgmii_word(struct phylink_link_state *state,
2854 uint16_t lpa)
2855 {
2856 switch (lpa & MDIO_USXGMII_SPD_MASK) {
2857 case MDIO_USXGMII_10:
2858 state->speed = SPEED_10;
2859 break;
2860 case MDIO_USXGMII_100:
2861 state->speed = SPEED_100;
2862 break;
2863 case MDIO_USXGMII_1000:
2864 state->speed = SPEED_1000;
2865 break;
2866 case MDIO_USXGMII_2500:
2867 state->speed = SPEED_2500;
2868 break;
2869 case MDIO_USXGMII_5000:
2870 state->speed = SPEED_5000;
2871 break;
2872 case MDIO_USXGMII_10G:
2873 state->speed = SPEED_10000;
2874 break;
2875 default:
2876 state->link = false;
2877 return;
2878 }
2879
2880 if (lpa & MDIO_USXGMII_FULL_DUPLEX)
2881 state->duplex = DUPLEX_FULL;
2882 else
2883 state->duplex = DUPLEX_HALF;
2884 }
2885 EXPORT_SYMBOL_GPL(phylink_decode_usxgmii_word);
2886
2887 /**
2888 * phylink_mii_c22_pcs_decode_state() - Decode MAC PCS state from MII registers
2889 * @state: a pointer to a &struct phylink_link_state.
2890 * @bmsr: The value of the %MII_BMSR register
2891 * @lpa: The value of the %MII_LPA register
2892 *
2893 * Helper for MAC PCS supporting the 802.3 clause 22 register set for
2894 * clause 37 negotiation and/or SGMII control.
2895 *
2896 * Parse the Clause 37 or Cisco SGMII link partner negotiation word into
2897 * the phylink @state structure. This is suitable to be used for implementing
2898 * the mac_pcs_get_state() member of the struct phylink_mac_ops structure if
2899 * accessing @bmsr and @lpa cannot be done with MDIO directly.
2900 */
phylink_mii_c22_pcs_decode_state(struct phylink_link_state * state,u16 bmsr,u16 lpa)2901 void phylink_mii_c22_pcs_decode_state(struct phylink_link_state *state,
2902 u16 bmsr, u16 lpa)
2903 {
2904 state->link = !!(bmsr & BMSR_LSTATUS);
2905 state->an_complete = !!(bmsr & BMSR_ANEGCOMPLETE);
2906 /* If there is no link or autonegotiation is disabled, the LP advertisement
2907 * data is not meaningful, so don't go any further.
2908 */
2909 if (!state->link || !state->an_enabled)
2910 return;
2911
2912 switch (state->interface) {
2913 case PHY_INTERFACE_MODE_1000BASEX:
2914 phylink_decode_c37_word(state, lpa, SPEED_1000);
2915 break;
2916
2917 case PHY_INTERFACE_MODE_2500BASEX:
2918 phylink_decode_c37_word(state, lpa, SPEED_2500);
2919 break;
2920
2921 case PHY_INTERFACE_MODE_SGMII:
2922 case PHY_INTERFACE_MODE_QSGMII:
2923 phylink_decode_sgmii_word(state, lpa);
2924 break;
2925
2926 default:
2927 state->link = false;
2928 break;
2929 }
2930 }
2931 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_decode_state);
2932
2933 /**
2934 * phylink_mii_c22_pcs_get_state() - read the MAC PCS state
2935 * @pcs: a pointer to a &struct mdio_device.
2936 * @state: a pointer to a &struct phylink_link_state.
2937 *
2938 * Helper for MAC PCS supporting the 802.3 clause 22 register set for
2939 * clause 37 negotiation and/or SGMII control.
2940 *
2941 * Read the MAC PCS state from the MII device configured in @config and
2942 * parse the Clause 37 or Cisco SGMII link partner negotiation word into
2943 * the phylink @state structure. This is suitable to be directly plugged
2944 * into the mac_pcs_get_state() member of the struct phylink_mac_ops
2945 * structure.
2946 */
phylink_mii_c22_pcs_get_state(struct mdio_device * pcs,struct phylink_link_state * state)2947 void phylink_mii_c22_pcs_get_state(struct mdio_device *pcs,
2948 struct phylink_link_state *state)
2949 {
2950 int bmsr, lpa;
2951
2952 bmsr = mdiodev_read(pcs, MII_BMSR);
2953 lpa = mdiodev_read(pcs, MII_LPA);
2954 if (bmsr < 0 || lpa < 0) {
2955 state->link = false;
2956 return;
2957 }
2958
2959 phylink_mii_c22_pcs_decode_state(state, bmsr, lpa);
2960 }
2961 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_get_state);
2962
2963 /**
2964 * phylink_mii_c22_pcs_encode_advertisement() - configure the clause 37 PCS
2965 * advertisement
2966 * @interface: the PHY interface mode being configured
2967 * @advertising: the ethtool advertisement mask
2968 *
2969 * Helper for MAC PCS supporting the 802.3 clause 22 register set for
2970 * clause 37 negotiation and/or SGMII control.
2971 *
2972 * Encode the clause 37 PCS advertisement as specified by @interface and
2973 * @advertising.
2974 *
2975 * Return: The new value for @adv, or ``-EINVAL`` if it should not be changed.
2976 */
phylink_mii_c22_pcs_encode_advertisement(phy_interface_t interface,const unsigned long * advertising)2977 int phylink_mii_c22_pcs_encode_advertisement(phy_interface_t interface,
2978 const unsigned long *advertising)
2979 {
2980 u16 adv;
2981
2982 switch (interface) {
2983 case PHY_INTERFACE_MODE_1000BASEX:
2984 case PHY_INTERFACE_MODE_2500BASEX:
2985 adv = ADVERTISE_1000XFULL;
2986 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2987 advertising))
2988 adv |= ADVERTISE_1000XPAUSE;
2989 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2990 advertising))
2991 adv |= ADVERTISE_1000XPSE_ASYM;
2992 return adv;
2993 case PHY_INTERFACE_MODE_SGMII:
2994 return 0x0001;
2995 default:
2996 /* Nothing to do for other modes */
2997 return -EINVAL;
2998 }
2999 }
3000 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_encode_advertisement);
3001
3002 /**
3003 * phylink_mii_c22_pcs_config() - configure clause 22 PCS
3004 * @pcs: a pointer to a &struct mdio_device.
3005 * @mode: link autonegotiation mode
3006 * @interface: the PHY interface mode being configured
3007 * @advertising: the ethtool advertisement mask
3008 *
3009 * Configure a Clause 22 PCS PHY with the appropriate negotiation
3010 * parameters for the @mode, @interface and @advertising parameters.
3011 * Returns negative error number on failure, zero if the advertisement
3012 * has not changed, or positive if there is a change.
3013 */
phylink_mii_c22_pcs_config(struct mdio_device * pcs,unsigned int mode,phy_interface_t interface,const unsigned long * advertising)3014 int phylink_mii_c22_pcs_config(struct mdio_device *pcs, unsigned int mode,
3015 phy_interface_t interface,
3016 const unsigned long *advertising)
3017 {
3018 bool changed = 0;
3019 u16 bmcr;
3020 int ret, adv;
3021
3022 adv = phylink_mii_c22_pcs_encode_advertisement(interface, advertising);
3023 if (adv >= 0) {
3024 ret = mdiobus_modify_changed(pcs->bus, pcs->addr,
3025 MII_ADVERTISE, 0xffff, adv);
3026 if (ret < 0)
3027 return ret;
3028 changed = ret;
3029 }
3030
3031 /* Ensure ISOLATE bit is disabled */
3032 if (mode == MLO_AN_INBAND &&
3033 linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, advertising))
3034 bmcr = BMCR_ANENABLE;
3035 else
3036 bmcr = 0;
3037
3038 ret = mdiodev_modify(pcs, MII_BMCR, BMCR_ANENABLE | BMCR_ISOLATE, bmcr);
3039 if (ret < 0)
3040 return ret;
3041
3042 return changed;
3043 }
3044 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_config);
3045
3046 /**
3047 * phylink_mii_c22_pcs_an_restart() - restart 802.3z autonegotiation
3048 * @pcs: a pointer to a &struct mdio_device.
3049 *
3050 * Helper for MAC PCS supporting the 802.3 clause 22 register set for
3051 * clause 37 negotiation.
3052 *
3053 * Restart the clause 37 negotiation with the link partner. This is
3054 * suitable to be directly plugged into the mac_pcs_get_state() member
3055 * of the struct phylink_mac_ops structure.
3056 */
phylink_mii_c22_pcs_an_restart(struct mdio_device * pcs)3057 void phylink_mii_c22_pcs_an_restart(struct mdio_device *pcs)
3058 {
3059 int val = mdiodev_read(pcs, MII_BMCR);
3060
3061 if (val >= 0) {
3062 val |= BMCR_ANRESTART;
3063
3064 mdiodev_write(pcs, MII_BMCR, val);
3065 }
3066 }
3067 EXPORT_SYMBOL_GPL(phylink_mii_c22_pcs_an_restart);
3068
phylink_mii_c45_pcs_get_state(struct mdio_device * pcs,struct phylink_link_state * state)3069 void phylink_mii_c45_pcs_get_state(struct mdio_device *pcs,
3070 struct phylink_link_state *state)
3071 {
3072 struct mii_bus *bus = pcs->bus;
3073 int addr = pcs->addr;
3074 int stat;
3075
3076 stat = mdiobus_c45_read(bus, addr, MDIO_MMD_PCS, MDIO_STAT1);
3077 if (stat < 0) {
3078 state->link = false;
3079 return;
3080 }
3081
3082 state->link = !!(stat & MDIO_STAT1_LSTATUS);
3083 if (!state->link)
3084 return;
3085
3086 switch (state->interface) {
3087 case PHY_INTERFACE_MODE_10GBASER:
3088 state->speed = SPEED_10000;
3089 state->duplex = DUPLEX_FULL;
3090 break;
3091
3092 default:
3093 break;
3094 }
3095 }
3096 EXPORT_SYMBOL_GPL(phylink_mii_c45_pcs_get_state);
3097
3098 MODULE_LICENSE("GPL v2");
3099